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