drivers/usb/serial/sierra.c

   1 /*
   2   USB Driver for Sierra Wireless
   3
   4   Copyright (C) 2006, 2007, 2008  Kevin Lloyd <klloyd@sierrawireless.com>,
   5
   6   Copyright (C) 2008, 2009  Elina Pasheva, Matthew Safar, Rory Filer
   7                         <linux@sierrawireless.com>
   8
   9   IMPORTANT DISCLAIMER: This driver is not commercially supported by
  10   Sierra Wireless. Use at your own risk.
  11
  12   This driver is free software; you can redistribute it and/or modify
  13   it under the terms of Version 2 of the GNU General Public License as
  14   published by the Free Software Foundation.
  15
  16   Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
  17   Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
  18 */
  19 /* Uncomment to log function calls */
  20 /* #define DEBUG */
  21 #define DRIVER_VERSION "v.1.7.16"
  22 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
  23 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
  24
  25 #include <linux/kernel.h>
  26 #include <linux/jiffies.h>
  27 #include <linux/errno.h>
  28 #include <linux/tty.h>
  29 #include <linux/slab.h>
  30 #include <linux/tty_flip.h>
  31 #include <linux/module.h>
  32 #include <linux/usb.h>
  33 #include <linux/usb/serial.h>
  34
  35 #define SWIMS_USB_REQUEST_SetPower      0x00
  36 #define SWIMS_USB_REQUEST_SetNmea       0x07
  37
  38 #define N_IN_URB_HM     8
  39 #define N_OUT_URB_HM    64
  40 #define N_IN_URB        4
  41 #define N_OUT_URB       4
  42 #define IN_BUFLEN       4096
  43
  44 #define MAX_TRANSFER            (PAGE_SIZE - 512)
  45 /* MAX_TRANSFER is chosen so that the VM is not stressed by
  46    allocations > PAGE_SIZE and the number of packets in a page
  47    is an integer 512 is the largest possible packet on EHCI */
  48
  49 static int debug;
  50 static int nmea;
  51
  52 /* Used in interface blacklisting */
  53 struct sierra_iface_info {
  54         const u32 infolen;      /* number of interface numbers on blacklist */
  55         const u8  *ifaceinfo;   /* pointer to the array holding the numbers */
  56 };
  57
  58 struct sierra_intf_private {
  59         spinlock_t susp_lock;
  60         unsigned int suspended:1;
  61         int in_flight;
  62         unsigned int open_ports;
  63 };
  64
  65 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
  66 {
  67         int result;
  68         dev_dbg(&udev->dev, "%s\n", __func__);
  69         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  70                         SWIMS_USB_REQUEST_SetPower,     /* __u8 request      */
  71                         USB_TYPE_VENDOR,                /* __u8 request type */
  72                         swiState,                       /* __u16 value       */
  73                         0,                              /* __u16 index       */
  74                         NULL,                           /* void *data        */
  75                         0,                              /* __u16 size        */
  76                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  77         return result;
  78 }
  79
  80 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
  81 {
  82         int result;
  83         dev_dbg(&udev->dev, "%s\n", __func__);
  84         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  85                         SWIMS_USB_REQUEST_SetNmea,      /* __u8 request      */
  86                         USB_TYPE_VENDOR,                /* __u8 request type */
  87                         enable,                         /* __u16 value       */
  88                         0x0000,                         /* __u16 index       */
  89                         NULL,                           /* void *data        */
  90                         0,                              /* __u16 size        */
  91                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  92         return result;
  93 }
  94
  95 static int sierra_calc_num_ports(struct usb_serial *serial)
  96 {
  97         int num_ports = 0;
  98         u8 ifnum, numendpoints;
  99
 100         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 101
 102         ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
 103         numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
 104
 105         /* Dummy interface present on some SKUs should be ignored */
 106         if (ifnum == 0x99)
 107                 num_ports = 0;
 108         else if (numendpoints <= 3)
 109                 num_ports = 1;
 110         else
 111                 num_ports = (numendpoints-1)/2;
 112         return num_ports;
 113 }
 114
 115 static int is_blacklisted(const u8 ifnum,
 116                                 const struct sierra_iface_info *blacklist)
 117 {
 118         const u8  *info;
 119         int i;
 120
 121         if (blacklist) {
 122                 info = blacklist->ifaceinfo;
 123
 124                 for (i = 0; i < blacklist->infolen; i++) {
 125                         if (info[i] == ifnum)
 126                                 return 1;
 127                 }
 128         }
 129         return 0;
 130 }
 131
 132 static int is_himemory(const u8 ifnum,
 133                                 const struct sierra_iface_info *himemorylist)
 134 {
 135         const u8  *info;
 136         int i;
 137
 138         if (himemorylist) {
 139                 info = himemorylist->ifaceinfo;
 140
 141                 for (i=0; i < himemorylist->infolen; i++) {
 142                         if (info[i] == ifnum)
 143                                 return 1;
 144                 }
 145         }
 146         return 0;
 147 }
 148
 149 static int sierra_calc_interface(struct usb_serial *serial)
 150 {
 151         int interface;
 152         struct usb_interface *p_interface;
 153         struct usb_host_interface *p_host_interface;
 154         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 155
 156         /* Get the interface structure pointer from the serial struct */
 157         p_interface = serial->interface;
 158
 159         /* Get a pointer to the host interface structure */
 160         p_host_interface = p_interface->cur_altsetting;
 161
 162         /* read the interface descriptor for this active altsetting
 163          * to find out the interface number we are on
 164         */
 165         interface = p_host_interface->desc.bInterfaceNumber;
 166
 167         return interface;
 168 }
 169
 170 static int sierra_probe(struct usb_serial *serial,
 171                         const struct usb_device_id *id)
