git.oblomov.eu Git - linux-2.6/blob - 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   IMPORTANT DISCLAIMER: This driver is not commercially supported by
   7   Sierra Wireless. Use at your own risk.
   8
   9   This driver is free software; you can redistribute it and/or modify
  10   it under the terms of Version 2 of the GNU General Public License as
  11   published by the Free Software Foundation.
  12
  13   Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
  14   Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
  15 */
  16
  17 #define DRIVER_VERSION "v.1.2.13a"
  18 #define DRIVER_AUTHOR "Kevin Lloyd <klloyd@sierrawireless.com>"
  19 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
  20
  21 #include <linux/kernel.h>
  22 #include <linux/jiffies.h>
  23 #include <linux/errno.h>
  24 #include <linux/tty.h>
  25 #include <linux/tty_flip.h>
  26 #include <linux/module.h>
  27 #include <linux/usb.h>
  28 #include <linux/usb/serial.h>
  29 #include <linux/usb/ch9.h>
  30
  31 #define SWIMS_USB_REQUEST_SetPower      0x00
  32 #define SWIMS_USB_REQUEST_SetNmea       0x07
  33 #define SWIMS_USB_REQUEST_SetMode       0x0B
  34 #define SWIMS_USB_REQUEST_GetSwocInfo   0x0A
  35 #define SWIMS_SET_MODE_Modem            0x0001
  36
  37 /* per port private data */
  38 #define N_IN_URB        4
  39 #define N_OUT_URB       4
  40 #define IN_BUFLEN       4096
  41
  42 static int debug;
  43 static int nmea;
  44
  45 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
  46 {
  47         int result;
  48         dev_dbg(&udev->dev, "%s", __func__);
  49         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  50                         SWIMS_USB_REQUEST_SetPower,     /* __u8 request      */
  51                         USB_TYPE_VENDOR,                /* __u8 request type */
  52                         swiState,                       /* __u16 value       */
  53                         0,                              /* __u16 index       */
  54                         NULL,                           /* void *data        */
  55                         0,                              /* __u16 size        */
  56                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  57         return result;
  58 }
  59
  60 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
  61 {
  62         int result;
  63         dev_dbg(&udev->dev, "%s", __func__);
  64         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  65                         SWIMS_USB_REQUEST_SetNmea,      /* __u8 request      */
  66                         USB_TYPE_VENDOR,                /* __u8 request type */
  67                         enable,                         /* __u16 value       */
  68                         0x0000,                         /* __u16 index       */
  69                         NULL,                           /* void *data        */
  70                         0,                              /* __u16 size        */
  71                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  72         return result;
  73 }
  74
  75 static int sierra_calc_num_ports(struct usb_serial *serial)
  76 {
  77         int result;
  78         int *num_ports = usb_get_serial_data(serial);
  79         dev_dbg(&serial->dev->dev, "%s", __func__);
  80
  81         result = *num_ports;
  82
  83         if (result) {
  84                 kfree(num_ports);
  85                 usb_set_serial_data(serial, NULL);
  86         }
  87
  88         return result;
  89 }
  90
  91 static int sierra_calc_interface(struct usb_serial *serial)
  92 {
  93         int interface;
  94         struct usb_interface *p_interface;
  95         struct usb_host_interface *p_host_interface;
  96         dev_dbg(&serial->dev->dev, "%s", __func__);
  97
  98         /* Get the interface structure pointer from the serial struct */
  99         p_interface = serial->interface;
 100
 101         /* Get a pointer to the host interface structure */
 102         p_host_interface = p_interface->cur_altsetting;
 103
 104         /* read the interface descriptor for this active altsetting
 105          * to find out the interface number we are on
 106         */
 107         interface = p_host_interface->desc.bInterfaceNumber;
 108
 109         return interface;
 110 }
 111
 112 static int sierra_probe(struct usb_serial *serial,
 113                         const struct usb_device_id *id)
 114 {
 115         int result = 0;
 116         struct usb_device *udev;
 117         int *num_ports;
 118         u8 ifnum;
 119         u8 numendpoints;
 120
 121         dev_dbg(&serial->dev->dev, "%s", __func__);
 122
 123         num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
 124         if (!num_ports)
 125                 return -ENOMEM;
 126
 127         ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
 128         numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
 129         udev = serial->dev;
 130
 131         /* Figure out the interface number from the serial structure */
 132         ifnum = sierra_calc_interface(serial);
