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   Copyright (C) 2008, 2009  Elina Pasheva, Matthew Safar, Rory Filer
   7                         <linux@sierrawireless.com>
   8
   9   IMPORTANT DISCLAIMER: This driver is not commercially supported by
  10   Sierra Wireless. Use at your own risk.
  11
  12   This driver is free software; you can redistribute it and/or modify
  13   it under the terms of Version 2 of the GNU General Public License as
  14   published by the Free Software Foundation.
  15
  16   Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
  17   Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
  18 */
  19 /* Uncomment to log function calls */
  20 /* #define DEBUG */
  21 #define DRIVER_VERSION "v.1.7.16"
  22 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
  23 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
  24
  25 #include <linux/kernel.h>
  26 #include <linux/jiffies.h>
  27 #include <linux/errno.h>
  28 #include <linux/tty.h>
  29 #include <linux/slab.h>
  30 #include <linux/tty_flip.h>
  31 #include <linux/module.h>
  32 #include <linux/usb.h>
  33 #include <linux/usb/serial.h>
  34
  35 #define SWIMS_USB_REQUEST_SetPower      0x00
  36 #define SWIMS_USB_REQUEST_SetNmea       0x07
  37
  38 #define N_IN_URB_HM     8
  39 #define N_OUT_URB_HM    64
  40 #define N_IN_URB        4
  41 #define N_OUT_URB       4
  42 #define IN_BUFLEN       4096
  43
  44 #define MAX_TRANSFER            (PAGE_SIZE - 512)
  45 /* MAX_TRANSFER is chosen so that the VM is not stressed by
  46    allocations > PAGE_SIZE and the number of packets in a page
  47    is an integer 512 is the largest possible packet on EHCI */
  48
  49 static int debug;
  50 static int nmea;
  51
  52 /* Used in interface blacklisting */
  53 struct sierra_iface_info {
  54         const u32 infolen;      /* number of interface numbers on blacklist */
  55         const u8  *ifaceinfo;   /* pointer to the array holding the numbers */
  56 };
  57
  58 struct sierra_intf_private {
  59         spinlock_t susp_lock;
  60         unsigned int suspended:1;
  61         int in_flight;
  62 };
  63
  64 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
  65 {
  66         int result;
  67         dev_dbg(&udev->dev, "%s\n", __func__);
  68         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  69                         SWIMS_USB_REQUEST_SetPower,     /* __u8 request      */
  70                         USB_TYPE_VENDOR,                /* __u8 request type */
  71                         swiState,                       /* __u16 value       */
  72                         0,                              /* __u16 index       */
  73                         NULL,                           /* void *data        */
  74                         0,                              /* __u16 size        */
  75                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  76         return result;
  77 }
  78
  79 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
  80 {
  81         int result;
  82         dev_dbg(&udev->dev, "%s\n", __func__);
  83         result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
  84                         SWIMS_USB_REQUEST_SetNmea,      /* __u8 request      */
  85                         USB_TYPE_VENDOR,                /* __u8 request type */
  86                         enable,                         /* __u16 value       */
  87                         0x0000,                         /* __u16 index       */
  88                         NULL,                           /* void *data        */
  89                         0,                              /* __u16 size        */
  90                         USB_CTRL_SET_TIMEOUT);          /* int timeout       */
  91         return result;
  92 }
  93
  94 static int sierra_calc_num_ports(struct usb_serial *serial)
  95 {
  96         int num_ports = 0;
  97         u8 ifnum, numendpoints;
  98
  99         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 100
 101         ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
 102         numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
 103
 104         /* Dummy interface present on some SKUs should be ignored */
 105         if (ifnum == 0x99)
 106                 num_ports = 0;
 107         else if (numendpoints <= 3)
 108                 num_ports = 1;
 109         else
 110                 num_ports = (numendpoints-1)/2;
 111         return num_ports;
 112 }
 113
 114 static int is_blacklisted(const u8 ifnum,
 115                                 const struct sierra_iface_info *blacklist)
 116 {
 117         const u8  *info;
 118         int i;
 119
 120         if (blacklist) {
 121                 info = blacklist->ifaceinfo;
 122
 123                 for (i = 0; i < blacklist->infolen; i++) {
 124                         if (info[i] == ifnum)
 125                                 return 1;
 126                 }
 127         }
 128         return 0;
 129 }
 130
 131 static int is_himemory(const u8 ifnum,
 132                                 const struct sierra_iface_info *himemorylist)
 133 {
 134         const u8  *info;
 135         int i;
 136
 137         if (himemorylist) {
 138                 info = himemorylist->ifaceinfo;
 139
 140                 for (i=0; i < himemorylist->infolen; i++) {
 141                         if (info[i] == ifnum)
 142                                 return 1;
 143                 }
 144         }
 145         return 0;
 146 }
 147
 148 static int sierra_calc_interface(struct usb_serial *serial)
 149 {
 150         int interface;
 151         struct usb_interface *p_interface;
