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.1.2.9c"
  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_SET_MODE_Modem            0x0001
  35
  36 /* per port private data */
  37 #define N_IN_URB        4
  38 #define N_OUT_URB       4
  39 #define IN_BUFLEN       4096
  40
  41 static int debug;
  42 static int nmea;
  43 static int truinstall = 1;
  44
  45 enum devicetype {
  46         DEVICE_3_PORT =         0,
  47         DEVICE_1_PORT =         1,
  48         DEVICE_INSTALLER =      2,
  49 };
  50
  51 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
  52 {
  53         int result;
  54         dev_dbg(&udev->dev, "%s", "SET POWER STATE\n");
  55         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  56                         SWIMS_USB_REQUEST_SetPower,     /* __u8 request      */
  57                         USB_TYPE_VENDOR,                /* __u8 request type */
  58                         swiState,                       /* __u16 value       */
  59                         0,                              /* __u16 index       */
  60                         NULL,                           /* void *data        */
  61                         0,                              /* __u16 size        */
  62                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  63         return result;
  64 }
  65
  66 static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode)
  67 {
  68         int result;
  69         dev_dbg(&udev->dev, "%s", "DEVICE MODE SWITCH\n");
  70         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  71                         SWIMS_USB_REQUEST_SetMode,      /* __u8 request      */
  72                         USB_TYPE_VENDOR,                /* __u8 request type */
  73                         eSWocMode,                      /* __u16 value       */
  74                         0x0000,                         /* __u16 index       */
  75                         NULL,                           /* void *data        */
  76                         0,                              /* __u16 size        */
  77                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  78         return result;
  79 }
  80
  81 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
  82 {
  83         int result;
  84         dev_dbg(&udev->dev, "%s", "NMEA Enable sent\n");
  85         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  86                         SWIMS_USB_REQUEST_SetNmea,      /* __u8 request      */
  87                         USB_TYPE_VENDOR,                /* __u8 request type */
  88                         enable,                         /* __u16 value       */
  89                         0x0000,                         /* __u16 index       */
  90                         NULL,                           /* void *data        */
  91                         0,                              /* __u16 size        */
  92                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  93         return result;
  94 }
  95
  96 static int sierra_calc_num_ports(struct usb_serial *serial)
  97 {
  98         int result;
  99         int *num_ports = usb_get_serial_data(serial);
 100
 101         result = *num_ports;
 102
 103         if (result) {
 104                 kfree(num_ports);
 105                 usb_set_serial_data(serial, NULL);
 106         }
 107
 108         return result;
 109 }
 110
 111 static int sierra_calc_interface(struct usb_serial *serial)
 112 {
 113                 int interface;
 114                 struct usb_interface *p_interface;
 115                 struct usb_host_interface *p_host_interface;
 116
 117                 /* Get the interface structure pointer from the serial struct */
 118                 p_interface = serial->interface;
 119
 120                 /* Get a pointer to the host interface structure */
 121                 p_host_interface = p_interface->cur_altsetting;
 122
 123                 /* read the interface descriptor for this active altsetting
 124                  * to find out the interface number we are on
 125                 */
 126                 interface = p_host_interface->desc.bInterfaceNumber;
 127
 128                 return interface;
 129 }
 130
 131 static int sierra_probe(struct usb_serial *serial,
 132                         const struct usb_device_id *id)
 133 {
 134         int result = 0;
 135         struct usb_device *udev;
 136         int *num_ports;
 137         u8 ifnum;
 138
 139         num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
 140         if (!num_ports)
