drivers/usb/serial/sierra.c

   1 /*
   2   USB Driver for Sierra Wireless
   3
   4   Copyright (C) 2006, 2007, 2008  Kevin Lloyd <klloyd@sierrawireless.com>
   5
   6   IMPORTANT DISCLAIMER: This driver is not commercially supported by
   7   Sierra Wireless. Use at your own risk.
   8
   9   This driver is free software; you can redistribute it and/or modify
  10   it under the terms of Version 2 of the GNU General Public License as
  11   published by the Free Software Foundation.
  12
  13   Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
  14   Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
  15 */
  16
  17 #define DRIVER_VERSION "v.1.2.9c"
  18 #define DRIVER_AUTHOR "Kevin Lloyd <klloyd@sierrawireless.com>"
  19 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
  20
  21 #include <linux/kernel.h>
  22 #include <linux/jiffies.h>
  23 #include <linux/errno.h>
  24 #include <linux/tty.h>
  25 #include <linux/tty_flip.h>
  26 #include <linux/module.h>
  27 #include <linux/usb.h>
  28 #include <linux/usb/serial.h>
  29 #include <linux/usb/ch9.h>
  30
  31 #define SWIMS_USB_REQUEST_SetPower      0x00
  32 #define SWIMS_USB_REQUEST_SetNmea       0x07
  33 #define SWIMS_USB_REQUEST_SetMode       0x0B
  34 #define SWIMS_SET_MODE_Modem            0x0001
  35
  36 /* per port private data */
  37 #define N_IN_URB        4
  38 #define N_OUT_URB       4
  39 #define IN_BUFLEN       4096
  40
  41 static int debug;
  42 static int nmea;
  43 static int truinstall = 1;
  44
  45 enum devicetype {
  46         DEVICE_3_PORT =         0,
  47         DEVICE_1_PORT =         1,
  48         DEVICE_INSTALLER =      2,
  49 };
  50
  51 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
  52 {
  53         int result;
  54         dev_dbg(&udev->dev, "%s", __func__);
  55         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  56                         SWIMS_USB_REQUEST_SetPower,     /* __u8 request      */
  57                         USB_TYPE_VENDOR,                /* __u8 request type */
  58                         swiState,                       /* __u16 value       */
  59                         0,                              /* __u16 index       */
  60                         NULL,                           /* void *data        */
  61                         0,                              /* __u16 size        */
  62                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  63         return result;
  64 }
  65
  66 static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode)
  67 {
  68         int result;
  69         dev_dbg(&udev->dev,  "%s", __func__);
  70         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  71                         SWIMS_USB_REQUEST_SetMode,      /* __u8 request      */
  72                         USB_TYPE_VENDOR,                /* __u8 request type */
  73                         eSWocMode,                      /* __u16 value       */
  74                         0x0000,                         /* __u16 index       */
  75                         NULL,                           /* void *data        */
  76                         0,                              /* __u16 size        */
  77                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  78         return result;
  79 }
  80
  81 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
  82 {
  83         int result;
  84         dev_dbg(&udev->dev, "%s", __func__);
  85         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  86                         SWIMS_USB_REQUEST_SetNmea,      /* __u8 request      */
  87                         USB_TYPE_VENDOR,                /* __u8 request type */
  88                         enable,                         /* __u16 value       */
  89                         0x0000,                         /* __u16 index       */
  90                         NULL,                           /* void *data        */
  91                         0,                              /* __u16 size        */
  92                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  93         return result;
  94 }
  95
  96 static int sierra_calc_num_ports(struct usb_serial *serial)
  97 {
  98         int result;
  99         int *num_ports = usb_get_serial_data(serial);
 100         dev_dbg(&serial->dev->dev, "%s", __func__);
 101
 102         result = *num_ports;
 103
 104         if (result) {
 105                 kfree(num_ports);
 106                 usb_set_serial_data(serial, NULL);
 107         }
 108
 109         return result;
 110 }
 111
 112 static int sierra_calc_interface(struct usb_serial *serial)
 113 {
 114         int interface;
 115         struct usb_interface *p_interface;
 116         struct usb_host_interface *p_host_interface;
 117         dev_dbg(&serial->dev->dev, "%s", __func__);
 118
 119         /* Get the interface structure pointer from the serial struct */
 120         p_interface = serial->interface;
 121
 122         /* Get a pointer to the host interface structure */
 123         p_host_interface = p_interface->cur_altsetting;
 124
 125         /* read the interface descriptor for this active altsetting
 126          * to find out the interface number we are on
 127         */
 128         interface = p_host_interface->desc.bInterfaceNumber;
 129
 130         return interface;