 133
 134         /*
 135          * If this interface supports more than 1 alternate
 136          * select the 2nd one
 137          */
 138         if (serial->interface->num_altsetting == 2) {
 139                 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
 140                         ifnum);
 141                 /* We know the alternate setting is 1 for the MC8785 */
 142                 usb_set_interface(udev, ifnum, 1);
 143         }
 144
 145         /* Dummy interface present on some SKUs should be ignored */
 146         if (ifnum == 0x99)
 147                 *num_ports = 0;
 148         else if (numendpoints <= 3)
 149                 *num_ports = 1;
 150         else
 151                 *num_ports = (numendpoints-1)/2;
 152
 153         /*
 154          * save off our num_ports info so that we can use it in the
 155          * calc_num_ports callback
 156          */
 157         usb_set_serial_data(serial, (void *)num_ports);
 158
 159         return result;
 160 }
 161
 162 static struct usb_device_id id_table [] = {
 163         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
 164         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 165         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 166         { USB_DEVICE(0x0f30, 0x1b1d) }, /* Sierra Wireless MC5720 */
 167         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 168         { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
 169         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 170         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 171         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 172         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
 173          /* Sierra Wireless C597 */
 174         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
 175          /* Sierra Wireless Device */
 176         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
 177         { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless Device */
 178
 179         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 180         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 181         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 182         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 183         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Lenovo) */
 184         { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
 185         { USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
 186         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 187         { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
 188         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
 189         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
 190         { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
 191         { USB_DEVICE(0x1199, 0x683C) }, /* Sierra Wireless MC8790 */
 192         { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8790 */
 193         { USB_DEVICE(0x1199, 0x683E) }, /* Sierra Wireless MC8790 */
 194         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 195         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 196         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
 197         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
 198         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 199         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
 200         { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
 201         { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
 202         /* Sierra Wireless C885 */
 203         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
 204         /* Sierra Wireless Device */
 205         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
 206         /* Sierra Wireless Device */
 207         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
 208
 209         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
 210         { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
 211
 212         { }
 213 };
 214 MODULE_DEVICE_TABLE(usb, id_table);
 215
 216 static struct usb_driver sierra_driver = {
 217         .name       = "sierra",
 218         .probe      = usb_serial_probe,
 219         .disconnect = usb_serial_disconnect,
 220         .id_table   = id_table,
 221         .no_dynamic_id =        1,
 222 };
 223
 224 struct sierra_port_private {
 225         spinlock_t lock;        /* lock the structure */
 226         int outstanding_urbs;   /* number of out urbs in flight */
 227
 228         /* Input endpoints and buffers for this port */
 229         struct urb *in_urbs[N_IN_URB];
 230         char *in_buffer[N_IN_URB];
 231
 232         /* Settings for the port */
 233         int rts_state;  /* Handshaking pins (outputs) */
 234         int dtr_state;
 235         int cts_state;  /* Handshaking pins (inputs) */
 236         int dsr_state;
 237         int dcd_state;
 238         int ri_state;
 239 };
 240
 241 static int sierra_send_setup(struct tty_struct *tty,