 141                 return -ENOMEM;
 142
 143         ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
 144         udev = serial->dev;
 145
 146                 /* Figure out the interface number from the serial structure */
 147                 ifnum = sierra_calc_interface(serial);
 148
 149                 /*
 150                  * If this interface supports more than 1 alternate
 151                  * select the 2nd one
 152                  */
 153                 if (serial->interface->num_altsetting == 2) {
 154                         dev_dbg(&udev->dev,
 155                                 "Selecting alt setting for interface %d\n",
 156                                 ifnum);
 157
 158                         /* We know the alternate setting is 1 for the MC8785 */
 159                         usb_set_interface(udev, ifnum, 1);
 160                 }
 161
 162         /* Check if in installer mode */
 163         if (truinstall && id->driver_info == DEVICE_INSTALLER) {
 164                 dev_dbg(&udev->dev, "%s", "FOUND TRU-INSTALL DEVICE(SW)\n");
 165                 result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
 166                 /* Don't bind to the device when in installer mode */
 167                 kfree(num_ports);
 168                 return -EIO;
 169         } else if (id->driver_info == DEVICE_1_PORT)
 170                 *num_ports = 1;
 171         else if (ifnum == 0x99)
 172                 *num_ports = 0;
 173         else
 174                 *num_ports = 3;
 175         /*
 176          * save off our num_ports info so that we can use it in the
 177          * calc_num_ports callback
 178          */
 179         usb_set_serial_data(serial, (void *)num_ports);
 180
 181         return result;
 182 }
 183
 184 static struct usb_device_id id_table [] = {
 185         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
 186         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 187         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 188         { USB_DEVICE(0x0f30, 0x1b1d) }, /* Sierra Wireless MC5720 */
 189         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 190         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 191         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 192         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 193         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
 194         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) }, /* Sierra Wireless C597 */
 195
 196         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 197         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 198         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 199         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 200         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Thinkpad internal) */
 201         { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
 202         { USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
 203         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 204         { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
 205         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780*/
 206         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781*/
 207         { USB_DEVICE(0x1199, 0x683B), .driver_info = DEVICE_1_PORT },   /* Sierra Wireless MC8785 Composite*/
 208         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 209         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 210         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
 211         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
 212         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 213         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
 214         { USB_DEVICE(0x1199, 0x6859), .driver_info = DEVICE_1_PORT },   /* Sierra Wireless AirCard 885 E */
 215         { USB_DEVICE(0x1199, 0x685A), .driver_info = DEVICE_1_PORT },   /* Sierra Wireless AirCard 885 E */
 216
 217         { USB_DEVICE(0x1199, 0x6468) }, /* Sierra Wireless MP3G - EVDO */
 218         { USB_DEVICE(0x1199, 0x6469) }, /* Sierra Wireless MP3G - UMTS/HSPA */
 219
 220         { USB_DEVICE(0x1199, 0x0112), .driver_info = DEVICE_1_PORT }, /* Sierra Wireless AirCard 580 */
 221         { USB_DEVICE(0x0F3D, 0x0112), .driver_info = DEVICE_1_PORT }, /* Airprime/Sierra PC 5220 */
 222
 223         { USB_DEVICE(0x1199, 0x0FFF), .driver_info = DEVICE_INSTALLER},
 224         { }
 225 };
 226 MODULE_DEVICE_TABLE(usb, id_table);
 227
 228 static struct usb_driver sierra_driver = {
