synclink_cs.c revision 33f0f88f1c51ae5c2d593d26960c760ea154c2e2
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * linux/drivers/char/pcmcia/synclink_cs.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $ 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Device driver for Microgate SyncLink PC Card 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * multiprotocol serial adapter. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * written by Paul Fulghum for Microgate Corporation 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * paulkf@microgate.com 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Microgate and SyncLink are trademarks of Microgate Corporation 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is released under the GNU General Public License (GPL) 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * OF THE POSSIBILITY OF SUCH DAMAGE. 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if defined(__i386__) 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define BREAKPOINT() asm(" int $3"); 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds# define BREAKPOINT() { } 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MAX_DEVICE_COUNT 4 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/config.h> 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/signal.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/timer.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/time.h> 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pci.h> 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty.h> 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty_flip.h> 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/serial.h> 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/major.h> 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fcntl.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ptrace.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ioport.h> 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/netdevice.h> 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/vmalloc.h> 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/serial.h> 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/delay.h> 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ioctl.h> 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/system.h> 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/dma.h> 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/bitops.h> 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/types.h> 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/termios.h> 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/workqueue.h> 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/hdlc.h> 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <pcmcia/cs_types.h> 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <pcmcia/cs.h> 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <pcmcia/cistpl.h> 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <pcmcia/cisreg.h> 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <pcmcia/ds.h> 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC_MODULE 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CONFIG_HDLC 1 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GET_USER(error,value,addr) error = get_user(value,addr) 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PUT_USER(error,value,addr) error = put_user(value,addr) 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "linux/synclink.h" 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic MGSL_PARAMS default_params = { 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSL_MODE_HDLC, /* unsigned long mode */ 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, /* unsigned char loopback; */ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, /* unsigned long clock_speed; */ 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff, /* unsigned char addr_filter; */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9600, /* unsigned long data_rate; */ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8, /* unsigned char data_bits; */ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1, /* unsigned char stop_bits; */ 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ASYNC_PARITY_NONE /* unsigned char parity; */ 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int count; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char status; 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char data[1]; 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} RXBUF; 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* The queue of BH actions to be performed */ 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define BH_RECEIVE 1 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define BH_TRANSMIT 2 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define BH_STATUS 4 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IO_PIN_SHUTDOWN_LIMIT 100 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct _input_signal_events { 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ri_up; 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ri_down; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int dsr_up; 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int dsr_down; 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int dcd_up; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int dcd_down; 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int cts_up; 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int cts_down; 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Device instance data structure 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct _mgslpc_info { 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *if_ptr; /* General purpose pointer (used by SPPP) */ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int magic; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int flags; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int count; /* count of opens */ 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int line; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short close_delay; 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short closing_wait; /* time to wait before closing */ 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mgsl_icount icount; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tty_struct *tty; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int timeout; 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int x_char; /* xon/xoff character */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int blocked_open; /* # of blocked opens */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char read_status_mask; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char ignore_status_mask; 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *tx_buf; 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tx_put; 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tx_get; 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tx_count; 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* circular list of fixed length rx buffers */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *rx_buf; /* memory allocated for all rx buffers */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rx_buf_total_size; /* size of memory allocated for rx buffers */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rx_put; /* index of next empty rx buffer */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rx_get; /* index of next full rx buffer */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rx_buf_size; /* size in bytes of single rx buffer */ 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rx_buf_count; /* total number of rx buffers */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rx_frame_count; /* number of full rx buffers */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t open_wait; 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t close_wait; 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t status_event_wait_q; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t event_wait_q; 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct timer_list tx_timer; /* HDLC transmit timeout timer */ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct _mgslpc_info *next_device; /* device list link */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short imra_value; 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short imrb_value; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char pim_value; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t lock; 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct work_struct task; /* task structure for scheduling bh */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 max_frame_size; 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 pending_bh; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bh_running; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bh_requested; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int dcd_chkcount; /* check counts to prevent */ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int cts_chkcount; /* too many IRQs if a signal */ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int dsr_chkcount; /* is floating */ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ri_chkcount; 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rx_enabled; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rx_overflow; 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tx_enabled; 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tx_active; 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tx_aborting; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 idle_mode; 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int if_mode; /* serial interface selection (RS-232, v.35 etc) */ 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char device_name[25]; /* device instance name */ 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int io_base; /* base I/O address of adapter */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irq_level; 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSL_PARAMS params; /* communications parameters */ 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char serial_signals; /* current serial signal states */ 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char irq_occurred; /* for diagnostics use */ 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char testing_irq; 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int init_error; /* startup error (DIAGS) */ 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char flag_buf[MAX_ASYNC_BUFFER_SIZE]; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BOOLEAN drop_rts_on_tx_done; 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct _input_signal_events input_signal_events; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* PCMCIA support */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_link_t link; 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_node_t node; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int stop; 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* SPPP/Cisco HDLC device parts */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int netcount; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int dosyncppp; 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t netlock; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device *netdev; 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} MGSLPC_INFO; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MGSLPC_MAGIC 0x5402 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The size of the serial xmit buffer is 1 page, or 4096 bytes 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define TXBUFSIZE 4096 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CHA 0x00 /* channel A offset */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CHB 0x40 /* channel B offset */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it. 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef PVR 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RXFIFO 0 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define TXFIFO 0 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STAR 0x20 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CMDR 0x20 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RSTA 0x21 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PRE 0x21 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MODE 0x22 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define TIMR 0x23 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define XAD1 0x24 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define XAD2 0x25 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RAH1 0x26 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RAH2 0x27 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DAFO 0x27 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RAL1 0x28 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RFC 0x28 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RHCR 0x29 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RAL2 0x29 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RBCL 0x2a 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define XBCL 0x2a 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RBCH 0x2b 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define XBCH 0x2b 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CCR0 0x2c 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CCR1 0x2d 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CCR2 0x2e 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CCR3 0x2f 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VSTR 0x34 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define BGR 0x34 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RLCR 0x35 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define AML 0x36 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define AMH 0x37 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GIS 0x38 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IVA 0x38 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IPC 0x39 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ISR 0x3a 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IMR 0x3a 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PVR 0x3c 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PIS 0x3d 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PIM 0x3d 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PCR 0x3e 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CCR4 0x3f 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// IMR/ISR 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_BREAK_ON BIT15 // rx break detected 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_DATAOVERRUN BIT14 // receive data overflow 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_ALLSENT BIT13 // all sent 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_UNDERRUN BIT12 // transmit data underrun 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_TIMER BIT11 // timer interrupt 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_CTS BIT10 // CTS status change 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_TXREPEAT BIT9 // tx message repeat 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_TXFIFO BIT8 // transmit pool ready 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_RXEOM BIT7 // receive message end 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_EXITHUNT BIT6 // receive frame start 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_RXTIME BIT6 // rx char timeout 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_DCD BIT2 // carrier detect status change 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_OVERRUN BIT1 // receive frame overflow 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define IRQ_RXFIFO BIT0 // receive pool full 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// STAR 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define XFW BIT6 // transmit FIFO write enable 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CEC BIT2 // command executing 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CTS BIT1 // CTS state 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PVR_DTR BIT0 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PVR_DSR BIT1 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PVR_RI BIT2 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PVR_AUTOCTS BIT3 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PVR_RS232 0x20 /* 0010b */ 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PVR_V35 0xe0 /* 1110b */ 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PVR_RS422 0x40 /* 0100b */ 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Register access functions */ 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define write_reg(info, reg, val) outb((val),(info)->io_base + (reg)) 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define read_reg(info, reg) inb((info)->io_base + (reg)) 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define read_reg16(info, reg) inw((info)->io_base + (reg)) 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg)) 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define set_reg_bits(info, reg, mask) \ 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, (reg), \ 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned char) (read_reg(info, (reg)) | (mask))) 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define clear_reg_bits(info, reg, mask) \ 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, (reg), \ 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned char) (read_reg(info, (reg)) & ~(mask))) 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * interrupt enable/disable routines 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (channel == CHA) { 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->imra_value |= mask; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg16(info, CHA + IMR, info->imra_value); 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->imrb_value |= mask; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg16(info, CHB + IMR, info->imrb_value); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (channel == CHA) { 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->imra_value &= ~mask; 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg16(info, CHA + IMR, info->imra_value); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->imrb_value &= ~mask; 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg16(info, CHB + IMR, info->imrb_value); 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define port_irq_disable(info, mask) \ 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); } 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define port_irq_enable(info, mask) \ 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); } 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void rx_start(MGSLPC_INFO *info); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void rx_stop(MGSLPC_INFO *info); 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void tx_start(MGSLPC_INFO *info); 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void tx_stop(MGSLPC_INFO *info); 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void tx_set_idle(MGSLPC_INFO *info); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void get_signals(MGSLPC_INFO *info); 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void set_signals(MGSLPC_INFO *info); 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void reset_device(MGSLPC_INFO *info); 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hdlc_mode(MGSLPC_INFO *info); 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void async_mode(MGSLPC_INFO *info); 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void tx_timeout(unsigned long context); 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define dev_to_port(D) (dev_to_hdlc(D)->priv) 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hdlcdev_tx_done(MGSLPC_INFO *info); 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size); 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hdlcdev_init(MGSLPC_INFO *info); 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hdlcdev_exit(MGSLPC_INFO *info); 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit); 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic BOOLEAN register_test(MGSLPC_INFO *info); 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic BOOLEAN irq_test(MGSLPC_INFO *info); 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int adapter_test(MGSLPC_INFO *info); 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int claim_resources(MGSLPC_INFO *info); 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void release_resources(MGSLPC_INFO *info); 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_add_device(MGSLPC_INFO *info); 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_remove_device(MGSLPC_INFO *info); 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rx_get_frame(MGSLPC_INFO *info); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void rx_reset_buffers(MGSLPC_INFO *info); 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rx_alloc_buffers(MGSLPC_INFO *info); 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void rx_free_buffers(MGSLPC_INFO *info); 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bottom half interrupt handlers 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void bh_handler(void* Context); 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void bh_transmit(MGSLPC_INFO *info); 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void bh_status(MGSLPC_INFO *info); 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ioctl handlers 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int tiocmget(struct tty_struct *tty, struct file *file); 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int tiocmset(struct tty_struct *tty, struct file *file, 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int set, unsigned int clear); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params); 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params); 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_txidle(MGSLPC_INFO *info, int __user *idle_mode); 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_txidle(MGSLPC_INFO *info, int idle_mode); 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_txenable(MGSLPC_INFO *info, int enable); 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int tx_abort(MGSLPC_INFO *info); 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_rxenable(MGSLPC_INFO *info, int enable); 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wait_events(MGSLPC_INFO *info, int __user *mask); 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic MGSLPC_INFO *mgslpc_device_list = NULL; 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mgslpc_device_count = 0; 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set this param to non-zero to load eax with the 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * .text section address and breakpoint on module load. 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is useful for use with gdb and add-symbol-file command. 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int break_on_load=0; 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Driver major number, defaults to zero to get auto 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * assigned major number. May be forced as module parameter. 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ttymajor=0; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int debug_level = 0; 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int maxframe[MAX_DEVICE_COUNT] = {0,}; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int dosyncppp[MAX_DEVICE_COUNT] = {1,1,1,1}; 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param(break_on_load, bool, 0); 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param(ttymajor, int, 0); 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param(debug_level, int, 0); 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_array(maxframe, int, NULL, 0); 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_array(dosyncppp, int, NULL, 0); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char *driver_name = "SyncLink PC Card driver"; 475a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghumstatic char *driver_version = "$Revision: 4.34 $"; 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct tty_driver *serial_driver; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* number of characters left in xmit buffer before we ask for more */ 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define WAKEUP_CHARS 256 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_change_params(MGSLPC_INFO *info); 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout); 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* PCMCIA prototypes */ 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_config(dev_link_t *link); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_release(u_long arg); 489cc3b4866bee996c922e875b8c8efe9f0d8803aaeDominik Brodowskistatic void mgslpc_detach(struct pcmcia_device *p_dev); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1st function defined in .text section. Calling this function in 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * init_module() followed by a breakpoint allows a remote debugger 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (gdb) to get the .text address for the add-symbol-file command. 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This allows remote debugging of dynamically loadable modules. 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void* mgslpc_get_text_ptr(void) 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mgslpc_get_text_ptr; 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * line discipline callback wrappers 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The wrappers maintain line discipline references 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while calling into the line discipline. 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ldisc_flush_buffer - flush line discipline receive buffers 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ldisc_receive_buf - pass receive data to line discipline 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ldisc_flush_buffer(struct tty_struct *tty) 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tty_ldisc *ld = tty_ldisc_ref(tty); 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ld) { 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ld->flush_buffer) 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ld->flush_buffer(tty); 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_ldisc_deref(ld); 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ldisc_receive_buf(struct tty_struct *tty, 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const __u8 *data, char *flags, int count) 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tty_ldisc *ld; 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!tty) 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ld = tty_ldisc_ref(tty); 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ld) { 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ld->receive_buf) 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ld->receive_buf(tty, data, flags, count); 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_ldisc_deref(ld); 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 536f8cfa618dccbdc6dab5297f75779566a388a98fdDominik Brodowskistatic int mgslpc_attach(struct pcmcia_device *p_dev) 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_link_t *link; 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("mgslpc_attach\n"); 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL); 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info) { 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("Error can't allocate device instance data\n"); 547f8cfa618dccbdc6dab5297f75779566a388a98fdDominik Brodowski return -ENOMEM; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(info, 0, sizeof(MGSLPC_INFO)); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->magic = MGSLPC_MAGIC; 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_WORK(&info->task, bh_handler, info); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->max_frame_size = 4096; 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->close_delay = 5*HZ/10; 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->closing_wait = 30*HZ; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&info->open_wait); 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&info->close_wait); 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&info->status_event_wait_q); 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&info->event_wait_q); 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&info->lock); 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&info->netlock); 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->idle_mode = HDLC_TXIDLE_FLAGS; 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->imra_value = 0xffff; 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->imrb_value = 0xffff; 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pim_value = 0xff; 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link = &info->link; 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->priv = info; 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Initialize the dev_link_t structure */ 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Interrupt setup */ 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; 5750c7ab67602e65b3ba7aaa81f023b034cd7458ec6Dominik Brodowski link->irq.IRQInfo1 = IRQ_LEVEL_ID; 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->irq.Handler = NULL; 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.Attributes = 0; 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.Vcc = 50; 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.IntType = INT_MEMORY_AND_IO; 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 582f8cfa618dccbdc6dab5297f75779566a388a98fdDominik Brodowski link->handle = p_dev; 583f8cfa618dccbdc6dab5297f75779566a388a98fdDominik Brodowski p_dev->instance = link; 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 585f8cfa618dccbdc6dab5297f75779566a388a98fdDominik Brodowski link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; 586f8cfa618dccbdc6dab5297f75779566a388a98fdDominik Brodowski mgslpc_config(link); 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_add_device(info); 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 590f8cfa618dccbdc6dab5297f75779566a388a98fdDominik Brodowski return 0; 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Card has been inserted. 