 242                                                 struct usb_serial_port *port)
 243 {
 244         struct usb_serial *serial = port->serial;
 245         struct sierra_port_private *portdata;
 246         __u16 interface = 0;
 247
 248         dbg("%s", __func__);
 249
 250         portdata = usb_get_serial_port_data(port);
 251
 252         if (tty) {
 253                 int val = 0;
 254                 if (portdata->dtr_state)
 255                         val |= 0x01;
 256                 if (portdata->rts_state)
 257                         val |= 0x02;
 258
 259                 /* If composite device then properly report interface */
 260                 if (serial->num_ports == 1)
 261                         interface = sierra_calc_interface(serial);
 262
 263                 /* Otherwise the need to do non-composite mapping */
 264                 else {
 265                         if (port->bulk_out_endpointAddress == 2)
 266                                 interface = 0;
 267                         else if (port->bulk_out_endpointAddress == 4)
 268                                 interface = 1;
 269                         else if (port->bulk_out_endpointAddress == 5)
 270                                 interface = 2;
 271                 }
 272
 273                 return usb_control_msg(serial->dev,
 274                                 usb_rcvctrlpipe(serial->dev, 0),
 275                                 0x22, 0x21, val, interface,
 276                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
 277         }
 278
 279         return 0;
 280 }
 281
 282 static void sierra_set_termios(struct tty_struct *tty,
 283                 struct usb_serial_port *port, struct ktermios *old_termios)
 284 {
 285         dbg("%s", __func__);
 286         tty_termios_copy_hw(tty->termios, old_termios);
 287         sierra_send_setup(tty, port);
 288 }
 289
 290 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 291 {
 292         struct usb_serial_port *port = tty->driver_data;
 293         unsigned int value;
 294         struct sierra_port_private *portdata;
 295
 296         portdata = usb_get_serial_port_data(port);
 297
 298         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 299                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 300                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 301                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 302                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 303                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 304
 305         return value;
 306 }
 307
 308 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
 309                         unsigned int set, unsigned int clear)
 310 {
 311         struct usb_serial_port *port = tty->driver_data;
 312         struct sierra_port_private *portdata;
 313
 314         portdata = usb_get_serial_port_data(port);
 315
 316         if (set & TIOCM_RTS)
 317                 portdata->rts_state = 1;
 318         if (set & TIOCM_DTR)
 319                 portdata->dtr_state = 1;
 320
 321         if (clear & TIOCM_RTS)
 322                 portdata->rts_state = 0;
 323         if (clear & TIOCM_DTR)
 324                 portdata->dtr_state = 0;
 325         return sierra_send_setup(tty, port);
 326 }
 327
 328 static void sierra_outdat_callback(struct urb *urb)
 329 {
 330         struct usb_serial_port *port = urb->context;
 331         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 332         int status = urb->status;
 333         unsigned long flags;
 334
 335         dbg("%s - port %d", __func__, port->number);
 336
 337         /* free up the transfer buffer, as usb_free_urb() does not do this */
 338         kfree(urb->transfer_buffer);
 339
 340         if (status)
 341                 dbg("%s - nonzero write bulk status received: %d",
 342                     __func__, status);
 343
 344         spin_lock_irqsave(&portdata->lock, flags);
 345         --portdata->outstanding_urbs;
 346         spin_unlock_irqrestore(&portdata->lock, flags);
 347
 348         usb_serial_port_softint(port);
 349 }
 350
 351 /* Write */
 352 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 353                                         const unsigned char *buf, int count)
 354 {
 355         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 356         struct usb_serial *serial = port->serial;
 357         unsigned long flags;
 358         unsigned char *buffer;
 359         struct urb *urb;
 360         int status;
 361
 362         portdata = usb_get_serial_port_data(port);
 363
 364         dbg("%s: write (%d chars)", __func__, count);
 365
 366         spin_lock_irqsave(&portdata->lock, flags);
 367         if (portdata->outstanding_urbs > N_OUT_URB) {
 368                 spin_unlock_irqrestore(&portdata->lock, flags);
 369                 dbg("%s - write limit hit\n", __func__);
 370                 return 0;
 371         }
 372         portdata->outstanding_urbs++;
 373         spin_unlock_irqrestore(&portdata->lock, flags);
