drivers/usb/serial/sierra.c

   1 /*
   2   USB Driver for Sierra Wireless
   3
   4   Copyright (C) 2006, 2007, 2008  Kevin Lloyd <klloyd@sierrawireless.com>
   5
   6   IMPORTANT DISCLAIMER: This driver is not commercially supported by
   7   Sierra Wireless. Use at your own risk.
   8
   9   This driver is free software; you can redistribute it and/or modify
  10   it under the terms of Version 2 of the GNU General Public License as
  11   published by the Free Software Foundation.
  12
  13   Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
  14   Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
  15 */
  16
  17 #define DRIVER_VERSION "v.1.3.3"
  18 #define DRIVER_AUTHOR "Kevin Lloyd <klloyd@sierrawireless.com>"
  19 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
  20
  21 #include <linux/kernel.h>
  22 #include <linux/jiffies.h>
  23 #include <linux/errno.h>
  24 #include <linux/tty.h>
  25 #include <linux/tty_flip.h>
  26 #include <linux/module.h>
  27 #include <linux/usb.h>
  28 #include <linux/usb/serial.h>
  29 #include <linux/usb/ch9.h>
  30
  31 #define SWIMS_USB_REQUEST_SetPower      0x00
  32 #define SWIMS_USB_REQUEST_SetNmea       0x07
  33
  34 /* per port private data */
  35 #define N_IN_URB        4
  36 #define N_OUT_URB       4
  37 #define IN_BUFLEN       4096
  38
  39 static int debug;
  40 static int nmea;
  41
  42 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
  43 {
  44         int result;
  45         dev_dbg(&udev->dev, "%s", __func__);
  46         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  47                         SWIMS_USB_REQUEST_SetPower,     /* __u8 request      */
  48                         USB_TYPE_VENDOR,                /* __u8 request type */
  49                         swiState,                       /* __u16 value       */
  50                         0,                              /* __u16 index       */
  51                         NULL,                           /* void *data        */
  52                         0,                              /* __u16 size        */
  53                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  54         return result;
  55 }
  56
  57 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
  58 {
  59         int result;
  60         dev_dbg(&udev->dev, "%s", __func__);
  61         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  62                         SWIMS_USB_REQUEST_SetNmea,      /* __u8 request      */
  63                         USB_TYPE_VENDOR,                /* __u8 request type */
  64                         enable,                         /* __u16 value       */
  65                         0x0000,                         /* __u16 index       */
  66                         NULL,                           /* void *data        */
  67                         0,                              /* __u16 size        */
  68                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  69         return result;
  70 }
  71
  72 static int sierra_calc_num_ports(struct usb_serial *serial)
  73 {
  74         int result;
  75         int *num_ports = usb_get_serial_data(serial);
  76         dev_dbg(&serial->dev->dev, "%s", __func__);
  77
  78         result = *num_ports;
  79
  80         if (result) {
  81                 kfree(num_ports);
  82                 usb_set_serial_data(serial, NULL);
  83         }
  84
  85         return result;
  86 }
  87
  88 static int sierra_calc_interface(struct usb_serial *serial)
  89 {
  90         int interface;
  91         struct usb_interface *p_interface;
  92         struct usb_host_interface *p_host_interface;
  93         dev_dbg(&serial->dev->dev, "%s", __func__);
  94
  95         /* Get the interface structure pointer from the serial struct */
  96         p_interface = serial->interface;
  97
  98         /* Get a pointer to the host interface structure */
  99         p_host_interface = p_interface->cur_altsetting;
 100
 101         /* read the interface descriptor for this active altsetting
 102          * to find out the interface number we are on
 103         */
 104         interface = p_host_interface->desc.bInterfaceNumber;
 105
 106         return interface;
 107 }
 108
 109 static int sierra_probe(struct usb_serial *serial,
 110                         const struct usb_device_id *id)
 111 {
 112         int result = 0;
 113         struct usb_device *udev;
 114         int *num_ports;
 115         u8 ifnum;
 116         u8 numendpoints;
 117
 118         dev_dbg(&serial->dev->dev, "%s", __func__);
 119
 120         num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
 121         if (!num_ports)
 122                 return -ENOMEM;
 123
 124         ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
 125         numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
 126         udev = serial->dev;
 127
 128         /* Figure out the interface number from the serial structure */
 129         ifnum = sierra_calc_interface(serial);
 130
 131         /*
 132          * If this interface supports more than 1 alternate
 133          * select the 2nd one
 134          */
 135         if (serial->interface->num_altsetting == 2) {
 136                 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
 137                         ifnum);
