release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/usb/serial/usb_wwan.c

   1 /*
   2   USB Driver layer for GSM modems
   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: see the git log.
  13
  14   Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
  15
  16   This driver exists because the "normal" serial driver doesn't work too well
  17   with GSM modems. Issues:
  18   - data loss -- one single Receive URB is not nearly enough
  19   - controlling the baud rate doesn't make sense
  20 */
  21
  22 #define DRIVER_VERSION "v0.7.2"
  23 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
  24 #define DRIVER_DESC "USB Driver for GSM modems"
  25
  26 #include <linux/kernel.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/errno.h>
  29 #include <linux/slab.h>
  30 #include <linux/tty.h>
  31 #include <linux/tty_flip.h>
  32 #include <linux/module.h>
  33 #include <linux/bitops.h>
  34 #include <linux/usb.h>
  35 #include <linux/usb/serial.h>
  36 #include "usb-wwan.h"
  37
  38 static int debug;
  39
  40 void usb_wwan_dtr_rts(struct usb_serial_port *port, int on)
  41 {
  42         struct usb_serial *serial = port->serial;
  43         struct usb_wwan_port_private *portdata;
  44
  45         struct usb_wwan_intf_private *intfdata;
  46
  47         dbg("%s", __func__);
  48
  49         intfdata = port->serial->private;
  50
  51         if (!intfdata->send_setup)
  52                 return;
  53
  54         portdata = usb_get_serial_port_data(port);
  55         mutex_lock(&serial->disc_mutex);
  56         portdata->rts_state = on;
  57         portdata->dtr_state = on;
  58         if (serial->dev)
  59                 intfdata->send_setup(port);
  60         mutex_unlock(&serial->disc_mutex);
  61 }
  62 EXPORT_SYMBOL(usb_wwan_dtr_rts);
  63
  64 void usb_wwan_set_termios(struct tty_struct *tty,
  65                           struct usb_serial_port *port,
  66                           struct ktermios *old_termios)
  67 {
  68         struct usb_wwan_intf_private *intfdata = port->serial->private;
  69
  70         dbg("%s", __func__);
  71
  72         /* Doesn't support option setting */
  73         tty_termios_copy_hw(tty->termios, old_termios);
  74
  75         if (intfdata->send_setup)
  76                 intfdata->send_setup(port);
  77 }
  78 EXPORT_SYMBOL(usb_wwan_set_termios);
  79
  80 int usb_wwan_tiocmget(struct tty_struct *tty, struct file *file)
  81 {
  82         struct usb_serial_port *port = tty->driver_data;
  83         unsigned int value;
  84         struct usb_wwan_port_private *portdata;
  85
  86         portdata = usb_get_serial_port_data(port);
  87
  88         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
  89             ((portdata->dtr_state) ? TIOCM_DTR : 0) |
  90             ((portdata->cts_state) ? TIOCM_CTS : 0) |
  91             ((portdata->dsr_state) ? TIOCM_DSR : 0) |
  92             ((portdata->dcd_state) ? TIOCM_CAR : 0) |
  93             ((portdata->ri_state) ? TIOCM_RNG : 0);
  94
  95         return value;
  96 }
  97 EXPORT_SYMBOL(usb_wwan_tiocmget);
  98
  99 int usb_wwan_tiocmset(struct tty_struct *tty, struct file *file,
 100                       unsigned int set, unsigned int clear)
 101 {
 102         struct usb_serial_port *port = tty->driver_data;
 103         struct usb_wwan_port_private *portdata;
 104         struct usb_wwan_intf_private *intfdata;
 105
 106         portdata = usb_get_serial_port_data(port);
 107         intfdata = port->serial->private;
 108
 109         if (!intfdata->send_setup)
 110                 return -EINVAL;
 111
 112         if (set & TIOCM_RTS)
 113                 portdata->rts_state = 1;
 114         if (set & TIOCM_DTR)
 115                 portdata->dtr_state = 1;
 116
 117         if (clear & TIOCM_RTS)
 118                 portdata->rts_state = 0;
 119         if (clear & TIOCM_DTR)
 120                 portdata->dtr_state = 0;
 121         return intfdata->send_setup(port);
 122 }
 123 EXPORT_SYMBOL(usb_wwan_tiocmset);
 124
 125 /* Write */
 126 int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
 127                    const unsigned char *buf, int count)
 128 {
 129         struct usb_wwan_port_private *portdata;
