1/****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Filip Aben <f.aben@option.com> 7 * Denis Joseph Barrow <d.barow@option.com> 8 * Jan Dumon <j.dumon@option.com> 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 10 * <ajb@spheresystems.co.uk> 11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 12 * Copyright (C) 2008 Novell, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 26 * USA 27 * 28 * 29 *****************************************************************************/ 30 31/****************************************************************************** 32 * 33 * Description of the device: 34 * 35 * Interface 0: Contains the IP network interface on the bulk end points. 36 * The multiplexed serial ports are using the interrupt and 37 * control endpoints. 38 * Interrupt contains a bitmap telling which multiplexed 39 * serialport needs servicing. 40 * 41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 42 * port is opened, as this have a huge impact on the network port 43 * throughput. 44 * 45 * Interface 2: Standard modem interface - circuit switched interface, this 46 * can be used to make a standard ppp connection however it 47 * should not be used in conjunction with the IP network interface 48 * enabled for USB performance reasons i.e. if using this set 49 * ideally disable_net=1. 50 * 51 *****************************************************************************/ 52 53#include <linux/sched.h> 54#include <linux/slab.h> 55#include <linux/init.h> 56#include <linux/delay.h> 57#include <linux/netdevice.h> 58#include <linux/module.h> 59#include <linux/ethtool.h> 60#include <linux/usb.h> 61#include <linux/timer.h> 62#include <linux/tty.h> 63#include <linux/tty_driver.h> 64#include <linux/tty_flip.h> 65#include <linux/kmod.h> 66#include <linux/rfkill.h> 67#include <linux/ip.h> 68#include <linux/uaccess.h> 69#include <linux/usb/cdc.h> 70#include <net/arp.h> 71#include <asm/byteorder.h> 72#include <linux/serial_core.h> 73#include <linux/serial.h> 74 75 76#define MOD_AUTHOR "Option Wireless" 77#define MOD_DESCRIPTION "USB High Speed Option driver" 78#define MOD_LICENSE "GPL" 79 80#define HSO_MAX_NET_DEVICES 10 81#define HSO__MAX_MTU 2048 82#define DEFAULT_MTU 1500 83#define DEFAULT_MRU 1500 84 85#define CTRL_URB_RX_SIZE 1024 86#define CTRL_URB_TX_SIZE 64 87 88#define BULK_URB_RX_SIZE 4096 89#define BULK_URB_TX_SIZE 8192 90 91#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 92#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 93#define MUX_BULK_RX_BUF_COUNT 4 94#define USB_TYPE_OPTION_VENDOR 0x20 95 96/* These definitions are used with the struct hso_net flags element */ 97/* - use *_bit operations on it. (bit indices not values.) */ 98#define HSO_NET_RUNNING 0 99 100#define HSO_NET_TX_TIMEOUT (HZ*10) 101 102#define HSO_SERIAL_MAGIC 0x48534f31 103 104/* Number of ttys to handle */ 105#define HSO_SERIAL_TTY_MINORS 256 106 107#define MAX_RX_URBS 2 108 109static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 110{ 111 if (tty) 112 return tty->driver_data; 113 return NULL; 114} 115 116/*****************************************************************************/ 117/* Debugging functions */ 118/*****************************************************************************/ 119#define D__(lvl_, fmt, arg...) \ 120 do { \ 121 printk(lvl_ "[%d:%s]: " fmt "\n", \ 122 __LINE__, __func__, ## arg); \ 123 } while (0) 124 125#define D_(lvl, args...) \ 126 do { \ 127 if (lvl & debug) \ 128 D__(KERN_INFO, args); \ 129 } while (0) 130 131#define D1(args...) D_(0x01, ##args) 132#define D2(args...) D_(0x02, ##args) 133#define D3(args...) D_(0x04, ##args) 134#define D4(args...) D_(0x08, ##args) 135#define D5(args...) D_(0x10, ##args) 136 137/*****************************************************************************/ 138/* Enumerators */ 139/*****************************************************************************/ 140enum pkt_parse_state { 141 WAIT_IP, 142 WAIT_DATA, 143 WAIT_SYNC 144}; 145 146/*****************************************************************************/ 147/* Structs */ 148/*****************************************************************************/ 149 150struct hso_shared_int { 151 struct usb_endpoint_descriptor *intr_endp; 152 void *shared_intr_buf; 153 struct urb *shared_intr_urb; 154 struct usb_device *usb; 155 int use_count; 156 int ref_count; 157 struct mutex shared_int_lock; 158}; 159 160struct hso_net { 161 struct hso_device *parent; 162 struct net_device *net; 163 struct rfkill *rfkill; 164 165 struct usb_endpoint_descriptor *in_endp; 166 struct usb_endpoint_descriptor *out_endp; 167 168 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 169 struct urb *mux_bulk_tx_urb; 170 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 171 void *mux_bulk_tx_buf; 172 173 struct sk_buff *skb_rx_buf; 174 struct sk_buff *skb_tx_buf; 175 176 enum pkt_parse_state rx_parse_state; 177 spinlock_t net_lock; 178 179 unsigned short rx_buf_size; 180 unsigned short rx_buf_missing; 181 struct iphdr rx_ip_hdr; 182 183 unsigned long flags; 184}; 185 186enum rx_ctrl_state{ 187 RX_IDLE, 188 RX_SENT, 189 RX_PENDING 190}; 191 192#define BM_REQUEST_TYPE (0xa1) 193#define B_NOTIFICATION (0x20) 194#define W_VALUE (0x0) 195#define W_INDEX (0x2) 196#define W_LENGTH (0x2) 197 198#define B_OVERRUN (0x1<<6) 199#define B_PARITY (0x1<<5) 200#define B_FRAMING (0x1<<4) 201#define B_RING_SIGNAL (0x1<<3) 202#define B_BREAK (0x1<<2) 203#define B_TX_CARRIER (0x1<<1) 204#define B_RX_CARRIER (0x1<<0) 205 206struct hso_serial_state_notification { 207 u8 bmRequestType; 208 u8 bNotification; 209 u16 wValue; 210 u16 wIndex; 211 u16 wLength; 212 u16 UART_state_bitmap; 213} __packed; 214 215struct hso_tiocmget { 216 struct mutex mutex; 217 wait_queue_head_t waitq; 218 int intr_completed; 219 struct usb_endpoint_descriptor *endp; 220 struct urb *urb; 221 struct hso_serial_state_notification serial_state_notification; 222 u16 prev_UART_state_bitmap; 223 struct uart_icount icount; 224}; 225 226 227struct hso_serial { 228 struct hso_device *parent; 229 int magic; 230 u8 minor; 231 232 struct hso_shared_int *shared_int; 233 234 /* rx/tx urb could be either a bulk urb or a control urb depending 235 on which serial port it is used on. */ 236 struct urb *rx_urb[MAX_RX_URBS]; 237 u8 num_rx_urbs; 238 u8 *rx_data[MAX_RX_URBS]; 239 u16 rx_data_length; /* should contain allocated length */ 240 241 struct urb *tx_urb; 242 u8 *tx_data; 243 u8 *tx_buffer; 244 u16 tx_data_length; /* should contain allocated length */ 245 u16 tx_data_count; 246 u16 tx_buffer_count; 247 struct usb_ctrlrequest ctrl_req_tx; 248 struct usb_ctrlrequest ctrl_req_rx; 249 250 struct usb_endpoint_descriptor *in_endp; 251 struct usb_endpoint_descriptor *out_endp; 252 253 enum rx_ctrl_state rx_state; 254 u8 rts_state; 255 u8 dtr_state; 256 unsigned tx_urb_used:1; 257 258 /* from usb_serial_port */ 259 struct tty_struct *tty; 260 int open_count; 261 spinlock_t serial_lock; 262 263 int (*write_data) (struct hso_serial *serial); 264 struct hso_tiocmget *tiocmget; 265 /* Hacks required to get flow control 266 * working on the serial receive buffers 267 * so as not to drop characters on the floor. 268 */ 269 int curr_rx_urb_idx; 270 u16 curr_rx_urb_offset; 271 u8 rx_urb_filled[MAX_RX_URBS]; 272 struct tasklet_struct unthrottle_tasklet; 273 struct work_struct retry_unthrottle_workqueue; 274}; 275 276struct hso_device { 277 union { 278 struct hso_serial *dev_serial; 279 struct hso_net *dev_net; 280 } port_data; 281 282 u32 port_spec; 283 284 u8 is_active; 285 u8 usb_gone; 286 struct work_struct async_get_intf; 287 struct work_struct async_put_intf; 288 struct work_struct reset_device; 289 290 struct usb_device *usb; 291 struct usb_interface *interface; 292 293 struct device *dev; 294 struct kref ref; 295 struct mutex mutex; 296}; 297 298/* Type of interface */ 299#define HSO_INTF_MASK 0xFF00 300#define HSO_INTF_MUX 0x0100 301#define HSO_INTF_BULK 0x0200 302 303/* Type of port */ 304#define HSO_PORT_MASK 0xFF 305#define HSO_PORT_NO_PORT 0x0 306#define HSO_PORT_CONTROL 0x1 307#define HSO_PORT_APP 0x2 308#define HSO_PORT_GPS 0x3 309#define HSO_PORT_PCSC 0x4 310#define HSO_PORT_APP2 0x5 311#define HSO_PORT_GPS_CONTROL 0x6 312#define HSO_PORT_MSD 0x7 313#define HSO_PORT_VOICE 0x8 314#define HSO_PORT_DIAG2 0x9 315#define HSO_PORT_DIAG 0x10 316#define HSO_PORT_MODEM 0x11 317#define HSO_PORT_NETWORK 0x12 318 319/* Additional device info */ 320#define HSO_INFO_MASK 0xFF000000 321#define HSO_INFO_CRC_BUG 0x01000000 322 323/*****************************************************************************/ 324/* Prototypes */ 325/*****************************************************************************/ 326/* Serial driver functions */ 327static int hso_serial_tiocmset(struct tty_struct *tty, 328 unsigned int set, unsigned int clear); 329static void ctrl_callback(struct urb *urb); 330static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 331static void hso_kick_transmit(struct hso_serial *serial); 332/* Helper functions */ 333static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 334 struct usb_device *usb, gfp_t gfp); 335static void handle_usb_error(int status, const char *function, 336 struct hso_device *hso_dev); 337static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 338 int type, int dir); 339static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 340static void hso_free_interface(struct usb_interface *intf); 341static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 342static int hso_stop_serial_device(struct hso_device *hso_dev); 343static int hso_start_net_device(struct hso_device *hso_dev); 344static void hso_free_shared_int(struct hso_shared_int *shared_int); 345static int hso_stop_net_device(struct hso_device *hso_dev); 346static void hso_serial_ref_free(struct kref *ref); 347static void hso_std_serial_read_bulk_callback(struct urb *urb); 348static int hso_mux_serial_read(struct hso_serial *serial); 349static void async_get_intf(struct work_struct *data); 350static void async_put_intf(struct work_struct *data); 351static int hso_put_activity(struct hso_device *hso_dev); 352static int hso_get_activity(struct hso_device *hso_dev); 353static void tiocmget_intr_callback(struct urb *urb); 354static void reset_device(struct work_struct *data); 355/*****************************************************************************/ 356/* Helping functions */ 357/*****************************************************************************/ 358 359/* #define DEBUG */ 360 361static inline struct hso_net *dev2net(struct hso_device *hso_dev) 362{ 363 return hso_dev->port_data.dev_net; 364} 365 366static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 367{ 368 return hso_dev->port_data.dev_serial; 369} 370 371/* Debugging functions */ 372#ifdef DEBUG 373static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 374 unsigned int len) 375{ 376 static char name[255]; 377 378 sprintf(name, "hso[%d:%s]", line_count, func_name); 379 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 380} 381 382#define DUMP(buf_, len_) \ 383 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 384 385#define DUMP1(buf_, len_) \ 386 do { \ 387 if (0x01 & debug) \ 388 DUMP(buf_, len_); \ 389 } while (0) 390#else 391#define DUMP(buf_, len_) 392#define DUMP1(buf_, len_) 393#endif 394 395/* module parameters */ 396static int debug; 397static int tty_major; 398static int disable_net; 399 400/* driver info */ 401static const char driver_name[] = "hso"; 402static const char tty_filename[] = "ttyHS"; 403static const char *version = __FILE__ ": " MOD_AUTHOR; 404/* the usb driver itself (registered in hso_init) */ 405static struct usb_driver hso_driver; 406/* serial structures */ 407static struct tty_driver *tty_drv; 408static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 