 138                 /* We know the alternate setting is 1 for the MC8785 */
 139                 usb_set_interface(udev, ifnum, 1);
 140         }
 141
 142         /* Dummy interface present on some SKUs should be ignored */
 143         if (ifnum == 0x99)
 144                 *num_ports = 0;
 145         else if (numendpoints <= 3)
 146                 *num_ports = 1;
 147         else
 148                 *num_ports = (numendpoints-1)/2;
 149
 150         /*
 151          * save off our num_ports info so that we can use it in the
 152          * calc_num_ports callback
 153          */
 154         usb_set_serial_data(serial, (void *)num_ports);
 155
 156         return result;
 157 }
 158
 159 static struct usb_device_id id_table [] = {
 160         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
 161         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 162         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 163         { USB_DEVICE(0x03f0, 0x1b1d) }, /* HP ev2200 a.k.a MC5720 */
 164         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 165         { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
 166         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 167         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 168         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 169         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
 170          /* Sierra Wireless C597 */
 171         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
 172          /* Sierra Wireless Device */
 173         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
 174         { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless Device */
 175         { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless Device */
 176         { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless Device */
 177
 178         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 179         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 180         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 181         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 182         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Lenovo) */
 183         { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
 184         { USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
 185         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 186         { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
 187         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
 188         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
 189         { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
 190         { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
 191         { USB_DEVICE(0x1199, 0x683C) }, /* Sierra Wireless MC8790 */
 192         { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8790 */
 193         { USB_DEVICE(0x1199, 0x683E) }, /* Sierra Wireless MC8790 */
 194         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 195         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 196         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
 197         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
 198         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 199         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
 200         { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
 201         { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
 202         /* Sierra Wireless C885 */
 203         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
 204         /* Sierra Wireless Device */
 205         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
 206         /* Sierra Wireless Device */
 207         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
 208         /* Sierra Wireless Device */
 209         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
 210
 211         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
 212         { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
 213
 214         { }
 215 };
 216 MODULE_DEVICE_TABLE(usb, id_table);
 217
 218 static struct usb_driver sierra_driver = {
 219         .name       = "sierra",
 220         .probe      = usb_serial_probe,
 221         .disconnect = usb_serial_disconnect,
 222         .id_table   = id_table,
 223         .no_dynamic_id =        1,
 224 };
 225
 226 struct sierra_port_private {
 227         spinlock_t lock;        /* lock the structure */
 228         int outstanding_urbs;   /* number of out urbs in flight */
 229
 230         /* Input endpoints and buffers for this port */
 231         struct urb *in_urbs[N_IN_URB];
 232         char *in_buffer[N_IN_URB];
 233
 234         /* Settings for the port */
 235         int rts_state;  /* Handshaking pins (outputs) */
 236         int dtr_state;
 237         int cts_state;  /* Handshaking pins (inputs) */
 238         int dsr_state;
 239         int dcd_state;
 240         int ri_state;
 241 };
 242
 243 static int sierra_send_setup(struct usb_serial_port *port)
 244 {
 245         struct usb_serial *serial = port->serial;
 246         struct sierra_port_private *portdata;
 247         __u16 interface = 0;
 248         int val = 0;
 249
 250         dev_dbg(&port->dev, "%s", __func__);
 251