 229         .name       = "sierra",
 230         .probe      = usb_serial_probe,
 231         .disconnect = usb_serial_disconnect,
 232         .id_table   = id_table,
 233         .no_dynamic_id =        1,
 234 };
 235
 236 struct sierra_port_private {
 237         spinlock_t lock;        /* lock the structure */
 238         int outstanding_urbs;   /* number of out urbs in flight */
 239
 240         /* Input endpoints and buffers for this port */
 241         struct urb *in_urbs[N_IN_URB];
 242         char *in_buffer[N_IN_URB];
 243
 244         /* Settings for the port */
 245         int rts_state;  /* Handshaking pins (outputs) */
 246         int dtr_state;
 247         int cts_state;  /* Handshaking pins (inputs) */
 248         int dsr_state;
 249         int dcd_state;
 250         int ri_state;
 251 };
 252
 253 static int sierra_send_setup(struct usb_serial_port *port)
 254 {
 255         struct usb_serial *serial = port->serial;
 256         struct sierra_port_private *portdata;
 257         __u16 interface = 0;
 258
 259         dbg("%s", __func__);
 260
 261         portdata = usb_get_serial_port_data(port);
 262
 263         if (port->tty) {
 264                 int val = 0;
 265                 if (portdata->dtr_state)
 266                         val |= 0x01;
 267                 if (portdata->rts_state)
 268                         val |= 0x02;
 269
 270                 /* Determine which port is targeted */
 271                 if (port->bulk_out_endpointAddress == 2)
 272                         interface = 0;
 273                 else if (port->bulk_out_endpointAddress == 4)
 274                         interface = 1;
 275                 else if (port->bulk_out_endpointAddress == 5)
 276                         interface = 2;
 277
 278                 return usb_control_msg(serial->dev,
 279                                 usb_rcvctrlpipe(serial->dev, 0),
 280                                 0x22, 0x21, val, interface,
 281                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
 282         }
 283
 284         return 0;
 285 }
 286
 287 static void sierra_rx_throttle(struct usb_serial_port *port)
 288 {
 289         dbg("%s", __func__);
 290 }
 291
 292 static void sierra_rx_unthrottle(struct usb_serial_port *port)
 293 {
 294         dbg("%s", __func__);
 295 }
 296
 297 static void sierra_break_ctl(struct usb_serial_port *port, int break_state)
 298 {
 299         /* Unfortunately, I don't know how to send a break */
 300         dbg("%s", __func__);
 301 }
 302
 303 static void sierra_set_termios(struct usb_serial_port *port,
 304                         struct ktermios *old_termios)
 305 {
 306         dbg("%s", __func__);
 307         tty_termios_copy_hw(port->tty->termios, old_termios);
 308         sierra_send_setup(port);
 309 }
 310
 311 static int sierra_tiocmget(struct usb_serial_port *port, struct file *file)
 312 {
 313         unsigned int value;
 314         struct sierra_port_private *portdata;
 315
 316         portdata = usb_get_serial_port_data(port);
 317
 318         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 319                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 320                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 321                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 322                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 323                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 324
 325         return value;
 326 }
 327
 328 static int sierra_tiocmset(struct usb_serial_port *port, struct file *file,
 329                         unsigned int set, unsigned int clear)
 330 {
 331         struct sierra_port_private *portdata;
 332
 333         portdata = usb_get_serial_port_data(port);
 334
 335         if (set & TIOCM_RTS)
 336                 portdata->rts_state = 1;
 337         if (set & TIOCM_DTR)
 338                 portdata->dtr_state = 1;
 339
 340         if (clear & TIOCM_RTS)
 341                 portdata->rts_state = 0;
 342         if (clear & TIOCM_DTR)
 343                 portdata->dtr_state = 0;
 344         return sierra_send_setup(port);
 345 }
 346
 347 static int sierra_ioctl(struct usb_serial_port *port, struct file *file,
 348                         unsigned int cmd, unsigned long arg)
 349 {
 350         return -ENOIOCTLCMD;
 351 }
 352
 353 static void sierra_outdat_callback(struct urb *urb)
 354 {
 355         struct usb_serial_port *port = urb->context;
 356         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 357         int status = urb->status;
