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
  30   Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
  31
  32 */
  33
  34 #define DRIVER_VERSION "v0.4"
  35 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
  36 #define DRIVER_DESC "Option Card (PC-Card to) USB to Serial Driver"
  37
  38 #include <linux/config.h>
  39 #include <linux/kernel.h>
  40 #include <linux/jiffies.h>
  41 #include <linux/errno.h>
  42 #include <linux/tty.h>
  43 #include <linux/tty_flip.h>
  44 #include <linux/module.h>
  45 #include <linux/usb.h>
  46 #include "usb-serial.h"
  47
  48 /* Function prototypes */
  49 static int  option_open(struct usb_serial_port *port, struct file *filp);
  50 static void option_close(struct usb_serial_port *port, struct file *filp);
  51 static int  option_startup(struct usb_serial *serial);
  52 static void option_shutdown(struct usb_serial *serial);
  53 static void option_rx_throttle(struct usb_serial_port *port);
  54 static void option_rx_unthrottle(struct usb_serial_port *port);
  55 static int  option_write_room(struct usb_serial_port *port);
  56
  57 static void option_instat_callback(struct urb *urb, struct pt_regs *regs);
  58
  59 static int option_write(struct usb_serial_port *port,
  60                         const unsigned char *buf, int count);
  61
  62 static int  option_chars_in_buffer(struct usb_serial_port *port);
  63 static int  option_ioctl(struct usb_serial_port *port, struct file *file,
  64                         unsigned int cmd, unsigned long arg);
  65 static void option_set_termios(struct usb_serial_port *port,
  66                                 struct termios *old);
  67 static void option_break_ctl(struct usb_serial_port *port, int break_state);
  68 static int  option_tiocmget(struct usb_serial_port *port, struct file *file);
  69 static int  option_tiocmset(struct usb_serial_port *port, struct file *file,
  70                                 unsigned int set, unsigned int clear);
  71 static int  option_send_setup(struct usb_serial_port *port);
  72
  73 /* Vendor and product IDs */
  74 #define OPTION_VENDOR_ID                        0x0AF0
  75 #define HUAWEI_VENDOR_ID                        0x12D1
  76 #define AUDIOVOX_VENDOR_ID                      0x0F3D
  77
  78 #define OPTION_PRODUCT_OLD              0x5000
  79 #define OPTION_PRODUCT_FUSION   0x6000
  80 #define OPTION_PRODUCT_FUSION2  0x6300
  81 #define HUAWEI_PRODUCT_E600     0x1001
  82 #define AUDIOVOX_PRODUCT_AIRCARD 0x0112
  83
  84 static struct usb_device_id option_ids[] = {
  85         { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_OLD) },
  86         { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION) },
  87         { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUSION2) },
  88         { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
  89         { USB_DEVICE(AUDIOVOX_VENDOR_ID, AUDIOVOX_PRODUCT_AIRCARD) },
  90         { } /* Terminating entry */
  91 };
  92
  93 MODULE_DEVICE_TABLE(usb, option_ids);
  94
  95 static struct usb_driver option_driver = {
  96         .owner      = THIS_MODULE,
  97         .name       = "option",
  98         .probe      = usb_serial_probe,
  99         .disconnect = usb_serial_disconnect,
 100         .id_table   = option_ids,
 101 };
 102
 103 /* The card has three separate interfaces, wich the serial driver
 104  * recognizes separately, thus num_port=1.
