hso.c revision ab153d84d9609b4e6f53632a6f14b882e866cb47
1/****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 7 * <ajb@spheresystems.co.uk> 8 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 9 * Copyright (C) 2008 Novell, Inc. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 23 * USA 24 * 25 * 26 *****************************************************************************/ 27 28/****************************************************************************** 29 * 30 * Description of the device: 31 * 32 * Interface 0: Contains the IP network interface on the bulk end points. 33 * The multiplexed serial ports are using the interrupt and 34 * control endpoints. 35 * Interrupt contains a bitmap telling which multiplexed 36 * serialport needs servicing. 37 * 38 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 39 * port is opened, as this have a huge impact on the network port 40 * throughput. 41 * 42 * Interface 2: Standard modem interface - circuit switched interface, should 43 * not be used. 44 * 45 *****************************************************************************/ 46 47#include <linux/sched.h> 48#include <linux/slab.h> 49#include <linux/init.h> 50#include <linux/delay.h> 51#include <linux/netdevice.h> 52#include <linux/module.h> 53#include <linux/ethtool.h> 54#include <linux/usb.h> 55#include <linux/timer.h> 56#include <linux/tty.h> 57#include <linux/tty_driver.h> 58#include <linux/tty_flip.h> 59#include <linux/kmod.h> 60#include <linux/rfkill.h> 61#include <linux/ip.h> 62#include <linux/uaccess.h> 63#include <linux/usb/cdc.h> 64#include <net/arp.h> 65#include <asm/byteorder.h> 66 67 68#define DRIVER_VERSION "1.2" 69#define MOD_AUTHOR "Option Wireless" 70#define MOD_DESCRIPTION "USB High Speed Option driver" 71#define MOD_LICENSE "GPL" 72 73#define HSO_MAX_NET_DEVICES 10 74#define HSO__MAX_MTU 2048 75#define DEFAULT_MTU 1500 76#define DEFAULT_MRU 1500 77 78#define CTRL_URB_RX_SIZE 1024 79#define CTRL_URB_TX_SIZE 64 80 81#define BULK_URB_RX_SIZE 4096 82#define BULK_URB_TX_SIZE 8192 83 84#define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 85#define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 86#define MUX_BULK_RX_BUF_COUNT 4 87#define USB_TYPE_OPTION_VENDOR 0x20 88 89/* These definitions are used with the struct hso_net flags element */ 90/* - use *_bit operations on it. (bit indices not values.) */ 91#define HSO_NET_RUNNING 0 92 93#define HSO_NET_TX_TIMEOUT (HZ*10) 94 95#define HSO_SERIAL_MAGIC 0x48534f31 96 97/* Number of ttys to handle */ 98#define HSO_SERIAL_TTY_MINORS 256 99 100#define MAX_RX_URBS 2 101 102static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty) 103{ 104 if (tty) 105 return tty->driver_data; 106 return NULL; 107} 108 109/*****************************************************************************/ 110/* Debugging functions */ 111/*****************************************************************************/ 112#define D__(lvl_, fmt, arg...) \ 113 do { \ 114 printk(lvl_ "[%d:%s]: " fmt "\n", \ 115 __LINE__, __func__, ## arg); \ 116 } while (0) 117 118#define D_(lvl, args...) \ 119 do { \ 120 if (lvl & debug) \ 121 D__(KERN_INFO, args); \ 122 } while (0) 123 124#define D1(args...) D_(0x01, ##args) 125#define D2(args...) D_(0x02, ##args) 126#define D3(args...) D_(0x04, ##args) 127#define D4(args...) D_(0x08, ##args) 128#define D5(args...) D_(0x10, ##args) 129 130/*****************************************************************************/ 131/* Enumerators */ 132/*****************************************************************************/ 133enum pkt_parse_state { 134 WAIT_IP, 135 WAIT_DATA, 136 WAIT_SYNC 137}; 138 139/*****************************************************************************/ 140/* Structs */ 141/*****************************************************************************/ 142 143struct hso_shared_int { 144 struct usb_endpoint_descriptor *intr_endp; 145 void *shared_intr_buf; 146 struct urb *shared_intr_urb; 147 struct usb_device *usb; 148 int use_count; 149 int ref_count; 150 struct mutex shared_int_lock; 151}; 152 153struct hso_net { 154 struct hso_device *parent; 155 struct net_device *net; 156 struct rfkill *rfkill; 157 158 struct usb_endpoint_descriptor *in_endp; 159 struct usb_endpoint_descriptor *out_endp; 160 161 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 162 struct urb *mux_bulk_tx_urb; 163 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 164 void *mux_bulk_tx_buf; 165 166 struct sk_buff *skb_rx_buf; 167 struct sk_buff *skb_tx_buf; 168 169 enum pkt_parse_state rx_parse_state; 170 spinlock_t net_lock; 171 172 unsigned short rx_buf_size; 173 unsigned short rx_buf_missing; 174 struct iphdr rx_ip_hdr; 175 176 unsigned long flags; 177}; 178 179enum rx_ctrl_state{ 180 RX_IDLE, 181 RX_SENT, 182 RX_PENDING 183}; 184 185struct hso_serial { 186 struct hso_device *parent; 187 int magic; 188 u8 minor; 189 190 struct hso_shared_int *shared_int; 191 192 /* rx/tx urb could be either a bulk urb or a control urb depending 193 on which serial port it is used on. */ 194 struct urb *rx_urb[MAX_RX_URBS]; 195 u8 num_rx_urbs; 196 u8 *rx_data[MAX_RX_URBS]; 197 u16 rx_data_length; /* should contain allocated length */ 198 199 struct urb *tx_urb; 200 u8 *tx_data; 201 u8 *tx_buffer; 202 u16 tx_data_length; /* should contain allocated length */ 203 u16 tx_data_count; 204 u16 tx_buffer_count; 205 struct usb_ctrlrequest ctrl_req_tx; 206 struct usb_ctrlrequest ctrl_req_rx; 207 208 struct usb_endpoint_descriptor *in_endp; 209 struct usb_endpoint_descriptor *out_endp; 210 211 enum rx_ctrl_state rx_state; 212 u8 rts_state; 213 u8 dtr_state; 214 unsigned tx_urb_used:1; 215 216 /* from usb_serial_port */ 217 struct tty_struct *tty; 218 int open_count; 219 spinlock_t serial_lock; 220 221 int (*write_data) (struct hso_serial *serial); 222 /* Hacks required to get flow control 223 * working on the serial receive buffers 224 * so as not to drop characters on the floor. 225 */ 226 int curr_rx_urb_idx; 227 u16 curr_rx_urb_offset; 228 u8 rx_urb_filled[MAX_RX_URBS]; 229 struct tasklet_struct unthrottle_tasklet; 230 struct work_struct retry_unthrottle_workqueue; 231}; 232 233struct hso_device { 234 union { 235 struct hso_serial *dev_serial; 236 struct hso_net *dev_net; 237 } port_data; 238 239 u32 port_spec; 240 241 u8 is_active; 242 u8 usb_gone; 243 struct work_struct async_get_intf; 244 struct work_struct async_put_intf; 245 246 struct usb_device *usb; 247 struct usb_interface *interface; 248 249 struct device *dev; 250 struct kref ref; 251 struct mutex mutex; 252}; 253 254/* Type of interface */ 255#define HSO_INTF_MASK 0xFF00 256#define HSO_INTF_MUX 0x0100 257#define HSO_INTF_BULK 0x0200 258 259/* Type of port */ 260#define HSO_PORT_MASK 0xFF 261#define HSO_PORT_NO_PORT 0x0 262#define HSO_PORT_CONTROL 0x1 263#define HSO_PORT_APP 0x2 264#define HSO_PORT_GPS 0x3 265#define HSO_PORT_PCSC 0x4 266#define HSO_PORT_APP2 0x5 267#define HSO_PORT_GPS_CONTROL 0x6 268#define HSO_PORT_MSD 0x7 269#define HSO_PORT_VOICE 0x8 270#define HSO_PORT_DIAG2 0x9 271#define HSO_PORT_DIAG 0x10 272#define HSO_PORT_MODEM 0x11 273#define HSO_PORT_NETWORK 0x12 274 275/* Additional device info */ 276#define HSO_INFO_MASK 0xFF000000 277#define HSO_INFO_CRC_BUG 0x01000000 278 279/*****************************************************************************/ 280/* Prototypes */ 281/*****************************************************************************/ 282/* Serial driver functions */ 283static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 284 unsigned int set, unsigned int clear); 285static void ctrl_callback(struct urb *urb); 286static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 287static void hso_kick_transmit(struct hso_serial *serial); 288/* Helper functions */ 289static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 290 struct usb_device *usb, gfp_t gfp); 291static void log_usb_status(int status, const char *function); 292static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 293 int type, int dir); 294static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 295static void hso_free_interface(struct usb_interface *intf); 296static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 297static int hso_stop_serial_device(struct hso_device *hso_dev); 298static int hso_start_net_device(struct hso_device *hso_dev); 299static void hso_free_shared_int(struct hso_shared_int *shared_int); 300static int hso_stop_net_device(struct hso_device *hso_dev); 301static void hso_serial_ref_free(struct kref *ref); 302static void hso_std_serial_read_bulk_callback(struct urb *urb); 303static int hso_mux_serial_read(struct hso_serial *serial); 304static void async_get_intf(struct work_struct *data); 305static void async_put_intf(struct work_struct *data); 306static int hso_put_activity(struct hso_device *hso_dev); 307static int hso_get_activity(struct hso_device *hso_dev); 308 309/*****************************************************************************/ 310/* Helping functions */ 311/*****************************************************************************/ 312 313/* #define DEBUG */ 314 315static inline struct hso_net *dev2net(struct hso_device *hso_dev) 316{ 317 return hso_dev->port_data.dev_net; 318} 319 320static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 321{ 322 return hso_dev->port_data.dev_serial; 323} 324 325/* Debugging functions */ 326#ifdef DEBUG 327static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 328 unsigned int len) 329{ 330 static char name[255]; 331 332 sprintf(name, "hso[%d:%s]", line_count, func_name); 333 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 334} 335 336#define DUMP(buf_, len_) \ 337 dbg_dump(__LINE__, __func__, buf_, len_) 338 339#define DUMP1(buf_, len_) \ 340 do { \ 341 if (0x01 & debug) \ 342 DUMP(buf_, len_); \ 343 } while (0) 344#else 345#define DUMP(buf_, len_) 346#define DUMP1(buf_, len_) 347#endif 348 349/* module parameters */ 350static int debug; 351static int tty_major; 352static int disable_net; 353 354/* driver info */ 355static const char driver_name[] = "hso"; 356static const char tty_filename[] = "ttyHS"; 357static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR; 358/* the usb driver itself (registered in hso_init) */ 359static struct usb_driver hso_driver; 360/* serial structures */ 361static struct tty_driver *tty_drv; 362static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 363static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 364static