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.1.3.3"
  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
  34 /* per port private data */
  35 #define N_IN_URB        4
  36 #define N_OUT_URB       4
  37 #define IN_BUFLEN       4096
  38
  39 static int debug;
  40 static int nmea;
  41
  42 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
  43 {
  44         int result;
  45         dev_dbg(&udev->dev, "%s", __func__);
  46         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  47                         SWIMS_USB_REQUEST_SetPower,     /* __u8 request      */
  48                         USB_TYPE_VENDOR,                /* __u8 request type */
  49                         swiState,                       /* __u16 value       */
  50                         0,                              /* __u16 index       */
  51                         NULL,                           /* void *data        */
  52                         0,                              /* __u16 size        */
  53                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  54         return result;
  55 }
  56
  57 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
  58 {
  59         int result;
  60         dev_dbg(&udev->dev, "%s", __func__);
  61         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  62                         SWIMS_USB_REQUEST_SetNmea,      /* __u8 request      */
  63                         USB_TYPE_VENDOR,                /* __u8 request type */
  64                         enable,                         /* __u16 value       */
  65                         0x0000,                         /* __u16 index       */
  66                         NULL,                           /* void *data        */
  67                         0,                              /* __u16 size        */
  68                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  69         return result;
  70 }
  71
  72 static int sierra_calc_num_ports(struct usb_serial *serial)
  73 {
  74         int result;
  75         int *num_ports = usb_get_serial_data(serial);
  76         dev_dbg(&serial->dev->dev, "%s", __func__);
  77
  78         result = *num_ports;
  79
  80         if (result) {
  81                 kfree(num_ports);
  82                 usb_set_serial_data(serial, NULL);
  83         }
  84
  85         return result;
  86 }
  87
  88 static int sierra_calc_interface(struct usb_serial *serial)
  89 {
  90         int interface;
  91         struct usb_interface *p_interface;
  92         struct usb_host_interface *p_host_interface;
  93         dev_dbg(&serial->dev->dev, "%s", __func__);
  94
  95         /* Get the interface structure pointer from the serial struct */
  96         p_interface = serial->interface;
  97
  98         /* Get a pointer to the host interface structure */
  99         p_host_interface = p_interface->cur_altsetting;
 100
 101         /* read the interface descriptor for this active altsetting
 102          * to find out the interface number we are on
 103         */
 104         interface = p_host_interface->desc.bInterfaceNumber;
 105
 106         return interface;
 107 }
 108
 109 static int sierra_probe(struct usb_serial *serial,
 110                         const struct usb_device_id *id)
 111 {
 112         int result = 0;
 113         struct usb_device *udev;
 114         int *num_ports;
 115         u8 ifnum;
 116         u8 numendpoints;
 117
 118         dev_dbg(&serial->dev->dev, "%s", __func__);
 119
 120         num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
 121         if (!num_ports)
 122                 return -ENOMEM;
 123
 124         ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
 125         numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
 126         udev = serial->dev;
 127
 128         /* Figure out the interface number from the serial structure */
 129         ifnum = sierra_calc_interface(serial);
 130
 131         /*
 132          * If this interface supports more than 1 alternate
 133          * select the 2nd one
 134          */
 135         if (serial->interface->num_altsetting == 2) {
 136                 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
 137                         ifnum);
 138                 /* We know the alternate setting is 1 for the MC8785 */
 139                 usb_set_interface(udev, ifnum, 1);
 140         }
 141
 142         /* Dummy interface present on some SKUs should be ignored */
 143         if (ifnum == 0x99)
 144                 *num_ports = 0;
 145         else if (numendpoints <= 3)
 146                 *num_ports = 1;
 147         else
 148                 *num_ports = (numendpoints-1)/2;
 149
 150         /*
 151          * save off our num_ports info so that we can use it in the
 152          * calc_num_ports callback
 153          */
 154         usb_set_serial_data(serial, (void *)num_ports);
 155
 156         return result;