 374
 375         buffer = kmalloc(count, GFP_ATOMIC);
 376         if (!buffer) {
 377                 dev_err(&port->dev, "out of memory\n");
 378                 count = -ENOMEM;
 379                 goto error_no_buffer;
 380         }
 381
 382         urb = usb_alloc_urb(0, GFP_ATOMIC);
 383         if (!urb) {
 384                 dev_err(&port->dev, "no more free urbs\n");
 385                 count = -ENOMEM;
 386                 goto error_no_urb;
 387         }
 388
 389         memcpy(buffer, buf, count);
 390
 391         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 392
 393         usb_fill_bulk_urb(urb, serial->dev,
 394                           usb_sndbulkpipe(serial->dev,
 395                                           port->bulk_out_endpointAddress),
 396                           buffer, count, sierra_outdat_callback, port);
 397
 398         /* send it down the pipe */
 399         status = usb_submit_urb(urb, GFP_ATOMIC);
 400         if (status) {
 401                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 402                         "with status = %d\n", __func__, status);
 403                 count = status;
 404                 goto error;
 405         }
 406
 407         /* we are done with this urb, so let the host driver
 408          * really free it when it is finished with it */
 409         usb_free_urb(urb);
 410
 411         return count;
 412 error:
 413         usb_free_urb(urb);
 414 error_no_urb:
 415         kfree(buffer);
 416 error_no_buffer:
 417         spin_lock_irqsave(&portdata->lock, flags);
 418         --portdata->outstanding_urbs;
 419         spin_unlock_irqrestore(&portdata->lock, flags);
 420         return count;
 421 }
 422
 423 static void sierra_indat_callback(struct urb *urb)
 424 {
 425         int err;
 426         int endpoint;
 427         struct usb_serial_port *port;
 428         struct tty_struct *tty;
 429         unsigned char *data = urb->transfer_buffer;
 430         int status = urb->status;
 431
 432         dbg("%s: %p", __func__, urb);
 433
 434         endpoint = usb_pipeendpoint(urb->pipe);
 435         port =  urb->context;
 436
 437         if (status) {
 438                 dbg("%s: nonzero status: %d on endpoint %02x.",
 439                     __func__, status, endpoint);
 440         } else {
 441                 tty = port->port.tty;
 442                 if (urb->actual_length) {
 443                         tty_buffer_request_room(tty, urb->actual_length);
 444                         tty_insert_flip_string(tty, data, urb->actual_length);
 445                         tty_flip_buffer_push(tty);
 446                 } else {
 447                         dbg("%s: empty read urb received", __func__);
 448                 }
 449
 450                 /* Resubmit urb so we continue receiving */
 451                 if (port->port.count && status != -ESHUTDOWN) {
 452                         err = usb_submit_urb(urb, GFP_ATOMIC);
 453                         if (err)
 454                                 dev_err(&port->dev, "resubmit read urb failed."
 455                                         "(%d)\n", err);
 456                 }
 457         }
 458         return;
 459 }
 460
 461 static void sierra_instat_callback(struct urb *urb)
 462 {
 463         int err;
 464         int status = urb->status;
 465         struct usb_serial_port *port =  urb->context;
 466         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 467         struct usb_serial *serial = port->serial;
 468
 469         dbg("%s", __func__);
 470         dbg("%s: urb %p port %p has data %p", __func__, urb, port, portdata);
 471
 472         if (status == 0) {
 473                 struct usb_ctrlrequest *req_pkt =
 474                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 475
 476                 if (!req_pkt) {
 477                         dbg("%s: NULL req_pkt\n", __func__);
 478                         return;
 479                 }
 480                 if ((req_pkt->bRequestType == 0xA1) &&
 481                                 (req_pkt->bRequest == 0x20)) {
 482                         int old_dcd_state;
 483                         unsigned char signals = *((unsigned char *)
 484                                         urb->transfer_buffer +
 485                                         sizeof(struct usb_ctrlrequest));
 486
 487                         dbg("%s: signal x%x", __func__, signals);
 488
 489                         old_dcd_state = portdata->dcd_state;
 490                         portdata->cts_state = 1;
 491                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 492                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 493                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 494
 495                         if (port->port.tty && !C_CLOCAL(port->port.tty) &&
 496                                         old_dcd_state && !portdata->dcd_state)
 497                                 tty_hangup(port->port.tty);
 498                 } else {
