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_driver option_3port_device = {
 109         .driver = {
 110                 .owner =        THIS_MODULE,
 111                 .name =         "option",
 112         },
 113         .description       = "Option 3G data card",
 114         .id_table          = option_ids,
 115         .num_interrupt_in  = NUM_DONT_CARE,
 116         .num_bulk_in       = NUM_DONT_CARE,
 117         .num_bulk_out      = NUM_DONT_CARE,
 118         .num_ports         = 1, /* 3, but the card reports its ports separately */
 119         .open              = option_open,
 120         .close             = option_close,
 121         .write             = option_write,
 122         .write_room        = option_write_room,
 123         .chars_in_buffer   = option_chars_in_buffer,
 124         .throttle          = option_rx_throttle,
 125         .unthrottle        = option_rx_unthrottle,
 126         .ioctl             = option_ioctl,
 127         .set_termios       = option_set_termios,
 128         .break_ctl         = option_break_ctl,
 129         .tiocmget          = option_tiocmget,
 130         .tiocmset          = option_tiocmset,
 131         .attach            = option_startup,
 132         .shutdown          = option_shutdown,
 133         .read_int_callback = option_instat_callback,
 134 };
 135
 136 #ifdef CONFIG_USB_DEBUG
 137 static int debug;
 138 #else
 139 #define debug 0
 140 #endif
 141
 142 /* per port private data */
 143
 144 #define N_IN_URB 4
 145 #define N_OUT_URB 1
 146 #define IN_BUFLEN 4096
 147 #define OUT_BUFLEN 128
 148
 149 struct option_port_private {
 150         /* Input endpoints and buffer for this port */
 151         struct urb *in_urbs[N_IN_URB];
 152         char in_buffer[N_IN_URB][IN_BUFLEN];
 153         /* Output endpoints and buffer for this port */
 154         struct urb *out_urbs[N_OUT_URB];
 155         char out_buffer[N_OUT_URB][OUT_BUFLEN];
 156
 157         /* Settings for the port */
 158         int rts_state;  /* Handshaking pins (outputs) */
 159         int dtr_state;
 160         int cts_state;  /* Handshaking pins (inputs) */
 161         int dsr_state;
 162         int dcd_state;
 163         int ri_state;
 164
 165         unsigned long tx_start_time[N_OUT_URB];
 166 };
 167
 168 /* Functions used by new usb-serial code. */
 169 static int __init option_init(void)
 170 {
 171         int retval;
 172         retval = usb_serial_register(&option_3port_device);
 173         if (retval)
 174                 goto failed_3port_device_register;
 175         retval = usb_register(&option_driver);
 176         if (retval)
 177                 goto failed_driver_register;
 178
 179         info(DRIVER_DESC ": " DRIVER_VERSION);
 180
 181         return 0;
 182
 183 failed_driver_register:
 184         usb_serial_deregister (&option_3port_device);
 185 failed_3port_device_register:
 186         return retval;
 187 }
 188
 189 static void __exit option_exit(void)
 190 {
 191         usb_deregister (&option_driver);
 192         usb_serial_deregister (&option_3port_device);
 193 }
 194
 195 module_init(option_init);
 196 module_exit(option_exit);
 197
 198 static void option_rx_throttle(struct usb_serial_port *port)
 199 {
 200         dbg("%s", __FUNCTION__);
 201 }
 202
 203 static void option_rx_unthrottle(struct usb_serial_port *port)
 204 {
 205         dbg("%s", __FUNCTION__);
 206 }
 207
 208 static void option_break_ctl(struct usb_serial_port *port, int break_state)
 209 {
 210         /* Unfortunately, I don't know how to send a break */
 211         dbg("%s", __FUNCTION__);
 212 }
 213
 214 static void option_set_termios(struct usb_serial_port *port,
 215                         struct termios *old_termios)
 216 {
 217         dbg("%s", __FUNCTION__);
 218
 219         option_send_setup(port);
 220 }
 221
 222 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
 223 {
 224         unsigned int value;
 225         struct option_port_private *portdata;
 226
 227         portdata = usb_get_serial_port_data(port);
 228
 229         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 230                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 231                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 232                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 233                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 234                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 235