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CS_CHECK(fn, ret) \ 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdo { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_config(dev_link_t *link) 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds client_handle_t handle = link->handle; 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = link->priv; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tuple_t tuple; 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cisparse_t parse; 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int last_fn, last_ret; 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u_char buf[64]; 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds config_info_t conf; 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cistpl_cftable_entry_t dflt = { 0 }; 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cistpl_cftable_entry_t *cfg; 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("mgslpc_config(0x%p)\n", link); 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* read CONFIG tuple to find its configuration registers */ 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tuple.DesiredTuple = CISTPL_CONFIG; 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tuple.Attributes = 0; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tuple.TupleData = buf; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tuple.TupleDataMax = sizeof(buf); 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tuple.TupleOffset = 0; 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.ConfigBase = parse.config.base; 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.Present = parse.config.rmask[0]; 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Configure card */ 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->state |= DEV_CONFIG; 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Look up the current Vcc */ 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf)); 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.Vcc = conf.Vcc; 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* get CIS configuration entry */ 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cfg = &(parse.cftable_entry); 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg; 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cfg->index == 0) 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cs_failed; 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.ConfigIndex = cfg->index; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.Attributes |= CONF_ENABLE_IRQ; 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* IO window settings */ 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->io.NumPorts1 = 0; 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) { 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io; 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(io->flags & CISTPL_IO_8BIT)) 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->io.Attributes1 = IO_DATA_PATH_WIDTH_16; 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(io->flags & CISTPL_IO_16BIT)) 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->io.BasePort1 = io->win[0].base; 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->io.NumPorts1 = io->win[0].len; 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(RequestIO, pcmcia_request_io(link->handle, &link->io)); 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.Attributes = CONF_ENABLE_IRQ; 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.Vcc = 50; 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.IntType = INT_MEMORY_AND_IO; 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.ConfigIndex = 8; 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->conf.Present = PRESENT_OPTION; 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->irq.Attributes |= IRQ_HANDLE_PRESENT; 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->irq.Handler = mgslpc_isr; 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->irq.Instance = info; 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq)); 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf)); 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->io_base = link->io.BasePort1; 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->irq_level = link->irq.AssignedIRQ; 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* add to linked list of devices */ 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(info->node.dev_name, "mgslpc0"); 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->node.major = info->node.minor = 0; 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->dev = &info->node; 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_INFO "%s: index 0x%02x:", 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->node.dev_name, link->conf.ConfigIndex); 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (link->conf.Attributes & CONF_ENABLE_IRQ) 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(", irq %d", link->irq.AssignedIRQ); 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (link->io.NumPorts1) 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(", io 0x%04x-0x%04x", link->io.BasePort1, 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->io.BasePort1+link->io.NumPorts1-1); 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->state &= ~DEV_CONFIG_PENDING; 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscs_failed: 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cs_error(link->handle, last_fn, last_ret); 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_release((u_long)link); 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Card has been removed. 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Unregister device and release PCMCIA configuration. 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If device is open, postpone until it is closed. 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_release(u_long arg) 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_link_t *link = (dev_link_t *)arg; 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("mgslpc_release(0x%p)\n", link); 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unlink the device chain */ 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->dev = NULL; 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link->state &= ~DEV_CONFIG; 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pcmcia_release_configuration(link->handle); 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (link->io.NumPorts1) 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pcmcia_release_io(link->handle, &link->io); 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (link->irq.AssignedIRQ) 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pcmcia_release_irq(link->handle, &link->irq); 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 724cc3b4866bee996c922e875b8c8efe9f0d8803aaeDominik Brodowskistatic void mgslpc_detach(struct pcmcia_device *p_dev) 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 726cc3b4866bee996c922e875b8c8efe9f0d8803aaeDominik Brodowski dev_link_t *link = dev_to_instance(p_dev); 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("mgslpc_detach(0x%p)\n", link); 730cc3b4866bee996c922e875b8c8efe9f0d8803aaeDominik Brodowski 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (link->state & DEV_CONFIG) { 732cc3b4866bee996c922e875b8c8efe9f0d8803aaeDominik Brodowski ((MGSLPC_INFO *)link->priv)->stop = 1; 733cc3b4866bee996c922e875b8c8efe9f0d8803aaeDominik Brodowski mgslpc_release((u_long)link); 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_remove_device((MGSLPC_INFO *)link->priv); 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 73998e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowskistatic int mgslpc_suspend(struct pcmcia_device *dev) 74098e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski{ 74198e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski dev_link_t *link = dev_to_instance(dev); 74298e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski MGSLPC_INFO *info = link->priv; 74398e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski 74498e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski link->state |= DEV_SUSPEND; 74598e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski info->stop = 1; 74698e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski if (link->state & DEV_CONFIG) 74798e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski pcmcia_release_configuration(link->handle); 74898e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski 74998e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski return 0; 75098e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski} 75198e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski 75298e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowskistatic int mgslpc_resume(struct pcmcia_device *dev) 75398e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski{ 75498e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski dev_link_t *link = dev_to_instance(dev); 75598e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski MGSLPC_INFO *info = link->priv; 75698e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski 75798e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski link->state &= ~DEV_SUSPEND; 75898e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski if (link->state & DEV_CONFIG) 75998e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski pcmcia_request_configuration(link->handle, &link->conf); 76098e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski info->stop = 0; 76198e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski 76298e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski return 0; 76398e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski} 76498e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski 76598e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int mgslpc_paranoia_check(MGSLPC_INFO *info, 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *name, const char *routine) 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef MGSLPC_PARANOIA_CHECK 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static const char *badmagic = 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Warning: bad magic number for mgsl struct (%s) in %s\n"; 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static const char *badinfo = 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Warning: null mgslpc_info for (%s) in %s\n"; 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info) { 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(badinfo, name, routine); 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->magic != MGSLPC_MAGIC) { 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(badmagic, name, routine); 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info) 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CMD_RXFIFO BIT7 // release current rx FIFO 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CMD_RXRESET BIT6 // receiver reset 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CMD_RXFIFO_READ BIT5 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CMD_START_TIMER BIT4 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CMD_TXFIFO BIT3 // release current tx FIFO 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CMD_TXEOM BIT1 // transmit end message 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CMD_TXRESET BIT0 // transmit reset 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic BOOLEAN wait_command_complete(MGSLPC_INFO *info, unsigned char channel) 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i = 0; 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wait for command completion */ 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) { 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds udelay(1); 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (i++ == 1000) 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return FALSE; 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return TRUE; 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd) 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_command_complete(info, channel); 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, (unsigned char) (channel + CMDR), cmd); 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void tx_pause(struct tty_struct *tty) 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "tx_pause")) 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("tx_pause(%s)\n",info->device_name); 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_enabled) 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void tx_release(struct tty_struct *tty) 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "tx_release")) 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("tx_release(%s)\n",info->device_name); 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_enabled) 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_start(info); 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Return next bottom half action to perform. 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or 0 if nothing to do. 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int bh_action(MGSLPC_INFO *info) 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->pending_bh & BH_RECEIVE) { 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh &= ~BH_RECEIVE; 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = BH_RECEIVE; 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (info->pending_bh & BH_TRANSMIT) { 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh &= ~BH_TRANSMIT; 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = BH_TRANSMIT; 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (info->pending_bh & BH_STATUS) { 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh &= ~BH_STATUS; 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = BH_STATUS; 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!rc) { 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Mark BH routine as complete */ 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->bh_running = 0; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->bh_requested = 0; 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid bh_handler(void* Context) 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO*)Context; 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int action; 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info) 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_BH) 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):bh_handler(%s) entry\n", 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name); 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->bh_running = 1; 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while((action = bh_action(info)) != 0) { 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Process work item */ 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( debug_level >= DEBUG_LEVEL_BH ) 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):bh_handler() work item action=%d\n", 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,action); 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (action) { 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case BH_RECEIVE: 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(rx_get_frame(info)); 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case BH_TRANSMIT: 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh_transmit(info); 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case BH_STATUS: 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh_status(info); 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* unknown work item ID */ 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("Unknown work item ID=%08X!\n", action); 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_BH) 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):bh_handler(%s) exit\n", 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name); 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid bh_transmit(MGSLPC_INFO *info) 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tty_struct *tty = info->tty; 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_BH) 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("bh_transmit() entry on %s\n", info->device_name); 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty) { 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_wakeup(tty); 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&tty->write_wait); 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid bh_status(MGSLPC_INFO *info) 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->ri_chkcount = 0; 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->dsr_chkcount = 0; 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->dcd_chkcount = 0; 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->cts_chkcount = 0; 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* eom: non-zero = end of frame */ 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void rx_ready_hdlc(MGSLPC_INFO *info, int eom) 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char data[2]; 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char fifo_count, read_count, i; 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size)); 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom); 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->rx_enabled) 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->rx_frame_count >= info->rx_buf_count) { 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* no more free buffers */ 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_RXRESET); 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_RECEIVE; 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_overflow = 1; 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.buf_overrun++; 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (eom) { 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* end of frame, get FIFO count from RBCL register */ 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f))) 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fifo_count = 32; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fifo_count = 32; 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fifo_count == 1) { 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_count = 1; 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data[0] = read_reg(info, CHA + RXFIFO); 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_count = 2; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO); 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fifo_count -= read_count; 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fifo_count && eom) 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->status = data[--read_count]; 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < read_count; i++) { 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buf->count >= info->max_frame_size) { 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* frame too large, reset receiver and reset current buffer */ 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_RXRESET); 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->count = 0; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(buf->data + buf->count) = data[i]; 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->count++; 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } while (fifo_count); 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (eom) { 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_RECEIVE; 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_frame_count++; 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_put++; 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->rx_put >= info->rx_buf_count) 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_put = 0; 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_RXFIFO); 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void rx_ready_async(MGSLPC_INFO *info, int tcd) 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 101033f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox unsigned char data, status, flag; 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int fifo_count; 101233f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox int work = 0; 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tty_struct *tty = info->tty; 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mgsl_icount *icount = &info->icount; 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tcd) { 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* early termination, get FIFO count from RBCL register */ 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Zero fifo count could mean 0 or 32 bytes available. 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If BIT5 of STAR is set then at least 1 byte is available. 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5)) 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fifo_count = 32; 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fifo_count = 32; 102733f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox 102833f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox tty_buffer_request_room(tty, fifo_count); 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Flush received async data to receive data buffer. */ 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fifo_count) { 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data = read_reg(info, CHA + RXFIFO); 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = read_reg(info, CHA + RXFIFO); 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fifo_count -= 2; 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds icount->rx++; 103633f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox flag = TTY_NORMAL; 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // if no frameing/crc error then save data 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // BIT7:parity error 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // BIT6:framing error 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & (BIT7 + BIT6)) { 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & BIT7) 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds icount->parity++; 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds icount->frame++; 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* discard char if tty control flags say so */ 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & info->ignore_status_mask) 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status &= info->read_status_mask; 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & BIT7) 105533f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox flag = TTY_PARITY; 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (status & BIT6) 105733f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox flag = TTY_FRAME; 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 105933f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox work += tty_insert_flip_char(tty, data, flag); 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_RXFIFO); 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) { 106433f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox printk("%s(%d):rx_ready_async", 106533f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox __FILE__,__LINE__); 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,icount->rx,icount->brk, 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds icount->parity,icount->frame,icount->overrun); 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 107133f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox if (work) 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_flip_buffer_push(tty); 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void tx_done(MGSLPC_INFO *info) 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_active) 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_active = 0; 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_aborting = 0; 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_ASYNC) 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_count = info->tx_put = info->tx_get = 0; 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_timer(&info->tx_timer); 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->drop_rts_on_tx_done) { 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_RTS) { 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals &= ~SerialSignal_RTS; 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->drop_rts_on_tx_done = 0; 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->netcount) 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlcdev_tx_done(info); 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tty->stopped || info->tty->hw_stopped) { 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_TRANSMIT; 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void tx_ready(MGSLPC_INFO *info) 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char fifo_count = 32; 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int c; 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name); 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC) { 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_active) 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tty->stopped || info->tty->hw_stopped) { 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_count) 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_active = 0; 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_count) 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (info->tx_count && fifo_count) { 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get))); 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (c == 1) { 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get)); 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg16(info, CHA + TXFIFO, 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *((unsigned short*)(info->tx_buf + info->tx_get))); 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_count -= c; 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1); 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fifo_count -= c; 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_ASYNC) { 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_count < WAKEUP_CHARS) 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_TRANSMIT; 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_TXFIFO); 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_count) 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_TXFIFO); 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM); 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void cts_change(MGSLPC_INFO *info) 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHB, IRQ_CTS); 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.cts++; 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_CTS) 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->input_signal_events.cts_up++; 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->input_signal_events.cts_down++; 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->status_event_wait_q); 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->event_wait_q); 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->flags & ASYNC_CTS_FLOW) { 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tty->hw_stopped) { 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_CTS) { 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("CTS tx start..."); 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tty) 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tty->hw_stopped = 0; 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_start(info); 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_TRANSMIT; 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(info->serial_signals & SerialSignal_CTS)) { 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("CTS tx stop..."); 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tty) 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tty->hw_stopped = 1; 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_STATUS; 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void dcd_change(MGSLPC_INFO *info) 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHB, IRQ_DCD); 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.dcd++; 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_DCD) { 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->input_signal_events.dcd_up++; 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->input_signal_events.dcd_down++; 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->netcount) 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, info->netdev); 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->status_event_wait_q); 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->event_wait_q); 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->flags & ASYNC_CHECK_CD) { 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s CD now %s...", info->device_name, 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (info->serial_signals & SerialSignal_DCD) ? "on" : "off"); 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_DCD) 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->open_wait); 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("doing serial hangup..."); 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tty) 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_hangup(info->tty); 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_STATUS; 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void dsr_change(MGSLPC_INFO *info) 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port_irq_disable(info, PVR_DSR); 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.dsr++; 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_DSR) 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->input_signal_events.dsr_up++; 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->input_signal_events.dsr_down++; 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->status_event_wait_q); 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->event_wait_q); 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_STATUS; 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ri_change(MGSLPC_INFO *info) 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port_irq_disable(info, PVR_RI); 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.rng++; 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_RI) 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->input_signal_events.ri_up++; 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->input_signal_events.ri_down++; 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->status_event_wait_q); 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->event_wait_q); 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh |= BH_STATUS; 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Interrupt service routine entry point. 