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         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF),
 304           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 305         },
 306         /* AT&T Direct IP LTE modems */
 307         { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
 308           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 309         },
 310         /* Airprime/Sierra Wireless Direct IP modems */
 311         { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
 312           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 313         },
 314
 315         { }
 316 };
 317 MODULE_DEVICE_TABLE(usb, id_table);
 318
 319
 320 struct sierra_port_private {
 321         spinlock_t lock;        /* lock the structure */
 322         int outstanding_urbs;   /* number of out urbs in flight */
 323         struct usb_anchor active;
 324         struct usb_anchor delayed;
 325
 326         int num_out_urbs;
 327         int num_in_urbs;
 328         /* Input endpoints and buffers for this port */
 329         struct urb *in_urbs[N_IN_URB_HM];
 330
 331         /* Settings for the port */
 332         int rts_state;  /* Handshaking pins (outputs) */
 333         int dtr_state;
 334         int cts_state;  /* Handshaking pins (inputs) */
 335         int dsr_state;
 336         int dcd_state;
 337         int ri_state;
 338         unsigned int opened:1;
 339 };
 340
 341 static int sierra_send_setup(struct usb_serial_port *port)
 342 {
 343         struct usb_serial *serial = port->serial;
 344         struct sierra_port_private *portdata;
 345         __u16 interface = 0;
 346         int val = 0;
 347         int do_send = 0;
 348         int retval;
 349
 350         dev_dbg(&port->dev, "%s\n", __func__);
 351
 352         portdata = usb_get_serial_port_data(port);
 353
 354         if (portdata->dtr_state)
 355                 val |= 0x01;
 356         if (portdata->rts_state)
 357                 val |= 0x02;
 358
 359         /* If composite device then properly report interface */
 360         if (serial->num_ports == 1) {
 361                 interface = sierra_calc_interface(serial);
 362                 /* Control message is sent only to interfaces with
 363                  * interrupt_in endpoints
 364                  */
 365                 if (port->interrupt_in_urb) {
 366                         /* send control message */
 367                         do_send = 1;
 368                 }
 369         }
 370
 371         /* Otherwise the need to do non-composite mapping */
 372         else {
 373                 if (port->bulk_out_endpointAddress == 2)
 374                         interface = 0;
 375                 else if (port->bulk_out_endpointAddress == 4)
 376                         interface = 1;
 377                 else if (port->bulk_out_endpointAddress == 5)
 378                         interface = 2;
 379
 380                 do_send = 1;
 381         }
 382         if (!do_send)
 383                 return 0;
 384
 385         retval = usb_autopm_get_interface(serial->interface);
 386         if (retval < 0)
 387                 return retval;
 388
 389         retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 390                 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
 391         usb_autopm_put_interface(serial->interface);
 392
 393         return retval;
 394 }
 395
 396 static void sierra_set_termios(struct tty_struct *tty,
 397                 struct usb_serial_port *port, struct ktermios *old_termios)
 398 {
 399         dev_dbg(&port->dev, "%s\n", __func__);
 400         tty_termios_copy_hw(tty->termios, old_termios);
 401         sierra_send_setup(port);
 402 }
 403
 404 static int sierra_tiocmget(struct tty_struct *tty)
 405 {
 406         struct usb_serial_port *port = tty->driver_data;
 407         unsigned int value;
 408         struct sierra_port_private *portdata;
 409
 410         dev_dbg(&port->dev, "%s\n", __func__);
 411         portdata = usb_get_serial_port_data(port);
 412
 413         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 414                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 415                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 416                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 417                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 418                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 419
 420         return value;
 421 }
 422
 423 static int sierra_tiocmset(struct tty_struct *tty,
 424                         unsigned int set, unsigned int clear)
 425 {
 426         struct usb_serial_port *port = tty->driver_data;
 427         struct sierra_port_private *portdata;
 428
 429         portdata = usb_get_serial_port_data(port);
 430
 431         if (set & TIOCM_RTS)
 432                 portdata->rts_state = 1;
 433         if (set & TIOCM_DTR)
 434                 portdata->dtr_state = 1;