 131 }
 132
 133 static int sierra_probe(struct usb_serial *serial,
 134                         const struct usb_device_id *id)
 135 {
 136         int result = 0;
 137         struct usb_device *udev;
 138         int *num_ports;
 139         u8 ifnum;
 140         u8 numendpoints;
 141
 142         dev_dbg(&serial->dev->dev, "%s", __func__);
 143
 144         num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
 145         if (!num_ports)
 146                 return -ENOMEM;
 147
 148         ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
 149         numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
 150         udev = serial->dev;
 151
 152         /* Figure out the interface number from the serial structure */
 153         ifnum = sierra_calc_interface(serial);
 154
 155         /*
 156          * If this interface supports more than 1 alternate
 157          * select the 2nd one
 158          */
 159         if (serial->interface->num_altsetting == 2) {
 160                 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
 161                         ifnum);
 162                 /* We know the alternate setting is 1 for the MC8785 */
 163                 usb_set_interface(udev, ifnum, 1);
 164         }
 165
 166         /* Check if in installer mode */
 167         if (truinstall && id->driver_info == DEVICE_INSTALLER) {
 168                 dev_dbg(&udev->dev, "%s", "FOUND TRU-INSTALL DEVICE(SW)\n");
 169                 result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
 170                 /* Don't bind to the device when in installer mode */
 171                 kfree(num_ports);
 172                 return -EIO;
 173         /* Dummy interface present on some SKUs should be ignored */
 174         } else if (ifnum == 0x99)
 175                 *num_ports = 0;
 176         else if (numendpoints <= 3)
 177                 *num_ports = 1;
 178         else
 179                 *num_ports = (numendpoints-1)/2;
 180
 181         /*
 182          * save off our num_ports info so that we can use it in the
 183          * calc_num_ports callback
 184          */
 185         usb_set_serial_data(serial, (void *)num_ports);
 186
 187         return result;
 188 }
 189
 190 static struct usb_device_id id_table [] = {
 191         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
 192         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 193         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 194         { USB_DEVICE(0x0f30, 0x1b1d) }, /* Sierra Wireless MC5720 */
 195         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 196         { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
 197         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 198         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 199         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 200         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
 201          /* Sierra Wireless C597 */
 202         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
 203          /* Sierra Wireless Device */
 204         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
 205         { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless Device */
 206
 207         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 208         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 209         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 210         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 211         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Lenovo) */
 212         { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
 213         { USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
 214         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 215         { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
 216         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
 217         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
 218         { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
 219         { USB_DEVICE(0x1199, 0x683C) }, /* Sierra Wireless MC8790 */
 220         { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8790 */
 221         { USB_DEVICE(0x1199, 0x683E) }, /* Sierra Wireless MC8790 */
 222         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 223         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 224         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
 225         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
 226         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 227         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
 228         { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
 229         { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
 230         /* Sierra Wireless C885 */
 231         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
 232         /* Sierra Wireless Device */
 233         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
 234         /* Sierra Wireless Device */
 235         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
 236
 237         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
 238         { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
 239
 240         { USB_DEVICE(0x1199, 0x0FFF), .driver_info = DEVICE_INSTALLER},
