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(0x0f30, 0x1b1d) }, /* Sierra Wireless 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, 0x683B) }, /* Sierra Wireless MC8785 Composite */
 190         { USB_DEVICE(0x1199, 0x683C) }, /* Sierra Wireless MC8790 */
 191         { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8790 */
 192         { USB_DEVICE(0x1199, 0x683E) }, /* Sierra Wireless MC8790 */
 193         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 194         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 195         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
 196         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
 197         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 198         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
 199         { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
 200         { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
 201         /* Sierra Wireless C885 */
 202         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
 203         /* Sierra Wireless Device */
 204         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
 205         /* Sierra Wireless Device */
 206         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
 207         /* Sierra Wireless Device */
 208         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
 209
 210         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
 211         { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
 212
 213         { }
 214 };
 215 MODULE_DEVICE_TABLE(usb, id_table);
 216
 217 static struct usb_driver sierra_driver = {
 218         .name       = "sierra",
 219         .probe      = usb_serial_probe,
 220         .disconnect = usb_serial_disconnect,
 221         .id_table   = id_table,
 222         .no_dynamic_id =        1,
 223 };
 224
 225 struct sierra_port_private {
 226         spinlock_t lock;        /* lock the structure */
 227         int outstanding_urbs;   /* number of out urbs in flight */
 228
 229         /* Input endpoints and buffers for this port */
 230         struct urb *in_urbs[N_IN_URB];
 231         char *in_buffer[N_IN_URB];
 232
 233         /* Settings for the port */
 234         int rts_state;  /* Handshaking pins (outputs) */
 235         int dtr_state;
 236         int cts_state;  /* Handshaking pins (inputs) */
 237         int dsr_state;
 238         int dcd_state;
 239         int ri_state;
 240 };
 241
 242 static int sierra_send_setup(struct tty_struct *tty,
 243                                                 struct usb_serial_port *port)
 244 {
 245         struct usb_serial *serial = port->serial;
 246         struct sierra_port_private *portdata;
 247         __u16 interface = 0;
 248
 249         dbg("%s", __func__);
 250
 251         portdata = usb_get_serial_port_data(port);
 252
 253         if (tty) {
 254                 int val = 0;
 255                 if (portdata->dtr_state)
 256                         val |= 0x01;
 257                 if (portdata->rts_state)
 258                         val |= 0x02;
 259
 260                 /* If composite device then properly report interface */
 261                 if (serial->num_ports == 1)
 262                         interface = sierra_calc_interface(serial);
 263
 264                 /* Otherwise the need to do non-composite mapping */
 265                 else {
 266                         if (port->bulk_out_endpointAddress == 2)
 267                                 interface = 0;
 268                         else if (port->bulk_out_endpointAddress == 4)
 269                                 interface = 1;
 270                         else if (port->bulk_out_endpointAddress == 5)
 271                                 interface = 2;
 272                 }
 273
 274                 return usb_control_msg(serial->dev,
 275                                 usb_rcvctrlpipe(serial->dev, 0),
 276                                 0x22, 0x21, val, interface,
 277                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
 278         }
 279
 280         return 0;
 281 }
 282
 283 static void sierra_set_termios(struct tty_struct *tty,
 284                 struct usb_serial_port *port, struct ktermios *old_termios)
 285 {
 286         dbg("%s", __func__);
 287         tty_termios_copy_hw(tty->termios, old_termios);
 288         sierra_send_setup(tty, port);
 289 }
 290
 291 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 292 {
 293         struct usb_serial_port *port = tty->driver_data;
 294         unsigned int value;
 295         struct sierra_port_private *portdata;
 296
 297         portdata = usb_get_serial_port_data(port);
 298
 299         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 300                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 301                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 302                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 303                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 304                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 305
 306         return value;
 307 }
 308
 309 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
 310                         unsigned int set, unsigned int clear)
 311 {
 312         struct usb_serial_port *port = tty->driver_data;