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments: 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * irq interrupt number that caused interrupt 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dev_id device ID supplied during interrupt registration 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * regs interrupted processor context 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs) 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO * info = (MGSLPC_INFO *)dev_id; 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short isr; 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char gis, pis; 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int count=0; 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("mgslpc_isr(%d) entry.\n", irq); 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info) 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(info->link.state & DEV_CONFIG)) 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&info->lock); 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while ((gis = read_reg(info, CHA + GIS))) { 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis); 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((gis & 0x70) || count > 1000) { 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("synclink_cs:hardware failed or ejected\n"); 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count++; 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gis & (BIT1 + BIT0)) { 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isr = read_reg16(info, CHB + ISR); 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isr & IRQ_DCD) 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dcd_change(info); 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isr & IRQ_CTS) 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cts_change(info); 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gis & (BIT3 + BIT2)) 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isr = read_reg16(info, CHA + ISR); 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isr & IRQ_TIMER) { 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->irq_occurred = 1; 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHA, IRQ_TIMER); 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* receive IRQs */ 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isr & IRQ_EXITHUNT) { 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.exithunt++; 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->event_wait_q); 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isr & IRQ_BREAK_ON) { 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.brk++; 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->flags & ASYNC_SAK) 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_SAK(info->tty); 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isr & IRQ_RXTIME) { 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_RXFIFO_READ); 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) { 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC) 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_ready_hdlc(info, isr & IRQ_RXEOM); 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_ready_async(info, isr & IRQ_RXEOM); 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* transmit IRQs */ 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isr & IRQ_UNDERRUN) { 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_aborting) 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.txabort++; 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.txunder++; 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_done(info); 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (isr & IRQ_ALLSENT) { 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.txok++; 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_done(info); 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (isr & IRQ_TXFIFO) 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_ready(info); 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gis & BIT7) { 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pis = read_reg(info, CHA + PIS); 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pis & BIT1) 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dsr_change(info); 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pis & BIT2) 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ri_change(info); 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Request bottom half processing if there's something 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for it to do and the bh is not already running 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->pending_bh && !info->bh_running && !info->bh_requested) { 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( debug_level >= DEBUG_LEVEL_ISR ) 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):%s queueing bh task.\n", 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name); 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule_work(&info->task); 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->bh_requested = 1; 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock(&info->lock); 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_isr(%d)exit.\n", 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,irq); 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Initialize and start device. 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int startup(MGSLPC_INFO * info) 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval = 0; 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name); 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->flags & ASYNC_INITIALIZED) 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_buf) { 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* allocate a page of memory for a transmit buffer */ 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_buf) { 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name); 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh = 0; 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1402a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum memset(&info->icount, 0, sizeof(info->icount)); 1403a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&info->tx_timer); 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_timer.data = (unsigned long)info; 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_timer.function = tx_timeout; 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allocate and claim adapter resources */ 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = claim_resources(info); 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* perform existance check and diagnostics */ 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( !retval ) 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = adapter_test(info); 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( retval ) { 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (capable(CAP_SYS_ADMIN) && info->tty) 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit(TTY_IO_ERROR, &info->tty->flags); 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds release_resources(info); 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* program hardware for current parameters */ 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_change_params(info); 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tty) 14261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(TTY_IO_ERROR, &info->tty->flags); 14271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags |= ASYNC_INITIALIZED; 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 14311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware 14341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void shutdown(MGSLPC_INFO * info) 14361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 14381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(info->flags & ASYNC_INITIALIZED)) 14401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_shutdown(%s)\n", 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear status wait queue because status changes */ 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* can't happen after shutting down the hardware */ 14481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->status_event_wait_q); 14491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->event_wait_q); 14501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_timer(&info->tx_timer); 14521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_buf) { 14541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_page((unsigned long) info->tx_buf); 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_buf = NULL; 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_stop(info); 14611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* TODO:disable interrupts instead of reset to preserve signal states */ 14641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reset_device(info); 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tty || info->tty->termios->c_cflag & HUPCL) { 14671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); 14681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds release_resources(info); 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tty) 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit(TTY_IO_ERROR, &info->tty->flags); 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags &= ~ASYNC_INITIALIZED; 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_program_hw(MGSLPC_INFO *info) 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_stop(info); 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_count = info->tx_put = info->tx_get = 0; 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC || info->netcount) 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc_mode(info); 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds async_mode(info); 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->dcd_chkcount = 0; 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->cts_chkcount = 0; 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->ri_chkcount = 0; 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->dsr_chkcount = 0; 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_enable(info, CHB, IRQ_DCD | IRQ_CTS); 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->netcount || info->tty->termios->c_cflag & CREAD) 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_start(info); 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Reconfigure adapter based on new parameters 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_change_params(MGSLPC_INFO *info) 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned cflag; 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bits_per_char; 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tty || !info->tty->termios) 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_change_params(%s)\n", 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cflag = info->tty->termios->c_cflag; 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if B0 rate (hangup) specified then negate DTR and RTS */ 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* otherwise assert DTR and RTS */ 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & CBAUD) 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* byte size and parity */ 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (cflag & CSIZE) { 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CS5: info->params.data_bits = 5; break; 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CS6: info->params.data_bits = 6; break; 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CS7: info->params.data_bits = 7; break; 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CS8: info->params.data_bits = 8; break; 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: info->params.data_bits = 7; break; 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & CSTOPB) 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.stop_bits = 2; 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.stop_bits = 1; 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.parity = ASYNC_PARITY_NONE; 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & PARENB) { 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & PARODD) 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.parity = ASYNC_PARITY_ODD; 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.parity = ASYNC_PARITY_EVEN; 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CMSPAR 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & CMSPAR) 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.parity = ASYNC_PARITY_SPACE; 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* calculate number of jiffies to transmit a full 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIFO (32 bytes) at specified data rate 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bits_per_char = info->params.data_bits + 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.stop_bits + 1; 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if port data rate is set to 460800 or less then 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * allow tty settings to override, otherwise keep the 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * current data rate. 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.data_rate <= 460800) { 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.data_rate = tty_get_baud_rate(info->tty); 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( info->params.data_rate ) { 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->timeout = (32*HZ*bits_per_char) / 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.data_rate; 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->timeout += HZ/50; /* Add .02 seconds of slop */ 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & CRTSCTS) 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags |= ASYNC_CTS_FLOW; 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags &= ~ASYNC_CTS_FLOW; 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & CLOCAL) 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags &= ~ASYNC_CHECK_CD; 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags |= ASYNC_CHECK_CD; 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* process tty input control flags */ 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->read_status_mask = 0; 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (I_INPCK(info->tty)) 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->read_status_mask |= BIT7 | BIT6; 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (I_IGNPAR(info->tty)) 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->ignore_status_mask |= BIT7 | BIT6; 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_program_hw(info); 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Add a character to the transmit buffer 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_put_char(struct tty_struct *tty, unsigned char ch) 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) { 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):mgslpc_put_char(%d) on %s\n", 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,ch,info->device_name); 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char")) 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!tty || !info->tx_buf) 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 16231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) { 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_count < TXBUFSIZE - 1) { 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_buf[info->tx_put++] = ch; 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_put &= TXBUFSIZE-1; 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_count++; 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Enable transmitter so remaining characters in the 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * transmit buffer are sent. 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_flush_chars(struct tty_struct *tty) 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n", 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name,info->tx_count); 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars")) 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_count <= 0 || tty->stopped || 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->hw_stopped || !info->tx_buf) 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n", 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name); 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_active) 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_start(info); 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Send a block of data 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments: 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tty pointer to tty information structure 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buf pointer to buffer containing send data 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * count size of send data in bytes 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns: number of characters written 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mgslpc_write(struct tty_struct * tty, 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const unsigned char *buf, int count) 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int c, ret = 0; 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):mgslpc_write(%s) count=%d\n", 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name,count); 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") || 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds !tty || !info->tx_buf) 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC) { 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > TXBUFSIZE) { 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -EIO; 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_active) 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (info->tx_count) 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto start; 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds c = min(count, 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min(TXBUFSIZE - info->tx_count - 1, 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds TXBUFSIZE - info->tx_put)); 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (c <= 0) 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(info->tx_buf + info->tx_put, buf, c); 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1); 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_count += c; 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += c; 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count -= c; 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += c; 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstart: 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_count && !tty->stopped && !tty->hw_stopped) { 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_active) 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_start(info); 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscleanup: 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):mgslpc_write(%s) returning=%d\n", 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name,ret); 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Return the count of free bytes in transmit buffer 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mgslpc_write_room(struct tty_struct *tty) 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room")) 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC) { 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* HDLC (frame oriented) mode */ 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_active) 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return HDLC_MAX_FRAME_SIZE; 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = TXBUFSIZE - info->tx_count - 1; 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret < 0) 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = 0; 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 17551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_write_room(%s)=%d\n", 17561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name, ret); 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Return the count of bytes in transmit buffer 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mgslpc_chars_in_buffer(struct tty_struct *tty) 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 17681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_chars_in_buffer(%s)\n", 17691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer")) 17721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 17731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC) 17751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = info->tx_active ? info->max_frame_size : 0; 17761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = info->tx_count; 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n", 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name, rc); 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Discard all data in the send buffer 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_flush_buffer(struct tty_struct *tty) 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_flush_buffer(%s) entry\n", 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer")) 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_count = info->tx_put = info->tx_get = 0; 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_timer(&info->tx_timer); 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&tty->write_wait); 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_wakeup(tty); 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Send a high-priority XON/XOFF character 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_send_xchar(struct tty_struct *tty, char ch) 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_send_xchar(%s,%d)\n", 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name, ch ); 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar")) 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->x_char = ch; 18241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ch) { 18251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 18261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_enabled) 18271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_start(info); 18281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 18291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Signal remote device to throttle send data (our receive data) 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_throttle(struct tty_struct * tty) 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_throttle(%s) entry\n", 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 18421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle")) 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (I_IXOFF(tty)) 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_send_xchar(tty, STOP_CHAR(tty)); 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty->termios->c_cflag & CRTSCTS) { 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals &= ~SerialSignal_RTS; 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Signal remote device to stop throttling send data (our receive data) 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_unthrottle(struct tty_struct * tty) 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 18651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_unthrottle(%s) entry\n", 18661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 18671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle")) 18691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 18701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (I_IXOFF(tty)) { 18721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->x_char) 18731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->x_char = 0; 18741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 18751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_send_xchar(tty, START_CHAR(tty)); 18761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty->termios->c_cflag & CRTSCTS) { 18791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 18801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_RTS; 18811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 18821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 18831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* get the current serial statistics 18871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount) 18891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 18911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 18921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("get_params(%s)\n", info->device_name); 1893a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum if (!user_icount) { 1894a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum memset(&info->icount, 0, sizeof(info->icount)); 1895a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum } else { 1896a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); 1897a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum if (err) 1898a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum return -EFAULT; 1899a7482a2e7775d163aecd8c95af7bb1b8c83890ccPaul Fulghum } 19001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 19011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* get the current serial parameters 19041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params) 19061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("get_params(%s)\n", info->device_name); 19101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 19121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 19131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* set the serial parameters 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments: 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * info pointer to device instance data 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * new_params user buffer containing new serial params 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns: 0 if success, otherwise error code 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params) 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 19281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSL_PARAMS tmp_params; 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):set_params %s\n", __FILE__,__LINE__, 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->device_name ); 19341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); 19351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) { 19361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( debug_level >= DEBUG_LEVEL_INFO ) 19371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):set_params(%s) user buffer copy failed\n", 19381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name); 19391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 19401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 19431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); 19441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 19451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_change_params(info); 19471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 19491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_txidle(MGSLPC_INFO * info, int __user *idle_mode) 19521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 19541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 19551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode); 19561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); 19571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 19581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 19591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 19601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_txidle(MGSLPC_INFO * info, int idle_mode) 19631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 19651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 19661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("set_txidle(%s,%d)\n", info->device_name, idle_mode); 19671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 19681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->idle_mode = idle_mode; 19691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_set_idle(info); 19701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 19711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 19721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_interface(MGSLPC_INFO * info, int __user *if_mode) 19751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 19771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 19781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("get_interface(%s)=%d\n", info->device_name, info->if_mode); 19791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int)); 19801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (err) 19811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 19821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 19831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_interface(MGSLPC_INFO * info, int if_mode) 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 19881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char val; 19891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 19901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("set_interface(%s,%d)\n", info->device_name, if_mode); 19911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 19921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->if_mode = if_mode; 19931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = read_reg(info, PVR) & 0x0f; 19951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (info->if_mode) 19961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 19971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_INTERFACE_RS232: val |= PVR_RS232; break; 19981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_INTERFACE_V35: val |= PVR_V35; break; 19991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_INTERFACE_RS422: val |= PVR_RS422; break; 20001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, PVR, val); 20021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 20041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 20051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_txenable(MGSLPC_INFO * info, int enable) 20081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 20101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 20121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("set_txenable(%s,%d)\n", info->device_name, enable); 20131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 20151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (enable) { 20161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_enabled) 20171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_start(info); 20181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 20191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_enabled) 20201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 20211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 20231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 20241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int tx_abort(MGSLPC_INFO * info) 20271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 20291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 20311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("tx_abort(%s)\n", info->device_name); 20321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 20341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_active && info->tx_count && 20351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.mode == MGSL_MODE_HDLC) { 20361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear data count so FIFO is not filled on next IRQ. 20371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This results in underrun and abort transmission. 