409static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 410static spinlock_t serial_table_lock; 411 412static const s32 default_port_spec[] = { 413 HSO_INTF_MUX | HSO_PORT_NETWORK, 414 HSO_INTF_BULK | HSO_PORT_DIAG, 415 HSO_INTF_BULK | HSO_PORT_MODEM, 416 0 417}; 418 419static const s32 icon321_port_spec[] = { 420 HSO_INTF_MUX | HSO_PORT_NETWORK, 421 HSO_INTF_BULK | HSO_PORT_DIAG2, 422 HSO_INTF_BULK | HSO_PORT_MODEM, 423 HSO_INTF_BULK | HSO_PORT_DIAG, 424 0 425}; 426 427#define default_port_device(vendor, product) \ 428 USB_DEVICE(vendor, product), \ 429 .driver_info = (kernel_ulong_t)default_port_spec 430 431#define icon321_port_device(vendor, product) \ 432 USB_DEVICE(vendor, product), \ 433 .driver_info = (kernel_ulong_t)icon321_port_spec 434 435/* list of devices we support */ 436static const struct usb_device_id hso_ids[] = { 437 {default_port_device(0x0af0, 0x6711)}, 438 {default_port_device(0x0af0, 0x6731)}, 439 {default_port_device(0x0af0, 0x6751)}, 440 {default_port_device(0x0af0, 0x6771)}, 441 {default_port_device(0x0af0, 0x6791)}, 442 {default_port_device(0x0af0, 0x6811)}, 443 {default_port_device(0x0af0, 0x6911)}, 444 {default_port_device(0x0af0, 0x6951)}, 445 {default_port_device(0x0af0, 0x6971)}, 446 {default_port_device(0x0af0, 0x7011)}, 447 {default_port_device(0x0af0, 0x7031)}, 448 {default_port_device(0x0af0, 0x7051)}, 449 {default_port_device(0x0af0, 0x7071)}, 450 {default_port_device(0x0af0, 0x7111)}, 451 {default_port_device(0x0af0, 0x7211)}, 452 {default_port_device(0x0af0, 0x7251)}, 453 {default_port_device(0x0af0, 0x7271)}, 454 {default_port_device(0x0af0, 0x7311)}, 455 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 456 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 457 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 458 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 459 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 460 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 461 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 462 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 463 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 464 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 465 {USB_DEVICE(0x0af0, 0x7701)}, 466 {USB_DEVICE(0x0af0, 0x7706)}, 467 {USB_DEVICE(0x0af0, 0x7801)}, 468 {USB_DEVICE(0x0af0, 0x7901)}, 469 {USB_DEVICE(0x0af0, 0x7A01)}, 470 {USB_DEVICE(0x0af0, 0x7A05)}, 471 {USB_DEVICE(0x0af0, 0x8200)}, 472 {USB_DEVICE(0x0af0, 0x8201)}, 473 {USB_DEVICE(0x0af0, 0x8300)}, 474 {USB_DEVICE(0x0af0, 0x8302)}, 475 {USB_DEVICE(0x0af0, 0x8304)}, 476 {USB_DEVICE(0x0af0, 0x8400)}, 477 {USB_DEVICE(0x0af0, 0x8600)}, 478 {USB_DEVICE(0x0af0, 0x8800)}, 479 {USB_DEVICE(0x0af0, 0x8900)}, 480 {USB_DEVICE(0x0af0, 0x9000)}, 481 {USB_DEVICE(0x0af0, 0xd035)}, 482 {USB_DEVICE(0x0af0, 0xd055)}, 483 {USB_DEVICE(0x0af0, 0xd155)}, 484 {USB_DEVICE(0x0af0, 0xd255)}, 485 {USB_DEVICE(0x0af0, 0xd057)}, 486 {USB_DEVICE(0x0af0, 0xd157)}, 487 {USB_DEVICE(0x0af0, 0xd257)}, 488 {USB_DEVICE(0x0af0, 0xd357)}, 489 {USB_DEVICE(0x0af0, 0xd058)}, 490 {USB_DEVICE(0x0af0, 0xc100)}, 491 {} 492}; 493MODULE_DEVICE_TABLE(usb, hso_ids); 494 495/* Sysfs attribute */ 496static ssize_t hso_sysfs_show_porttype(struct device *dev, 497 struct device_attribute *attr, 498 char *buf) 499{ 500 struct hso_device *hso_dev = dev_get_drvdata(dev); 501 char *port_name; 502 503 if (!hso_dev) 504 return 0; 505 506 switch (hso_dev->port_spec & HSO_PORT_MASK) { 507 case HSO_PORT_CONTROL: 508 port_name = "Control"; 509 break; 510 case HSO_PORT_APP: 511 port_name = "Application"; 512 break; 513 case HSO_PORT_APP2: 514 port_name = "Application2"; 515 break; 516 case HSO_PORT_GPS: 517 port_name = "GPS"; 518 break; 519 case HSO_PORT_GPS_CONTROL: 520 port_name = "GPS Control"; 521 break; 522 case HSO_PORT_PCSC: 523 port_name = "PCSC"; 524 break; 525 case HSO_PORT_DIAG: 526 port_name = "Diagnostic"; 527 break; 528 case HSO_PORT_DIAG2: 529 port_name = "Diagnostic2"; 530 break; 531 case HSO_PORT_MODEM: 532 port_name = "Modem"; 533 break; 534 case HSO_PORT_NETWORK: 535 port_name = "Network"; 536 break; 537 default: 538 port_name = "Unknown"; 539 break; 540 } 541 542 return sprintf(buf, "%s\n", port_name); 543} 544static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 545 546static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 547{ 548 int idx; 549 550 for (idx = 0; idx < serial->num_rx_urbs; idx++) 551 if (serial->rx_urb[idx] == urb) 552 return idx; 553 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 554 return -1; 555} 556 557/* converts mux value to a port spec value */ 558static u32 hso_mux_to_port(int mux) 559{ 560 u32 result; 561 562 switch (mux) { 563 case 0x1: 564 result = HSO_PORT_CONTROL; 565 break; 566 case 0x2: 567 result = HSO_PORT_APP; 568 break; 569 case 0x4: 570 result = HSO_PORT_PCSC; 571 break; 572 case 0x8: 573 result = HSO_PORT_GPS; 574 break; 575 case 0x10: 576 result = HSO_PORT_APP2; 577 break; 578 default: 579 result = HSO_PORT_NO_PORT; 580 } 581 return result; 582} 583 584/* converts port spec value to a mux value */ 585static u32 hso_port_to_mux(int port) 586{ 587 u32 result; 588 589 switch (port & HSO_PORT_MASK) { 590 case HSO_PORT_CONTROL: 591 result = 0x0; 592 break; 593 case HSO_PORT_APP: 594 result = 0x1; 595 break; 596 case HSO_PORT_PCSC: 597 result = 0x2; 598 break; 599 case HSO_PORT_GPS: 600 result = 0x3; 601 break; 602 case HSO_PORT_APP2: 603 result = 0x4; 604 break; 605 default: 606 result = 0x0; 607 } 608 return result; 609} 610 611static struct hso_serial *get_serial_by_shared_int_and_type( 612 struct hso_shared_int *shared_int, 613 int mux) 614{ 615 int i, port; 616 617 port = hso_mux_to_port(mux); 618 619 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 620 if (serial_table[i] && 621 (dev2ser(serial_table[i])->shared_int == shared_int) && 622 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 623 return dev2ser(serial_table[i]); 624 } 625 } 626 627 return NULL; 628} 629 630static struct hso_serial *get_serial_by_index(unsigned index) 631{ 632 struct hso_serial *serial = NULL; 633 unsigned long flags; 634 635 spin_lock_irqsave(&serial_table_lock, flags); 636 if (serial_table[index]) 637 serial = dev2ser(serial_table[index]); 638 spin_unlock_irqrestore(&serial_table_lock, flags); 639 640 return serial; 641} 642 643static int get_free_serial_index(void) 644{ 645 int index; 646 unsigned long flags; 647 648 spin_lock_irqsave(&serial_table_lock, flags); 649 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 650 if (serial_table[index] == NULL) { 651 spin_unlock_irqrestore(&serial_table_lock, flags); 652 return index; 653 } 654 } 655 spin_unlock_irqrestore(&serial_table_lock, flags); 656 657 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 658 return -1; 659} 660 661static void set_serial_by_index(unsigned index, struct hso_serial *serial) 662{ 663 unsigned long flags; 664 665 spin_lock_irqsave(&serial_table_lock, flags); 666 if (serial) 667 serial_table[index] = serial->parent; 668 else 669 serial_table[index] = NULL; 670 spin_unlock_irqrestore(&serial_table_lock, flags); 671} 672 673static void handle_usb_error(int status, const char *function, 674 struct hso_device *hso_dev) 675{ 676 char *explanation; 677 678 switch (status) { 679 case -ENODEV: 680 explanation = "no device"; 681 break; 682 case -ENOENT: 683 explanation = "endpoint not enabled"; 684 break; 685 case -EPIPE: 686 explanation = "endpoint stalled"; 687 break; 688 case -ENOSPC: 689 explanation = "not enough bandwidth"; 690 break; 691 case -ESHUTDOWN: 692 explanation = "device disabled"; 693 break; 694 case -EHOSTUNREACH: 695 explanation = "device suspended"; 696 break; 697 case -EINVAL: 698 case -EAGAIN: 699 case -EFBIG: 700 case -EMSGSIZE: 701 explanation = "internal error"; 702 break; 703 case -EILSEQ: 704 case -EPROTO: 705 case -ETIME: 706 case -ETIMEDOUT: 707 explanation = "protocol error"; 708 if (hso_dev) 709 schedule_work(&hso_dev->reset_device); 710 break; 711 default: 712 explanation = "unknown status"; 713 break; 714 } 715 716 /* log a meaningful explanation of an USB status */ 717 D1("%s: received USB status - %s (%d)", function, explanation, status); 718} 719 720/* Network interface functions */ 721 722/* called when net interface is brought up by ifconfig */ 723static int hso_net_open(struct net_device *net) 724{ 725 struct hso_net *odev = netdev_priv(net); 726 unsigned long flags = 0; 727 728 if (!odev) { 729 dev_err(&net->dev, "No net device !\n"); 730 return -ENODEV; 731 } 732 733 odev->skb_tx_buf = NULL; 734 735 /* setup environment */ 736 spin_lock_irqsave(&odev->net_lock, flags); 737 odev->rx_parse_state = WAIT_IP; 738 odev->rx_buf_size = 0; 739 odev->rx_buf_missing = sizeof(struct iphdr); 740 spin_unlock_irqrestore(&odev->net_lock, flags); 741 742 /* We are up and running. */ 743 set_bit(HSO_NET_RUNNING, &odev->flags); 744 hso_start_net_device(odev->parent); 745 746 /* Tell the kernel we are ready to start receiving from it */ 747 netif_start_queue(net); 748 749 return 0; 750} 751 752/* called when interface is brought down by ifconfig */ 753static int hso_net_close(struct net_device *net) 754{ 755 struct hso_net *odev = netdev_priv(net); 756 757 /* we don't need the queue anymore */ 758 netif_stop_queue(net); 759 /* no longer running */ 760 clear_bit(HSO_NET_RUNNING, &odev->flags); 761 762 hso_stop_net_device(odev->parent); 763 764 /* done */ 765 return 0; 766} 767 768/* USB tells is xmit done, we should start the netqueue again */ 769static void write_bulk_callback(struct urb *urb) 770{ 771 struct hso_net *odev = urb->context; 772 int status = urb->status; 773 774 /* Sanity check */ 775 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 776 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 777 return; 778 } 779 780 /* Do we still have a valid kernel network device? */ 781 if (!netif_device_present(odev->net)) { 782 dev_err(&urb->dev->dev, "%s: net device not present\n", 783 __func__); 784 return; 785 } 786 787 /* log status, but don't act on it, we don't need to resubmit anything 788 * anyhow */ 789 if (status) 790 handle_usb_error(status, __func__, odev->parent); 791 792 hso_put_activity(odev->parent); 793 794 /* Tell the network interface we are ready for another frame */ 795 netif_wake_queue(odev->net); 796} 797 798/* called by kernel when we need to transmit a packet */ 799static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 800 struct net_device *net) 801{ 802 struct hso_net *odev = netdev_priv(net); 803 int result; 804 805 /* Tell the kernel, "No more frames 'til we are done with this one." */ 806 netif_stop_queue(net); 807 if (hso_get_activity(odev->parent) == -EAGAIN) { 808 odev->skb_tx_buf = skb; 809 return NETDEV_TX_OK; 810 } 811 812 /* log if asked */ 813 DUMP1(skb->data, skb->len); 814 /* Copy it from kernel memory to OUR memory */ 815 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 816 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 817 818 /* Fill in the URB for shipping it out. */ 819 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 820 odev->parent->usb, 821 usb_sndbulkpipe(odev->parent->usb, 822 odev->out_endp-> 823 bEndpointAddress & 0x7F), 824 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 825 odev); 826 827 /* Deal with the Zero Length packet problem, I hope */ 828 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 829 830 /* Send the URB on its merry way. */ 831 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 832 if (result) { 833 dev_warn(&odev->parent->interface->dev, 834 "failed mux_bulk_tx_urb %d\n", result); 835 net->stats.tx_errors++; 836 netif_start_queue(net); 837 } else { 838 net->stats.tx_packets++; 839 net->stats.tx_bytes += skb->len; 840 } 841 dev_kfree_skb(skb); 842 /* we're done */ 843 return NETDEV_TX_OK; 844} 845 846static const struct ethtool_ops ops = { 847 .get_link = ethtool_op_get_link 848}; 849 850/* called when a packet did not ack after watchdogtimeout */ 851static void hso_net_tx_timeout(struct net_device *net) 852{ 853 struct hso_net *odev = netdev_priv(net); 854 855 if (!odev) 856 return; 857 858 /* Tell syslog we are hosed. */ 859 dev_warn(&net->dev, "Tx timed out.