drivers/usb/serial/option.c

   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         .owner             = THIS_MODULE,
 110         .name              = "Option 3G data card",
 111         .short_name        = "option",
 112         .id_table          = option_ids,
 113         .num_interrupt_in  = NUM_DONT_CARE,
 114         .num_bulk_in       = NUM_DONT_CARE,
 115         .num_bulk_out      = NUM_DONT_CARE,
 116         .num_ports         = 1, /* 3, but the card reports its ports separately */
 117         .open              = option_open,
 118         .close             = option_close,
 119         .write             = option_write,
 120         .write_room        = option_write_room,
 121         .chars_in_buffer   = option_chars_in_buffer,
 122         .throttle          = option_rx_throttle,
 123         .unthrottle        = option_rx_unthrottle,
 124         .ioctl             = option_ioctl,
 125         .set_termios       = option_set_termios,
 126         .break_ctl         = option_break_ctl,
 127         .tiocmget          = option_tiocmget,
 128         .tiocmset          = option_tiocmset,
 129         .attach            = option_startup,
 130         .shutdown          = option_shutdown,
 131         .read_int_callback = option_instat_callback,
 132 };
 133
 134 #ifdef CONFIG_USB_DEBUG
 135 static int debug;
 136 #else
 137 #define debug 0
 138 #endif
 139
 140 /* per port private data */
 141
 142 #define N_IN_URB 4
 143 #define N_OUT_URB 1
 144 #define IN_BUFLEN 4096
 145 #define OUT_BUFLEN 128
 146
 147 struct option_port_private {
 148         /* Input endpoints and buffer for this port */
 149         struct urb *in_urbs[N_IN_URB];
 150         char in_buffer[N_IN_URB][IN_BUFLEN];
 151         /* Output endpoints and buffer for this port */
 152         struct urb *out_urbs[N_OUT_URB];
 153         char out_buffer[N_OUT_URB][OUT_BUFLEN];
 154
 155         /* Settings for the port */
 156         int rts_state;  /* Handshaking pins (outputs) */
 157         int dtr_state;
 158         int cts_state;  /* Handshaking pins (inputs) */
 159         int dsr_state;
 160         int dcd_state;
 161         int ri_state;
 162
 163         unsigned long tx_start_time[N_OUT_URB];
 164 };
 165
 166 /* Functions used by new usb-serial code. */
 167 static int __init option_init(void)
 168 {
 169         int retval;
 170         retval = usb_serial_register(&option_3port_device);
 171         if (retval)
 172                 goto failed_3port_device_register;
 173         retval = usb_register(&option_driver);
 174         if (retval)
 175                 goto failed_driver_register;
 176
 177         info(DRIVER_DESC ": " DRIVER_VERSION);
 178
 179         return 0;
 180
 181 failed_driver_register:
 182         usb_serial_deregister (&option_3port_device);
 183 failed_3port_device_register:
 184         return retval;
 185 }
 186
 187 static void __exit option_exit(void)
 188 {
 189         usb_deregister (&option_driver);
 190         usb_serial_deregister (&option_3port_device);
 191 }
 192
 193 module_init(option_init);
 194 module_exit(option_exit);
 195
 196 static void option_rx_throttle(struct usb_serial_port *port)
 197 {
 198         dbg("%s", __FUNCTION__);
 199 }
 200
 201 static void option_rx_unthrottle(struct usb_serial_port *port)
 202 {
 203         dbg("%s", __FUNCTION__);
 204 }
 205
 206 static void option_break_ctl(struct usb_serial_port *port, int break_state)
 207 {
 208         /* Unfortunately, I don't know how to send a break */
 209         dbg("%s", __FUNCTION__);
 210 }
 211
 212 static void option_set_termios(struct usb_serial_port *port,
 213                         struct termios *old_termios)
 214 {
 215         dbg("%s", __FUNCTION__);
 216
 217         option_send_setup(port);
 218 }
 219
 220 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
 221 {
 222         unsigned int value;
 223         struct option_port_private *portdata;
 224
 225         portdata = usb_get_serial_port_data(port);
 226
 227         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 228                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 229                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 230                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 231                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 232                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 233
 234         return value;
 235 }
 236