 435
 436         if (clear & TIOCM_RTS)
 437                 portdata->rts_state = 0;
 438         if (clear & TIOCM_DTR)
 439                 portdata->dtr_state = 0;
 440         return sierra_send_setup(port);
 441 }
 442
 443 static void sierra_release_urb(struct urb *urb)
 444 {
 445         struct usb_serial_port *port;
 446         if (urb) {
 447                 port =  urb->context;
 448                 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
 449                 kfree(urb->transfer_buffer);
 450                 usb_free_urb(urb);
 451         }
 452 }
 453
 454 static void sierra_outdat_callback(struct urb *urb)
 455 {
 456         struct usb_serial_port *port = urb->context;
 457         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 458         struct sierra_intf_private *intfdata;
 459         int status = urb->status;
 460
 461         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 462         intfdata = port->serial->private;
 463
 464         /* free up the transfer buffer, as usb_free_urb() does not do this */
 465         kfree(urb->transfer_buffer);
 466         usb_autopm_put_interface_async(port->serial->interface);
 467         if (status)
 468                 dev_dbg(&port->dev, "%s - nonzero write bulk status "
 469                     "received: %d\n", __func__, status);
 470
 471         spin_lock(&portdata->lock);
 472         --portdata->outstanding_urbs;
 473         spin_unlock(&portdata->lock);
 474         spin_lock(&intfdata->susp_lock);
 475         --intfdata->in_flight;
 476         spin_unlock(&intfdata->susp_lock);
 477
 478         usb_serial_port_softint(port);
 479 }
 480
 481 /* Write */
 482 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 483                                         const unsigned char *buf, int count)
 484 {
 485         struct sierra_port_private *portdata;
 486         struct sierra_intf_private *intfdata;
 487         struct usb_serial *serial = port->serial;
 488         unsigned long flags;
 489         unsigned char *buffer;
 490         struct urb *urb;
 491         size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
 492         int retval = 0;
 493
 494         /* verify that we actually have some data to write */
 495         if (count == 0)
 496                 return 0;
 497
 498         portdata = usb_get_serial_port_data(port);
 499         intfdata = serial->private;
 500
 501         dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
 502         spin_lock_irqsave(&portdata->lock, flags);
 503         dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
 504                 portdata->outstanding_urbs);
 505         if (portdata->outstanding_urbs > portdata->num_out_urbs) {
 506                 spin_unlock_irqrestore(&portdata->lock, flags);
 507                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 508                 return 0;
 509         }
 510         portdata->outstanding_urbs++;
 511         dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
 512                 portdata->outstanding_urbs);
 513         spin_unlock_irqrestore(&portdata->lock, flags);
 514
 515         retval = usb_autopm_get_interface_async(serial->interface);
 516         if (retval < 0) {
 517                 spin_lock_irqsave(&portdata->lock, flags);
 518                 portdata->outstanding_urbs--;
 519                 spin_unlock_irqrestore(&portdata->lock, flags);
 520                 goto error_simple;
 521         }
 522
 523         buffer = kmalloc(writesize, GFP_ATOMIC);
 524         if (!buffer) {
 525                 dev_err(&port->dev, "out of memory\n");
 526                 retval = -ENOMEM;
 527                 goto error_no_buffer;
 528         }
 529
 530         urb = usb_alloc_urb(0, GFP_ATOMIC);
 531         if (!urb) {
 532                 dev_err(&port->dev, "no more free urbs\n");
 533                 retval = -ENOMEM;
 534                 goto error_no_urb;
 535         }
 536
 537         memcpy(buffer, buf, writesize);
 538
 539         usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
 540
 541         usb_fill_bulk_urb(urb, serial->dev,
 542                           usb_sndbulkpipe(serial->dev,
 543                                           port->bulk_out_endpointAddress),
 544                           buffer, writesize, sierra_outdat_callback, port);
 545
 546         /* Handle the need to send a zero length packet */
 547         urb->transfer_flags |= URB_ZERO_PACKET;
 548
 549         spin_lock_irqsave(&intfdata->susp_lock, flags);
 550
 551         if (intfdata->suspended) {
 552                 usb_anchor_urb(urb, &portdata->delayed);
 553                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 554                 goto skip_power;
 555         } else {
 556                 usb_anchor_urb(urb, &portdata->active);
 557         }
 558         /* send it down the pipe */
 559         retval = usb_submit_urb(urb, GFP_ATOMIC);