 241         { }
 242 };
 243 MODULE_DEVICE_TABLE(usb, id_table);
 244
 245 static struct usb_driver sierra_driver = {
 246         .name       = "sierra",
 247         .probe      = usb_serial_probe,
 248         .disconnect = usb_serial_disconnect,
 249         .id_table   = id_table,
 250         .no_dynamic_id =        1,
 251 };
 252
 253 struct sierra_port_private {
 254         spinlock_t lock;        /* lock the structure */
 255         int outstanding_urbs;   /* number of out urbs in flight */
 256
 257         /* Input endpoints and buffers for this port */
 258         struct urb *in_urbs[N_IN_URB];
 259         char *in_buffer[N_IN_URB];
 260
 261         /* Settings for the port */
 262         int rts_state;  /* Handshaking pins (outputs) */
 263         int dtr_state;
 264         int cts_state;  /* Handshaking pins (inputs) */
 265         int dsr_state;
 266         int dcd_state;
 267         int ri_state;
 268 };
 269
 270 static int sierra_send_setup(struct tty_struct *tty,
 271                                                 struct usb_serial_port *port)
 272 {
 273         struct usb_serial *serial = port->serial;
 274         struct sierra_port_private *portdata;
 275         __u16 interface = 0;
 276
 277         dbg("%s", __func__);
 278
 279         portdata = usb_get_serial_port_data(port);
 280
 281         if (tty) {
 282                 int val = 0;
 283                 if (portdata->dtr_state)
 284                         val |= 0x01;
 285                 if (portdata->rts_state)
 286                         val |= 0x02;
 287
 288                 /* If composite device then properly report interface */
 289                 if (serial->num_ports == 1)
 290                         interface = sierra_calc_interface(serial);
 291
 292                 /* Otherwise the need to do non-composite mapping */
 293                 else {
 294                         if (port->bulk_out_endpointAddress == 2)
 295                                 interface = 0;
 296                         else if (port->bulk_out_endpointAddress == 4)
 297                                 interface = 1;
 298                         else if (port->bulk_out_endpointAddress == 5)
 299                                 interface = 2;
 300                 }
 301
 302                 return usb_control_msg(serial->dev,
 303                                 usb_rcvctrlpipe(serial->dev, 0),
 304                                 0x22, 0x21, val, interface,
 305                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
 306         }
 307
 308         return 0;
 309 }
 310
 311 static void sierra_set_termios(struct tty_struct *tty,
 312                 struct usb_serial_port *port, struct ktermios *old_termios)
 313 {
 314         dbg("%s", __func__);
 315         tty_termios_copy_hw(tty->termios, old_termios);
 316         sierra_send_setup(tty, port);
 317 }
 318
 319 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 320 {
 321         struct usb_serial_port *port = tty->driver_data;
 322         unsigned int value;
 323         struct sierra_port_private *portdata;
 324
 325         portdata = usb_get_serial_port_data(port);
 326
 327         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 328                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 329                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 330                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 331                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 332                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 333
 334         return value;
 335 }
 336
 337 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
 338                         unsigned int set, unsigned int clear)
 339 {
 340         struct usb_serial_port *port = tty->driver_data;
 341         struct sierra_port_private *portdata;
 342
 343         portdata = usb_get_serial_port_data(port);
 344
 345         if (set & TIOCM_RTS)
 346                 portdata->rts_state = 1;
 347         if (set & TIOCM_DTR)
 348                 portdata->dtr_state = 1;
 349
 350         if (clear & TIOCM_RTS)
 351                 portdata->rts_state = 0;
 352         if (clear & TIOCM_DTR)
 353                 portdata->dtr_state = 0;
 354         return sierra_send_setup(tty, port);
 355 }
 356
 357 static void sierra_outdat_callback(struct urb *urb)
 358 {
 359         struct usb_serial_port *port = urb->context;
 360         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 361         int status = urb->status;
 362         unsigned long flags;
 363
 364         dbg("%s - port %d", __func__, port->number);
 365
 366         /* free up the transfer buffer, as usb_free_urb() does not do this */
 367         kfree(urb->transfer_buffer);
 368
 369         if (status)
 370                 dbg("%s - nonzero write bulk status received: %d",
 371                     __func__, status);
 372
 373         spin_lock_irqsave(&portdata->lock, flags);
 374         --portdata->outstanding_urbs;
 375         spin_unlock_irqrestore(&portdata->lock, flags);
 376
 377         usb_serial_port_softint(port);
 378 }
 379
 380 /* Write */
 381 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 382                                         const unsigned char *buf, int count)
 383 {