20381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_count = info->tx_put = info->tx_get = 0; 20401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_aborting = TRUE; 20411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 20431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 20441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_rxenable(MGSLPC_INFO * info, int enable) 20471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 20491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 20511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("set_rxenable(%s,%d)\n", info->device_name, enable); 20521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 20541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (enable) { 20551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->rx_enabled) 20561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_start(info); 20571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 20581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->rx_enabled) 20591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_stop(info); 20601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 20621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 20631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait for specified event to occur 20661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments: info pointer to device instance data 20681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mask pointer to bitmask of events to wait for 20691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return Value: 0 if successful and bit mask updated with 20701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of events triggerred, 20711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * otherwise error code 20721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wait_events(MGSLPC_INFO * info, int __user *mask_ptr) 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 20761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int s; 20771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc=0; 20781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mgsl_icount cprev, cnow; 20791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int events; 20801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int mask; 20811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct _input_signal_events oldsigs, newsigs; 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 20831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); 20851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 20891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("wait_events(%s,%d)\n", info->device_name, mask); 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 20921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* return immediately if state matches requested events */ 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds s = info->serial_signals; 20961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds events = mask & 20971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + 20991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + 21001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); 21011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (events) { 21021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 21031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto exit; 21041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* save current irq counts */ 21071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cprev = info->icount; 21081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds oldsigs = info->input_signal_events; 21091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((info->params.mode == MGSL_MODE_HDLC) && 21111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (mask & MgslEvent_ExitHuntMode)) 21121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_enable(info, CHA, IRQ_EXITHUNT); 21131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 21151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&info->event_wait_q, &wait); 21161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 21181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for(;;) { 21211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 21221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) { 21231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ERESTARTSYS; 21241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 21251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* get current irq counts */ 21281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 21291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cnow = info->icount; 21301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds newsigs = info->input_signal_events; 21311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 21331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if no change, wait aborted for some reason */ 21351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (newsigs.dsr_up == oldsigs.dsr_up && 21361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds newsigs.dsr_down == oldsigs.dsr_down && 21371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds newsigs.dcd_up == oldsigs.dcd_up && 21381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds newsigs.dcd_down == oldsigs.dcd_down && 21391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds newsigs.cts_up == oldsigs.cts_up && 21401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds newsigs.cts_down == oldsigs.cts_down && 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds newsigs.ri_up == oldsigs.ri_up && 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds newsigs.ri_down == oldsigs.ri_down && 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cnow.exithunt == cprev.exithunt && 21441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cnow.rxidle == cprev.rxidle) { 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EIO; 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds events = mask & 21501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + 21511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + 21521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + 21531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + 21541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + 21551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + 21561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + 21581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + 21591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); 21601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (events) 21611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 21621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cprev = cnow; 21641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds oldsigs = newsigs; 21651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&info->event_wait_q, &wait); 21681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 21691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mask & MgslEvent_ExitHuntMode) { 21711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 21721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!waitqueue_active(&info->event_wait_q)) 21731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHA, IRQ_EXITHUNT); 21741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 21751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsexit: 21771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc == 0) 21781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(rc, events, mask_ptr); 21791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 21801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 21811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int modem_input_wait(MGSLPC_INFO *info,int arg) 21831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 21851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 21861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mgsl_icount cprev, cnow; 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* save current irq counts */ 21901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 21911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cprev = info->icount; 21921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&info->status_event_wait_q, &wait); 21931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 21941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 21951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for(;;) { 21971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) { 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ERESTARTSYS; 22001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 22011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* get new irq counts */ 22041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 22051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cnow = info->icount; 22061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if no change, wait aborted for some reason */ 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { 22121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EIO; 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 22141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* check for change in caller specified modem input */ 22171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || 22181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || 22191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || 22201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { 22211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 22221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 22231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cprev = cnow; 22261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&info->status_event_wait_q, &wait); 22281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 22291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 22301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* return the state of the serial control and status signals 22331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 22341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int tiocmget(struct tty_struct *tty, struct file *file) 22351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 22371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int result; 22381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 22391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 22411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 22421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 22431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + 22451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + 22461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + 22471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + 22481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + 22491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); 22501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 22521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):%s tiocmget() value=%08X\n", 22531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name, result ); 22541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return result; 22551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* set modem control signals (DTR/RTS) 22581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 22591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int tiocmset(struct tty_struct *tty, struct file *file, 22601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int set, unsigned int clear) 22611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 22631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 22641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 22661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):%s tiocmset(%x,%x)\n", 22671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name, set, clear); 22681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (set & TIOCM_RTS) 22701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_RTS; 22711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (set & TIOCM_DTR) 22721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_DTR; 22731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (clear & TIOCM_RTS) 22741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals &= ~SerialSignal_RTS; 22751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (clear & TIOCM_DTR) 22761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals &= ~SerialSignal_DTR; 22771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 22791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 22801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 22811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 22831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Set or clear transmit break condition 22861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 22871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments: tty pointer to tty instance data 22881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * break_state -1=set break condition, 0=clear 22891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 22901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_break(struct tty_struct *tty, int break_state) 22911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; 22931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 22941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 22961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_break(%s,%d)\n", 22971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name, break_state); 22981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break")) 23001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 23011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 23031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (break_state == -1) 23041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_reg_bits(info, CHA+DAFO, BIT6); 23051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 23061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_reg_bits(info, CHA+DAFO, BIT6); 23071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 23081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 23091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Service an IOCTL request 23111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 23121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments: 23131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 23141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tty pointer to tty instance data 23151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * file pointer to associated file object for device 23161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cmd IOCTL command code 23171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * arg command argument/context 23181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 23191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return Value: 0 if success, otherwise error code 23201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 23211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mgslpc_ioctl(struct tty_struct *tty, struct file * file, 23221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int cmd, unsigned long arg) 23231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; 23251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 23271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__, 23281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->device_name, cmd ); 23291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl")) 23311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 23321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && 23341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { 23351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty->flags & (1 << TTY_IO_ERROR)) 23361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 23371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ioctl_common(info, cmd, arg); 23401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 23411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg) 23431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int error; 23451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct mgsl_icount cnow; /* kernel counter temps */ 23461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct serial_icounter_struct __user *p_cuser; /* user space */ 23471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void __user *argp = (void __user *)arg; 23481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 23491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (cmd) { 23511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCGPARAMS: 23521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return get_params(info, argp); 23531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCSPARAMS: 23541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return set_params(info, argp); 23551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCGTXIDLE: 23561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return get_txidle(info, argp); 23571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCSTXIDLE: 23581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return set_txidle(info, (int)arg); 23591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCGIF: 23601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return get_interface(info, argp); 23611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCSIF: 23621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return set_interface(info,(int)arg); 23631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCTXENABLE: 23641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return set_txenable(info,(int)arg); 23651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCRXENABLE: 23661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return set_rxenable(info,(int)arg); 23671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCTXABORT: 23681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tx_abort(info); 23691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCGSTATS: 23701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return get_stats(info, argp); 23711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case MGSL_IOCWAITEVENT: 23721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return wait_events(info, argp); 23731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TIOCMIWAIT: 23741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return modem_input_wait(info,(int)arg); 23751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TIOCGICOUNT: 23761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 23771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cnow = info->icount; 23781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 23791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p_cuser = argp; 23801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.cts, &p_cuser->cts); 23811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.dsr, &p_cuser->dsr); 23831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.rng, &p_cuser->rng); 23851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.dcd, &p_cuser->dcd); 23871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.rx, &p_cuser->rx); 23891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.tx, &p_cuser->tx); 23911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.frame, &p_cuser->frame); 23931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.overrun, &p_cuser->overrun); 23951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.parity, &p_cuser->parity); 23971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 23981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.brk, &p_cuser->brk); 23991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 24001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun); 24011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) return error; 24021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 24031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 24041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOIOCTLCMD; 24051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 24071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 24081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Set new termios settings 24101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 24111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments: 24121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 24131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tty pointer to tty structure 24141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * termios pointer to buffer to hold returned old termios 24151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 24161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_set_termios(struct tty_struct *tty, struct termios *old_termios) 24171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 24181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; 24191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 24201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 24221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__, 24231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->driver->name ); 24241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* just return if nothing has changed */ 24261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((tty->termios->c_cflag == old_termios->c_cflag) 24271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && (RELEVANT_IFLAG(tty->termios->c_iflag) 24281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds == RELEVANT_IFLAG(old_termios->c_iflag))) 24291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 24301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_change_params(info); 24321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Handle transition to B0 status */ 24341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old_termios->c_cflag & CBAUD && 24351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds !(tty->termios->c_cflag & CBAUD)) { 24361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); 24371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 24381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 24391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 24401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Handle transition away from B0 status */ 24431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(old_termios->c_cflag & CBAUD) && 24441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->termios->c_cflag & CBAUD) { 24451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_DTR; 24461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(tty->termios->c_cflag & CRTSCTS) || 24471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds !test_bit(TTY_THROTTLED, &tty->flags)) { 24481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_RTS; 24491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 24511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 24521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 24531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Handle turning off CRTSCTS */ 24561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old_termios->c_cflag & CRTSCTS && 24571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds !(tty->termios->c_cflag & CRTSCTS)) { 24581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->hw_stopped = 0; 24591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_release(tty); 24601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 24621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_close(struct tty_struct *tty, struct file * filp) 24641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 24651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; 24661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close")) 24681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 24691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 24711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", 24721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name, info->count); 24731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->count) 24751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 24761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty_hung_up_p(filp)) 24781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 24791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((tty->count == 1) && (info->count != 1)) { 24811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 24821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tty->count is 1 and the tty structure will be freed. 24831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * info->count should be one in this case. 24841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if it's not, correct it so that the port is shutdown. 24851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 24861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("mgslpc_close: bad refcount; tty->count is 1, " 24871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "info->count is %d\n", info->count); 24881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->count = 1; 24891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->count--; 24921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if at least one open remaining, leave hardware active */ 24941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->count) 24951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 24961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags |= ASYNC_CLOSING; 24981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* set tty->closing to notify line discipline to 25001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only process XON/XOFF characters. Only the N_TTY 25011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * discipline appears to use this (ppp does not). 25021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 25031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->closing = 1; 25041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wait for transmit data to clear all layers */ 25061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) { 25081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 25091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n", 25101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 25111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_wait_until_sent(tty, info->closing_wait); 25121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->flags & ASYNC_INITIALIZED) 25151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_wait_until_sent(tty, info->timeout); 25161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty->driver->flush_buffer) 25181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->driver->flush_buffer(tty); 25191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ldisc_flush_buffer(tty); 25211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds shutdown(info); 25231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->closing = 0; 25251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tty = NULL; 25261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->blocked_open) { 25281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->close_delay) { 25291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep_interruptible(jiffies_to_msecs(info->close_delay)); 25301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->open_wait); 25321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); 25351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->close_wait); 25371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscleanup: 25391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 25401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__, 25411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->driver->name, info->count); 25421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 25431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Wait until the transmitter is empty. 25451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 25461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout) 25471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; 25491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long orig_jiffies, char_time; 25501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info ) 25521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 25531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 25551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n", 25561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 25571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent")) 25591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 25601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(info->flags & ASYNC_INITIALIZED)) 25621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto exit; 25631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds orig_jiffies = jiffies; 25651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set check interval to 1/5 of estimated time to 25671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * send a character, and make it at least 1. The check 25681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * interval should also be less than the timeout. 