git.oblomov.eu Git - linux-2.6/blob - drivers/usb/serial/sierra.c

   1 /*
   2   USB Driver for Sierra Wireless
   3
   4   Copyright (C) 2006, 2007, 2008  Kevin Lloyd <klloyd@sierrawireless.com>
   5
   6   IMPORTANT DISCLAIMER: This driver is not commercially supported by
   7   Sierra Wireless. Use at your own risk.
   8
   9   This driver is free software; you can redistribute it and/or modify
  10   it under the terms of Version 2 of the GNU General Public License as
  11   published by the Free Software Foundation.
  12
  13   Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
  14   Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
  15 */
  16
  17 #define DRIVER_VERSION "v.1.3.2"
  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                 /* Otherwise the need to do non-composite mapping */
 266                 else {
 267                         if (port->bulk_out_endpointAddress == 2)
 268                                 interface = 0;
 269                         else if (port->bulk_out_endpointAddress == 4)
 270                                 interface = 1;
 271                         else if (port->bulk_out_endpointAddress == 5)
 272                                 interface = 2;
 273                 }
 274
 275                 return usb_control_msg(serial->dev,
 276                                 usb_rcvctrlpipe(serial->dev, 0),
 277                                 0x22, 0x21, val, interface,
 278                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
 279         }
 280
 281         return 0;
 282 }
 283
 284 static void sierra_set_termios(struct tty_struct *tty,
 285                 struct usb_serial_port *port, struct ktermios *old_termios)
 286 {
 287         dev_dbg(&port->dev, "%s", __func__);
 288         tty_termios_copy_hw(tty->termios, old_termios);
 289         sierra_send_setup(tty, port);
 290 }
 291
 292 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 293 {
 294         struct usb_serial_port *port = tty->driver_data;
 295         unsigned int value;
 296         struct sierra_port_private *portdata;
 297
 298         dev_dbg(&port->dev, "%s", __func__);
 299         portdata = usb_get_serial_port_data(port);
 300
 301         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 302                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 303                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 304                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 305                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 306                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 307
 308         return value;
 309 }
 310
 311 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
 312                         unsigned int set, unsigned int clear)
 313 {
 314         struct usb_serial_port *port = tty->driver_data;
 315         struct sierra_port_private *portdata;
 316
 317         portdata = usb_get_serial_port_data(port);
 318
 319         if (set & TIOCM_RTS)
 320                 portdata->rts_state = 1;
 321         if (set & TIOCM_DTR)
 322                 portdata->dtr_state = 1;
 323
 324         if (clear & TIOCM_RTS)
 325                 portdata->rts_state = 0;
 326         if (clear & TIOCM_DTR)
 327                 portdata->dtr_state = 0;
 328         return sierra_send_setup(tty, port);
 329 }
 330
 331 static void sierra_outdat_callback(struct urb *urb)
 332 {
 333         struct usb_serial_port *port = urb->context;
 334         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 335         int status = urb->status;
 336         unsigned long flags;
 337
 338         dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
 339
 340         /* free up the transfer buffer, as usb_free_urb() does not do this */
 341         kfree(urb->transfer_buffer);
 342
 343         if (status)
 344                 dev_dbg(&port->dev, "%s - nonzero write bulk status "
 345                     "received: %d", __func__, status);
 346
 347         spin_lock_irqsave(&portdata->lock, flags);
 348         --portdata->outstanding_urbs;
 349         spin_unlock_irqrestore(&portdata->lock, flags);
 350
 351         usb_serial_port_softint(port);
 352 }
 353
 354 /* Write */
 355 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 356                                         const unsigned char *buf, int count)
 357 {
 358         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 359         struct usb_serial *serial = port->serial;
 360         unsigned long flags;
 361         unsigned char *buffer;
 362         struct urb *urb;
 363         int status;
 364
 365         portdata = usb_get_serial_port_data(port);
 366
 367         dev_dbg(&port->dev, "%s: write (%d chars)", __func__, count);
 368
 369         spin_lock_irqsave(&portdata->lock, flags);
 370         if (portdata->outstanding_urbs > N_OUT_URB) {
 371                 spin_unlock_irqrestore(&portdata->lock, flags);
 372                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 373                 return 0;
 374         }
 375         portdata->outstanding_urbs++;
 376         spin_unlock_irqrestore(&portdata->lock, flags);
 377
 378         buffer = kmalloc(count, GFP_ATOMIC);
 379         if (!buffer) {