 384         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 385         struct usb_serial *serial = port->serial;
 386         unsigned long flags;
 387         unsigned char *buffer;
 388         struct urb *urb;
 389         int status;
 390
 391         portdata = usb_get_serial_port_data(port);
 392
 393         dbg("%s: write (%d chars)", __func__, count);
 394
 395         spin_lock_irqsave(&portdata->lock, flags);
 396         if (portdata->outstanding_urbs > N_OUT_URB) {
 397                 spin_unlock_irqrestore(&portdata->lock, flags);
 398                 dbg("%s - write limit hit\n", __func__);
 399                 return 0;
 400         }
 401         portdata->outstanding_urbs++;
 402         spin_unlock_irqrestore(&portdata->lock, flags);
 403
 404         buffer = kmalloc(count, GFP_ATOMIC);
 405         if (!buffer) {
 406                 dev_err(&port->dev, "out of memory\n");
 407                 count = -ENOMEM;
 408                 goto error_no_buffer;
 409         }
 410
 411         urb = usb_alloc_urb(0, GFP_ATOMIC);
 412         if (!urb) {
 413                 dev_err(&port->dev, "no more free urbs\n");
 414                 count = -ENOMEM;
 415                 goto error_no_urb;
 416         }
 417
 418         memcpy(buffer, buf, count);
 419
 420         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 421
 422         usb_fill_bulk_urb(urb, serial->dev,
 423                           usb_sndbulkpipe(serial->dev,
 424                                           port->bulk_out_endpointAddress),
 425                           buffer, count, sierra_outdat_callback, port);
 426
 427         /* send it down the pipe */
 428         status = usb_submit_urb(urb, GFP_ATOMIC);
 429         if (status) {
 430                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 431                         "with status = %d\n", __func__, status);
 432                 count = status;
 433                 goto error;
 434         }
 435
 436         /* we are done with this urb, so let the host driver
 437          * really free it when it is finished with it */
 438         usb_free_urb(urb);
 439
 440         return count;
 441 error:
 442         usb_free_urb(urb);
 443 error_no_urb:
 444         kfree(buffer);
 445 error_no_buffer:
 446         spin_lock_irqsave(&portdata->lock, flags);
 447         --portdata->outstanding_urbs;
 448         spin_unlock_irqrestore(&portdata->lock, flags);
 449         return count;
 450 }
 451
 452 static void sierra_indat_callback(struct urb *urb)
 453 {
 454         int err;
 455         int endpoint;
 456         struct usb_serial_port *port;
 457         struct tty_struct *tty;
 458         unsigned char *data = urb->transfer_buffer;
 459         int status = urb->status;
 460
 461         dbg("%s: %p", __func__, urb);
 462
 463         endpoint = usb_pipeendpoint(urb->pipe);
 464         port =  urb->context;
 465
 466         if (status) {
 467                 dbg("%s: nonzero status: %d on endpoint %02x.",
 468                     __func__, status, endpoint);
 469         } else {
 470                 tty = port->port.tty;
 471                 if (urb->actual_length) {
 472                         tty_buffer_request_room(tty, urb->actual_length);
 473                         tty_insert_flip_string(tty, data, urb->actual_length);
 474                         tty_flip_buffer_push(tty);
 475                 } else {
 476                         dbg("%s: empty read urb received", __func__);
 477                 }
 478
 479                 /* Resubmit urb so we continue receiving */
 480                 if (port->port.count && status != -ESHUTDOWN) {
 481                         err = usb_submit_urb(urb, GFP_ATOMIC);
 482                         if (err)
 483                                 dev_err(&port->dev, "resubmit read urb failed."
 484                                         "(%d)\n", err);
 485                 }
 486         }
 487         return;
 488 }
 489
 490 static void sierra_instat_callback(struct urb *urb)
 491 {
 492         int err;
 493         int status = urb->status;
 494         struct usb_serial_port *port =  urb->context;
 495         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 496         struct usb_serial *serial = port->serial;
 497
 498         dbg("%s", __func__);
 499         dbg("%s: urb %p port %p has data %p", __func__, urb, port, portdata);
 500
 501         if (status == 0) {
 502                 struct usb_ctrlrequest *req_pkt =
 503                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 504
 505                 if (!req_pkt) {
 506                         dbg("%s: NULL req_pkt\n", __func__);
 507                         return;
 508                 }
 509                 if ((req_pkt->bRequestType == 0xA1) &&
 510                                 (req_pkt->bRequest == 0x20)) {
 511                         int old_dcd_state;
 512                         unsigned char signals = *((unsigned char *)
 513                                         urb->transfer_buffer +
 514                                         sizeof(struct usb_ctrlrequest));
 515
 516                         dbg("%s: signal x%x", __func__, signals);
 517
 518                         old_dcd_state = portdata->dcd_state;
 519                         portdata->cts_state = 1;