spinlock_t serial_table_lock; 365static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS]; 366static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS]; 367 368static const s32 default_port_spec[] = { 369 HSO_INTF_MUX | HSO_PORT_NETWORK, 370 HSO_INTF_BULK | HSO_PORT_DIAG, 371 HSO_INTF_BULK | HSO_PORT_MODEM, 372 0 373}; 374 375static const s32 icon321_port_spec[] = { 376 HSO_INTF_MUX | HSO_PORT_NETWORK, 377 HSO_INTF_BULK | HSO_PORT_DIAG2, 378 HSO_INTF_BULK | HSO_PORT_MODEM, 379 HSO_INTF_BULK | HSO_PORT_DIAG, 380 0 381}; 382 383#define default_port_device(vendor, product) \ 384 USB_DEVICE(vendor, product), \ 385 .driver_info = (kernel_ulong_t)default_port_spec 386 387#define icon321_port_device(vendor, product) \ 388 USB_DEVICE(vendor, product), \ 389 .driver_info = (kernel_ulong_t)icon321_port_spec 390 391/* list of devices we support */ 392static const struct usb_device_id hso_ids[] = { 393 {default_port_device(0x0af0, 0x6711)}, 394 {default_port_device(0x0af0, 0x6731)}, 395 {default_port_device(0x0af0, 0x6751)}, 396 {default_port_device(0x0af0, 0x6771)}, 397 {default_port_device(0x0af0, 0x6791)}, 398 {default_port_device(0x0af0, 0x6811)}, 399 {default_port_device(0x0af0, 0x6911)}, 400 {default_port_device(0x0af0, 0x6951)}, 401 {default_port_device(0x0af0, 0x6971)}, 402 {default_port_device(0x0af0, 0x7011)}, 403 {default_port_device(0x0af0, 0x7031)}, 404 {default_port_device(0x0af0, 0x7051)}, 405 {default_port_device(0x0af0, 0x7071)}, 406 {default_port_device(0x0af0, 0x7111)}, 407 {default_port_device(0x0af0, 0x7211)}, 408 {default_port_device(0x0af0, 0x7251)}, 409 {default_port_device(0x0af0, 0x7271)}, 410 {default_port_device(0x0af0, 0x7311)}, 411 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 412 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 413 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 414 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 415 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 416 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 417 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 418 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 419 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 420 {USB_DEVICE(0x0af0, 0x7701)}, 421 {USB_DEVICE(0x0af0, 0x7801)}, 422 {USB_DEVICE(0x0af0, 0x7901)}, 423 {USB_DEVICE(0x0af0, 0x7361)}, 424 {icon321_port_device(0x0af0, 0xd051)}, 425 {} 426}; 427MODULE_DEVICE_TABLE(usb, hso_ids); 428 429/* Sysfs attribute */ 430static ssize_t hso_sysfs_show_porttype(struct device *dev, 431 struct device_attribute *attr, 432 char *buf) 433{ 434 struct hso_device *hso_dev = dev->driver_data; 435 char *port_name; 436 437 if (!hso_dev) 438 return 0; 439 440 switch (hso_dev->port_spec & HSO_PORT_MASK) { 441 case HSO_PORT_CONTROL: 442 port_name = "Control"; 443 break; 444 case HSO_PORT_APP: 445 port_name = "Application"; 446 break; 447 case HSO_PORT_APP2: 448 port_name = "Application2"; 449 break; 450 case HSO_PORT_GPS: 451 port_name = "GPS"; 452 break; 453 case HSO_PORT_GPS_CONTROL: 454 port_name = "GPS Control"; 455 break; 456 case HSO_PORT_PCSC: 457 port_name = "PCSC"; 458 break; 459 case HSO_PORT_DIAG: 460 port_name = "Diagnostic"; 461 break; 462 case HSO_PORT_DIAG2: 463 port_name = "Diagnostic2"; 464 break; 465 case HSO_PORT_MODEM: 466 port_name = "Modem"; 467 break; 468 case HSO_PORT_NETWORK: 469 port_name = "Network"; 470 break; 471 default: 472 port_name = "Unknown"; 473 break; 474 } 475 476 return sprintf(buf, "%s\n", port_name); 477} 478static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 479 480static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 481{ 482 int idx; 483 484 for (idx = 0; idx < serial->num_rx_urbs; idx++) 485 if (serial->rx_urb[idx] == urb) 486 return idx; 487 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 488 return -1; 489} 490 491/* converts mux value to a port spec value */ 492static u32 hso_mux_to_port(int mux) 493{ 494 u32 result; 495 496 switch (mux) { 497 case 0x1: 498 result = HSO_PORT_CONTROL; 499 break; 500 case 0x2: 501 result = HSO_PORT_APP; 502 break; 503 case 0x4: 504 result = HSO_PORT_PCSC; 505 break; 506 case 0x8: 507 result = HSO_PORT_GPS; 508 break; 509 case 0x10: 510 result = HSO_PORT_APP2; 511 break; 512 default: 513 result = HSO_PORT_NO_PORT; 514 } 515 return result; 516} 517 518/* converts port spec value to a mux value */ 519static u32 hso_port_to_mux(int port) 520{ 521 u32 result; 522 523 switch (port & HSO_PORT_MASK) { 524 case HSO_PORT_CONTROL: 525 result = 0x0; 526 break; 527 case HSO_PORT_APP: 528 result = 0x1; 529 break; 530 case HSO_PORT_PCSC: 531 result = 0x2; 532 break; 533 case HSO_PORT_GPS: 534 result = 0x3; 535 break; 536 case HSO_PORT_APP2: 537 result = 0x4; 538 break; 539 default: 540 result = 0x0; 541 } 542 return result; 543} 544 545static struct hso_serial *get_serial_by_shared_int_and_type( 546 struct hso_shared_int *shared_int, 547 int mux) 548{ 549 int i, port; 550 551 port = hso_mux_to_port(mux); 552 553 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 554 if (serial_table[i] 555 && (dev2ser(serial_table[i])->shared_int == shared_int) 556 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 557 return dev2ser(serial_table[i]); 558 } 559 } 560 561 return NULL; 562} 563 564static struct hso_serial *get_serial_by_index(unsigned index) 565{ 566 struct hso_serial *serial = NULL; 567 unsigned long flags; 568 569 spin_lock_irqsave(&serial_table_lock, flags); 570 if (serial_table[index]) 571 serial = dev2ser(serial_table[index]); 572 spin_unlock_irqrestore(&serial_table_lock, flags); 573 574 return serial; 575} 576 577static int get_free_serial_index(void) 578{ 579 int index; 580 unsigned long flags; 581 582 spin_lock_irqsave(&serial_table_lock, flags); 583 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 584 if (serial_table[index] == NULL) { 585 spin_unlock_irqrestore(&serial_table_lock, flags); 586 return index; 587 } 588 } 589 spin_unlock_irqrestore(&serial_table_lock, flags); 590 591 printk(KERN_ERR "%s: no free serial devices in table\n", __func__); 592 return -1; 593} 594 595static void set_serial_by_index(unsigned index, struct hso_serial *serial) 596{ 597 unsigned long flags; 598 599 spin_lock_irqsave(&serial_table_lock, flags); 600 if (serial) 601 serial_table[index] = serial->parent; 602 else 603 serial_table[index] = NULL; 604 spin_unlock_irqrestore(&serial_table_lock, flags); 605} 606 607/* log a meaningful explanation of an USB status */ 608static void log_usb_status(int status, const char *function) 609{ 610 char *explanation; 611 612 switch (status) { 613 case -ENODEV: 614 explanation = "no device"; 615 break; 616 case -ENOENT: 617 explanation = "endpoint not enabled"; 618 break; 619 case -EPIPE: 620 explanation = "endpoint stalled"; 621 break; 622 case -ENOSPC: 623 explanation = "not enough bandwidth"; 624 break; 625 case -ESHUTDOWN: 626 explanation = "device disabled"; 627 break; 628 case -EHOSTUNREACH: 629 explanation = "device suspended"; 630 break; 631 case -EINVAL: 632 case -EAGAIN: 633 case -EFBIG: 634 case -EMSGSIZE: 635 explanation = "internal error"; 636 break; 637 default: 638 explanation = "unknown status"; 639 break; 640 } 641 D1("%s: received USB status - %s (%d)", function, explanation, status); 642} 643 644/* Network interface functions */ 645 646/* called when net interface is brought up by ifconfig */ 647static int hso_net_open(struct net_device *net) 648{ 649 struct hso_net *odev = netdev_priv(net); 650 unsigned long flags = 0; 651 652 if (!odev) { 653 dev_err(&net->dev, "No net device !\n"); 654 return -ENODEV; 655 } 656 657 odev->skb_tx_buf = NULL; 658 659 /* setup environment */ 660 spin_lock_irqsave(&odev->net_lock, flags); 661 odev->rx_parse_state = WAIT_IP; 662 odev->rx_buf_size = 0; 663 odev->rx_buf_missing = sizeof(struct iphdr); 664 spin_unlock_irqrestore(&odev->net_lock, flags); 665 666 hso_start_net_device(odev->parent); 667 668 /* We are up and running. */ 669 set_bit(HSO_NET_RUNNING, &odev->flags); 670 671 /* Tell the kernel we are ready to start receiving from it */ 672 netif_start_queue(net); 673 674 return 0; 675} 676 677/* called when interface is brought down by ifconfig */ 678static int hso_net_close(struct net_device *net) 679{ 680 struct hso_net *odev = netdev_priv(net); 681 682 /* we don't need the queue anymore */ 683 netif_stop_queue(net); 684 /* no longer running */ 685 clear_bit(HSO_NET_RUNNING, &odev->flags); 686 687 hso_stop_net_device(odev->parent); 688 689 /* done */ 690 return 0; 691} 692 693/* USB tells is xmit done, we should start the netqueue again */ 694static void write_bulk_callback(struct urb *urb) 695{ 696 struct hso_net *odev = urb->context; 697 int status = urb->status; 698 699 /* Sanity check */ 700 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 701 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 702 return; 703 } 704 705 /* Do we still have a valid kernel network device? */ 706 if (!netif_device_present(odev->net)) { 707 dev_err(&urb->dev->dev, "%s: net device not present\n", 708 __func__); 709 return; 710 } 711 712 /* log status, but don't act on it, we don't need to resubmit anything 713 * anyhow */ 714 if (status) 715 log_usb_status(status, __func__); 716 717 hso_put_activity(odev->parent); 718 719 /* Tell the network interface we are ready for another frame */ 720 netif_wake_queue(odev->net); 721} 722 723/* called by kernel when we need to transmit a packet */ 724static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net) 725{ 726 struct hso_net *odev = netdev_priv(net); 727 int result; 728 729 /* Tell the kernel, "No more frames 'til we are done with this one." */ 730 netif_stop_queue(net); 731 if (hso_get_activity(odev->parent) == -EAGAIN) { 732 odev->skb_tx_buf = skb; 733 return 0; 734 } 735 736 /* log if asked */ 737 DUMP1(skb->data, skb->len); 738 /* Copy it from kernel memory to OUR memory */ 739 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 740 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); 741 742 /* Fill in the URB for shipping it out. */ 743 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 744 odev->parent->usb, 745 usb_sndbulkpipe(odev->parent->usb, 746 odev->out_endp-> 747 bEndpointAddress & 0x7F), 748 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 749 odev); 750 751 /* Deal with the Zero Length packet problem, I hope */ 752 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 753 754 /* Send the URB on its merry way. */ 755 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 756 if (result) { 757 dev_warn(&odev->parent->interface->dev, 758 "failed mux_bulk_tx_urb %d", result); 759 net->stats.tx_errors++; 760 netif_start_queue(net); 761 } else { 762 net->stats.tx_packets++; 763 net->stats.tx_bytes += skb->len; 764 /* And tell the kernel when the last transmit started. */ 765 net->trans_start = jiffies; 766 } 767 dev_kfree_skb(skb); 768 /* we're done */ 769 return result; 770} 771 772static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 773{ 774 struct hso_net *odev = netdev_priv(net); 775 776 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); 777 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN); 778 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); 779} 780 781static struct ethtool_ops ops = { 782 .get_drvinfo = hso_get_drvinfo, 783 .get_link = ethtool_op_get_link 784}; 785 786/* called when a packet did not ack after watchdogtimeout */ 787static void hso_net_tx_timeout(struct net_device *net) 788{ 789 struct hso_net *odev = netdev_priv(net); 790 791 if (!odev) 792 return; 793 794 /* Tell syslog we are hosed. */ 795 dev_warn(&net->dev, "Tx timed out.