 172 {
 173         int result = 0;
 174         struct usb_device *udev;
 175         u8 ifnum;
 176
 177         udev = serial->dev;
 178         dev_dbg(&udev->dev, "%s\n", __func__);
 179
 180         ifnum = sierra_calc_interface(serial);
 181         /*
 182          * If this interface supports more than 1 alternate
 183          * select the 2nd one
 184          */
 185         if (serial->interface->num_altsetting == 2) {
 186                 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
 187                         ifnum);
 188                 /* We know the alternate setting is 1 for the MC8785 */
 189                 usb_set_interface(udev, ifnum, 1);
 190         }
 191
 192         /* ifnum could have changed - by calling usb_set_interface */
 193         ifnum = sierra_calc_interface(serial);
 194
 195         if (is_blacklisted(ifnum,
 196                                 (struct sierra_iface_info *)id->driver_info)) {
 197                 dev_dbg(&serial->dev->dev,
 198                         "Ignoring blacklisted interface #%d\n", ifnum);
 199                 return -ENODEV;
 200         }
 201
 202         return result;
 203 }
 204
 205 /* interfaces with higher memory requirements */
 206 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
 207 static const struct sierra_iface_info typeA_interface_list = {
 208         .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
 209         .ifaceinfo = hi_memory_typeA_ifaces,
 210 };
 211
 212 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
 213 static const struct sierra_iface_info typeB_interface_list = {
 214         .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
 215         .ifaceinfo = hi_memory_typeB_ifaces,
 216 };
 217
 218 /* 'blacklist' of interfaces not served by this driver */
 219 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
 220 static const struct sierra_iface_info direct_ip_interface_blacklist = {
 221         .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
 222         .ifaceinfo = direct_ip_non_serial_ifaces,
 223 };
 224
 225 static const struct usb_device_id id_table[] = {
 226         { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
 227         { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
 228         { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
 229         { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
 230
 231         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
 232         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 233         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 234         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 235         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 236         { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
 237         { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
 238         { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
 239         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 240         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 241         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
 242         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
 243         { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
 244         /* Sierra Wireless C597 */
 245         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
 246         /* Sierra Wireless T598 */
 247         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
 248         { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
 249         { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
 250         { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
 251         { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
 252
 253         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 254         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 255         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 256         { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
 257         { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
 258         { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
 259         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 260         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
 261         { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
 262         { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
 263         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 264         { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
 265         { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
 266         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
 267         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
 268         { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
 269         { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
 270         { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
 271         { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
 272         { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
 273         { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
 274         /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
 275         { USB_DEVICE(0x1199, 0x683C) },
 276         { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
 277         /* Sierra Wireless MC8790, MC8791, MC8792 */
 278         { USB_DEVICE(0x1199, 0x683E) },
 279         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 280         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 281         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
 282         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
 283         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 284         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
 285         { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
 286         { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
 287         /* Sierra Wireless C885 */
 288         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
 289         /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
 290         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
 291         /* Sierra Wireless C22/C33 */
 292         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
 293         /* Sierra Wireless HSPA Non-Composite Device */
 294         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
 295         { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