 130         struct usb_wwan_intf_private *intfdata;
 131         int i;
 132         int left, todo;
 133         struct urb *this_urb = NULL;    /* spurious */
 134         int err;
 135         unsigned long flags;
 136
 137         portdata = usb_get_serial_port_data(port);
 138         intfdata = port->serial->private;
 139
 140         dbg("%s: write (%d chars)", __func__, count);
 141
 142         i = 0;
 143         left = count;
 144         for (i = 0; left > 0 && i < N_OUT_URB; i++) {
 145                 todo = left;
 146                 if (todo > OUT_BUFLEN)
 147                         todo = OUT_BUFLEN;
 148
 149                 this_urb = portdata->out_urbs[i];
 150                 if (test_and_set_bit(i, &portdata->out_busy)) {
 151                         if (time_before(jiffies,
 152                                         portdata->tx_start_time[i] + 10 * HZ))
 153                                 continue;
 154                         usb_unlink_urb(this_urb);
 155                         continue;
 156                 }
 157                 dbg("%s: endpoint %d buf %d", __func__,
 158                     usb_pipeendpoint(this_urb->pipe), i);
 159
 160                 err = usb_autopm_get_interface_async(port->serial->interface);
 161                 if (err < 0)
 162                         break;
 163
 164                 /* send the data */
 165                 memcpy(this_urb->transfer_buffer, buf, todo);
 166                 this_urb->transfer_buffer_length = todo;
 167
 168                 spin_lock_irqsave(&intfdata->susp_lock, flags);
 169                 if (intfdata->suspended) {
 170                         usb_anchor_urb(this_urb, &portdata->delayed);
 171                         spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 172                 } else {
 173                         intfdata->in_flight++;
 174                         spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 175                         err = usb_submit_urb(this_urb, GFP_ATOMIC);
 176                         if (err) {
 177                                 dbg("usb_submit_urb %p (write bulk) failed "
 178                                     "(%d)", this_urb, err);
 179                                 clear_bit(i, &portdata->out_busy);
 180                                 spin_lock_irqsave(&intfdata->susp_lock, flags);
 181                                 intfdata->in_flight--;
 182                                 spin_unlock_irqrestore(&intfdata->susp_lock,
 183                                                        flags);
 184                                 continue;
 185                         }
 186                 }
 187
 188                 portdata->tx_start_time[i] = jiffies;
 189                 buf += todo;
 190                 left -= todo;
 191         }
 192
 193         count -= left;
 194         dbg("%s: wrote (did %d)", __func__, count);
 195         return count;
 196 }
 197 EXPORT_SYMBOL(usb_wwan_write);
 198
 199 static void usb_wwan_indat_callback(struct urb *urb)
 200 {
 201         int err;
 202         int endpoint;
 203         struct usb_serial_port *port;
 204         struct tty_struct *tty;
 205         unsigned char *data = urb->transfer_buffer;
 206         int status = urb->status;
 207
 208         dbg("%s: %p", __func__, urb);
 209
 210         endpoint = usb_pipeendpoint(urb->pipe);
 211         port = urb->context;
 212
 213         if (status) {
 214                 dbg("%s: nonzero status: %d on endpoint %02x.",
 215                     __func__, status, endpoint);
 216         } else {
 217                 tty = tty_port_tty_get(&port->port);
 218                 if (urb->actual_length) {
 219                         tty_insert_flip_string(tty, data, urb->actual_length);
 220                         tty_flip_buffer_push(tty);
 221                 } else
 222                         dbg("%s: empty read urb received", __func__);
 223                 tty_kref_put(tty);
 224
 225                 /* Resubmit urb so we continue receiving */
 226                 if (status != -ESHUTDOWN) {
 227                         err = usb_submit_urb(urb, GFP_ATOMIC);
 228                         if (err && err != -EPERM)