 237 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
 238                         unsigned int set, unsigned int clear)
 239 {
 240         struct option_port_private *portdata;
 241
 242         portdata = usb_get_serial_port_data(port);
 243
 244         if (set & TIOCM_RTS)
 245                 portdata->rts_state = 1;
 246         if (set & TIOCM_DTR)
 247                 portdata->dtr_state = 1;
 248
 249         if (clear & TIOCM_RTS)
 250                 portdata->rts_state = 0;
 251         if (clear & TIOCM_DTR)
 252                 portdata->dtr_state = 0;
 253         return option_send_setup(port);
 254 }
 255
 256 static int option_ioctl(struct usb_serial_port *port, struct file *file,
 257                         unsigned int cmd, unsigned long arg)
 258 {
 259         return -ENOIOCTLCMD;
 260 }
 261
 262 /* Write */
 263 static int option_write(struct usb_serial_port *port,
 264                         const unsigned char *buf, int count)
 265 {
 266         struct option_port_private *portdata;
 267         int i;
 268         int left, todo;
 269         struct urb *this_urb = NULL; /* spurious */
 270         int err;
 271
 272         portdata = usb_get_serial_port_data(port);
 273
 274         dbg("%s: write (%d chars)", __FUNCTION__, count);
 275
 276         i = 0;
 277         left = count;
 278         for (i=0; left > 0 && i < N_OUT_URB; i++) {
 279                 todo = left;
 280                 if (todo > OUT_BUFLEN)
 281                         todo = OUT_BUFLEN;
 282
 283                 this_urb = portdata->out_urbs[i];
 284                 if (this_urb->status == -EINPROGRESS) {
 285                         if (time_before(jiffies,
 286                                         portdata->tx_start_time[i] + 10 * HZ))
 287                                 continue;
 288                         usb_unlink_urb(this_urb);
 289                         continue;
 290                 }
 291                 if (this_urb->status != 0)
 292                         dbg("usb_write %p failed (err=%d)",
 293                                 this_urb, this_urb->status);
 294
 295                 dbg("%s: endpoint %d buf %d", __FUNCTION__,
 296                         usb_pipeendpoint(this_urb->pipe), i);
 297
 298                 /* send the data */
 299                 memcpy (this_urb->transfer_buffer, buf, todo);
 300                 this_urb->transfer_buffer_length = todo;
 301
 302                 this_urb->dev = port->serial->dev;
 303                 err = usb_submit_urb(this_urb, GFP_ATOMIC);
 304                 if (err) {
 305                         dbg("usb_submit_urb %p (write bulk) failed "
 306                                 "(%d, has %d)", this_urb,
 307                                 err, this_urb->status);
 308                         continue;
 309                 }
 310                 portdata->tx_start_time[i] = jiffies;
 311                 buf += todo;
 312                 left -= todo;
 313         }
 314
 315         count -= left;
 316         dbg("%s: wrote (did %d)", __FUNCTION__, count);
 317         return count;
 318 }
 319
 320 static void option_indat_callback(struct urb *urb, struct pt_regs *regs)
 321 {
 322         int i, err;
 323         int endpoint;
 324         struct usb_serial_port *port;
 325         struct tty_struct *tty;
 326         unsigned char *data = urb->transfer_buffer;
 327
 328         dbg("%s: %p", __FUNCTION__, urb);
 329
 330         endpoint = usb_pipeendpoint(urb->pipe);
 331         port = (struct usb_serial_port *) urb->context;
 332
 333         if (urb->status) {
 334                 dbg("%s: nonzero status: %d on endpoint %02x.",
 335                     __FUNCTION__, urb->status, endpoint);
 336         } else {
 337                 tty = port->tty;
 338                 if (urb->actual_length) {
 339                         for (i = 0; i < urb->actual_length ; ++i) {
 340                                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
 341                                         tty_flip_buffer_push(tty);
 342                                 tty_insert_flip_char(tty, data[i], 0);
 343                         }
 344                         tty_flip_buffer_push(tty);
 345                 } else {
 346                         dbg("%s: empty read urb received", __FUNCTION__);
 347                 }
 348
 349                 /* Resubmit urb so we continue receiving */
 350                 if (port->open_count && urb->status != -ESHUTDOWN) {