 296         { USB_DEVICE(0x1199, 0x68A2),   /* Sierra Wireless MC77xx in QMI mode */
 297           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 298         },
 299         /* Sierra Wireless Direct IP modems */
 300         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68A3, 0xFF, 0xFF, 0xFF),
 301           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 302         },
 303         /* AT&T Direct IP LTE modems */
 304         { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
 305           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 306         },
 307         /* Airprime/Sierra Wireless Direct IP modems */
 308         { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
 309           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 310         },
 311
 312         { }
 313 };
 314 MODULE_DEVICE_TABLE(usb, id_table);
 315
 316
 317 struct sierra_port_private {
 318         spinlock_t lock;        /* lock the structure */
 319         int outstanding_urbs;   /* number of out urbs in flight */
 320         struct usb_anchor active;
 321         struct usb_anchor delayed;
 322
 323         int num_out_urbs;
 324         int num_in_urbs;
 325         /* Input endpoints and buffers for this port */
 326         struct urb *in_urbs[N_IN_URB_HM];
 327
 328         /* Settings for the port */
 329         int rts_state;  /* Handshaking pins (outputs) */
 330         int dtr_state;
 331         int cts_state;  /* Handshaking pins (inputs) */
 332         int dsr_state;
 333         int dcd_state;
 334         int ri_state;
 335         unsigned int opened:1;
 336 };
 337
 338 static int sierra_send_setup(struct usb_serial_port *port)
 339 {
 340         struct usb_serial *serial = port->serial;
 341         struct sierra_port_private *portdata;
 342         __u16 interface = 0;
 343         int val = 0;
 344         int do_send = 0;
 345         int retval;
 346
 347         dev_dbg(&port->dev, "%s\n", __func__);
 348
 349         portdata = usb_get_serial_port_data(port);
 350
 351         if (portdata->dtr_state)
 352                 val |= 0x01;
 353         if (portdata->rts_state)
 354                 val |= 0x02;
 355
 356         /* If composite device then properly report interface */
 357         if (serial->num_ports == 1) {
 358                 interface = sierra_calc_interface(serial);
 359                 /* Control message is sent only to interfaces with
 360                  * interrupt_in endpoints
 361                  */
 362                 if (port->interrupt_in_urb) {
 363                         /* send control message */
 364                         do_send = 1;
 365                 }
 366         }
 367
 368         /* Otherwise the need to do non-composite mapping */
 369         else {
 370                 if (port->bulk_out_endpointAddress == 2)
 371                         interface = 0;
 372                 else if (port->bulk_out_endpointAddress == 4)
 373                         interface = 1;
 374                 else if (port->bulk_out_endpointAddress == 5)
 375                         interface = 2;
 376
 377                 do_send = 1;
 378         }
 379         if (!do_send)
 380                 return 0;
 381
 382         retval = usb_autopm_get_interface(serial->interface);
 383         if (retval < 0)
 384                 return retval;
 385
 386         retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 387                 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
 388         usb_autopm_put_interface(serial->interface);
 389
 390         return retval;
 391 }
 392
 393 static void sierra_set_termios(struct tty_struct *tty,
 394                 struct usb_serial_port *port, struct ktermios *old_termios)
 395 {
 396         dev_dbg(&port->dev, "%s\n", __func__);
 397         tty_termios_copy_hw(tty->termios, old_termios);
 398         sierra_send_setup(port);
 399 }
 400
 401 static int sierra_tiocmget(struct tty_struct *tty)
 402 {
 403         struct usb_serial_port *port = tty->driver_data;
 404         unsigned int value;
 405         struct sierra_port_private *portdata;
 406
 407         dev_dbg(&port->dev, "%s\n", __func__);
 408         portdata = usb_get_serial_port_data(port);
 409
 410         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 411                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 412                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 413                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 414                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 415                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 416
 417         return value;
 418 }
 419
 420 static int sierra_tiocmset(struct tty_struct *tty,
 421                         unsigned int set, unsigned int clear)
 422 {
 423         struct usb_serial_port *port = tty->driver_data;
 424         struct sierra_port_private *portdata;
 425
 426         portdata = usb_get_serial_port_data(port);
 427
 428         if (set & TIOCM_RTS)
 429                 portdata->rts_state = 1;
 430         if (set & TIOCM_DTR)
 431                 portdata->dtr_state = 1;
 432
 433         if (clear & TIOCM_RTS)
 434                 portdata->rts_state = 0;
 435         if (clear & TIOCM_DTR)
 436                 portdata->dtr_state = 0;
 437         return sierra_send_setup(port);
 438 }
 439
 440 static void sierra_release_urb(struct urb *urb)
 441 {
 442         struct usb_serial_port *port;
 443         if (urb) {
 444                 port =  urb->context;
 445                 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
 446                 kfree(urb->transfer_buffer);
 447                 usb_free_urb(urb);
 448         }
 449 }
 450
 451 static void sierra_outdat_callback(struct urb *urb)
 452 {
 453         struct usb_serial_port *port = urb->context;
 454         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 455         struct sierra_intf_private *intfdata;
 456         int status = urb->status;
 457
 458         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 459         intfdata = port->serial->private;
 460
 461         /* free up the transfer buffer, as usb_free_urb() does not do this */
 462         kfree(urb->transfer_buffer);
 463         usb_autopm_put_interface_async(port->serial->interface);
 464         if (status)
 465                 dev_dbg(&port->dev, "%s - nonzero write bulk status "
 466                     "received: %d\n", __func__, status);
 467
 468         spin_lock(&portdata->lock);
 469         --portdata->outstanding_urbs;
