drivers/usb/serial/option.c.2.6.15

   1 /*
   2   Option Card (PCMCIA to) USB to Serial Driver
   3
   4   Copyright (C) 2005  Matthias Urlichs <smurf@smurf.noris.de>
   5
   6   This driver is free software; you can redistribute it and/or modify
   7   it under the terms of Version 2 of the GNU General Public License as
   8   published by the Free Software Foundation.
   9
  10   Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
  11
  12   History:
  13
  14   2005-05-19  v0.1   Initial version, based on incomplete docs
  15                      and analysis of misbehavior with the standard driver
  16   2005-05-20  v0.2   Extended the input buffer to avoid losing
  17                      random 64-byte chunks of data
  18   2005-05-21  v0.3   implemented chars_in_buffer()
  19                      turned on low_latency
  20                      simplified the code somewhat
  21   2005-05-24  v0.4   option_write() sometimes deadlocked under heavy load
  22                      removed some dead code
  23                      added sponsor notice
  24                      coding style clean-up
  25   2005-06-20  v0.4.1 add missing braces :-/
  26                      killed end-of-line whitespace
  27   2005-07-15  v0.4.2 rename WLAN product to FUSION, add FUSION2
  28   2005-09-10  v0.4.3 added HUAWEI E600 card and Audiovox AirCard
  29   2005-09-20  v0.4.4 increased recv buffer size: the card sometimes
  30                      wants to send >2000 bytes.
  31
  32   Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
  33
  34 */
  35
  36 #define DRIVER_VERSION "v0.4"
  37 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
  38 #define DRIVER_DESC "Option Card (PC-Card to) USB to Serial Driver"
  39
  40 #include <linux/config.h>
  41 #include <linux/kernel.h>
  42 #include <linux/jiffies.h>
  43 #include <linux/errno.h>
  44 #include <linux/tty.h>
  45 #include <linux/tty_flip.h>
  46 #include <linux/module.h>
  47 #include <linux/usb.h>
  48 #include "usb-serial.h"
  49
  50 /* Function prototypes */
  51 static int  option_open(struct usb_serial_port *port, struct file *filp);
  52 static void option_close(struct usb_serial_port *port, struct file *filp);
  53 static int  option_startup(struct usb_serial *serial);
  54 static void option_shutdown(struct usb_serial *serial);
  55 static void option_rx_throttle(struct usb_serial_port *port);
  56 static void option_rx_unthrottle(struct usb_serial_port *port);
  57 static int  option_write_room(struct usb_serial_port *port);
  58
  59 static void option_instat_callback(struct urb *urb, struct pt_regs *regs);
  60
  61 static int option_write(struct usb_serial_port *port,
  62                         const unsigned char *buf, int count);
  63
  64 static int  option_chars_in_buffer(struct usb_serial_port *port);
  65 static int  option_ioctl(struct usb_serial_port *port, struct file *file,
  66                         unsigned int cmd, unsigned long arg);
  67 static void option_set_termios(struct usb_serial_port *port,
  68                                 struct termios *old);
  69 static void option_break_ctl(struct usb_serial_port *port, int break_state);
  70 static int  option_tiocmget(struct usb_serial_port *port, struct file *file);
  71 static int  option_tiocmset(struct usb_serial_port *port, struct file *file,
  72                                 unsigned int set, unsigned int clear);
  73 static int  option_send_setup(struct usb_serial_port *port);
  74
  75 /* Vendor and product IDs */
  76 #define OPTION_VENDOR_ID                        0x0AF0
  77 #define HUAWEI_VENDOR_ID                        0x12D1
  78 #define AUDIOVOX_VENDOR_ID                      0x0F3D
  79
  80 #define OPTION_PRODUCT_OLD              0x5000
  81 #define OPTION_PRODUCT_FUSION   0x6000
  82 #define OPTION_PRODUCT_FUSION2  0x6300
  83 #define HUAWEI_PRODUCT_E600     0x1001
  84 #define AUDIOVOX_PRODUCT_AIRCARD 0x0112
  85
  86 static struct usb_device_id option_ids[] = {
  87         { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_OLD) },
  88         { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION) },
  89         { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION2) },
  90         { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
  91         { USB_DEVICE(AUDIOVOX_VENDOR_ID, AUDIOVOX_PRODUCT_AIRCARD) },
  92         { } /* Terminating entry */
  93 };
  94
  95 MODULE_DEVICE_TABLE(usb, option_ids);
  96
  97 static struct usb_driver option_driver = {
  98         .owner      = THIS_MODULE,
  99         .name       = "option",
 100         .probe      = usb_serial_probe,
 101         .disconnect = usb_serial_disconnect,
 102         .id_table   = option_ids,
 103 };
 104
 105 /* The card has three separate interfaces, wich the serial driver
 106  * recognizes separately, thus num_port=1.