 105  */
 106 static struct usb_serial_device_type option_3port_device = {
 107         .owner             = THIS_MODULE,
 108         .name              = "Option 3G data card",
 109         .short_name        = "option",
 110         .id_table          = option_ids,
 111         .num_interrupt_in  = NUM_DONT_CARE,
 112         .num_bulk_in       = NUM_DONT_CARE,
 113         .num_bulk_out      = NUM_DONT_CARE,
 114         .num_ports         = 1, /* 3, but the card reports its ports separately */
 115         .open              = option_open,
 116         .close             = option_close,
 117         .write             = option_write,
 118         .write_room        = option_write_room,
 119         .chars_in_buffer   = option_chars_in_buffer,
 120         .throttle          = option_rx_throttle,
 121         .unthrottle        = option_rx_unthrottle,
 122         .ioctl             = option_ioctl,
 123         .set_termios       = option_set_termios,
 124         .break_ctl         = option_break_ctl,
 125         .tiocmget          = option_tiocmget,
 126         .tiocmset          = option_tiocmset,
 127         .attach            = option_startup,
 128         .shutdown          = option_shutdown,
 129         .read_int_callback = option_instat_callback,
 130 };
 131
 132 #ifdef CONFIG_USB_DEBUG
 133 static int debug;
 134 #else
 135 #define debug 0
 136 #endif
 137
 138 /* per port private data */
 139
 140 #define N_IN_URB 4
 141 #define N_OUT_URB 1
 142 #define IN_BUFLEN 1024
 143 #define OUT_BUFLEN 128
 144
 145 struct option_port_private {
 146         /* Input endpoints and buffer for this port */
 147         struct urb *in_urbs[N_IN_URB];
 148         char in_buffer[N_IN_URB][IN_BUFLEN];
 149         /* Output endpoints and buffer for this port */
 150         struct urb *out_urbs[N_OUT_URB];
 151         char out_buffer[N_OUT_URB][OUT_BUFLEN];
 152
 153         /* Settings for the port */
 154         int rts_state;  /* Handshaking pins (outputs) */
 155         int dtr_state;
 156         int cts_state;  /* Handshaking pins (inputs) */
 157         int dsr_state;
 158         int dcd_state;
 159         int ri_state;
 160
 161         unsigned long tx_start_time[N_OUT_URB];
 162 };
 163
 164 /* Functions used by new usb-serial code. */
 165 static int __init option_init(void)
 166 {
 167         int retval;
 168         retval = usb_serial_register(&option_3port_device);
 169         if (retval)
 170                 goto failed_3port_device_register;
 171         retval = usb_register(&option_driver);
 172         if (retval)
 173                 goto failed_driver_register;
 174
 175         info(DRIVER_DESC ": " DRIVER_VERSION);
 176
 177         return 0;
 178
 179 failed_driver_register:
 180         usb_serial_deregister (&option_3port_device);
 181 failed_3port_device_register:
 182         return retval;
 183 }
 184
 185 static void __exit option_exit(void)
 186 {
 187         usb_deregister (&option_driver);
 188         usb_serial_deregister (&option_3port_device);
 189 }
 190
 191 module_init(option_init);
 192 module_exit(option_exit);
 193
 194 static void option_rx_throttle(struct usb_serial_port *port)
 195 {
 196         dbg("%s", __FUNCTION__);
 197 }
 198
 199 static void option_rx_unthrottle(struct usb_serial_port *port)
 200 {
 201         dbg("%s", __FUNCTION__);
 202 }
 203
 204 static void option_break_ctl(struct usb_serial_port *port, int break_state)
 205 {
 206         /* Unfortunately, I don't know how to send a break */
 207         dbg("%s", __FUNCTION__);
 208 }
 209
 210 static void option_set_termios(struct usb_serial_port *port,
 211                         struct termios *old_termios)
 212 {
 213         dbg("%s", __FUNCTION__);
 214
 215         option_send_setup(port);
 216 }
 217
 218 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
 219 {
 220         unsigned int value;
 221         struct option_port_private *portdata;
 222
 223         portdata = usb_get_serial_port_data(port);
 224
 225         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 226                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 227                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 228                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 229                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 230                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 231
 232         return value;
 233 }
 234