 358         unsigned long flags;
 359
 360         dbg("%s - port %d", __func__, port->number);
 361
 362         /* free up the transfer buffer, as usb_free_urb() does not do this */
 363         kfree(urb->transfer_buffer);
 364
 365         if (status)
 366                 dbg("%s - nonzero write bulk status received: %d",
 367                     __func__, status);
 368
 369         spin_lock_irqsave(&portdata->lock, flags);
 370         --portdata->outstanding_urbs;
 371         spin_unlock_irqrestore(&portdata->lock, flags);
 372
 373         usb_serial_port_softint(port);
 374 }
 375
 376 /* Write */
 377 static int sierra_write(struct usb_serial_port *port,
 378                         const unsigned char *buf, int count)
 379 {
 380         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 381         struct usb_serial *serial = port->serial;
 382         unsigned long flags;
 383         unsigned char *buffer;
 384         struct urb *urb;
 385         int status;
 386
 387         portdata = usb_get_serial_port_data(port);
 388
 389         dbg("%s: write (%d chars)", __func__, count);
 390
 391         spin_lock_irqsave(&portdata->lock, flags);
 392         if (portdata->outstanding_urbs > N_OUT_URB) {
 393                 spin_unlock_irqrestore(&portdata->lock, flags);
 394                 dbg("%s - write limit hit\n", __func__);
 395                 return 0;
 396         }
 397         portdata->outstanding_urbs++;
 398         spin_unlock_irqrestore(&portdata->lock, flags);
 399
 400         buffer = kmalloc(count, GFP_ATOMIC);
 401         if (!buffer) {
 402                 dev_err(&port->dev, "out of memory\n");
 403                 count = -ENOMEM;
 404                 goto error_no_buffer;
 405         }
 406
 407         urb = usb_alloc_urb(0, GFP_ATOMIC);
 408         if (!urb) {
 409                 dev_err(&port->dev, "no more free urbs\n");
 410                 count = -ENOMEM;
 411                 goto error_no_urb;
 412         }
 413
 414         memcpy(buffer, buf, count);
 415
 416         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 417
 418         usb_fill_bulk_urb(urb, serial->dev,
 419                           usb_sndbulkpipe(serial->dev,
 420                                           port->bulk_out_endpointAddress),
 421                           buffer, count, sierra_outdat_callback, port);
 422
 423         /* send it down the pipe */
 424         status = usb_submit_urb(urb, GFP_ATOMIC);
 425         if (status) {
 426                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 427                         "with status = %d\n", __func__, status);
 428                 count = status;
 429                 goto error;
 430         }
 431
 432         /* we are done with this urb, so let the host driver
 433          * really free it when it is finished with it */
 434         usb_free_urb(urb);
 435
 436         return count;
 437 error:
 438         usb_free_urb(urb);
 439 error_no_urb:
 440         kfree(buffer);
 441 error_no_buffer:
 442         spin_lock_irqsave(&portdata->lock, flags);
 443         --portdata->outstanding_urbs;
 444         spin_unlock_irqrestore(&portdata->lock, flags);
 445         return count;
 446 }
 447
 448 static void sierra_indat_callback(struct urb *urb)
 449 {
 450         int err;
 451         int endpoint;
 452         struct usb_serial_port *port;
 453         struct tty_struct *tty;
 454         unsigned char *data = urb->transfer_buffer;
 455         int status = urb->status;
 456
 457         dbg("%s: %p", __func__, urb);
 458
 459         endpoint = usb_pipeendpoint(urb->pipe);
 460         port =  urb->context;
 461
 462         if (status) {
 463                 dbg("%s: nonzero status: %d on endpoint %02x.",
 464                     __func__, status, endpoint);
 465         } else {
 466                 tty = port->tty;
 467                 if (urb->actual_length) {
 468                         tty_buffer_request_room(tty, urb->actual_length);
 469                         tty_insert_flip_string(tty, data, urb->actual_length);
 470                         tty_flip_buffer_push(tty);
 471                 } else {
 472                         dbg("%s: empty read urb received", __func__);
 473                 }
 474
 475                 /* Resubmit urb so we continue receiving */
 476                 if (port->open_count && status != -ESHUTDOWN) {
 477                         err = usb_submit_urb(urb, GFP_ATOMIC);
 478                         if (err)
 479                                 dev_err(&port->dev, "resubmit read urb failed."