\n"); 860 861 /* Tear the waiting frame off the list */ 862 if (odev->mux_bulk_tx_urb && 863 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 864 usb_unlink_urb(odev->mux_bulk_tx_urb); 865 866 /* Update statistics */ 867 net->stats.tx_errors++; 868} 869 870/* make a real packet from the received USB buffer */ 871static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 872 unsigned int count, unsigned char is_eop) 873{ 874 unsigned short temp_bytes; 875 unsigned short buffer_offset = 0; 876 unsigned short frame_len; 877 unsigned char *tmp_rx_buf; 878 879 /* log if needed */ 880 D1("Rx %d bytes", count); 881 DUMP(ip_pkt, min(128, (int)count)); 882 883 while (count) { 884 switch (odev->rx_parse_state) { 885 case WAIT_IP: 886 /* waiting for IP header. */ 887 /* wanted bytes - size of ip header */ 888 temp_bytes = 889 (count < 890 odev->rx_buf_missing) ? count : odev-> 891 rx_buf_missing; 892 893 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 894 odev->rx_buf_size, ip_pkt + buffer_offset, 895 temp_bytes); 896 897 odev->rx_buf_size += temp_bytes; 898 buffer_offset += temp_bytes; 899 odev->rx_buf_missing -= temp_bytes; 900 count -= temp_bytes; 901 902 if (!odev->rx_buf_missing) { 903 /* header is complete allocate an sk_buffer and 904 * continue to WAIT_DATA */ 905 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 906 907 if ((frame_len > DEFAULT_MRU) || 908 (frame_len < sizeof(struct iphdr))) { 909 dev_err(&odev->net->dev, 910 "Invalid frame (%d) length\n", 911 frame_len); 912 odev->rx_parse_state = WAIT_SYNC; 913 continue; 914 } 915 /* Allocate an sk_buff */ 916 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 917 frame_len); 918 if (!odev->skb_rx_buf) { 919 /* We got no receive buffer. */ 920 D1("could not allocate memory"); 921 odev->rx_parse_state = WAIT_SYNC; 922 return; 923 } 924 925 /* Copy what we got so far. make room for iphdr 926 * after tail. */ 927 tmp_rx_buf = 928 skb_put(odev->skb_rx_buf, 929 sizeof(struct iphdr)); 930 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 931 sizeof(struct iphdr)); 932 933 /* ETH_HLEN */ 934 odev->rx_buf_size = sizeof(struct iphdr); 935 936 /* Filip actually use .tot_len */ 937 odev->rx_buf_missing = 938 frame_len - sizeof(struct iphdr); 939 odev->rx_parse_state = WAIT_DATA; 940 } 941 break; 942 943 case WAIT_DATA: 944 temp_bytes = (count < odev->rx_buf_missing) 945 ? count : odev->rx_buf_missing; 946 947 /* Copy the rest of the bytes that are left in the 948 * buffer into the waiting sk_buf. */ 949 /* Make room for temp_bytes after tail. */ 950 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 951 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 952 953 odev->rx_buf_missing -= temp_bytes; 954 count -= temp_bytes; 955 buffer_offset += temp_bytes; 956 odev->rx_buf_size += temp_bytes; 957 if (!odev->rx_buf_missing) { 958 /* Packet is complete. Inject into stack. */ 959 /* We have IP packet here */ 960 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 961 skb_reset_mac_header(odev->skb_rx_buf); 962 963 /* Ship it off to the kernel */ 964 netif_rx(odev->skb_rx_buf); 965 /* No longer our buffer. */ 966 odev->skb_rx_buf = NULL; 967 968 /* update out statistics */ 969 odev->net->stats.rx_packets++; 970 971 odev->net->stats.rx_bytes += odev->rx_buf_size; 972 973 odev->rx_buf_size = 0; 974 odev->rx_buf_missing = sizeof(struct iphdr); 975 odev->rx_parse_state = WAIT_IP; 976 } 977 break; 978 979 case WAIT_SYNC: 980 D1(" W_S"); 981 count = 0; 982 break; 983 default: 984 D1(" "); 985 count--; 986 break; 987 } 988 } 989 990 /* Recovery mechanism for WAIT_SYNC state. */ 991 if (is_eop) { 992 if (odev->rx_parse_state == WAIT_SYNC) { 993 odev->rx_parse_state = WAIT_IP; 994 odev->rx_buf_size = 0; 995 odev->rx_buf_missing = sizeof(struct iphdr); 996 } 997 } 998} 999 1000static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 1001{ 1002 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1003 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 1004 1005 if (((rest == 5) || (rest == 6)) && 1006 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 1007 crc_check, 4)) { 1008 urb->actual_length -= 4; 1009 } 1010} 1011 1012/* Moving data from usb to kernel (in interrupt state) */ 1013static void read_bulk_callback(struct urb *urb) 1014{ 1015 struct hso_net *odev = urb->context; 1016 struct net_device *net; 1017 int result; 1018 int status = urb->status; 1019 1020 /* is al ok? (Filip: Who's Al ?) */ 1021 if (status) { 1022 handle_usb_error(status, __func__, odev->parent); 1023 return; 1024 } 1025 1026 /* Sanity check */ 1027 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1028 D1("BULK IN callback but driver is not active!"); 1029 return; 1030 } 1031 usb_mark_last_busy(urb->dev); 1032 1033 net = odev->net; 1034 1035 if (!netif_device_present(net)) { 1036 /* Somebody killed our network interface... */ 1037 return; 1038 } 1039 1040 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1041 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1042 1043 /* do we even have a packet? */ 1044 if (urb->actual_length) { 1045 /* Handle the IP stream, add header and push it onto network 1046 * stack if the packet is complete. */ 1047 spin_lock(&odev->net_lock); 1048 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1049 (urb->transfer_buffer_length > 1050 urb->actual_length) ? 1 : 0); 1051 spin_unlock(&odev->net_lock); 1052 } 1053 1054 /* We are done with this URB, resubmit it. Prep the USB to wait for 1055 * another frame. Reuse same as received. */ 1056 usb_fill_bulk_urb(urb, 1057 odev->parent->usb, 1058 usb_rcvbulkpipe(odev->parent->usb, 1059 odev->in_endp-> 1060 bEndpointAddress & 0x7F), 1061 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1062 read_bulk_callback, odev); 1063 1064 /* Give this to the USB subsystem so it can tell us when more data 1065 * arrives. */ 1066 result = usb_submit_urb(urb, GFP_ATOMIC); 1067 if (result) 1068 dev_warn(&odev->parent->interface->dev, 1069 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1070 result); 1071} 1072 1073/* Serial driver functions */ 1074 1075static void hso_init_termios(struct ktermios *termios) 1076{ 1077 /* 1078 * The default requirements for this device are: 1079 */ 1080 termios->c_iflag &= 1081 ~(IGNBRK /* disable ignore break */ 1082 | BRKINT /* disable break causes interrupt */ 1083 | PARMRK /* disable mark parity errors */ 1084 | ISTRIP /* disable clear high bit of input characters */ 1085 | INLCR /* disable translate NL to CR */ 1086 | IGNCR /* disable ignore CR */ 1087 | ICRNL /* disable translate CR to NL */ 1088 | IXON); /* disable enable XON/XOFF flow control */ 1089 1090 /* disable postprocess output characters */ 1091 termios->c_oflag &= ~OPOST; 1092 1093 termios->c_lflag &= 1094 ~(ECHO /* disable echo input characters */ 1095 | ECHONL /* disable echo new line */ 1096 | ICANON /* disable erase, kill, werase, and rprnt 1097 special characters */ 1098 | ISIG /* disable interrupt, quit, and suspend special 1099 characters */ 1100 | IEXTEN); /* disable non-POSIX special characters */ 1101 1102 termios->c_cflag &= 1103 ~(CSIZE /* no size */ 1104 | PARENB /* disable parity bit */ 1105 | CBAUD /* clear current baud rate */ 1106 | CBAUDEX); /* clear current buad rate */ 1107 1108 termios->c_cflag |= CS8; /* character size 8 bits */ 1109 1110 /* baud rate 115200 */ 1111 tty_termios_encode_baud_rate(termios, 115200, 115200); 1112} 1113 1114static void _hso_serial_set_termios(struct tty_struct *tty, 1115 struct ktermios *old) 1116{ 1117 struct hso_serial *serial = get_serial_by_tty(tty); 1118 struct ktermios *termios; 1119 1120 if (!serial) { 1121 printk(KERN_ERR "%s: no tty structures", __func__); 1122 return; 1123 } 1124 1125 D4("port %d", serial->minor); 1126 1127 /* 1128 * Fix up unsupported bits 1129 */ 1130 termios = tty->termios; 1131 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1132 1133 termios->c_cflag &= 1134 ~(CSIZE /* no size */ 1135 | PARENB /* disable parity bit */ 1136 | CBAUD /* clear current baud rate */ 1137 | CBAUDEX); /* clear current buad rate */ 1138 1139 termios->c_cflag |= CS8; /* character size 8 bits */ 1140 1141 /* baud rate 115200 */ 1142 tty_encode_baud_rate(tty, 115200, 115200); 1143} 1144 1145static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1146{ 1147 int result; 1148 /* We are done with this URB, resubmit it. Prep the USB to wait for 1149 * another frame */ 1150 usb_fill_bulk_urb(urb, serial->parent->usb, 1151 usb_rcvbulkpipe(serial->parent->usb, 1152 serial->in_endp-> 1153 bEndpointAddress & 0x7F), 1154 urb->transfer_buffer, serial->rx_data_length, 1155 hso_std_serial_read_bulk_callback, serial); 1156 /* Give this to the USB subsystem so it can tell us when more data 1157 * arrives. */ 1158 result = usb_submit_urb(urb, GFP_ATOMIC); 1159 if (result) { 1160 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1161 __func__, result); 1162 } 1163} 1164 1165 1166 1167 1168static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1169{ 1170 int count; 1171 struct urb *curr_urb; 1172 1173 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1174 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1175 count = put_rxbuf_data(curr_urb, serial); 1176 if (count == -1) 1177 return; 1178 if (count == 0) { 1179 serial->curr_rx_urb_idx++; 1180 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1181 serial->curr_rx_urb_idx = 0; 1182 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1183 } 1184 } 1185} 1186 1187static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1188{ 1189 int count = 0; 1190 struct urb *urb; 1191 1192 urb = serial->rx_urb[0]; 1193 if (serial->open_count > 0) { 1194 count = put_rxbuf_data(urb, serial); 1195 if (count == -1) 1196 return; 1197 } 1198 /* Re issue a read as long as we receive data. */ 1199 1200 if (count == 0 && ((urb->actual_length != 0) || 1201 (serial->rx_state == RX_PENDING))) { 1202 serial->rx_state = RX_SENT; 1203 hso_mux_serial_read(serial); 1204 } else 1205 serial->rx_state = RX_IDLE; 1206} 1207 1208 1209/* read callback for Diag and CS port */ 1210static void hso_std_serial_read_bulk_callback(struct urb *urb) 1211{ 1212 struct hso_serial *serial = urb->context; 1213 int status = urb->status; 1214 1215 /* sanity check */ 1216 if (!serial) { 1217 D1("serial == NULL"); 1218 return; 1219 } else if (status) { 1220 handle_usb_error(status, __func__, serial->parent); 1221 return; 1222 } 1223 1224 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1225 D1("Actual length = %d\n", urb->actual_length); 1226 DUMP1(urb->transfer_buffer, urb->actual_length); 1227 1228 /* Anyone listening? */ 1229 if (serial->open_count == 0) 1230 return; 1231 1232 if (status == 0) { 1233 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1234 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1235 /* Valid data, handle RX data */ 1236 spin_lock(&serial->serial_lock); 1237 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1238 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1239 spin_unlock(&serial->serial_lock); 1240 } else if (status == -ENOENT || status == -ECONNRESET) { 1241 /* Unlinked - check for throttled port. */ 1242 D2("Port %d, successfully unlinked urb", serial->minor); 1243 spin_lock(&serial->serial_lock); 1244 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1245 hso_resubmit_rx_bulk_urb(serial, urb); 1246 spin_unlock(&serial->serial_lock); 1247 } else { 1248 D2("Port %d, status = %d for read urb", serial->minor, status); 1249 return; 1250 } 1251} 1252 1253/* 1254 * This needs to be a tasklet otherwise we will 1255 * end up recursively calling this function. 