 157 }
 158
 159 static struct usb_device_id id_table [] = {
 160         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
 161         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 162         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 163         { USB_DEVICE(0x03f0, 0x1b1d) }, /* HP ev2200 a.k.a MC5720 */
 164         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 165         { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
 166         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 167         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 168         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 169         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
 170          /* Sierra Wireless C597 */
 171         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
 172          /* Sierra Wireless Device */
 173         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
 174         { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless Device */
 175         { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless Device */
 176         { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless Device */
 177
 178         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 179         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 180         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 181         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 182         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Lenovo) */
 183         { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
 184         { USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
 185         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 186         { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
 187         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
 188         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
 189         { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
 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, 0x6891, 0xFF, 0xFF, 0xFF)},
 208         /* Sierra Wireless Device */
 209         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
 210
 211         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
 212         { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
 213
 214         { }
 215 };
 216 MODULE_DEVICE_TABLE(usb, id_table);
 217
 218 static struct usb_driver sierra_driver = {
 219         .name       = "sierra",
 220         .probe      = usb_serial_probe,
 221         .disconnect = usb_serial_disconnect,
 222         .id_table   = id_table,
 223         .no_dynamic_id =        1,
 224 };
 225
 226 struct sierra_port_private {
 227         spinlock_t lock;        /* lock the structure */
 228         int outstanding_urbs;   /* number of out urbs in flight */
 229
 230         /* Input endpoints and buffers for this port */
 231         struct urb *in_urbs[N_IN_URB];
 232         char *in_buffer[N_IN_URB];
 233
 234         /* Settings for the port */
 235         int rts_state;  /* Handshaking pins (outputs) */
 236         int dtr_state;
 237         int cts_state;  /* Handshaking pins (inputs) */
 238         int dsr_state;
 239         int dcd_state;
 240         int ri_state;
 241 };
 242
 243 static int sierra_send_setup(struct tty_struct *tty,
 244                                                 struct usb_serial_port *port)
 245 {
 246         struct usb_serial *serial = port->serial;
 247         struct sierra_port_private *portdata;
 248         __u16 interface = 0;
 249
 250         dev_dbg(&port->dev, "%s", __func__);
 251
 252         portdata = usb_get_serial_port_data(port);
 253
 254         if (tty) {
 255                 int val = 0;
 256                 if (portdata->dtr_state)
 257                         val |= 0x01;
 258                 if (portdata->rts_state)
 259                         val |= 0x02;
 260
 261                 /* If composite device then properly report interface */
 262                 if (serial->num_ports == 1) {
 263                         interface = sierra_calc_interface(serial);
 264
 265                         /* Control message is sent only to interfaces with
 266                          * interrupt_in endpoints
 267                          */
 268                         if (port->interrupt_in_urb) {
 269                                 /* send control message */
 270                                 return usb_control_msg(serial->dev,
 271                                         usb_rcvctrlpipe(serial->dev, 0),
 272                                         0x22, 0x21, val, interface,
 273                                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 274                         }
 275                 }
 276
 277                 /* Otherwise the need to do non-composite mapping */
 278                 else {