 313         struct sierra_port_private *portdata;
 314
 315         portdata = usb_get_serial_port_data(port);
 316
 317         if (set & TIOCM_RTS)
 318                 portdata->rts_state = 1;
 319         if (set & TIOCM_DTR)
 320                 portdata->dtr_state = 1;
 321
 322         if (clear & TIOCM_RTS)
 323                 portdata->rts_state = 0;
 324         if (clear & TIOCM_DTR)
 325                 portdata->dtr_state = 0;
 326         return sierra_send_setup(tty, port);
 327 }
 328
 329 static void sierra_outdat_callback(struct urb *urb)
 330 {
 331         struct usb_serial_port *port = urb->context;
 332         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 333         int status = urb->status;
 334         unsigned long flags;
 335
 336         dbg("%s - port %d", __func__, port->number);
 337
 338         /* free up the transfer buffer, as usb_free_urb() does not do this */
 339         kfree(urb->transfer_buffer);
 340
 341         if (status)
 342                 dbg("%s - nonzero write bulk status received: %d",
 343                     __func__, status);
 344
 345         spin_lock_irqsave(&portdata->lock, flags);
 346         --portdata->outstanding_urbs;
 347         spin_unlock_irqrestore(&portdata->lock, flags);
 348
 349         usb_serial_port_softint(port);
 350 }
 351
 352 /* Write */
 353 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 354                                         const unsigned char *buf, int count)
 355 {
 356         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 357         struct usb_serial *serial = port->serial;
 358         unsigned long flags;
 359         unsigned char *buffer;
 360         struct urb *urb;
 361         int status;
 362
 363         portdata = usb_get_serial_port_data(port);
 364
 365         dbg("%s: write (%d chars)", __func__, count);
 366
 367         spin_lock_irqsave(&portdata->lock, flags);
 368         if (portdata->outstanding_urbs > N_OUT_URB) {
 369                 spin_unlock_irqrestore(&portdata->lock, flags);
 370                 dbg("%s - write limit hit\n", __func__);
 371                 return 0;
 372         }
 373         portdata->outstanding_urbs++;
 374         spin_unlock_irqrestore(&portdata->lock, flags);
 375
 376         buffer = kmalloc(count, GFP_ATOMIC);
 377         if (!buffer) {
 378                 dev_err(&port->dev, "out of memory\n");
 379                 count = -ENOMEM;
 380                 goto error_no_buffer;
 381         }
 382
 383         urb = usb_alloc_urb(0, GFP_ATOMIC);
 384         if (!urb) {
 385                 dev_err(&port->dev, "no more free urbs\n");
 386                 count = -ENOMEM;
 387                 goto error_no_urb;
 388         }
 389
 390         memcpy(buffer, buf, count);
 391
 392         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 393
 394         usb_fill_bulk_urb(urb, serial->dev,
 395                           usb_sndbulkpipe(serial->dev,
 396                                           port->bulk_out_endpointAddress),
 397                           buffer, count, sierra_outdat_callback, port);
 398
 399         /* send it down the pipe */
 400         status = usb_submit_urb(urb, GFP_ATOMIC);
 401         if (status) {
 402                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 403                         "with status = %d\n", __func__, status);
 404                 count = status;
 405                 goto error;
 406         }
 407
 408         /* we are done with this urb, so let the host driver
 409          * really free it when it is finished with it */
 410         usb_free_urb(urb);
 411
 412         return count;
 413 error:
 414         usb_free_urb(urb);
 415 error_no_urb:
 416         kfree(buffer);
 417 error_no_buffer:
 418         spin_lock_irqsave(&portdata->lock, flags);
 419         --portdata->outstanding_urbs;
 420         spin_unlock_irqrestore(&portdata->lock, flags);
 421         return count;
 422 }
 423
 424 static void sierra_indat_callback(struct urb *urb)
 425 {
 426         int err;
 427         int endpoint;
 428         struct usb_serial_port *port;
 429         struct tty_struct *tty;
 430         unsigned char *data = urb->transfer_buffer;
 431         int status = urb->status;
 432
 433         dbg("%s: %p", __func__, urb);
 434
 435         endpoint = usb_pipeendpoint(urb->pipe);
 436         port =  urb->context;
 437
 438         if (status) {
 439                 dbg("%s: nonzero status: %d on endpoint %02x.",
 440                     __func__, status, endpoint);
 441         } else {
 442                 tty = port->port.tty;
 443                 if (urb->actual_length) {
 444                         tty_buffer_request_room(tty, urb->actual_length);
 445                         tty_insert_flip_string(tty, data, urb->actual_length);
 446                         tty_flip_buffer_push(tty);
 447                 } else {
 448                         dbg("%s: empty read urb received", __func__);
 449                 }
 450
 451                 /* Resubmit urb so we continue receiving */
 452                 if (port->port.count && status != -ESHUTDOWN) {
 453                         err = usb_submit_urb(urb, GFP_ATOMIC);
 454                         if (err)
 455                                 dev_err(&port->dev, "resubmit read urb failed."