 252         portdata = usb_get_serial_port_data(port);
 253
 254         if (portdata->dtr_state)
 255                 val |= 0x01;
 256         if (portdata->rts_state)
 257                 val |= 0x02;
 258
 259         /* If composite device then properly report interface */
 260         if (serial->num_ports == 1) {
 261                 interface = sierra_calc_interface(serial);
 262                 /* Control message is sent only to interfaces with
 263                  * interrupt_in endpoints
 264                  */
 265                 if (port->interrupt_in_urb) {
 266                         /* send control message */
 267                         return usb_control_msg(serial->dev,
 268                                 usb_rcvctrlpipe(serial->dev, 0),
 269                                 0x22, 0x21, val, interface,
 270                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
 271                 }
 272         }
 273
 274         /* Otherwise the need to do non-composite mapping */
 275         else {
 276                 if (port->bulk_out_endpointAddress == 2)
 277                         interface = 0;
 278                 else if (port->bulk_out_endpointAddress == 4)
 279                         interface = 1;
 280                 else if (port->bulk_out_endpointAddress == 5)
 281                         interface = 2;
 282                 return usb_control_msg(serial->dev,
 283                         usb_rcvctrlpipe(serial->dev, 0),
 284                         0x22, 0x21, val, interface,
 285                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 286         }
 287         return 0;
 288 }
 289
 290 static void sierra_set_termios(struct tty_struct *tty,
 291                 struct usb_serial_port *port, struct ktermios *old_termios)
 292 {
 293         dev_dbg(&port->dev, "%s", __func__);
 294         tty_termios_copy_hw(tty->termios, old_termios);
 295         sierra_send_setup(port);
 296 }
 297
 298 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 299 {
 300         struct usb_serial_port *port = tty->driver_data;
 301         unsigned int value;
 302         struct sierra_port_private *portdata;
 303
 304         dev_dbg(&port->dev, "%s", __func__);
 305         portdata = usb_get_serial_port_data(port);
 306
 307         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 308                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 309                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 310                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 311                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 312                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 313
 314         return value;
 315 }
 316
 317 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
 318                         unsigned int set, unsigned int clear)
 319 {
 320         struct usb_serial_port *port = tty->driver_data;
 321         struct sierra_port_private *portdata;
 322
 323         portdata = usb_get_serial_port_data(port);
 324
 325         if (set & TIOCM_RTS)
 326                 portdata->rts_state = 1;
 327         if (set & TIOCM_DTR)
 328                 portdata->dtr_state = 1;
 329
 330         if (clear & TIOCM_RTS)
 331                 portdata->rts_state = 0;
 332         if (clear & TIOCM_DTR)
 333                 portdata->dtr_state = 0;
 334         return sierra_send_setup(port);
 335 }
 336
 337 static void sierra_outdat_callback(struct urb *urb)
 338 {
 339         struct usb_serial_port *port = urb->context;
 340         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 341         int status = urb->status;
 342         unsigned long flags;
 343
 344         dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
 345
 346         /* free up the transfer buffer, as usb_free_urb() does not do this */
 347         kfree(urb->transfer_buffer);
 348
 349         if (status)
 350                 dev_dbg(&port->dev, "%s - nonzero write bulk status "
 351                     "received: %d", __func__, status);
 352
 353         spin_lock_irqsave(&portdata->lock, flags);
 354         --portdata->outstanding_urbs;
 355         spin_unlock_irqrestore(&portdata->lock, flags);
 356
 357         usb_serial_port_softint(port);
 358 }
 359
 360 /* Write */
 361 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 362                                         const unsigned char *buf, int count)
 363 {
 364         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 365         struct usb_serial *serial = port->serial;
 366         unsigned long flags;
 367         unsigned char *buffer;
 368         struct urb *urb;
 369         int status;
 370
 371         portdata = usb_get_serial_port_data(port);
 372
 373         dev_dbg(&port->dev, "%s: write (%d chars)", __func__, count);
 374
 375         spin_lock_irqsave(&portdata->lock, flags);
 376         if (portdata->outstanding_urbs > N_OUT_URB) {
 377                 spin_unlock_irqrestore(&portdata->lock, flags);
 378                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 379                 return 0;
 380         }
 381         portdata->outstanding_urbs++;
 382         spin_unlock_irqrestore(&portdata->lock, flags);
 383
 384         buffer = kmalloc(count, GFP_ATOMIC);
 385         if (!buffer) {