\n"); 796 797 /* Tear the waiting frame off the list */ 798 if (odev->mux_bulk_tx_urb 799 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 800 usb_unlink_urb(odev->mux_bulk_tx_urb); 801 802 /* Update statistics */ 803 net->stats.tx_errors++; 804} 805 806/* make a real packet from the received USB buffer */ 807static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 808 unsigned int count, unsigned char is_eop) 809{ 810 unsigned short temp_bytes; 811 unsigned short buffer_offset = 0; 812 unsigned short frame_len; 813 unsigned char *tmp_rx_buf; 814 815 /* log if needed */ 816 D1("Rx %d bytes", count); 817 DUMP(ip_pkt, min(128, (int)count)); 818 819 while (count) { 820 switch (odev->rx_parse_state) { 821 case WAIT_IP: 822 /* waiting for IP header. */ 823 /* wanted bytes - size of ip header */ 824 temp_bytes = 825 (count < 826 odev->rx_buf_missing) ? count : odev-> 827 rx_buf_missing; 828 829 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 830 odev->rx_buf_size, ip_pkt + buffer_offset, 831 temp_bytes); 832 833 odev->rx_buf_size += temp_bytes; 834 buffer_offset += temp_bytes; 835 odev->rx_buf_missing -= temp_bytes; 836 count -= temp_bytes; 837 838 if (!odev->rx_buf_missing) { 839 /* header is complete allocate an sk_buffer and 840 * continue to WAIT_DATA */ 841 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 842 843 if ((frame_len > DEFAULT_MRU) || 844 (frame_len < sizeof(struct iphdr))) { 845 dev_err(&odev->net->dev, 846 "Invalid frame (%d) length\n", 847 frame_len); 848 odev->rx_parse_state = WAIT_SYNC; 849 continue; 850 } 851 /* Allocate an sk_buff */ 852 odev->skb_rx_buf = dev_alloc_skb(frame_len); 853 if (!odev->skb_rx_buf) { 854 /* We got no receive buffer. */ 855 D1("could not allocate memory"); 856 odev->rx_parse_state = WAIT_SYNC; 857 return; 858 } 859 /* Here's where it came from */ 860 odev->skb_rx_buf->dev = odev->net; 861 862 /* Copy what we got so far. make room for iphdr 863 * after tail. */ 864 tmp_rx_buf = 865 skb_put(odev->skb_rx_buf, 866 sizeof(struct iphdr)); 867 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), 868 sizeof(struct iphdr)); 869 870 /* ETH_HLEN */ 871 odev->rx_buf_size = sizeof(struct iphdr); 872 873 /* Filip actually use .tot_len */ 874 odev->rx_buf_missing = 875 frame_len - sizeof(struct iphdr); 876 odev->rx_parse_state = WAIT_DATA; 877 } 878 break; 879 880 case WAIT_DATA: 881 temp_bytes = (count < odev->rx_buf_missing) 882 ? count : odev->rx_buf_missing; 883 884 /* Copy the rest of the bytes that are left in the 885 * buffer into the waiting sk_buf. */ 886 /* Make room for temp_bytes after tail. */ 887 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); 888 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); 889 890 odev->rx_buf_missing -= temp_bytes; 891 count -= temp_bytes; 892 buffer_offset += temp_bytes; 893 odev->rx_buf_size += temp_bytes; 894 if (!odev->rx_buf_missing) { 895 /* Packet is complete. Inject into stack. */ 896 /* We have IP packet here */ 897 odev->skb_rx_buf->protocol = 898 __constant_htons(ETH_P_IP); 899 /* don't check it */ 900 odev->skb_rx_buf->ip_summed = 901 CHECKSUM_UNNECESSARY; 902 903 skb_reset_mac_header(odev->skb_rx_buf); 904 905 /* Ship it off to the kernel */ 906 netif_rx(odev->skb_rx_buf); 907 /* No longer our buffer. */ 908 odev->skb_rx_buf = NULL; 909 910 /* update out statistics */ 911 odev->net->stats.rx_packets++; 912 913 odev->net->stats.rx_bytes += odev->rx_buf_size; 914 915 odev->rx_buf_size = 0; 916 odev->rx_buf_missing = sizeof(struct iphdr); 917 odev->rx_parse_state = WAIT_IP; 918 } 919 break; 920 921 case WAIT_SYNC: 922 D1(" W_S"); 923 count = 0; 924 break; 925 default: 926 D1(" "); 927 count--; 928 break; 929 } 930 } 931 932 /* Recovery mechanism for WAIT_SYNC state. */ 933 if (is_eop) { 934 if (odev->rx_parse_state == WAIT_SYNC) { 935 odev->rx_parse_state = WAIT_IP; 936 odev->rx_buf_size = 0; 937 odev->rx_buf_missing = sizeof(struct iphdr); 938 } 939 } 940} 941 942/* Moving data from usb to kernel (in interrupt state) */ 943static void read_bulk_callback(struct urb *urb) 944{ 945 struct hso_net *odev = urb->context; 946 struct net_device *net; 947 int result; 948 int status = urb->status; 949 950 /* is al ok? (Filip: Who's Al ?) */ 951 if (status) { 952 log_usb_status(status, __func__); 953 return; 954 } 955 956 /* Sanity check */ 957 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 958 D1("BULK IN callback but driver is not active!"); 959 return; 960 } 961 usb_mark_last_busy(urb->dev); 962 963 net = odev->net; 964 965 if (!netif_device_present(net)) { 966 /* Somebody killed our network interface... */ 967 return; 968 } 969 970 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { 971 u32 rest; 972 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 973 rest = urb->actual_length % odev->in_endp->wMaxPacketSize; 974 if (((rest == 5) || (rest == 6)) 975 && !memcmp(((u8 *) urb->transfer_buffer) + 976 urb->actual_length - 4, crc_check, 4)) { 977 urb->actual_length -= 4; 978 } 979 } 980 981 /* do we even have a packet? */ 982 if (urb->actual_length) { 983 /* Handle the IP stream, add header and push it onto network 984 * stack if the packet is complete. */ 985 spin_lock(&odev->net_lock); 986 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 987 (urb->transfer_buffer_length > 988 urb->actual_length) ? 1 : 0); 989 spin_unlock(&odev->net_lock); 990 } 991 992 /* We are done with this URB, resubmit it. Prep the USB to wait for 993 * another frame. Reuse same as received. */ 994 usb_fill_bulk_urb(urb, 995 odev->parent->usb, 996 usb_rcvbulkpipe(odev->parent->usb, 997 odev->in_endp-> 998 bEndpointAddress & 0x7F), 999 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1000 read_bulk_callback, odev); 1001 1002 /* Give this to the USB subsystem so it can tell us when more data 1003 * arrives. */ 1004 result = usb_submit_urb(urb, GFP_ATOMIC); 1005 if (result) 1006 dev_warn(&odev->parent->interface->dev, 1007 "%s failed submit mux_bulk_rx_urb %d", __func__, 1008 result); 1009} 1010 1011/* Serial driver functions */ 1012 1013static void _hso_serial_set_termios(struct tty_struct *tty, 1014 struct ktermios *old) 1015{ 1016 struct hso_serial *serial = get_serial_by_tty(tty); 1017 struct ktermios *termios; 1018 1019 if ((!tty) || (!tty->termios) || (!serial)) { 1020 printk(KERN_ERR "%s: no tty structures", __func__); 1021 return; 1022 } 1023 1024 D4("port %d", serial->minor); 1025 1026 /* 1027 * The default requirements for this device are: 1028 */ 1029 termios = tty->termios; 1030 termios->c_iflag &= 1031 ~(IGNBRK /* disable ignore break */ 1032 | BRKINT /* disable break causes interrupt */ 1033 | PARMRK /* disable mark parity errors */ 1034 | ISTRIP /* disable clear high bit of input characters */ 1035 | INLCR /* disable translate NL to CR */ 1036 | IGNCR /* disable ignore CR */ 1037 | ICRNL /* disable translate CR to NL */ 1038 | IXON); /* disable enable XON/XOFF flow control */ 1039 1040 /* disable postprocess output characters */ 1041 termios->c_oflag &= ~OPOST; 1042 1043 termios->c_lflag &= 1044 ~(ECHO /* disable echo input characters */ 1045 | ECHONL /* disable echo new line */ 1046 | ICANON /* disable erase, kill, werase, and rprnt 1047 special characters */ 1048 | ISIG /* disable interrupt, quit, and suspend special 1049 characters */ 1050 | IEXTEN); /* disable non-POSIX special characters */ 1051 1052 termios->c_cflag &= 1053 ~(CSIZE /* no size */ 1054 | PARENB /* disable parity bit */ 1055 | CBAUD /* clear current baud rate */ 1056 | CBAUDEX); /* clear current buad rate */ 1057 1058 termios->c_cflag |= CS8; /* character size 8 bits */ 1059 1060 /* baud rate 115200 */ 1061 tty_encode_baud_rate(serial->tty, 115200, 115200); 1062 1063 /* 1064 * Force low_latency on; otherwise the pushes are scheduled; 1065 * this is bad as it opens up the possibility of dropping bytes 1066 * on the floor. We don't want to drop bytes on the floor. :) 1067 */ 1068 serial->tty->low_latency = 1; 1069 return; 1070} 1071 1072static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1073{ 1074 int result; 1075#ifdef CONFIG_HSO_AUTOPM 1076 usb_mark_last_busy(urb->dev); 1077#endif 1078 /* We are done with this URB, resubmit it. Prep the USB to wait for 1079 * another frame */ 1080 usb_fill_bulk_urb(urb, serial->parent->usb, 1081 usb_rcvbulkpipe(serial->parent->usb, 1082 serial->in_endp-> 1083 bEndpointAddress & 0x7F), 1084 urb->transfer_buffer, serial->rx_data_length, 1085 hso_std_serial_read_bulk_callback, serial); 1086 /* Give this to the USB subsystem so it can tell us when more data 1087 * arrives. */ 1088 result = usb_submit_urb(urb, GFP_ATOMIC); 1089 if (result) { 1090 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1091 __func__, result); 1092 } 1093} 1094 1095 1096 1097 1098static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1099{ 1100 int count; 1101 struct urb *curr_urb; 1102 1103 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1104 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1105 count = put_rxbuf_data(curr_urb, serial); 1106 if (count == -1) 1107 return; 1108 if (count == 0) { 1109 serial->curr_rx_urb_idx++; 1110 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1111 serial->curr_rx_urb_idx = 0; 1112 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1113 } 1114 } 1115} 1116 1117static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1118{ 1119 int count = 0; 1120 struct urb *urb; 1121 1122 urb = serial->rx_urb[0]; 1123 if (serial->open_count > 0) { 1124 count = put_rxbuf_data(urb, serial); 1125 if (count == -1) 1126 return; 1127 } 1128 /* Re issue a read as long as we receive data. */ 1129 1130 if (count == 0 && ((urb->actual_length != 0) || 1131 (serial->rx_state == RX_PENDING))) { 1132 serial->rx_state = RX_SENT; 1133 hso_mux_serial_read(serial); 1134 } else 1135 serial->rx_state = RX_IDLE; 1136} 1137 1138 1139/* read callback for Diag and CS port */ 1140static void hso_std_serial_read_bulk_callback(struct urb *urb) 1141{ 1142 struct hso_serial *serial = urb->context; 1143 int status = urb->status; 1144 1145 /* sanity check */ 1146 if (!serial) { 1147 D1("serial == NULL"); 1148 return; 1149 } else if (status) { 1150 log_usb_status(status, __func__); 1151 return; 1152 } 1153 1154 D4("\n--- Got serial_read_bulk callback %02x ---", status); 1155 D1("Actual length = %d\n", urb->actual_length); 1156 DUMP1(urb->transfer_buffer, urb->actual_length); 1157 1158 /* Anyone listening? */ 1159 if (serial->open_count == 0) 1160 return; 1161 1162 if (status == 0) { 1163 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { 1164 u32 rest; 1165 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 1166 rest = 1167 urb->actual_length % 1168 serial->in_endp->wMaxPacketSize; 1169 if (((rest == 5) || (rest == 6)) 1170 && !memcmp(((u8 *) urb->transfer_buffer) + 1171 urb->actual_length - 4, crc_check, 4)) { 1172 urb->actual_length -= 4; 1173 } 1174 } 1175 /* Valid data, handle RX data */ 1176 spin_lock(&serial->serial_lock); 1177 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1178 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1179 spin_unlock(&serial->serial_lock); 1180 } else if (status == -ENOENT || status == -ECONNRESET) { 1181 /* Unlinked - check for throttled port. */ 1182 D2("Port %d, successfully unlinked urb", serial->minor); 1183 spin_lock(&serial->serial_lock); 1184 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1185 hso_resubmit_rx_bulk_urb(serial, urb); 1186 spin_unlock(&serial->serial_lock); 1187 } else { 1188 D2("Port %d, status = %d for read urb", serial->minor, status); 1189 return; 1190 } 1191} 1192 1193/* 1194 * This needs to be a tasklet otherwise we will 1195 * end up recursively calling this function. 1196 */ 1197void hso_unthrottle_tasklet(struct hso_serial *serial) 1198{ 1199 unsigned long flags; 1200 1201 spin_lock_irqsave(&serial->serial_lock, flags); 1202 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1203 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1204 else 1205 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1206 spin_unlock_irqrestore(&serial->serial_lock, flags); 1207} 1208 1209static void hso_unthrottle(struct tty_struct *tty) 1210{ 1211 struct hso_serial *serial = get_serial_by_tty(tty); 1212 1213 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1214} 1215 1216void hso_unthrottle_workfunc(struct work_struct *work) 1217{ 1218 struct hso_serial *serial = 1219 container_of(work, struct hso_serial, 1220 retry_unthrottle_workqueue); 1221 hso_unthrottle_tasklet(serial); 1222} 1223 1224/* open the requested serial port */ 1225static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1226{ 1227 struct hso_serial *serial = get_serial_by_index(tty->index); 1228 int result; 1229 1230 /* sanity check */ 1231 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1232 tty->driver_data = NULL; 1233 D1("Failed to open port"); 1234 return -ENODEV; 1235 } 1236 1237 mutex_lock(&serial->parent->mutex); 1238 /* check for port already opened, if not set the termios */ 1239 /* The serial->open count needs to be here as hso_serial_close 1240 * will be called even if hso_serial_open returns -ENODEV. 1241 */ 1242 serial->open_count++; 1243 result = usb_autopm_get_interface(serial->parent->interface); 1244 if (result < 0) 1245 goto err_out; 1246 1247 D1("Opening %d", serial->minor); 1248 kref_get(&serial->parent->ref); 1249 1250 /* setup */ 1251 tty->driver_data = serial; 1252 serial->tty = tty; 1253 1254 if (serial->open_count == 1) { 1255 tty->low_latency = 1; 1256 serial->rx_state = RX_IDLE; 1257 /* Force default termio settings */ 1258 _hso_serial_set_termios(tty, NULL); 1259 tasklet_init(&serial->unthrottle_tasklet, 1260 (void (*)(unsigned long))hso_unthrottle_tasklet, 1261 (unsigned long)serial); 1262 INIT_WORK(&serial->retry_unthrottle_workqueue, 1263 hso_unthrottle_workfunc); 1264 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1265 if (result) { 1266 hso_stop_serial_device(serial->parent); 1267 serial->open_count--; 1268 kref_put(&serial->parent->ref, hso_serial_ref_free); 1269 } 1270 } else { 1271 D1("Port was already open"); 1272 } 1273 1274 usb_autopm_put_interface(serial->parent->interface); 1275 1276 /* done */ 1277 if (result) 1278 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); 1279err_out: 1280 mutex_unlock(&serial->parent->mutex); 1281 return result; 1282} 1283 1284/* close the requested serial port */ 1285static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1286{ 1287 struct hso_serial *serial = tty->driver_data; 1288 u8 usb_gone; 1289 1290 D1("Closing serial port"); 1291 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1292 D1("invalid serial structure bailing out.\n"); 1293 return; 1294 } 1295 1296 mutex_lock(&serial->parent->mutex); 1297 usb_gone = serial->parent->usb_gone; 1298 1299 if (!usb_gone) 1300 usb_autopm_get_interface(serial->parent->interface); 1301 1302 /* reset the rts and dtr */ 1303 /* do the actual close */ 1304 serial->open_count--; 1305 kref_put(&serial->parent->ref, hso_serial_ref_free); 1306 if (serial->open_count <= 0) { 1307 serial->open_count = 0; 1308 if (serial->tty) { 1309 serial->tty->driver_data = NULL; 1310 serial->tty = NULL; 1311 } 1312 if (!usb_gone) 1313 hso_stop_serial_device(serial->parent); 1314 tasklet_kill(&serial->unthrottle_tasklet); 1315 cancel_work_sync(&serial->retry_unthrottle_workqueue); 1316 } 1317 1318 if (!usb_gone) 1319 usb_autopm_put_interface(serial->parent->interface); 1320 1321 mutex_unlock(&serial->parent->mutex); 1322} 1323 1324/* close the requested serial port */ 1325static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1326 int count) 1327{ 1328 struct hso_serial *serial = get_serial_by_tty(tty); 1329 int space, tx_bytes; 1330 unsigned long flags; 1331 1332 /* sanity check */ 1333 if (serial == NULL) { 1334 printk(KERN_ERR "%s: serial is NULL\n", __func__); 1335 return -ENODEV; 1336 } 1337 1338 spin_lock_irqsave(&serial->serial_lock, flags); 1339 1340 space = serial->tx_data_length - serial->tx_buffer_count; 1341 tx_bytes = (count < space) ? count : space; 1342 1343 if (!tx_bytes) 1344 goto out; 1345 1346 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1347 serial->tx_buffer_count += tx_bytes; 1348 1349out: 1350 spin_unlock_irqrestore(&serial->serial_lock, flags); 1351 1352 hso_kick_transmit(serial); 1353 /* done */ 1354 return tx_bytes; 1355} 1356 1357/* how much room is there for writing */ 1358static int hso_serial_write_room(struct tty_struct *tty) 1359{ 1360 struct hso_serial *serial = get_serial_by_tty(tty); 1361 int room; 1362 unsigned long flags; 1363 1364 spin_lock_irqsave(&serial->serial_lock, flags); 1365 room = serial->tx_data_length - serial->tx_buffer_count; 1366 spin_unlock_irqrestore(&serial->serial_lock, flags); 1367 1368 /* return free room */ 1369 return room; 1370} 1371 1372/* setup the term */ 1373static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1374{ 1375 struct hso_serial *serial = get_serial_by_tty(tty); 1376 unsigned long flags; 1377 1378 if (old) 1379 D5("Termios called with: cflags new[%d] - old[%d]", 1380 tty->termios->c_cflag, old->c_cflag); 1381 1382 /* the actual setup */ 1383 spin_lock_irqsave(&serial->serial_lock, flags); 1384 if (serial->open_count) 1385 _hso_serial_set_termios(tty, old); 1386 else 1387 tty->termios = old; 1388 spin_unlock_irqrestore(&serial->serial_lock, flags); 1389 1390 /* done */ 1391 return; 1392} 1393 1394/* how many characters in the buffer */ 1395static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1396{ 1397 struct hso_serial *serial = get_serial_by_tty(tty); 1398 int chars; 1399 unsigned long flags; 1400 1401 /* sanity check */ 1402 if (serial == NULL) 1403 return 0; 1404 1405 spin_lock_irqsave(&serial->serial_lock, flags); 1406 chars = serial->tx_buffer_count; 1407 spin_unlock_irqrestore(&serial->serial_lock, flags); 1408 1409 return chars; 1410} 1411 1412static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) 1413{ 1414 unsigned int value; 1415 struct hso_serial *serial = get_serial_by_tty(tty); 1416 unsigned long flags; 1417 1418 /* sanity check */ 1419 if (!serial) { 1420 D1("no tty structures"); 1421 return -EINVAL; 1422 } 1423 1424 spin_lock_irqsave(&serial->serial_lock, flags); 1425 value = ((serial->rts_state) ? TIOCM_RTS : 0) | 1426 ((serial->dtr_state) ? TIOCM_DTR : 0); 1427 spin_unlock_irqrestore(&serial->serial_lock, flags); 1428 1429 return value; 1430} 1431 1432static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, 1433 unsigned int set, unsigned int clear) 1434{ 1435 int val = 0; 1436 unsigned long flags; 1437 int if_num; 1438 struct hso_serial *serial = get_serial_by_tty(tty); 1439 1440 /* sanity check */ 1441 if (!serial) { 1442 D1("no tty structures"); 1443 return -EINVAL; 1444 } 1445 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; 1446 1447 spin_lock_irqsave(&serial->serial_lock, flags); 1448 if (set & TIOCM_RTS) 1449 serial->rts_state = 1; 1450 if (set & TIOCM_DTR) 1451 serial->dtr_state = 1; 1452 1453 if (clear & TIOCM_RTS) 1454 serial->rts_state = 0; 1455 if (clear & TIOCM_DTR) 1456 serial->dtr_state = 0; 1457 1458 if (serial->dtr_state) 1459 val |= 0x01; 1460 if (serial->rts_state) 1461 val |= 0x02; 1462 1463 spin_unlock_irqrestore(&serial->serial_lock, flags); 1464 1465 return usb_control_msg(serial->parent->usb, 1466 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1467 0x21, val, if_num, NULL, 0, 1468 USB_CTRL_SET_TIMEOUT); 1469} 1470 1471/* starts a transmit */ 1472static void hso_kick_transmit(struct hso_serial *serial) 1473{ 1474 u8 *temp; 1475 unsigned long flags; 1476 int res; 1477 1478 spin_lock_irqsave(&serial->serial_lock, flags); 1479 if (!serial->tx_buffer_count) 1480 goto out; 1481 1482 if (serial->tx_urb_used) 1483 goto out; 1484 1485 /* Wakeup USB interface if necessary */ 1486 if (hso_get_activity(serial->parent) == -EAGAIN) 1487 goto out; 1488 1489 /* Switch pointers around to avoid memcpy */ 1490 temp = serial->tx_buffer; 