 380                 dev_err(&port->dev, "out of memory\n");
 381                 count = -ENOMEM;
 382                 goto error_no_buffer;
 383         }
 384
 385         urb = usb_alloc_urb(0, GFP_ATOMIC);
 386         if (!urb) {
 387                 dev_err(&port->dev, "no more free urbs\n");
 388                 count = -ENOMEM;
 389                 goto error_no_urb;
 390         }
 391
 392         memcpy(buffer, buf, count);
 393
 394         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 395
 396         usb_fill_bulk_urb(urb, serial->dev,
 397                           usb_sndbulkpipe(serial->dev,
 398                                           port->bulk_out_endpointAddress),
 399                           buffer, count, sierra_outdat_callback, port);
 400
 401         /* send it down the pipe */
 402         status = usb_submit_urb(urb, GFP_ATOMIC);
 403         if (status) {
 404                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 405                         "with status = %d\n", __func__, status);
 406                 count = status;
 407                 goto error;
 408         }
 409
 410         /* we are done with this urb, so let the host driver
 411          * really free it when it is finished with it */
 412         usb_free_urb(urb);
 413
 414         return count;
 415 error:
 416         usb_free_urb(urb);
 417 error_no_urb:
 418         kfree(buffer);
 419 error_no_buffer:
 420         spin_lock_irqsave(&portdata->lock, flags);
 421         --portdata->outstanding_urbs;
 422         spin_unlock_irqrestore(&portdata->lock, flags);
 423         return count;
 424 }
 425
 426 static void sierra_indat_callback(struct urb *urb)
 427 {
 428         int err;
 429         int endpoint;
 430         struct usb_serial_port *port;
 431         struct tty_struct *tty;
 432         unsigned char *data = urb->transfer_buffer;
 433         int status = urb->status;
 434
 435         dbg("%s: %p", __func__, urb);
 436
 437         endpoint = usb_pipeendpoint(urb->pipe);
 438         port =  urb->context;
 439
 440         if (status) {
 441                 dev_dbg(&port->dev, "%s: nonzero status: %d on"
 442                     " endpoint %02x.", __func__, status, endpoint);
 443         } else {
 444                 if (urb->actual_length) {
 445                         tty = tty_port_tty_get(&port->port);
 446                         tty_buffer_request_room(tty, urb->actual_length);
 447                         tty_insert_flip_string(tty, data, urb->actual_length);
 448                         tty_flip_buffer_push(tty);
 449                         tty_kref_put(tty);
 450                 } else
 451                         dev_dbg(&port->dev, "%s: empty read urb"
 452                                 " received", __func__);
 453
 454                 /* Resubmit urb so we continue receiving */
 455                 if (port->port.count && status != -ESHUTDOWN) {
 456                         err = usb_submit_urb(urb, GFP_ATOMIC);
 457                         if (err)
 458                                 dev_err(&port->dev, "resubmit read urb failed."
 459                                         "(%d)\n", err);
 460                 }
 461         }
 462         return;
 463 }
 464
 465 static void sierra_instat_callback(struct urb *urb)
 466 {
 467         int err;
 468         int status = urb->status;
 469         struct usb_serial_port *port =  urb->context;
 470         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 471         struct usb_serial *serial = port->serial;
 472
 473         dev_dbg(&port->dev, "%s", __func__);
 474         dev_dbg(&port->dev, "%s: urb %p port %p has data %p", __func__,
 475                 urb, port, portdata);
 476
 477         if (status == 0) {
 478                 struct usb_ctrlrequest *req_pkt =
 479                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 480
 481                 if (!req_pkt) {
 482                         dev_dbg(&port->dev, "%s: NULL req_pkt\n",
 483                                 __func__);
 484                         return;
 485                 }
 486                 if ((req_pkt->bRequestType == 0xA1) &&
 487                                 (req_pkt->bRequest == 0x20)) {
 488                         int old_dcd_state;
 489                         unsigned char signals = *((unsigned char *)
 490                                         urb->transfer_buffer +
 491                                         sizeof(struct usb_ctrlrequest));
 492                         struct tty_struct *tty;
 493
 494                         dev_dbg(&port->dev, "%s: signal x%x", __func__,
 495                                 signals);
 496
 497                         old_dcd_state = portdata->dcd_state;
 498                         portdata->cts_state = 1;
 499                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 500                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 501                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 502
 503                         tty = tty_port_tty_get(&port->port);
 504                         if (tty && !C_CLOCAL(tty) &&
 505                                         old_dcd_state && !portdata->dcd_state)
 506                                 tty_hangup(tty);