 386                 dev_err(&port->dev, "out of memory\n");
 387                 count = -ENOMEM;
 388                 goto error_no_buffer;
 389         }
 390
 391         urb = usb_alloc_urb(0, GFP_ATOMIC);
 392         if (!urb) {
 393                 dev_err(&port->dev, "no more free urbs\n");
 394                 count = -ENOMEM;
 395                 goto error_no_urb;
 396         }
 397
 398         memcpy(buffer, buf, count);
 399
 400         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 401
 402         usb_fill_bulk_urb(urb, serial->dev,
 403                           usb_sndbulkpipe(serial->dev,
 404                                           port->bulk_out_endpointAddress),
 405                           buffer, count, sierra_outdat_callback, port);
 406
 407         /* send it down the pipe */
 408         status = usb_submit_urb(urb, GFP_ATOMIC);
 409         if (status) {
 410                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 411                         "with status = %d\n", __func__, status);
 412                 count = status;
 413                 goto error;
 414         }
 415
 416         /* we are done with this urb, so let the host driver
 417          * really free it when it is finished with it */
 418         usb_free_urb(urb);
 419
 420         return count;
 421 error:
 422         usb_free_urb(urb);
 423 error_no_urb:
 424         kfree(buffer);
 425 error_no_buffer:
 426         spin_lock_irqsave(&portdata->lock, flags);
 427         --portdata->outstanding_urbs;
 428         spin_unlock_irqrestore(&portdata->lock, flags);
 429         return count;
 430 }
 431
 432 static void sierra_indat_callback(struct urb *urb)
 433 {
 434         int err;
 435         int endpoint;
 436         struct usb_serial_port *port;
 437         struct tty_struct *tty;
 438         unsigned char *data = urb->transfer_buffer;
 439         int status = urb->status;
 440
 441         dbg("%s: %p", __func__, urb);
 442
 443         endpoint = usb_pipeendpoint(urb->pipe);
 444         port =  urb->context;
 445
 446         if (status) {
 447                 dev_dbg(&port->dev, "%s: nonzero status: %d on"
 448                     " endpoint %02x.", __func__, status, endpoint);
 449         } else {
 450                 if (urb->actual_length) {
 451                         tty = tty_port_tty_get(&port->port);
 452                         tty_buffer_request_room(tty, urb->actual_length);
 453                         tty_insert_flip_string(tty, data, urb->actual_length);
 454                         tty_flip_buffer_push(tty);
 455                         tty_kref_put(tty);
 456                 } else
 457                         dev_dbg(&port->dev, "%s: empty read urb"
 458                                 " received", __func__);
 459
 460                 /* Resubmit urb so we continue receiving */
 461                 if (port->port.count && status != -ESHUTDOWN) {
 462                         err = usb_submit_urb(urb, GFP_ATOMIC);
 463                         if (err)
 464                                 dev_err(&port->dev, "resubmit read urb failed."
 465                                         "(%d)\n", err);
 466                 }
 467         }
 468         return;
 469 }
 470
 471 static void sierra_instat_callback(struct urb *urb)
 472 {
 473         int err;
 474         int status = urb->status;
 475         struct usb_serial_port *port =  urb->context;
 476         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 477         struct usb_serial *serial = port->serial;
 478
 479         dev_dbg(&port->dev, "%s", __func__);
 480         dev_dbg(&port->dev, "%s: urb %p port %p has data %p", __func__,
 481                 urb, port, portdata);
 482
 483         if (status == 0) {
 484                 struct usb_ctrlrequest *req_pkt =
 485                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 486
 487                 if (!req_pkt) {
 488                         dev_dbg(&port->dev, "%s: NULL req_pkt\n",
 489                                 __func__);
 490                         return;
 491                 }
 492                 if ((req_pkt->bRequestType == 0xA1) &&
 493                                 (req_pkt->bRequest == 0x20)) {
 494                         int old_dcd_state;
 495                         unsigned char signals = *((unsigned char *)
 496                                         urb->transfer_buffer +
 497                                         sizeof(struct usb_ctrlrequest));
 498                         struct tty_struct *tty;
 499
 500                         dev_dbg(&port->dev, "%s: signal x%x", __func__,
 501                                 signals);
 502
 503                         old_dcd_state = portdata->dcd_state;
 504                         portdata->cts_state = 1;
 505                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 506                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 507                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 508
 509                         tty = tty_port_tty_get(&port->port);
 510                         if (tty && !C_CLOCAL(tty) &&
 511                                         old_dcd_state && !portdata->dcd_state)
 512                                 tty_hangup(tty);
 513                         tty_kref_put(tty);