 236         return value;
 237 }
 238
 239 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
 240                         unsigned int set, unsigned int clear)
 241 {
 242         struct option_port_private *portdata;
 243
 244         portdata = usb_get_serial_port_data(port);
 245
 246         if (set & TIOCM_RTS)
 247                 portdata->rts_state = 1;
 248         if (set & TIOCM_DTR)
 249                 portdata->dtr_state = 1;
 250
 251         if (clear & TIOCM_RTS)
 252                 portdata->rts_state = 0;
 253         if (clear & TIOCM_DTR)
 254                 portdata->dtr_state = 0;
 255         return option_send_setup(port);
 256 }
 257
 258 static int option_ioctl(struct usb_serial_port *port, struct file *file,
 259                         unsigned int cmd, unsigned long arg)
 260 {
 261         return -ENOIOCTLCMD;
 262 }
 263
 264 /* Write */
 265 static int option_write(struct usb_serial_port *port,
 266                         const unsigned char *buf, int count)
 267 {
 268         struct option_port_private *portdata;
 269         int i;
 270         int left, todo;
 271         struct urb *this_urb = NULL; /* spurious */
 272         int err;
 273
 274         portdata = usb_get_serial_port_data(port);
 275
 276         dbg("%s: write (%d chars)", __FUNCTION__, count);
 277
 278         i = 0;
 279         left = count;
 280         for (i=0; left > 0 && i < N_OUT_URB; i++) {
 281                 todo = left;
 282                 if (todo > OUT_BUFLEN)
 283                         todo = OUT_BUFLEN;
 284
 285                 this_urb = portdata->out_urbs[i];
 286                 if (this_urb->status == -EINPROGRESS) {
 287                         if (time_before(jiffies,
 288                                         portdata->tx_start_time[i] + 10 * HZ))
 289                                 continue;
 290                         usb_unlink_urb(this_urb);
 291                         continue;
 292                 }
 293                 if (this_urb->status != 0)
 294                         dbg("usb_write %p failed (err=%d)",
 295                                 this_urb, this_urb->status);
 296
 297                 dbg("%s: endpoint %d buf %d", __FUNCTION__,
 298                         usb_pipeendpoint(this_urb->pipe), i);
 299
 300                 /* send the data */
 301                 memcpy (this_urb->transfer_buffer, buf, todo);
 302                 this_urb->transfer_buffer_length = todo;
 303
 304                 this_urb->dev = port->serial->dev;
 305                 err = usb_submit_urb(this_urb, GFP_ATOMIC);
 306                 if (err) {
 307                         dbg("usb_submit_urb %p (write bulk) failed "
 308                                 "(%d, has %d)", this_urb,
 309                                 err, this_urb->status);
 310                         continue;
 311                 }
 312                 portdata->tx_start_time[i] = jiffies;
 313                 buf += todo;
 314                 left -= todo;
 315         }
 316
 317         count -= left;
 318         dbg("%s: wrote (did %d)", __FUNCTION__, count);
 319         return count;
 320 }
 321
 322 static void option_indat_callback(struct urb *urb, struct pt_regs *regs)
 323 {
 324         int i, err;
 325         int endpoint;
 326         struct usb_serial_port *port;
 327         struct tty_struct *tty;
 328         unsigned char *data = urb->transfer_buffer;
 329
 330         dbg("%s: %p", __FUNCTION__, urb);
 331
 332         endpoint = usb_pipeendpoint(urb->pipe);
 333         port = (struct usb_serial_port *) urb->context;
 334
 335         if (urb->status) {
 336                 dbg("%s: nonzero status: %d on endpoint %02x.",
 337                     __FUNCTION__, urb->status, endpoint);
 338         } else {
 339                 tty = port->tty;
 340                 if (urb->actual_length) {
 341                         for (i = 0; i < urb->actual_length ; ++i) {
 342                                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
 343                                         tty_flip_buffer_push(tty);
 344                                 tty_insert_flip_char(tty, data[i], 0);
 345                         }
 346                         tty_flip_buffer_push(tty);
 347                 } else {
 348                         dbg("%s: empty read urb received", __FUNCTION__);
 349                 }
 350
 351                 /* Resubmit urb so we continue receiving */