 235 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
 236                         unsigned int set, unsigned int clear)
 237 {
 238         struct option_port_private *portdata;
 239
 240         portdata = usb_get_serial_port_data(port);
 241
 242         if (set & TIOCM_RTS)
 243                 portdata->rts_state = 1;
 244         if (set & TIOCM_DTR)
 245                 portdata->dtr_state = 1;
 246
 247         if (clear & TIOCM_RTS)
 248                 portdata->rts_state = 0;
 249         if (clear & TIOCM_DTR)
 250                 portdata->dtr_state = 0;
 251         return option_send_setup(port);
 252 }
 253
 254 static int option_ioctl(struct usb_serial_port *port, struct file *file,
 255                         unsigned int cmd, unsigned long arg)
 256 {
 257         return -ENOIOCTLCMD;
 258 }
 259
 260 /* Write */
 261 static int option_write(struct usb_serial_port *port,
 262                         const unsigned char *buf, int count)
 263 {
 264         struct option_port_private *portdata;
 265         int i;
 266         int left, todo;
 267         struct urb *this_urb = NULL; /* spurious */
 268         int err;
 269
 270         portdata = usb_get_serial_port_data(port);
 271
 272         dbg("%s: write (%d chars)", __FUNCTION__, count);
 273
 274         i = 0;
 275         left = count;
 276         for (i=0; left > 0 && i < N_OUT_URB; i++) {
 277                 todo = left;
 278                 if (todo > OUT_BUFLEN)
 279                         todo = OUT_BUFLEN;
 280
 281                 this_urb = portdata->out_urbs[i];
 282                 if (this_urb->status == -EINPROGRESS) {
 283                         if (time_before(jiffies,
 284                                         portdata->tx_start_time[i] + 10 * HZ))
 285                                 continue;
 286                         usb_unlink_urb(this_urb);
 287                         continue;
 288                 }
 289                 if (this_urb->status != 0)
 290                         dbg("usb_write %p failed (err=%d)",
 291                                 this_urb, this_urb->status);
 292
 293                 dbg("%s: endpoint %d buf %d", __FUNCTION__,
 294                         usb_pipeendpoint(this_urb->pipe), i);
 295
 296                 /* send the data */
 297                 memcpy (this_urb->transfer_buffer, buf, todo);
 298                 this_urb->transfer_buffer_length = todo;
 299
 300                 this_urb->dev = port->serial->dev;
 301                 err = usb_submit_urb(this_urb, GFP_ATOMIC);
 302                 if (err) {
 303                         dbg("usb_submit_urb %p (write bulk) failed "
 304                                 "(%d, has %d)", this_urb,
 305                                 err, this_urb->status);
 306                         continue;
 307                 }
 308                 portdata->tx_start_time[i] = jiffies;
 309                 buf += todo;
 310                 left -= todo;
 311         }
 312
 313         count -= left;
 314         dbg("%s: wrote (did %d)", __FUNCTION__, count);
 315         return count;
 316 }
 317
 318 static void option_indat_callback(struct urb *urb, struct pt_regs *regs)
 319 {
 320         int i, err;
 321         int endpoint;
 322         struct usb_serial_port *port;
 323         struct tty_struct *tty;
 324         unsigned char *data = urb->transfer_buffer;
 325
 326         dbg("%s: %p", __FUNCTION__, urb);
 327
 328         endpoint = usb_pipeendpoint(urb->pipe);
 329         port = (struct usb_serial_port *) urb->context;
 330
 331         if (urb->status) {
 332                 dbg("%s: nonzero status: %d on endpoint %02x.",
 333                     __FUNCTION__, urb->status, endpoint);
 334         } else {
 335                 tty = port->tty;
 336                 if (urb->actual_length) {
 337                         for (i = 0; i < urb->actual_length ; ++i) {
 338                                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
 339                                         tty_flip_buffer_push(tty);
 340                                 tty_insert_flip_char(tty, data[i], 0);
 341                         }
 342                         tty_flip_buffer_push(tty);
 343                 } else {
 344                         dbg("%s: empty read urb received", __FUNCTION__);
 345                 }
 346
 347                 /* Resubmit urb so we continue receiving */
 348                 if (port->open_count && urb->status != -ESHUTDOWN) {