 456                                         "(%d)\n", err);
 457                 }
 458         }
 459         return;
 460 }
 461
 462 static void sierra_instat_callback(struct urb *urb)
 463 {
 464         int err;
 465         int status = urb->status;
 466         struct usb_serial_port *port =  urb->context;
 467         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 468         struct usb_serial *serial = port->serial;
 469
 470         dbg("%s", __func__);
 471         dbg("%s: urb %p port %p has data %p", __func__, urb, port, portdata);
 472
 473         if (status == 0) {
 474                 struct usb_ctrlrequest *req_pkt =
 475                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 476
 477                 if (!req_pkt) {
 478                         dbg("%s: NULL req_pkt\n", __func__);
 479                         return;
 480                 }
 481                 if ((req_pkt->bRequestType == 0xA1) &&
 482                                 (req_pkt->bRequest == 0x20)) {
 483                         int old_dcd_state;
 484                         unsigned char signals = *((unsigned char *)
 485                                         urb->transfer_buffer +
 486                                         sizeof(struct usb_ctrlrequest));
 487
 488                         dbg("%s: signal x%x", __func__, signals);
 489
 490                         old_dcd_state = portdata->dcd_state;
 491                         portdata->cts_state = 1;
 492                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 493                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 494                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 495
 496                         if (port->port.tty && !C_CLOCAL(port->port.tty) &&
 497                                         old_dcd_state && !portdata->dcd_state)
 498                                 tty_hangup(port->port.tty);
 499                 } else {
 500                         dbg("%s: type %x req %x", __func__,
 501                                 req_pkt->bRequestType, req_pkt->bRequest);
 502                 }
 503         } else
 504                 dbg("%s: error %d", __func__, status);
 505
 506         /* Resubmit urb so we continue receiving IRQ data */
 507         if (status != -ESHUTDOWN) {
 508                 urb->dev = serial->dev;
 509                 err = usb_submit_urb(urb, GFP_ATOMIC);
 510                 if (err)
 511                         dbg("%s: resubmit intr urb failed. (%d)",
 512                                 __func__, err);
 513         }
 514 }
 515
 516 static int sierra_write_room(struct tty_struct *tty)
 517 {
 518         struct usb_serial_port *port = tty->driver_data;
 519         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 520         unsigned long flags;
 521
 522         dbg("%s - port %d", __func__, port->number);
 523
 524         /* try to give a good number back based on if we have any free urbs at
 525          * this point in time */
 526         spin_lock_irqsave(&portdata->lock, flags);
 527         if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
 528                 spin_unlock_irqrestore(&portdata->lock, flags);
 529                 dbg("%s - write limit hit\n", __func__);
 530                 return 0;
 531         }
 532         spin_unlock_irqrestore(&portdata->lock, flags);
 533
 534         return 2048;
 535 }
 536
 537 static int sierra_open(struct tty_struct *tty,
 538                         struct usb_serial_port *port, struct file *filp)
 539 {
 540         struct sierra_port_private *portdata;
 541         struct usb_serial *serial = port->serial;
 542         int i;
 543         struct urb *urb;
 544         int result;
 545
 546         portdata = usb_get_serial_port_data(port);
 547
 548         dbg("%s", __func__);
 549
 550         /* Set some sane defaults */
 551         portdata->rts_state = 1;
 552         portdata->dtr_state = 1;
 553
 554         /* Reset low level data toggle and start reading from endpoints */