25691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: use tight timings here to satisfy the NIST-PCTS. 25701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 25711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( info->params.data_rate ) { 25731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char_time = info->timeout/(32 * 5); 25741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!char_time) 25751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char_time++; 25761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 25771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char_time = 1; 25781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (timeout) 25801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char_time = min_t(unsigned long, char_time, timeout); 25811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC) { 25831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (info->tx_active) { 25841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep_interruptible(jiffies_to_msecs(char_time)); 25851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 25861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 25871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (timeout && time_after(jiffies, orig_jiffies + timeout)) 25881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 25891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 25911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while ((info->tx_count || info->tx_active) && 25921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_enabled) { 25931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep_interruptible(jiffies_to_msecs(char_time)); 25941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 25951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 25961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (timeout && time_after(jiffies, orig_jiffies + timeout)) 25971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 25981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsexit: 26021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 26031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n", 26041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 26051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 26061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Called by tty_hangup() when a hangup is signaled. 26081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is the same as closing all open files for the port. 26091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 26101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_hangup(struct tty_struct *tty) 26111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; 26131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 26151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_hangup(%s)\n", 26161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 26171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup")) 26191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 26201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_flush_buffer(tty); 26221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds shutdown(info); 26231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->count = 0; 26251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags &= ~ASYNC_NORMAL_ACTIVE; 26261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tty = NULL; 26271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible(&info->open_wait); 26291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 26301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Block the current process until the specified port 26321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is ready to be opened. 26331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 26341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int block_til_ready(struct tty_struct *tty, struct file *filp, 26351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info) 26361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 26381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 26391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int do_clocal = 0, extra_count = 0; 26401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 26411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 26431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):block_til_ready on %s\n", 26441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, tty->driver->name ); 26451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ 26471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* nonblock mode is set or port is not enabled */ 26481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* just verify that callout device is not active */ 26491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags |= ASYNC_NORMAL_ACTIVE; 26501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 26511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty->termios->c_cflag & CLOCAL) 26541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_clocal = 1; 26551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for carrier detect and the line to become 26571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * free (i.e., not in use by the callout). While we are in 26581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this loop, info->count is dropped by one, so that 26591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mgslpc_close() knows when to free things. We restore it upon 26601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exit, either normal or abnormal. 26611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 26621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = 0; 26641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&info->open_wait, &wait); 26651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 26671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):block_til_ready before block on %s count=%d\n", 26681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, tty->driver->name, info->count ); 26691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock, flags); 26711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!tty_hung_up_p(filp)) { 26721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds extra_count = 1; 26731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->count--; 26741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock, flags); 26761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->blocked_open++; 26771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (1) { 26791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((tty->termios->c_cflag & CBAUD)) { 26801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 26811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; 26821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 26831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 26841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 26871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){ 26891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = (info->flags & ASYNC_HUP_NOTIFY) ? 26901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds -EAGAIN : -ERESTARTSYS; 26911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 26921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 26951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 26961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 26971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(info->flags & ASYNC_CLOSING) && 26991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) { 27001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) { 27041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -ERESTARTSYS; 27051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 27091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):block_til_ready blocking on %s count=%d\n", 27101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, tty->driver->name, info->count ); 27111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 27131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 27161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&info->open_wait, &wait); 27171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (extra_count) 27191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->count++; 27201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->blocked_open--; 27211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 27231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):block_til_ready after blocking on %s count=%d\n", 27241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, tty->driver->name, info->count ); 27251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!retval) 27271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->flags |= ASYNC_NORMAL_ACTIVE; 27281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 27301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 27311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mgslpc_open(struct tty_struct *tty, struct file * filp) 27331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 27341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info; 27351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval, line; 27361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 27371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* verify range of specified line number */ 27391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds line = tty->index; 27401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((line < 0) || (line >= mgslpc_device_count)) { 27411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_open with invalid line #%d.\n", 27421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,line); 27431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 27441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* find the info structure for the specified line */ 27471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info = mgslpc_device_list; 27481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(info && info->line != line) 27491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info = info->next_device; 27501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open")) 27511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 27521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty->driver_data = info; 27541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tty = tty; 27551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 27571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", 27581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,tty->driver->name, info->count); 27591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If port is closing, signal caller to try again */ 27611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){ 27621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->flags & ASYNC_CLOSING) 27631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds interruptible_sleep_on(&info->close_wait); 27641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = ((info->flags & ASYNC_HUP_NOTIFY) ? 27651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds -EAGAIN : -ERESTARTSYS); 27661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 27671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 27701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->netlock, flags); 27721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->netcount) { 27731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EBUSY; 27741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->netlock, flags); 27751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 27761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->count++; 27781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->netlock, flags); 27791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->count == 1) { 27811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1st open on this device, init hardware */ 27821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = startup(info); 27831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval < 0) 27841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 27851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = block_til_ready(tty, filp, info); 27881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 27891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 27901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):block_til_ready(%s) returned %d\n", 27911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name, retval); 27921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 27931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 27961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):mgslpc_open(%s) success\n", 27971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name); 27981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = 0; 27991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscleanup: 28011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 28021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty->count == 1) 28031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tty = NULL; /* tty layer will release tty struct */ 28041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(info->count) 28051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->count--; 28061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 28071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 28091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 28101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 28121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * /proc fs routines.... 28131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 28141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int line_info(char *buf, MGSLPC_INFO *info) 28161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 28171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char stat_buf[30]; 28181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret; 28191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 28201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = sprintf(buf, "%s:io:%04X irq:%d", 28221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->device_name, info->io_base, info->irq_level); 28231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* output current serial signal states */ 28251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 28261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 28271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 28281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stat_buf[0] = 0; 28301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stat_buf[1] = 0; 28311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_RTS) 28321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strcat(stat_buf, "|RTS"); 28331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_CTS) 28341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strcat(stat_buf, "|CTS"); 28351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_DTR) 28361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strcat(stat_buf, "|DTR"); 28371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_DSR) 28381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strcat(stat_buf, "|DSR"); 28391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_DCD) 28401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strcat(stat_buf, "|CD"); 28411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_RI) 28421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strcat(stat_buf, "|RI"); 28431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC) { 28451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d", 28461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.txok, info->icount.rxok); 28471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.txunder) 28481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder); 28491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.txabort) 28501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort); 28511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.rxshort) 28521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort); 28531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.rxlong) 28541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong); 28551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.rxover) 28561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover); 28571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.rxcrc) 28581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc); 28591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 28601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d", 28611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.tx, info->icount.rx); 28621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.frame) 28631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " fe:%d", info->icount.frame); 28641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.parity) 28651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " pe:%d", info->icount.parity); 28661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.brk) 28671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " brk:%d", info->icount.brk); 28681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->icount.overrun) 28691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " oe:%d", info->icount.overrun); 28701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 28711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Append serial signal status to end */ 28731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, " %s\n", stat_buf+1); 28741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", 28761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_active,info->bh_requested,info->bh_running, 28771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->pending_bh); 28781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 28801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 28811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Called to print information about devices 28831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 28841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int mgslpc_read_proc(char *page, char **start, off_t off, int count, 28851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int *eof, void *data) 28861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 28871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len = 0, l; 28881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds off_t begin = 0; 28891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info; 28901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len += sprintf(page, "synclink driver:%s\n", driver_version); 28921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info = mgslpc_device_list; 28941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while( info ) { 28951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = line_info(page + len, info); 28961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len += l; 28971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len+begin > off+count) 28981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 28991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len+begin < off) { 29001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds begin += len; 29011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 29021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info = info->next_device; 29041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *eof = 1; 29071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 29081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (off >= len+begin) 29091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 29101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *start = page + (off-begin); 29111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ((count < begin+len-off) ? count : begin+len-off); 29121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 29131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint rx_alloc_buffers(MGSLPC_INFO *info) 29151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 29161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* each buffer has header and data */ 29171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size; 29181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* calculate total allocation size for 8 buffers */ 29201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_buf_total_size = info->rx_buf_size * 8; 29211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* limit total allocated memory */ 29231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->rx_buf_total_size > 0x10000) 29241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_buf_total_size = 0x10000; 29251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* calculate number of buffers */ 29271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size; 29281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL); 29301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->rx_buf == NULL) 29311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 29321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_reset_buffers(info); 29341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 29351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 29361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid rx_free_buffers(MGSLPC_INFO *info) 29381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2939735d5661d5c5f023a78fbe68e771e261040ff1b7Jesper Juhl kfree(info->rx_buf); 29401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_buf = NULL; 29411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 29421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint claim_resources(MGSLPC_INFO *info) 29441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 29451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rx_alloc_buffers(info) < 0 ) { 29461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "Cant allocate rx buffer %s\n", info->device_name); 29471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds release_resources(info); 29481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 29491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 29511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 29521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid release_resources(MGSLPC_INFO *info) 29541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 29551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 29561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("release_resources(%s)\n", info->device_name); 29571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_free_buffers(info); 29581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 29591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Add the specified device instance data structure to the 29611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * global linked list of devices and increment the device count. 29621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 29631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Arguments: info pointer to device instance data 29641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 29651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mgslpc_add_device(MGSLPC_INFO *info) 29661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 29671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->next_device = NULL; 29681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->line = mgslpc_device_count; 29691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(info->device_name,"ttySLP%d",info->line); 29701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->line < MAX_DEVICE_COUNT) { 29721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (maxframe[info->line]) 29731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->max_frame_size = maxframe[info->line]; 29741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->dosyncppp = dosyncppp[info->line]; 29751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_device_count++; 29781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!mgslpc_device_list) 29801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_device_list = info; 29811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 29821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *current_dev = mgslpc_device_list; 29831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while( current_dev->next_device ) 29841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current_dev = current_dev->next_device; 29851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current_dev->next_device = info; 29861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->max_frame_size < 4096) 29891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->max_frame_size = 4096; 29901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (info->max_frame_size > 65535) 29911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->max_frame_size = 65535; 29921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n", 29941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->device_name, info->io_base, info->irq_level); 29951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 29971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlcdev_init(info); 29981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 29991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid mgslpc_remove_device(MGSLPC_INFO *remove_info) 30021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = mgslpc_device_list; 30041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *last = NULL; 30051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(info) { 30071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info == remove_info) { 30081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (last) 30091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds last->next_device = info->next_device; 30101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 30111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_device_list = info->next_device; 30121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 30131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlcdev_exit(info); 30141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 30151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds release_resources(info); 30161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(info); 30171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_device_count--; 30181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 30191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 30201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds last = info; 30211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info = info->next_device; 30221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 30231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30254af48c8c16dfc37400f63633373dd180b5540eadDominik Brodowskistatic struct pcmcia_device_id mgslpc_ids[] = { 30264af48c8c16dfc37400f63633373dd180b5540eadDominik Brodowski PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050), 30274af48c8c16dfc37400f63633373dd180b5540eadDominik Brodowski PCMCIA_DEVICE_NULL 30284af48c8c16dfc37400f63633373dd180b5540eadDominik Brodowski}; 30294af48c8c16dfc37400f63633373dd180b5540eadDominik BrodowskiMODULE_DEVICE_TABLE(pcmcia, mgslpc_ids); 30304af48c8c16dfc37400f63633373dd180b5540eadDominik Brodowski 30311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct pcmcia_driver mgslpc_driver = { 30321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 30331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .drv = { 30341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "synclink_cs", 30351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }, 3036f8cfa618dccbdc6dab5297f75779566a388a98fdDominik Brodowski .probe = mgslpc_attach, 3037cc3b4866bee996c922e875b8c8efe9f0d8803aaeDominik Brodowski .remove = mgslpc_detach, 30384af48c8c16dfc37400f63633373dd180b5540eadDominik Brodowski .id_table = mgslpc_ids, 303998e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski .suspend = mgslpc_suspend, 304098e4c28b7ec390c2dad6a4c69d69629c0f7e8b10Dominik Brodowski .resume = mgslpc_resume, 30411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 30421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct tty_operations mgslpc_ops = { 30441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .open = mgslpc_open, 30451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .close = mgslpc_close, 30461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write = mgslpc_write, 30471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .put_char = mgslpc_put_char, 30481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .flush_chars = mgslpc_flush_chars, 30491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write_room = mgslpc_write_room, 30501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .chars_in_buffer = mgslpc_chars_in_buffer, 30511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .flush_buffer = mgslpc_flush_buffer, 30521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .ioctl = mgslpc_ioctl, 30531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .throttle = mgslpc_throttle, 30541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .unthrottle = mgslpc_unthrottle, 30551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .send_xchar = mgslpc_send_xchar, 30561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .break_ctl = mgslpc_break, 30571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wait_until_sent = mgslpc_wait_until_sent, 30581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .read_proc = mgslpc_read_proc, 30591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .set_termios = mgslpc_set_termios, 30601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .stop = tx_pause, 30611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .start = tx_release, 30621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .hangup = mgslpc_hangup, 30631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .tiocmget = tiocmget, 30641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .tiocmset = tiocmset, 30651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 30661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void synclink_cs_cleanup(void) 30681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 30701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("Unloading %s: version %s\n", driver_name, driver_version); 30721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(mgslpc_device_list) 