 480                                         "(%d)\n", err);
 481                 }
 482         }
 483         return;
 484 }
 485
 486 static void sierra_instat_callback(struct urb *urb)
 487 {
 488         int err;
 489         int status = urb->status;
 490         struct usb_serial_port *port =  urb->context;
 491         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 492         struct usb_serial *serial = port->serial;
 493
 494         dbg("%s", __func__);
 495         dbg("%s: urb %p port %p has data %p", __func__, urb, port, portdata);
 496
 497         if (status == 0) {
 498                 struct usb_ctrlrequest *req_pkt =
 499                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 500
 501                 if (!req_pkt) {
 502                         dbg("%s: NULL req_pkt\n", __func__);
 503                         return;
 504                 }
 505                 if ((req_pkt->bRequestType == 0xA1) &&
 506                                 (req_pkt->bRequest == 0x20)) {
 507                         int old_dcd_state;
 508                         unsigned char signals = *((unsigned char *)
 509                                         urb->transfer_buffer +
 510                                         sizeof(struct usb_ctrlrequest));
 511
 512                         dbg("%s: signal x%x", __func__, signals);
 513
 514                         old_dcd_state = portdata->dcd_state;
 515                         portdata->cts_state = 1;
 516                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 517                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 518                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 519
 520                         if (port->tty && !C_CLOCAL(port->tty) &&
 521                                         old_dcd_state && !portdata->dcd_state)
 522                                 tty_hangup(port->tty);
 523                 } else {
 524                         dbg("%s: type %x req %x", __func__,
 525                                 req_pkt->bRequestType, req_pkt->bRequest);
 526                 }
 527         } else
 528                 dbg("%s: error %d", __func__, status);
 529
 530         /* Resubmit urb so we continue receiving IRQ data */
 531         if (status != -ESHUTDOWN) {
 532                 urb->dev = serial->dev;
 533                 err = usb_submit_urb(urb, GFP_ATOMIC);
 534                 if (err)
 535                         dbg("%s: resubmit intr urb failed. (%d)",
 536                                 __func__, err);
 537         }
 538 }
 539
 540 static int sierra_write_room(struct usb_serial_port *port)
 541 {
 542         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 543         unsigned long flags;
 544
 545         dbg("%s - port %d", __func__, port->number);
 546
 547         /* try to give a good number back based on if we have any free urbs at
 548          * this point in time */
 549         spin_lock_irqsave(&portdata->lock, flags);
 550         if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
 551                 spin_unlock_irqrestore(&portdata->lock, flags);
 552                 dbg("%s - write limit hit\n", __func__);
 553                 return 0;
 554         }
 555         spin_unlock_irqrestore(&portdata->lock, flags);
 556
 557         return 2048;
 558 }
 559
 560 static int sierra_chars_in_buffer(struct usb_serial_port *port)
 561 {
 562         dbg("%s - port %d", __func__, port->number);
 563
 564         /*
 565          * We can't really account for how much data we
 566          * have sent out, but hasn't made it through to the
 567          * device as we can't see the backend here, so just
 568          * tell the tty layer that everything is flushed.