 555         for (i = 0; i < N_IN_URB; i++) {
 556                 urb = portdata->in_urbs[i];
 557                 if (!urb)
 558                         continue;
 559                 if (urb->dev != serial->dev) {
 560                         dbg("%s: dev %p != %p", __func__,
 561                                 urb->dev, serial->dev);
 562                         continue;
 563                 }
 564
 565                 /*
 566                  * make sure endpoint data toggle is synchronized with the
 567                  * device
 568                  */
 569                 usb_clear_halt(urb->dev, urb->pipe);
 570
 571                 result = usb_submit_urb(urb, GFP_KERNEL);
 572                 if (result) {
 573                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
 574                                 i, result, urb->transfer_buffer_length);
 575                 }
 576         }
 577
 578         if (tty)
 579                 tty->low_latency = 1;
 580
 581         sierra_send_setup(tty, port);
 582
 583         /* start up the interrupt endpoint if we have one */
 584         if (port->interrupt_in_urb) {
 585                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 586                 if (result)
 587                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
 588                                 result);
 589         }
 590         return 0;
 591 }
 592
 593 static void sierra_close(struct tty_struct *tty,
 594                         struct usb_serial_port *port, struct file *filp)
 595 {
 596         int i;
 597         struct usb_serial *serial = port->serial;
 598         struct sierra_port_private *portdata;
 599
 600         dbg("%s", __func__);
 601         portdata = usb_get_serial_port_data(port);
 602
 603         portdata->rts_state = 0;
 604         portdata->dtr_state = 0;
 605
 606         if (serial->dev) {
 607                 mutex_lock(&serial->disc_mutex);
 608                 if (!serial->disconnected)
 609                         sierra_send_setup(tty, port);
 610                 mutex_unlock(&serial->disc_mutex);
 611
 612                 /* Stop reading/writing urbs */
 613                 for (i = 0; i < N_IN_URB; i++)
 614                         usb_kill_urb(portdata->in_urbs[i]);
 615         }
 616
 617         usb_kill_urb(port->interrupt_in_urb);
 618
 619         port->port.tty = NULL;  /* FIXME */
 620 }
 621
 622 static int sierra_startup(struct usb_serial *serial)
 623 {
 624         struct usb_serial_port *port;
 625         struct sierra_port_private *portdata;
 626         struct urb *urb;
 627         int i;
 628         int j;
 629
 630         dbg("%s", __func__);
 631
 632         /* Set Device mode to D0 */
 633         sierra_set_power_state(serial->dev, 0x0000);
 634
 635         /* Check NMEA and set */
 636         if (nmea)
 637                 sierra_vsc_set_nmea(serial->dev, 1);
 638
 639         /* Now setup per port private data */
 640         for (i = 0; i < serial->num_ports; i++) {
 641                 port = serial->port[i];
 642                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 643                 if (!portdata) {
 644                         dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
 645                                         __func__, i);
 646                         return -ENOMEM;
 647                 }
 648                 spin_lock_init(&portdata->lock);
 649                 for (j = 0; j < N_IN_URB; j++) {
 650                         portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
 651                         if (!portdata->in_buffer[j]) {
 652                                 for (--j; j >= 0; j--)
 653                                         kfree(portdata->in_buffer[j]);
 654                                 kfree(portdata);
 655                                 return -ENOMEM;
 656                         }
 657                 }
 658
 659                 usb_set_serial_port_data(port, portdata);
 660
 661                 /* initialize the in urbs */