 560         if (retval) {
 561                 usb_unanchor_urb(urb);
 562                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 563                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 564                         "with status = %d\n", __func__, retval);
 565                 goto error;
 566         } else {
 567                 intfdata->in_flight++;
 568                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 569         }
 570
 571 skip_power:
 572         /* we are done with this urb, so let the host driver
 573          * really free it when it is finished with it */
 574         usb_free_urb(urb);
 575
 576         return writesize;
 577 error:
 578         usb_free_urb(urb);
 579 error_no_urb:
 580         kfree(buffer);
 581 error_no_buffer:
 582         spin_lock_irqsave(&portdata->lock, flags);
 583         --portdata->outstanding_urbs;
 584         dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
 585                 portdata->outstanding_urbs);
 586         spin_unlock_irqrestore(&portdata->lock, flags);
 587         usb_autopm_put_interface_async(serial->interface);
 588 error_simple:
 589         return retval;
 590 }
 591
 592 static void sierra_indat_callback(struct urb *urb)
 593 {
 594         int err;
 595         int endpoint;
 596         struct usb_serial_port *port;
 597         struct tty_struct *tty;
 598         unsigned char *data = urb->transfer_buffer;
 599         int status = urb->status;
 600
 601         endpoint = usb_pipeendpoint(urb->pipe);
 602         port = urb->context;
 603
 604         dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
 605
 606         if (status) {
 607                 dev_dbg(&port->dev, "%s: nonzero status: %d on"
 608                         " endpoint %02x\n", __func__, status, endpoint);
 609         } else {
 610                 if (urb->actual_length) {
 611                         tty = tty_port_tty_get(&port->port);
 612                         if (tty) {
 613                                 tty_insert_flip_string(tty, data,
 614                                         urb->actual_length);
 615                                 tty_flip_buffer_push(tty);
 616
 617                                 tty_kref_put(tty);
 618                                 usb_serial_debug_data(debug, &port->dev,
 619                                         __func__, urb->actual_length, data);
 620                         }
 621                 } else {
 622                         dev_dbg(&port->dev, "%s: empty read urb"
 623                                 " received\n", __func__);
 624                 }
 625         }
 626
 627         /* Resubmit urb so we continue receiving */
 628         if (status != -ESHUTDOWN && status != -EPERM) {
 629                 usb_mark_last_busy(port->serial->dev);
 630                 err = usb_submit_urb(urb, GFP_ATOMIC);
 631                 if (err && err != -EPERM)
 632                         dev_err(&port->dev, "resubmit read urb failed."
 633                                 "(%d)\n", err);
 634         }
 635 }
 636
 637 static void sierra_instat_callback(struct urb *urb)
 638 {
 639         int err;
 640         int status = urb->status;
 641         struct usb_serial_port *port =  urb->context;
 642         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 643         struct usb_serial *serial = port->serial;
 644
 645         dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
 646                 urb, port, portdata);
 647
 648         if (status == 0) {
 649                 struct usb_ctrlrequest *req_pkt =
 650                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 651
 652                 if (!req_pkt) {
 653                         dev_dbg(&port->dev, "%s: NULL req_pkt\n",
 654                                 __func__);
 655                         return;
 656                 }
 657                 if ((req_pkt->bRequestType == 0xA1) &&
 658                                 (req_pkt->bRequest == 0x20)) {
 659                         int old_dcd_state;
 660                         unsigned char signals = *((unsigned char *)
 661                                         urb->transfer_buffer +
 662                                         sizeof(struct usb_ctrlrequest));
 663                         struct tty_struct *tty;
 664
 665                         dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
 666                                 signals);
 667
 668                         old_dcd_state = portdata->dcd_state;
 669                         portdata->cts_state = 1;
 670                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 671                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 672                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 673
 674                         tty = tty_port_tty_get(&port->port);
 675                         if (tty && !C_CLOCAL(tty) &&
