err.no Git - linux-2.6/blob - drivers/usb/serial/sierra.c

   1 /*
   2   USB Driver for Sierra Wireless
   3
   4   Copyright (C) 2006, 2007  Kevin Lloyd <linux@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.1.2.5b"
  18 #define DRIVER_AUTHOR "Kevin Lloyd <linux@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
  30 #define SWIMS_USB_REQUEST_SetMode       0x0B
  31 #define SWIMS_USB_REQUEST_TYPE_SetMode  0x40
  32 #define SWIMS_USB_INDEX_SetMode         0x0000
  33 #define SWIMS_SET_MODE_Modem            0x0001
  34
  35 /* per port private data */
  36 #define N_IN_URB        4
  37 #define N_OUT_URB       4
  38 #define IN_BUFLEN       4096
  39
  40 static int debug;
  41
  42 enum devicetype {
  43         DEVICE_3_PORT =         0,
  44         DEVICE_1_PORT =         1,
  45         DEVICE_INSTALLER =      2,
  46 };
  47
  48 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
  49 {
  50         int result;
  51         dev_dbg(&udev->dev, "%s", "SET POWER STATE\n");
  52         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  53                         0x00,                   /* __u8 request      */
  54                         0x40,                   /* __u8 request type */
  55                         swiState,               /* __u16 value       */
  56                         0,                      /* __u16 index       */
  57                         NULL,                   /* void *data        */
  58                         0,                      /* __u16 size        */
  59                         USB_CTRL_SET_TIMEOUT);  /* int timeout       */
  60         return result;
  61 }
  62
  63 static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSocMode)
  64 {
  65         int result;
  66         dev_dbg(&udev->dev, "%s", "DEVICE MODE SWITCH\n");
  67         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  68                         SWIMS_USB_REQUEST_SetMode,      /* __u8 request      */
  69                         SWIMS_USB_REQUEST_TYPE_SetMode, /* __u8 request type */
  70                         eSocMode,                       /* __u16 value       */
  71                         SWIMS_USB_INDEX_SetMode,        /* __u16 index       */
  72                         NULL,                           /* void *data        */
  73                         0,                              /* __u16 size        */
  74                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  75         return result;
  76 }
  77
  78 static int sierra_probe(struct usb_interface *iface,
  79                         const struct usb_device_id *id)
  80 {
  81         int result;
  82         struct usb_device *udev;
  83
  84         udev = usb_get_dev(interface_to_usbdev(iface));
  85
  86         /* Check if in installer mode */
  87         if (id->driver_info == DEVICE_INSTALLER) {
  88                 dev_dbg(&udev->dev, "%s", "FOUND DEVICE(SW)\n");
  89                 result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
  90                 /*We do not want to bind to the device when in installer mode*/
  91                 return -EIO;
  92         }
  93
  94         return usb_serial_probe(iface, id);
  95 }
  96
  97 static struct usb_device_id id_table [] = {
  98         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
  99         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 100         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 101         { USB_DEVICE(0x0f30, 0x1b1d) }, /* Sierra Wireless MC5720 */
 102         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 103         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 104         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 105         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 106         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
 107         { USB_DEVICE(0x1199, 0x0023) }, /* Sierra Wireless AirCard */
 108
 109         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 110         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 111         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 112         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 113         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Thinkpad internal) */
 114         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 115         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780*/
 116         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781*/
 117         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 118         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 119         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
 120         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
 121         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 122         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
 123
 124         { USB_DEVICE(0x1199, 0x6468) }, /* Sierra Wireless MP3G - EVDO */
 125         { USB_DEVICE(0x1199, 0x6469) }, /* Sierra Wireless MP3G - UMTS/HSPA */
 126
 127         { USB_DEVICE(0x1199, 0x0112), .driver_info = DEVICE_1_PORT }, /* Sierra Wireless AirCard 580 */
 128         { USB_DEVICE(0x0F3D, 0x0112), .driver_info = DEVICE_1_PORT }, /* Airprime/Sierra PC 5220 */
 129
 130         { USB_DEVICE(0x1199, 0x0FFF), .driver_info = DEVICE_INSTALLER},
 131         { }
 132 };
 133 MODULE_DEVICE_TABLE(usb, id_table);
 134
 135 static struct usb_device_id id_table_1port [] = {