 279                         if (port->bulk_out_endpointAddress == 2)
 280                                 interface = 0;
 281                         else if (port->bulk_out_endpointAddress == 4)
 282                                 interface = 1;
 283                         else if (port->bulk_out_endpointAddress == 5)
 284                                 interface = 2;
 285
 286                         return usb_control_msg(serial->dev,
 287                                 usb_rcvctrlpipe(serial->dev, 0),
 288                                 0x22, 0x21, val, interface,
 289                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
 290
 291                 }
 292         }
 293
 294         return 0;
 295 }
 296
 297 static void sierra_set_termios(struct tty_struct *tty,
 298                 struct usb_serial_port *port, struct ktermios *old_termios)
 299 {
 300         dev_dbg(&port->dev, "%s", __func__);
 301         tty_termios_copy_hw(tty->termios, old_termios);
 302         sierra_send_setup(tty, port);
 303 }
 304
 305 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 306 {
 307         struct usb_serial_port *port = tty->driver_data;
 308         unsigned int value;
 309         struct sierra_port_private *portdata;
 310
 311         dev_dbg(&port->dev, "%s", __func__);
 312         portdata = usb_get_serial_port_data(port);
 313
 314         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 315                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 316                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 317                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 318                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 319                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 320
 321         return value;
 322 }
 323
 324 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
 325                         unsigned int set, unsigned int clear)
 326 {
 327         struct usb_serial_port *port = tty->driver_data;
 328         struct sierra_port_private *portdata;
 329
 330         portdata = usb_get_serial_port_data(port);
 331
 332         if (set & TIOCM_RTS)
 333                 portdata->rts_state = 1;
 334         if (set & TIOCM_DTR)
 335                 portdata->dtr_state = 1;
 336
 337         if (clear & TIOCM_RTS)
 338                 portdata->rts_state = 0;
 339         if (clear & TIOCM_DTR)
 340                 portdata->dtr_state = 0;
 341         return sierra_send_setup(tty, port);
 342 }
 343
 344 static void sierra_outdat_callback(struct urb *urb)
 345 {
 346         struct usb_serial_port *port = urb->context;
 347         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 348         int status = urb->status;
 349         unsigned long flags;
 350
 351         dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
 352
 353         /* free up the transfer buffer, as usb_free_urb() does not do this */
 354         kfree(urb->transfer_buffer);
 355
 356         if (status)
 357                 dev_dbg(&port->dev, "%s - nonzero write bulk status "
 358                     "received: %d", __func__, status);
 359
 360         spin_lock_irqsave(&portdata->lock, flags);
 361         --portdata->outstanding_urbs;
 362         spin_unlock_irqrestore(&portdata->lock, flags);
 363
 364         usb_serial_port_softint(port);
 365 }
 366
 367 /* Write */
 368 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 369                                         const unsigned char *buf, int count)
 370 {
 371         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 372         struct usb_serial *serial = port->serial;
 373         unsigned long flags;
 374         unsigned char *buffer;
 375         struct urb *urb;
 376         int status;
 377
 378         portdata = usb_get_serial_port_data(port);
 379
 380         dev_dbg(&port->dev, "%s: write (%d chars)", __func__, count);
 381
 382         spin_lock_irqsave(&portdata->lock, flags);
 383         if (portdata->outstanding_urbs > N_OUT_URB) {
 384                 spin_unlock_irqrestore(&portdata->lock, flags);
 385                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 386                 return 0;
 387         }
 388         portdata->outstanding_urbs++;
 389         spin_unlock_irqrestore(&portdata->lock, flags);
 390
 391         buffer = kmalloc(count, GFP_ATOMIC);
 392         if (!buffer) {
 393                 dev_err(&port->dev, "out of memory\n");
 394                 count = -ENOMEM;
 395                 goto error_no_buffer;
 396         }
 397
 398         urb = usb_alloc_urb(0, GFP_ATOMIC);
 399         if (!urb) {
 400                 dev_err(&port->dev, "no more free urbs\n");
 401                 count = -ENOMEM;
 402                 goto error_no_urb;
 403         }
 404
 405         memcpy(buffer, buf, count);
 406
 407         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 408
 409         usb_fill_bulk_urb(urb, serial->dev,
