err.no Git - linux-2.6/blob - 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 (this_urb->transfer_flags & URB_ASYNC_UNLINK)
 277                                 continue;
 278                         if (time_before(jiffies,
 279                                         portdata->tx_start_time[i] + 10 * HZ))
 280                                 continue;
 281                         this_urb->transfer_flags |= URB_ASYNC_UNLINK;
 282                         usb_unlink_urb(this_urb);
 283                         continue;
 284                 }
 285                 if (this_urb->status != 0)
 286                         dbg("usb_write %p failed (err=%d)",
 287                                 this_urb, this_urb->status);
 288
 289                 dbg("%s: endpoint %d buf %d", __FUNCTION__,
 290                         usb_pipeendpoint(this_urb->pipe), i);
 291
 292                 /* send the data */
 293                 memcpy (this_urb->transfer_buffer, buf, todo);
 294                 this_urb->transfer_buffer_length = todo;
 295
 296                 this_urb->transfer_flags &= ~URB_ASYNC_UNLINK;
 297                 this_urb->dev = port->serial->dev;
 298                 err = usb_submit_urb(this_urb, GFP_ATOMIC);
 299                 if (err) {
 300                         dbg("usb_submit_urb %p (write bulk) failed "
 301                                 "(%d, has %d)", this_urb,
 302                                 err, this_urb->status);
 303                         continue;
 304                 }
 305                 portdata->tx_start_time[i] = jiffies;
 306                 buf += todo;
 307                 left -= todo;
 308         }
 309
 310         count -= left;
 311         dbg("%s: wrote (did %d)", __FUNCTION__, count);
 312         return count;
 313 }
 314
 315 static void option_indat_callback(struct urb *urb, struct pt_regs *regs)
 316 {
 317         int i, err;
 318         int endpoint;
 319         struct usb_serial_port *port;
 320         struct tty_struct *tty;
 321         unsigned char *data = urb->transfer_buffer;
 322
 323         dbg("%s: %p", __FUNCTION__, urb);
 324
 325         endpoint = usb_pipeendpoint(urb->pipe);
 326         port = (struct usb_serial_port *) urb->context;
 327
 328         if (urb->status) {
 329                 dbg("%s: nonzero status: %d on endpoint %02x.",
 330                     __FUNCTION__, urb->status, endpoint);
 331         } else {
 332                 tty = port->tty;
 333                 if (urb->actual_length) {
 334                         for (i = 0; i < urb->actual_length ; ++i) {
 335                                 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
 336                                         tty_flip_buffer_push(tty);
 337                                 tty_insert_flip_char(tty, data[i], 0);
 338                         }
 339                         tty_flip_buffer_push(tty);
 340                 } else {
 341                         dbg("%s: empty read urb received", __FUNCTION__);
 342                 }
 343
 344                 /* Resubmit urb so we continue receiving */
 345                 if (port->open_count && urb->status != -ESHUTDOWN) {
 346                         err = usb_submit_urb(urb, GFP_ATOMIC);
 347                         if (err)
 348                                 printk(KERN_ERR "%s: resubmit read urb failed. "
 349                                         "(%d)", __FUNCTION__, err);
 350                 }
 351         }
 352         return;
 353 }
 354
 355 static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
 356 {
 357         struct usb_serial_port *port;
 358
 359         dbg("%s", __FUNCTION__);
 360
 361         port = (struct usb_serial_port *) urb->context;
 362
 363         if (port->open_count)
 364                 schedule_work(&port->work);
 365 }
 366
 367 static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
 368 {
 369         int err;
 370         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
 371         struct option_port_private *portdata = usb_get_serial_port_data(port);
 372         struct usb_serial *serial = port->serial;
 373
 374         dbg("%s", __FUNCTION__);