 107  */
 108 static struct usb_serial_device_type option_3port_device = {
 109         //.driver = {
 110                 .owner =        THIS_MODULE,
 111         //      .name =         "option",
 112         //},
 113         .name              = "Option 3G data card",
 114         .short_name        = "option",
 115         //.description       = "Option 3G data card",
 116         .id_table          = option_ids,
 117         .num_interrupt_in  = NUM_DONT_CARE,
 118         .num_bulk_in       = NUM_DONT_CARE,
 119         .num_bulk_out      = NUM_DONT_CARE,
 120         .num_ports         = 1, /* 3, but the card reports its ports separately */
 121         .open              = option_open,
 122         .close             = option_close,
 123         .write             = option_write,
 124         .write_room        = option_write_room,
 125         .chars_in_buffer   = option_chars_in_buffer,
 126         .throttle          = option_rx_throttle,
 127         .unthrottle        = option_rx_unthrottle,
 128         .ioctl             = option_ioctl,
 129         .set_termios       = option_set_termios,
 130         .break_ctl         = option_break_ctl,
 131         .tiocmget          = option_tiocmget,
 132         .tiocmset          = option_tiocmset,
 133         .attach            = option_startup,
 134         .shutdown          = option_shutdown,
 135         .read_int_callback = option_instat_callback,
 136 };
 137
 138 #ifdef CONFIG_USB_DEBUG
 139 static int debug;
 140 #else
 141 #define debug 0
 142 #endif
 143
 144 /* per port private data */
 145
 146 #define N_IN_URB 4
 147 #define N_OUT_URB 1
 148 #define IN_BUFLEN 4096
 149 #define OUT_BUFLEN 128
 150
 151 struct option_port_private {
 152         /* Input endpoints and buffer for this port */
 153         struct urb *in_urbs[N_IN_URB];
 154         char in_buffer[N_IN_URB][IN_BUFLEN];
 155         /* Output endpoints and buffer for this port */
 156         struct urb *out_urbs[N_OUT_URB];
 157         char out_buffer[N_OUT_URB][OUT_BUFLEN];
 158
 159         /* Settings for the port */
 160         int rts_state;  /* Handshaking pins (outputs) */
 161         int dtr_state;
 162         int cts_state;  /* Handshaking pins (inputs) */
 163         int dsr_state;
 164         int dcd_state;
 165         int ri_state;
 166
 167         unsigned long tx_start_time[N_OUT_URB];
 168 };
 169
 170 /* Functions used by new usb-serial code. */
 171 static int __init option_init(void)
 172 {
 173         int retval;
 174         retval = usb_serial_register(&option_3port_device);
 175         if (retval)
 176                 goto failed_3port_device_register;
 177         retval = usb_register(&option_driver);
 178         if (retval)
 179                 goto failed_driver_register;
 180
 181         info(DRIVER_DESC ": " DRIVER_VERSION);
 182
 183         return 0;
 184
 185 failed_driver_register:
 186         usb_serial_deregister (&option_3port_device);
 187 failed_3port_device_register:
 188         return retval;
 189 }
 190
 191 static void __exit option_exit(void)
 192 {
 193         usb_deregister (&option_driver);
 194         usb_serial_deregister (&option_3port_device);
 195 }
 196
 197 module_init(option_init);
 198 module_exit(option_exit);
 199
 200 static void option_rx_throttle(struct usb_serial_port *port)
 201 {
 202         dbg("%s", __FUNCTION__);
 203 }
 204
 205 static void option_rx_unthrottle(struct usb_serial_port *port)
 206 {
 207         dbg("%s", __FUNCTION__);
 208 }
 209
 210 static void option_break_ctl(struct usb_serial_port *port, int break_state)
 211 {
 212         /* Unfortunately, I don't know how to send a break */
 213         dbg("%s", __FUNCTION__);
 214 }
 215
 216 static void option_set_termios(struct usb_serial_port *port,
 217                         struct termios *old_termios)
 218 {
 219         dbg("%s", __FUNCTION__);
 220
 221         option_send_setup(port);
 222 }
 223
 224 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
 225 {
 226         unsigned int value;
 227         struct option_port_private *portdata;
 228
 229         portdata = usb_get_serial_port_data(port);
 230
 231         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 232                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 233                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 234                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 235                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 236                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 237