 470         spin_unlock(&portdata->lock);
 471         spin_lock(&intfdata->susp_lock);
 472         --intfdata->in_flight;
 473         spin_unlock(&intfdata->susp_lock);
 474
 475         usb_serial_port_softint(port);
 476 }
 477
 478 /* Write */
 479 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 480                                         const unsigned char *buf, int count)
 481 {
 482         struct sierra_port_private *portdata;
 483         struct sierra_intf_private *intfdata;
 484         struct usb_serial *serial = port->serial;
 485         unsigned long flags;
 486         unsigned char *buffer;
 487         struct urb *urb;
 488         size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
 489         int retval = 0;
 490
 491         /* verify that we actually have some data to write */
 492         if (count == 0)
 493                 return 0;
 494
 495         portdata = usb_get_serial_port_data(port);
 496         intfdata = serial->private;
 497
 498         dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
 499         spin_lock_irqsave(&portdata->lock, flags);
 500         dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
 501                 portdata->outstanding_urbs);
 502         if (portdata->outstanding_urbs > portdata->num_out_urbs) {
 503                 spin_unlock_irqrestore(&portdata->lock, flags);
 504                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 505                 return 0;
 506         }
 507         portdata->outstanding_urbs++;
 508         dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
 509                 portdata->outstanding_urbs);
 510         spin_unlock_irqrestore(&portdata->lock, flags);
 511
 512         retval = usb_autopm_get_interface_async(serial->interface);
 513         if (retval < 0) {
 514                 spin_lock_irqsave(&portdata->lock, flags);
 515                 portdata->outstanding_urbs--;
 516                 spin_unlock_irqrestore(&portdata->lock, flags);
 517                 goto error_simple;
 518         }
 519
 520         buffer = kmalloc(writesize, GFP_ATOMIC);
 521         if (!buffer) {
 522                 dev_err(&port->dev, "out of memory\n");
 523                 retval = -ENOMEM;
 524                 goto error_no_buffer;
 525         }
 526
 527         urb = usb_alloc_urb(0, GFP_ATOMIC);
 528         if (!urb) {
 529                 dev_err(&port->dev, "no more free urbs\n");
 530                 retval = -ENOMEM;
 531                 goto error_no_urb;
 532         }
 533
 534         memcpy(buffer, buf, writesize);
 535
 536         usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
 537
 538         usb_fill_bulk_urb(urb, serial->dev,
 539                           usb_sndbulkpipe(serial->dev,
 540                                           port->bulk_out_endpointAddress),
 541                           buffer, writesize, sierra_outdat_callback, port);
 542
 543         /* Handle the need to send a zero length packet */
 544         urb->transfer_flags |= URB_ZERO_PACKET;
 545
 546         spin_lock_irqsave(&intfdata->susp_lock, flags);
 547
 548         if (intfdata->suspended) {
 549                 usb_anchor_urb(urb, &portdata->delayed);
 550                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 551                 goto skip_power;
 552         } else {
 553                 usb_anchor_urb(urb, &portdata->active);
 554         }
 555         /* send it down the pipe */
 556         retval = usb_submit_urb(urb, GFP_ATOMIC);
 557         if (retval) {
 558                 usb_unanchor_urb(urb);
 559                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 560                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 561                         "with status = %d\n", __func__, retval);
 562                 goto error;
 563         } else {
 564                 intfdata->in_flight++;
 565                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 566         }
 567
 568 skip_power:
 569         /* we are done with this urb, so let the host driver
 570          * really free it when it is finished with it */
 571         usb_free_urb(urb);
 572
 573         return writesize;
 574 error:
 575         usb_free_urb(urb);
 576 error_no_urb:
 577         kfree(buffer);
 578 error_no_buffer:
 579         spin_lock_irqsave(&portdata->lock, flags);
 580         --portdata->outstanding_urbs;
 581         dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
 582                 portdata->outstanding_urbs);
 583         spin_unlock_irqrestore(&portdata->lock, flags);
 584         usb_autopm_put_interface_async(serial->interface);
 585 error_simple:
 586         return retval;
 587 }
 588
 589 static void sierra_indat_callback(struct urb *urb)
 590 {
 591         int err;
 592         int endpoint;
 593         struct usb_serial_port *port;
 594         struct tty_struct *tty;
 595         unsigned char *data = urb->transfer_buffer;
 596         int status = urb->status;
 597
 598         endpoint = usb_pipeendpoint(urb->pipe);
 599         port = urb->context;
 600
 601         dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
 602
 603         if (status) {
 604                 dev_dbg(&port->dev, "%s: nonzero status: %d on"
 605                         " endpoint %02x\n", __func__, status, endpoint);
 606         } else {
 607                 if (urb->actual_length) {
 608                         tty = tty_port_tty_get(&port->port);
 609                         if (tty) {
 610                                 tty_insert_flip_string(tty, data,
 611                                         urb->actual_length);
 612                                 tty_flip_buffer_push(tty);
 613
 614                                 tty_kref_put(tty);
 615                                 usb_serial_debug_data(debug, &port->dev,
 616                                         __func__, urb->actual_length, data);
 617                         }
 618                 } else {
 619                         dev_dbg(&port->dev, "%s: empty read urb"
 620                                 " received\n", __func__);
 621                 }
 622         }
 623
 624         /* Resubmit urb so we continue receiving */
 625         if (status != -ESHUTDOWN && status != -EPERM) {
 626                 usb_mark_last_busy(port->serial->dev);
 627                 err = usb_submit_urb(urb, GFP_ATOMIC);
 628                 if (err && err != -EPERM)
 629                         dev_err(&port->dev, "resubmit read urb failed."