 229                                 printk(KERN_ERR "%s: resubmit read urb failed. "
 230                                        "(%d)", __func__, err);
 231                         else
 232                                 usb_mark_last_busy(port->serial->dev);
 233                 }
 234
 235         }
 236         return;
 237 }
 238
 239 static void usb_wwan_outdat_callback(struct urb *urb)
 240 {
 241         struct usb_serial_port *port;
 242         struct usb_wwan_port_private *portdata;
 243         struct usb_wwan_intf_private *intfdata;
 244         int i;
 245
 246         dbg("%s", __func__);
 247
 248         port = urb->context;
 249         intfdata = port->serial->private;
 250
 251         usb_serial_port_softint(port);
 252         usb_autopm_put_interface_async(port->serial->interface);
 253         portdata = usb_get_serial_port_data(port);
 254         spin_lock(&intfdata->susp_lock);
 255         intfdata->in_flight--;
 256         spin_unlock(&intfdata->susp_lock);
 257
 258         for (i = 0; i < N_OUT_URB; ++i) {
 259                 if (portdata->out_urbs[i] == urb) {
 260                         smp_mb__before_clear_bit();
 261                         clear_bit(i, &portdata->out_busy);
 262                         break;
 263                 }
 264         }
 265 }
 266
 267 int usb_wwan_write_room(struct tty_struct *tty)
 268 {
 269         struct usb_serial_port *port = tty->driver_data;
 270         struct usb_wwan_port_private *portdata;
 271         int i;
 272         int data_len = 0;
 273         struct urb *this_urb;
 274
 275         portdata = usb_get_serial_port_data(port);
 276
 277         for (i = 0; i < N_OUT_URB; i++) {
 278                 this_urb = portdata->out_urbs[i];
 279                 if (this_urb && !test_bit(i, &portdata->out_busy))
 280                         data_len += OUT_BUFLEN;
 281         }
 282
 283         dbg("%s: %d", __func__, data_len);
 284         return data_len;
 285 }
 286 EXPORT_SYMBOL(usb_wwan_write_room);
 287
 288 int usb_wwan_chars_in_buffer(struct tty_struct *tty)
 289 {
 290         struct usb_serial_port *port = tty->driver_data;
 291         struct usb_wwan_port_private *portdata;
 292         int i;
 293         int data_len = 0;
 294         struct urb *this_urb;
 295
 296         portdata = usb_get_serial_port_data(port);
 297
 298         for (i = 0; i < N_OUT_URB; i++) {
 299                 this_urb = portdata->out_urbs[i];
 300                 if (this_urb && test_bit(i, &portdata->out_busy))
 301                         data_len += this_urb->transfer_buffer_length;
 302         }
 303         dbg("%s: %d", __func__, data_len);
 304         return data_len;
 305 }
 306 EXPORT_SYMBOL(usb_wwan_chars_in_buffer);
 307
 308 int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port)
 309 {
 310         struct usb_wwan_port_private *portdata;
 311         struct usb_wwan_intf_private *intfdata;
 312         struct usb_serial *serial = port->serial;
 313         int i, err;
 314         struct urb *urb;
 315
 316         portdata = usb_get_serial_port_data(port);
 317         intfdata = serial->private;
 318
 319         dbg("%s", __func__);
 320
 321         /* Start reading from the IN endpoint */
 322         for (i = 0; i < N_IN_URB; i++) {
 323                 urb = portdata->in_urbs[i];
 324                 if (!urb)
 325                         continue;
 326                 err = usb_submit_urb(urb, GFP_KERNEL);
 327                 if (err) {
 328                         dbg("%s: submit urb %d failed (%d) %d",
 329                             __func__, i, err, urb->transfer_buffer_length);
 330                 }
 331         }
 332
 333         if (intfdata->send_setup)
 334                 intfdata->send_setup(port);
 335
 336         serial->interface->needs_remote_wakeup = 1;
 337         spin_lock_irq(&intfdata->susp_lock);
 338         portdata->opened = 1;
 339         spin_unlock_irq(&intfdata->susp_lock);
 340         usb_autopm_put_interface(serial->interface);
 341
 342         return 0;
 343 }
 344 EXPORT_SYMBOL(usb_wwan_open);
 345
 346 void usb_wwan_close(struct usb_serial_port *port)
 347 {
 348         int i;
 349         struct usb_serial *serial = port->serial;