30741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_remove_device(mgslpc_device_list); 30751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (serial_driver) { 30771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = tty_unregister_driver(serial_driver))) 30781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d) failed to unregister tty driver err=%d\n", 30791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,rc); 30801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_tty_driver(serial_driver); 30811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 30821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pcmcia_unregister_driver(&mgslpc_driver); 30841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init synclink_cs_init(void) 30871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 30891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (break_on_load) { 30911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_get_text_ptr(); 30921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BREAKPOINT(); 30931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 30941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s %s\n", driver_name, driver_version); 30961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = pcmcia_register_driver(&mgslpc_driver)) < 0) 30981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 30991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT); 31011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!serial_driver) { 31021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ENOMEM; 31031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 31041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Initialize the tty_driver structure */ 31071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->owner = THIS_MODULE; 31091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->driver_name = "synclink_cs"; 31101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->name = "ttySLP"; 31111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->major = ttymajor; 31121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->minor_start = 64; 31131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->type = TTY_DRIVER_TYPE_SERIAL; 31141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->subtype = SERIAL_TYPE_NORMAL; 31151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->init_termios = tty_std_termios; 31161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->init_termios.c_cflag = 31171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds B9600 | CS8 | CREAD | HUPCL | CLOCAL; 31181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->flags = TTY_DRIVER_REAL_RAW; 31191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_set_operations(serial_driver, &mgslpc_ops); 31201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = tty_register_driver(serial_driver)) < 0) { 31221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):Couldn't register serial driver\n", 31231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__); 31241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_tty_driver(serial_driver); 31251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver = NULL; 31261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 31271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s %s, tty major#%d\n", 31301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds driver_name, driver_version, 31311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds serial_driver->major); 31321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 31341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 31361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds synclink_cs_cleanup(); 31371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 31381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 31391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit synclink_cs_exit(void) 31411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 31421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds synclink_cs_cleanup(); 31431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 31441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(synclink_cs_init); 31461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(synclink_cs_exit); 31471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate) 31491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 31501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int M, N; 31511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char val; 31521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* note:standard BRG mode is broken in V3.2 chip 31541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * so enhanced mode is always used 31551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 31561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rate) { 31581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds N = 3686400 / rate; 31591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!N) 31601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds N = 1; 31611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds N >>= 1; 31621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (M = 1; N > 64 && M < 16; M++) 31631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds N >>= 1; 31641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds N--; 31651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* BGR[5..0] = N 31671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BGR[9..6] = M 31681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BGR[7..0] contained in BGR register 31691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BGR[9..8] contained in CCR2[7..6] 31701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * divisor = (N+1)*2^M 31711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 31721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: M *must* not be zero (causes asymetric duty cycle) 31731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 31741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, (unsigned char) (channel + BGR), 31751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned char) ((M << 6) + N)); 31761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f; 31771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= ((M << 4) & 0xc0); 31781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, (unsigned char) (channel + CCR2), val); 31791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 31811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Enabled the AUX clock output at the specified frequency. 31831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 31841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void enable_auxclk(MGSLPC_INFO *info) 31851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 31861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char val; 31871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* MODE 31891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 31901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..06 MDS[1..0] 10 = transparent HDLC mode 31911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 ADM Address Mode, 0 = no addr recognition 31921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 TMD Timer Mode, 0 = external 31931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 RAC Receiver Active, 0 = inactive 31941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RTS 0=RTS active during xmit, 1=RTS always active 31951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 TRS Timer Resolution, 1=512 31961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 TLP Test Loop, 0 = no loop 31971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 31981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1000 0010 31991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 32001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x82; 32011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* channel B RTS is used to enable AUXCLK driver on SP505 */ 32031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) 32041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT2; 32051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHB + MODE, val); 32061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR0 32081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 PU Power Up, 1=active, 0=power down 32101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 MCE Master Clock Enable, 1=enabled 32111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 Reserved, 0 32121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04..02 SC[2..0] Encoding 32131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01..00 SM[1..0] Serial Mode, 00=HDLC 32141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 11000000 32161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 32171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHB + CCR0, 0xc0); 32181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR1 32201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 SFLG Shared Flag, 0 = disable shared flags 32221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 GALP Go Active On Loop, 0 = not used 32231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 GLP Go On Loop, 0 = not used 32241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 ODS Output Driver Select, 1=TxD is push-pull output 32251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 ITF Interframe Time Fill, 0=mark, 1=flag 32261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02..00 CM[2..0] Clock Mode 32271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0001 0111 32291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 32301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHB + CCR1, 0x17); 32311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR2 (Channel B) 32331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..06 BGR[9..8] Baud rate bits 9..8 32351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value 32361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 SSEL Clock source select, 1=submode b 32371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 TOE 0=TxCLK is input, 1=TxCLK is output 32381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RWX Read/Write Exchange 0=disabled 32391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 32401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 DIV, data inversion 0=disabled, 1=enabled 32411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0011 1000 32431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 32441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) 32451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHB + CCR2, 0x38); 32461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 32471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHB + CCR2, 0x30); 32481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR4 32501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 MCK4 Master Clock Divide by 4, 1=enabled 32521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled 32531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 TST1 Test Pin, 0=normal operation 32541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 ICD Ivert Carrier Detect, 1=enabled (active low) 32551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03..02 Reserved, must be 0 32561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes 32571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0101 0000 32591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 32601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHB + CCR4, 0x50); 32611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if auxclk not enabled, set internal BRG so 32631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CTS transitions can be detected (requires TxC) 32641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 32651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) 32661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_set_rate(info, CHB, info->params.clock_speed); 32671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 32681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_set_rate(info, CHB, 921600); 32691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 32701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void loopback_enable(MGSLPC_INFO *info) 32721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 32731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char val; 32741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */ 32761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0); 32771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR1, val); 32781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR2:04 SSEL Clock source select, 1=submode b */ 32801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5); 32811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR2, val); 32821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* set LinkSpeed if available, otherwise default to 2Mbps */ 32841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.clock_speed) 32851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_set_rate(info, CHA, info->params.clock_speed); 32861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 32871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_set_rate(info, CHA, 1843200); 32881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* MODE:00 TLP Test Loop, 1=loopback enabled */ 32901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = read_reg(info, CHA + MODE) | BIT0; 32911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + MODE, val); 32921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 32931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid hdlc_mode(MGSLPC_INFO *info) 32951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 32961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char val; 32971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char clkmode, clksubmode; 32981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* disable all interrupts */ 33001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHA, 0xffff); 33011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHB, 0xffff); 33021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port_irq_disable(info, 0xff); 33031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* assume clock mode 0a, rcv=RxC xmt=TxC */ 33051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clkmode = clksubmode = 0; 33061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_RXC_DPLL 33071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && info->params.flags & HDLC_FLAG_TXC_DPLL) { 33081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clock mode 7a, rcv = DPLL, xmt = DPLL */ 33091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clkmode = 7; 33101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (info->params.flags & HDLC_FLAG_RXC_BRG 33111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && info->params.flags & HDLC_FLAG_TXC_BRG) { 33121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clock mode 7b, rcv = BRG, xmt = BRG */ 33131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clkmode = 7; 33141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clksubmode = 1; 33151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) { 33161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_TXC_BRG) { 33171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */ 33181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clkmode = 6; 33191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clksubmode = 1; 33201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 33211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clock mode 6a, rcv = DPLL, xmt = TxC */ 33221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clkmode = 6; 33231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (info->params.flags & HDLC_FLAG_TXC_BRG) { 33251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clock mode 0b, rcv = RxC, xmt = BRG */ 33261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clksubmode = 1; 33271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* MODE 33301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 33311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..06 MDS[1..0] 10 = transparent HDLC mode 33321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 ADM Address Mode, 0 = no addr recognition 33331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 TMD Timer Mode, 0 = external 33341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 RAC Receiver Active, 0 = inactive 33351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RTS 0=RTS active during xmit, 1=RTS always active 33361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 TRS Timer Resolution, 1=512 33371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 TLP Test Loop, 0 = no loop 33381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 33391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1000 0010 33401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 33411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x82; 33421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.loopback) 33431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT0; 33441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* preserve RTS state */ 33461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_RTS) 33471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT2; 33481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + MODE, val); 33491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR0 33511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 33521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 PU Power Up, 1=active, 0=power down 33531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 MCE Master Clock Enable, 1=enabled 33541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 Reserved, 0 33551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04..02 SC[2..0] Encoding 33561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01..00 SM[1..0] Serial Mode, 00=HDLC 33571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 33581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 11000000 33591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 33601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0xc0; 33611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (info->params.encoding) 33621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 33631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_ENCODING_NRZI: 33641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT3; 33651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_ENCODING_BIPHASE_SPACE: 33671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT4; 33681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // FM0 33691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_ENCODING_BIPHASE_MARK: 33701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT4 + BIT2; 33711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // FM1 33721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_ENCODING_BIPHASE_LEVEL: 33731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT4 + BIT3; 33741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // Manchester 33751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR0, val); 33771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR1 33791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 33801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 SFLG Shared Flag, 0 = disable shared flags 33811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 GALP Go Active On Loop, 0 = not used 33821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 GLP Go On Loop, 0 = not used 33831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 ODS Output Driver Select, 1=TxD is push-pull output 33841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 ITF Interframe Time Fill, 0=mark, 1=flag 33851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02..00 CM[2..0] Clock Mode 33861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 33871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0001 0000 33881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 33891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x10 + clkmode; 33901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR1, val); 33911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR2 33931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 33941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..06 BGR[9..8] Baud rate bits 9..8 33951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value 33961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 SSEL Clock source select, 1=submode b 33971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 TOE 0=TxCLK is input, 0=TxCLK is input 33981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RWX Read/Write Exchange 0=disabled 33991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 34001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 DIV, data inversion 0=disabled, 1=enabled 34011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 34021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0000 34031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 34041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x00; 34051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (clkmode == 2 || clkmode == 3 || clkmode == 6 34061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds || clkmode == 7 || (clkmode == 0 && clksubmode == 1)) 34071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT5; 34081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (clksubmode) 34091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT4; 34101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.crc_type == HDLC_CRC_32_CCITT) 34111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT1; 34121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.encoding == HDLC_ENCODING_NRZB) 34131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT0; 34141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR2, val); 34151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR3 34171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 34181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8 34191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 EPT Enable preamble transmission, 1=enabled 34201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 RADD Receive address pushed to FIFO, 0=disabled 34211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 CRL CRC Reset Level, 0=FFFF 34221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RCRC Rx CRC 0=On 1=Off 34231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 TCRC Tx CRC 0=On 1=Off 34241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 PSD DPLL Phase Shift Disable 34251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 34261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0000 34271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 34281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x00; 34291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.crc_type == HDLC_CRC_NONE) 34301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT2 + BIT1; 34311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE) 34321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT5; 34331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (info->params.preamble_length) 34341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 34351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_PREAMBLE_LENGTH_16BITS: 34361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT6; 34371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 34381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_PREAMBLE_LENGTH_32BITS: 34391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT6; 34401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 34411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_PREAMBLE_LENGTH_64BITS: 34421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT7 + BIT6; 34431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 34441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR3, val); 34461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* PRE - Preamble pattern */ 34481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0; 34491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (info->params.preamble) 34501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 34511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break; 34521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break; 34531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break; 34541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break; 34551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + PRE, val); 34571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR4 34591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 34601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 MCK4 Master Clock Divide by 4, 1=enabled 34611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled 34621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 TST1 Test Pin, 0=normal operation 34631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 ICD Ivert Carrier Detect, 1=enabled (active low) 34641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03..02 Reserved, must be 0 34651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes 34661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 34671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0101 0000 34681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 34691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x50; 34701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR4, val); 34711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_RXC_DPLL) 34721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_set_rate(info, CHA, info->params.clock_speed * 16); 34731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 34741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_set_rate(info, CHA, info->params.clock_speed); 34751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* RLCR Receive length check register 34771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 34781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7 1=enable receive length check 34791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 6..0 Max frame length = (RL + 1) * 32 34801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 34811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + RLCR, 0); 34821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* XBCH Transmit Byte Count High 34841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 34851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 DMA mode, 0 = interrupt driven 34861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 NRM, 0=ABM (ignored) 34871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 CAS Carrier Auto Start 34881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 XC Transmit Continuously (ignored) 34891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03..00 XBC[10..8] Transmit byte count bits 10..8 34901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 34911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0000 34921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 34931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x00; 34941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_AUTO_DCD) 34951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT5; 34961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + XBCH, val); 34971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enable_auxclk(info); 34981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.loopback || info->testing_irq) 34991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loopback_enable(info); 35001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_AUTO_CTS) 35011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 35021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_enable(info, CHB, IRQ_CTS); 35031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* PVR[3] 1=AUTO CTS active */ 35041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_reg_bits(info, CHA + PVR, BIT3); 35051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 35061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_reg_bits(info, CHA + PVR, BIT3); 35071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_enable(info, CHA, 35091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT + 35101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_UNDERRUN + IRQ_TXFIFO); 35111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); 35121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_command_complete(info, CHA); 35131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_reg16(info, CHA + ISR); /* clear pending IRQs */ 35141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Master clock mode enabled above to allow reset commands 35161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to complete even if no data clocks are present. 