 351                         err = usb_submit_urb(urb, GFP_ATOMIC);
 352                         if (err)
 353                                 printk(KERN_ERR "%s: resubmit read urb failed. "
 354                                         "(%d)", __FUNCTION__, err);
 355                 }
 356         }
 357         return;
 358 }
 359
 360 static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
 361 {
 362         struct usb_serial_port *port;
 363
 364         dbg("%s", __FUNCTION__);
 365
 366         port = (struct usb_serial_port *) urb->context;
 367
 368         if (port->open_count)
 369                 schedule_work(&port->work);
 370 }
 371
 372 static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
 373 {
 374         int err;
 375         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
 376         struct option_port_private *portdata = usb_get_serial_port_data(port);
 377         struct usb_serial *serial = port->serial;
 378
 379         dbg("%s", __FUNCTION__);
 380         dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
 381
 382         if (urb->status == 0) {
 383                 struct usb_ctrlrequest *req_pkt =
 384                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 385
 386                 if (!req_pkt) {
 387                         dbg("%s: NULL req_pkt\n", __FUNCTION__);
 388                         return;
 389                 }
 390                 if ((req_pkt->bRequestType == 0xA1) &&
 391                                 (req_pkt->bRequest == 0x20)) {
 392                         int old_dcd_state;
 393                         unsigned char signals = *((unsigned char *)
 394                                         urb->transfer_buffer +
 395                                         sizeof(struct usb_ctrlrequest));
 396
 397                         dbg("%s: signal x%x", __FUNCTION__, signals);
 398
 399                         old_dcd_state = portdata->dcd_state;
 400                         portdata->cts_state = 1;
 401                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 402                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 403                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 404
 405                         if (port->tty && !C_CLOCAL(port->tty) &&
 406                                         old_dcd_state && !portdata->dcd_state)
 407                                 tty_hangup(port->tty);
 408                 } else {
 409                         dbg("%s: type %x req %x", __FUNCTION__,
 410                                 req_pkt->bRequestType,req_pkt->bRequest);
 411                 }
 412         } else
 413                 dbg("%s: error %d", __FUNCTION__, urb->status);
 414
 415         /* Resubmit urb so we continue receiving IRQ data */
 416         if (urb->status != -ESHUTDOWN) {
 417                 urb->dev = serial->dev;
 418                 err = usb_submit_urb(urb, GFP_ATOMIC);
 419                 if (err)
 420                         dbg("%s: resubmit intr urb failed. (%d)",
 421                                 __FUNCTION__, err);
 422         }
 423 }
 424
 425 static int option_write_room(struct usb_serial_port *port)
 426 {
 427         struct option_port_private *portdata;
 428         int i;
 429         int data_len = 0;
 430         struct urb *this_urb;
 431
 432         portdata = usb_get_serial_port_data(port);
 433
 434         for (i=0; i < N_OUT_URB; i++) {
 435                 this_urb = portdata->out_urbs[i];
 436                 if (this_urb && this_urb->status != -EINPROGRESS)
 437                         data_len += OUT_BUFLEN;
 438         }
 439
 440         dbg("%s: %d", __FUNCTION__, data_len);
 441         return data_len;
 442 }
 443
 444 static int option_chars_in_buffer(struct usb_serial_port *port)
 445 {
 446         struct option_port_private *portdata;
 447         int i;
 448         int data_len = 0;
 449         struct urb *this_urb;
 450
 451         portdata = usb_get_serial_port_data(port);
 452
 453         for (i=0; i < N_OUT_URB; i++) {
 454                 this_urb = portdata->out_urbs[i];
 455                 if (this_urb && this_urb->status == -EINPROGRESS)
 456                         data_len += this_urb->transfer_buffer_length;
 457         }
 458         dbg("%s: %d", __FUNCTION__, data_len);
 459         return data_len;
 460 }
 461
 462 static int option_open(struct usb_serial_port *port, struct file *filp)
 463 {