 676                                         old_dcd_state && !portdata->dcd_state)
 677                                 tty_hangup(tty);
 678                         tty_kref_put(tty);
 679                 } else {
 680                         dev_dbg(&port->dev, "%s: type %x req %x\n",
 681                                 __func__, req_pkt->bRequestType,
 682                                 req_pkt->bRequest);
 683                 }
 684         } else
 685                 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
 686
 687         /* Resubmit urb so we continue receiving IRQ data */
 688         if (status != -ESHUTDOWN && status != -ENOENT) {
 689                 usb_mark_last_busy(serial->dev);
 690                 urb->dev = serial->dev;
 691                 err = usb_submit_urb(urb, GFP_ATOMIC);
 692                 if (err && err != -EPERM)
 693                         dev_err(&port->dev, "%s: resubmit intr urb "
 694                                 "failed. (%d)\n", __func__, err);
 695         }
 696 }
 697
 698 static int sierra_write_room(struct tty_struct *tty)
 699 {
 700         struct usb_serial_port *port = tty->driver_data;
 701         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 702         unsigned long flags;
 703
 704         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 705
 706         /* try to give a good number back based on if we have any free urbs at
 707          * this point in time */
 708         spin_lock_irqsave(&portdata->lock, flags);
 709         if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
 710                 spin_unlock_irqrestore(&portdata->lock, flags);
 711                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 712                 return 0;
 713         }
 714         spin_unlock_irqrestore(&portdata->lock, flags);
 715
 716         return 2048;
 717 }
 718
 719 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
 720 {
 721         int i;
 722         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 723
 724         for (i = 0; i < portdata->num_in_urbs; i++)
 725                 usb_kill_urb(portdata->in_urbs[i]);
 726
 727         usb_kill_urb(port->interrupt_in_urb);
 728 }
 729
 730 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
 731 {
 732         int ok_cnt;
 733         int err = -EINVAL;
 734         int i;
 735         struct urb *urb;
 736         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 737
 738         ok_cnt = 0;
 739         for (i = 0; i < portdata->num_in_urbs; i++) {
 740                 urb = portdata->in_urbs[i];
 741                 if (!urb)
 742                         continue;
 743                 err = usb_submit_urb(urb, mem_flags);
 744                 if (err) {
 745                         dev_err(&port->dev, "%s: submit urb failed: %d\n",
 746                                 __func__, err);
 747                 } else {
 748                         ok_cnt++;
 749                 }
 750         }
 751
 752         if (ok_cnt && port->interrupt_in_urb) {
 753                 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
 754                 if (err) {
 755                         dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
 756                                 __func__, err);
 757                 }
 758         }
 759
 760         if (ok_cnt > 0) /* at least one rx urb submitted */
 761                 return 0;
 762         else
 763                 return err;
 764 }
 765
 766 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
 767                                         int dir, void *ctx, int len,
 768                                         gfp_t mem_flags,
 769                                         usb_complete_t callback)
 770 {
 771         struct urb      *urb;
 772         u8              *buf;
 773
 774         if (endpoint == -1)
 775                 return NULL;
 776
 777         urb = usb_alloc_urb(0, mem_flags);
 778         if (urb == NULL) {
 779                 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
 780                         __func__, endpoint);
 781                 return NULL;
 782         }
 783
 784         buf = kmalloc(len, mem_flags);
 785         if (buf) {
 786                 /* Fill URB using supplied data */
 787                 usb_fill_bulk_urb(urb, serial->dev,
 788                         usb_sndbulkpipe(serial->dev, endpoint) | dir,
 789                         buf, len, callback, ctx);
 790
 791                 /* debug */
 792                 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
 793                                 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
 794         } else {
 795                 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
 796                                 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
 797
 798                 sierra_release_urb(urb);
 799                 urb = NULL;
 800         }
 801
 802         return urb;
 803 }
 804