 514                 } else {
 515                         dev_dbg(&port->dev, "%s: type %x req %x",
 516                                 __func__, req_pkt->bRequestType,
 517                                 req_pkt->bRequest);
 518                 }
 519         } else
 520                 dev_dbg(&port->dev, "%s: error %d", __func__, status);
 521
 522         /* Resubmit urb so we continue receiving IRQ data */
 523         if (status != -ESHUTDOWN) {
 524                 urb->dev = serial->dev;
 525                 err = usb_submit_urb(urb, GFP_ATOMIC);
 526                 if (err)
 527                         dev_dbg(&port->dev, "%s: resubmit intr urb "
 528                                 "failed. (%d)", __func__, err);
 529         }
 530 }
 531
 532 static int sierra_write_room(struct tty_struct *tty)
 533 {
 534         struct usb_serial_port *port = tty->driver_data;
 535         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 536         unsigned long flags;
 537
 538         dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
 539
 540         /* try to give a good number back based on if we have any free urbs at
 541          * this point in time */
 542         spin_lock_irqsave(&portdata->lock, flags);
 543         if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
 544                 spin_unlock_irqrestore(&portdata->lock, flags);
 545                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 546                 return 0;
 547         }
 548         spin_unlock_irqrestore(&portdata->lock, flags);
 549
 550         return 2048;
 551 }
 552
 553 static int sierra_open(struct tty_struct *tty,
 554                         struct usb_serial_port *port, struct file *filp)
 555 {
 556         struct sierra_port_private *portdata;
 557         struct usb_serial *serial = port->serial;
 558         int i;
 559         struct urb *urb;
 560         int result;
 561
 562         portdata = usb_get_serial_port_data(port);
 563
 564         dev_dbg(&port->dev, "%s", __func__);
 565
 566         /* Set some sane defaults */
 567         portdata->rts_state = 1;
 568         portdata->dtr_state = 1;
 569
 570         /* Reset low level data toggle and start reading from endpoints */
 571         for (i = 0; i < N_IN_URB; i++) {
 572                 urb = portdata->in_urbs[i];
 573                 if (!urb)
 574                         continue;
 575                 if (urb->dev != serial->dev) {
 576                         dev_dbg(&port->dev, "%s: dev %p != %p",
 577                                  __func__, urb->dev, serial->dev);
 578                         continue;
 579                 }
 580
 581                 /*
 582                  * make sure endpoint data toggle is synchronized with the
 583                  * device
 584                  */
 585                 usb_clear_halt(urb->dev, urb->pipe);
 586
 587                 result = usb_submit_urb(urb, GFP_KERNEL);
 588                 if (result) {
 589                         dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
 590                                 i, result, urb->transfer_buffer_length);
 591                 }
 592         }
 593
 594         sierra_send_setup(port);
 595
 596         /* start up the interrupt endpoint if we have one */
 597         if (port->interrupt_in_urb) {
 598                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 599                 if (result)
 600                         dev_err(&port->dev, "submit irq_in urb failed %d\n",
 601                                 result);
 602         }
 603         return 0;
 604 }
 605
 606 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
 607 {
 608         struct usb_serial *serial = port->serial;
 609         struct sierra_port_private *portdata;
 610
 611         portdata = usb_get_serial_port_data(port);
 612         portdata->rts_state = on;
 613         portdata->dtr_state = on;
 614
 615         if (serial->dev) {
 616                 mutex_lock(&serial->disc_mutex);
 617                 if (!serial->disconnected)
 618                         sierra_send_setup(port);
 619                 mutex_unlock(&serial->disc_mutex);
 620         }
 621 }
 622
 623 static void sierra_close(struct usb_serial_port *port)
 624 {
 625         int i;
 626         struct usb_serial *serial = port->serial;
 627         struct sierra_port_private *portdata;
 628
 629         dev_dbg(&port->dev, "%s", __func__);
 630         portdata = usb_get_serial_port_data(port);
 631
 632         if (serial->dev) {
 633                 /* Stop reading/writing urbs */
 634                 for (i = 0; i < N_IN_URB; i++)
 635                         usb_kill_urb(portdata->in_urbs[i]);
 636         }
 637         usb_kill_urb(port->interrupt_in_urb);
 638 }
 639
 640 static int sierra_startup(struct usb_serial *serial)
 641 {
 642         struct usb_serial_port *port;
 643         struct sierra_port_private *portdata;
 644         struct urb *urb;
 645         int i;
 646         int j;
 647
 648         dev_dbg(&serial->dev->dev, "%s", __func__);
 649
 650         /* Set Device mode to D0 */
 651         sierra_set_power_state(serial->dev, 0x0000);
 652
 653         /* Check NMEA and set */
 654         if (nmea)
 655                 sierra_vsc_set_nmea(serial->dev, 1);
 656
 657         /* Now setup per port private data */