 464         struct option_port_private *portdata;
 465         struct usb_serial *serial = port->serial;
 466         int i, err;
 467         struct urb *urb;
 468
 469         portdata = usb_get_serial_port_data(port);
 470
 471         dbg("%s", __FUNCTION__);
 472
 473         /* Set some sane defaults */
 474         portdata->rts_state = 1;
 475         portdata->dtr_state = 1;
 476
 477         /* Reset low level data toggle and start reading from endpoints */
 478         for (i = 0; i < N_IN_URB; i++) {
 479                 urb = portdata->in_urbs[i];
 480                 if (! urb)
 481                         continue;
 482                 if (urb->dev != serial->dev) {
 483                         dbg("%s: dev %p != %p", __FUNCTION__,
 484                                 urb->dev, serial->dev);
 485                         continue;
 486                 }
 487
 488                 /*
 489                  * make sure endpoint data toggle is synchronized with the
 490                  * device
 491                  */
 492                 usb_clear_halt(urb->dev, urb->pipe);
 493
 494                 err = usb_submit_urb(urb, GFP_KERNEL);
 495                 if (err) {
 496                         dbg("%s: submit urb %d failed (%d) %d",
 497                                 __FUNCTION__, i, err,
 498                                 urb->transfer_buffer_length);
 499                 }
 500         }
 501
 502         /* Reset low level data toggle on out endpoints */
 503         for (i = 0; i < N_OUT_URB; i++) {
 504                 urb = portdata->out_urbs[i];
 505                 if (! urb)
 506                         continue;
 507                 urb->dev = serial->dev;
 508                 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
 509                                 usb_pipeout(urb->pipe), 0); */
 510         }
 511
 512         port->tty->low_latency = 1;
 513
 514         option_send_setup(port);
 515
 516         return (0);
 517 }
 518
 519 static inline void stop_urb(struct urb *urb)
 520 {
 521         if (urb && urb->status == -EINPROGRESS)
 522                 usb_kill_urb(urb);
 523 }
 524
 525 static void option_close(struct usb_serial_port *port, struct file *filp)
 526 {
 527         int i;
 528         struct usb_serial *serial = port->serial;
 529         struct option_port_private *portdata;
 530
 531         dbg("%s", __FUNCTION__);
 532         portdata = usb_get_serial_port_data(port);
 533
 534         portdata->rts_state = 0;
 535         portdata->dtr_state = 0;
 536
 537         if (serial->dev) {
 538                 option_send_setup(port);
 539
 540                 /* Stop reading/writing urbs */
 541                 for (i = 0; i < N_IN_URB; i++)
 542                         stop_urb(portdata->in_urbs[i]);
 543                 for (i = 0; i < N_OUT_URB; i++)
 544                         stop_urb(portdata->out_urbs[i]);
 545         }
 546         port->tty = NULL;
 547 }
 548
 549 /* Helper functions used by option_setup_urbs */
 550 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
 551                 int dir, void *ctx, char *buf, int len,
 552                 void (*callback)(struct urb *, struct pt_regs *regs))
 553 {
 554         struct urb *urb;
 555
 556         if (endpoint == -1)
 557                 return NULL;            /* endpoint not needed */
 558
 559         urb = usb_alloc_urb(0, GFP_KERNEL);             /* No ISO */
 560         if (urb == NULL) {
 561                 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
 562                 return NULL;
 563         }
 564
 565                 /* Fill URB using supplied data. */
 566         usb_fill_bulk_urb(urb, serial->dev,
 567                       usb_sndbulkpipe(serial->dev, endpoint) | dir,
 568                       buf, len, callback, ctx);
 569
 570         return urb;
 571 }
 572
 573 /* Setup urbs */
 574 static void option_setup_urbs(struct usb_serial *serial)
 575 {
 576         int j;
 577         struct usb_serial_port *port;
 578         struct option_port_private *portdata;
 579
 580         dbg("%s", __FUNCTION__);
 581
 582         port = serial->port[0];
 583         portdata = usb_get_serial_port_data(port);
 584
 585         /* Do indat endpoints first */
 586         for (j = 0; j <= N_IN_URB; ++j) {
 587                 portdata->in_urbs[j] = option_setup_urb (serial,
 588                   port->bulk_in_endpointAddress, USB_DIR_IN, port,
 589                   portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