 410                           usb_sndbulkpipe(serial->dev,
 411                                           port->bulk_out_endpointAddress),
 412                           buffer, count, sierra_outdat_callback, port);
 413
 414         /* send it down the pipe */
 415         status = usb_submit_urb(urb, GFP_ATOMIC);
 416         if (status) {
 417                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 418                         "with status = %d\n", __func__, status);
 419                 count = status;
 420                 goto error;
 421         }
 422
 423         /* we are done with this urb, so let the host driver
 424          * really free it when it is finished with it */
 425         usb_free_urb(urb);
 426
 427         return count;
 428 error:
 429         usb_free_urb(urb);
 430 error_no_urb:
 431         kfree(buffer);
 432 error_no_buffer:
 433         spin_lock_irqsave(&portdata->lock, flags);
 434         --portdata->outstanding_urbs;
 435         spin_unlock_irqrestore(&portdata->lock, flags);
 436         return count;
 437 }
 438
 439 static void sierra_indat_callback(struct urb *urb)
 440 {
 441         int err;
 442         int endpoint;
 443         struct usb_serial_port *port;
 444         struct tty_struct *tty;
 445         unsigned char *data = urb->transfer_buffer;
 446         int status = urb->status;
 447
 448         dbg("%s: %p", __func__, urb);
 449
 450         endpoint = usb_pipeendpoint(urb->pipe);
 451         port =  urb->context;
 452
 453         if (status) {
 454                 dev_dbg(&port->dev, "%s: nonzero status: %d on"
 455                     " endpoint %02x.", __func__, status, endpoint);
 456         } else {
 457                 if (urb->actual_length) {
 458                         tty = tty_port_tty_get(&port->port);
 459                         tty_buffer_request_room(tty, urb->actual_length);
 460                         tty_insert_flip_string(tty, data, urb->actual_length);
 461                         tty_flip_buffer_push(tty);
 462                         tty_kref_put(tty);
 463                 } else
 464                         dev_dbg(&port->dev, "%s: empty read urb"
 465                                 " received", __func__);
 466
 467                 /* Resubmit urb so we continue receiving */
 468                 if (port->port.count && status != -ESHUTDOWN) {
 469                         err = usb_submit_urb(urb, GFP_ATOMIC);
 470                         if (err)
 471                                 dev_err(&port->dev, "resubmit read urb failed."
 472                                         "(%d)\n", err);
 473                 }
 474         }
 475         return;
 476 }
 477
 478 static void sierra_instat_callback(struct urb *urb)
 479 {
 480         int err;
 481         int status = urb->status;
 482         struct usb_serial_port *port =  urb->context;
 483         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 484         struct usb_serial *serial = port->serial;
 485
 486         dev_dbg(&port->dev, "%s", __func__);
 487         dev_dbg(&port->dev, "%s: urb %p port %p has data %p", __func__,
 488                 urb, port, portdata);
 489
 490         if (status == 0) {
 491                 struct usb_ctrlrequest *req_pkt =
 492                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 493
 494                 if (!req_pkt) {
 495                         dev_dbg(&port->dev, "%s: NULL req_pkt\n",
 496                                 __func__);
 497                         return;
 498                 }
 499                 if ((req_pkt->bRequestType == 0xA1) &&
 500                                 (req_pkt->bRequest == 0x20)) {
 501                         int old_dcd_state;
 502                         unsigned char signals = *((unsigned char *)
 503                                         urb->transfer_buffer +
 504                                         sizeof(struct usb_ctrlrequest));
 505                         struct tty_struct *tty;
 506
 507                         dev_dbg(&port->dev, "%s: signal x%x", __func__,
 508                                 signals);
 509
 510                         old_dcd_state = portdata->dcd_state;
 511                         portdata->cts_state = 1;
 512                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 513                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 514                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 515
 516                         tty = tty_port_tty_get(&port->port);
 517                         if (tty && !C_CLOCAL(tty) &&
 518                                         old_dcd_state && !portdata->dcd_state)
 519                                 tty_hangup(tty);
 520                         tty_kref_put(tty);
 521                 } else {
 522                         dev_dbg(&port->dev, "%s: type %x req %x",
 523                                 __func__, req_pkt->bRequestType,