 349                         err = usb_submit_urb(urb, GFP_ATOMIC);
 350                         if (err)
 351                                 printk(KERN_ERR "%s: resubmit read urb failed. "
 352                                         "(%d)", __FUNCTION__, err);
 353                 }
 354         }
 355         return;
 356 }
 357
 358 static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
 359 {
 360         struct usb_serial_port *port;
 361
 362         dbg("%s", __FUNCTION__);
 363
 364         port = (struct usb_serial_port *) urb->context;
 365
 366         if (port->open_count)
 367                 schedule_work(&port->work);
 368 }
 369
 370 static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
 371 {
 372         int err;
 373         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
 374         struct option_port_private *portdata = usb_get_serial_port_data(port);
 375         struct usb_serial *serial = port->serial;
 376
 377         dbg("%s", __FUNCTION__);
 378         dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
 379
 380         if (urb->status == 0) {
 381                 struct usb_ctrlrequest *req_pkt =
 382                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 383
 384                 if (!req_pkt) {
 385                         dbg("%s: NULL req_pkt\n", __FUNCTION__);
 386                         return;
 387                 }
 388                 if ((req_pkt->bRequestType == 0xA1) &&
 389                                 (req_pkt->bRequest == 0x20)) {
 390                         int old_dcd_state;
 391                         unsigned char signals = *((unsigned char *)
 392                                         urb->transfer_buffer +
 393                                         sizeof(struct usb_ctrlrequest));
 394
 395                         dbg("%s: signal x%x", __FUNCTION__, signals);
 396
 397                         old_dcd_state = portdata->dcd_state;
 398                         portdata->cts_state = 1;
 399                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 400                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 401                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 402
 403                         if (port->tty && !C_CLOCAL(port->tty) &&
 404                                         old_dcd_state && !portdata->dcd_state)
 405                                 tty_hangup(port->tty);
 406                 } else {
 407                         dbg("%s: type %x req %x", __FUNCTION__,
 408                                 req_pkt->bRequestType,req_pkt->bRequest);
 409                 }
 410         } else
 411                 dbg("%s: error %d", __FUNCTION__, urb->status);
 412
 413         /* Resubmit urb so we continue receiving IRQ data */
 414         if (urb->status != -ESHUTDOWN) {
 415                 urb->dev = serial->dev;
 416                 err = usb_submit_urb(urb, GFP_ATOMIC);
 417                 if (err)
 418                         dbg("%s: resubmit intr urb failed. (%d)",
 419                                 __FUNCTION__, err);
 420         }
 421 }
 422
 423 static int option_write_room(struct usb_serial_port *port)
 424 {
 425         struct option_port_private *portdata;
 426         int i;
 427         int data_len = 0;
 428         struct urb *this_urb;
 429
 430         portdata = usb_get_serial_port_data(port);
 431
 432         for (i=0; i < N_OUT_URB; i++) {
 433                 this_urb = portdata->out_urbs[i];
 434                 if (this_urb && this_urb->status != -EINPROGRESS)
 435                         data_len += OUT_BUFLEN;
 436         }
 437
 438         dbg("%s: %d", __FUNCTION__, data_len);
 439         return data_len;
 440 }
 441
 442 static int option_chars_in_buffer(struct usb_serial_port *port)
 443 {
 444         struct option_port_private *portdata;
 445         int i;
 446         int data_len = 0;
 447         struct urb *this_urb;
 448
 449         portdata = usb_get_serial_port_data(port);
 450
 451         for (i=0; i < N_OUT_URB; i++) {
 452                 this_urb = portdata->out_urbs[i];
 453                 if (this_urb && this_urb->status == -EINPROGRESS)
 454                         data_len += this_urb->transfer_buffer_length;
 455         }
 456         dbg("%s: %d", __FUNCTION__, data_len);
 457         return data_len;
 458 }
 459
 460 static int option_open(struct usb_serial_port *port, struct file *filp)
 461 {
 462         struct option_port_private *portdata;