1491 serial->tx_buffer = serial->tx_data; 1492 serial->tx_data = temp; 1493 serial->tx_data_count = serial->tx_buffer_count; 1494 serial->tx_buffer_count = 0; 1495 1496 /* If temp is set, it means we switched buffers */ 1497 if (temp && serial->write_data) { 1498 res = serial->write_data(serial); 1499 if (res >= 0) 1500 serial->tx_urb_used = 1; 1501 } 1502out: 1503 spin_unlock_irqrestore(&serial->serial_lock, flags); 1504} 1505 1506/* make a request (for reading and writing data to muxed serial port) */ 1507static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1508 struct urb *ctrl_urb, 1509 struct usb_ctrlrequest *ctrl_req, 1510 u8 *ctrl_urb_data, u32 size) 1511{ 1512 int result; 1513 int pipe; 1514 1515 /* Sanity check */ 1516 if (!serial || !ctrl_urb || !ctrl_req) { 1517 printk(KERN_ERR "%s: Wrong arguments\n", __func__); 1518 return -EINVAL; 1519 } 1520 1521 /* initialize */ 1522 ctrl_req->wValue = 0; 1523 ctrl_req->wIndex = hso_port_to_mux(port); 1524 ctrl_req->wLength = size; 1525 1526 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1527 /* Reading command */ 1528 ctrl_req->bRequestType = USB_DIR_IN | 1529 USB_TYPE_OPTION_VENDOR | 1530 USB_RECIP_INTERFACE; 1531 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1532 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1533 } else { 1534 /* Writing command */ 1535 ctrl_req->bRequestType = USB_DIR_OUT | 1536 USB_TYPE_OPTION_VENDOR | 1537 USB_RECIP_INTERFACE; 1538 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1539 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1540 } 1541 /* syslog */ 1542 D2("%s command (%02x) len: %d, port: %d", 1543 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1544 ctrl_req->bRequestType, ctrl_req->wLength, port); 1545 1546 /* Load ctrl urb */ 1547 ctrl_urb->transfer_flags = 0; 1548 usb_fill_control_urb(ctrl_urb, 1549 serial->parent->usb, 1550 pipe, 1551 (u8 *) ctrl_req, 1552 ctrl_urb_data, size, ctrl_callback, serial); 1553 /* Send it on merry way */ 1554 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1555 if (result) { 1556 dev_err(&ctrl_urb->dev->dev, 1557 "%s failed submit ctrl_urb %d type %d", __func__, 1558 result, type); 1559 return result; 1560 } 1561 1562 /* done */ 1563 return size; 1564} 1565 1566/* called by intr_callback when read occurs */ 1567static int hso_mux_serial_read(struct hso_serial *serial) 1568{ 1569 if (!serial) 1570 return -EINVAL; 1571 1572 /* clean data */ 1573 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1574 /* make the request */ 1575 1576 if (serial->num_rx_urbs != 1) { 1577 dev_err(&serial->parent->interface->dev, 1578 "ERROR: mux'd reads with multiple buffers " 1579 "not possible\n"); 1580 return 0; 1581 } 1582 return mux_device_request(serial, 1583 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1584 serial->parent->port_spec & HSO_PORT_MASK, 1585 serial->rx_urb[0], 1586 &serial->ctrl_req_rx, 1587 serial->rx_data[0], serial->rx_data_length); 1588} 1589 1590/* used for muxed serial port callback (muxed serial read) */ 1591static void intr_callback(struct urb *urb) 1592{ 1593 struct hso_shared_int *shared_int = urb->context; 1594 struct hso_serial *serial; 1595 unsigned char *port_req; 1596 int status = urb->status; 1597 int i; 1598 1599 usb_mark_last_busy(urb->dev); 1600 1601 /* sanity check */ 1602 if (!shared_int) 1603 return; 1604 1605 /* status check */ 1606 if (status) { 1607 log_usb_status(status, __func__); 1608 return; 1609 } 1610 D4("\n--- Got intr callback 0x%02X ---", status); 1611 1612 /* what request? */ 1613 port_req = urb->transfer_buffer; 1614 D4(" port_req = 0x%.2X\n", *port_req); 1615 /* loop over all muxed ports to find the one sending this */ 1616 for (i = 0; i < 8; i++) { 1617 /* max 8 channels on MUX */ 1618 if (*port_req & (1 << i)) { 1619 serial = get_serial_by_shared_int_and_type(shared_int, 1620 (1 << i)); 1621 if (serial != NULL) { 1622 D1("Pending read interrupt on port %d\n", i); 1623 spin_lock(&serial->serial_lock); 1624 if (serial->rx_state == RX_IDLE) { 1625 /* Setup and send a ctrl req read on 1626 * port i */ 1627 if (!serial->rx_urb_filled[0]) { 1628 serial->rx_state = RX_SENT; 1629 hso_mux_serial_read(serial); 1630 } else 1631 serial->rx_state = RX_PENDING; 1632 1633 } else { 1634 D1("Already pending a read on " 1635 "port %d\n", i); 1636 } 1637 spin_unlock(&serial->serial_lock); 1638 } 1639 } 1640 } 1641 /* Resubmit interrupt urb */ 1642 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1643} 1644 1645/* called for writing to muxed serial port */ 1646static int hso_mux_serial_write_data(struct hso_serial *serial) 1647{ 1648 if (NULL == serial) 1649 return -EINVAL; 1650 1651 return mux_device_request(serial, 1652 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1653 serial->parent->port_spec & HSO_PORT_MASK, 1654 serial->tx_urb, 1655 &serial->ctrl_req_tx, 1656 serial->tx_data, serial->tx_data_count); 1657} 1658 1659/* write callback for Diag and CS port */ 1660static void hso_std_serial_write_bulk_callback(struct urb *urb) 1661{ 1662 struct hso_serial *serial = urb->context; 1663 int status = urb->status; 1664 1665 /* sanity check */ 1666 if (!serial) { 1667 D1("serial == NULL"); 1668 return; 1669 } 1670 1671 spin_lock(&serial->serial_lock); 1672 serial->tx_urb_used = 0; 1673 spin_unlock(&serial->serial_lock); 1674 if (status) { 1675 log_usb_status(status, __func__); 1676 return; 1677 } 1678 hso_put_activity(serial->parent); 1679 if (serial->tty) 1680 tty_wakeup(serial->tty); 1681 hso_kick_transmit(serial); 1682 1683 D1(" "); 1684 return; 1685} 1686 1687/* called for writing diag or CS serial port */ 1688static int hso_std_serial_write_data(struct hso_serial *serial) 1689{ 1690 int count = serial->tx_data_count; 1691 int result; 1692 1693 usb_fill_bulk_urb(serial->tx_urb, 1694 serial->parent->usb, 1695 usb_sndbulkpipe(serial->parent->usb, 1696 serial->out_endp-> 1697 bEndpointAddress & 0x7F), 1698 serial->tx_data, serial->tx_data_count, 1699 hso_std_serial_write_bulk_callback, serial); 1700 1701 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1702 if (result) { 1703 dev_warn(&serial->parent->usb->dev, 1704 "Failed to submit urb - res %d\n", result); 1705 return result; 1706 } 1707 1708 return count; 1709} 1710 1711/* callback after read or write on muxed serial port */ 1712static void ctrl_callback(struct urb *urb) 1713{ 1714 struct hso_serial *serial = urb->context; 1715 struct usb_ctrlrequest *req; 1716 int status = urb->status; 1717 1718 /* sanity check */ 1719 if (!serial) 1720 return; 1721 1722 spin_lock(&serial->serial_lock); 1723 serial->tx_urb_used = 0; 1724 spin_unlock(&serial->serial_lock); 1725 if (status) { 1726 log_usb_status(status, __func__); 1727 return; 1728 } 1729 1730 /* what request? */ 1731 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1732 D4("\n--- Got muxed ctrl callback 0x%02X ---", status); 1733 D4("Actual length of urb = %d\n", urb->actual_length); 1734 DUMP1(urb->transfer_buffer, urb->actual_length); 1735 1736 if (req->bRequestType == 1737 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1738 /* response to a read command */ 1739 serial->rx_urb_filled[0] = 1; 1740 spin_lock(&serial->serial_lock); 1741 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1742 spin_unlock(&serial->serial_lock); 1743 } else { 1744 hso_put_activity(serial->parent); 1745 if (serial->tty) 1746 tty_wakeup(serial->tty); 1747 /* response to a write command */ 1748 hso_kick_transmit(serial); 1749 } 1750} 1751 1752/* handle RX data for serial port */ 1753static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 1754{ 1755 struct tty_struct *tty = serial->tty; 1756 int write_length_remaining = 0; 1757 int curr_write_len; 1758 /* Sanity check */ 1759 if (urb == NULL || serial == NULL) { 1760 D1("serial = NULL"); 1761 return -2; 1762 } 1763 1764 /* Push data to tty */ 1765 if (tty) { 1766 write_length_remaining = urb->actual_length - 1767 serial->curr_rx_urb_offset; 1768 D1("data to push to tty"); 1769 while (write_length_remaining) { 1770 if (test_bit(TTY_THROTTLED, &tty->flags)) 1771 return -1; 1772 curr_write_len = tty_insert_flip_string 1773 (tty, urb->transfer_buffer + 1774 serial->curr_rx_urb_offset, 1775 write_length_remaining); 1776 serial->curr_rx_urb_offset += curr_write_len; 1777 write_length_remaining -= curr_write_len; 1778 tty_flip_buffer_push(tty); 1779 } 1780 } 1781 if (write_length_remaining == 0) { 1782 serial->curr_rx_urb_offset = 0; 1783 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 1784 } 1785 return write_length_remaining; 1786} 1787 1788 1789/* Base driver functions */ 1790 1791static void hso_log_port(struct hso_device *hso_dev) 1792{ 1793 char *port_type; 1794 char port_dev[20]; 1795 1796 switch (hso_dev->port_spec & HSO_PORT_MASK) { 1797 case HSO_PORT_CONTROL: 1798 port_type = "Control"; 1799 break; 1800 case HSO_PORT_APP: 1801 port_type = "Application"; 1802 break; 1803 case HSO_PORT_GPS: 1804 port_type = "GPS"; 1805 break; 1806 case HSO_PORT_GPS_CONTROL: 1807 port_type = "GPS control"; 1808 break; 1809 case HSO_PORT_APP2: 1810 port_type = "Application2"; 1811 break; 1812 case HSO_PORT_PCSC: 1813 port_type = "PCSC"; 1814 break; 1815 case HSO_PORT_DIAG: 1816 port_type = "Diagnostic"; 1817 break; 1818 case HSO_PORT_DIAG2: 1819 port_type = "Diagnostic2"; 1820 break; 1821 case HSO_PORT_MODEM: 1822 port_type = "Modem"; 1823 break; 1824 case HSO_PORT_NETWORK: 1825 port_type = "Network"; 1826 break; 1827 default: 1828 port_type = "Unknown"; 1829 break; 1830 } 1831 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 1832 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 1833 } else 1834 sprintf(port_dev, "/dev/%s%d", tty_filename, 1835 dev2ser(hso_dev)->minor); 1836 1837 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 1838 port_type, port_dev); 1839} 1840 1841static int hso_start_net_device(struct hso_device *hso_dev) 1842{ 1843 int i, result = 0; 1844 struct hso_net *hso_net = dev2net(hso_dev); 1845 1846 if (!hso_net) 1847 return -ENODEV; 1848 1849 /* send URBs for all read buffers */ 1850 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 1851 1852 /* Prep a receive URB */ 1853 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 1854 hso_dev->usb, 1855 usb_rcvbulkpipe(hso_dev->usb, 1856 hso_net->in_endp-> 1857 bEndpointAddress & 0x7F), 1858 hso_net->mux_bulk_rx_buf_pool[i], 1859 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 1860 hso_net); 1861 1862 /* Put it out there so the device can send us stuff */ 1863 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 