 352                 if (port->open_count && urb->status != -ESHUTDOWN) {
 353                         err = usb_submit_urb(urb, GFP_ATOMIC);
 354                         if (err)
 355                                 printk(KERN_ERR "%s: resubmit read urb failed. "
 356                                         "(%d)", __FUNCTION__, err);
 357                 }
 358         }
 359         return;
 360 }
 361
 362 static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
 363 {
 364         struct usb_serial_port *port;
 365
 366         dbg("%s", __FUNCTION__);
 367
 368         port = (struct usb_serial_port *) urb->context;
 369
 370         if (port->open_count)
 371                 schedule_work(&port->work);
 372 }
 373
 374 static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
 375 {
 376         int err;
 377         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
 378         struct option_port_private *portdata = usb_get_serial_port_data(port);
 379         struct usb_serial *serial = port->serial;
 380
 381         dbg("%s", __FUNCTION__);
 382         dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
 383
 384         if (urb->status == 0) {
 385                 struct usb_ctrlrequest *req_pkt =
 386                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 387
 388                 if (!req_pkt) {
 389                         dbg("%s: NULL req_pkt\n", __FUNCTION__);
 390                         return;
 391                 }
 392                 if ((req_pkt->bRequestType == 0xA1) &&
 393                                 (req_pkt->bRequest == 0x20)) {
 394                         int old_dcd_state;
 395                         unsigned char signals = *((unsigned char *)
 396                                         urb->transfer_buffer +
 397                                         sizeof(struct usb_ctrlrequest));
 398
 399                         dbg("%s: signal x%x", __FUNCTION__, signals);
 400
 401                         old_dcd_state = portdata->dcd_state;
 402                         portdata->cts_state = 1;
 403                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 404                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 405                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 406
 407                         if (port->tty && !C_CLOCAL(port->tty) &&
 408                                         old_dcd_state && !portdata->dcd_state)
 409                                 tty_hangup(port->tty);
 410                 } else {
 411                         dbg("%s: type %x req %x", __FUNCTION__,
 412                                 req_pkt->bRequestType,req_pkt->bRequest);
 413                 }
 414         } else
 415                 dbg("%s: error %d", __FUNCTION__, urb->status);
 416
 417         /* Resubmit urb so we continue receiving IRQ data */
 418         if (urb->status != -ESHUTDOWN) {
 419                 urb->dev = serial->dev;
 420                 err = usb_submit_urb(urb, GFP_ATOMIC);
 421                 if (err)
 422                         dbg("%s: resubmit intr urb failed. (%d)",
 423                                 __FUNCTION__, err);
 424         }
 425 }
 426
 427 static int option_write_room(struct usb_serial_port *port)
 428 {
 429         struct option_port_private *portdata;
 430         int i;
 431         int data_len = 0;
 432         struct urb *this_urb;
 433
 434         portdata = usb_get_serial_port_data(port);
 435
 436         for (i=0; i < N_OUT_URB; i++) {
 437                 this_urb = portdata->out_urbs[i];
 438                 if (this_urb && this_urb->status != -EINPROGRESS)
 439                         data_len += OUT_BUFLEN;
 440         }
 441
 442         dbg("%s: %d", __FUNCTION__, data_len);
 443         return data_len;
 444 }
 445
 446 static int option_chars_in_buffer(struct usb_serial_port *port)
 447 {
 448         struct option_port_private *portdata;
 449         int i;
 450         int data_len = 0;
 451         struct urb *this_urb;
 452
 453         portdata = usb_get_serial_port_data(port);
 454
 455         for (i=0; i < N_OUT_URB; i++) {
 456                 this_urb = portdata->out_urbs[i];
 457                 if (this_urb && this_urb->status == -EINPROGRESS)
 458                         data_len += this_urb->transfer_buffer_length;
 459         }
 460         dbg("%s: %d", __FUNCTION__, data_len);
 461         return data_len;
 462 }
 463
 464 static int option_open(struct usb_serial_port *port, struct file *filp)
 465 {