 136         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
 137         { USB_DEVICE(0x0F3D, 0x0112) }, /* AirPrime/Sierra PC 5220 */
 138         { }
 139 };
 140
 141 static struct usb_device_id id_table_3port [] = {
 142         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
 143         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 144         { USB_DEVICE(0x0f30, 0x1b1d) }, /* Sierra Wireless MC5720 */
 145         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 146         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 147         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 148         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 149         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 150         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U*/
 151         { USB_DEVICE(0x1199, 0x0023) }, /* Sierra Wireless AirCard */
 152
 153         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 154         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 155         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 156         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 157         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Thinkpad internal) */
 158         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 159         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780*/
 160         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781*/
 161         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 162         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 163         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880E */
 164         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881E */
 165         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 166         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881U */
 167         { USB_DEVICE(0x1199, 0x6468) }, /* Sierra Wireless MP3G - EVDO */
 168         { USB_DEVICE(0x1199, 0x6469) }, /* Sierra Wireless MP3G - UMTS/HSPA */
 169         { }
 170 };
 171
 172 static struct usb_driver sierra_driver = {
 173         .name       = "sierra",
 174         .probe      = sierra_probe,
 175         .disconnect = usb_serial_disconnect,
 176         .id_table   = id_table,
 177         .no_dynamic_id =        1,
 178 };
 179
 180
 181 struct sierra_port_private {
 182         spinlock_t lock;        /* lock the structure */
 183         int outstanding_urbs;   /* number of out urbs in flight */
 184
 185         /* Input endpoints and buffer for this port */
 186         struct urb *in_urbs[N_IN_URB];
 187         char in_buffer[N_IN_URB][IN_BUFLEN];
 188
 189         /* Settings for the port */
 190         int rts_state;  /* Handshaking pins (outputs) */
 191         int dtr_state;
 192         int cts_state;  /* Handshaking pins (inputs) */
 193         int dsr_state;
 194         int dcd_state;
 195         int ri_state;
 196 };
 197
 198 static int sierra_send_setup(struct usb_serial_port *port)
 199 {
 200         struct usb_serial *serial = port->serial;
 201         struct sierra_port_private *portdata;
 202
 203         dbg("%s", __FUNCTION__);
 204
 205         portdata = usb_get_serial_port_data(port);
 206
 207         if (port->tty) {
 208                 int val = 0;
 209                 if (portdata->dtr_state)
 210                         val |= 0x01;
 211                 if (portdata->rts_state)
 212                         val |= 0x02;
 213
 214                 return usb_control_msg(serial->dev,
 215                                 usb_rcvctrlpipe(serial->dev, 0),
 216                                 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
 217         }
 218
 219         return 0;
 220 }
 221
 222 static void sierra_rx_throttle(struct usb_serial_port *port)
 223 {
 224         dbg("%s", __FUNCTION__);
 225 }
 226
 227 static void sierra_rx_unthrottle(struct usb_serial_port *port)
 228 {
 229         dbg("%s", __FUNCTION__);
 230 }
 231
 232 static void sierra_break_ctl(struct usb_serial_port *port, int break_state)
 233 {
 234         /* Unfortunately, I don't know how to send a break */
 235         dbg("%s", __FUNCTION__);
 236 }
 237
 238 static void sierra_set_termios(struct usb_serial_port *port,
 239                         struct ktermios *old_termios)
 240 {
 241         dbg("%s", __FUNCTION__);
 242         tty_termios_copy_hw(port->tty->termios, old_termios);
 243         sierra_send_setup(port);
 244 }
 245
 246 static int sierra_tiocmget(struct usb_serial_port *port, struct file *file)
 247 {
 248         unsigned int value;
 249         struct sierra_port_private *portdata;
 250
 251         portdata = usb_get_serial_port_data(port);
 252
 253         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 254                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 255                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 256                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 257                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 258                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 259
 260         return value;
 261 }
 262
 263 static int sierra_tiocmset(struct usb_serial_port *port, struct file *file,
 264                         unsigned int set, unsigned int clear)
 265 {
 266         struct sierra_port_private *portdata;
 267
 268         portdata = usb_get_serial_port_data(port);