 520                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 521                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 522                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 523
 524                         if (port->port.tty && !C_CLOCAL(port->port.tty) &&
 525                                         old_dcd_state && !portdata->dcd_state)
 526                                 tty_hangup(port->port.tty);
 527                 } else {
 528                         dbg("%s: type %x req %x", __func__,
 529                                 req_pkt->bRequestType, req_pkt->bRequest);
 530                 }
 531         } else
 532                 dbg("%s: error %d", __func__, status);
 533
 534         /* Resubmit urb so we continue receiving IRQ data */
 535         if (status != -ESHUTDOWN) {
 536                 urb->dev = serial->dev;
 537                 err = usb_submit_urb(urb, GFP_ATOMIC);
 538                 if (err)
 539                         dbg("%s: resubmit intr urb failed. (%d)",
 540                                 __func__, err);
 541         }
 542 }
 543
 544 static int sierra_write_room(struct tty_struct *tty)
 545 {
 546         struct usb_serial_port *port = tty->driver_data;
 547         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 548         unsigned long flags;
 549
 550         dbg("%s - port %d", __func__, port->number);
 551
 552         /* try to give a good number back based on if we have any free urbs at
 553          * this point in time */
 554         spin_lock_irqsave(&portdata->lock, flags);
 555         if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
 556                 spin_unlock_irqrestore(&portdata->lock, flags);
 557                 dbg("%s - write limit hit\n", __func__);
 558                 return 0;
 559         }
 560         spin_unlock_irqrestore(&portdata->lock, flags);
 561
 562         return 2048;
 563 }
 564
 565 static int sierra_open(struct tty_struct *tty,
 566                         struct usb_serial_port *port, struct file *filp)
 567 {
 568         struct sierra_port_private *portdata;
 569         struct usb_serial *serial = port->serial;
 570         int i;
 571         struct urb *urb;
 572         int result;
 573
 574         portdata = usb_get_serial_port_data(port);
 575
 576         dbg("%s", __func__);
 577
 578         /* Set some sane defaults */
 579         portdata->rts_state = 1;
 580         portdata->dtr_state = 1;
 581
 582         /* Reset low level data toggle and start reading from endpoints */
 583         for (i = 0; i < N_IN_URB; i++) {
 584                 urb = portdata->in_urbs[i];
 585                 if (!urb)
 586                         continue;
 587                 if (urb->dev != serial->dev) {
 588                         dbg("%s: dev %p != %p", __func__,
 589                                 urb->dev, serial->dev);
 590                         continue;
 591                 }
 592
 593                 /*
 594                  * make sure endpoint data toggle is synchronized with the
 595                  * device
 596                  */
 597                 usb_clear_halt(urb->dev, urb->pipe);
 598
 599                 result = usb_submit_urb(urb, GFP_KERNEL);
 600                 if (result) {
 601                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
 602                                 i, result, urb->transfer_buffer_length);
 603                 }
 604         }
 605
 606         if (tty)
 607                 tty->low_latency = 1;
 608
 609         sierra_send_setup(tty, port);
 610
 611         /* start up the interrupt endpoint if we have one */
 612         if (port->interrupt_in_urb) {
 613                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 614                 if (result)
 615                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
 616                                 result);
 617         }
 618         return 0;
 619 }
 620
 621 static void sierra_close(struct tty_struct *tty,
 622                         struct usb_serial_port *port, struct file *filp)
 623 {
 624         int i;
 625         struct usb_serial *serial = port->serial;
 626         struct sierra_port_private *portdata;
 627
 628         dbg("%s", __func__);
 629         portdata = usb_get_serial_port_data(port);
 630
 631         portdata->rts_state = 0;
 632         portdata->dtr_state = 0;
 633
 634         if (serial->dev) {
 635                 mutex_lock(&serial->disc_mutex);
 636                 if (!serial->disconnected)
 637                         sierra_send_setup(tty, port);
 638                 mutex_unlock(&serial->disc_mutex);
 639
 640                 /* Stop reading/writing urbs */
 641                 for (i = 0; i < N_IN_URB; i++)
 642                         usb_kill_urb(portdata->in_urbs[i]);
 643         }
 644
 645         usb_kill_urb(port->interrupt_in_urb);
 646
 647         port->port.tty = NULL;  /* FIXME */
 648 }
 649
 650 static int sierra_startup(struct usb_serial *serial)
 651 {
 652         struct usb_serial_port *port;
 653         struct sierra_port_private *portdata;
 654         struct urb *urb;
 655         int i;
 656         int j;
 657
 658         dbg("%s", __func__);
 659
 660         /* Set Device mode to D0 */
 661         sierra_set_power_state(serial->dev, 0x0000);
 662