 463         struct usb_serial *serial = port->serial;
 464         int i, err;
 465         struct urb *urb;
 466
 467         portdata = usb_get_serial_port_data(port);
 468
 469         dbg("%s", __FUNCTION__);
 470
 471         /* Set some sane defaults */
 472         portdata->rts_state = 1;
 473         portdata->dtr_state = 1;
 474
 475         /* Reset low level data toggle and start reading from endpoints */
 476         for (i = 0; i < N_IN_URB; i++) {
 477                 urb = portdata->in_urbs[i];
 478                 if (! urb)
 479                         continue;
 480                 if (urb->dev != serial->dev) {
 481                         dbg("%s: dev %p != %p", __FUNCTION__,
 482                                 urb->dev, serial->dev);
 483                         continue;
 484                 }
 485
 486                 /*
 487                  * make sure endpoint data toggle is synchronized with the
 488                  * device
 489                  */
 490                 usb_clear_halt(urb->dev, urb->pipe);
 491
 492                 err = usb_submit_urb(urb, GFP_KERNEL);
 493                 if (err) {
 494                         dbg("%s: submit urb %d failed (%d) %d",
 495                                 __FUNCTION__, i, err,
 496                                 urb->transfer_buffer_length);
 497                 }
 498         }
 499
 500         /* Reset low level data toggle on out endpoints */
 501         for (i = 0; i < N_OUT_URB; i++) {
 502                 urb = portdata->out_urbs[i];
 503                 if (! urb)
 504                         continue;
 505                 urb->dev = serial->dev;
 506                 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
 507                                 usb_pipeout(urb->pipe), 0); */
 508         }
 509
 510         port->tty->low_latency = 1;
 511
 512         option_send_setup(port);
 513
 514         return (0);
 515 }
 516
 517 static inline void stop_urb(struct urb *urb)
 518 {
 519         if (urb && urb->status == -EINPROGRESS)
 520                 usb_kill_urb(urb);
 521 }
 522
 523 static void option_close(struct usb_serial_port *port, struct file *filp)
 524 {
 525         int i;
 526         struct usb_serial *serial = port->serial;
 527         struct option_port_private *portdata;
 528
 529         dbg("%s", __FUNCTION__);
 530         portdata = usb_get_serial_port_data(port);
 531
 532         portdata->rts_state = 0;
 533         portdata->dtr_state = 0;
 534
 535         if (serial->dev) {
 536                 option_send_setup(port);
 537
 538                 /* Stop reading/writing urbs */
 539                 for (i = 0; i < N_IN_URB; i++)
 540                         stop_urb(portdata->in_urbs[i]);
 541                 for (i = 0; i < N_OUT_URB; i++)
 542                         stop_urb(portdata->out_urbs[i]);
 543         }
 544         port->tty = NULL;
 545 }
 546
 547 /* Helper functions used by option_setup_urbs */
 548 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
 549                 int dir, void *ctx, char *buf, int len,
 550                 void (*callback)(struct urb *, struct pt_regs *regs))
 551 {
 552         struct urb *urb;
 553
 554         if (endpoint == -1)
 555                 return NULL;            /* endpoint not needed */
 556
 557         urb = usb_alloc_urb(0, GFP_KERNEL);             /* No ISO */
 558         if (urb == NULL) {
 559                 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
 560                 return NULL;
 561         }
 562
 563                 /* Fill URB using supplied data. */
 564         usb_fill_bulk_urb(urb, serial->dev,
 565                       usb_sndbulkpipe(serial->dev, endpoint) | dir,
 566                       buf, len, callback, ctx);
 567
 568         return urb;
 569 }
 570
 571 /* Setup urbs */
 572 static void option_setup_urbs(struct usb_serial *serial)
 573 {
 574         int j;
 575         struct usb_serial_port *port;
 576         struct option_port_private *portdata;
 577
 578         dbg("%s", __FUNCTION__);
 579
 580         port = serial->port[0];
 581         portdata = usb_get_serial_port_data(port);
 582
 583         /* Do indat endpoints first */
 584         for (j = 0; j <= N_IN_URB; ++j) {
 585                 portdata->in_urbs[j] = option_setup_urb (serial,
 586                   port->bulk_in_endpointAddress, USB_DIR_IN, port,
 587                   portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