 466         struct option_port_private *portdata;
 467         struct usb_serial *serial = port->serial;
 468         int i, err;
 469         struct urb *urb;
 470
 471         portdata = usb_get_serial_port_data(port);
 472
 473         dbg("%s", __FUNCTION__);
 474
 475         /* Set some sane defaults */
 476         portdata->rts_state = 1;
 477         portdata->dtr_state = 1;
 478
 479         /* Reset low level data toggle and start reading from endpoints */
 480         for (i = 0; i < N_IN_URB; i++) {
 481                 urb = portdata->in_urbs[i];
 482                 if (! urb)
 483                         continue;
 484                 if (urb->dev != serial->dev) {
 485                         dbg("%s: dev %p != %p", __FUNCTION__,
 486                                 urb->dev, serial->dev);
 487                         continue;
 488                 }
 489
 490                 /*
 491                  * make sure endpoint data toggle is synchronized with the
 492                  * device
 493                  */
 494                 usb_clear_halt(urb->dev, urb->pipe);
 495
 496                 err = usb_submit_urb(urb, GFP_KERNEL);
 497                 if (err) {
 498                         dbg("%s: submit urb %d failed (%d) %d",
 499                                 __FUNCTION__, i, err,
 500                                 urb->transfer_buffer_length);
 501                 }
 502         }
 503
 504         /* Reset low level data toggle on out endpoints */
 505         for (i = 0; i < N_OUT_URB; i++) {
 506                 urb = portdata->out_urbs[i];
 507                 if (! urb)
 508                         continue;
 509                 urb->dev = serial->dev;
 510                 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
 511                                 usb_pipeout(urb->pipe), 0); */
 512         }
 513
 514         port->tty->low_latency = 1;
 515
 516         option_send_setup(port);
 517
 518         return (0);
 519 }
 520
 521 static inline void stop_urb(struct urb *urb)
 522 {
 523         if (urb && urb->status == -EINPROGRESS)
 524                 usb_kill_urb(urb);
 525 }
 526
 527 static void option_close(struct usb_serial_port *port, struct file *filp)
 528 {
 529         int i;
 530         struct usb_serial *serial = port->serial;
 531         struct option_port_private *portdata;
 532
 533         dbg("%s", __FUNCTION__);
 534         portdata = usb_get_serial_port_data(port);
 535
 536         portdata->rts_state = 0;
 537         portdata->dtr_state = 0;
 538
 539         if (serial->dev) {
 540                 option_send_setup(port);
 541
 542                 /* Stop reading/writing urbs */
 543                 for (i = 0; i < N_IN_URB; i++)
 544                         stop_urb(portdata->in_urbs[i]);
 545                 for (i = 0; i < N_OUT_URB; i++)
 546                         stop_urb(portdata->out_urbs[i]);
 547         }
 548         port->tty = NULL;
 549 }
 550
 551 /* Helper functions used by option_setup_urbs */
 552 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
 553                 int dir, void *ctx, char *buf, int len,
 554                 void (*callback)(struct urb *, struct pt_regs *regs))
 555 {
 556         struct urb *urb;
 557
 558         if (endpoint == -1)
 559                 return NULL;            /* endpoint not needed */
 560
 561         urb = usb_alloc_urb(0, GFP_KERNEL);             /* No ISO */
 562         if (urb == NULL) {
 563                 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
 564                 return NULL;
 565         }
 566
 567                 /* Fill URB using supplied data. */
 568         usb_fill_bulk_urb(urb, serial->dev,
 569                       usb_sndbulkpipe(serial->dev, endpoint) | dir,
 570                       buf, len, callback, ctx);
 571
 572         return urb;
 573 }
 574
 575 /* Setup urbs */
 576 static void option_setup_urbs(struct usb_serial *serial)
 577 {
 578         int j;
 579         struct usb_serial_port *port;
 580         struct option_port_private *portdata;
 581
 582         dbg("%s", __FUNCTION__);
 583
 584         port = serial->port[0];
 585         portdata = usb_get_serial_port_data(port);
 586
 587         /* Do indat endpoints first */
 588         for (j = 0; j <= N_IN_URB; ++j) {
 589                 portdata->in_urbs[j] = option_setup_urb (serial,
 590                   port->bulk_in_endpointAddress, USB_DIR_IN, port,
 591                   portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