 507                         tty_kref_put(tty);
 508                 } else {
 509                         dev_dbg(&port->dev, "%s: type %x req %x",
 510                                 __func__, req_pkt->bRequestType,
 511                                 req_pkt->bRequest);
 512                 }
 513         } else
 514                 dev_dbg(&port->dev, "%s: error %d", __func__, status);
 515
 516         /* Resubmit urb so we continue receiving IRQ data */
 517         if (status != -ESHUTDOWN) {
 518                 urb->dev = serial->dev;
 519                 err = usb_submit_urb(urb, GFP_ATOMIC);
 520                 if (err)
 521                         dev_dbg(&port->dev, "%s: resubmit intr urb "
 522                                 "failed. (%d)", __func__, err);
 523         }
 524 }
 525
 526 static int sierra_write_room(struct tty_struct *tty)
 527 {
 528         struct usb_serial_port *port = tty->driver_data;
 529         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 530         unsigned long flags;
 531
 532         dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
 533
 534         /* try to give a good number back based on if we have any free urbs at
 535          * this point in time */
 536         spin_lock_irqsave(&portdata->lock, flags);
 537         if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
 538                 spin_unlock_irqrestore(&portdata->lock, flags);
 539                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 540                 return 0;
 541         }
 542         spin_unlock_irqrestore(&portdata->lock, flags);
 543
 544         return 2048;
 545 }
 546
 547 static int sierra_open(struct tty_struct *tty,
 548                         struct usb_serial_port *port, struct file *filp)
 549 {
 550         struct sierra_port_private *portdata;
 551         struct usb_serial *serial = port->serial;
 552         int i;
 553         struct urb *urb;
 554         int result;
 555
 556         portdata = usb_get_serial_port_data(port);
 557
 558         dev_dbg(&port->dev, "%s", __func__);
 559
 560         /* Set some sane defaults */
 561         portdata->rts_state = 1;
 562         portdata->dtr_state = 1;
 563
 564         /* Reset low level data toggle and start reading from endpoints */
 565         for (i = 0; i < N_IN_URB; i++) {
 566                 urb = portdata->in_urbs[i];
 567                 if (!urb)
 568                         continue;
 569                 if (urb->dev != serial->dev) {
 570                         dev_dbg(&port->dev, "%s: dev %p != %p",
 571                                  __func__, urb->dev, serial->dev);
 572                         continue;
 573                 }
 574
 575                 /*
 576                  * make sure endpoint data toggle is synchronized with the
 577                  * device
 578                  */
 579                 usb_clear_halt(urb->dev, urb->pipe);
 580
 581                 result = usb_submit_urb(urb, GFP_KERNEL);
 582                 if (result) {
 583                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
 584                                 i, result, urb->transfer_buffer_length);
 585                 }
 586         }
 587
 588         if (tty)
 589                 tty->low_latency = 1;
 590
 591         sierra_send_setup(tty, port);
 592
 593         /* start up the interrupt endpoint if we have one */
 594         if (port->interrupt_in_urb) {
 595                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 596                 if (result)
 597                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
 598                                 result);
 599         }
 600         return 0;
 601 }
 602
 603 static void sierra_close(struct tty_struct *tty,
 604                         struct usb_serial_port *port, struct file *filp)
 605 {
 606         int i;
 607         struct usb_serial *serial = port->serial;
 608         struct sierra_port_private *portdata;
 609
 610         dev_dbg(&port->dev, "%s", __func__);
 611         portdata = usb_get_serial_port_data(port);
 612
 613         portdata->rts_state = 0;
 614         portdata->dtr_state = 0;
 615
 616         if (serial->dev) {
 617                 mutex_lock(&serial->disc_mutex);
 618                 if (!serial->disconnected)
 619                         sierra_send_setup(tty, port);
 620                 mutex_unlock(&serial->disc_mutex);
 621
 622                 /* Stop reading/writing urbs */
 623                 for (i = 0; i < N_IN_URB; i++)
 624                         usb_kill_urb(portdata->in_urbs[i]);
 625         }
 626
 627         usb_kill_urb(port->interrupt_in_urb);
 628         tty_port_tty_set(&port->port, NULL);
 629 }
 630
 631 static int sierra_startup(struct usb_serial *serial)
 632 {
 633         struct usb_serial_port *port;
 634         struct sierra_port_private *portdata;
 635         struct urb *urb;
 636         int i;
 637         int j;
 638
 639         dev_dbg(&serial->dev->dev, "%s", __func__);
 640
 641         /* Set Device mode to D0 */
 642         sierra_set_power_state(serial->dev, 0x0000);
 643
 644         /* Check NMEA and set */
 645         if (nmea)
 646                 sierra_vsc_set_nmea(serial->dev, 1);
 647
 648         /* Now setup per port private data */