 658         for (i = 0; i < serial->num_ports; i++) {
 659                 port = serial->port[i];
 660                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 661                 if (!portdata) {
 662                         dev_dbg(&port->dev, "%s: kmalloc for "
 663                                 "sierra_port_private (%d) failed!.",
 664                                 __func__, i);
 665                         return -ENOMEM;
 666                 }
 667                 spin_lock_init(&portdata->lock);
 668                 for (j = 0; j < N_IN_URB; j++) {
 669                         portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
 670                         if (!portdata->in_buffer[j]) {
 671                                 for (--j; j >= 0; j--)
 672                                         kfree(portdata->in_buffer[j]);
 673                                 kfree(portdata);
 674                                 return -ENOMEM;
 675                         }
 676                 }
 677
 678                 usb_set_serial_port_data(port, portdata);
 679
 680                 /* initialize the in urbs */
 681                 for (j = 0; j < N_IN_URB; ++j) {
 682                         urb = usb_alloc_urb(0, GFP_KERNEL);
 683                         if (urb == NULL) {
 684                                 dev_dbg(&port->dev, "%s: alloc for in "
 685                                         "port failed.", __func__);
 686                                 continue;
 687                         }
 688                         /* Fill URB using supplied data. */
 689                         usb_fill_bulk_urb(urb, serial->dev,
 690                                           usb_rcvbulkpipe(serial->dev,
 691                                                 port->bulk_in_endpointAddress),
 692                                           portdata->in_buffer[j], IN_BUFLEN,
 693                                           sierra_indat_callback, port);
 694                         portdata->in_urbs[j] = urb;
 695                 }
 696         }
 697
 698         return 0;
 699 }
 700
 701 static void sierra_shutdown(struct usb_serial *serial)
 702 {
 703         int i, j;
 704         struct usb_serial_port *port;
 705         struct sierra_port_private *portdata;
 706
 707         dev_dbg(&serial->dev->dev, "%s", __func__);
 708
 709         for (i = 0; i < serial->num_ports; ++i) {
 710                 port = serial->port[i];
 711                 if (!port)
 712                         continue;
 713                 portdata = usb_get_serial_port_data(port);
 714                 if (!portdata)
 715                         continue;
 716
 717                 for (j = 0; j < N_IN_URB; j++) {
 718                         usb_kill_urb(portdata->in_urbs[j]);
 719                         usb_free_urb(portdata->in_urbs[j]);
 720                         kfree(portdata->in_buffer[j]);
 721                 }
 722                 kfree(portdata);
 723                 usb_set_serial_port_data(port, NULL);
 724         }
 725 }
 726
 727 static struct usb_serial_driver sierra_device = {
 728         .driver = {
 729                 .owner =        THIS_MODULE,
 730                 .name =         "sierra",
 731         },
 732         .description       = "Sierra USB modem",
 733         .id_table          = id_table,
 734         .usb_driver        = &sierra_driver,
 735         .calc_num_ports    = sierra_calc_num_ports,
 736         .probe             = sierra_probe,
 737         .open              = sierra_open,
 738         .close             = sierra_close,
 739         .dtr_rts           = sierra_dtr_rts,
 740         .write             = sierra_write,
 741         .write_room        = sierra_write_room,
 742         .set_termios       = sierra_set_termios,
 743         .tiocmget          = sierra_tiocmget,
 744         .tiocmset          = sierra_tiocmset,
 745         .attach            = sierra_startup,
 746         .shutdown          = sierra_shutdown,
 747         .read_int_callback = sierra_instat_callback,
 748 };
 749
 750 /* Functions used by new usb-serial code. */
 751 static int __init sierra_init(void)
 752 {
 753         int retval;
 754         retval = usb_serial_register(&sierra_device);
 755         if (retval)
 756                 goto failed_device_register;
 757
 758
 759         retval = usb_register(&sierra_driver);
 760         if (retval)
 761                 goto failed_driver_register;
 762
 763         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 764                DRIVER_DESC "\n");
 765
 766         return 0;
 767
 768 failed_driver_register:
 769         usb_serial_deregister(&sierra_device);
 770 failed_device_register:
 771         return retval;
 772 }
 773
 774 static void __exit sierra_exit(void)
 775 {
 776         usb_deregister(&sierra_driver);
 777         usb_serial_deregister(&sierra_device);
 778 }
 779
 780 module_init(sierra_init);
 781 module_exit(sierra_exit);
 782
 783 MODULE_AUTHOR(DRIVER_AUTHOR);
 784 MODULE_DESCRIPTION(DRIVER_DESC);
 785 MODULE_VERSION(DRIVER_VERSION);
 786 MODULE_LICENSE("GPL");
 787
 788 module_param(nmea, bool, S_IRUGO | S_IWUSR);
 789 MODULE_PARM_DESC(nmea, "NMEA streaming");
 790
 791 module_param(debug, bool, S_IRUGO | S_IWUSR);
 792 MODULE_PARM_DESC(debug, "Debug messages");