 152         struct usb_host_interface *p_host_interface;
 153         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 154
 155         /* Get the interface structure pointer from the serial struct */
 156         p_interface = serial->interface;
 157
 158         /* Get a pointer to the host interface structure */
 159         p_host_interface = p_interface->cur_altsetting;
 160
 161         /* read the interface descriptor for this active altsetting
 162          * to find out the interface number we are on
 163         */
 164         interface = p_host_interface->desc.bInterfaceNumber;
 165
 166         return interface;
 167 }
 168
 169 static int sierra_probe(struct usb_serial *serial,
 170                         const struct usb_device_id *id)
 171 {
 172         int result = 0;
 173         struct usb_device *udev;
 174         struct sierra_intf_private *data;
 175         u8 ifnum;
 176
 177         udev = serial->dev;
 178         dev_dbg(&udev->dev, "%s\n", __func__);
 179
 180         ifnum = sierra_calc_interface(serial);
 181         /*
 182          * If this interface supports more than 1 alternate
 183          * select the 2nd one
 184          */
 185         if (serial->interface->num_altsetting == 2) {
 186                 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
 187                         ifnum);
 188                 /* We know the alternate setting is 1 for the MC8785 */
 189                 usb_set_interface(udev, ifnum, 1);
 190         }
 191
 192         /* ifnum could have changed - by calling usb_set_interface */
 193         ifnum = sierra_calc_interface(serial);
 194
 195         if (is_blacklisted(ifnum,
 196                                 (struct sierra_iface_info *)id->driver_info)) {
 197                 dev_dbg(&serial->dev->dev,
 198                         "Ignoring blacklisted interface #%d\n", ifnum);
 199                 return -ENODEV;
 200         }
 201
 202         data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
 203         if (!data)
 204                 return -ENOMEM;
 205         spin_lock_init(&data->susp_lock);
 206
 207         return result;
 208 }
 209
 210 /* interfaces with higher memory requirements */
 211 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
 212 static const struct sierra_iface_info typeA_interface_list = {
 213         .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
 214         .ifaceinfo = hi_memory_typeA_ifaces,
 215 };
 216
 217 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
 218 static const struct sierra_iface_info typeB_interface_list = {
 219         .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
 220         .ifaceinfo = hi_memory_typeB_ifaces,
 221 };
 222
 223 /* 'blacklist' of interfaces not served by this driver */
 224 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
 225 static const struct sierra_iface_info direct_ip_interface_blacklist = {
 226         .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
 227         .ifaceinfo = direct_ip_non_serial_ifaces,
 228 };
 229
 230 static const struct usb_device_id id_table[] = {
 231         { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
 232         { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
 233         { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
 234         { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
 235
 236         { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
 237         { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
 238         { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
 239         { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
 240         { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
 241         { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
 242         { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
 243         { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
 244         { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
 245         { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
 246         { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
 247         { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
 248         { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */
 249         /* Sierra Wireless C597 */
 250         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
 251         /* Sierra Wireless T598 */
 252         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
 253         { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
 254         { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
 255         { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
 256         { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
 257
 258         { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
 259         { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
 260         { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
 261         { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
 262         { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
 263         { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
 264         { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
 265         { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
 266         { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
 267         { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
 268         { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
 269         { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
 270         { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
 271         { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