 805 static void sierra_close(struct usb_serial_port *port)
 806 {
 807         int i;
 808         struct usb_serial *serial = port->serial;
 809         struct sierra_port_private *portdata;
 810         struct sierra_intf_private *intfdata = port->serial->private;
 811         struct urb *urb;
 812
 813
 814         dev_dbg(&port->dev, "%s\n", __func__);
 815         portdata = usb_get_serial_port_data(port);
 816
 817         portdata->rts_state = 0;
 818         portdata->dtr_state = 0;
 819
 820         if (serial->dev) {
 821                 mutex_lock(&serial->disc_mutex);
 822                 if (!serial->disconnected) {
 823                         /* odd error handling due to pm counters */
 824                         if (!usb_autopm_get_interface(serial->interface))
 825                                 sierra_send_setup(port);
 826                         else
 827                                 usb_autopm_get_interface_no_resume(serial->interface);
 828
 829                 }
 830                 mutex_unlock(&serial->disc_mutex);
 831                 spin_lock_irq(&intfdata->susp_lock);
 832                 portdata->opened = 0;
 833                 if (--intfdata->open_ports == 0)
 834                         serial->interface->needs_remote_wakeup = 0;
 835                 spin_unlock_irq(&intfdata->susp_lock);
 836
 837                 for (;;) {
 838                         urb = usb_get_from_anchor(&portdata->delayed);
 839                         if (!urb)
 840                                 break;
 841                         kfree(urb->transfer_buffer);
 842                         usb_free_urb(urb);
 843                         usb_autopm_put_interface_async(serial->interface);
 844                         spin_lock(&portdata->lock);
 845                         portdata->outstanding_urbs--;
 846                         spin_unlock(&portdata->lock);
 847                 }
 848
 849                 /* Stop reading urbs */
 850                 sierra_stop_rx_urbs(port);
 851                 /* .. and release them */
 852                 for (i = 0; i < portdata->num_in_urbs; i++) {
 853                         sierra_release_urb(portdata->in_urbs[i]);
 854                         portdata->in_urbs[i] = NULL;
 855                 }
 856         }
 857 }
 858
 859 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
 860 {
 861         struct sierra_port_private *portdata;
 862         struct usb_serial *serial = port->serial;
 863         struct sierra_intf_private *intfdata = serial->private;
 864         int i;
 865         int err;
 866         int endpoint;
 867         struct urb *urb;
 868
 869         portdata = usb_get_serial_port_data(port);
 870
 871         dev_dbg(&port->dev, "%s\n", __func__);
 872
 873         /* Set some sane defaults */
 874         portdata->rts_state = 1;
 875         portdata->dtr_state = 1;
 876
 877
 878         endpoint = port->bulk_in_endpointAddress;
 879         for (i = 0; i < portdata->num_in_urbs; i++) {
 880                 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
 881                                         IN_BUFLEN, GFP_KERNEL,
 882                                         sierra_indat_callback);
 883                 portdata->in_urbs[i] = urb;
 884         }
 885         /* clear halt condition */
 886         usb_clear_halt(serial->dev,
 887                         usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
 888
 889         err = sierra_submit_rx_urbs(port, GFP_KERNEL);
 890         if (err)
 891                 goto err_submit;
 892
 893         sierra_send_setup(port);
 894
 895         spin_lock_irq(&intfdata->susp_lock);
 896         portdata->opened = 1;
 897         if (++intfdata->open_ports == 1)
 898                 serial->interface->needs_remote_wakeup = 1;
 899         spin_unlock_irq(&intfdata->susp_lock);
 900         usb_autopm_put_interface(serial->interface);
 901
 902         return 0;
 903
 904 err_submit:
 905         sierra_stop_rx_urbs(port);
 906
 907         for (i = 0; i < portdata->num_in_urbs; i++) {
 908                 sierra_release_urb(portdata->in_urbs[i]);
 909                 portdata->in_urbs[i] = NULL;
 910         }
 911
 912         return err;
 913 }
 914
 915
 916 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
 917 {
 918         struct sierra_port_private *portdata;
 919
 920         portdata = usb_get_serial_port_data(port);
 921         portdata->rts_state = on;
 922         portdata->dtr_state = on;
 923
 924         sierra_send_setup(port);
 925 }
 926
 927 static int sierra_startup(struct usb_serial *serial)
 928 {
 929         struct usb_serial_port *port;
 930         struct sierra_intf_private *intfdata;
 931         struct sierra_port_private *portdata;
 932         struct sierra_iface_info *himemoryp = NULL;
 933         int i;
 934         u8 ifnum;
 935
 936         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 937
 938         intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL);