 569          *
 570          * FIXME: should walk the outstanding urbs info
 571          */
 572         return 0;
 573 }
 574
 575 static int sierra_open(struct usb_serial_port *port, struct file *filp)
 576 {
 577         struct sierra_port_private *portdata;
 578         struct usb_serial *serial = port->serial;
 579         int i;
 580         struct urb *urb;
 581         int result;
 582
 583         portdata = usb_get_serial_port_data(port);
 584
 585         dbg("%s", __func__);
 586
 587         /* Set some sane defaults */
 588         portdata->rts_state = 1;
 589         portdata->dtr_state = 1;
 590
 591         /* Reset low level data toggle and start reading from endpoints */
 592         for (i = 0; i < N_IN_URB; i++) {
 593                 urb = portdata->in_urbs[i];
 594                 if (!urb)
 595                         continue;
 596                 if (urb->dev != serial->dev) {
 597                         dbg("%s: dev %p != %p", __func__,
 598                                 urb->dev, serial->dev);
 599                         continue;
 600                 }
 601
 602                 /*
 603                  * make sure endpoint data toggle is synchronized with the
 604                  * device
 605                  */
 606                 usb_clear_halt(urb->dev, urb->pipe);
 607
 608                 result = usb_submit_urb(urb, GFP_KERNEL);
 609                 if (result) {
 610                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
 611                                 i, result, urb->transfer_buffer_length);
 612                 }
 613         }
 614
 615         port->tty->low_latency = 1;
 616
 617         sierra_send_setup(port);
 618
 619         /* start up the interrupt endpoint if we have one */
 620         if (port->interrupt_in_urb) {
 621                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 622                 if (result)
 623                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
 624                                 result);
 625         }
 626         return 0;
 627 }
 628
 629 static void sierra_close(struct usb_serial_port *port, struct file *filp)
 630 {
 631         int i;
 632         struct usb_serial *serial = port->serial;
 633         struct sierra_port_private *portdata;
 634
 635         dbg("%s", __func__);
 636         portdata = usb_get_serial_port_data(port);
 637
 638         portdata->rts_state = 0;
 639         portdata->dtr_state = 0;
 640
 641         if (serial->dev) {
 642                 mutex_lock(&serial->disc_mutex);
 643                 if (!serial->disconnected)
 644                         sierra_send_setup(port);
 645                 mutex_unlock(&serial->disc_mutex);
 646
 647                 /* Stop reading/writing urbs */
 648                 for (i = 0; i < N_IN_URB; i++)
 649                         usb_kill_urb(portdata->in_urbs[i]);
 650         }
 651
 652         usb_kill_urb(port->interrupt_in_urb);
 653
 654         port->tty = NULL;
 655 }
 656
 657 static int sierra_startup(struct usb_serial *serial)
 658 {
 659         struct usb_serial_port *port;
 660         struct sierra_port_private *portdata;
 661         struct urb *urb;
 662         int i;
 663         int j;
 664
 665         dbg("%s", __func__);
 666
 667         /* Set Device mode to D0 */
 668         sierra_set_power_state(serial->dev, 0x0000);
 669
 670         /* Check NMEA and set */
 671         if (nmea)
 672                 sierra_vsc_set_nmea(serial->dev, 1);
 673
 674         /* Now setup per port private data */
 675         for (i = 0; i < serial->num_ports; i++) {
 676                 port = serial->port[i];
 677                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 678                 if (!portdata) {
 679                         dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
 680                                         __func__, i);
 681                         return -ENOMEM;
 682                 }
 683                 spin_lock_init(&portdata->lock);
 684                 for (j = 0; j < N_IN_URB; j++) {
 685                         portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
 686                         if (!portdata->in_buffer[j]) {
 687                                 for (--j; j >= 0; j--)
 688                                         kfree(portdata->in_buffer[j]);
 689                                 kfree(portdata);
 690                                 return -ENOMEM;
 691                         }
 692                 }
 693