1256 */ 1257static void hso_unthrottle_tasklet(struct hso_serial *serial) 1258{ 1259 unsigned long flags; 1260 1261 spin_lock_irqsave(&serial->serial_lock, flags); 1262 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1263 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1264 else 1265 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1266 spin_unlock_irqrestore(&serial->serial_lock, flags); 1267} 1268 1269static void hso_unthrottle(struct tty_struct *tty) 1270{ 1271 struct hso_serial *serial = get_serial_by_tty(tty); 1272 1273 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1274} 1275 1276static void hso_unthrottle_workfunc(struct work_struct *work) 1277{ 1278 struct hso_serial *serial = 1279 container_of(work, struct hso_serial, 1280 retry_unthrottle_workqueue); 1281 hso_unthrottle_tasklet(serial); 1282} 1283 1284/* open the requested serial port */ 1285static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1286{ 1287 struct hso_serial *serial = get_serial_by_index(tty->index); 1288 int result; 1289 1290 /* sanity check */ 1291 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1292 WARN_ON(1); 1293 tty->driver_data = NULL; 1294 D1("Failed to open port"); 1295 return -ENODEV; 1296 } 1297 1298 mutex_lock(&serial->parent->mutex); 1299 result = usb_autopm_get_interface(serial->parent->interface); 1300 if (result < 0) 1301 goto err_out; 1302 1303 D1("Opening %d", serial->minor); 1304 kref_get(&serial->parent->ref); 1305 1306 /* setup */ 1307 spin_lock_irq(&serial->serial_lock); 1308 tty->driver_data = serial; 1309 tty_kref_put(serial->tty); 1310 serial->tty = tty_kref_get(tty); 1311 spin_unlock_irq(&serial->serial_lock); 1312 1313 /* check for port already opened, if not set the termios */ 1314 serial->open_count++; 1315 if (serial->open_count == 1) { 1316 serial->rx_state = RX_IDLE; 1317 /* Force default termio settings */ 1318 _hso_serial_set_termios(tty, NULL); 1319 tasklet_init(&serial->unthrottle_tasklet, 1320 (void (*)(unsigned long))hso_unthrottle_tasklet, 1321 (unsigned long)serial); 1322 INIT_WORK(&serial->retry_unthrottle_workqueue, 1323 hso_unthrottle_workfunc); 1324 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1325 if (result) { 1326 hso_stop_serial_device(serial->parent); 1327 serial->open_count--; 1328 kref_put(&serial->parent->ref, hso_serial_ref_free); 1329 } 1330 } else { 1331 D1("Port was already open"); 1332 } 1333 1334 usb_autopm_put_interface(serial->parent->interface); 1335 1336 /* done */ 1337 if (result) 1338 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1339err_out: 1340 mutex_unlock(&serial->parent->mutex); 1341 return result; 1342} 1343 1344/* close the requested serial port */ 1345static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1346{ 1347 struct hso_serial *serial = tty->driver_data; 1348 u8 usb_gone; 1349 1350 D1("Closing serial port"); 1351 1352 /* Open failed, no close cleanup required */ 1353 if (serial == NULL) 1354 return; 1355 1356 mutex_lock(&serial->parent->mutex); 1357 usb_gone = serial->parent->usb_gone; 1358 1359 if (!usb_gone) 1360 usb_autopm_get_interface(serial->parent->interface); 1361 1362 /* reset the rts and dtr */ 1363 /* do the actual close */ 1364 serial->open_count--; 1365 1366 if (serial->open_count <= 0) { 1367 serial->open_count = 0; 1368 spin_lock_irq(&serial->serial_lock); 1369 if (serial->tty == tty) { 1370 serial->tty->driver_data = NULL; 1371 serial->tty = NULL; 1372 tty_kref_put(tty); 1373 } 1374 spin_unlock_irq(&serial->serial_lock); 1375 if (!usb_gone) 1376 hso_stop_serial_device(serial->parent); 1377 tasklet_kill(&serial->unthrottle_tasklet); 1378 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1379 } 1380 1381 if (!usb_gone) 1382 usb_autopm_put_interface(serial->parent->interface); 1383 1384 mutex_unlock(&serial->parent->mutex); 1385 1386 kref_put(&serial->parent->ref, hso_serial_ref_free); 1387} 1388 1389/* close the requested serial port */ 1390static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1391 int count) 1392{ 1393 struct hso_serial *serial = get_serial_by_tty(tty); 1394 int space, tx_bytes; 1395 unsigned long flags; 1396 1397 /* sanity check */ 1398 if (serial == NULL) { 1399 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1400 return -ENODEV; 1401 } 1402 1403 spin_lock_irqsave(&serial->serial_lock, flags); 1404 1405 space = serial->tx_data_length - serial->tx_buffer_count; 1406 tx_bytes = (count < space) ? count : space; 1407 1408 if (!tx_bytes) 1409 goto out; 1410 1411 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1412 serial->tx_buffer_count += tx_bytes; 1413 1414out: 1415 spin_unlock_irqrestore(&serial->serial_lock, flags); 1416 1417 hso_kick_transmit(serial); 1418 /* done */ 1419 return tx_bytes; 1420} 1421 1422/* how much room is there for writing */ 1423static int hso_serial_write_room(struct tty_struct *tty) 1424{ 1425 struct hso_serial *serial = get_serial_by_tty(tty); 1426 int room; 1427 unsigned long flags; 1428 1429 spin_lock_irqsave(&serial->serial_lock, flags); 1430 room = serial->tx_data_length - serial->tx_buffer_count; 1431 spin_unlock_irqrestore(&serial->serial_lock, flags); 1432 1433 /* return free room */ 1434 return room; 1435} 1436 1437/* setup the term */ 1438static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1439{ 1440 struct hso_serial *serial = get_serial_by_tty(tty); 1441 unsigned long flags; 1442 1443 if (old) 1444 D5("Termios called with: cflags new[%d] - old[%d]", 1445 tty->termios->c_cflag, old->c_cflag); 1446 1447 /* the actual setup */ 1448 spin_lock_irqsave(&serial->serial_lock, flags); 1449 if (serial->open_count) 1450 _hso_serial_set_termios(tty, old); 1451 else 1452 tty->termios = old; 1453 spin_unlock_irqrestore(&serial->serial_lock, flags); 1454 1455 /* done */ 1456} 1457 1458/* how many characters in the buffer */ 1459static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1460{ 1461 struct hso_serial *serial = get_serial_by_tty(tty); 1462 int chars; 1463 unsigned long flags; 1464 1465 /* sanity check */ 1466 if (serial == NULL) 1467 return 0; 1468 1469 spin_lock_irqsave(&serial->serial_lock, flags); 1470 chars = serial->tx_buffer_count; 1471 spin_unlock_irqrestore(&serial->serial_lock, flags); 1472 1473 return chars; 1474} 1475static int tiocmget_submit_urb(struct hso_serial *serial, 1476 struct hso_tiocmget *tiocmget, 1477 struct usb_device *usb) 1478{ 1479 int result; 1480 1481 if (serial->parent->usb_gone) 1482 return -ENODEV; 1483 usb_fill_int_urb(tiocmget->urb, usb, 1484 usb_rcvintpipe(usb, 1485 tiocmget->endp-> 1486 bEndpointAddress & 0x7F), 1487 &tiocmget->serial_state_notification, 1488 sizeof(struct hso_serial_state_notification), 1489 tiocmget_intr_callback, serial, 1490 tiocmget->endp->bInterval); 1491 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1492 if (result) { 1493 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1494 result); 1495 } 1496 return result; 1497 1498} 1499 1500static void tiocmget_intr_callback(struct urb *urb) 1501{ 1502 struct hso_serial *serial = urb->context; 1503 struct hso_tiocmget *tiocmget; 1504 int status = urb->status; 1505 u16 UART_state_bitmap, prev_UART_state_bitmap; 1506 struct uart_icount *icount; 1507 struct hso_serial_state_notification *serial_state_notification; 1508 struct usb_device *usb; 1509 1510 /* Sanity checks */ 1511 if (!serial) 1512 return; 1513 if (status) { 1514 handle_usb_error(status, __func__, serial->parent); 1515 return; 1516 } 1517 tiocmget = serial->tiocmget; 1518 if (!tiocmget) 1519 return; 1520 usb = serial->parent->usb; 1521 serial_state_notification = &tiocmget->serial_state_notification; 1522 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1523 serial_state_notification->bNotification != B_NOTIFICATION || 1524 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1525 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX || 1526 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1527 dev_warn(&usb->dev, 1528 "hso received invalid serial state notification\n"); 1529 DUMP(serial_state_notification, 1530 sizeof(struct hso_serial_state_notification)); 1531 } else { 1532 1533 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1534 UART_state_bitmap); 1535 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1536 icount = &tiocmget->icount; 1537 spin_lock(&serial->serial_lock); 1538 if ((UART_state_bitmap & B_OVERRUN) != 1539 (prev_UART_state_bitmap & B_OVERRUN)) 1540 icount->parity++; 1541 if ((UART_state_bitmap & B_PARITY) != 1542 (prev_UART_state_bitmap & B_PARITY)) 1543 icount->parity++; 1544 if ((UART_state_bitmap & B_FRAMING) != 1545 (prev_UART_state_bitmap & B_FRAMING)) 1546 icount->frame++; 1547 if ((UART_state_bitmap & B_RING_SIGNAL) && 1548 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1549 icount->rng++; 1550 if ((UART_state_bitmap & B_BREAK) != 1551 (prev_UART_state_bitmap & B_BREAK)) 1552 icount->brk++; 1553 if ((UART_state_bitmap & B_TX_CARRIER) != 1554 (prev_UART_state_bitmap & B_TX_CARRIER)) 1555 icount->dsr++; 1556 if ((UART_state_bitmap & B_RX_CARRIER) != 1557 (prev_UART_state_bitmap & B_RX_CARRIER)) 1558 icount->dcd++; 1559 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1560 spin_unlock(&serial->serial_lock); 1561 tiocmget->intr_completed = 1; 1562 wake_up_interruptible(&tiocmget->waitq); 1563 } 1564 memset(serial_state_notification, 0, 1565 sizeof(struct hso_serial_state_notification)); 1566 tiocmget_submit_urb(serial, 1567 tiocmget, 1568 serial->parent->usb); 1569} 1570 1571/* 1572 * next few functions largely stolen from drivers/serial/serial_core.c 1573 */ 1574/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1575 * - mask passed in arg for lines of interest 1576 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1577 * Caller should use TIOCGICOUNT to see which one it was 1578 */ 1579static int 1580hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1581{ 1582 DECLARE_WAITQUEUE(wait, current); 1583 struct uart_icount cprev, cnow; 1584 struct hso_tiocmget *tiocmget; 1585 int ret; 1586 1587 tiocmget = serial->tiocmget; 1588 if (!tiocmget) 1589 return -ENOENT; 1590 /* 1591 * note the counters on entry 1592 */ 1593 spin_lock_irq(&serial->serial_lock); 1594 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1595 spin_unlock_irq(&serial->serial_lock); 1596 add_wait_queue(&tiocmget->waitq, &wait); 1597 for (;;) { 1598 spin_lock_irq(&serial->serial_lock); 1599 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1600 spin_unlock_irq(&serial->serial_lock); 1601 set_current_state(TASK_INTERRUPTIBLE); 1602 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1603 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1604 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1605 ret = 0; 1606 break; 1607 } 1608 schedule(); 1609 /* see if a signal did it */ 1610 if (signal_pending(current)) { 1611 ret = -ERESTARTSYS; 1612 break; 1613 } 1614 cprev = cnow; 1615 } 1616 current->state = TASK_RUNNING; 1617 remove_wait_queue(&tiocmget->waitq, &wait); 1618 1619 return ret; 1620} 1621 1622/* 1623 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1624 * Return: write counters to the user passed counter struct 1625 * NB: both 1->0 and 0->1 transitions are counted except for 1626 * RI where only 0->1 is counted. 