 375         dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
 376
 377         if (urb->status == 0) {
 378                 struct usb_ctrlrequest *req_pkt =
 379                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 380
 381                 if (!req_pkt) {
 382                         dbg("%s: NULL req_pkt\n", __FUNCTION__);
 383                         return;
 384                 }
 385                 if ((req_pkt->bRequestType == 0xA1) &&
 386                                 (req_pkt->bRequest == 0x20)) {
 387                         int old_dcd_state;
 388                         unsigned char signals = *((unsigned char *)
 389                                         urb->transfer_buffer +
 390                                         sizeof(struct usb_ctrlrequest));
 391
 392                         dbg("%s: signal x%x", __FUNCTION__, signals);
 393
 394                         old_dcd_state = portdata->dcd_state;
 395                         portdata->cts_state = 1;
 396                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 397                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 398                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 399
 400                         if (port->tty && !C_CLOCAL(port->tty) &&
 401                                         old_dcd_state && !portdata->dcd_state)
 402                                 tty_hangup(port->tty);
 403                 } else {
 404                         dbg("%s: type %x req %x", __FUNCTION__,
 405                                 req_pkt->bRequestType,req_pkt->bRequest);
 406                 }
 407         } else
 408                 dbg("%s: error %d", __FUNCTION__, urb->status);
 409
 410         /* Resubmit urb so we continue receiving IRQ data */
 411         if (urb->status != -ESHUTDOWN) {
 412                 urb->dev = serial->dev;
 413                 err = usb_submit_urb(urb, GFP_ATOMIC);
 414                 if (err)
 415                         dbg("%s: resubmit intr urb failed. (%d)",
 416                                 __FUNCTION__, err);
 417         }
 418 }
 419
 420 static int option_write_room(struct usb_serial_port *port)
 421 {
 422         struct option_port_private *portdata;
 423         int i;
 424         int data_len = 0;
 425         struct urb *this_urb;
 426
 427         portdata = usb_get_serial_port_data(port);
 428
 429         for (i=0; i < N_OUT_URB; i++) {
 430                 this_urb = portdata->out_urbs[i];
 431                 if (this_urb && this_urb->status != -EINPROGRESS)
 432                         data_len += OUT_BUFLEN;
 433         }
 434
 435         dbg("%s: %d", __FUNCTION__, data_len);
 436         return data_len;
 437 }
 438
 439 static int option_chars_in_buffer(struct usb_serial_port *port)
 440 {
 441         struct option_port_private *portdata;
 442         int i;
 443         int data_len = 0;
 444         struct urb *this_urb;
 445
 446         portdata = usb_get_serial_port_data(port);
 447
 448         for (i=0; i < N_OUT_URB; i++) {
 449                 this_urb = portdata->out_urbs[i];
 450                 if (this_urb && this_urb->status == -EINPROGRESS)
 451                         data_len += this_urb->transfer_buffer_length;
 452         }
 453         dbg("%s: %d", __FUNCTION__, data_len);
 454         return data_len;
 455 }
 456
 457 static int option_open(struct usb_serial_port *port, struct file *filp)
 458 {
 459         struct option_port_private *portdata;
 460         struct usb_serial *serial = port->serial;
 461         int i, err;
 462         struct urb *urb;
 463
 464         portdata = usb_get_serial_port_data(port);
 465
 466         dbg("%s", __FUNCTION__);
 467
 468         /* Set some sane defaults */
 469         portdata->rts_state = 1;
 470         portdata->dtr_state = 1;
 471
 472         /* Reset low level data toggle and start reading from endpoints */
 473         for (i = 0; i < N_IN_URB; i++) {
 474                 urb = portdata->in_urbs[i];
 475                 if (! urb)
 476                         continue;
 477                 if (urb->dev != serial->dev) {