 350         struct usb_wwan_port_private *portdata;
 351         struct usb_wwan_intf_private *intfdata = port->serial->private;
 352
 353         dbg("%s", __func__);
 354         portdata = usb_get_serial_port_data(port);
 355
 356         if (serial->dev) {
 357                 /* Stop reading/writing urbs */
 358                 spin_lock_irq(&intfdata->susp_lock);
 359                 portdata->opened = 0;
 360                 spin_unlock_irq(&intfdata->susp_lock);
 361
 362                 for (i = 0; i < N_IN_URB; i++)
 363                         usb_kill_urb(portdata->in_urbs[i]);
 364                 for (i = 0; i < N_OUT_URB; i++)
 365                         usb_kill_urb(portdata->out_urbs[i]);
 366                 usb_autopm_get_interface(serial->interface);
 367                 serial->interface->needs_remote_wakeup = 0;
 368         }
 369 }
 370 EXPORT_SYMBOL(usb_wwan_close);
 371
 372 /* Helper functions used by usb_wwan_setup_urbs */
 373 static struct urb *usb_wwan_setup_urb(struct usb_serial *serial, int endpoint,
 374                                       int dir, void *ctx, char *buf, int len,
 375                                       void (*callback) (struct urb *))
 376 {
 377         struct urb *urb;
 378
 379         if (endpoint == -1)
 380                 return NULL;    /* endpoint not needed */
 381
 382         urb = usb_alloc_urb(0, GFP_KERNEL);     /* No ISO */
 383         if (urb == NULL) {
 384                 dbg("%s: alloc for endpoint %d failed.", __func__, endpoint);
 385                 return NULL;
 386         }
 387
 388         /* Fill URB using supplied data. */
 389         usb_fill_bulk_urb(urb, serial->dev,
 390                           usb_sndbulkpipe(serial->dev, endpoint) | dir,
 391                           buf, len, callback, ctx);
 392
 393         return urb;
 394 }
 395
 396 /* Setup urbs */
 397 static void usb_wwan_setup_urbs(struct usb_serial *serial)
 398 {
 399         int i, j;
 400         struct usb_serial_port *port;
 401         struct usb_wwan_port_private *portdata;
 402
 403         dbg("%s", __func__);
 404
 405         for (i = 0; i < serial->num_ports; i++) {
 406                 port = serial->port[i];
 407                 portdata = usb_get_serial_port_data(port);
 408
 409                 /* Do indat endpoints first */
 410                 for (j = 0; j < N_IN_URB; ++j) {
 411                         portdata->in_urbs[j] = usb_wwan_setup_urb(serial,
 412                                                                   port->
 413                                                                   bulk_in_endpointAddress,
 414                                                                   USB_DIR_IN,
 415                                                                   port,
 416                                                                   portdata->
 417                                                                   in_buffer[j],
 418                                                                   IN_BUFLEN,
 419                                                                   usb_wwan_indat_callback);
 420                 }
 421
 422                 /* outdat endpoints */
 423                 for (j = 0; j < N_OUT_URB; ++j) {
 424                         portdata->out_urbs[j] = usb_wwan_setup_urb(serial,
 425                                                                    port->
 426                                                                    bulk_out_endpointAddress,
 427                                                                    USB_DIR_OUT,
 428                                                                    port,
 429                                                                    portdata->
 430                                                                    out_buffer
 431                                                                    [j],
 432                                                                    OUT_BUFLEN,
 433                                                                    usb_wwan_outdat_callback);
 434                 }
 435         }
 436 }
 437
 438 int usb_wwan_startup(struct usb_serial *serial)
 439 {
 440         int i, j, err;