 499                         dbg("%s: type %x req %x", __func__,
 500                                 req_pkt->bRequestType, req_pkt->bRequest);
 501                 }
 502         } else
 503                 dbg("%s: error %d", __func__, status);
 504
 505         /* Resubmit urb so we continue receiving IRQ data */
 506         if (status != -ESHUTDOWN) {
 507                 urb->dev = serial->dev;
 508                 err = usb_submit_urb(urb, GFP_ATOMIC);
 509                 if (err)
 510                         dbg("%s: resubmit intr urb failed. (%d)",
 511                                 __func__, err);
 512         }
 513 }
 514
 515 static int sierra_write_room(struct tty_struct *tty)
 516 {
 517         struct usb_serial_port *port = tty->driver_data;
 518         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 519         unsigned long flags;
 520
 521         dbg("%s - port %d", __func__, port->number);
 522
 523         /* try to give a good number back based on if we have any free urbs at
 524          * this point in time */
 525         spin_lock_irqsave(&portdata->lock, flags);
 526         if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
 527                 spin_unlock_irqrestore(&portdata->lock, flags);
 528                 dbg("%s - write limit hit\n", __func__);
 529                 return 0;
 530         }
 531         spin_unlock_irqrestore(&portdata->lock, flags);
 532
 533         return 2048;
 534 }
 535
 536 static int sierra_open(struct tty_struct *tty,
 537                         struct usb_serial_port *port, struct file *filp)
 538 {
 539         struct sierra_port_private *portdata;
 540         struct usb_serial *serial = port->serial;
 541         int i;
 542         struct urb *urb;
 543         int result;
 544
 545         portdata = usb_get_serial_port_data(port);
 546
 547         dbg("%s", __func__);
 548
 549         /* Set some sane defaults */
 550         portdata->rts_state = 1;
 551         portdata->dtr_state = 1;
 552
 553         /* Reset low level data toggle and start reading from endpoints */
 554         for (i = 0; i < N_IN_URB; i++) {
 555                 urb = portdata->in_urbs[i];
 556                 if (!urb)
 557                         continue;
 558                 if (urb->dev != serial->dev) {
 559                         dbg("%s: dev %p != %p", __func__,
 560                                 urb->dev, serial->dev);
 561                         continue;
 562                 }
 563
 564                 /*
 565                  * make sure endpoint data toggle is synchronized with the
 566                  * device
 567                  */
 568                 usb_clear_halt(urb->dev, urb->pipe);
 569
 570                 result = usb_submit_urb(urb, GFP_KERNEL);
 571                 if (result) {
 572                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
 573                                 i, result, urb->transfer_buffer_length);
 574                 }
 575         }
 576
 577         if (tty)
 578                 tty->low_latency = 1;
 579
 580         sierra_send_setup(tty, port);
 581
 582         /* start up the interrupt endpoint if we have one */
 583         if (port->interrupt_in_urb) {
 584                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 585                 if (result)
 586                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
 587                                 result);
 588         }
 589         return 0;
 590 }
 591
 592 static void sierra_close(struct tty_struct *tty,
 593                         struct usb_serial_port *port, struct file *filp)
 594 {
 595         int i;
 596         struct usb_serial *serial = port->serial;
 597         struct sierra_port_private *portdata;
 598
 599         dbg("%s", __func__);
 600         portdata = usb_get_serial_port_data(port);
 601
 602         portdata->rts_state = 0;
 603         portdata->dtr_state = 0;
 604
 605         if (serial->dev) {
 606                 mutex_lock(&serial->disc_mutex);
 607                 if (!serial->disconnected)
 608                         sierra_send_setup(tty, port);
 609                 mutex_unlock(&serial->disc_mutex);
 610
 611                 /* Stop reading/writing urbs */
 612                 for (i = 0; i < N_IN_URB; i++)
 613                         usb_kill_urb(portdata->in_urbs[i]);
 614         }
 615
 616         usb_kill_urb(port->interrupt_in_urb);
 617
 618         port->port.tty = NULL;  /* FIXME */
 619 }
 620
 621 static int sierra_startup(struct usb_serial *serial)
 622 {
 623         struct usb_serial_port *port;
 624         struct sierra_port_private *portdata;
 625         struct urb *urb;
 626         int i;
 627         int j;
 628
 629         dbg("%s", __func__);
 630
 631         /* Set Device mode to D0 */
 632         sierra_set_power_state(serial->dev, 0x0000);
 633
 634         /* Check NMEA and set */
 635         if (nmea)
 636                 sierra_vsc_set_nmea(serial->dev, 1);
 637
 638         /* Now setup per port private data */
 639         for (i = 0; i < serial->num_ports; i++) {