 272         { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
 273         { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
 274         { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
 275         { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
 276         { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
 277         { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
 278         { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
 279         /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
 280         { USB_DEVICE(0x1199, 0x683C) },
 281         { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
 282         /* Sierra Wireless MC8790, MC8791, MC8792 */
 283         { USB_DEVICE(0x1199, 0x683E) },
 284         { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
 285         { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
 286         { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
 287         { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
 288         { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
 289         { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
 290         { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
 291         { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
 292         /* Sierra Wireless C885 */
 293         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
 294         /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
 295         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
 296         /* Sierra Wireless C22/C33 */
 297         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
 298         /* Sierra Wireless HSPA Non-Composite Device */
 299         { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
 300         { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
 301         { USB_DEVICE(0x1199, 0x68A3),   /* Sierra Wireless Direct IP modems */
 302           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 303         },
 304        { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
 305
 306         { }
 307 };
 308 MODULE_DEVICE_TABLE(usb, id_table);
 309
 310
 311 struct sierra_port_private {
 312         spinlock_t lock;        /* lock the structure */
 313         int outstanding_urbs;   /* number of out urbs in flight */
 314         struct usb_anchor active;
 315         struct usb_anchor delayed;
 316
 317         int num_out_urbs;
 318         int num_in_urbs;
 319         /* Input endpoints and buffers for this port */
 320         struct urb *in_urbs[N_IN_URB_HM];
 321
 322         /* Settings for the port */
 323         int rts_state;  /* Handshaking pins (outputs) */
 324         int dtr_state;
 325         int cts_state;  /* Handshaking pins (inputs) */
 326         int dsr_state;
 327         int dcd_state;
 328         int ri_state;
 329         unsigned int opened:1;
 330 };
 331
 332 static int sierra_send_setup(struct usb_serial_port *port)
 333 {
 334         struct usb_serial *serial = port->serial;
 335         struct sierra_port_private *portdata;
 336         __u16 interface = 0;
 337         int val = 0;
 338         int do_send = 0;
 339         int retval;
 340
 341         dev_dbg(&port->dev, "%s\n", __func__);
 342
 343         portdata = usb_get_serial_port_data(port);
 344
 345         if (portdata->dtr_state)
 346                 val |= 0x01;
 347         if (portdata->rts_state)
 348                 val |= 0x02;
 349
 350         /* If composite device then properly report interface */
 351         if (serial->num_ports == 1) {
 352                 interface = sierra_calc_interface(serial);
 353                 /* Control message is sent only to interfaces with
 354                  * interrupt_in endpoints
 355                  */
 356                 if (port->interrupt_in_urb) {
 357                         /* send control message */
 358                         do_send = 1;
 359                 }
 360         }
 361
 362         /* Otherwise the need to do non-composite mapping */
 363         else {
 364                 if (port->bulk_out_endpointAddress == 2)
 365                         interface = 0;
 366                 else if (port->bulk_out_endpointAddress == 4)
 367                         interface = 1;
 368                 else if (port->bulk_out_endpointAddress == 5)
 369                         interface = 2;
 370
 371                 do_send = 1;
 372         }
 373         if (!do_send)
 374                 return 0;
 375
 376         usb_autopm_get_interface(serial->interface);
 377         retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 378                 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
 379         usb_autopm_put_interface(serial->interface);
 380
 381         return retval;
 382 }
 383
 384 static void sierra_set_termios(struct tty_struct *tty,
 385                 struct usb_serial_port *port, struct ktermios *old_termios)
 386 {
 387         dev_dbg(&port->dev, "%s\n", __func__);
 388         tty_termios_copy_hw(tty->termios, old_termios);
 389         sierra_send_setup(port);
 390 }
 391
 392 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 393 {
 394         struct usb_serial_port *port = tty->driver_data;
 395         unsigned int value;
 396         struct sierra_port_private *portdata;
 397
 398         dev_dbg(&port->dev, "%s\n", __func__);
 399         portdata = usb_get_serial_port_data(port);
 400