 441         struct usb_serial_port *port;
 442         struct usb_wwan_port_private *portdata;
 443         u8 *buffer;
 444
 445         dbg("%s", __func__);
 446
 447         /* Now setup per port private data */
 448         for (i = 0; i < serial->num_ports; i++) {
 449                 port = serial->port[i];
 450                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 451                 if (!portdata) {
 452                         dbg("%s: kmalloc for usb_wwan_port_private (%d) failed!.",
 453                             __func__, i);
 454                         return 1;
 455                 }
 456                 init_usb_anchor(&portdata->delayed);
 457
 458                 for (j = 0; j < N_IN_URB; j++) {
 459                         buffer = (u8 *) __get_free_page(GFP_KERNEL);
 460                         if (!buffer)
 461                                 goto bail_out_error;
 462                         portdata->in_buffer[j] = buffer;
 463                 }
 464
 465                 for (j = 0; j < N_OUT_URB; j++) {
 466                         buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
 467                         if (!buffer)
 468                                 goto bail_out_error2;
 469                         portdata->out_buffer[j] = buffer;
 470                 }
 471
 472                 usb_set_serial_port_data(port, portdata);
 473
 474                 if (!port->interrupt_in_urb)
 475                         continue;
 476                 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 477                 if (err)
 478                         dbg("%s: submit irq_in urb failed %d", __func__, err);
 479         }
 480         usb_wwan_setup_urbs(serial);
 481         return 0;
 482
 483 bail_out_error2:
 484         for (j = 0; j < N_OUT_URB; j++)
 485                 kfree(portdata->out_buffer[j]);
 486 bail_out_error:
 487         for (j = 0; j < N_IN_URB; j++)
 488                 if (portdata->in_buffer[j])
 489                         free_page((unsigned long)portdata->in_buffer[j]);
 490         kfree(portdata);
 491         return 1;
 492 }
 493 EXPORT_SYMBOL(usb_wwan_startup);
 494
 495 static void stop_read_write_urbs(struct usb_serial *serial)
 496 {
 497         int i, j;
 498         struct usb_serial_port *port;
 499         struct usb_wwan_port_private *portdata;
 500
 501         /* Stop reading/writing urbs */
 502         for (i = 0; i < serial->num_ports; ++i) {
 503                 port = serial->port[i];
 504                 portdata = usb_get_serial_port_data(port);
 505                 for (j = 0; j < N_IN_URB; j++)
 506                         usb_kill_urb(portdata->in_urbs[j]);
 507                 for (j = 0; j < N_OUT_URB; j++)
 508                         usb_kill_urb(portdata->out_urbs[j]);
 509         }
 510 }
 511
 512 void usb_wwan_disconnect(struct usb_serial *serial)
 513 {
 514         dbg("%s", __func__);
 515
 516         stop_read_write_urbs(serial);
 517 }
 518 EXPORT_SYMBOL(usb_wwan_disconnect);
 519
 520 void usb_wwan_release(struct usb_serial *serial)
 521 {
 522         int i, j;
 523         struct usb_serial_port *port;
 524         struct usb_wwan_port_private *portdata;
 525
 526         dbg("%s", __func__);
 527
 528         /* Now free them */
 529         for (i = 0; i < serial->num_ports; ++i) {
 530                 port = serial->port[i];
 531                 portdata = usb_get_serial_port_data(port);
 532
 533                 for (j = 0; j < N_IN_URB; j++) {
 534                         usb_free_urb(portdata->in_urbs[j]);
 535                         free_page((unsigned long)
 536                                   portdata->in_buffer[j]);
 537                         portdata->in_urbs[j] = NULL;
 538                 }
 539                 for (j = 0; j < N_OUT_URB; j++) {
 540                         usb_free_urb(portdata->out_urbs[j]);
 541                         kfree(portdata->out_buffer[j]);
 542                         portdata->out_urbs[j] = NULL;
 543                 }
 544         }
 545
 546         /* Now free per port private data */
 547         for (i = 0; i < serial->num_ports; i++) {
 548                 port = serial->port[i];