 662                 for (j = 0; j < N_IN_URB; ++j) {
 663                         urb = usb_alloc_urb(0, GFP_KERNEL);
 664                         if (urb == NULL) {
 665                                 dbg("%s: alloc for in port failed.",
 666                                     __func__);
 667                                 continue;
 668                         }
 669                         /* Fill URB using supplied data. */
 670                         usb_fill_bulk_urb(urb, serial->dev,
 671                                           usb_rcvbulkpipe(serial->dev,
 672                                                 port->bulk_in_endpointAddress),
 673                                           portdata->in_buffer[j], IN_BUFLEN,
 674                                           sierra_indat_callback, port);
 675                         portdata->in_urbs[j] = urb;
 676                 }
 677         }
 678
 679         return 0;
 680 }
 681
 682 static void sierra_shutdown(struct usb_serial *serial)
 683 {
 684         int i, j;
 685         struct usb_serial_port *port;
 686         struct sierra_port_private *portdata;
 687
 688         dbg("%s", __func__);
 689
 690         for (i = 0; i < serial->num_ports; ++i) {
 691                 port = serial->port[i];
 692                 if (!port)
 693                         continue;
 694                 portdata = usb_get_serial_port_data(port);
 695                 if (!portdata)
 696                         continue;
 697
 698                 for (j = 0; j < N_IN_URB; j++) {
 699                         usb_kill_urb(portdata->in_urbs[j]);
 700                         usb_free_urb(portdata->in_urbs[j]);
 701                         kfree(portdata->in_buffer[j]);
 702                 }
 703                 kfree(portdata);
 704                 usb_set_serial_port_data(port, NULL);
 705         }
 706 }
 707
 708 static struct usb_serial_driver sierra_device = {
 709         .driver = {
 710                 .owner =        THIS_MODULE,
 711                 .name =         "sierra",
 712         },
 713         .description       = "Sierra USB modem",
 714         .id_table          = id_table,
 715         .usb_driver        = &sierra_driver,
 716         .calc_num_ports    = sierra_calc_num_ports,
 717         .probe             = sierra_probe,
 718         .open              = sierra_open,
 719         .close             = sierra_close,
 720         .write             = sierra_write,
 721         .write_room        = sierra_write_room,
 722         .set_termios       = sierra_set_termios,
 723         .tiocmget          = sierra_tiocmget,
 724         .tiocmset          = sierra_tiocmset,
 725         .attach            = sierra_startup,
 726         .shutdown          = sierra_shutdown,
 727         .read_int_callback = sierra_instat_callback,
 728 };
 729
 730 /* Functions used by new usb-serial code. */
 731 static int __init sierra_init(void)
 732 {
 733         int retval;
 734         retval = usb_serial_register(&sierra_device);
 735         if (retval)
 736                 goto failed_device_register;
 737
 738
 739         retval = usb_register(&sierra_driver);
 740         if (retval)
 741                 goto failed_driver_register;
 742
 743         info(DRIVER_DESC ": " DRIVER_VERSION);
 744
 745         return 0;
 746
 747 failed_driver_register:
 748         usb_serial_deregister(&sierra_device);
 749 failed_device_register:
 750         return retval;
 751 }
 752
 753 static void __exit sierra_exit(void)
 754 {
 755         usb_deregister(&sierra_driver);
 756         usb_serial_deregister(&sierra_device);
 757 }
 758
 759 module_init(sierra_init);
 760 module_exit(sierra_exit);
 761
 762 MODULE_AUTHOR(DRIVER_AUTHOR);
 763 MODULE_DESCRIPTION(DRIVER_DESC);
 764 MODULE_VERSION(DRIVER_VERSION);
 765 MODULE_LICENSE("GPL");
 766
 767 module_param(nmea, bool, S_IRUGO | S_IWUSR);
 768 MODULE_PARM_DESC(nmea, "NMEA streaming");
 769
 770 module_param(debug, bool, S_IRUGO | S_IWUSR);
 771 MODULE_PARM_DESC(debug, "Debug messages");