1864 GFP_NOIO); 1865 if (result) 1866 dev_warn(&hso_dev->usb->dev, 1867 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 1868 i, result); 1869 } 1870 1871 return result; 1872} 1873 1874static int hso_stop_net_device(struct hso_device *hso_dev) 1875{ 1876 int i; 1877 struct hso_net *hso_net = dev2net(hso_dev); 1878 1879 if (!hso_net) 1880 return -ENODEV; 1881 1882 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 1883 if (hso_net->mux_bulk_rx_urb_pool[i]) 1884 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 1885 1886 } 1887 if (hso_net->mux_bulk_tx_urb) 1888 usb_kill_urb(hso_net->mux_bulk_tx_urb); 1889 1890 return 0; 1891} 1892 1893static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 1894{ 1895 int i, result = 0; 1896 struct hso_serial *serial = dev2ser(hso_dev); 1897 1898 if (!serial) 1899 return -ENODEV; 1900 1901 /* If it is not the MUX port fill in and submit a bulk urb (already 1902 * allocated in hso_serial_start) */ 1903 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 1904 for (i = 0; i < serial->num_rx_urbs; i++) { 1905 usb_fill_bulk_urb(serial->rx_urb[i], 1906 serial->parent->usb, 1907 usb_rcvbulkpipe(serial->parent->usb, 1908 serial->in_endp-> 1909 bEndpointAddress & 1910 0x7F), 1911 serial->rx_data[i], 1912 serial->rx_data_length, 1913 hso_std_serial_read_bulk_callback, 1914 serial); 1915 result = usb_submit_urb(serial->rx_urb[i], flags); 1916 if (result) { 1917 dev_warn(&serial->parent->usb->dev, 1918 "Failed to submit urb - res %d\n", 1919 result); 1920 break; 1921 } 1922 } 1923 } else { 1924 mutex_lock(&serial->shared_int->shared_int_lock); 1925 if (!serial->shared_int->use_count) { 1926 result = 1927 hso_mux_submit_intr_urb(serial->shared_int, 1928 hso_dev->usb, flags); 1929 } 1930 serial->shared_int->use_count++; 1931 mutex_unlock(&serial->shared_int->shared_int_lock); 1932 } 1933 1934 return result; 1935} 1936 1937static int hso_stop_serial_device(struct hso_device *hso_dev) 1938{ 1939 int i; 1940 struct hso_serial *serial = dev2ser(hso_dev); 1941 1942 if (!serial) 1943 return -ENODEV; 1944 1945 for (i = 0; i < serial->num_rx_urbs; i++) { 1946 if (serial->rx_urb[i]) { 1947 usb_kill_urb(serial->rx_urb[i]); 1948 serial->rx_urb_filled[i] = 0; 1949 } 1950 } 1951 serial->curr_rx_urb_idx = 0; 1952 serial->curr_rx_urb_offset = 0; 1953 1954 if (serial->tx_urb) 1955 usb_kill_urb(serial->tx_urb); 1956 1957 if (serial->shared_int) { 1958 mutex_lock(&serial->shared_int->shared_int_lock); 1959 if (serial->shared_int->use_count && 1960 (--serial->shared_int->use_count == 0)) { 1961 struct urb *urb; 1962 1963 urb = serial->shared_int->shared_intr_urb; 1964 if (urb) 1965 usb_kill_urb(urb); 1966 } 1967 mutex_unlock(&serial->shared_int->shared_int_lock); 1968 } 1969 1970 return 0; 1971} 1972 1973static void hso_serial_common_free(struct hso_serial *serial) 1974{ 1975 int i; 1976 1977 if (serial->parent->dev) 1978 device_remove_file(serial->parent->dev, &dev_attr_hsotype); 1979 1980 tty_unregister_device(tty_drv, serial->minor); 1981 1982 for (i = 0; i < serial->num_rx_urbs; i++) { 1983 /* unlink and free RX URB */ 1984 usb_free_urb(serial->rx_urb[i]); 1985 /* free the RX buffer */ 1986 kfree(serial->rx_data[i]); 1987 } 1988 1989 /* unlink and free TX URB */ 1990 usb_free_urb(serial->tx_urb); 1991 kfree(serial->tx_data); 1992} 1993 1994static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 1995 int rx_size, int tx_size) 1996{ 1997 struct device *dev; 1998 int minor; 1999 int i; 2000 2001 minor = get_free_serial_index(); 2002 if (minor < 0) 2003 goto exit; 2004 2005 /* register our minor number */ 2006 serial->parent->dev = tty_register_device(tty_drv, minor, 2007 &serial->parent->interface->dev); 2008 dev = serial->parent->dev; 2009 dev->driver_data = serial->parent; 2010 i = device_create_file(dev, &dev_attr_hsotype); 2011 2012 /* fill in specific data for later use */ 2013 serial->minor = minor; 2014 serial->magic = HSO_SERIAL_MAGIC; 2015 spin_lock_init(&serial->serial_lock); 2016 serial->num_rx_urbs = num_urbs; 2017 2018 /* RX, allocate urb and initialize */ 2019 2020 /* prepare our RX buffer */ 2021 serial->rx_data_length = rx_size; 2022 for (i = 0; i < serial->num_rx_urbs; i++) { 2023 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2024 if (!serial->rx_urb[i]) { 2025 dev_err(dev, "Could not allocate urb?\n"); 2026 goto exit; 2027 } 2028 serial->rx_urb[i]->transfer_buffer = NULL; 2029 serial->rx_urb[i]->transfer_buffer_length = 0; 2030 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2031 GFP_KERNEL); 2032 if (!serial->rx_data[i]) { 2033 dev_err(dev, "%s - Out of memory\n", __func__); 2034 goto exit; 2035 } 2036 } 2037 2038 /* TX, allocate urb and initialize */ 2039 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2040 if (!serial->tx_urb) { 2041 dev_err(dev, "Could not allocate urb?\n"); 2042 goto exit; 2043 } 2044 serial->tx_urb->transfer_buffer = NULL; 2045 serial->tx_urb->transfer_buffer_length = 0; 2046 /* prepare our TX buffer */ 2047 serial->tx_data_count = 0; 2048 serial->tx_buffer_count = 0; 2049 serial->tx_data_length = tx_size; 2050 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2051 if (!serial->tx_data) { 2052 dev_err(dev, "%s - Out of memory", __func__); 2053 goto exit; 2054 } 2055 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2056 if (!serial->tx_buffer) { 2057 dev_err(dev, "%s - Out of memory", __func__); 2058 goto exit; 2059 } 2060 2061 return 0; 2062exit: 2063 hso_serial_common_free(serial); 2064 return -1; 2065} 2066 2067/* Frees a general hso device */ 2068static void hso_free_device(struct hso_device *hso_dev) 2069{ 2070 kfree(hso_dev); 2071} 2072 2073/* Creates a general hso device */ 2074static struct hso_device *hso_create_device(struct usb_interface *intf, 2075 int port_spec) 2076{ 2077 struct hso_device *hso_dev; 2078 2079 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2080 if (!hso_dev) 2081 return NULL; 2082 2083 hso_dev->port_spec = port_spec; 2084 hso_dev->usb = interface_to_usbdev(intf); 2085 hso_dev->interface = intf; 2086 kref_init(&hso_dev->ref); 2087 mutex_init(&hso_dev->mutex); 2088 2089 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2090 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2091 2092 return hso_dev; 2093} 2094 2095/* Removes a network device in the network device table */ 2096static int remove_net_device(struct hso_device *hso_dev) 2097{ 2098 int i; 2099 2100 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2101 if (network_table[i] == hso_dev) { 2102 network_table[i] = NULL; 2103 break; 2104 } 2105 } 2106 if (i == HSO_MAX_NET_DEVICES) 2107 return -1; 2108 return 0; 2109} 2110 2111/* Frees our network device */ 2112static void hso_free_net_device(struct hso_device *hso_dev) 2113{ 2114 int i; 2115 struct hso_net *hso_net = dev2net(hso_dev); 2116 2117 if (!hso_net) 2118 return; 2119 2120 /* start freeing */ 2121 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2122 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2123 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2124 } 2125 usb_free_urb(hso_net->mux_bulk_tx_urb); 2126 kfree(hso_net->mux_bulk_tx_buf); 2127 2128 remove_net_device(hso_net->parent); 2129 2130 if (hso_net->net) { 2131 unregister_netdev(hso_net->net); 2132 free_netdev(hso_net->net); 2133 } 2134 2135 hso_free_device(hso_dev); 2136} 2137 2138/* initialize the network interface */ 2139static void hso_net_init(struct net_device *net) 2140{ 2141 struct hso_net *hso_net = netdev_priv(net); 2142 2143 D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); 2144 2145 /* fill in the other fields */ 2146 net->open = hso_net_open; 2147 net->stop = hso_net_close; 2148 net->hard_start_xmit = hso_net_start_xmit; 2149 net->tx_timeout = hso_net_tx_timeout; 2150 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2151 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2152 net->type = ARPHRD_NONE; 2153 net->mtu = DEFAULT_MTU - 14; 2154 net->tx_queue_len = 10; 2155 SET_ETHTOOL_OPS(net, &ops); 2156 2157 /* and initialize the semaphore */ 2158 spin_lock_init(&hso_net->net_lock); 2159} 2160 2161/* Adds a network device in the network device table */ 2162static int add_net_device(struct hso_device *hso_dev) 2163{ 2164 int i; 2165 2166 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2167 if (network_table[i] == NULL) { 2168 network_table[i] = hso_dev; 2169 break; 2170 } 2171 } 2172 if (i == HSO_MAX_NET_DEVICES) 2173 return -1; 2174 return 0; 2175} 2176 2177static int hso_radio_toggle(void *data, enum rfkill_state state) 2178{ 2179 struct hso_device *hso_dev = data; 2180 int enabled = (state == RFKILL_STATE_ON); 2181 int rv; 2182 2183 mutex_lock(&hso_dev->mutex); 2184 if (hso_dev->usb_gone) 2185 rv = 0; 2186 else 2187 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2188 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2189 USB_CTRL_SET_TIMEOUT); 2190 mutex_unlock(&hso_dev->mutex); 2191 return rv; 2192} 2193 2194/* Creates and sets up everything for rfkill */ 2195static void hso_create_rfkill(struct hso_device *hso_dev, 2196 struct usb_interface *interface) 2197{ 2198 struct hso_net *hso_net = dev2net(hso_dev); 2199 struct device *dev = &hso_net->net->dev; 2200 char *rfkn; 2201 2202 hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev, 2203 RFKILL_TYPE_WWAN); 2204 if (!hso_net->rfkill) { 2205 dev_err(dev, "%s - Out of memory\n", __func__); 2206 return; 2207 } 2208 rfkn = kzalloc(20, GFP_KERNEL); 2209 if (!rfkn) { 2210 rfkill_free(hso_net->rfkill); 2211 hso_net->rfkill = NULL; 2212 dev_err(dev, "%s - Out of memory\n", __func__); 2213 return; 2214 } 2215 snprintf(rfkn, 20, "hso-%d", 2216 interface->altsetting->desc.bInterfaceNumber); 2217 hso_net->rfkill->name = rfkn; 2218 hso_net->rfkill->state = RFKILL_STATE_ON; 2219 hso_net->rfkill->data = hso_dev; 2220 hso_net->rfkill->toggle_radio = hso_radio_toggle; 2221 if (rfkill_register(hso_net->rfkill) < 0) { 2222 kfree(rfkn); 2223 hso_net->rfkill->name = NULL; 2224 rfkill_free(hso_net->rfkill); 2225 hso_net->rfkill = NULL; 2226 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2227 return; 2228 } 2229} 2230 2231/* Creates our network device */ 2232static struct hso_device *hso_create_net_device(struct usb_interface *interface) 2233{ 2234 int result, i; 2235 struct net_device *net; 2236 struct hso_net *hso_net; 2237 struct hso_device *hso_dev; 2238 2239 hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK); 2240 if (!hso_dev) 2241 return NULL; 2242 2243 /* allocate our network device, then we can