 238         return value;
 239 }
 240
 241 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
 242                         unsigned int set, unsigned int clear)
 243 {
 244         struct option_port_private *portdata;
 245
 246         portdata = usb_get_serial_port_data(port);
 247
 248         if (set & TIOCM_RTS)
 249                 portdata->rts_state = 1;
 250         if (set & TIOCM_DTR)
 251                 portdata->dtr_state = 1;
 252
 253         if (clear & TIOCM_RTS)
 254                 portdata->rts_state = 0;
 255         if (clear & TIOCM_DTR)
 256                 portdata->dtr_state = 0;
 257         return option_send_setup(port);
 258 }
 259
 260 static int option_ioctl(struct usb_serial_port *port, struct file *file,
 261                         unsigned int cmd, unsigned long arg)
 262 {
 263         return -ENOIOCTLCMD;
 264 }
 265
 266 /* Write */
 267 static int option_write(struct usb_serial_port *port,
 268                         const unsigned char *buf, int count)
 269 {
 270         struct option_port_private *portdata;
 271         int i;
 272         int left, todo;
 273         struct urb *this_urb = NULL; /* spurious */
 274         int err;
 275
 276         portdata = usb_get_serial_port_data(port);
 277
 278         dbg("%s: write (%d chars)", __FUNCTION__, count);
 279
 280         i = 0;
 281         left = count;
 282         for (i=0; left > 0 && i < N_OUT_URB; i++) {
 283                 todo = left;
 284                 if (todo > OUT_BUFLEN)
 285                         todo = OUT_BUFLEN;
 286
 287                 this_urb = portdata->out_urbs[i];
 288                 if (this_urb->status == -EINPROGRESS) {
 289                         if (time_before(jiffies,
 290                                         portdata->tx_start_time[i] + 10 * HZ))
 291                                 continue;
 292                         usb_unlink_urb(this_urb);
 293                         continue;
 294                 }
 295                 if (this_urb->status != 0)
 296                         dbg("usb_write %p failed (err=%d)",
 297                                 this_urb, this_urb->status);
 298
 299                 dbg("%s: endpoint %d buf %d", __FUNCTION__,
 300                         usb_pipeendpoint(this_urb->pipe), i);
 301
 302                 /* send the data */
 303                 memcpy (this_urb->transfer_buffer, buf, todo);
 304                 this_urb->transfer_buffer_length = todo;
 305
 306                 this_urb->dev = port->serial->dev;
 307                 err = usb_submit_urb(this_urb, GFP_ATOMIC);
 308                 if (err) {
 309                         dbg("usb_submit_urb %p (write bulk) failed "
 310                                 "(%d, has %d)", this_urb,
 311                                 err, this_urb->status);
 312                         continue;
 313                 }
 314                 portdata->tx_start_time[i] = jiffies;
 315                 buf += todo;
 316                 left -= todo;
 317         }
 318
 319         count -= left;
 320         dbg("%s: wrote (did %d)", __FUNCTION__, count);
 321         return count;
 322 }
 323
 324 static void option_indat_callback(struct urb *urb, struct pt_regs *regs)
 325 {
 326         int i, err;
 327         int endpoint;
 328         struct usb_serial_port *port;
 329         struct tty_struct *tty;
 330         unsigned char *data = urb->transfer_buffer;
 331
 332         dbg("%s: %p", __FUNCTION__, urb);
 333
 334         endpoint = usb_pipeendpoint(urb->pipe);
 335         port = (struct usb_serial_port *) urb->context;
 336
 337         if (urb->status) {
 338                 dbg("%s: nonzero status: %d on endpoint %02x.",
 339                     __FUNCTION__, urb->status, endpoint);
 340         } else {
 341                 tty = port->tty;
 342                 if (urb->actual_length) {
 343                         for (i = 0; i < urb->actual_length ; ++i) {
 344                                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
 345                                         tty_flip_buffer_push(tty);
 346                                 tty_insert_flip_char(tty, data[i], 0);
 347                         }
 348                         tty_flip_buffer_push(tty);
 349                 } else {
 350                         dbg("%s: empty read urb received", __FUNCTION__);
 351                 }
 352
 353                 /* Resubmit urb so we continue receiving */