 590         }
 591
 592         /* outdat endpoints */
 593         for (j = 0; j <= N_OUT_URB; ++j) {
 594                 portdata->out_urbs[j] = option_setup_urb (serial,
 595                   port->bulk_out_endpointAddress, USB_DIR_OUT, port,
 596                   portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
 597         }
 598 }
 599
 600 static int option_send_setup(struct usb_serial_port *port)
 601 {
 602         struct usb_serial *serial = port->serial;
 603         struct option_port_private *portdata;
 604
 605         dbg("%s", __FUNCTION__);
 606
 607         portdata = usb_get_serial_port_data(port);
 608
 609         if (port->tty) {
 610                 int val = 0;
 611                 if (portdata->dtr_state)
 612                         val |= 0x01;
 613                 if (portdata->rts_state)
 614                         val |= 0x02;
 615
 616                 return usb_control_msg(serial->dev,
 617                                 usb_rcvctrlpipe(serial->dev, 0),
 618                                 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
 619         }
 620
 621         return 0;
 622 }
 623
 624 static int option_startup(struct usb_serial *serial)
 625 {
 626         int i, err;
 627         struct usb_serial_port *port;
 628         struct option_port_private *portdata;
 629
 630         dbg("%s", __FUNCTION__);
 631
 632         /* Now setup per port private data */
 633         for (i = 0; i < serial->num_ports; i++) {
 634                 port = serial->port[i];
 635                 portdata = kmalloc(sizeof(*portdata), GFP_KERNEL);
 636                 if (!portdata) {
 637                         dbg("%s: kmalloc for option_port_private (%d) failed!.",
 638                                         __FUNCTION__, i);
 639                         return (1);
 640                 }
 641                 memset(portdata, 0, sizeof(struct option_port_private));
 642
 643                 usb_set_serial_port_data(port, portdata);
 644
 645                 if (! port->interrupt_in_urb)
 646                         continue;
 647                 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 648                 if (err)
 649                         dbg("%s: submit irq_in urb failed %d",
 650                                 __FUNCTION__, err);
 651         }
 652
 653         option_setup_urbs(serial);
 654
 655         return (0);
 656 }
 657
 658 static void option_shutdown(struct usb_serial *serial)
 659 {
 660         int i, j;
 661         struct usb_serial_port *port;
 662         struct option_port_private *portdata;
 663
 664         dbg("%s", __FUNCTION__);
 665
 666         /* Stop reading/writing urbs */
 667         for (i = 0; i < serial->num_ports; ++i) {
 668                 port = serial->port[i];
 669                 portdata = usb_get_serial_port_data(port);
 670                 for (j = 0; j < N_IN_URB; j++)
 671                         stop_urb(portdata->in_urbs[j]);
 672                 for (j = 0; j < N_OUT_URB; j++)
 673                         stop_urb(portdata->out_urbs[j]);
 674         }
 675
 676         /* Now free them */
 677         for (i = 0; i < serial->num_ports; ++i) {
 678                 port = serial->port[i];
 679                 portdata = usb_get_serial_port_data(port);
 680
 681                 for (j = 0; j < N_IN_URB; j++) {
 682                         if (portdata->in_urbs[j]) {
 683                                 usb_free_urb(portdata->in_urbs[j]);
 684                                 portdata->in_urbs[j] = NULL;
 685                         }
 686                 }
 687                 for (j = 0; j < N_OUT_URB; j++) {
 688                         if (portdata->out_urbs[j]) {
 689                                 usb_free_urb(portdata->out_urbs[j]);
 690                                 portdata->out_urbs[j] = NULL;
 691                         }
 692                 }
 693         }
 694
 695         /* Now free per port private data */
 696         for (i = 0; i < serial->num_ports; i++) {
 697                 port = serial->port[i];
 698                 kfree(usb_get_serial_port_data(port));
 699         }
 700 }
 701
 702 MODULE_AUTHOR(DRIVER_AUTHOR);
 703 MODULE_DESCRIPTION(DRIVER_DESC);
 704 MODULE_VERSION(DRIVER_VERSION);
 705 MODULE_LICENSE("GPL");
 706
 707 #ifdef CONFIG_USB_DEBUG
 708 module_param(debug, bool, S_IRUGO | S_IWUSR);
 709 MODULE_PARM_DESC(debug, "Debug messages");
 710 #endif
 711