 401         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 402                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 403                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 404                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 405                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 406                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 407
 408         return value;
 409 }
 410
 411 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
 412                         unsigned int set, unsigned int clear)
 413 {
 414         struct usb_serial_port *port = tty->driver_data;
 415         struct sierra_port_private *portdata;
 416
 417         portdata = usb_get_serial_port_data(port);
 418
 419         if (set & TIOCM_RTS)
 420                 portdata->rts_state = 1;
 421         if (set & TIOCM_DTR)
 422                 portdata->dtr_state = 1;
 423
 424         if (clear & TIOCM_RTS)
 425                 portdata->rts_state = 0;
 426         if (clear & TIOCM_DTR)
 427                 portdata->dtr_state = 0;
 428         return sierra_send_setup(port);
 429 }
 430
 431 static void sierra_release_urb(struct urb *urb)
 432 {
 433         struct usb_serial_port *port;
 434         if (urb) {
 435                 port =  urb->context;
 436                 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
 437                 kfree(urb->transfer_buffer);
 438                 usb_free_urb(urb);
 439         }
 440 }
 441
 442 static void sierra_outdat_callback(struct urb *urb)
 443 {
 444         struct usb_serial_port *port = urb->context;
 445         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 446         struct sierra_intf_private *intfdata;
 447         int status = urb->status;
 448
 449         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 450         intfdata = port->serial->private;
 451
 452         /* free up the transfer buffer, as usb_free_urb() does not do this */
 453         kfree(urb->transfer_buffer);
 454         usb_autopm_put_interface_async(port->serial->interface);
 455         if (status)
 456                 dev_dbg(&port->dev, "%s - nonzero write bulk status "
 457                     "received: %d\n", __func__, status);
 458
 459         spin_lock(&portdata->lock);
 460         --portdata->outstanding_urbs;
 461         spin_unlock(&portdata->lock);
 462         spin_lock(&intfdata->susp_lock);
 463         --intfdata->in_flight;
 464         spin_unlock(&intfdata->susp_lock);
 465
 466         usb_serial_port_softint(port);
 467 }
 468
 469 /* Write */
 470 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 471                                         const unsigned char *buf, int count)
 472 {
 473         struct sierra_port_private *portdata;
 474         struct sierra_intf_private *intfdata;
 475         struct usb_serial *serial = port->serial;
 476         unsigned long flags;
 477         unsigned char *buffer;
 478         struct urb *urb;
 479         size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
 480         int retval = 0;
 481
 482         /* verify that we actually have some data to write */
 483         if (count == 0)
 484                 return 0;
 485
 486         portdata = usb_get_serial_port_data(port);
 487         intfdata = serial->private;
 488
 489         dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
 490         spin_lock_irqsave(&portdata->lock, flags);
 491         dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
 492                 portdata->outstanding_urbs);
 493         if (portdata->outstanding_urbs > portdata->num_out_urbs) {
 494                 spin_unlock_irqrestore(&portdata->lock, flags);
 495                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 496                 return 0;
 497         }
 498         portdata->outstanding_urbs++;
 499         dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
 500                 portdata->outstanding_urbs);
 501         spin_unlock_irqrestore(&portdata->lock, flags);
 502
 503         retval = usb_autopm_get_interface_async(serial->interface);
 504         if (retval < 0) {
 505                 spin_lock_irqsave(&portdata->lock, flags);
 506                 portdata->outstanding_urbs--;
 507                 spin_unlock_irqrestore(&portdata->lock, flags);
 508                 goto error_simple;
 509         }
 510
 511         buffer = kmalloc(writesize, GFP_ATOMIC);
 512         if (!buffer) {
 513                 dev_err(&port->dev, "out of memory\n");
 514                 retval = -ENOMEM;
 515                 goto error_no_buffer;
 516         }
 517
 518         urb = usb_alloc_urb(0, GFP_ATOMIC);
 519         if (!urb) {
 520                 dev_err(&port->dev, "no more free urbs\n");
 521                 retval = -ENOMEM;
 522                 goto error_no_urb;
 523         }
 524
 525         memcpy(buffer, buf, writesize);
 526
 527         usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
 528
 529         usb_fill_bulk_urb(urb, serial->dev,
 530                           usb_sndbulkpipe(serial->dev,
 531                                           port->bulk_out_endpointAddress),
 532                           buffer, writesize, sierra_outdat_callback, port);
 533
 534         /* Handle the need to send a zero length packet */
 535         urb->transfer_flags |= URB_ZERO_PACKET;
 536
 537         spin_lock_irqsave(&intfdata->susp_lock, flags);
 538
 539         if (intfdata->suspended) {
 540                 usb_anchor_urb(urb, &portdata->delayed);
 541                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 542                 goto skip_power;
 543         } else {
 544                 usb_anchor_urb(urb, &portdata->active);
 545         }
 546         /* send it down the pipe */
 547         retval = usb_submit_urb(urb, GFP_ATOMIC);