1627 */ 1628static int hso_get_count(struct tty_struct *tty, 1629 struct serial_icounter_struct *icount) 1630{ 1631 struct uart_icount cnow; 1632 struct hso_serial *serial = get_serial_by_tty(tty); 1633 struct hso_tiocmget *tiocmget = serial->tiocmget; 1634 1635 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1636 1637 if (!tiocmget) 1638 return -ENOENT; 1639 spin_lock_irq(&serial->serial_lock); 1640 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1641 spin_unlock_irq(&serial->serial_lock); 1642 1643 icount->cts = cnow.cts; 1644 icount->dsr = cnow.dsr; 1645 icount->rng = cnow.rng; 1646 icount->dcd = cnow.dcd; 1647 icount->rx = cnow.rx; 1648 icount->tx = cnow.tx; 1649 icount->frame = cnow.frame; 1650 icount->overrun = cnow.overrun; 1651 icount->parity = cnow.parity; 1652 icount->brk = cnow.brk; 1653 icount->buf_overrun = cnow.buf_overrun; 1654 1655 return 0; 1656} 1657 1658 1659static int hso_serial_tiocmget(struct tty_struct *tty) 1660{ 1661 int retval; 1662 struct hso_serial *serial = get_serial_by_tty(tty); 1663 struct hso_tiocmget *tiocmget; 1664 u16 UART_state_bitmap; 1665 1666 /* sanity check */ 1667 if (!serial) { 1668 D1("no tty structures"); 1669 return -EINVAL; 1670 } 1671 spin_lock_irq(&serial->serial_lock); 1672 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1673 ((serial->dtr_state) ? TIOCM_DTR : 0); 1674 tiocmget = serial->tiocmget; 1675 if (tiocmget) { 1676 1677 UART_state_bitmap = le16_to_cpu( 1678 tiocmget->prev_UART_state_bitmap); 1679 if (UART_state_bitmap & B_RING_SIGNAL) 1680 retval |= TIOCM_RNG; 1681 if (UART_state_bitmap & B_RX_CARRIER) 1682 retval |= TIOCM_CD; 1683 if (UART_state_bitmap & B_TX_CARRIER) 1684 retval |= TIOCM_DSR; 1685 } 1686 spin_unlock_irq(&serial->serial_lock); 1687 return retval; 1688} 1689 1690static int hso_serial_tiocmset(struct tty_struct *tty, 1691 unsigned int set, unsigned int clear) 1692{ 1693 int val = 0; 1694 unsigned long flags; 1695 int if_num; 1696 struct hso_serial *serial = get_serial_by_tty(tty); 1697 1698 /* sanity check */ 1699 if (!serial) { 1700 D1("no tty structures"); 1701 return -EINVAL; 1702 } 1703 1704 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1705 return -EINVAL; 1706 1707 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1708 1709 spin_lock_irqsave(&serial->serial_lock, flags); 1710 if (set & TIOCM_RTS) 1711 serial->rts_state = 1; 1712 if (set & TIOCM_DTR) 1713 serial->dtr_state = 1; 1714 1715 if (clear & TIOCM_RTS) 1716 serial->rts_state = 0; 1717 if (clear & TIOCM_DTR) 1718 serial->dtr_state = 0; 1719 1720 if (serial->dtr_state) 1721 val |= 0x01; 1722 if (serial->rts_state) 1723 val |= 0x02; 1724 1725 spin_unlock_irqrestore(&serial->serial_lock, flags); 1726 1727 return usb_control_msg(serial->parent->usb, 1728 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1729 0x21, val, if_num, NULL, 0, 1730 USB_CTRL_SET_TIMEOUT); 1731} 1732 1733static int hso_serial_ioctl(struct tty_struct *tty, 1734 unsigned int cmd, unsigned long arg) 1735{ 1736 struct hso_serial *serial = get_serial_by_tty(tty); 1737 int ret = 0; 1738 D4("IOCTL cmd: %d, arg: %ld", cmd, arg); 1739 1740 if (!serial) 1741 return -ENODEV; 1742 switch (cmd) { 1743 case TIOCMIWAIT: 1744 ret = hso_wait_modem_status(serial, arg); 1745 break; 1746 default: 1747 ret = -ENOIOCTLCMD; 1748 break; 1749 } 1750 return ret; 1751} 1752 1753 1754/* starts a transmit */ 1755static void hso_kick_transmit(struct hso_serial *serial) 1756{ 1757 u8 *temp; 1758 unsigned long flags; 1759 int res; 1760 1761 spin_lock_irqsave(&serial->serial_lock, flags); 1762 if (!serial->tx_buffer_count) 1763 goto out; 1764 1765 if (serial->tx_urb_used) 1766 goto out; 1767 1768 /* Wakeup USB interface if necessary */ 1769 if (hso_get_activity(serial->parent) == -EAGAIN) 1770 goto out; 1771 1772 /* Switch pointers around to avoid memcpy */ 1773 temp = serial->tx_buffer; 1774 serial->tx_buffer = serial->tx_data; 1775 serial->tx_data = temp; 1776 serial->tx_data_count = serial->tx_buffer_count; 1777 serial->tx_buffer_count = 0; 1778 1779 /* If temp is set, it means we switched buffers */ 1780 if (temp && serial->write_data) { 1781 res = serial->write_data(serial); 1782 if (res >= 0) 1783 serial->tx_urb_used = 1; 1784 } 1785out: 1786 spin_unlock_irqrestore(&serial->serial_lock, flags); 1787} 1788 1789/* make a request (for reading and writing data to muxed serial port) */ 1790static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1791 struct urb *ctrl_urb, 1792 struct usb_ctrlrequest *ctrl_req, 1793 u8 *ctrl_urb_data, u32 size) 1794{ 1795 int result; 1796 int pipe; 1797 1798 /* Sanity check */ 1799 if (!serial || !ctrl_urb || !ctrl_req) { 1800 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1801 return -EINVAL; 1802 } 1803 1804 /* initialize */ 1805 ctrl_req->wValue = 0; 1806 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1807 ctrl_req->wLength = cpu_to_le16(size); 1808 1809 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1810 /* Reading command */ 1811 ctrl_req->bRequestType = USB_DIR_IN | 1812 USB_TYPE_OPTION_VENDOR | 1813 USB_RECIP_INTERFACE; 1814 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1815 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1816 } else { 1817 /* Writing command */ 1818 ctrl_req->bRequestType = USB_DIR_OUT | 1819 USB_TYPE_OPTION_VENDOR | 1820 USB_RECIP_INTERFACE; 1821 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1822 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1823 } 1824 /* syslog */ 1825 D2("%s command (%02x) len: %d, port: %d", 1826 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1827 ctrl_req->bRequestType, ctrl_req->wLength, port); 1828 1829 /* Load ctrl urb */ 1830 ctrl_urb->transfer_flags = 0; 1831 usb_fill_control_urb(ctrl_urb, 1832 serial->parent->usb, 1833 pipe, 1834 (u8 *) ctrl_req, 1835 ctrl_urb_data, size, ctrl_callback, serial); 1836 /* Send it on merry way */ 1837 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1838 if (result) { 1839 dev_err(&ctrl_urb->dev->dev, 1840 "%s failed submit ctrl_urb %d type %d\n", __func__, 1841 result, type); 1842 return result; 1843 } 1844 1845 /* done */ 1846 return size; 1847} 1848 1849/* called by intr_callback when read occurs */ 1850static int hso_mux_serial_read(struct hso_serial *serial) 1851{ 1852 if (!serial) 1853 return -EINVAL; 1854 1855 /* clean data */ 1856 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1857 /* make the request */ 1858 1859 if (serial->num_rx_urbs != 1) { 1860 dev_err(&serial->parent->interface->dev, 1861 "ERROR: mux'd reads with multiple buffers " 1862 "not possible\n"); 1863 return 0; 1864 } 1865 return mux_device_request(serial, 1866 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1867 serial->parent->port_spec & HSO_PORT_MASK, 1868 serial->rx_urb[0], 1869 &serial->ctrl_req_rx, 1870 serial->rx_data[0], serial->rx_data_length); 1871} 1872 1873/* used for muxed serial port callback (muxed serial read) */ 1874static void intr_callback(struct urb *urb) 1875{ 1876 struct hso_shared_int *shared_int = urb->context; 1877 struct hso_serial *serial; 1878 unsigned char *port_req; 1879 int status = urb->status; 1880 int i; 1881 1882 usb_mark_last_busy(urb->dev); 1883 1884 /* sanity check */ 1885 if (!shared_int) 1886 return; 1887 1888 /* status check */ 1889 if (status) { 1890 handle_usb_error(status, __func__, NULL); 1891 return; 1892 } 1893 D4("\n--- Got intr callback 0x%02X ---", status); 1894 1895 /* what request? */ 1896 port_req = urb->transfer_buffer; 1897 D4(" port_req = 0x%.2X\n", *port_req); 1898 /* loop over all muxed ports to find the one sending this */ 1899 for (i = 0; i < 8; i++) { 1900 /* max 8 channels on MUX */ 1901 if (*port_req & (1 << i)) { 1902 serial = get_serial_by_shared_int_and_type(shared_int, 1903 (1 << i)); 1904 if (serial != NULL) { 1905 D1("Pending read interrupt on port %d\n", i); 1906 spin_lock(&serial->serial_lock); 1907 if (serial->rx_state == RX_IDLE && 1908 serial->open_count > 0) { 1909 /* Setup and send a ctrl req read on 1910 * port i */ 1911 if (!serial->rx_urb_filled[0]) { 1912 serial->rx_state = RX_SENT; 1913 hso_mux_serial_read(serial); 1914 } else 1915 serial->rx_state = RX_PENDING; 1916 } else { 1917 D1("Already a read pending on " 1918 "port %d or port not open\n", i); 1919 } 1920 spin_unlock(&serial->serial_lock); 1921 } 1922 } 1923 } 1924 /* Resubmit interrupt urb */ 1925 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1926} 1927 1928/* called for writing to muxed serial port */ 1929static int hso_mux_serial_write_data(struct hso_serial *serial) 1930{ 1931 if (NULL == serial) 1932 return -EINVAL; 1933 1934 return mux_device_request(serial, 1935 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1936 serial->parent->port_spec & HSO_PORT_MASK, 1937 serial->tx_urb, 1938 &serial->ctrl_req_tx, 1939 serial->tx_data, serial->tx_data_count); 1940} 1941 1942/* write callback for Diag and CS port */ 1943static void hso_std_serial_write_bulk_callback(struct urb *urb) 1944{ 1945 struct hso_serial *serial = urb->context; 1946 int status = urb->status; 1947 struct tty_struct *tty; 1948 1949 /* sanity check */ 1950 if (!serial) { 1951 D1("serial == NULL"); 1952 return; 1953 } 1954 1955 spin_lock(&serial->serial_lock); 1956 serial->tx_urb_used = 0; 1957 tty = tty_kref_get(serial->tty); 1958 spin_unlock(&serial->serial_lock); 1959 if (status) { 1960 handle_usb_error(status, __func__, serial->parent); 1961 tty_kref_put(tty); 1962 return; 1963 } 1964 hso_put_activity(serial->parent); 1965 if (tty) { 1966 tty_wakeup(tty); 1967 tty_kref_put(tty); 1968 } 1969 hso_kick_transmit(serial); 1970 1971 D1(" "); 1972} 1973 1974/* called for writing diag or CS serial port */ 1975static int hso_std_serial_write_data(struct hso_serial *serial) 1976{ 1977 int count = serial->tx_data_count; 1978 int result; 1979 1980 usb_fill_bulk_urb(serial->tx_urb, 1981 serial->parent->usb, 1982 usb_sndbulkpipe(serial->parent->usb, 1983 serial->out_endp-> 1984 bEndpointAddress & 0x7F), 1985 serial->tx_data, serial->tx_data_count, 1986 hso_std_serial_write_bulk_callback, serial); 1987 1988 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1989 if (result) { 1990 dev_warn(&serial->parent->usb->dev, 1991 "Failed to submit urb - res %d\n", result); 1992 return result; 1993 } 1994 1995 return count; 1996} 1997 1998/* callback after read or write on muxed serial port */ 1999static void ctrl_callback(struct urb *urb) 2000{ 2001 struct hso_serial *serial = urb->context; 2002 struct usb_ctrlrequest *req; 2003 int status = urb->status; 2004 struct tty_struct *tty; 2005 2006 /* sanity check */ 2007 if (!serial) 2008 return; 2009 2010 spin_lock(&serial->serial_lock); 2011 serial->tx_urb_used = 0; 2012 tty = tty_kref_get(serial->tty); 2013 spin_unlock(&serial->serial_lock); 2014 if (status) { 2015 handle_usb_error(status, __func__, serial->parent); 2016 tty_kref_put(tty); 2017 return; 2018 } 2019 2020 /* what request? */ 2021 req = (struct usb_ctrlrequest *)(urb->setup_packet); 2022 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 2023 D4("Actual length of urb = %d\n", urb->actual_length); 2024 DUMP1(urb->transfer_buffer, urb->actual_length); 2025 2026 if (req->bRequestType == 2027 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 2028 /* response to a read command */ 2029 serial->rx_urb_filled[0] = 1; 2030 spin_lock(&serial->serial_lock); 2031 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2032 spin_unlock(&serial->serial_lock); 2033 } else { 2034 hso_put_activity(serial->parent); 2035 if (tty) 2036 tty_wakeup(tty); 2037 /* response to a write command */ 2038 hso_kick_transmit(serial); 2039 } 2040 tty_kref_put(tty); 2041} 2042 2043/* handle RX data for serial port */ 2044static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2045{ 2046 struct tty_struct *tty; 2047 int write_length_remaining = 0; 2048 int curr_write_len; 2049 2050 /* Sanity check */ 2051 if (urb == NULL || serial == NULL) { 2052 D1("serial = NULL"); 2053 return -2; 2054 } 2055 2056 /* All callers to put_rxbuf_data hold serial_lock */ 2057 tty = tty_kref_get(serial->tty); 2058 2059 /* Push data to tty */ 2060 if (tty) { 2061 write_length_remaining = urb->actual_length - 2062 serial->curr_rx_urb_offset; 2063 D1("data to push to tty"); 2064 while (write_length_remaining) { 2065 if (test_bit(TTY_THROTTLED, &tty->flags)) { 2066 tty_kref_put(tty); 2067 return -1; 2068 } 2069 curr_write_len = tty_insert_flip_string 2070 (tty, urb->transfer_buffer + 2071 serial->curr_rx_urb_offset, 2072 write_length_remaining); 2073 serial->curr_rx_urb_offset += curr_write_len; 2074 write_length_remaining -= curr_write_len; 2075 tty_flip_buffer_push(tty); 2076 } 2077 } 2078 if (write_length_remaining == 0) { 2079 serial->curr_rx_urb_offset = 0; 2080 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2081 } 2082 tty_kref_put(tty); 2083 return write_length_remaining; 2084} 2085 2086 2087/* Base driver functions */ 2088 2089static void hso_log_port(struct hso_device *hso_dev) 2090{ 2091 char *port_type; 2092 char port_dev[20]; 2093 2094 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2095 case HSO_PORT_CONTROL: 2096 port_type = "Control"; 2097 break; 2098 case HSO_PORT_APP: 2099 port_type = "Application"; 2100 break; 2101 case HSO_PORT_GPS: 2102 port_type = "GPS"; 2103 break; 2104 case HSO_PORT_GPS_CONTROL: 2105 port_type = "GPS control"; 2106 break; 2107 case HSO_PORT_APP2: 2108 port_type = "Application2"; 2109 break; 2110 case HSO_PORT_PCSC: 2111 port_type = "PCSC"; 2112 break; 2113 case HSO_PORT_DIAG: 2114 port_type = "Diagnostic"; 2115 break; 2116 case HSO_PORT_DIAG2: 2117 port_type = "Diagnostic2"; 2118 break; 2119 case HSO_PORT_MODEM: 2120 port_type = "Modem"; 2121 break; 2122 case HSO_PORT_NETWORK: 2123 port_type = "Network"; 2124 break; 2125 default: 2126 port_type = "Unknown"; 2127 break; 2128 } 2129 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2130 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2131 } else 2132 sprintf(port_dev, "/dev/%s%d", tty_filename, 2133 dev2ser(hso_dev)->minor); 2134 2135 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2136 port_type, port_dev); 2137} 2138 2139static int hso_start_net_device(struct hso_device *hso_dev) 2140{ 2141 int i, result = 0; 2142 struct hso_net *hso_net = dev2net(hso_dev); 2143 2144 if (!hso_net) 2145 return -ENODEV; 2146 2147 /* send URBs for all read buffers */ 2148 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2149 2150 /* Prep a receive URB */ 2151 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2152 hso_dev->usb, 2153 usb_rcvbulkpipe(hso_dev->usb, 2154 hso_net->in_endp-> 2155 bEndpointAddress & 0x7F), 2156 hso_net->mux_bulk_rx_buf_pool[i], 2157 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2158 hso_net); 2159 2160 /* Put it out there so the device can send us stuff */ 2161 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2162 GFP_NOIO); 2163 if (result) 2164 dev_warn(&hso_dev->usb->dev, 2165 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2166 i, result); 2167 } 2168 2169 return result; 2170} 2171 2172static int hso_stop_net_device(struct hso_device *hso_dev) 2173{ 2174 int i; 2175 struct hso_net *hso_net = dev2net(hso_dev); 2176 2177 if (!hso_net) 2178 return -ENODEV; 2179 2180 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2181 if (hso_net->mux_bulk_rx_urb_pool[i]) 2182 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2183 2184 } 2185 if (hso_net->mux_bulk_tx_urb) 2186 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2187 2188 return 0; 2189} 2190 2191static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2192{ 2193 int i, result = 0; 2194 struct hso_serial *serial = dev2ser(hso_dev); 2195 2196 if (!serial) 2197 return -ENODEV; 2198 2199 /* If it is not the MUX port fill in and submit a bulk urb (already 2200 * allocated in hso_serial_start) */ 2201 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2202 for (i = 0; i < serial->num_rx_urbs; i++) { 2203 usb_fill_bulk_urb(serial->rx_urb[i], 2204 serial->parent->usb, 2205 usb_rcvbulkpipe(serial->parent->usb, 2206 serial->in_endp-> 2207 bEndpointAddress & 2208 0x7F), 2209 serial->rx_data[i], 2210 serial->rx_data_length, 2211 hso_std_serial_read_bulk_callback, 2212 serial); 2213 result = usb_submit_urb(serial->rx_urb[i], flags); 2214 if (result) { 2215 dev_warn(&serial->parent->usb->dev, 2216 "Failed to submit urb - res %d\n", 2217 result); 2218 break; 2219 } 2220 } 2221 } else { 2222 mutex_lock(&serial->shared_int->shared_int_lock); 2223 if (!serial->shared_int->use_count) { 2224 result = 2225 hso_mux_submit_intr_urb(serial->shared_int, 2226 hso_dev->usb, flags); 2227 } 2228 serial->shared_int->use_count++; 2229 mutex_unlock(&serial->shared_int->shared_int_lock); 2230 } 2231 if (serial->tiocmget) 2232 tiocmget_submit_urb(serial, 2233 serial->tiocmget, 2234 serial->parent->usb); 2235 return result; 2236} 2237 2238static int hso_stop_serial_device(struct hso_device *hso_dev) 2239{ 2240 int i; 2241 struct hso_serial *serial = dev2ser(hso_dev); 2242 struct hso_tiocmget *tiocmget; 2243 2244 if (!serial) 2245 return -ENODEV; 2246 2247 for (i = 0; i < serial->num_rx_urbs; i++) { 2248 if (serial->rx_urb[i]) { 2249 usb_kill_urb(serial->rx_urb[i]); 2250 serial->rx_urb_filled[i] = 0; 2251 } 2252 } 2253 serial->curr_rx_urb_idx = 0; 2254 serial->curr_rx_urb_offset = 0; 2255 2256 if (serial->tx_urb) 2257 usb_kill_urb(serial->tx_urb); 2258 2259 if (serial->shared_int) { 2260 mutex_lock(&serial->shared_int->shared_int_lock); 2261 if (serial->shared_int->use_count && 2262 (--serial->shared_int->use_count == 0)) { 2263 struct urb *urb; 2264 2265 urb = serial->shared_int->shared_intr_urb; 2266 if (urb) 2267 usb_kill_urb(urb); 2268 } 2269 mutex_unlock(&serial->shared_int->shared_int_lock); 2270 } 2271 tiocmget = serial->tiocmget; 2272 if (tiocmget) { 2273 wake_up_interruptible(&tiocmget->waitq); 2274 usb_kill_urb(tiocmget->urb); 2275 } 2276 2277 return 0; 2278} 2279 2280static void hso_serial_common_free(struct hso_serial *serial) 2281{ 2282 int i; 2283 2284 if (serial->parent->dev) 2285 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 2286 2287 tty_unregister_device(tty_drv, serial->minor); 2288 2289 for (i = 0; i < serial->num_rx_urbs; i++) { 2290 /* unlink and free RX URB */ 2291 usb_free_urb(serial->rx_urb[i]); 2292 /* free the RX buffer */ 2293 kfree(serial->rx_data[i]); 2294 } 2295 2296 /* unlink and free TX URB */ 2297 usb_free_urb(serial->tx_urb); 2298 kfree(serial->tx_data); 2299} 2300 2301static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2302 int rx_size, int tx_size) 2303{ 2304 struct device *dev; 2305 int minor; 2306 int i; 2307 2308 minor = get_free_serial_index(); 2309 if (minor < 0) 2310 goto exit; 2311 2312 /* register our minor number */ 2313 serial->parent->dev = tty_register_device(tty_drv, minor, 2314 &serial->parent->interface->dev); 2315 dev = serial->parent->dev; 2316 dev_set_drvdata(dev, serial->parent); 2317 i = device_create_file(dev, &dev_attr_hsotype); 2318 2319 /* fill in specific data for later use */ 2320 serial->minor = minor; 2321 serial->magic = HSO_SERIAL_MAGIC; 2322 spin_lock_init(&serial->serial_lock); 2323 serial->num_rx_urbs = num_urbs; 2324 2325 /* RX, allocate urb and initialize */ 2326 2327 /* prepare our RX buffer */ 2328 serial->rx_data_length = rx_size; 2329 for (i = 0; i < serial->num_rx_urbs; i++) { 2330 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2331 if (!serial->rx_urb[i]) { 2332 dev_err(dev, "Could not allocate urb?\n"); 2333 goto exit; 2334 } 2335 serial->rx_urb[i]->transfer_buffer = NULL; 2336 serial->rx_urb[i]->transfer_buffer_length = 0; 2337 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2338 GFP_KERNEL); 2339 if (!serial->rx_data[i]) { 2340 dev_err(dev, "%s - Out of memory\n", __func__); 2341 goto exit; 2342 } 2343 } 2344 2345 /* TX, allocate urb and initialize */ 2346 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2347 if (!serial->tx_urb) { 2348 dev_err(dev, "Could not allocate urb?\n"); 2349 goto exit; 2350 } 2351 serial->tx_urb->transfer_buffer = NULL; 2352 serial->tx_urb->transfer_buffer_length = 0; 2353 /* prepare our TX buffer */ 2354 serial->tx_data_count = 0; 2355 serial->tx_buffer_count = 0; 2356 serial->tx_data_length = tx_size; 2357 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2358 if (!serial->tx_data) { 2359 dev_err(dev, "%s - Out of memory\n", __func__); 2360 goto exit; 2361 } 2362 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2363 if (!serial->tx_buffer) { 2364 dev_err(dev, "%s - Out of memory\n", __func__); 2365 goto exit; 2366 } 2367 2368 return 0; 2369exit: 2370 hso_serial_common_free(serial); 2371 return -1; 2372} 2373 2374/* Creates a general hso device */ 2375static struct hso_device *hso_create_device(struct usb_interface *intf, 2376 int port_spec) 2377{ 2378 struct hso_device *hso_dev; 2379 2380 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2381 if (!hso_dev) 2382 return NULL; 2383 2384 hso_dev->port_spec = port_spec; 2385 hso_dev->usb = interface_to_usbdev(intf); 2386 hso_dev->interface = intf; 2387 kref_init(&hso_dev->ref); 2388 mutex_init(&hso_dev->mutex); 2389 2390 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2391 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2392 INIT_WORK(&hso_dev->reset_device, reset_device); 2393 2394 return hso_dev; 2395} 2396 2397/* Removes a network device in the network device table */ 2398static int remove_net_device(struct hso_device *hso_dev) 2399{ 2400 int i; 2401 2402 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2403 if (network_table[i] == hso_dev) { 2404 network_table[i] = NULL; 2405 break; 2406 } 2407 } 2408 if (i == HSO_MAX_NET_DEVICES) 2409 return -1; 2410 return 0; 2411} 2412 2413/* Frees our network device */ 2414static void hso_free_net_device(struct hso_device *hso_dev) 2415{ 2416 int i; 2417 struct hso_net *hso_net = dev2net(hso_dev); 2418 2419 if (!hso_net) 2420 return; 2421 2422 remove_net_device(hso_net->parent); 2423 2424 if (hso_net->net) 2425 unregister_netdev(hso_net->net); 2426 2427 /* start freeing */ 2428 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2429 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2430 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2431 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2432 } 2433 usb_free_urb(hso_net->mux_bulk_tx_urb); 2434 kfree(hso_net->mux_bulk_tx_buf); 2435 hso_net->mux_bulk_tx_buf = NULL; 2436 2437 if (hso_net->net) 2438 free_netdev(hso_net->net); 2439 2440 kfree(hso_dev); 2441} 2442 2443static const struct net_device_ops hso_netdev_ops = { 2444 .ndo_open = hso_net_open, 2445 .ndo_stop = hso_net_close, 2446 .ndo_start_xmit = hso_net_start_xmit, 2447 .ndo_tx_timeout = hso_net_tx_timeout, 2448}; 2449 2450/* initialize the network interface */ 2451static void hso_net_init(struct net_device *net) 2452{ 2453 struct hso_net *hso_net = netdev_priv(net); 2454 2455 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2456 2457 /* fill in the other fields */ 2458 net->netdev_ops = &hso_netdev_ops; 2459 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2460 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2461 net->type = ARPHRD_NONE; 2462 net->mtu = DEFAULT_MTU - 14; 2463 net->tx_queue_len = 10; 2464 SET_ETHTOOL_OPS(net, &ops); 2465 2466 /* and initialize the semaphore */ 2467 spin_lock_init(&hso_net->net_lock); 2468} 2469 2470/* Adds a network device in the network device table */ 2471static int add_net_device(struct hso_device *hso_dev) 2472{ 2473 int i; 2474 2475 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2476 if (network_table[i] == NULL) { 2477 network_table[i] = hso_dev; 2478 break; 2479 } 2480 } 2481 if (i == HSO_MAX_NET_DEVICES) 2482 return -1; 2483 return 0; 2484} 2485 2486static int hso_rfkill_set_block(void *data, bool blocked) 2487{ 2488 struct hso_device *hso_dev = data; 2489 int enabled = !blocked; 2490 int rv; 2491 2492 mutex_lock(&hso_dev->mutex); 2493 if (hso_dev->usb_gone) 2494 rv = 0; 2495 else 2496 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2497 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2498 USB_CTRL_SET_TIMEOUT); 2499 mutex_unlock(&hso_dev->mutex); 2500 return rv; 2501} 2502 2503static const struct rfkill_ops hso_rfkill_ops = { 2504 .set_block = hso_rfkill_set_block, 2505}; 2506 2507/* Creates and sets up everything for rfkill */ 2508static void hso_create_rfkill(struct hso_device *hso_dev, 2509 struct usb_interface *interface) 2510{ 2511 struct hso_net *hso_net = dev2net(hso_dev); 2512 struct device *dev = &hso_net->net->dev; 2513 char *rfkn; 2514 2515 rfkn = kzalloc(20, GFP_KERNEL); 2516 if (!rfkn) 2517 dev_err(dev, "%s - Out of memory\n", __func__); 2518 2519 snprintf(rfkn, 20, "hso-%d", 2520 interface->altsetting->desc.bInterfaceNumber); 2521 2522 hso_net->rfkill = rfkill_alloc(rfkn, 2523 &interface_to_usbdev(interface)->dev, 2524 RFKILL_TYPE_WWAN, 2525 &hso_rfkill_ops, hso_dev); 2526 if (!hso_net->rfkill) { 2527 dev_err(dev, "%s - Out of memory\n", __func__); 2528 kfree(rfkn); 2529 return; 2530 } 2531 if (rfkill_register(hso_net->rfkill) < 0) { 2532 rfkill_destroy(hso_net->rfkill); 2533 kfree(rfkn); 2534 hso_net->rfkill = NULL; 2535 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2536 return; 2537 } 2538} 2539 2540static struct device_type hso_type = { 2541 .name = "wwan", 2542}; 2543 2544/* Creates our network device */ 2545static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2546 int port_spec) 2547{ 2548 int result, i; 2549 struct net_device *net; 2550 struct hso_net *hso_net; 2551 struct hso_device *hso_dev; 2552 2553 hso_dev = hso_create_device(interface, port_spec); 2554 if (!hso_dev) 2555 return NULL; 2556 2557 /* allocate our network device, then we can put in our private data */ 2558 /* call hso_net_init to do the basic initialization */ 2559 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2560 if (!net) { 2561 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2562 goto exit; 2563 } 2564 2565 hso_net = netdev_priv(net); 2566 2567 hso_dev->port_data.dev_net = hso_net; 2568 hso_net->net = net; 2569 hso_net->parent = hso_dev; 2570 2571 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2572 USB_DIR_IN); 2573 if (!hso_net->in_endp) { 2574 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2575 goto exit; 2576 } 2577 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2578 USB_DIR_OUT); 2579 if (!hso_net->out_endp) { 2580 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2581 goto exit; 2582 } 2583 SET_NETDEV_DEV(net, &interface->dev); 2584 SET_NETDEV_DEVTYPE(net, &hso_type); 2585 2586 /* registering our net device */ 2587 result = register_netdev(net); 2588 if (result) { 2589 dev_err(&interface->dev, "Failed to register device\n"); 2590 goto exit; 2591 } 2592 2593 /* start allocating */ 2594 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2595 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2596 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2597 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2598 goto exit; 2599 } 2600 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2601 GFP_KERNEL); 2602 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2603 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2604 goto exit; 2605 } 2606 } 2607 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2608 if (!hso_net->mux_bulk_tx_urb) { 2609 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2610 goto exit; 2611 } 2612 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2613 if (!hso_net->mux_bulk_tx_buf) { 2614 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2615 goto exit; 2616 } 2617 2618 add_net_device(hso_dev); 2619 2620 hso_log_port(hso_dev); 2621 2622 hso_create_rfkill(hso_dev, interface); 2623 2624 return hso_dev; 2625exit: 2626 hso_free_net_device(hso_dev); 2627 return NULL; 2628} 2629 2630static void hso_free_tiomget(struct hso_serial *serial) 2631{ 2632 struct hso_tiocmget *tiocmget; 2633 if (!serial) 2634 return; 2635 tiocmget = serial->tiocmget; 2636 if (tiocmget) { 2637 usb_free_urb(tiocmget->urb); 2638 tiocmget->urb = NULL; 2639 serial->tiocmget = NULL; 2640 kfree(tiocmget); 2641 } 2642} 2643 2644/* Frees an AT channel ( goes for both mux and non-mux ) */ 2645static void hso_free_serial_device(struct hso_device *hso_dev) 2646{ 2647 struct hso_serial *serial = dev2ser(hso_dev); 2648 2649 if (!serial) 2650 return; 2651 set_serial_by_index(serial->minor, NULL); 2652 2653 hso_serial_common_free(serial); 2654 2655 if (serial->shared_int) { 2656 mutex_lock(&serial->shared_int->shared_int_lock); 2657 if (--serial->shared_int->ref_count == 0) 2658 hso_free_shared_int(serial->shared_int); 2659 else 2660 mutex_unlock(&serial->shared_int->shared_int_lock); 2661 } 2662 hso_free_tiomget(serial); 2663 kfree(serial); 2664 kfree(hso_dev); 2665} 2666 2667/* Creates a bulk AT channel */ 2668static struct hso_device *hso_create_bulk_serial_device( 2669 struct usb_interface *interface, int port) 2670{ 2671 struct hso_device *hso_dev; 2672 struct hso_serial *serial; 2673 int num_urbs; 2674 struct hso_tiocmget *tiocmget; 2675 2676 hso_dev = hso_create_device(interface, port); 2677 if (!hso_dev) 2678 return NULL; 2679 2680 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2681 if (!serial) 2682 goto exit; 2683 2684 serial->parent = hso_dev; 2685 hso_dev->port_data.dev_serial = serial; 2686 2687 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2688 num_urbs = 2; 2689 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2690 GFP_KERNEL); 2691 /* it isn't going to break our heart if serial->tiocmget 2692 * allocation fails don't bother checking this. 2693 */ 2694 if (serial->tiocmget) { 2695 tiocmget = serial->tiocmget; 2696 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2697 if (tiocmget->urb) { 2698 mutex_init(&tiocmget->mutex); 2699 init_waitqueue_head(&tiocmget->waitq); 2700 tiocmget->endp = hso_get_ep( 2701 interface, 2702 USB_ENDPOINT_XFER_INT, 2703 USB_DIR_IN); 2704 } else 2705 hso_free_tiomget(serial); 2706 } 2707 } 2708 else 2709 num_urbs = 1; 2710 2711 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2712 BULK_URB_TX_SIZE)) 2713 goto exit; 2714 2715 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2716 USB_DIR_IN); 2717 if (!serial->in_endp) { 2718 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2719 goto exit2; 2720 } 2721 2722 if (! 2723 (serial->out_endp = 2724 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2725 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2726 goto exit2; 2727 } 2728 2729 serial->write_data = hso_std_serial_write_data; 2730 2731 /* and record this serial */ 2732 set_serial_by_index(serial->minor, serial); 2733 2734 /* setup the proc dirs and files if needed */ 2735 hso_log_port(hso_dev); 2736 2737 /* done, return it */ 2738 return hso_dev; 2739 2740exit2: 2741 hso_serial_common_free(serial); 2742exit: 2743 hso_free_tiomget(serial); 2744 kfree(serial); 2745 kfree(hso_dev); 2746 return NULL; 2747} 2748 2749/* Creates a multiplexed AT channel */ 2750static 2751struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2752 int port, 2753 struct hso_shared_int *mux) 2754{ 2755 struct hso_device *hso_dev; 2756 struct hso_serial *serial; 2757 int port_spec; 2758 2759 port_spec = HSO_INTF_MUX; 2760 port_spec &= ~HSO_PORT_MASK; 2761 2762 port_spec |= hso_mux_to_port(port); 2763 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2764 return NULL; 2765 2766 hso_dev = hso_create_device(interface, port_spec); 2767 if (!hso_dev) 2768 return NULL; 2769 2770 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2771 if (!serial) 2772 goto exit; 2773 2774 hso_dev->port_data.dev_serial = serial; 2775 serial->parent = hso_dev; 2776 2777 if (hso_serial_common_create 2778 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2779 goto exit; 2780 2781 serial->tx_data_length--; 2782 serial->write_data = hso_mux_serial_write_data; 2783 2784 serial->shared_int = mux; 2785 mutex_lock(&serial->shared_int->shared_int_lock); 2786 serial->shared_int->ref_count++; 2787 mutex_unlock(&serial->shared_int->shared_int_lock); 2788 2789 /* and record this serial */ 2790 set_serial_by_index(serial->minor, serial); 2791 2792 /* setup the proc dirs and files if needed */ 2793 hso_log_port(hso_dev); 2794 2795 /* done, return it */ 2796 return hso_dev; 2797 2798exit: 2799 if (serial) { 2800 tty_unregister_device(tty_drv, serial->minor); 2801 kfree(serial); 2802 } 2803 if (hso_dev) 2804 kfree(hso_dev); 2805 return NULL; 2806 2807} 2808 2809static void hso_free_shared_int(struct hso_shared_int *mux) 2810{ 2811 usb_free_urb(mux->shared_intr_urb); 2812 kfree(mux->shared_intr_buf); 2813 mutex_unlock(&mux->shared_int_lock); 2814 kfree(mux); 2815} 2816 2817static 2818struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2819{ 2820 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2821 2822 if (!mux) 2823 return NULL; 2824 2825 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2826 USB_DIR_IN); 2827 if (!mux->intr_endp) { 2828 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2829 goto exit; 2830 } 2831 2832 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2833 if (!mux->shared_intr_urb) { 2834 dev_err(&interface->dev, "Could not allocate intr urb?\n"); 2835 goto exit; 2836 } 2837 mux->shared_intr_buf = 2838 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2839 GFP_KERNEL); 2840 if (!mux->shared_intr_buf) { 2841 dev_err(&interface->dev, "Could not allocate intr buf?\n"); 2842 goto exit; 2843 } 2844 2845 mutex_init(&mux->shared_int_lock); 2846 2847 return mux; 2848 2849exit: 2850 kfree(mux->shared_intr_buf); 2851 usb_free_urb(mux->shared_intr_urb); 2852 kfree(mux); 2853 return NULL; 2854} 2855 2856/* Gets the port spec for a certain interface */ 2857static int hso_get_config_data(struct usb_interface *interface) 2858{ 2859 struct usb_device *usbdev = interface_to_usbdev(interface); 2860 u8 config_data[17]; 2861 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2862 s32 result; 2863 2864 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2865 0x86, 0xC0, 0, 0, config_data, 17, 2866 USB_CTRL_SET_TIMEOUT) != 0x11) { 2867 return -EIO; 2868 } 2869 2870 switch (config_data[if_num]) { 2871 case 0x0: 2872 result = 0; 2873 break; 2874 case 0x1: 2875 result = HSO_PORT_DIAG; 2876 break; 2877 case 0x2: 2878 result = HSO_PORT_GPS; 2879 break; 2880 case 0x3: 2881 result = HSO_PORT_GPS_CONTROL; 2882 break; 2883 case 0x4: 2884 result = HSO_PORT_APP; 2885 break; 2886 case 0x5: 2887 result = HSO_PORT_APP2; 2888 break; 2889 case 0x6: 2890 result = HSO_PORT_CONTROL; 2891 break; 2892 case 0x7: 2893 result = HSO_PORT_NETWORK; 2894 break; 2895 case 0x8: 2896 result = HSO_PORT_MODEM; 2897 break; 2898 case 0x9: 2899 result = HSO_PORT_MSD; 2900 break; 2901 case 0xa: 2902 result = HSO_PORT_PCSC; 2903 break; 2904 case 0xb: 2905 result = HSO_PORT_VOICE; 2906 break; 2907 default: 2908 result = 0; 2909 } 2910 2911 if (result) 2912 result |= HSO_INTF_BULK; 2913 2914 if (config_data[16] & 0x1) 2915 result |= HSO_INFO_CRC_BUG; 2916 2917 return result; 2918} 2919 2920/* called once for each interface upon device insertion */ 2921static int hso_probe(struct usb_interface *interface, 2922 const struct usb_device_id *id) 2923{ 2924 int mux, i, if_num, port_spec; 2925 unsigned char port_mask; 2926 struct hso_device *hso_dev = NULL; 2927 struct hso_shared_int *shared_int; 2928 struct hso_device *tmp_dev = NULL; 2929 2930 if_num = interface->altsetting->desc.bInterfaceNumber; 2931 2932 /* Get the interface/port specification from either driver_info or from 2933 * the device itself */ 2934 if (id->driver_info) 2935 port_spec = ((u32 *)(id->driver_info))[if_num]; 2936 else 2937 port_spec = hso_get_config_data(interface); 2938 2939 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2940 dev_err(&interface->dev, "Not our interface\n"); 2941 return -ENODEV; 2942 } 2943 /* Check if we need to switch to alt interfaces prior to port 2944 * configuration */ 2945 if (interface->num_altsetting > 1) 2946 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2947 interface->needs_remote_wakeup = 1; 2948 2949 /* Allocate new hso device(s) */ 2950 switch (port_spec & HSO_INTF_MASK) { 2951 case HSO_INTF_MUX: 2952 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2953 /* Create the network device */ 2954 if (!disable_net) { 