 524                                 req_pkt->bRequest);
 525                 }
 526         } else
 527                 dev_dbg(&port->dev, "%s: error %d", __func__, status);
 528
 529         /* Resubmit urb so we continue receiving IRQ data */
 530         if (status != -ESHUTDOWN) {
 531                 urb->dev = serial->dev;
 532                 err = usb_submit_urb(urb, GFP_ATOMIC);
 533                 if (err)
 534                         dev_dbg(&port->dev, "%s: resubmit intr urb "
 535                                 "failed. (%d)", __func__, err);
 536         }
 537 }
 538
 539 static int sierra_write_room(struct tty_struct *tty)
 540 {
 541         struct usb_serial_port *port = tty->driver_data;
 542         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 543         unsigned long flags;
 544
 545         dev_dbg(&port->dev, "%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                 dev_dbg(&port->dev, "%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_open(struct tty_struct *tty,
 561                         struct usb_serial_port *port, struct file *filp)
 562 {
 563         struct sierra_port_private *portdata;
 564         struct usb_serial *serial = port->serial;
 565         int i;
 566         struct urb *urb;
 567         int result;
 568
 569         portdata = usb_get_serial_port_data(port);
 570
 571         dev_dbg(&port->dev, "%s", __func__);
 572
 573         /* Set some sane defaults */
 574         portdata->rts_state = 1;
 575         portdata->dtr_state = 1;
 576
 577         /* Reset low level data toggle and start reading from endpoints */
 578         for (i = 0; i < N_IN_URB; i++) {
 579                 urb = portdata->in_urbs[i];
 580                 if (!urb)
 581                         continue;
 582                 if (urb->dev != serial->dev) {
 583                         dev_dbg(&port->dev, "%s: dev %p != %p",
 584                                  __func__, urb->dev, serial->dev);
 585                         continue;
 586                 }
 587
 588                 /*
 589                  * make sure endpoint data toggle is synchronized with the
 590                  * device
 591                  */
 592                 usb_clear_halt(urb->dev, urb->pipe);
 593
 594                 result = usb_submit_urb(urb, GFP_KERNEL);
 595                 if (result) {
 596                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
 597                                 i, result, urb->transfer_buffer_length);
 598                 }
 599         }
 600
 601         sierra_send_setup(tty, port);
 602
 603         /* start up the interrupt endpoint if we have one */
 604         if (port->interrupt_in_urb) {
 605                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 606                 if (result)
 607                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
 608                                 result);
 609         }
 610         return 0;
 611 }
 612
 613 static void sierra_close(struct tty_struct *tty,
 614                         struct usb_serial_port *port, struct file *filp)
 615 {
 616         int i;
 617         struct usb_serial *serial = port->serial;
 618         struct sierra_port_private *portdata;
 619
 620         dev_dbg(&port->dev, "%s", __func__);
 621         portdata = usb_get_serial_port_data(port);
 622
 623         portdata->rts_state = 0;
 624         portdata->dtr_state = 0;
 625
 626         if (serial->dev) {
 627                 mutex_lock(&serial->disc_mutex);
 628                 if (!serial->disconnected)
 629                         sierra_send_setup(tty, port);
 630                 mutex_unlock(&serial->disc_mutex);
 631
 632                 /* Stop reading/writing urbs */
 633                 for (i = 0; i < N_IN_URB; i++)
 634                         usb_kill_urb(portdata->in_urbs[i]);
 635         }
 636
 637         usb_kill_urb(port->interrupt_in_urb);
 638         tty_port_tty_set(&port->port, NULL);
 639 }
 640
 641 static int sierra_startup(struct usb_serial *serial)
 642 {
 643         struct usb_serial_port *port;
 644         struct sierra_port_private *portdata;
 645         struct urb *urb;
 646         int i;
 647         int j;
 648
 649         dev_dbg(&serial->dev->dev, "%s", __func__);
 650
 651         /* Set Device mode to D0 */
 652         sierra_set_power_state(serial->dev, 0x0000);
 653
 654         /* Check NMEA and set */
 655         if (nmea)
 656                 sierra_vsc_set_nmea(serial->dev, 1);
 657
 658         /* Now setup per port private data */
 659         for (i = 0; i < serial->num_ports; i++) {
 660                 port = serial->port[i];
 661                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 662                 if (!portdata) {
 663                         dev_dbg(&port->dev, "%s: kmalloc for "
 664                                 "sierra_port_private (%d) failed!.",