 592         }
 593
 594         /* outdat endpoints */
 595         for (j = 0; j <= N_OUT_URB; ++j) {
 596                 portdata->out_urbs[j] = option_setup_urb (serial,
 597                   port->bulk_out_endpointAddress, USB_DIR_OUT, port,
 598                   portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
 599         }
 600 }
 601
 602 static int option_send_setup(struct usb_serial_port *port)
 603 {
 604         struct usb_serial *serial = port->serial;
 605         struct option_port_private *portdata;
 606
 607         dbg("%s", __FUNCTION__);
 608
 609         portdata = usb_get_serial_port_data(port);
 610
 611         if (port->tty) {
 612                 int val = 0;
 613                 if (portdata->dtr_state)
 614                         val |= 0x01;
 615                 if (portdata->rts_state)
 616                         val |= 0x02;
 617
 618                 return usb_control_msg(serial->dev,
 619                                 usb_rcvctrlpipe(serial->dev, 0),
 620                                 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
 621         }
 622
 623         return 0;
 624 }
 625
 626 static int option_startup(struct usb_serial *serial)
 627 {
 628         int i, err;
 629         struct usb_serial_port *port;
 630         struct option_port_private *portdata;
 631
 632         dbg("%s", __FUNCTION__);
 633
 634         /* Now setup per port private data */
 635         for (i = 0; i < serial->num_ports; i++) {
 636                 port = serial->port[i];
 637                 portdata = kmalloc(sizeof(*portdata), GFP_KERNEL);
 638                 if (!portdata) {
 639                         dbg("%s: kmalloc for option_port_private (%d) failed!.",
 640                                         __FUNCTION__, i);
 641                         return (1);
 642                 }
 643                 memset(portdata, 0, sizeof(struct option_port_private));
 644
 645                 usb_set_serial_port_data(port, portdata);
 646
 647                 if (! port->interrupt_in_urb)
 648                         continue;
 649                 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 650                 if (err)
 651                         dbg("%s: submit irq_in urb failed %d",
 652                                 __FUNCTION__, err);
 653         }
 654
 655         option_setup_urbs(serial);
 656
 657         return (0);
 658 }
 659
 660 static void option_shutdown(struct usb_serial *serial)
 661 {
 662         int i, j;
 663         struct usb_serial_port *port;
 664         struct option_port_private *portdata;
 665
 666         dbg("%s", __FUNCTION__);
 667
 668         /* Stop reading/writing urbs */
 669         for (i = 0; i < serial->num_ports; ++i) {
 670                 port = serial->port[i];
 671                 portdata = usb_get_serial_port_data(port);
 672                 for (j = 0; j < N_IN_URB; j++)
 673                         stop_urb(portdata->in_urbs[j]);
 674                 for (j = 0; j < N_OUT_URB; j++)
 675                         stop_urb(portdata->out_urbs[j]);
 676         }
 677
 678         /* Now free them */
 679         for (i = 0; i < serial->num_ports; ++i) {
 680                 port = serial->port[i];
 681                 portdata = usb_get_serial_port_data(port);
 682
 683                 for (j = 0; j < N_IN_URB; j++) {
 684                         if (portdata->in_urbs[j]) {
 685                                 usb_free_urb(portdata->in_urbs[j]);
 686                                 portdata->in_urbs[j] = NULL;
 687                         }
 688                 }
 689                 for (j = 0; j < N_OUT_URB; j++) {
 690                         if (portdata->out_urbs[j]) {
 691                                 usb_free_urb(portdata->out_urbs[j]);
 692                                 portdata->out_urbs[j] = NULL;
 693                         }
 694                 }
 695         }
 696
 697         /* Now free per port private data */
 698         for (i = 0; i < serial->num_ports; i++) {
 699                 port = serial->port[i];
 700                 kfree(usb_get_serial_port_data(port));
 701         }
 702 }
 703
 704 MODULE_AUTHOR(DRIVER_AUTHOR);
 705 MODULE_DESCRIPTION(DRIVER_DESC);
 706 MODULE_VERSION(DRIVER_VERSION);
 707 MODULE_LICENSE("GPL");
 708
 709 #ifdef CONFIG_USB_DEBUG
 710 module_param(debug, bool, S_IRUGO | S_IWUSR);
 711 MODULE_PARM_DESC(debug, "Debug messages");
 712 #endif
 713