35171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 35181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disable master clock mode for normal communications because 35191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * V3.2 of the ESCC2 has a bug that prevents the transmit all sent 35201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * IRQ when in master clock mode. 35211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 35221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Leave master clock mode enabled for IRQ test because the 35231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * timer IRQ used by the test can only happen in master clock mode. 35241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 35251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->testing_irq) 35261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_reg_bits(info, CHA + CCR0, BIT6); 35271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_set_idle(info); 35291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 35311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_stop(info); 35321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid rx_stop(MGSLPC_INFO *info) 35351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 35371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):rx_stop(%s)\n", 35381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 35391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* MODE:03 RAC Receiver Active, 0=inactive */ 35411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_reg_bits(info, CHA + MODE, BIT3); 35421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_enabled = 0; 35441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_overflow = 0; 35451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid rx_start(MGSLPC_INFO *info) 35481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 35501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):rx_start(%s)\n", 35511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 35521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_reset_buffers(info); 35541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_enabled = 0; 35551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_overflow = 0; 35561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* MODE:03 RAC Receiver Active, 1=active */ 35581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_reg_bits(info, CHA + MODE, BIT3); 35591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_enabled = 1; 35611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid tx_start(MGSLPC_INFO *info) 35641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 35661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):tx_start(%s)\n", 35671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 35681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->tx_count) { 35701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If auto RTS enabled and RTS is inactive, then assert */ 35711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* RTS and set a flag indicating that the driver should */ 35721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* negate RTS when the transmission completes. */ 35731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->drop_rts_on_tx_done = 0; 35741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_AUTO_RTS) { 35761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 35771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(info->serial_signals & SerialSignal_RTS)) { 35781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_RTS; 35791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_signals(info); 35801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->drop_rts_on_tx_done = 1; 35811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_ASYNC) { 35851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_active) { 35861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_active = 1; 35871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_ready(info); 35881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 35901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_active = 1; 35911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_ready(info); 35921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_timer.expires = jiffies + msecs_to_jiffies(5000); 35931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_timer(&info->tx_timer); 35941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_enabled) 35981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_enabled = 1; 35991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid tx_stop(MGSLPC_INFO *info) 36021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_ISR) 36041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):tx_stop(%s)\n", 36051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__, info->device_name ); 36061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_timer(&info->tx_timer); 36081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_enabled = 0; 36101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_active = 0; 36111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Reset the adapter to a known state and prepare it for further use. 36141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 36151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid reset_device(MGSLPC_INFO *info) 36161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* power up both channels (set BIT7) */ 36181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR0, 0x80); 36191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHB + CCR0, 0x80); 36201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + MODE, 0); 36211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHB + MODE, 0); 36221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* disable all interrupts */ 36241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHA, 0xffff); 36251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHB, 0xffff); 36261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port_irq_disable(info, 0xff); 36271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* PCR Port Configuration Register 36291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..04 DEC[3..0] Serial I/F select outputs 36311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 output, 1=AUTO CTS control enabled 36321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RI Ring Indicator input 0=active 36331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 DSR input 0=active 36341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 DTR output 0=active 36351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0110 36371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 36381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, PCR, 0x06); 36391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* PVR Port Value Register 36411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..04 DEC[3..0] Serial I/F select (0000=disabled) 36431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 AUTO CTS output 1=enabled 36441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RI Ring Indicator input 36451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 DSR input 36461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 DTR output (1=inactive) 36471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0001 36491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 36501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// write_reg(info, PVR, PVR_DTR); 36511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* IPC Interrupt Port Configuration 36531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 VIS 1=Masked interrupts visible 36551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06..05 Reserved, 0 36561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04..03 SLA Slave address, 00 ignored 36571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 CASM Cascading Mode, 1=daisy chain 36581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low 36591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0101 36611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 36621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, IPC, 0x05); 36631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid async_mode(MGSLPC_INFO *info) 36661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char val; 36681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* disable all interrupts */ 36701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHA, 0xffff); 36711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_disable(info, CHB, 0xffff); 36721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port_irq_disable(info, 0xff); 36731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* MODE 36751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 Reserved, 0 36771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 FRTS RTS State, 0=active 36781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 FCTS Flow Control on CTS 36791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 FLON Flow Control Enable 36801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 RAC Receiver Active, 0 = inactive 36811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RTS 0=Auto RTS, 1=manual RTS 36821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 TRS Timer Resolution, 1=512 36831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 TLP Test Loop, 0 = no loop 36841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0110 36861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 36871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x06; 36881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.loopback) 36891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT0; 36901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* preserve RTS state */ 36921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(info->serial_signals & SerialSignal_RTS)) 36931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT6; 36941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + MODE, val); 36951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR0 36971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 36981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 PU Power Up, 1=active, 0=power down 36991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 MCE Master Clock Enable, 1=enabled 37001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 Reserved, 0 37011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04..02 SC[2..0] Encoding, 000=NRZ 37021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01..00 SM[1..0] Serial Mode, 11=Async 37031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1000 0011 37051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 37061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR0, 0x83); 37071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR1 37091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..05 Reserved, 0 37111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 ODS Output Driver Select, 1=TxD is push-pull output 37121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 BCR Bit Clock Rate, 1=16x 37131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02..00 CM[2..0] Clock Mode, 111=BRG 37141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0001 1111 37161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 37171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR1, 0x1f); 37181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR2 (channel A) 37201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..06 BGR[9..8] Baud rate bits 9..8 37221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value 37231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 SSEL Clock source select, 1=submode b 37241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03 TOE 0=TxCLK is input, 0=TxCLK is input 37251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 RWX Read/Write Exchange 0=disabled 37261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 Reserved, 0 37271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 DIV, data inversion 0=disabled, 1=enabled 37281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0001 0000 37301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 37311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR2, 0x10); 37321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR3 37341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07..01 Reserved, 0 37361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 PSD DPLL Phase Shift Disable 37371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0000 37391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 37401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR3, 0); 37411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CCR4 37431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 MCK4 Master Clock Divide by 4, 1=enabled 37451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled 37461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 TST1 Test Pin, 0=normal operation 37471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 ICD Ivert Carrier Detect, 1=enabled (active low) 37481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03..00 Reserved, must be 0 37491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0101 0000 37511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 37521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + CCR4, 0x50); 37531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_set_rate(info, CHA, info->params.data_rate * 16); 37541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DAFO Data Format 37561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 Reserved, 0 37581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 XBRK transmit break, 0=normal operation 37591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 Stop bits (0=1, 1=2) 37601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04..03 PAR[1..0] Parity (01=odd, 10=even) 37611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 02 PAREN Parity Enable 37621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01..00 CHL[1..0] Character Length (00=8, 01=7) 37631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 37651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x00; 37661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.data_bits != 8) 37671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT0; /* 7 bits */ 37681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.stop_bits != 1) 37691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT5; 37701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.parity != ASYNC_PARITY_NONE) 37711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 37721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT2; /* Parity enable */ 37731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.parity == ASYNC_PARITY_ODD) 37741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT3; 37751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 37761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT4; 37771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + DAFO, val); 37791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* RFC Rx FIFO Control 37811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 Reserved, 0 37831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 DPS, 1=parity bit not stored in data byte 37841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 DXS, 0=all data stored in FIFO (including XON/XOFF) 37851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO 37861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte 37871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 01 Reserved, 0 37881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 00 TCDE Terminate Char Detect Enable, 0=disabled 37891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0101 1100 37911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 37921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + RFC, 0x5c); 37931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* RLCR Receive length check register 37951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 37961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Max frame length = (RL + 1) * 32 37971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 37981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + RLCR, 0); 37991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* XBCH Transmit Byte Count High 38011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 38021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 07 DMA mode, 0 = interrupt driven 38031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 NRM, 0=ABM (ignored) 38041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 CAS Carrier Auto Start 38051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 XC Transmit Continuously (ignored) 38061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 03..00 XBC[10..8] Transmit byte count bits 10..8 38071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 38081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0000 0000 38091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 38101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = 0x00; 38111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_AUTO_DCD) 38121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT5; 38131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + XBCH, val); 38141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_AUTO_CTS) 38151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_enable(info, CHA, IRQ_CTS); 38161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* MODE:03 RAC Receiver Active, 1=active */ 38181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_reg_bits(info, CHA + MODE, BIT3); 38191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enable_auxclk(info); 38201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.flags & HDLC_FLAG_AUTO_CTS) { 38211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_enable(info, CHB, IRQ_CTS); 38221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* PVR[3] 1=AUTO CTS active */ 38231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_reg_bits(info, CHA + PVR, BIT3); 38241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 38251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_reg_bits(info, CHA + PVR, BIT3); 38261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_enable(info, CHA, 38271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME + 38281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_ALLSENT + IRQ_TXFIFO); 38291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); 38301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_command_complete(info, CHA); 38311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds read_reg16(info, CHA + ISR); /* clear pending IRQs */ 38321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 38331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Set the HDLC idle mode for the transmitter. 38351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 38361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid tx_set_idle(MGSLPC_INFO *info) 38371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 38381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Note: ESCC2 only supports flags and one idle modes */ 38391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->idle_mode == HDLC_TXIDLE_FLAGS) 38401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_reg_bits(info, CHA + CCR1, BIT3); 38411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 38421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_reg_bits(info, CHA + CCR1, BIT3); 38431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 38441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* get state of the V24 status (input) signals. 38461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 38471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid get_signals(MGSLPC_INFO *info) 38481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 38491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char status = 0; 38501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* preserve DTR and RTS */ 38521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; 38531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (read_reg(info, CHB + VSTR) & BIT7) 38551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_DCD; 38561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (read_reg(info, CHB + STAR) & BIT1) 38571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_CTS; 38581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = read_reg(info, CHA + PVR); 38601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(status & PVR_RI)) 38611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_RI; 38621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(status & PVR_DSR)) 38631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_DSR; 38641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 38651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Set the state of DTR and RTS based on contents of 38671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * serial_signals member of device extension. 38681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 38691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid set_signals(MGSLPC_INFO *info) 38701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 38711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char val; 38721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val = read_reg(info, CHA + MODE); 38741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.mode == MGSL_MODE_ASYNC) { 38751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_RTS) 38761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val &= ~BIT6; 38771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 38781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT6; 38791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 38801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_RTS) 38811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= BIT2; 38821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 38831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val &= ~BIT2; 38841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + MODE, val); 38861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->serial_signals & SerialSignal_DTR) 38881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_reg_bits(info, CHA + PVR, PVR_DTR); 38891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 38901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_reg_bits(info, CHA + PVR, PVR_DTR); 38911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 38921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid rx_reset_buffers(MGSLPC_INFO *info) 38941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 38951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds RXBUF *buf; 38961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 38971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_put = 0; 38991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_get = 0; 39001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_frame_count = 0; 39011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i=0 ; i < info->rx_buf_count ; i++) { 39021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size)); 39031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->status = buf->count = 0; 39041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 39061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Attempt to return a received HDLC frame 39081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Only frames received without errors are returned. 39091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 39101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns 1 if frame returned, otherwise 0 39111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 39121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint rx_get_frame(MGSLPC_INFO *info) 39131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 39141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short status; 39151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds RXBUF *buf; 39161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int framesize = 0; 39171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 39181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tty_struct *tty = info->tty; 39191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int return_frame = 0; 39201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->rx_frame_count == 0) 39221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 39231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size)); 39251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = buf->status; 39271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 07 VFR 1=valid frame 39291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 06 RDO 1=data overrun 39301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 05 CRC 1=OK, 0=error 39311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 04 RAB 1=frame aborted 39321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 39331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((status & 0xf0) != 0xA0) { 39341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(status & BIT7) || (status & BIT4)) 39351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.rxabort++; 39361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (status & BIT6) 39371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.rxover++; 39381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (!(status & BIT5)) { 39391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.rxcrc++; 39401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.crc_type & HDLC_CRC_RETURN_EX) 39411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return_frame = 1; 39421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds framesize = 0; 39441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 39451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 39461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device_stats *stats = hdlc_stats(info->netdev); 39471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->rx_errors++; 39481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->rx_frame_errors++; 39491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 39511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 39521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return_frame = 1; 39531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (return_frame) 39551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds framesize = buf->count; 39561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_BH) 39581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n", 39591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name,status,framesize); 39601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_DATA) 39621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds trace_block(info, buf->data, framesize, 0); 39631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (framesize) { 39651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((info->params.crc_type & HDLC_CRC_RETURN_EX && 39661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds framesize+1 > info->max_frame_size) || 39671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds framesize > info->max_frame_size) 39681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.rxlong++; 39691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 39701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & BIT5) 39711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.rxok++; 39721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->params.crc_type & HDLC_CRC_RETURN_EX) { 39741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR; 39751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++framesize; 39761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 39791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->netcount) 39801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlcdev_rx(info, buf->data, framesize); 39811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 39821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 39831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize); 39841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 39881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->status = buf->count = 0; 39891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_frame_count--; 39901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_get++; 39911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->rx_get >= info->rx_buf_count) 39921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->rx_get = 0; 39931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 39941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 39961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 39971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsBOOLEAN register_test(MGSLPC_INFO *info) 39991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static unsigned char patterns[] = 40011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f }; 4002fe971071a89c5c5184fc9f3482c7a8e997cf0520Tobias Klauser static unsigned int count = ARRAY_SIZE(patterns); 40031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int i; 40041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BOOLEAN rc = TRUE; 40051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 40061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 40081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reset_device(info); 40091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < count; i++) { 40111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, XAD1, patterns[i]); 40121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, XAD2, patterns[(i + 1) % count]); 4013fe971071a89c5c5184fc9f3482c7a8e997cf0520Tobias Klauser if ((read_reg(info, XAD1) != patterns[i]) || 40141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (read_reg(info, XAD2) != patterns[(i + 1) % count])) { 40151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = FALSE; 40161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 40171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 40181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 40191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 40211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 40221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsBOOLEAN irq_test(MGSLPC_INFO *info) 40251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long end_time; 40271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 40281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 40301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reset_device(info); 40311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->testing_irq = TRUE; 40331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc_mode(info); 40341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->irq_occurred = FALSE; 40361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* init hdlc mode */ 40381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds irq_enable(info, CHA, IRQ_TIMER); 40401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds write_reg(info, CHA + TIMR, 0); /* 512 cycles */ 40411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds issue_command(info, CHA, CMD_START_TIMER); 40421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 40441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds end_time=100; 40461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(end_time-- && !info->irq_occurred) { 40471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds msleep_interruptible(10); 40481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 40491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->testing_irq = FALSE; 40511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 40531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reset_device(info); 40541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 40551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return info->irq_occurred ? TRUE : FALSE; 40571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint adapter_test(MGSLPC_INFO *info) 40601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!register_test(info)) { 