 354                 if (port->open_count && urb->status != -ESHUTDOWN) {
 355                         err = usb_submit_urb(urb, GFP_ATOMIC);
 356                         if (err)
 357                                 printk(KERN_ERR "%s: resubmit read urb failed. "
 358                                         "(%d)", __FUNCTION__, err);
 359                 }
 360         }
 361         return;
 362 }
 363
 364 static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
 365 {
 366         struct usb_serial_port *port;
 367
 368         dbg("%s", __FUNCTION__);
 369
 370         port = (struct usb_serial_port *) urb->context;
 371
 372         if (port->open_count)
 373                 schedule_work(&port->work);
 374 }
 375
 376 static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
 377 {
 378         int err;
 379         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
 380         struct option_port_private *portdata = usb_get_serial_port_data(port);
 381         struct usb_serial *serial = port->serial;
 382
 383         dbg("%s", __FUNCTION__);
 384         dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
 385
 386         if (urb->status == 0) {
 387                 struct usb_ctrlrequest *req_pkt =
 388                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 389
 390                 if (!req_pkt) {
 391                         dbg("%s: NULL req_pkt\n", __FUNCTION__);
 392                         return;
 393                 }
 394                 if ((req_pkt->bRequestType == 0xA1) &&
 395                                 (req_pkt->bRequest == 0x20)) {
 396                         int old_dcd_state;
 397                         unsigned char signals = *((unsigned char *)
 398                                         urb->transfer_buffer +
 399                                         sizeof(struct usb_ctrlrequest));
 400
 401                         dbg("%s: signal x%x", __FUNCTION__, signals);
 402
 403                         old_dcd_state = portdata->dcd_state;
 404                         portdata->cts_state = 1;
 405                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 406                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 407                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 408
 409                         if (port->tty && !C_CLOCAL(port->tty) &&
 410                                         old_dcd_state && !portdata->dcd_state)
 411                                 tty_hangup(port->tty);
 412                 } else {
 413                         dbg("%s: type %x req %x", __FUNCTION__,
 414                                 req_pkt->bRequestType,req_pkt->bRequest);
 415                 }
 416         } else
 417                 dbg("%s: error %d", __FUNCTION__, urb->status);
 418
 419         /* Resubmit urb so we continue receiving IRQ data */
 420         if (urb->status != -ESHUTDOWN) {
 421                 urb->dev = serial->dev;
 422                 err = usb_submit_urb(urb, GFP_ATOMIC);
 423                 if (err)
 424                         dbg("%s: resubmit intr urb failed. (%d)",
 425                                 __FUNCTION__, err);
 426         }
 427 }
 428
 429 static int option_write_room(struct usb_serial_port *port)
 430 {
 431         struct option_port_private *portdata;
 432         int i;
 433         int data_len = 0;
 434         struct urb *this_urb;
 435
 436         portdata = usb_get_serial_port_data(port);
 437
 438         for (i=0; i < N_OUT_URB; i++) {
 439                 this_urb = portdata->out_urbs[i];
 440                 if (this_urb && this_urb->status != -EINPROGRESS)
 441                         data_len += OUT_BUFLEN;
 442         }
 443
 444         dbg("%s: %d", __FUNCTION__, data_len);
 445         return data_len;
 446 }
 447
 448 static int option_chars_in_buffer(struct usb_serial_port *port)
 449 {
 450         struct option_port_private *portdata;
 451         int i;
 452         int data_len = 0;
 453         struct urb *this_urb;
 454
 455         portdata = usb_get_serial_port_data(port);
 456
 457         for (i=0; i < N_OUT_URB; i++) {
 458                 this_urb = portdata->out_urbs[i];
 459                 if (this_urb && this_urb->status == -EINPROGRESS)
 460                         data_len += this_urb->transfer_buffer_length;
 461         }
 462         dbg("%s: %d", __FUNCTION__, data_len);
 463         return data_len;
 464 }
 465
 466 static int option_open(struct usb_serial_port *port, struct file *filp)