 665                                 __func__, i);
 666                         return -ENOMEM;
 667                 }
 668                 spin_lock_init(&portdata->lock);
 669                 for (j = 0; j < N_IN_URB; j++) {
 670                         portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
 671                         if (!portdata->in_buffer[j]) {
 672                                 for (--j; j >= 0; j--)
 673                                         kfree(portdata->in_buffer[j]);
 674                                 kfree(portdata);
 675                                 return -ENOMEM;
 676                         }
 677                 }
 678
 679                 usb_set_serial_port_data(port, portdata);
 680
 681                 /* initialize the in urbs */
 682                 for (j = 0; j < N_IN_URB; ++j) {
 683                         urb = usb_alloc_urb(0, GFP_KERNEL);
 684                         if (urb == NULL) {
 685                                 dev_dbg(&port->dev, "%s: alloc for in "
 686                                         "port failed.", __func__);
 687                                 continue;
 688                         }
 689                         /* Fill URB using supplied data. */
 690                         usb_fill_bulk_urb(urb, serial->dev,
 691                                           usb_rcvbulkpipe(serial->dev,
 692                                                 port->bulk_in_endpointAddress),
 693                                           portdata->in_buffer[j], IN_BUFLEN,
 694                                           sierra_indat_callback, port);
 695                         portdata->in_urbs[j] = urb;
 696                 }
 697         }
 698
 699         return 0;
 700 }
 701
 702 static void sierra_shutdown(struct usb_serial *serial)
 703 {
 704         int i, j;
 705         struct usb_serial_port *port;
 706         struct sierra_port_private *portdata;
 707
 708         dev_dbg(&serial->dev->dev, "%s", __func__);
 709
 710         for (i = 0; i < serial->num_ports; ++i) {
 711                 port = serial->port[i];
 712                 if (!port)
 713                         continue;
 714                 portdata = usb_get_serial_port_data(port);
 715                 if (!portdata)
 716                         continue;
 717
 718                 for (j = 0; j < N_IN_URB; j++) {
 719                         usb_kill_urb(portdata->in_urbs[j]);
 720                         usb_free_urb(portdata->in_urbs[j]);
 721                         kfree(portdata->in_buffer[j]);
 722                 }
 723                 kfree(portdata);
 724                 usb_set_serial_port_data(port, NULL);
 725         }
 726 }
 727
 728 static struct usb_serial_driver sierra_device = {
 729         .driver = {
 730                 .owner =        THIS_MODULE,
 731                 .name =         "sierra",
 732         },
 733         .description       = "Sierra USB modem",
 734         .id_table          = id_table,
 735         .usb_driver        = &sierra_driver,
 736         .calc_num_ports    = sierra_calc_num_ports,
 737         .probe             = sierra_probe,
 738         .open              = sierra_open,
 739         .close             = sierra_close,
 740         .write             = sierra_write,
 741         .write_room        = sierra_write_room,
 742         .set_termios       = sierra_set_termios,
 743         .tiocmget          = sierra_tiocmget,
 744         .tiocmset          = sierra_tiocmset,
 745         .attach            = sierra_startup,
 746         .shutdown          = sierra_shutdown,
 747         .read_int_callback = sierra_instat_callback,
 748 };
 749
 750 /* Functions used by new usb-serial code. */
 751 static int __init sierra_init(void)
 752 {
 753         int retval;
 754         retval = usb_serial_register(&sierra_device);
 755         if (retval)
 756                 goto failed_device_register;
 757
 758
 759         retval = usb_register(&sierra_driver);
 760         if (retval)
 761                 goto failed_driver_register;
 762
 763         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 764                DRIVER_DESC "\n");
 765
 766         return 0;
 767
 768 failed_driver_register:
 769         usb_serial_deregister(&sierra_device);
 770 failed_device_register:
 771         return retval;
 772 }
 773
 774 static void __exit sierra_exit(void)
 775 {
 776         usb_deregister(&sierra_driver);
 777         usb_serial_deregister(&sierra_device);
 778 }
 779
 780 module_init(sierra_init);
 781 module_exit(sierra_exit);
 782
 783 MODULE_AUTHOR(DRIVER_AUTHOR);
 784 MODULE_DESCRIPTION(DRIVER_DESC);
 785 MODULE_VERSION(DRIVER_VERSION);
 786 MODULE_LICENSE("GPL");
 787
 788 module_param(nmea, bool, S_IRUGO | S_IWUSR);
 789 MODULE_PARM_DESC(nmea, "NMEA streaming");
 790
 791 module_param(debug, bool, S_IRUGO | S_IWUSR);
 792 MODULE_PARM_DESC(debug, "Debug messages");