put in our private data */ 2244 /* call hso_net_init to do the basic initialization */ 2245 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); 2246 if (!net) { 2247 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2248 goto exit; 2249 } 2250 2251 hso_net = netdev_priv(net); 2252 2253 hso_dev->port_data.dev_net = hso_net; 2254 hso_net->net = net; 2255 hso_net->parent = hso_dev; 2256 2257 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2258 USB_DIR_IN); 2259 if (!hso_net->in_endp) { 2260 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2261 goto exit; 2262 } 2263 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2264 USB_DIR_OUT); 2265 if (!hso_net->out_endp) { 2266 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2267 goto exit; 2268 } 2269 SET_NETDEV_DEV(net, &interface->dev); 2270 2271 /* registering our net device */ 2272 result = register_netdev(net); 2273 if (result) { 2274 dev_err(&interface->dev, "Failed to register device\n"); 2275 goto exit; 2276 } 2277 2278 /* start allocating */ 2279 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2280 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2281 if (!hso_net->mux_bulk_rx_urb_pool[i]) { 2282 dev_err(&interface->dev, "Could not allocate rx urb\n"); 2283 goto exit; 2284 } 2285 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2286 GFP_KERNEL); 2287 if (!hso_net->mux_bulk_rx_buf_pool[i]) { 2288 dev_err(&interface->dev, "Could not allocate rx buf\n"); 2289 goto exit; 2290 } 2291 } 2292 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2293 if (!hso_net->mux_bulk_tx_urb) { 2294 dev_err(&interface->dev, "Could not allocate tx urb\n"); 2295 goto exit; 2296 } 2297 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2298 if (!hso_net->mux_bulk_tx_buf) { 2299 dev_err(&interface->dev, "Could not allocate tx buf\n"); 2300 goto exit; 2301 } 2302 2303 add_net_device(hso_dev); 2304 2305 hso_log_port(hso_dev); 2306 2307 hso_create_rfkill(hso_dev, interface); 2308 2309 return hso_dev; 2310exit: 2311 hso_free_net_device(hso_dev); 2312 return NULL; 2313} 2314 2315/* Frees an AT channel ( goes for both mux and non-mux ) */ 2316static void hso_free_serial_device(struct hso_device *hso_dev) 2317{ 2318 struct hso_serial *serial = dev2ser(hso_dev); 2319 2320 if (!serial) 2321 return; 2322 set_serial_by_index(serial->minor, NULL); 2323 2324 hso_serial_common_free(serial); 2325 2326 if (serial->shared_int) { 2327 mutex_lock(&serial->shared_int->shared_int_lock); 2328 if (--serial->shared_int->ref_count == 0) 2329 hso_free_shared_int(serial->shared_int); 2330 else 2331 mutex_unlock(&serial->shared_int->shared_int_lock); 2332 } 2333 kfree(serial); 2334 hso_free_device(hso_dev); 2335} 2336 2337/* Creates a bulk AT channel */ 2338static struct hso_device *hso_create_bulk_serial_device( 2339 struct usb_interface *interface, int port) 2340{ 2341 struct hso_device *hso_dev; 2342 struct hso_serial *serial; 2343 int num_urbs; 2344 2345 hso_dev = hso_create_device(interface, port); 2346 if (!hso_dev) 2347 return NULL; 2348 2349 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2350 if (!serial) 2351 goto exit; 2352 2353 serial->parent = hso_dev; 2354 hso_dev->port_data.dev_serial = serial; 2355 2356 if (port & HSO_PORT_MODEM) 2357 num_urbs = 2; 2358 else 2359 num_urbs = 1; 2360 2361 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2362 BULK_URB_TX_SIZE)) 2363 goto exit; 2364 2365 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2366 USB_DIR_IN); 2367 if (!serial->in_endp) { 2368 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2369 goto exit2; 2370 } 2371 2372 if (! 2373 (serial->out_endp = 2374 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2375 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2376 goto exit2; 2377 } 2378 2379 serial->write_data = hso_std_serial_write_data; 2380 2381 /* and record this serial */ 2382 set_serial_by_index(serial->minor, serial); 2383 2384 /* setup the proc dirs and files if needed */ 2385 hso_log_port(hso_dev); 2386 2387 /* done, return it */ 2388 return hso_dev; 2389 2390exit2: 2391 hso_serial_common_free(serial); 2392exit: 2393 kfree(serial); 2394 hso_free_device(hso_dev); 2395 return NULL; 2396} 2397 2398/* Creates a multiplexed AT channel */ 2399static 2400struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2401 int port, 2402 struct hso_shared_int *mux) 2403{ 2404 struct hso_device *hso_dev; 2405 struct hso_serial *serial; 2406 int port_spec; 2407 2408 port_spec = HSO_INTF_MUX; 2409 port_spec &= ~HSO_PORT_MASK; 2410 2411 port_spec |= hso_mux_to_port(port); 2412 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2413 return NULL; 2414 2415 hso_dev = hso_create_device(interface, port_spec); 2416 if (!hso_dev) 2417 return NULL; 2418 2419 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2420 if (!serial) 2421 goto exit; 2422 2423 hso_dev->port_data.dev_serial = serial; 2424 serial->parent = hso_dev; 2425 2426 if (hso_serial_common_create 2427 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2428 goto exit; 2429 2430 serial->tx_data_length--; 2431 serial->write_data = hso_mux_serial_write_data; 2432 2433 serial->shared_int = mux; 2434 mutex_lock(&serial->shared_int->shared_int_lock); 2435 serial->shared_int->ref_count++; 2436 mutex_unlock(&serial->shared_int->shared_int_lock); 2437 2438 /* and record this serial */ 2439 set_serial_by_index(serial->minor, serial); 2440 2441 /* setup the proc dirs and files if needed */ 2442 hso_log_port(hso_dev); 2443 2444 /* done, return it */ 2445 return hso_dev; 2446 2447exit: 2448 if (serial) { 2449 tty_unregister_device(tty_drv, serial->minor); 2450 kfree(serial); 2451 } 2452 if (hso_dev) 2453 hso_free_device(hso_dev); 2454 return NULL; 2455 2456} 2457 2458static void hso_free_shared_int(struct hso_shared_int *mux) 2459{ 2460 usb_free_urb(mux->shared_intr_urb); 2461 kfree(mux->shared_intr_buf); 2462 mutex_unlock(&mux->shared_int_lock); 2463 kfree(mux); 2464} 2465 2466static 2467struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2468{ 2469 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2470 2471 if (!mux) 2472 return NULL; 2473 2474 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2475 USB_DIR_IN); 2476 if (!mux->intr_endp) { 2477 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2478 goto exit; 2479 } 2480 2481 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2482 if (!mux->shared_intr_urb) { 2483 dev_err(&interface->dev, "Could not allocate intr urb?"); 2484 goto exit; 2485 } 2486 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize, 2487 GFP_KERNEL); 2488 if (!mux->shared_intr_buf) { 2489 dev_err(&interface->dev, "Could not allocate intr buf?"); 2490 goto exit; 2491 } 2492 2493 mutex_init(&mux->shared_int_lock); 2494 2495 return mux; 2496 2497exit: 2498 kfree(mux->shared_intr_buf); 2499 usb_free_urb(mux->shared_intr_urb); 2500 kfree(mux); 2501 return NULL; 2502} 2503 2504/* Gets the port spec for a certain interface */ 2505static int hso_get_config_data(struct usb_interface *interface) 2506{ 2507 struct usb_device *usbdev = interface_to_usbdev(interface); 2508 u8 config_data[17]; 2509 u32 if_num = interface->altsetting->desc.bInterfaceNumber; 2510 s32 result; 2511 2512 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2513 0x86, 0xC0, 0, 0, config_data, 17, 2514 USB_CTRL_SET_TIMEOUT) != 0x11) { 2515 return -EIO; 2516 } 2517 2518 switch (config_data[if_num]) { 2519 case 0x0: 2520 result = 0; 2521 break; 2522 case 0x1: 2523 result = HSO_PORT_DIAG; 2524 break; 2525 case 0x2: 2526 result = HSO_PORT_GPS; 2527 break; 2528 case 0x3: 2529 result = HSO_PORT_GPS_CONTROL; 2530 break; 2531 case 0x4: 2532 result = HSO_PORT_APP; 2533 break; 2534 case 0x5: 2535 result = HSO_PORT_APP2; 2536 break; 2537 case 0x6: 2538 result = HSO_PORT_CONTROL; 2539 break; 2540 case 0x7: 2541 result = HSO_PORT_NETWORK; 2542 break; 2543 case 0x8: 2544 result = HSO_PORT_MODEM; 2545 break; 2546 case 0x9: 2547 result = HSO_PORT_MSD; 2548 break; 2549 case 0xa: 2550 result = HSO_PORT_PCSC; 2551 break; 2552 case 0xb: 2553 result = HSO_PORT_VOICE; 2554 break; 2555 default: 2556 result = 0; 2557 } 2558 2559 if (result) 2560 result |= HSO_INTF_BULK; 2561 2562 if (config_data[16] & 0x1) 2563 result |= HSO_INFO_CRC_BUG; 2564 2565 return result; 2566} 2567 2568/* called once for each interface upon device insertion */ 2569static int hso_probe(struct usb_interface *interface, 2570 const struct usb_device_id *id) 2571{ 2572 int mux, i, if_num, port_spec; 2573 unsigned char port_mask; 2574 struct hso_device *hso_dev = NULL; 2575 struct hso_shared_int *shared_int; 2576 struct hso_device *tmp_dev = NULL; 2577 2578 if_num = interface->altsetting->desc.bInterfaceNumber; 2579 2580 /* Get the interface/port specification from either driver_info or from 2581 * the device itself */ 2582 if (id->driver_info) 2583 port_spec = ((u32 *)(id->driver_info))[if_num]; 2584 else 2585 port_spec = hso_get_config_data(interface); 2586 2587 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2588 dev_err(&interface->dev, "Not our interface\n"); 2589 return -ENODEV; 2590 } 2591 /* Check if we need to switch to alt interfaces prior to port 2592 * configuration */ 2593 if (interface->num_altsetting > 1) 2594 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2595 interface->needs_remote_wakeup = 1; 2596 2597 /* Allocate new hso device(s) */ 2598 switch (port_spec & HSO_INTF_MASK) { 2599 case HSO_INTF_MUX: 2600 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2601 /* Create the network device */ 2602 if (!disable_net) { 2603 hso_dev = hso_create_net_device(interface); 2604 if (!hso_dev) 2605 goto exit; 2606 tmp_dev = hso_dev; 2607 } 2608 } 2609 2610 if (hso_get_mux_ports(interface, &port_mask)) 2611 /* TODO: de-allocate everything */ 2612 goto exit; 2613 2614 shared_int = hso_create_shared_int(interface); 2615 if (!shared_int) 2616 goto exit; 2617 2618 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2619 if (port_mask & i) { 2620 hso_dev = hso_create_mux_serial_device( 2621 interface, i, shared_int); 2622 if (!hso_dev) 2623 goto exit; 2624 } 2625 } 2626 2627 if (tmp_dev) 2628 hso_dev = tmp_dev; 2629 break; 2630 2631 case HSO_INTF_BULK: 2632 /* It's a regular bulk interface */ 2633 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) 2634 && !disable_net) 2635 hso_dev = hso_create_net_device(interface); 2636 else 2637 hso_dev = 2638 hso_create_bulk_serial_device(interface, port_spec); 2639 if (!hso_dev) 2640 goto exit; 2641 break; 2642 default: 2643 goto exit; 2644 } 2645 2646 