40621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->init_error = DiagStatus_AddressFailure; 40631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):Register test failure for device %s Addr=%04X\n", 40641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) ); 40651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 40661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 40671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!irq_test(info)) { 40691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->init_error = DiagStatus_IrqFailure; 40701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", 40711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); 40721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 40731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 40741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 40761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s(%d):device %s passed diagnostics\n", 40771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name); 40781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 40791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit) 40821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 40841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int linecount; 40851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (xmit) 40861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s tx data:\n",info->device_name); 40871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 40881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s rx data:\n",info->device_name); 40891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while(count) { 40911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > 16) 40921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds linecount = 16; 40931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 40941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds linecount = count; 40951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for(i=0;i<linecount;i++) 40971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%02X ",(unsigned char)data[i]); 40981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for(;i<17;i++) 40991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(" "); 41001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for(i=0;i<linecount;i++) { 41011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (data[i]>=040 && data[i]<=0176) 41021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%c",data[i]); 41031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 41041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("."); 41051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 41061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("\n"); 41071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data += linecount; 41091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count -= linecount; 41101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 41111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 41121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* HDLC frame time out 41141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update stats and do tx completion processing 41151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 41161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid tx_timeout(unsigned long context) 41171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 41181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = (MGSLPC_INFO*)context; 41191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 41201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( debug_level >= DEBUG_LEVEL_INFO ) 41221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk( "%s(%d):tx_timeout(%s)\n", 41231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FILE__,__LINE__,info->device_name); 41241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(info->tx_active && 41251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.mode == MGSL_MODE_HDLC) { 41261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->icount.txtimeout++; 41271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 41281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 41291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_active = 0; 41301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_count = info->tx_put = info->tx_get = 0; 41311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 41331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 41351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->netcount) 41361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlcdev_tx_done(info); 41371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 41381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 41391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh_transmit(info); 41401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 41411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_HDLC 41431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 41451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) 41461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set encoding and frame check sequence (FCS) options 41471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dev pointer to network device structure 41491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * encoding serial encoding setting 41501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parity FCS setting 41511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns 0 if success, otherwise error code 41531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 41541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hdlcdev_attach(struct net_device *dev, unsigned short encoding, 41551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short parity) 41561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 41571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = dev_to_port(dev); 41581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char new_encoding; 41591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short new_crctype; 41601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* return error if TTY interface open */ 41621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->count) 41631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 41641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (encoding) 41661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 41671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; 41681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; 41691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; 41701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; 41711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; 41721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: return -EINVAL; 41731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 41741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (parity) 41761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 41771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; 41781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; 41791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; 41801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: return -EINVAL; 41811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 41821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.encoding = new_encoding; 41841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.crc_type = new_crctype;; 41851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if network interface up, reprogram hardware */ 41871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->netcount) 41881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_program_hw(info); 41891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 41911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 41921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 41941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by generic HDLC layer to send frame 41951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * skb socket buffer containing HDLC frame 41971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dev pointer to network device structure 41981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns 0 if success, otherwise error code 42001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 42011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev) 42021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 42031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = dev_to_port(dev); 42041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device_stats *stats = hdlc_stats(dev); 42051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 42061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 42081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); 42091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* stop sending until this frame completes */ 42111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netif_stop_queue(dev); 42121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* copy data to device buffers */ 42141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(info->tx_buf, skb->data, skb->len); 42151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_get = 0; 42161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->tx_put = info->tx_count = skb->len; 42171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update network statistics */ 42191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->tx_packets++; 42201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->tx_bytes += skb->len; 42211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* done with socket buffer, so free it */ 42231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_kfree_skb(skb); 42241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* save start time for transmit timeout detection */ 42261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->trans_start = jiffies; 42271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* start hardware transmitter if necessary */ 42291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 42301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!info->tx_active) 42311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_start(info); 42321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 42331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 42351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 42361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 42381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by network layer when interface enabled 42391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * claim resources and initialize hardware 42401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 42411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dev pointer to network device structure 42421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 42431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns 0 if success, otherwise error code 42441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 42451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hdlcdev_open(struct net_device *dev) 42461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 42471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = dev_to_port(dev); 42481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 42491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 42501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 42521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); 42531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* generic HDLC layer open processing */ 42551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = hdlc_open(dev))) 42561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 42571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* arbitrate between network and tty opens */ 42591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->netlock, flags); 42601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->count != 0 || info->netcount != 0) { 42611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); 42621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->netlock, flags); 42631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 42641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 42651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->netcount=1; 42661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->netlock, flags); 42671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* claim resources and init adapter */ 42691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = startup(info)) != 0) { 42701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->netlock, flags); 42711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->netcount=0; 42721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->netlock, flags); 42731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 42741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 42751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* assert DTR and RTS, apply hardware settings */ 42771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; 42781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_program_hw(info); 42791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* enable network layer transmit */ 42811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->trans_start = jiffies; 42821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netif_start_queue(dev); 42831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* inform generic HDLC layer of current DCD status */ 42851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock, flags); 42861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_signals(info); 42871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock, flags); 42881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, dev); 42891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 42911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 42921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 42931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 42941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by network layer when interface is disabled 42951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * shutdown hardware and release resources 42961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 42971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dev pointer to network device structure 42981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 42991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns 0 if success, otherwise error code 43001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 43011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hdlcdev_close(struct net_device *dev) 43021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 43031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = dev_to_port(dev); 43041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 43051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 43071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); 43081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netif_stop_queue(dev); 43101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* shutdown adapter and release resources */ 43121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds shutdown(info); 43131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc_close(dev); 43151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->netlock, flags); 43171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->netcount=0; 43181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->netlock, flags); 43191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 43211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 43221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 43241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by network layer to process IOCTL call to network device 43251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 43261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dev pointer to network device structure 43271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ifr pointer to network interface request structure 43281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cmd IOCTL command code 43291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 43301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns 0 if success, otherwise error code 43311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 43321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 43331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 43341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const size_t size = sizeof(sync_serial_settings); 43351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sync_serial_settings new_line; 43361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; 43371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = dev_to_port(dev); 43381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int flags; 43391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 43411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); 43421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* return error if TTY interface open */ 43441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->count) 43451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 43461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cmd != SIOCWANDEV) 43481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hdlc_ioctl(dev, ifr, cmd); 43491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch(ifr->ifr_settings.type) { 43511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case IF_GET_IFACE: /* return current sync_serial_settings */ 43521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; 43541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ifr->ifr_settings.size < size) { 43551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ifr->ifr_settings.size = size; /* data size wanted */ 43561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOBUFS; 43571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 43581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | 43601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | 43611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | 43621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); 43631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (flags){ 43651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; 43661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; 43671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; 43681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; 43691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: new_line.clock_type = CLOCK_DEFAULT; 43701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 43711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_line.clock_rate = info->params.clock_speed; 43731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_line.loopback = info->params.loopback ? 1:0; 43741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_to_user(line, &new_line, size)) 43761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 43771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 43781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ 43801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if(!capable(CAP_NET_ADMIN)) 43821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPERM; 43831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(&new_line, line, size)) 43841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 43851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 43861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (new_line.clock_type) 43871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 43881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; 43891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; 43901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; 43911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; 43921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CLOCK_DEFAULT: flags = info->params.flags & 43931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | 43941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | 43951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | 43961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; 43971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: return -EINVAL; 43981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 43991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_line.loopback != 0 && new_line.loopback != 1) 44011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 44021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | 44041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | 44051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | 44061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); 44071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.flags |= flags; 44081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.loopback = new_line.loopback; 44101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) 44121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.clock_speed = new_line.clock_rate; 44131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 44141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->params.clock_speed = 0; 44151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if network interface up, reprogram hardware */ 44171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (info->netcount) 44181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mgslpc_program_hw(info); 44191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 44201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 44221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hdlc_ioctl(dev, ifr, cmd); 44231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 44241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 44251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 44271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by network layer when transmit timeout is detected 44281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 44291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dev pointer to network device structure 44301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 44311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hdlcdev_tx_timeout(struct net_device *dev) 44321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 44331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MGSLPC_INFO *info = dev_to_port(dev); 44341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device_stats *stats = hdlc_stats(dev); 44351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 44361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 44381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("hdlcdev_tx_timeout(%s)\n",dev->name); 44391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->tx_errors++; 44411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->tx_aborted_errors++; 44421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&info->lock,flags); 44441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tx_stop(info); 44451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&info->lock,flags); 44461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netif_wake_queue(dev); 44481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 44491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 44511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by device driver when transmit completes 44521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * reenable network layer transmit if stopped 44531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 44541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * info pointer to device instance information 44551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 44561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hdlcdev_tx_done(MGSLPC_INFO *info) 44571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 44581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (netif_queue_stopped(info->netdev)) 44591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netif_wake_queue(info->netdev); 44601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 44611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 44631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by device driver when frame received 44641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pass frame to network layer 44651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 44661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * info pointer to device instance information 44671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buf pointer to buffer contianing frame data 44681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * size count of data bytes in buf 44691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 44701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size) 44711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 44721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sk_buff *skb = dev_alloc_skb(size); 44731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device *dev = info->netdev; 44741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device_stats *stats = hdlc_stats(dev); 44751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (debug_level >= DEBUG_LEVEL_INFO) 44771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("hdlcdev_rx(%s)\n",dev->name); 44781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (skb == NULL) { 44801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name); 44811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->rx_dropped++; 44821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 44831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 44841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(skb_put(skb, size),buf,size); 44861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds skb->protocol = hdlc_type_trans(skb, info->netdev); 44881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->rx_packets++; 44901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds stats->rx_bytes += size; 44911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netif_rx(skb); 44931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->netdev->last_rx = jiffies; 44951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 44961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 44971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 44981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by device driver when adding device instance 44991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * do generic HDLC initialization 45001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 45011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * info pointer to device instance information 45021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 45031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns 0 if success, otherwise error code 45041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 45051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hdlcdev_init(MGSLPC_INFO *info) 45061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 45071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 45081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct net_device *dev; 45091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc_device *hdlc; 45101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* allocate and initialize network and HDLC layer objects */ 45121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(dev = alloc_hdlcdev(info))) { 45141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); 45151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 45161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 45171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* for network layer reporting purposes only */ 45191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->base_addr = info->io_base; 45201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->irq = info->irq_level; 45211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* network layer callbacks and settings */ 45231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->do_ioctl = hdlcdev_ioctl; 45241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->open = hdlcdev_open; 45251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->stop = hdlcdev_close; 45261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->tx_timeout = hdlcdev_tx_timeout; 45271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->watchdog_timeo = 10*HZ; 45281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->tx_queue_len = 50; 45291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* generic HDLC layer callbacks and settings */ 45311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc = dev_to_hdlc(dev); 45321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc->attach = hdlcdev_attach; 45331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlc->xmit = hdlcdev_xmit; 45341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* register objects with HDLC layer */ 45361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = register_hdlc_device(dev))) { 45371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); 45381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_netdev(dev); 45391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 45401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 45411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->netdev = dev; 45431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 45441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 45451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 45471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called by device driver when removing device instance 45481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * do generic HDLC cleanup 45491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 45501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * info pointer to device instance information 45511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 45521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hdlcdev_exit(MGSLPC_INFO *info) 45531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 45541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_hdlc_device(info->netdev); 45551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_netdev(info->netdev); 45561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds info->netdev = NULL; 45571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 45581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_HDLC */ 45601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4561