 649         for (i = 0; i < serial->num_ports; i++) {
 650                 port = serial->port[i];
 651                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 652                 if (!portdata) {
 653                         dev_dbg(&port->dev, "%s: kmalloc for "
 654                                 "sierra_port_private (%d) failed!.",
 655                                 __func__, i);
 656                         return -ENOMEM;
 657                 }
 658                 spin_lock_init(&portdata->lock);
 659                 for (j = 0; j < N_IN_URB; j++) {
 660                         portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
 661                         if (!portdata->in_buffer[j]) {
 662                                 for (--j; j >= 0; j--)
 663                                         kfree(portdata->in_buffer[j]);
 664                                 kfree(portdata);
 665                                 return -ENOMEM;
 666                         }
 667                 }
 668
 669                 usb_set_serial_port_data(port, portdata);
 670
 671                 /* initialize the in urbs */
 672                 for (j = 0; j < N_IN_URB; ++j) {
 673                         urb = usb_alloc_urb(0, GFP_KERNEL);
 674                         if (urb == NULL) {
 675                                 dev_dbg(&port->dev, "%s: alloc for in "
 676                                         "port failed.", __func__);
 677                                 continue;
 678                         }
 679                         /* Fill URB using supplied data. */
 680                         usb_fill_bulk_urb(urb, serial->dev,
 681                                           usb_rcvbulkpipe(serial->dev,
 682                                                 port->bulk_in_endpointAddress),
 683                                           portdata->in_buffer[j], IN_BUFLEN,
 684                                           sierra_indat_callback, port);
 685                         portdata->in_urbs[j] = urb;
 686                 }
 687         }
 688
 689         return 0;
 690 }
 691
 692 static void sierra_shutdown(struct usb_serial *serial)
 693 {
 694         int i, j;
 695         struct usb_serial_port *port;
 696         struct sierra_port_private *portdata;
 697
 698         dev_dbg(&serial->dev->dev, "%s", __func__);
 699
 700         for (i = 0; i < serial->num_ports; ++i) {
 701                 port = serial->port[i];
 702                 if (!port)
 703                         continue;
 704                 portdata = usb_get_serial_port_data(port);
 705                 if (!portdata)
 706                         continue;
 707
 708                 for (j = 0; j < N_IN_URB; j++) {
 709                         usb_kill_urb(portdata->in_urbs[j]);
 710                         usb_free_urb(portdata->in_urbs[j]);
 711                         kfree(portdata->in_buffer[j]);
 712                 }
 713                 kfree(portdata);
 714                 usb_set_serial_port_data(port, NULL);
 715         }
 716 }
 717
 718 static struct usb_serial_driver sierra_device = {
 719         .driver = {
 720                 .owner =        THIS_MODULE,
 721                 .name =         "sierra",
 722         },
 723         .description       = "Sierra USB modem",
 724         .id_table          = id_table,
 725         .usb_driver        = &sierra_driver,
 726         .calc_num_ports    = sierra_calc_num_ports,
 727         .probe             = sierra_probe,
 728         .open              = sierra_open,
 729         .close             = sierra_close,
 730         .write             = sierra_write,
 731         .write_room        = sierra_write_room,
 732         .set_termios       = sierra_set_termios,
 733         .tiocmget          = sierra_tiocmget,
 734         .tiocmset          = sierra_tiocmset,
 735         .attach            = sierra_startup,
 736         .shutdown          = sierra_shutdown,
 737         .read_int_callback = sierra_instat_callback,
 738 };
 739
 740 /* Functions used by new usb-serial code. */
 741 static int __init sierra_init(void)
 742 {
 743         int retval;
 744         retval = usb_serial_register(&sierra_device);
 745         if (retval)
 746                 goto failed_device_register;
 747
 748
 749         retval = usb_register(&sierra_driver);
 750         if (retval)
 751                 goto failed_driver_register;
 752
 753         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 754                DRIVER_DESC "\n");
 755
 756         return 0;
 757
 758 failed_driver_register:
 759         usb_serial_deregister(&sierra_device);
 760 failed_device_register:
 761         return retval;
 762 }
 763
 764 static void __exit sierra_exit(void)
 765 {
 766         usb_deregister(&sierra_driver);
 767         usb_serial_deregister(&sierra_device);
 768 }
 769
 770 module_init(sierra_init);
 771 module_exit(sierra_exit);
 772
 773 MODULE_AUTHOR(DRIVER_AUTHOR);
 774 MODULE_DESCRIPTION(DRIVER_DESC);
 775 MODULE_VERSION(DRIVER_VERSION);
 776 MODULE_LICENSE("GPL");
 777
 778 module_param(nmea, bool, S_IRUGO | S_IWUSR);
 779 MODULE_PARM_DESC(nmea, "NMEA streaming");
 780
 781 module_param(debug, bool, S_IRUGO | S_IWUSR);
 782 MODULE_PARM_DESC(debug, "Debug messages");