 694                 usb_set_serial_port_data(port, portdata);
 695
 696                 /* initialize the in urbs */
 697                 for (j = 0; j < N_IN_URB; ++j) {
 698                         urb = usb_alloc_urb(0, GFP_KERNEL);
 699                         if (urb == NULL) {
 700                                 dbg("%s: alloc for in port failed.",
 701                                     __func__);
 702                                 continue;
 703                         }
 704                         /* Fill URB using supplied data. */
 705                         usb_fill_bulk_urb(urb, serial->dev,
 706                                           usb_rcvbulkpipe(serial->dev,
 707                                                 port->bulk_in_endpointAddress),
 708                                           portdata->in_buffer[j], IN_BUFLEN,
 709                                           sierra_indat_callback, port);
 710                         portdata->in_urbs[j] = urb;
 711                 }
 712         }
 713
 714         return 0;
 715 }
 716
 717 static void sierra_shutdown(struct usb_serial *serial)
 718 {
 719         int i, j;
 720         struct usb_serial_port *port;
 721         struct sierra_port_private *portdata;
 722
 723         dbg("%s", __func__);
 724
 725         for (i = 0; i < serial->num_ports; ++i) {
 726                 port = serial->port[i];
 727                 if (!port)
 728                         continue;
 729                 portdata = usb_get_serial_port_data(port);
 730                 if (!portdata)
 731                         continue;
 732
 733                 for (j = 0; j < N_IN_URB; j++) {
 734                         usb_kill_urb(portdata->in_urbs[j]);
 735                         usb_free_urb(portdata->in_urbs[j]);
 736                         kfree(portdata->in_buffer[j]);
 737                 }
 738                 kfree(portdata);
 739                 usb_set_serial_port_data(port, NULL);
 740         }
 741 }
 742
 743 static struct usb_serial_driver sierra_device = {
 744         .driver = {
 745                 .owner =        THIS_MODULE,
 746                 .name =         "sierra1",
 747         },
 748         .description       = "Sierra USB modem",
 749         .id_table          = id_table,
 750         .usb_driver        = &sierra_driver,
 751         .calc_num_ports    = sierra_calc_num_ports,
 752         .probe             = sierra_probe,
 753         .open              = sierra_open,
 754         .close             = sierra_close,
 755         .write             = sierra_write,
 756         .write_room        = sierra_write_room,
 757         .chars_in_buffer   = sierra_chars_in_buffer,
 758         .throttle          = sierra_rx_throttle,
 759         .unthrottle        = sierra_rx_unthrottle,
 760         .ioctl             = sierra_ioctl,
 761         .set_termios       = sierra_set_termios,
 762         .break_ctl         = sierra_break_ctl,
 763         .tiocmget          = sierra_tiocmget,
 764         .tiocmset          = sierra_tiocmset,
 765         .attach            = sierra_startup,
 766         .shutdown          = sierra_shutdown,
 767         .read_int_callback = sierra_instat_callback,
 768 };
 769
 770 /* Functions used by new usb-serial code. */
 771 static int __init sierra_init(void)
 772 {
 773         int retval;
 774         retval = usb_serial_register(&sierra_device);
 775         if (retval)
 776                 goto failed_device_register;
 777
 778
 779         retval = usb_register(&sierra_driver);
 780         if (retval)
 781                 goto failed_driver_register;
 782
 783         info(DRIVER_DESC ": " DRIVER_VERSION);
 784
 785         return 0;
 786
 787 failed_driver_register:
 788         usb_serial_deregister(&sierra_device);
 789 failed_device_register:
 790         return retval;
 791 }
 792
 793 static void __exit sierra_exit(void)
 794 {
 795         usb_deregister (&sierra_driver);
 796         usb_serial_deregister(&sierra_device);
 797 }
 798
 799 module_init(sierra_init);
 800 module_exit(sierra_exit);
 801
 802 MODULE_AUTHOR(DRIVER_AUTHOR);
 803 MODULE_DESCRIPTION(DRIVER_DESC);
 804 MODULE_VERSION(DRIVER_VERSION);
 805 MODULE_LICENSE("GPL");
 806
 807 module_param(truinstall, bool, 0);
 808 MODULE_PARM_DESC(truinstall, "TRU-Install support");
 809
 810 module_param(nmea, bool, 0);
 811 MODULE_PARM_DESC(nmea, "NMEA streaming");
 812
 813 #ifdef CONFIG_USB_DEBUG
 814 module_param(debug, bool, S_IRUGO | S_IWUSR);
 815 MODULE_PARM_DESC(debug, "Debug messages");
 816 #endif
 817