 269
 270         if (set & TIOCM_RTS)
 271                 portdata->rts_state = 1;
 272         if (set & TIOCM_DTR)
 273                 portdata->dtr_state = 1;
 274
 275         if (clear & TIOCM_RTS)
 276                 portdata->rts_state = 0;
 277         if (clear & TIOCM_DTR)
 278                 portdata->dtr_state = 0;
 279         return sierra_send_setup(port);
 280 }
 281
 282 static int sierra_ioctl(struct usb_serial_port *port, struct file *file,
 283                         unsigned int cmd, unsigned long arg)
 284 {
 285         return -ENOIOCTLCMD;
 286 }
 287
 288 static void sierra_outdat_callback(struct urb *urb)
 289 {
 290         struct usb_serial_port *port = urb->context;
 291         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 292         int status = urb->status;
 293         unsigned long flags;
 294
 295         dbg("%s - port %d", __FUNCTION__, port->number);
 296
 297         /* free up the transfer buffer, as usb_free_urb() does not do this */
 298         kfree(urb->transfer_buffer);
 299
 300         if (status)
 301                 dbg("%s - nonzero write bulk status received: %d",
 302                     __FUNCTION__, status);
 303
 304         spin_lock_irqsave(&portdata->lock, flags);
 305         --portdata->outstanding_urbs;
 306         spin_unlock_irqrestore(&portdata->lock, flags);
 307
 308         usb_serial_port_softint(port);
 309 }
 310
 311 /* Write */
 312 static int sierra_write(struct usb_serial_port *port,
 313                         const unsigned char *buf, int count)
 314 {
 315         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 316         struct usb_serial *serial = port->serial;
 317         unsigned long flags;
 318         unsigned char *buffer;
 319         struct urb *urb;
 320         int status;
 321
 322         portdata = usb_get_serial_port_data(port);
 323
 324         dbg("%s: write (%d chars)", __FUNCTION__, count);
 325
 326         spin_lock_irqsave(&portdata->lock, flags);
 327         if (portdata->outstanding_urbs > N_OUT_URB) {
 328                 spin_unlock_irqrestore(&portdata->lock, flags);
 329                 dbg("%s - write limit hit\n", __FUNCTION__);
 330                 return 0;
 331         }
 332         portdata->outstanding_urbs++;
 333         spin_unlock_irqrestore(&portdata->lock, flags);
 334
 335         buffer = kmalloc(count, GFP_ATOMIC);
 336         if (!buffer) {
 337                 dev_err(&port->dev, "out of memory\n");
 338                 count = -ENOMEM;
 339                 goto error_no_buffer;
 340         }
 341
 342         urb = usb_alloc_urb(0, GFP_ATOMIC);
 343         if (!urb) {
 344                 dev_err(&port->dev, "no more free urbs\n");
 345                 count = -ENOMEM;
 346                 goto error_no_urb;
 347         }
 348
 349         memcpy(buffer, buf, count);
 350
 351         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, buffer);
 352
 353         usb_fill_bulk_urb(urb, serial->dev,
 354                           usb_sndbulkpipe(serial->dev,
 355                                           port->bulk_out_endpointAddress),
 356                           buffer, count, sierra_outdat_callback, port);
 357
 358         /* send it down the pipe */
 359         status = usb_submit_urb(urb, GFP_ATOMIC);
 360         if (status) {
 361                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 362                         "with status = %d\n", __FUNCTION__, status);
 363                 count = status;
 364                 goto error;
 365         }
 366
 367         /* we are done with this urb, so let the host driver
 368          * really free it when it is finished with it */
 369         usb_free_urb(urb);
 370
 371         return count;
 372 error:
 373         usb_free_urb(urb);
 374 error_no_urb:
 375         kfree(buffer);
 376 error_no_buffer:
 377         spin_lock_irqsave(&portdata->lock, flags);
 378         --portdata->outstanding_urbs;
 379         spin_unlock_irqrestore(&portdata->lock, flags);
 380         return count;
 381 }
 382
 383 static void sierra_indat_callback(struct urb *urb)
 384 {
 385         int err;
 386         int endpoint;
 387         struct usb_serial_port *port;
 388         struct tty_struct *tty;
 389         unsigned char *data = urb->transfer_buffer;
 390         int status = urb->status;
 391
 392         dbg("%s: %p", __FUNCTION__, urb);
 393
 394         endpoint = usb_pipeendpoint(urb->pipe);
 395         port = (struct usb_serial_port *) urb->context;
 396
 397         if (status) {
 398                 dbg("%s: nonzero status: %d on endpoint %02x.",
 399                     __FUNCTION__, status, endpoint);
 400         } else {
 401                 tty = port->tty;
 402                 if (urb->actual_length) {
 403                         tty_buffer_request_room(tty, urb->actual_length);
 404                         tty_insert_flip_string(tty, data, urb->actual_length);
 405                         tty_flip_buffer_push(tty);
 406                 } else {
 407                         dbg("%s: empty read urb received", __FUNCTION__);
 408                 }
 409
 410                 /* Resubmit urb so we continue receiving */
 411                 if (port->open_count && status != -ESHUTDOWN) {
 412                         err = usb_submit_urb(urb, GFP_ATOMIC);
 413                         if (err)
 414                                 dev_err(&port->dev, "resubmit read urb failed."
