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