 630                                 "(%d)\n", err);
 631         }
 632 }
 633
 634 static void sierra_instat_callback(struct urb *urb)
 635 {
 636         int err;
 637         int status = urb->status;
 638         struct usb_serial_port *port =  urb->context;
 639         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 640         struct usb_serial *serial = port->serial;
 641
 642         dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
 643                 urb, port, portdata);
 644
 645         if (status == 0) {
 646                 struct usb_ctrlrequest *req_pkt =
 647                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 648
 649                 if (!req_pkt) {
 650                         dev_dbg(&port->dev, "%s: NULL req_pkt\n",
 651                                 __func__);
 652                         return;
 653                 }
 654                 if ((req_pkt->bRequestType == 0xA1) &&
 655                                 (req_pkt->bRequest == 0x20)) {
 656                         int old_dcd_state;
 657                         unsigned char signals = *((unsigned char *)
 658                                         urb->transfer_buffer +
 659                                         sizeof(struct usb_ctrlrequest));
 660                         struct tty_struct *tty;
 661
 662                         dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
 663                                 signals);
 664
 665                         old_dcd_state = portdata->dcd_state;
 666                         portdata->cts_state = 1;
 667                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 668                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 669                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 670
 671                         tty = tty_port_tty_get(&port->port);
 672                         if (tty && !C_CLOCAL(tty) &&
 673                                         old_dcd_state && !portdata->dcd_state)
 674                                 tty_hangup(tty);
 675                         tty_kref_put(tty);
 676                 } else {
 677                         dev_dbg(&port->dev, "%s: type %x req %x\n",
 678                                 __func__, req_pkt->bRequestType,
 679                                 req_pkt->bRequest);
 680                 }
 681         } else
 682                 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
 683
 684         /* Resubmit urb so we continue receiving IRQ data */
 685         if (status != -ESHUTDOWN && status != -ENOENT) {
 686                 usb_mark_last_busy(serial->dev);
 687                 urb->dev = serial->dev;
 688                 err = usb_submit_urb(urb, GFP_ATOMIC);
 689                 if (err && err != -EPERM)
 690                         dev_err(&port->dev, "%s: resubmit intr urb "
 691                                 "failed. (%d)\n", __func__, err);
 692         }
 693 }
 694
 695 static int sierra_write_room(struct tty_struct *tty)
 696 {
 697         struct usb_serial_port *port = tty->driver_data;
 698         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 699         unsigned long flags;
 700
 701         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 702
 703         /* try to give a good number back based on if we have any free urbs at
 704          * this point in time */
 705         spin_lock_irqsave(&portdata->lock, flags);
 706         if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
 707                 spin_unlock_irqrestore(&portdata->lock, flags);
 708                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 709                 return 0;
 710         }
 711         spin_unlock_irqrestore(&portdata->lock, flags);
 712
 713         return 2048;
 714 }
 715
 716 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
 717 {
 718         int i;
 719         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 720
 721         for (i = 0; i < portdata->num_in_urbs; i++)
 722                 usb_kill_urb(portdata->in_urbs[i]);
 723
 724         usb_kill_urb(port->interrupt_in_urb);
 725 }
 726
 727 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
 728 {
 729         int ok_cnt;
 730         int err = -EINVAL;
 731         int i;
 732         struct urb *urb;
 733         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 734
 735         ok_cnt = 0;
 736         for (i = 0; i < portdata->num_in_urbs; i++) {
 737                 urb = portdata->in_urbs[i];
 738                 if (!urb)
 739                         continue;
 740                 err = usb_submit_urb(urb, mem_flags);
 741                 if (err) {
 742                         dev_err(&port->dev, "%s: submit urb failed: %d\n",
 743                                 __func__, err);
 744                 } else {
 745                         ok_cnt++;
 746                 }
 747         }
 748
 749         if (ok_cnt && port->interrupt_in_urb) {
 750                 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
 751                 if (err) {
 752                         dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
 753                                 __func__, err);
 754                 }
 755         }
 756
 757         if (ok_cnt > 0) /* at least one rx urb submitted */
 758                 return 0;
 759         else
 760                 return err;
 761 }
 762
 763 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