 467 {
 468         struct option_port_private *portdata;
 469         struct usb_serial *serial = port->serial;
 470         int i, err;
 471         struct urb *urb;
 472
 473         portdata = usb_get_serial_port_data(port);
 474
 475         dbg("%s", __FUNCTION__);
 476
 477         /* Set some sane defaults */
 478         portdata->rts_state = 1;
 479         portdata->dtr_state = 1;
 480
 481         /* Reset low level data toggle and start reading from endpoints */
 482         for (i = 0; i < N_IN_URB; i++) {
 483                 urb = portdata->in_urbs[i];
 484                 if (! urb)
 485                         continue;
 486                 if (urb->dev != serial->dev) {
 487                         dbg("%s: dev %p != %p", __FUNCTION__,
 488                                 urb->dev, serial->dev);
 489                         continue;
 490                 }
 491
 492                 /*
 493                  * make sure endpoint data toggle is synchronized with the
 494                  * device
 495                  */
 496                 usb_clear_halt(urb->dev, urb->pipe);
 497
 498                 err = usb_submit_urb(urb, GFP_KERNEL);
 499                 if (err) {
 500                         dbg("%s: submit urb %d failed (%d) %d",
 501                                 __FUNCTION__, i, err,
 502                                 urb->transfer_buffer_length);
 503                 }
 504         }
 505
 506         /* Reset low level data toggle on out endpoints */
 507         for (i = 0; i < N_OUT_URB; i++) {
 508                 urb = portdata->out_urbs[i];
 509                 if (! urb)
 510                         continue;
 511                 urb->dev = serial->dev;
 512                 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
 513                                 usb_pipeout(urb->pipe), 0); */
 514         }
 515
 516         port->tty->low_latency = 1;
 517
 518         option_send_setup(port);
 519
 520         return (0);
 521 }
 522
 523 static inline void stop_urb(struct urb *urb)
 524 {
 525         if (urb && urb->status == -EINPROGRESS)
 526                 usb_kill_urb(urb);
 527 }
 528
 529 static void option_close(struct usb_serial_port *port, struct file *filp)
 530 {
 531         int i;
 532         struct usb_serial *serial = port->serial;
 533         struct option_port_private *portdata;
 534
 535         dbg("%s", __FUNCTION__);
 536         portdata = usb_get_serial_port_data(port);
 537
 538         portdata->rts_state = 0;
 539         portdata->dtr_state = 0;
 540
 541         if (serial->dev) {
 542                 option_send_setup(port);
 543
 544                 /* Stop reading/writing urbs */
 545                 for (i = 0; i < N_IN_URB; i++)
 546                         stop_urb(portdata->in_urbs[i]);
 547                 for (i = 0; i < N_OUT_URB; i++)
 548                         stop_urb(portdata->out_urbs[i]);
 549         }
 550         port->tty = NULL;
 551 }
 552
 553 /* Helper functions used by option_setup_urbs */
 554 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
 555                 int dir, void *ctx, char *buf, int len,
 556                 void (*callback)(struct urb *, struct pt_regs *regs))
 557 {
 558         struct urb *urb;
 559
 560         if (endpoint == -1)
 561                 return NULL;            /* endpoint not needed */
 562
 563         urb = usb_alloc_urb(0, GFP_KERNEL);             /* No ISO */
 564         if (urb == NULL) {
 565                 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
 566                 return NULL;
 567         }
 568
 569                 /* Fill URB using supplied data. */
 570         usb_fill_bulk_urb(urb, serial->dev,
 571                       usb_sndbulkpipe(serial->dev, endpoint) | dir,
 572                       buf, len, callback, ctx);
 573
 574         return urb;
 575 }
 576
 577 /* Setup urbs */
 578 static void option_setup_urbs(struct usb_serial *serial)
 579 {
 580         int j;
 581         struct usb_serial_port *port;
 582         struct option_port_private *portdata;
 583
 584         dbg("%s", __FUNCTION__);
 585
 586         port = serial->port[0];
 587         portdata = usb_get_serial_port_data(port);
 588
 589         /* Do indat endpoints first */
 590         for (j = 0; j <= N_IN_URB; ++j) {
 591                 portdata->in_urbs[j] = option_setup_urb (serial,
 592                   port->bulk_in_endpointAddress, USB_DIR_IN, port,