 939         if (!intfdata)
 940                 return -ENOMEM;
 941
 942         spin_lock_init(&intfdata->susp_lock);
 943
 944         usb_set_serial_data(serial, intfdata);
 945
 946         /* Set Device mode to D0 */
 947         sierra_set_power_state(serial->dev, 0x0000);
 948
 949         /* Check NMEA and set */
 950         if (nmea)
 951                 sierra_vsc_set_nmea(serial->dev, 1);
 952
 953         /* Now setup per port private data */
 954         for (i = 0; i < serial->num_ports; i++) {
 955                 port = serial->port[i];
 956                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 957                 if (!portdata) {
 958                         dev_dbg(&port->dev, "%s: kmalloc for "
 959                                 "sierra_port_private (%d) failed!\n",
 960                                 __func__, i);
 961                         goto err;
 962                 }
 963                 spin_lock_init(&portdata->lock);
 964                 init_usb_anchor(&portdata->active);
 965                 init_usb_anchor(&portdata->delayed);
 966                 ifnum = i;
 967                 /* Assume low memory requirements */
 968                 portdata->num_out_urbs = N_OUT_URB;
 969                 portdata->num_in_urbs  = N_IN_URB;
 970
 971                 /* Determine actual memory requirements */
 972                 if (serial->num_ports == 1) {
 973                         /* Get interface number for composite device */
 974                         ifnum = sierra_calc_interface(serial);
 975                         himemoryp =
 976                             (struct sierra_iface_info *)&typeB_interface_list;
 977                         if (is_himemory(ifnum, himemoryp)) {
 978                                 portdata->num_out_urbs = N_OUT_URB_HM;
 979                                 portdata->num_in_urbs  = N_IN_URB_HM;
 980                         }
 981                 }
 982                 else {
 983                         himemoryp =
 984                             (struct sierra_iface_info *)&typeA_interface_list;
 985                         if (is_himemory(i, himemoryp)) {
 986                                 portdata->num_out_urbs = N_OUT_URB_HM;
 987                                 portdata->num_in_urbs  = N_IN_URB_HM;
 988                         }
 989                 }
 990                 dev_dbg(&serial->dev->dev,
 991                         "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
 992                         ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
 993                 /* Set the port private data pointer */
 994                 usb_set_serial_port_data(port, portdata);
 995         }
 996
 997         return 0;
 998 err:
 999         for (--i; i >= 0; --i) {
1000                 portdata = usb_get_serial_port_data(serial->port[i]);
1001                 kfree(portdata);
1002         }
1003         kfree(intfdata);
1004
1005         return -ENOMEM;
1006 }
1007
1008 static void sierra_release(struct usb_serial *serial)
1009 {
1010         int i;
1011         struct usb_serial_port *port;
1012         struct sierra_port_private *portdata;
1013
1014         dev_dbg(&serial->dev->dev, "%s\n", __func__);
1015
1016         for (i = 0; i < serial->num_ports; ++i) {
1017                 port = serial->port[i];
1018                 if (!port)
1019                         continue;
1020                 portdata = usb_get_serial_port_data(port);
1021                 if (!portdata)
1022                         continue;
1023                 kfree(portdata);
1024         }
1025         kfree(serial->private);
1026 }
1027
1028 #ifdef CONFIG_PM
1029 static void stop_read_write_urbs(struct usb_serial *serial)
1030 {
1031         int i;
1032         struct usb_serial_port *port;
1033         struct sierra_port_private *portdata;
1034
1035         /* Stop reading/writing urbs */
1036         for (i = 0; i < serial->num_ports; ++i) {
1037                 port = serial->port[i];
1038                 portdata = usb_get_serial_port_data(port);
1039                 sierra_stop_rx_urbs(port);
1040                 usb_kill_anchored_urbs(&portdata->active);
1041         }
1042 }
1043
1044 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
1045 {
1046         struct sierra_intf_private *intfdata;
1047         int b;
1048
1049         if (PMSG_IS_AUTO(message)) {
1050                 intfdata = serial->private;
1051                 spin_lock_irq(&intfdata->susp_lock);
1052                 b = intfdata->in_flight;
1053
1054                 if (b) {
1055                         spin_unlock_irq(&intfdata->susp_lock);
1056                         return -EBUSY;
1057                 } else {
1058                         intfdata->suspended = 1;
1059                         spin_unlock_irq(&intfdata->susp_lock);
1060                 }
1061         }
1062         stop_read_write_urbs(serial);
1063
1064         return 0;