 549                 kfree(usb_get_serial_port_data(port));
 550         }
 551 }
 552 EXPORT_SYMBOL(usb_wwan_release);
 553
 554 #ifdef CONFIG_PM
 555 int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message)
 556 {
 557         struct usb_wwan_intf_private *intfdata = serial->private;
 558         int b;
 559
 560         dbg("%s entered", __func__);
 561
 562         if (message.event & PM_EVENT_AUTO) {
 563                 spin_lock_irq(&intfdata->susp_lock);
 564                 b = intfdata->in_flight;
 565                 spin_unlock_irq(&intfdata->susp_lock);
 566
 567                 if (b)
 568                         return -EBUSY;
 569         }
 570
 571         spin_lock_irq(&intfdata->susp_lock);
 572         intfdata->suspended = 1;
 573         spin_unlock_irq(&intfdata->susp_lock);
 574         stop_read_write_urbs(serial);
 575
 576         return 0;
 577 }
 578 EXPORT_SYMBOL(usb_wwan_suspend);
 579
 580 static void play_delayed(struct usb_serial_port *port)
 581 {
 582         struct usb_wwan_intf_private *data;
 583         struct usb_wwan_port_private *portdata;
 584         struct urb *urb;
 585         int err;
 586
 587         portdata = usb_get_serial_port_data(port);
 588         data = port->serial->private;
 589         while ((urb = usb_get_from_anchor(&portdata->delayed))) {
 590                 err = usb_submit_urb(urb, GFP_ATOMIC);
 591                 if (!err)
 592                         data->in_flight++;
 593         }
 594 }
 595
 596 int usb_wwan_resume(struct usb_serial *serial)
 597 {
 598         int i, j;
 599         struct usb_serial_port *port;
 600         struct usb_wwan_intf_private *intfdata = serial->private;
 601         struct usb_wwan_port_private *portdata;
 602         struct urb *urb;
 603         int err = 0;
 604
 605         dbg("%s entered", __func__);
 606         /* get the interrupt URBs resubmitted unconditionally */
 607         for (i = 0; i < serial->num_ports; i++) {
 608                 port = serial->port[i];
 609                 if (!port->interrupt_in_urb) {
 610                         dbg("%s: No interrupt URB for port %d", __func__, i);
 611                         continue;
 612                 }
 613                 err = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
 614                 dbg("Submitted interrupt URB for port %d (result %d)", i, err);
 615                 if (err < 0) {
 616                         err("%s: Error %d for interrupt URB of port%d",
 617                             __func__, err, i);
 618                         goto err_out;
 619                 }
 620         }
 621
 622         for (i = 0; i < serial->num_ports; i++) {
 623                 /* walk all ports */
 624                 port = serial->port[i];
 625                 portdata = usb_get_serial_port_data(port);
 626
 627                 /* skip closed ports */
 628                 spin_lock_irq(&intfdata->susp_lock);
 629                 if (!portdata->opened) {
 630                         spin_unlock_irq(&intfdata->susp_lock);
 631                         continue;
 632                 }
 633
 634                 for (j = 0; j < N_IN_URB; j++) {
 635                         urb = portdata->in_urbs[j];
 636                         err = usb_submit_urb(urb, GFP_ATOMIC);
 637                         if (err < 0) {
 638                                 err("%s: Error %d for bulk URB %d",
 639                                     __func__, err, i);
 640                                 spin_unlock_irq(&intfdata->susp_lock);
 641                                 goto err_out;
 642                         }
 643                 }
 644                 play_delayed(port);
 645                 spin_unlock_irq(&intfdata->susp_lock);
 646         }
 647         spin_lock_irq(&intfdata->susp_lock);
 648         intfdata->suspended = 0;
 649         spin_unlock_irq(&intfdata->susp_lock);
 650 err_out:
 651         return err;
 652 }
 653 EXPORT_SYMBOL(usb_wwan_resume);
 654 #endif
 655
 656 MODULE_AUTHOR(DRIVER_AUTHOR);
 657 MODULE_DESCRIPTION(DRIVER_DESC);
 658 MODULE_VERSION(DRIVER_VERSION);
 659 MODULE_LICENSE("GPL");
 660
 661 module_param(debug, bool, S_IRUGO | S_IWUSR);
 662 MODULE_PARM_DESC(debug, "Debug messages");