 764                                         int dir, void *ctx, int len,
 765                                         gfp_t mem_flags,
 766                                         usb_complete_t callback)
 767 {
 768         struct urb      *urb;
 769         u8              *buf;
 770
 771         if (endpoint == -1)
 772                 return NULL;
 773
 774         urb = usb_alloc_urb(0, mem_flags);
 775         if (urb == NULL) {
 776                 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
 777                         __func__, endpoint);
 778                 return NULL;
 779         }
 780
 781         buf = kmalloc(len, mem_flags);
 782         if (buf) {
 783                 /* Fill URB using supplied data */
 784                 usb_fill_bulk_urb(urb, serial->dev,
 785                         usb_sndbulkpipe(serial->dev, endpoint) | dir,
 786                         buf, len, callback, ctx);
 787
 788                 /* debug */
 789                 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
 790                                 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
 791         } else {
 792                 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
 793                                 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
 794
 795                 sierra_release_urb(urb);
 796                 urb = NULL;
 797         }
 798
 799         return urb;
 800 }
 801
 802 static void sierra_close(struct usb_serial_port *port)
 803 {
 804         int i;
 805         struct usb_serial *serial = port->serial;
 806         struct sierra_port_private *portdata;
 807         struct sierra_intf_private *intfdata = port->serial->private;
 808         struct urb *urb;
 809
 810
 811         dev_dbg(&port->dev, "%s\n", __func__);
 812         portdata = usb_get_serial_port_data(port);
 813
 814         portdata->rts_state = 0;
 815         portdata->dtr_state = 0;
 816
 817         if (serial->dev) {
 818                 mutex_lock(&serial->disc_mutex);
 819                 if (!serial->disconnected) {
 820                         /* odd error handling due to pm counters */
 821                         if (!usb_autopm_get_interface(serial->interface))
 822                                 sierra_send_setup(port);
 823                         else
 824                                 usb_autopm_get_interface_no_resume(serial->interface);
 825
 826                 }
 827                 mutex_unlock(&serial->disc_mutex);
 828                 spin_lock_irq(&intfdata->susp_lock);
 829                 portdata->opened = 0;
 830                 if (--intfdata->open_ports == 0)
 831                         serial->interface->needs_remote_wakeup = 0;
 832                 spin_unlock_irq(&intfdata->susp_lock);
 833
 834                 for (;;) {
 835                         urb = usb_get_from_anchor(&portdata->delayed);
 836                         if (!urb)
 837                                 break;
 838                         kfree(urb->transfer_buffer);
 839                         usb_free_urb(urb);
 840                         usb_autopm_put_interface_async(serial->interface);
 841                         spin_lock(&portdata->lock);
 842                         portdata->outstanding_urbs--;
 843                         spin_unlock(&portdata->lock);
 844                 }
 845
 846                 /* Stop reading urbs */
 847                 sierra_stop_rx_urbs(port);
 848                 /* .. and release them */
 849                 for (i = 0; i < portdata->num_in_urbs; i++) {
 850                         sierra_release_urb(portdata->in_urbs[i]);
 851                         portdata->in_urbs[i] = NULL;
 852                 }
 853         }
 854 }
 855
 856 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
 857 {
 858         struct sierra_port_private *portdata;
 859         struct usb_serial *serial = port->serial;
 860         struct sierra_intf_private *intfdata = serial->private;
 861         int i;
 862         int err;
 863         int endpoint;
 864         struct urb *urb;
 865
 866         portdata = usb_get_serial_port_data(port);
 867
 868         dev_dbg(&port->dev, "%s\n", __func__);
 869
 870         /* Set some sane defaults */
 871         portdata->rts_state = 1;
 872         portdata->dtr_state = 1;
 873
 874
 875         endpoint = port->bulk_in_endpointAddress;
 876         for (i = 0; i < portdata->num_in_urbs; i++) {
 877                 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
 878                                         IN_BUFLEN, GFP_KERNEL,
 879                                         sierra_indat_callback);
 880                 portdata->in_urbs[i] = urb;
 881         }
 882         /* clear halt condition */
 883         usb_clear_halt(serial->dev,
 884                         usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
 885
 886         err = sierra_submit_rx_urbs(port, GFP_KERNEL);
 887         if (err)
 888                 goto err_submit;
 889
 890         sierra_send_setup(port);
 891
 892         spin_lock_irq(&intfdata->susp_lock);
 893         portdata->opened = 1;
 894         if (++intfdata->open_ports == 1)
 895                 serial->interface->needs_remote_wakeup = 1;
 896         spin_unlock_irq(&intfdata->susp_lock);
 897         usb_autopm_put_interface(serial->interface);
 898
 899         return 0;
 900
 901 err_submit:
 902         sierra_stop_rx_urbs(port);