usb_driver_claim_interface(&hso_driver, interface, hso_dev); 2647 2648 /* save our data pointer in this device */ 2649 usb_set_intfdata(interface, hso_dev); 2650 2651 /* done */ 2652 return 0; 2653exit: 2654 hso_free_interface(interface); 2655 return -ENODEV; 2656} 2657 2658/* device removed, cleaning up */ 2659static void hso_disconnect(struct usb_interface *interface) 2660{ 2661 hso_free_interface(interface); 2662 2663 /* remove reference of our private data */ 2664 usb_set_intfdata(interface, NULL); 2665 2666 usb_driver_release_interface(&hso_driver, interface); 2667} 2668 2669static void async_get_intf(struct work_struct *data) 2670{ 2671 struct hso_device *hso_dev = 2672 container_of(data, struct hso_device, async_get_intf); 2673 usb_autopm_get_interface(hso_dev->interface); 2674} 2675 2676static void async_put_intf(struct work_struct *data) 2677{ 2678 struct hso_device *hso_dev = 2679 container_of(data, struct hso_device, async_put_intf); 2680 usb_autopm_put_interface(hso_dev->interface); 2681} 2682 2683static int hso_get_activity(struct hso_device *hso_dev) 2684{ 2685 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2686 if (!hso_dev->is_active) { 2687 hso_dev->is_active = 1; 2688 schedule_work(&hso_dev->async_get_intf); 2689 } 2690 } 2691 2692 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2693 return -EAGAIN; 2694 2695 usb_mark_last_busy(hso_dev->usb); 2696 2697 return 0; 2698} 2699 2700static int hso_put_activity(struct hso_device *hso_dev) 2701{ 2702 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 2703 if (hso_dev->is_active) { 2704 hso_dev->is_active = 0; 2705 schedule_work(&hso_dev->async_put_intf); 2706 return -EAGAIN; 2707 } 2708 } 2709 hso_dev->is_active = 0; 2710 return 0; 2711} 2712 2713/* called by kernel when we need to suspend device */ 2714static int hso_suspend(struct usb_interface *iface, pm_message_t message) 2715{ 2716 int i, result; 2717 2718 /* Stop all serial ports */ 2719 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 2720 if (serial_table[i] && (serial_table[i]->interface == iface)) { 2721 result = hso_stop_serial_device(serial_table[i]); 2722 if (result) 2723 goto out; 2724 } 2725 } 2726 2727 /* Stop all network ports */ 2728 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2729 if (network_table[i] && 2730 (network_table[i]->interface == iface)) { 2731 result = hso_stop_net_device(network_table[i]); 2732 if (result) 2733 goto out; 2734 } 2735 } 2736 2737out: 2738 return 0; 2739} 2740 2741/* called by kernel when we need to resume device */ 2742static int hso_resume(struct usb_interface *iface) 2743{ 2744 int i, result = 0; 2745 struct hso_net *hso_net; 2746 2747 /* Start all serial ports */ 2748 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 2749 if (serial_table[i] && (serial_table[i]->interface == iface)) { 2750 if (dev2ser(serial_table[i])->open_count) { 2751 result = 2752 hso_start_serial_device(serial_table[i], GFP_NOIO); 2753 hso_kick_transmit(dev2ser(serial_table[i])); 2754 if (result) 2755 goto out; 2756 } 2757 } 2758 } 2759 2760 /* Start all network ports */ 2761 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2762 if (network_table[i] && 2763 (network_table[i]->interface == iface)) { 2764 hso_net = dev2net(network_table[i]); 2765 if (hso_net->flags & IFF_UP) { 2766 /* First transmit any lingering data, 2767 then restart the device. */ 2768 if (hso_net->skb_tx_buf) { 2769 dev_dbg(&iface->dev, 2770 "Transmitting" 2771 " lingering data\n"); 2772 hso_net_start_xmit(hso_net->skb_tx_buf, 2773 hso_net->net); 2774 hso_net->skb_tx_buf = NULL; 2775 } 2776 result = hso_start_net_device(network_table[i]); 2777 if (result) 2778 goto out; 2779 } 2780 } 2781 } 2782 2783out: 2784 return result; 2785} 2786 2787static void hso_serial_ref_free(struct kref *ref) 2788{ 2789 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 2790 2791 hso_free_serial_device(hso_dev); 2792} 2793 2794static void hso_free_interface(struct usb_interface *interface) 2795{ 2796 struct hso_serial *hso_dev; 2797 int i; 2798 2799 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 2800 if (serial_table[i] 2801 && (serial_table[i]->interface == interface)) { 2802 hso_dev = dev2ser(serial_table[i]); 2803 if (hso_dev->tty) 2804 tty_hangup(hso_dev->tty); 2805 mutex_lock(&hso_dev->parent->mutex); 2806 hso_dev->parent->usb_gone = 1; 2807 mutex_unlock(&hso_dev->parent->mutex); 2808 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 2809 } 2810 } 2811 2812 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2813 if (network_table[i] 2814 && (network_table[i]->interface == interface)) { 2815 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 2816 /* hso_stop_net_device doesn't stop the net queue since 2817 * traffic needs to start it again when suspended */ 2818 netif_stop_queue(dev2net(network_table[i])->net); 2819 hso_stop_net_device(network_table[i]); 2820 cancel_work_sync(&network_table[i]->async_put_intf); 2821 cancel_work_sync(&network_table[i]->async_get_intf); 2822 if (rfk) 2823 rfkill_unregister(rfk); 2824 hso_free_net_device(network_table[i]); 2825 } 2826 } 2827} 2828 2829/* Helper functions */ 2830 2831/* Get the endpoint ! */ 2832static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 2833 int type, int dir) 2834{ 2835 int i; 2836 struct usb_host_interface *iface = intf->cur_altsetting; 2837 struct usb_endpoint_descriptor *endp; 2838 2839 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 2840 endp = &iface->endpoint[i].desc; 2841 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 2842 ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type)) 2843 return endp; 2844 } 2845 2846 return NULL; 2847} 2848 2849/* Get the byte that describes which ports are enabled */ 2850static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 2851{ 2852 int i; 2853 struct usb_host_interface *iface = intf->cur_altsetting; 2854 2855 if (iface->extralen == 3) { 2856 *ports = iface->extra[2]; 2857 return 0; 2858 } 2859 2860 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 2861 if (iface->endpoint[i].extralen == 3) { 2862 *ports = iface->endpoint[i].extra[2]; 2863 return 0; 2864 } 2865 } 2866 2867 return -1; 2868} 2869 2870/* interrupt urb needs to be submitted, used for serial read of muxed port */ 2871static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 2872 struct usb_device *usb, gfp_t gfp) 2873{ 2874 int result; 2875 2876 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 2877 usb_rcvintpipe(usb, 2878 shared_int->intr_endp->bEndpointAddress & 0x7F), 2879 shared_int->shared_intr_buf, 2880 shared_int->intr_endp->wMaxPacketSize, 2881 intr_callback, shared_int, 2882 shared_int->intr_endp->bInterval); 2883 2884 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 2885 if (result) 2886 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__, 2887 result); 2888 2889 return result; 2890} 2891 2892/* operations setup of the serial interface */ 2893static const struct tty_operations hso_serial_ops = { 2894 .open = hso_serial_open, 2895 .close = hso_serial_close, 2896 .write = hso_serial_write, 2897 .write_room = hso_serial_write_room, 2898 .set_termios = hso_serial_set_termios, 2899 .chars_in_buffer = hso_serial_chars_in_buffer, 2900 .tiocmget = hso_serial_tiocmget, 2901 .tiocmset = hso_serial_tiocmset, 2902 .unthrottle = hso_unthrottle 2903}; 2904 2905static struct usb_driver hso_driver = { 2906 .name = driver_name, 2907 .probe = hso_probe, 2908 .disconnect = hso_disconnect, 2909 .id_table = hso_ids, 2910 .suspend = hso_suspend, 2911 .resume = hso_resume, 2912 .reset_resume = hso_resume, 2913 .supports_autosuspend = 1, 2914}; 2915 2916static int __init hso_init(void) 2917{ 2918 int i; 2919 int result; 2920 2921 /* put it in the log */ 2922 printk(KERN_INFO "hso: %s\n", version); 2923 2924 /* Initialise the serial table semaphore and table */ 2925 spin_lock_init(&serial_table_lock); 2926 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 2927 serial_table[i] = NULL; 2928 2929 /* allocate our driver using the proper amount of supported minors */ 2930 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 2931 if (!tty_drv) 2932 return -ENOMEM; 2933 2934 /* fill in all needed values */ 2935 tty_drv->magic = TTY_DRIVER_MAGIC; 2936 tty_drv->owner = THIS_MODULE; 2937 tty_drv->driver_name = driver_name; 2938 tty_drv->name = tty_filename; 2939 2940 /* if major number is provided as parameter, use that one */ 2941 if (tty_major) 2942 tty_drv->major = tty_major; 2943 2944 tty_drv->minor_start = 0; 2945 tty_drv->num = HSO_SERIAL_TTY_MINORS; 2946 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 2947 tty_drv->subtype = SERIAL_TYPE_NORMAL; 2948 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 2949 tty_drv->init_termios = tty_std_termios; 2950 tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; 2951 tty_drv->termios = hso_serial_termios; 2952 tty_drv->termios_locked = hso_serial_termios_locked; 2953 tty_set_operations(tty_drv, &hso_serial_ops); 2954 2955 /* register the tty driver */ 2956 result = tty_register_driver(tty_drv); 2957 if (result) { 2958 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", 2959 __func__, result); 2960 return result; 2961 } 2962 2963 /* register this module as an usb driver */ 2964 result = usb_register(&hso_driver); 2965 if (result) { 2966 printk(KERN_ERR "Could not register hso driver? error: %d\n", 2967 result); 2968 /* cleanup serial interface */ 2969 tty_unregister_driver(tty_drv); 2970 return result; 2971 } 2972 2973 /* done */ 2974 return 0; 2975} 2976 2977static void __exit hso_exit(void) 2978{ 2979 printk(KERN_INFO "hso: unloaded\n"); 2980 2981 tty_unregister_driver(tty_drv); 2982 /* deregister the usb driver */ 2983 usb_deregister(&hso_driver); 2984} 2985 2986/* Module definitions */ 2987module_init(hso_init); 2988module_exit(hso_exit); 2989 2990MODULE_AUTHOR(MOD_AUTHOR); 2991MODULE_DESCRIPTION(MOD_DESCRIPTION); 2992MODULE_LICENSE(MOD_LICENSE); 2993MODULE_INFO(Version, DRIVER_VERSION); 2994 2995/* change the debug level (eg: insmod hso.ko debug=0x04) */ 2996MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 2997module_param(debug, int, S_IRUGO | S_IWUSR); 2998 2999/* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3000MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3001module_param(tty_major, int, S_IRUGO | S_IWUSR); 3002 3003/* disable network interface (eg: insmod hso.ko disable_net=1) */ 3004MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3005module_param(disable_net, int, S_IRUGO | S_IWUSR); 3006