 478                         dbg("%s: dev %p != %p", __FUNCTION__,
 479                                 urb->dev, serial->dev);
 480                         continue;
 481                 }
 482
 483                 /*
 484                  * make sure endpoint data toggle is synchronized with the
 485                  * device
 486                  */
 487                 usb_clear_halt(urb->dev, urb->pipe);
 488
 489                 err = usb_submit_urb(urb, GFP_KERNEL);
 490                 if (err) {
 491                         dbg("%s: submit urb %d failed (%d) %d",
 492                                 __FUNCTION__, i, err,
 493                                 urb->transfer_buffer_length);
 494                 }
 495         }
 496
 497         /* Reset low level data toggle on out endpoints */
 498         for (i = 0; i < N_OUT_URB; i++) {
 499                 urb = portdata->out_urbs[i];
 500                 if (! urb)
 501                         continue;
 502                 urb->dev = serial->dev;
 503                 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
 504                                 usb_pipeout(urb->pipe), 0); */
 505         }
 506
 507         port->tty->low_latency = 1;
 508
 509         option_send_setup(port);
 510
 511         return (0);
 512 }
 513
 514 static inline void stop_urb(struct urb *urb)
 515 {
 516         if (urb && urb->status == -EINPROGRESS) {
 517                 urb->transfer_flags &= ~URB_ASYNC_UNLINK;
 518                 usb_kill_urb(urb);
 519         }
 520 }
 521
 522 static void option_close(struct usb_serial_port *port, struct file *filp)
 523 {
 524         int i;
 525         struct usb_serial *serial = port->serial;
 526         struct option_port_private *portdata;
 527
 528         dbg("%s", __FUNCTION__);
 529         portdata = usb_get_serial_port_data(port);
 530
 531         portdata->rts_state = 0;
 532         portdata->dtr_state = 0;
 533
 534         if (serial->dev) {
 535                 option_send_setup(port);
 536
 537                 /* Stop reading/writing urbs */
 538                 for (i = 0; i < N_IN_URB; i++)
 539                         stop_urb(portdata->in_urbs[i]);
 540                 for (i = 0; i < N_OUT_URB; i++)
 541                         stop_urb(portdata->out_urbs[i]);
 542         }
 543         port->tty = NULL;
 544 }
 545
 546 /* Helper functions used by option_setup_urbs */
 547 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
 548                 int dir, void *ctx, char *buf, int len,
 549                 void (*callback)(struct urb *, struct pt_regs *regs))
 550 {
 551         struct urb *urb;
 552
 553         if (endpoint == -1)
 554                 return NULL;            /* endpoint not needed */
 555
 556         urb = usb_alloc_urb(0, GFP_KERNEL);             /* No ISO */
 557         if (urb == NULL) {
 558                 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
 559                 return NULL;
 560         }
 561
 562                 /* Fill URB using supplied data. */
 563         usb_fill_bulk_urb(urb, serial->dev,
 564                       usb_sndbulkpipe(serial->dev, endpoint) | dir,
 565                       buf, len, callback, ctx);
 566
 567         return urb;
 568 }
 569
 570 /* Setup urbs */
 571 static void option_setup_urbs(struct usb_serial *serial)
 572 {
 573         int j;
 574         struct usb_serial_port *port;
 575         struct option_port_private *portdata;
 576
 577         dbg("%s", __FUNCTION__);
 578
 579         port = serial->port[0];
 580         portdata = usb_get_serial_port_data(port);
 581
 582         /* Do indat endpoints first */
 583         for (j = 0; j <= N_IN_URB; ++j) {
 584                 portdata->in_urbs[j] = option_setup_urb (serial,
 585                   port->bulk_in_endpointAddress, USB_DIR_IN, port,
 586                   portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
 587         }
 588
 589         /* outdat endpoints */
 590         for (j = 0; j <= N_OUT_URB; ++j) {
 591                 portdata->out_urbs[j] = option_setup_urb (serial,
 592                   port->bulk_out_endpointAddress, USB_DIR_OUT, port,