 415                                         "(%d)\n", err);
 416                 }
 417         }
 418         return;
 419 }
 420
 421 static void sierra_instat_callback(struct urb *urb)
 422 {
 423         int err;
 424         int status = urb->status;
 425         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
 426         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 427         struct usb_serial *serial = port->serial;
 428
 429         dbg("%s", __FUNCTION__);
 430         dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
 431
 432         if (status == 0) {
 433                 struct usb_ctrlrequest *req_pkt =
 434                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 435
 436                 if (!req_pkt) {
 437                         dbg("%s: NULL req_pkt\n", __FUNCTION__);
 438                         return;
 439                 }
 440                 if ((req_pkt->bRequestType == 0xA1) &&
 441                                 (req_pkt->bRequest == 0x20)) {
 442                         int old_dcd_state;
 443                         unsigned char signals = *((unsigned char *)
 444                                         urb->transfer_buffer +
 445                                         sizeof(struct usb_ctrlrequest));
 446
 447                         dbg("%s: signal x%x", __FUNCTION__, signals);
 448
 449                         old_dcd_state = portdata->dcd_state;
 450                         portdata->cts_state = 1;
 451                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 452                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 453                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 454
 455                         if (port->tty && !C_CLOCAL(port->tty) &&
 456                                         old_dcd_state && !portdata->dcd_state)
 457                                 tty_hangup(port->tty);
 458                 } else {
 459                         dbg("%s: type %x req %x", __FUNCTION__,
 460                                 req_pkt->bRequestType,req_pkt->bRequest);
 461                 }
 462         } else
 463                 dbg("%s: error %d", __FUNCTION__, status);
 464
 465         /* Resubmit urb so we continue receiving IRQ data */
 466         if (status != -ESHUTDOWN) {
 467                 urb->dev = serial->dev;
 468                 err = usb_submit_urb(urb, GFP_ATOMIC);
 469                 if (err)
 470                         dbg("%s: resubmit intr urb failed. (%d)",
 471                                 __FUNCTION__, err);
 472         }
 473 }
 474
 475 static int sierra_write_room(struct usb_serial_port *port)
 476 {
 477         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 478         unsigned long flags;
 479
 480         dbg("%s - port %d", __FUNCTION__, port->number);
 481
 482         /* try to give a good number back based on if we have any free urbs at
 483          * this point in time */
 484         spin_lock_irqsave(&portdata->lock, flags);
 485         if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
 486                 spin_unlock_irqrestore(&portdata->lock, flags);
 487                 dbg("%s - write limit hit\n", __FUNCTION__);
 488                 return 0;
 489         }
 490         spin_unlock_irqrestore(&portdata->lock, flags);
 491
 492         return 2048;
 493 }
 494
 495 static int sierra_chars_in_buffer(struct usb_serial_port *port)
 496 {
 497         dbg("%s - port %d", __FUNCTION__, port->number);
 498
 499         /*
 500          * We can't really account for how much data we
 501          * have sent out, but hasn't made it through to the
 502          * device as we can't see the backend here, so just
 503          * tell the tty layer that everything is flushed.