1065 }
1066
1067 static int sierra_resume(struct usb_serial *serial)
1068 {
1069         struct usb_serial_port *port;
1070         struct sierra_intf_private *intfdata = serial->private;
1071         struct sierra_port_private *portdata;
1072         struct urb *urb;
1073         int ec = 0;
1074         int i, err;
1075
1076         spin_lock_irq(&intfdata->susp_lock);
1077         for (i = 0; i < serial->num_ports; i++) {
1078                 port = serial->port[i];
1079                 portdata = usb_get_serial_port_data(port);
1080
1081                 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1082                         usb_anchor_urb(urb, &portdata->active);
1083                         intfdata->in_flight++;
1084                         err = usb_submit_urb(urb, GFP_ATOMIC);
1085                         if (err < 0) {
1086                                 intfdata->in_flight--;
1087                                 usb_unanchor_urb(urb);
1088                                 kfree(urb->transfer_buffer);
1089                                 usb_free_urb(urb);
1090                                 spin_lock(&portdata->lock);
1091                                 portdata->outstanding_urbs--;
1092                                 spin_unlock(&portdata->lock);
1093                                 continue;
1094                         }
1095                 }
1096
1097                 if (portdata->opened) {
1098                         err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1099                         if (err)
1100                                 ec++;
1101                 }
1102         }
1103         intfdata->suspended = 0;
1104         spin_unlock_irq(&intfdata->susp_lock);
1105
1106         return ec ? -EIO : 0;
1107 }
1108
1109 static int sierra_reset_resume(struct usb_interface *intf)
1110 {
1111         struct usb_serial *serial = usb_get_intfdata(intf);
1112         dev_err(&serial->dev->dev, "%s\n", __func__);
1113         return usb_serial_resume(intf);
1114 }
1115 #else
1116 #define sierra_suspend NULL
1117 #define sierra_resume NULL
1118 #define sierra_reset_resume NULL
1119 #endif
1120
1121 static struct usb_driver sierra_driver = {
1122         .name       = "sierra",
1123         .probe      = usb_serial_probe,
1124         .disconnect = usb_serial_disconnect,
1125         .suspend    = usb_serial_suspend,
1126         .resume     = usb_serial_resume,
1127         .reset_resume = sierra_reset_resume,
1128         .id_table   = id_table,
1129         .no_dynamic_id =        1,
1130         .supports_autosuspend = 1,
1131 };
1132
1133 static struct usb_serial_driver sierra_device = {
1134         .driver = {
1135                 .owner =        THIS_MODULE,
1136                 .name =         "sierra",
1137         },
1138         .description       = "Sierra USB modem",
1139         .id_table          = id_table,
1140         .usb_driver        = &sierra_driver,
1141         .calc_num_ports    = sierra_calc_num_ports,
1142         .probe             = sierra_probe,
1143         .open              = sierra_open,
1144         .close             = sierra_close,
1145         .dtr_rts           = sierra_dtr_rts,
1146         .write             = sierra_write,
1147         .write_room        = sierra_write_room,
1148         .set_termios       = sierra_set_termios,
1149         .tiocmget          = sierra_tiocmget,
1150         .tiocmset          = sierra_tiocmset,
1151         .attach            = sierra_startup,
1152         .release           = sierra_release,
1153         .suspend           = sierra_suspend,
1154         .resume            = sierra_resume,
1155         .read_int_callback = sierra_instat_callback,
1156 };
1157
1158 /* Functions used by new usb-serial code. */
1159 static int __init sierra_init(void)
1160 {
1161         int retval;
1162         retval = usb_serial_register(&sierra_device);
1163         if (retval)
1164                 goto failed_device_register;
1165
1166
1167         retval = usb_register(&sierra_driver);
1168         if (retval)
1169                 goto failed_driver_register;
1170
1171         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1172                DRIVER_DESC "\n");
1173
1174         return 0;
1175
1176 failed_driver_register:
1177         usb_serial_deregister(&sierra_device);
1178 failed_device_register:
1179         return retval;
1180 }
1181
1182 static void __exit sierra_exit(void)
1183 {
1184         usb_deregister(&sierra_driver);
1185         usb_serial_deregister(&sierra_device);
1186 }
1187
1188 module_init(sierra_init);
1189 module_exit(sierra_exit);
1190
1191 MODULE_AUTHOR(DRIVER_AUTHOR);
1192 MODULE_DESCRIPTION(DRIVER_DESC);
1193 MODULE_VERSION(DRIVER_VERSION);
1194 MODULE_LICENSE("GPL");
1195
1196 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1197 MODULE_PARM_DESC(nmea, "NMEA streaming");
1198
1199 module_param(debug, bool, S_IRUGO | S_IWUSR);
1200 MODULE_PARM_DESC(debug, "Debug messages");