 593                   portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
 594         }
 595 }
 596
 597 static int option_send_setup(struct usb_serial_port *port)
 598 {
 599         struct usb_serial *serial = port->serial;
 600         struct option_port_private *portdata;
 601
 602         dbg("%s", __FUNCTION__);
 603
 604         portdata = usb_get_serial_port_data(port);
 605
 606         if (port->tty) {
 607                 int val = 0;
 608                 if (portdata->dtr_state)
 609                         val |= 0x01;
 610                 if (portdata->rts_state)
 611                         val |= 0x02;
 612
 613                 return usb_control_msg(serial->dev,
 614                                 usb_rcvctrlpipe(serial->dev, 0),
 615                                 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
 616         }
 617
 618         return 0;
 619 }
 620
 621 static int option_startup(struct usb_serial *serial)
 622 {
 623         int i, err;
 624         struct usb_serial_port *port;
 625         struct option_port_private *portdata;
 626
 627         dbg("%s", __FUNCTION__);
 628
 629         /* Now setup per port private data */
 630         for (i = 0; i < serial->num_ports; i++) {
 631                 port = serial->port[i];
 632                 portdata = kmalloc(sizeof(*portdata), GFP_KERNEL);
 633                 if (!portdata) {
 634                         dbg("%s: kmalloc for option_port_private (%d) failed!.",
 635                                         __FUNCTION__, i);
 636                         return (1);
 637                 }
 638                 memset(portdata, 0, sizeof(struct option_port_private));
 639
 640                 usb_set_serial_port_data(port, portdata);
 641
 642                 if (! port->interrupt_in_urb)
 643                         continue;
 644                 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 645                 if (err)
 646                         dbg("%s: submit irq_in urb failed %d",
 647                                 __FUNCTION__, err);
 648         }
 649
 650         option_setup_urbs(serial);
 651
 652         return (0);
 653 }
 654
 655 static void option_shutdown(struct usb_serial *serial)
 656 {
 657         int i, j;
 658         struct usb_serial_port *port;
 659         struct option_port_private *portdata;
 660
 661         dbg("%s", __FUNCTION__);
 662
 663         /* Stop reading/writing urbs */
 664         for (i = 0; i < serial->num_ports; ++i) {
 665                 port = serial->port[i];
 666                 portdata = usb_get_serial_port_data(port);
 667                 for (j = 0; j < N_IN_URB; j++)
 668                         stop_urb(portdata->in_urbs[j]);
 669                 for (j = 0; j < N_OUT_URB; j++)
 670                         stop_urb(portdata->out_urbs[j]);
 671         }
 672
 673         /* Now free them */
 674         for (i = 0; i < serial->num_ports; ++i) {
 675                 port = serial->port[i];
 676                 portdata = usb_get_serial_port_data(port);
 677
 678                 for (j = 0; j < N_IN_URB; j++) {
 679                         if (portdata->in_urbs[j]) {
 680                                 usb_free_urb(portdata->in_urbs[j]);
 681                                 portdata->in_urbs[j] = NULL;
 682                         }
 683                 }
 684                 for (j = 0; j < N_OUT_URB; j++) {
 685                         if (portdata->out_urbs[j]) {
 686                                 usb_free_urb(portdata->out_urbs[j]);
 687                                 portdata->out_urbs[j] = NULL;
 688                         }
 689                 }
 690         }
 691
 692         /* Now free per port private data */
 693         for (i = 0; i < serial->num_ports; i++) {
 694                 port = serial->port[i];
 695                 kfree(usb_get_serial_port_data(port));
 696         }
 697 }
 698
 699 MODULE_AUTHOR(DRIVER_AUTHOR);
 700 MODULE_DESCRIPTION(DRIVER_DESC);
 701 MODULE_VERSION(DRIVER_VERSION);
 702 MODULE_LICENSE("GPL");
 703
 704 #ifdef CONFIG_USB_DEBUG
 705 module_param(debug, bool, S_IRUGO | S_IWUSR);
 706 MODULE_PARM_DESC(debug, "Debug messages");
 707 #endif
 708