 663         /* Check NMEA and set */
 664         if (nmea)
 665                 sierra_vsc_set_nmea(serial->dev, 1);
 666
 667         /* Now setup per port private data */
 668         for (i = 0; i < serial->num_ports; i++) {
 669                 port = serial->port[i];
 670                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 671                 if (!portdata) {
 672                         dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
 673                                         __func__, i);
 674                         return -ENOMEM;
 675                 }
 676                 spin_lock_init(&portdata->lock);
 677                 for (j = 0; j < N_IN_URB; j++) {
 678                         portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
 679                         if (!portdata->in_buffer[j]) {
 680                                 for (--j; j >= 0; j--)
 681                                         kfree(portdata->in_buffer[j]);
 682                                 kfree(portdata);
 683                                 return -ENOMEM;
 684                         }
 685                 }
 686
 687                 usb_set_serial_port_data(port, portdata);
 688
 689                 /* initialize the in urbs */
 690                 for (j = 0; j < N_IN_URB; ++j) {
 691                         urb = usb_alloc_urb(0, GFP_KERNEL);
 692                         if (urb == NULL) {
 693                                 dbg("%s: alloc for in port failed.",
 694                                     __func__);
 695                                 continue;
 696                         }
 697                         /* Fill URB using supplied data. */
 698                         usb_fill_bulk_urb(urb, serial->dev,
 699                                           usb_rcvbulkpipe(serial->dev,
 700                                                 port->bulk_in_endpointAddress),
 701                                           portdata->in_buffer[j], IN_BUFLEN,
 702                                           sierra_indat_callback, port);
 703                         portdata->in_urbs[j] = urb;
 704                 }
 705         }
 706
 707         return 0;
 708 }
 709
 710 static void sierra_shutdown(struct usb_serial *serial)
 711 {
 712         int i, j;
 713         struct usb_serial_port *port;
 714         struct sierra_port_private *portdata;
 715
 716         dbg("%s", __func__);
 717
 718         for (i = 0; i < serial->num_ports; ++i) {
 719                 port = serial->port[i];
 720                 if (!port)
 721                         continue;
 722                 portdata = usb_get_serial_port_data(port);
 723                 if (!portdata)
 724                         continue;
 725
 726                 for (j = 0; j < N_IN_URB; j++) {
 727                         usb_kill_urb(portdata->in_urbs[j]);
 728                         usb_free_urb(portdata->in_urbs[j]);
 729                         kfree(portdata->in_buffer[j]);
 730                 }
 731                 kfree(portdata);
 732                 usb_set_serial_port_data(port, NULL);
 733         }
 734 }
 735
 736 static struct usb_serial_driver sierra_device = {
 737         .driver = {
 738                 .owner =        THIS_MODULE,
 739                 .name =         "sierra",
 740         },
 741         .description       = "Sierra USB modem",
 742         .id_table          = id_table,
 743         .usb_driver        = &sierra_driver,
 744         .calc_num_ports    = sierra_calc_num_ports,
 745         .probe             = sierra_probe,
 746         .open              = sierra_open,
 747         .close             = sierra_close,
 748         .write             = sierra_write,
 749         .write_room        = sierra_write_room,
 750         .set_termios       = sierra_set_termios,
 751         .tiocmget          = sierra_tiocmget,
 752         .tiocmset          = sierra_tiocmset,
 753         .attach            = sierra_startup,
 754         .shutdown          = sierra_shutdown,
 755         .read_int_callback = sierra_instat_callback,
 756 };
 757
 758 /* Functions used by new usb-serial code. */
 759 static int __init sierra_init(void)
 760 {
 761         int retval;
 762         retval = usb_serial_register(&sierra_device);
 763         if (retval)
 764                 goto failed_device_register;
 765
 766
 767         retval = usb_register(&sierra_driver);
 768         if (retval)
 769                 goto failed_driver_register;
 770
 771         info(DRIVER_DESC ": " DRIVER_VERSION);
 772
 773         return 0;
 774
 775 failed_driver_register:
 776         usb_serial_deregister(&sierra_device);
 777 failed_device_register:
 778         return retval;
 779 }
 780
 781 static void __exit sierra_exit(void)
 782 {
 783         usb_deregister(&sierra_driver);
 784         usb_serial_deregister(&sierra_device);
 785 }
 786
 787 module_init(sierra_init);
 788 module_exit(sierra_exit);
 789
 790 MODULE_AUTHOR(DRIVER_AUTHOR);
 791 MODULE_DESCRIPTION(DRIVER_DESC);
 792 MODULE_VERSION(DRIVER_VERSION);
 793 MODULE_LICENSE("GPL");
 794
 795 module_param(nmea, bool, S_IRUGO | S_IWUSR);
 796 MODULE_PARM_DESC(nmea, "NMEA streaming");
 797
 798 #ifdef CONFIG_USB_DEBUG
 799 module_param(debug, bool, S_IRUGO | S_IWUSR);
 800 MODULE_PARM_DESC(debug, "Debug messages");
 801 #endif