 903
 904         for (i = 0; i < portdata->num_in_urbs; i++) {
 905                 sierra_release_urb(portdata->in_urbs[i]);
 906                 portdata->in_urbs[i] = NULL;
 907         }
 908
 909         return err;
 910 }
 911
 912
 913 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
 914 {
 915         struct sierra_port_private *portdata;
 916
 917         portdata = usb_get_serial_port_data(port);
 918         portdata->rts_state = on;
 919         portdata->dtr_state = on;
 920
 921         sierra_send_setup(port);
 922 }
 923
 924 static int sierra_startup(struct usb_serial *serial)
 925 {
 926         struct usb_serial_port *port;
 927         struct sierra_intf_private *intfdata;
 928         struct sierra_port_private *portdata;
 929         struct sierra_iface_info *himemoryp = NULL;
 930         int i;
 931         u8 ifnum;
 932
 933         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 934
 935         intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
 936         if (!intfdata)
 937                 return -ENOMEM;
 938
 939         spin_lock_init(&intfdata->susp_lock);
 940
 941         usb_set_serial_data(serial, intfdata);
 942
 943         /* Set Device mode to D0 */
 944         sierra_set_power_state(serial->dev, 0x0000);
 945
 946         /* Check NMEA and set */
 947         if (nmea)
 948                 sierra_vsc_set_nmea(serial->dev, 1);
 949
 950         /* Now setup per port private data */
 951         for (i = 0; i < serial->num_ports; i++) {
 952                 port = serial->port[i];
 953                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 954                 if (!portdata) {
 955                         dev_dbg(&port->dev, "%s: kmalloc for "
 956                                 "sierra_port_private (%d) failed!\n",
 957                                 __func__, i);
 958                         goto err;
 959                 }
 960                 spin_lock_init(&portdata->lock);
 961                 init_usb_anchor(&portdata->active);
 962                 init_usb_anchor(&portdata->delayed);
 963                 ifnum = i;
 964                 /* Assume low memory requirements */
 965                 portdata->num_out_urbs = N_OUT_URB;
 966                 portdata->num_in_urbs  = N_IN_URB;
 967
 968                 /* Determine actual memory requirements */
 969                 if (serial->num_ports == 1) {
 970                         /* Get interface number for composite device */
 971                         ifnum = sierra_calc_interface(serial);
 972                         himemoryp =
 973                             (struct sierra_iface_info *)&typeB_interface_list;
 974                         if (is_himemory(ifnum, himemoryp)) {
 975                                 portdata->num_out_urbs = N_OUT_URB_HM;
 976                                 portdata->num_in_urbs  = N_IN_URB_HM;
 977                         }
 978                 }
 979                 else {
 980                         himemoryp =
 981                             (struct sierra_iface_info *)&typeA_interface_list;
 982                         if (is_himemory(i, himemoryp)) {
 983                                 portdata->num_out_urbs = N_OUT_URB_HM;
 984                                 portdata->num_in_urbs  = N_IN_URB_HM;
 985                         }
 986                 }
 987                 dev_dbg(&serial->dev->dev,
 988                         "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
 989                         ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
 990                 /* Set the port private data pointer */
 991                 usb_set_serial_port_data(port, portdata);
 992         }
 993
 994         return 0;
 995 err:
 996         for (--i; i >= 0; --i) {
 997                 portdata = usb_get_serial_port_data(serial->port[i]);
 998                 kfree(portdata);
 999         }
1000         kfree(intfdata);
1001
1002         return -ENOMEM;
1003 }
1004
1005 static void sierra_release(struct usb_serial *serial)
1006 {
1007         int i;
1008         struct usb_serial_port *port;
1009         struct sierra_port_private *portdata;
1010
1011         dev_dbg(&serial->dev->dev, "%s\n", __func__);
1012
1013         for (i = 0; i < serial->num_ports; ++i) {
1014                 port = serial->port[i];
1015                 if (!port)
1016                         continue;
1017                 portdata = usb_get_serial_port_data(port);
1018                 if (!portdata)
1019                         continue;
1020                 kfree(portdata);
1021         }
1022         kfree(serial->private);
1023 }
1024
1025 #ifdef CONFIG_PM
1026 static void stop_read_write_urbs(struct usb_serial *serial)
1027 {
1028         int i;
1029         struct usb_serial_port *port;
1030         struct sierra_port_private *portdata;
1031
1032         /* Stop reading/writing urbs */
1033         for (i = 0; i < serial->num_ports; ++i) {
1034                 port = serial->port[i];
1035                 portdata = usb_get_serial_port_data(port);
1036                 sierra_stop_rx_urbs(port);
1037                 usb_kill_anchored_urbs(&portdata->active);
1038         }
1039 }
1040
1041 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
1042 {
1043         struct sierra_intf_private *intfdata;
1044         int b;
1045
1046         if (PMSG_IS_AUTO(message)) {
1047                 intfdata = serial->private;