 640                 port = serial->port[i];
 641                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 642                 if (!portdata) {
 643                         dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
 644                                         __func__, i);
 645                         return -ENOMEM;
 646                 }
 647                 spin_lock_init(&portdata->lock);
 648                 for (j = 0; j < N_IN_URB; j++) {
 649                         portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
 650                         if (!portdata->in_buffer[j]) {
 651                                 for (--j; j >= 0; j--)
 652                                         kfree(portdata->in_buffer[j]);
 653                                 kfree(portdata);
 654                                 return -ENOMEM;
 655                         }
 656                 }
 657
 658                 usb_set_serial_port_data(port, portdata);
 659
 660                 /* initialize the in urbs */
 661                 for (j = 0; j < N_IN_URB; ++j) {
 662                         urb = usb_alloc_urb(0, GFP_KERNEL);
 663                         if (urb == NULL) {
 664                                 dbg("%s: alloc for in port failed.",
 665                                     __func__);
 666                                 continue;
 667                         }
 668                         /* Fill URB using supplied data. */
 669                         usb_fill_bulk_urb(urb, serial->dev,
 670                                           usb_rcvbulkpipe(serial->dev,
 671                                                 port->bulk_in_endpointAddress),
 672                                           portdata->in_buffer[j], IN_BUFLEN,
 673                                           sierra_indat_callback, port);
 674                         portdata->in_urbs[j] = urb;
 675                 }
 676         }
 677
 678         return 0;
 679 }
 680
 681 static void sierra_shutdown(struct usb_serial *serial)
 682 {
 683         int i, j;
 684         struct usb_serial_port *port;
 685         struct sierra_port_private *portdata;
 686
 687         dbg("%s", __func__);
 688
 689         for (i = 0; i < serial->num_ports; ++i) {
 690                 port = serial->port[i];
 691                 if (!port)
 692                         continue;
 693                 portdata = usb_get_serial_port_data(port);
 694                 if (!portdata)
 695                         continue;
 696
 697                 for (j = 0; j < N_IN_URB; j++) {
 698                         usb_kill_urb(portdata->in_urbs[j]);
 699                         usb_free_urb(portdata->in_urbs[j]);
 700                         kfree(portdata->in_buffer[j]);
 701                 }
 702                 kfree(portdata);
 703                 usb_set_serial_port_data(port, NULL);
 704         }
 705 }
 706
 707 static struct usb_serial_driver sierra_device = {
 708         .driver = {
 709                 .owner =        THIS_MODULE,
 710                 .name =         "sierra",
 711         },
 712         .description       = "Sierra USB modem",
 713         .id_table          = id_table,
 714         .usb_driver        = &sierra_driver,
 715         .calc_num_ports    = sierra_calc_num_ports,
 716         .probe             = sierra_probe,
 717         .open              = sierra_open,
 718         .close             = sierra_close,
 719         .write             = sierra_write,
 720         .write_room        = sierra_write_room,
 721         .set_termios       = sierra_set_termios,
 722         .tiocmget          = sierra_tiocmget,
 723         .tiocmset          = sierra_tiocmset,
 724         .attach            = sierra_startup,
 725         .shutdown          = sierra_shutdown,
 726         .read_int_callback = sierra_instat_callback,
 727 };
 728
 729 /* Functions used by new usb-serial code. */
 730 static int __init sierra_init(void)
 731 {
 732         int retval;
 733         retval = usb_serial_register(&sierra_device);
 734         if (retval)
 735                 goto failed_device_register;
 736
 737
 738         retval = usb_register(&sierra_driver);
 739         if (retval)
 740                 goto failed_driver_register;
 741
 742         info(DRIVER_DESC ": " DRIVER_VERSION);
 743
 744         return 0;
 745
 746 failed_driver_register:
 747         usb_serial_deregister(&sierra_device);
 748 failed_device_register:
 749         return retval;
 750 }
 751
 752 static void __exit sierra_exit(void)
 753 {
 754         usb_deregister(&sierra_driver);
 755         usb_serial_deregister(&sierra_device);
 756 }
 757
 758 module_init(sierra_init);
 759 module_exit(sierra_exit);
 760
 761 MODULE_AUTHOR(DRIVER_AUTHOR);
 762 MODULE_DESCRIPTION(DRIVER_DESC);
 763 MODULE_VERSION(DRIVER_VERSION);
 764 MODULE_LICENSE("GPL");
 765
 766 module_param(nmea, bool, S_IRUGO | S_IWUSR);
 767 MODULE_PARM_DESC(nmea, "NMEA streaming");
 768
 769 module_param(debug, bool, S_IRUGO | S_IWUSR);
 770 MODULE_PARM_DESC(debug, "Debug messages");