2955 hso_dev = hso_create_net_device(interface, 2956 port_spec); 2957 if (!hso_dev) 2958 goto exit; 2959 tmp_dev = hso_dev; 2960 } 2961 } 2962 2963 if (hso_get_mux_ports(interface, &port_mask)) 2964 /* TODO: de-allocate everything */ 2965 goto exit; 2966 2967 shared_int = hso_create_shared_int(interface); 2968 if (!shared_int) 2969 goto exit; 2970 2971 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2972 if (port_mask & i) { 2973 hso_dev = hso_create_mux_serial_device( 2974 interface, i, shared_int); 2975 if (!hso_dev) 2976 goto exit; 2977 } 2978 } 2979 2980 if (tmp_dev) 2981 hso_dev = tmp_dev; 2982 break; 2983 2984 case HSO_INTF_BULK: 2985 /* It's a regular bulk interface */ 2986 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2987 if (!disable_net) 2988 hso_dev = 2989 hso_create_net_device(interface, port_spec); 2990 } else { 2991 hso_dev = 2992 hso_create_bulk_serial_device(interface, port_spec); 2993 } 2994 if (!hso_dev) 2995 goto exit; 2996 break; 2997 default: 2998 goto exit; 2999 } 3000 3001 /* save our data pointer in this device */ 3002 usb_set_intfdata(interface, hso_dev); 3003 3004 /* done */ 3005 return 0; 3006exit: 3007 hso_free_interface(interface); 3008 return -ENODEV; 3009} 3010 3011/* device removed, cleaning up */ 3012static void hso_disconnect(struct usb_interface *interface) 3013{ 3014 hso_free_interface(interface); 3015 3016 /* remove reference of our private data */ 3017 usb_set_intfdata(interface, NULL); 3018} 3019 3020static void async_get_intf(struct work_struct *data) 3021{ 3022 struct hso_device *hso_dev = 3023 container_of(data, struct hso_device, async_get_intf); 3024 usb_autopm_get_interface(hso_dev->interface); 3025} 3026 3027static void async_put_intf(struct work_struct *data) 3028{ 3029 struct hso_device *hso_dev = 3030 container_of(data, struct hso_device, async_put_intf); 3031 usb_autopm_put_interface(hso_dev->interface); 3032} 3033 3034static int hso_get_activity(struct hso_device *hso_dev) 3035{ 3036 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 3037 if (!hso_dev->is_active) { 3038 hso_dev->is_active = 1; 3039 schedule_work(&hso_dev->async_get_intf); 3040 } 3041 } 3042 3043 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 3044 return -EAGAIN; 3045 3046 usb_mark_last_busy(hso_dev->usb); 3047 3048 return 0; 3049} 3050 3051static int hso_put_activity(struct hso_device *hso_dev) 3052{ 3053 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 3054 if (hso_dev->is_active) { 3055 hso_dev->is_active = 0; 3056 schedule_work(&hso_dev->async_put_intf); 3057 return -EAGAIN; 3058 } 3059 } 3060 hso_dev->is_active = 0; 3061 return 0; 3062} 3063 3064/* called by kernel when we need to suspend device */ 3065static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3066{ 3067 int i, result; 3068 3069 /* Stop all serial ports */ 3070 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3071 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3072 result = hso_stop_serial_device(serial_table[i]); 3073 if (result) 3074 goto out; 3075 } 3076 } 3077 3078 /* Stop all network ports */ 3079 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3080 if (network_table[i] && 3081 (network_table[i]->interface == iface)) { 3082 result = hso_stop_net_device(network_table[i]); 3083 if (result) 3084 goto out; 3085 } 3086 } 3087 3088out: 3089 return 0; 3090} 3091 3092/* called by kernel when we need to resume device */ 3093static int hso_resume(struct usb_interface *iface) 3094{ 3095 int i, result = 0; 3096 struct hso_net *hso_net; 3097 3098 /* Start all serial ports */ 3099 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3100 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3101 if (dev2ser(serial_table[i])->open_count) { 3102 result = 3103 hso_start_serial_device(serial_table[i], GFP_NOIO); 3104 hso_kick_transmit(dev2ser(serial_table[i])); 3105 if (result) 3106 goto out; 3107 } 3108 } 3109 } 3110 3111 /* Start all network ports */ 3112 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3113 if (network_table[i] && 3114 (network_table[i]->interface == iface)) { 3115 hso_net = dev2net(network_table[i]); 3116 if (hso_net->flags & IFF_UP) { 3117 /* First transmit any lingering data, 3118 then restart the device. */ 3119 if (hso_net->skb_tx_buf) { 3120 dev_dbg(&iface->dev, 3121 "Transmitting" 3122 " lingering data\n"); 3123 hso_net_start_xmit(hso_net->skb_tx_buf, 3124 hso_net->net); 3125 hso_net->skb_tx_buf = NULL; 3126 } 3127 result = hso_start_net_device(network_table[i]); 3128 if (result) 3129 goto out; 3130 } 3131 } 3132 } 3133 3134out: 3135 return result; 3136} 3137 3138static void reset_device(struct work_struct *data) 3139{ 3140 struct hso_device *hso_dev = 3141 container_of(data, struct hso_device, reset_device); 3142 struct usb_device *usb = hso_dev->usb; 3143 int result; 3144 3145 if (hso_dev->usb_gone) { 3146 D1("No reset during disconnect\n"); 3147 } else { 3148 result = usb_lock_device_for_reset(usb, hso_dev->interface); 3149 if (result < 0) 3150 D1("unable to lock device for reset: %d\n", result); 3151 else { 3152 usb_reset_device(usb); 3153 usb_unlock_device(usb); 3154 } 3155 } 3156} 3157 3158static void hso_serial_ref_free(struct kref *ref) 3159{ 3160 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3161 3162 hso_free_serial_device(hso_dev); 3163} 3164 3165static void hso_free_interface(struct usb_interface *interface) 3166{ 3167 struct hso_serial *hso_dev; 3168 struct tty_struct *tty; 3169 int i; 3170 3171 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3172 if (serial_table[i] && 3173 (serial_table[i]->interface == interface)) { 3174 hso_dev = dev2ser(serial_table[i]); 3175 spin_lock_irq(&hso_dev->serial_lock); 3176 tty = tty_kref_get(hso_dev->tty); 3177 spin_unlock_irq(&hso_dev->serial_lock); 3178 if (tty) 3179 tty_hangup(tty); 3180 mutex_lock(&hso_dev->parent->mutex); 3181 tty_kref_put(tty); 3182 hso_dev->parent->usb_gone = 1; 3183 mutex_unlock(&hso_dev->parent->mutex); 3184 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3185 } 3186 } 3187 3188 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3189 if (network_table[i] && 3190 (network_table[i]->interface == interface)) { 3191 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3192 /* hso_stop_net_device doesn't stop the net queue since 3193 * traffic needs to start it again when suspended */ 3194 netif_stop_queue(dev2net(network_table[i])->net); 3195 hso_stop_net_device(network_table[i]); 3196 cancel_work_sync(&network_table[i]->async_put_intf); 3197 cancel_work_sync(&network_table[i]->async_get_intf); 3198 if (rfk) { 3199 rfkill_unregister(rfk); 3200 rfkill_destroy(rfk); 3201 } 3202 hso_free_net_device(network_table[i]); 3203 } 3204 } 3205} 3206 3207/* Helper functions */ 3208 3209/* Get the endpoint ! */ 3210static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3211 int type, int dir) 3212{ 3213 int i; 3214 struct usb_host_interface *iface = intf->cur_altsetting; 3215 struct usb_endpoint_descriptor *endp; 3216 3217 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3218 endp = &iface->endpoint[i].desc; 3219 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3220 (usb_endpoint_type(endp) == type)) 3221 return endp; 3222 } 3223 3224 return NULL; 3225} 3226 3227/* Get the byte that describes which ports are enabled */ 3228static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3229{ 3230 int i; 3231 struct usb_host_interface *iface = intf->cur_altsetting; 3232 3233 if (iface->extralen == 3) { 3234 *ports = iface->extra[2]; 3235 return 0; 3236 } 3237 3238 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3239 if (iface->endpoint[i].extralen == 3) { 3240 *ports = iface->endpoint[i].extra[2]; 3241 return 0; 3242 } 3243 } 3244 3245 return -1; 3246} 3247 3248/* interrupt urb needs to be submitted, used for serial read of muxed port */ 3249static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3250 struct usb_device *usb, gfp_t gfp) 3251{ 3252 int result; 3253 3254 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3255 usb_rcvintpipe(usb, 3256 shared_int->intr_endp->bEndpointAddress & 0x7F), 3257 shared_int->shared_intr_buf, 3258 1, 3259 intr_callback, shared_int, 3260 shared_int->intr_endp->bInterval); 3261 3262 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3263 if (result) 3264 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3265 result); 3266 3267 return result; 3268} 3269 3270/* operations setup of the serial interface */ 3271static const struct tty_operations hso_serial_ops = { 3272 .open = hso_serial_open, 3273 .close = hso_serial_close, 3274 .write = hso_serial_write, 3275 .write_room = hso_serial_write_room, 3276 .ioctl = hso_serial_ioctl, 3277 .set_termios = hso_serial_set_termios, 3278 .chars_in_buffer = hso_serial_chars_in_buffer, 3279 .tiocmget = hso_serial_tiocmget, 3280 .tiocmset = hso_serial_tiocmset, 3281 .get_icount = hso_get_count, 3282 .unthrottle = hso_unthrottle 3283}; 3284 3285static struct usb_driver hso_driver = { 3286 .name = driver_name, 3287 .probe = hso_probe, 3288 .disconnect = hso_disconnect, 3289 .id_table = hso_ids, 3290 .suspend = hso_suspend, 3291 .resume = hso_resume, 3292 .reset_resume = hso_resume, 3293 .supports_autosuspend = 1, 3294}; 3295 3296static int __init hso_init(void) 3297{ 3298 int i; 3299 int result; 3300 3301 /* put it in the log */ 3302 printk(KERN_INFO "hso: %s\n", version); 3303 3304 /* Initialise the serial table semaphore and table */ 3305 spin_lock_init(&serial_table_lock); 3306 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3307 serial_table[i] = NULL; 3308 3309 /* allocate our driver using the proper amount of supported minors */ 3310 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3311 if (!tty_drv) 3312 return -ENOMEM; 3313 3314 /* fill in all needed values */ 3315 tty_drv->magic = TTY_DRIVER_MAGIC; 3316 tty_drv->driver_name = driver_name; 3317 tty_drv->name = tty_filename; 3318 3319 /* if major number is provided as parameter, use that one */ 3320 if (tty_major) 3321 tty_drv->major = tty_major; 3322 3323 tty_drv->minor_start = 0; 3324 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3325 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3326 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3327 tty_drv->init_termios = tty_std_termios; 3328 hso_init_termios(&tty_drv->init_termios); 3329 tty_set_operations(tty_drv, &hso_serial_ops); 3330 3331 /* register the tty driver */ 3332 result = tty_register_driver(tty_drv); 3333 if (result) { 3334 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 3335 __func__, result); 3336 return result; 3337 } 3338 3339 /* register this module as an usb driver */ 3340 result = usb_register(&hso_driver); 3341 if (result) { 3342 printk(KERN_ERR "Could not register hso driver? error: %d\n", 3343 result); 3344 /* cleanup serial interface */ 3345 tty_unregister_driver(tty_drv); 3346 return result; 3347 } 3348 3349 /* done */ 3350 return 0; 3351} 3352 3353static void __exit hso_exit(void) 3354{ 3355 printk(KERN_INFO "hso: unloaded\n"); 3356 3357 tty_unregister_driver(tty_drv); 3358 /* deregister the usb driver */ 3359 usb_deregister(&hso_driver); 3360} 3361 3362/* Module definitions */ 3363module_init(hso_init); 3364module_exit(hso_exit); 3365 3366MODULE_AUTHOR(MOD_AUTHOR); 3367MODULE_DESCRIPTION(MOD_DESCRIPTION); 3368MODULE_LICENSE(MOD_LICENSE); 3369 3370/* change the debug level (eg: insmod hso.ko debug=0x04) */ 3371MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3372module_param(debug, int, S_IRUGO | S_IWUSR); 3373 3374/* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3375MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3376module_param(tty_major, int, S_IRUGO | S_IWUSR); 3377 3378/* disable network interface (eg: insmod hso.ko disable_net=1) */ 3379MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3380module_param(disable_net, int, S_IRUGO | S_IWUSR); 3381