1048                 spin_lock_irq(&intfdata->susp_lock);
1049                 b = intfdata->in_flight;
1050
1051                 if (b) {
1052                         spin_unlock_irq(&intfdata->susp_lock);
1053                         return -EBUSY;
1054                 } else {
1055                         intfdata->suspended = 1;
1056                         spin_unlock_irq(&intfdata->susp_lock);
1057                 }
1058         }
1059         stop_read_write_urbs(serial);
1060
1061         return 0;
1062 }
1063
1064 static int sierra_resume(struct usb_serial *serial)
1065 {
1066         struct usb_serial_port *port;
1067         struct sierra_intf_private *intfdata = serial->private;
1068         struct sierra_port_private *portdata;
1069         struct urb *urb;
1070         int ec = 0;
1071         int i, err;
1072
1073         spin_lock_irq(&intfdata->susp_lock);
1074         for (i = 0; i < serial->num_ports; i++) {
1075                 port = serial->port[i];
1076                 portdata = usb_get_serial_port_data(port);
1077
1078                 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1079                         usb_anchor_urb(urb, &portdata->active);
1080                         intfdata->in_flight++;
1081                         err = usb_submit_urb(urb, GFP_ATOMIC);
1082                         if (err < 0) {
1083                                 intfdata->in_flight--;
1084                                 usb_unanchor_urb(urb);
1085                                 kfree(urb->transfer_buffer);
1086                                 usb_free_urb(urb);
1087                                 spin_lock(&portdata->lock);
1088                                 portdata->outstanding_urbs--;
1089                                 spin_unlock(&portdata->lock);
1090                                 continue;
1091                         }
1092                 }
1093
1094                 if (portdata->opened) {
1095                         err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1096                         if (err)
1097                                 ec++;
1098                 }
1099         }
1100         intfdata->suspended = 0;
1101         spin_unlock_irq(&intfdata->susp_lock);
1102
1103         return ec ? -EIO : 0;
1104 }
1105
1106 static int sierra_reset_resume(struct usb_interface *intf)
1107 {
1108         struct usb_serial *serial = usb_get_intfdata(intf);
1109         dev_err(&serial->dev->dev, "%s\n", __func__);
1110         return usb_serial_resume(intf);
1111 }
1112 #else
1113 #define sierra_suspend NULL
1114 #define sierra_resume NULL
1115 #define sierra_reset_resume NULL
1116 #endif
1117
1118 static struct usb_driver sierra_driver = {
1119         .name       = "sierra",
1120         .probe      = usb_serial_probe,
1121         .disconnect = usb_serial_disconnect,
1122         .suspend    = usb_serial_suspend,
1123         .resume     = usb_serial_resume,
1124         .reset_resume = sierra_reset_resume,
1125         .id_table   = id_table,
1126         .no_dynamic_id =        1,
1127         .supports_autosuspend = 1,
1128 };
1129
1130 static struct usb_serial_driver sierra_device = {
1131         .driver = {
1132                 .owner =        THIS_MODULE,
1133                 .name =         "sierra",
1134         },
1135         .description       = "Sierra USB modem",
1136         .id_table          = id_table,
1137         .usb_driver        = &sierra_driver,
1138         .calc_num_ports    = sierra_calc_num_ports,
1139         .probe             = sierra_probe,
1140         .open              = sierra_open,
1141         .close             = sierra_close,
1142         .dtr_rts           = sierra_dtr_rts,
1143         .write             = sierra_write,
1144         .write_room        = sierra_write_room,
1145         .set_termios       = sierra_set_termios,
1146         .tiocmget          = sierra_tiocmget,
1147         .tiocmset          = sierra_tiocmset,
1148         .attach            = sierra_startup,
1149         .release           = sierra_release,
1150         .suspend           = sierra_suspend,
1151         .resume            = sierra_resume,
1152         .read_int_callback = sierra_instat_callback,
1153 };
1154
1155 /* Functions used by new usb-serial code. */
1156 static int __init sierra_init(void)
1157 {
1158         int retval;
1159         retval = usb_serial_register(&sierra_device);
1160         if (retval)
1161                 goto failed_device_register;
1162
1163
1164         retval = usb_register(&sierra_driver);
1165         if (retval)
1166                 goto failed_driver_register;
1167
1168         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1169                DRIVER_DESC "\n");
1170
1171         return 0;
1172
1173 failed_driver_register:
1174         usb_serial_deregister(&sierra_device);
1175 failed_device_register:
1176         return retval;
1177 }
1178
1179 static void __exit sierra_exit(void)
1180 {
1181         usb_deregister(&sierra_driver);
1182         usb_serial_deregister(&sierra_device);
1183 }
1184
1185 module_init(sierra_init);
1186 module_exit(sierra_exit);
1187
1188 MODULE_AUTHOR(DRIVER_AUTHOR);
1189 MODULE_DESCRIPTION(DRIVER_DESC);
1190 MODULE_VERSION(DRIVER_VERSION);
1191 MODULE_LICENSE("GPL");
1192
1193 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1194 MODULE_PARM_DESC(nmea, "NMEA streaming");
1195
1196 module_param(debug, bool, S_IRUGO | S_IWUSR);
1197 MODULE_PARM_DESC(debug, "Debug messages");