 504          */
 505         return 0;
 506 }
 507
 508 static int sierra_open(struct usb_serial_port *port, struct file *filp)
 509 {
 510         struct sierra_port_private *portdata;
 511         struct usb_serial *serial = port->serial;
 512         int i;
 513         struct urb *urb;
 514         int result;
 515
 516         portdata = usb_get_serial_port_data(port);
 517
 518         dbg("%s", __FUNCTION__);
 519
 520         /* Set some sane defaults */
 521         portdata->rts_state = 1;
 522         portdata->dtr_state = 1;
 523
 524         /* Reset low level data toggle and start reading from endpoints */
 525         for (i = 0; i < N_IN_URB; i++) {
 526                 urb = portdata->in_urbs[i];
 527                 if (!urb)
 528                         continue;
 529                 if (urb->dev != serial->dev) {
 530                         dbg("%s: dev %p != %p", __FUNCTION__,
 531                                 urb->dev, serial->dev);
 532                         continue;
 533                 }
 534
 535                 /*
 536                  * make sure endpoint data toggle is synchronized with the
 537                  * device
 538                  */
 539                 usb_clear_halt(urb->dev, urb->pipe);
 540
 541                 result = usb_submit_urb(urb, GFP_KERNEL);
 542                 if (result) {
 543                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
 544                                 i, result, urb->transfer_buffer_length);
 545                 }
 546         }
 547
 548         port->tty->low_latency = 1;
 549
 550         sierra_send_setup(port);
 551
 552         /* start up the interrupt endpoint if we have one */
 553         if (port->interrupt_in_urb) {
 554                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 555                 if (result)
 556                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
 557                                 result);
 558         }
 559         return 0;
 560 }
 561
 562 static void sierra_close(struct usb_serial_port *port, struct file *filp)
 563 {
 564         int i;
 565         struct usb_serial *serial = port->serial;
 566         struct sierra_port_private *portdata;
 567
 568         dbg("%s", __FUNCTION__);
 569         portdata = usb_get_serial_port_data(port);
 570
 571         portdata->rts_state = 0;
 572         portdata->dtr_state = 0;
 573
 574         if (serial->dev) {
 575                 sierra_send_setup(port);
 576
 577                 /* Stop reading/writing urbs */
 578                 for (i = 0; i < N_IN_URB; i++)
 579                         usb_kill_urb(portdata->in_urbs[i]);
 580         }
 581
 582         usb_kill_urb(port->interrupt_in_urb);
 583
 584         port->tty = NULL;
 585 }
 586
 587 static int sierra_startup(struct usb_serial *serial)
 588 {
 589         struct usb_serial_port *port;
 590         struct sierra_port_private *portdata;
 591         struct urb *urb;
 592         int i;
 593         int j;
 594
 595         dbg("%s", __FUNCTION__);
 596
 597         /*Set Device mode to D0 */
 598         sierra_set_power_state(serial->dev, 0x0000);
 599
 600         /* Now setup per port private data */
 601         for (i = 0; i < serial->num_ports; i++) {
 602                 port = serial->port[i];
 603                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 604                 if (!portdata) {
 605                         dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
 606                                         __FUNCTION__, i);
 607                         return -ENOMEM;
 608                 }
 609                 spin_lock_init(&portdata->lock);
 610
 611                 usb_set_serial_port_data(port, portdata);
 612
 613                 /* initialize the in urbs */
 614                 for (j = 0; j < N_IN_URB; ++j) {
 615                         urb = usb_alloc_urb(0, GFP_KERNEL);
 616                         if (urb == NULL) {
 617                                 dbg("%s: alloc for in port failed.",
 618                                     __FUNCTION__);
 619                                 continue;
 620                         }
 621                         /* Fill URB using supplied data. */
 622                         usb_fill_bulk_urb(urb, serial->dev,
 623                                           usb_rcvbulkpipe(serial->dev,
 624                                                 port->bulk_in_endpointAddress),
 625                                           portdata->in_buffer[j], IN_BUFLEN,
 626                                           sierra_indat_callback, port);
 627                         portdata->in_urbs[j] = urb;
 628                 }
 629         }
 630
 631         return 0;
 632 }
 633
 634 static void sierra_shutdown(struct usb_serial *serial)
 635 {
 636         int i, j;
 637         struct usb_serial_port *port;