 588         }
 589
 590         /* outdat endpoints */
 591         for (j = 0; j <= N_OUT_URB; ++j) {
 592                 portdata->out_urbs[j] = option_setup_urb (serial,
 593                   port->bulk_out_endpointAddress, USB_DIR_OUT, port,
 594                   portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
 595         }
 596 }
 597
 598 static int option_send_setup(struct usb_serial_port *port)
 599 {
 600         struct usb_serial *serial = port->serial;
 601         struct option_port_private *portdata;
 602
 603         dbg("%s", __FUNCTION__);
 604
 605         portdata = usb_get_serial_port_data(port);
 606
 607         if (port->tty) {
 608                 int val = 0;
 609                 if (portdata->dtr_state)
 610                         val |= 0x01;
 611                 if (portdata->rts_state)
 612                         val |= 0x02;
 613
 614                 return usb_control_msg(serial->dev,
 615                                 usb_rcvctrlpipe(serial->dev, 0),
 616                                 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
 617         }
 618
 619         return 0;
 620 }
 621
 622 static int option_startup(struct usb_serial *serial)
 623 {
 624         int i, err;
 625         struct usb_serial_port *port;
 626         struct option_port_private *portdata;
 627
 628         dbg("%s", __FUNCTION__);
 629
 630         /* Now setup per port private data */
 631         for (i = 0; i < serial->num_ports; i++) {
 632                 port = serial->port[i];
 633                 portdata = kmalloc(sizeof(*portdata), GFP_KERNEL);
 634                 if (!portdata) {
 635                         dbg("%s: kmalloc for option_port_private (%d) failed!.",
 636                                         __FUNCTION__, i);
 637                         return (1);
 638                 }
 639                 memset(portdata, 0, sizeof(struct option_port_private));
 640
 641                 usb_set_serial_port_data(port, portdata);
 642
 643                 if (! port->interrupt_in_urb)
 644                         continue;
 645                 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 646                 if (err)
 647                         dbg("%s: submit irq_in urb failed %d",
 648                                 __FUNCTION__, err);
 649         }
 650
 651         option_setup_urbs(serial);
 652
 653         return (0);
 654 }
 655
 656 static void option_shutdown(struct usb_serial *serial)
 657 {
 658         int i, j;
 659         struct usb_serial_port *port;
 660         struct option_port_private *portdata;
 661
 662         dbg("%s", __FUNCTION__);
 663
 664         /* Stop reading/writing urbs */
 665         for (i = 0; i < serial->num_ports; ++i) {
 666                 port = serial->port[i];
 667                 portdata = usb_get_serial_port_data(port);
 668                 for (j = 0; j < N_IN_URB; j++)
 669                         stop_urb(portdata->in_urbs[j]);
 670                 for (j = 0; j < N_OUT_URB; j++)
 671                         stop_urb(portdata->out_urbs[j]);
 672         }
 673
 674         /* Now free them */
 675         for (i = 0; i < serial->num_ports; ++i) {
 676                 port = serial->port[i];
 677                 portdata = usb_get_serial_port_data(port);
 678
 679                 for (j = 0; j < N_IN_URB; j++) {
 680                         if (portdata->in_urbs[j]) {
 681                                 usb_free_urb(portdata->in_urbs[j]);
 682                                 portdata->in_urbs[j] = NULL;
 683                         }
 684                 }
 685                 for (j = 0; j < N_OUT_URB; j++) {
 686                         if (portdata->out_urbs[j]) {
 687                                 usb_free_urb(portdata->out_urbs[j]);
 688                                 portdata->out_urbs[j] = NULL;
 689                         }
 690                 }
 691         }
 692
 693         /* Now free per port private data */
 694         for (i = 0; i < serial->num_ports; i++) {
 695                 port = serial->port[i];
 696                 kfree(usb_get_serial_port_data(port));
 697         }
 698 }
 699
 700 MODULE_AUTHOR(DRIVER_AUTHOR);
 701 MODULE_DESCRIPTION(DRIVER_DESC);
 702 MODULE_VERSION(DRIVER_VERSION);
 703 MODULE_LICENSE("GPL");
 704
 705 #ifdef CONFIG_USB_DEBUG
 706 module_param(debug, bool, S_IRUGO | S_IWUSR);
 707 MODULE_PARM_DESC(debug, "Debug messages");
 708 #endif
 709