 593                   portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
 594         }
 595
 596         /* outdat endpoints */
 597         for (j = 0; j <= N_OUT_URB; ++j) {
 598                 portdata->out_urbs[j] = option_setup_urb (serial,
 599                   port->bulk_out_endpointAddress, USB_DIR_OUT, port,
 600                   portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
 601         }
 602 }
 603
 604 static int option_send_setup(struct usb_serial_port *port)
 605 {
 606         struct usb_serial *serial = port->serial;
 607         struct option_port_private *portdata;
 608
 609         dbg("%s", __FUNCTION__);
 610
 611         portdata = usb_get_serial_port_data(port);
 612
 613         if (port->tty) {
 614                 int val = 0;
 615                 if (portdata->dtr_state)
 616                         val |= 0x01;
 617                 if (portdata->rts_state)
 618                         val |= 0x02;
 619
 620                 return usb_control_msg(serial->dev,
 621                                 usb_rcvctrlpipe(serial->dev, 0),
 622                                 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
 623         }
 624
 625         return 0;
 626 }
 627
 628 static int option_startup(struct usb_serial *serial)
 629 {
 630         int i, err;
 631         struct usb_serial_port *port;
 632         struct option_port_private *portdata;
 633
 634         dbg("%s", __FUNCTION__);
 635
 636         /* Now setup per port private data */
 637         for (i = 0; i < serial->num_ports; i++) {
 638                 port = serial->port[i];
 639                 portdata = kmalloc(sizeof(*portdata), GFP_KERNEL);
 640                 if (!portdata) {
 641                         dbg("%s: kmalloc for option_port_private (%d) failed!.",
 642                                         __FUNCTION__, i);
 643                         return (1);
 644                 }
 645                 memset(portdata, 0, sizeof(struct option_port_private));
 646
 647                 usb_set_serial_port_data(port, portdata);
 648
 649                 if (! port->interrupt_in_urb)
 650                         continue;
 651                 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 652                 if (err)
 653                         dbg("%s: submit irq_in urb failed %d",
 654                                 __FUNCTION__, err);
 655         }
 656
 657         option_setup_urbs(serial);
 658
 659         return (0);
 660 }
 661
 662 static void option_shutdown(struct usb_serial *serial)
 663 {
 664         int i, j;
 665         struct usb_serial_port *port;
 666         struct option_port_private *portdata;
 667
 668         dbg("%s", __FUNCTION__);
 669
 670         /* Stop reading/writing urbs */
 671         for (i = 0; i < serial->num_ports; ++i) {
 672                 port = serial->port[i];
 673                 portdata = usb_get_serial_port_data(port);
 674                 for (j = 0; j < N_IN_URB; j++)
 675                         stop_urb(portdata->in_urbs[j]);
 676                 for (j = 0; j < N_OUT_URB; j++)
 677                         stop_urb(portdata->out_urbs[j]);
 678         }
 679
 680         /* Now free them */
 681         for (i = 0; i < serial->num_ports; ++i) {
 682                 port = serial->port[i];
 683                 portdata = usb_get_serial_port_data(port);
 684
 685                 for (j = 0; j < N_IN_URB; j++) {
 686                         if (portdata->in_urbs[j]) {
 687                                 usb_free_urb(portdata->in_urbs[j]);
 688                                 portdata->in_urbs[j] = NULL;
 689                         }
 690                 }
 691                 for (j = 0; j < N_OUT_URB; j++) {
 692                         if (portdata->out_urbs[j]) {
 693                                 usb_free_urb(portdata->out_urbs[j]);
 694                                 portdata->out_urbs[j] = NULL;
 695                         }
 696                 }
 697         }
 698
 699         /* Now free per port private data */
 700         for (i = 0; i < serial->num_ports; i++) {
 701                 port = serial->port[i];
 702                 kfree(usb_get_serial_port_data(port));
 703         }
 704 }
 705
 706 MODULE_AUTHOR(DRIVER_AUTHOR);
 707 MODULE_DESCRIPTION(DRIVER_DESC);
 708 MODULE_VERSION(DRIVER_VERSION);
 709 MODULE_LICENSE("GPL");
 710
 711 #ifdef CONFIG_USB_DEBUG
 712 module_param(debug, bool, S_IRUGO | S_IWUSR);
 713 MODULE_PARM_DESC(debug, "Debug messages");
 714 #endif
 715