 638         struct sierra_port_private *portdata;
 639
 640         dbg("%s", __FUNCTION__);
 641
 642         for (i = 0; i < serial->num_ports; ++i) {
 643                 port = serial->port[i];
 644                 if (!port)
 645                         continue;
 646                 portdata = usb_get_serial_port_data(port);
 647                 if (!portdata)
 648                         continue;
 649
 650                 for (j = 0; j < N_IN_URB; j++) {
 651                         usb_kill_urb(portdata->in_urbs[j]);
 652                         usb_free_urb(portdata->in_urbs[j]);
 653                         portdata->in_urbs[j] = NULL;
 654                 }
 655                 kfree(portdata);
 656                 usb_set_serial_port_data(port, NULL);
 657         }
 658 }
 659
 660 static struct usb_serial_driver sierra_1port_device = {
 661         .driver = {
 662                 .owner =        THIS_MODULE,
 663                 .name =         "sierra1",
 664         },
 665         .description       = "Sierra USB modem (1 port)",
 666         .id_table          = id_table_1port,
 667         .usb_driver        = &sierra_driver,
 668         .num_interrupt_in  = NUM_DONT_CARE,
 669         .num_bulk_in       = 1,
 670         .num_bulk_out      = 1,
 671         .num_ports         = 1,
 672         .open              = sierra_open,
 673         .close             = sierra_close,
 674         .write             = sierra_write,
 675         .write_room        = sierra_write_room,
 676         .chars_in_buffer   = sierra_chars_in_buffer,
 677         .throttle          = sierra_rx_throttle,
 678         .unthrottle        = sierra_rx_unthrottle,
 679         .ioctl             = sierra_ioctl,
 680         .set_termios       = sierra_set_termios,
 681         .break_ctl         = sierra_break_ctl,
 682         .tiocmget          = sierra_tiocmget,
 683         .tiocmset          = sierra_tiocmset,
 684         .attach            = sierra_startup,
 685         .shutdown          = sierra_shutdown,
 686         .read_int_callback = sierra_instat_callback,
 687 };
 688
 689 static struct usb_serial_driver sierra_3port_device = {
 690         .driver = {
 691                 .owner =        THIS_MODULE,
 692                 .name =         "sierra3",
 693         },
 694         .description       = "Sierra USB modem (3 port)",
 695         .id_table          = id_table_3port,
 696         .usb_driver        = &sierra_driver,
 697         .num_interrupt_in  = NUM_DONT_CARE,
 698         .num_bulk_in       = 3,
 699         .num_bulk_out      = 3,
 700         .num_ports         = 3,
 701         .open              = sierra_open,
 702         .close             = sierra_close,
 703         .write             = sierra_write,
 704         .write_room        = sierra_write_room,
 705         .chars_in_buffer   = sierra_chars_in_buffer,
 706         .throttle          = sierra_rx_throttle,
 707         .unthrottle        = sierra_rx_unthrottle,
 708         .ioctl             = sierra_ioctl,
 709         .set_termios       = sierra_set_termios,
 710         .break_ctl         = sierra_break_ctl,
 711         .tiocmget          = sierra_tiocmget,
 712         .tiocmset          = sierra_tiocmset,
 713         .attach            = sierra_startup,
 714         .shutdown          = sierra_shutdown,
 715         .read_int_callback = sierra_instat_callback,
 716 };
 717
 718 /* Functions used by new usb-serial code. */
 719 static int __init sierra_init(void)
 720 {
 721         int retval;
 722         retval = usb_serial_register(&sierra_1port_device);
 723         if (retval)
 724                 goto failed_1port_device_register;
 725         retval = usb_serial_register(&sierra_3port_device);
 726         if (retval)
 727                 goto failed_3port_device_register;
 728
 729
 730         retval = usb_register(&sierra_driver);
 731         if (retval)
 732                 goto failed_driver_register;
 733
 734         info(DRIVER_DESC ": " DRIVER_VERSION);
 735
 736         return 0;
 737
 738 failed_driver_register:
 739         usb_serial_deregister(&sierra_3port_device);
 740 failed_3port_device_register:
 741         usb_serial_deregister(&sierra_1port_device);
 742 failed_1port_device_register:
 743         return retval;
 744 }
 745
 746 static void __exit sierra_exit(void)
 747 {
 748         usb_deregister (&sierra_driver);
 749         usb_serial_deregister(&sierra_1port_device);
 750         usb_serial_deregister(&sierra_3port_device);
 751 }
 752
 753 module_init(sierra_init);
 754 module_exit(sierra_exit);
 755
 756 MODULE_AUTHOR(DRIVER_AUTHOR);
 757 MODULE_DESCRIPTION(DRIVER_DESC);
 758 MODULE_VERSION(DRIVER_VERSION);
 759 MODULE_LICENSE("GPL");
 760
 761 #ifdef CONFIG_USB_DEBUG
 762 module_param(debug, bool, S_IRUGO | S_IWUSR);
 763 MODULE_PARM_DESC(debug, "Debug messages");
 764 #endif
 765