 548         if (retval) {
 549                 usb_unanchor_urb(urb);
 550                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 551                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 552                         "with status = %d\n", __func__, retval);
 553                 goto error;
 554         } else {
 555                 intfdata->in_flight++;
 556                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 557         }
 558
 559 skip_power:
 560         /* we are done with this urb, so let the host driver
 561          * really free it when it is finished with it */
 562         usb_free_urb(urb);
 563
 564         return writesize;
 565 error:
 566         usb_free_urb(urb);
 567 error_no_urb:
 568         kfree(buffer);
 569 error_no_buffer:
 570         spin_lock_irqsave(&portdata->lock, flags);
 571         --portdata->outstanding_urbs;
 572         dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
 573                 portdata->outstanding_urbs);
 574         spin_unlock_irqrestore(&portdata->lock, flags);
 575         usb_autopm_put_interface_async(serial->interface);
 576 error_simple:
 577         return retval;
 578 }
 579
 580 static void sierra_indat_callback(struct urb *urb)
 581 {
 582         int err;
 583         int endpoint;
 584         struct usb_serial_port *port;
 585         struct tty_struct *tty;
 586         unsigned char *data = urb->transfer_buffer;
 587         int status = urb->status;
 588
 589         endpoint = usb_pipeendpoint(urb->pipe);
 590         port = urb->context;
 591
 592         dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
 593
 594         if (status) {
 595                 dev_dbg(&port->dev, "%s: nonzero status: %d on"
 596                         " endpoint %02x\n", __func__, status, endpoint);
 597         } else {
 598                 if (urb->actual_length) {
 599                         tty = tty_port_tty_get(&port->port);
 600                         if (tty) {
 601                                 tty_insert_flip_string(tty, data,
 602                                         urb->actual_length);
 603                                 tty_flip_buffer_push(tty);
 604
 605                                 tty_kref_put(tty);
 606                                 usb_serial_debug_data(debug, &port->dev,
 607                                         __func__, urb->actual_length, data);
 608                         }
 609                 } else {
 610                         dev_dbg(&port->dev, "%s: empty read urb"
 611                                 " received\n", __func__);
 612                 }
 613         }
 614
 615         /* Resubmit urb so we continue receiving */
 616         if (status != -ESHUTDOWN && status != -EPERM) {
 617                 usb_mark_last_busy(port->serial->dev);
 618                 err = usb_submit_urb(urb, GFP_ATOMIC);
 619                 if (err && err != -EPERM)
 620                         dev_err(&port->dev, "resubmit read urb failed."
 621                                 "(%d)\n", err);
 622         }
 623
 624         return;
 625 }
 626
 627 static void sierra_instat_callback(struct urb *urb)
 628 {
 629         int err;
 630         int status = urb->status;
 631         struct usb_serial_port *port =  urb->context;
 632         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 633         struct usb_serial *serial = port->serial;
 634
 635         dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
 636                 urb, port, portdata);
 637
 638         if (status == 0) {
 639                 struct usb_ctrlrequest *req_pkt =
 640                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 641
 642                 if (!req_pkt) {
 643                         dev_dbg(&port->dev, "%s: NULL req_pkt\n",
 644                                 __func__);
 645                         return;
 646                 }
 647                 if ((req_pkt->bRequestType == 0xA1) &&
 648                                 (req_pkt->bRequest == 0x20)) {
 649                         int old_dcd_state;
 650                         unsigned char signals = *((unsigned char *)
 651                                         urb->transfer_buffer +
 652                                         sizeof(struct usb_ctrlrequest));
 653                         struct tty_struct *tty;
 654
 655                         dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
 656                                 signals);
 657
 658                         old_dcd_state = portdata->dcd_state;
 659                         portdata->cts_state = 1;
 660                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 661                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 662                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 663
 664                         tty = tty_port_tty_get(&port->port);
 665                         if (tty && !C_CLOCAL(tty) &&
 666                                         old_dcd_state && !portdata->dcd_state)
 667                                 tty_hangup(tty);
 668                         tty_kref_put(tty);
 669                 } else {
 670                         dev_dbg(&port->dev, "%s: type %x req %x\n",
 671                                 __func__, req_pkt->bRequestType,
 672                                 req_pkt->bRequest);
 673                 }
 674         } else
 675                 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
 676
 677         /* Resubmit urb so we continue receiving IRQ data */
 678         if (status != -ESHUTDOWN && status != -ENOENT) {
 679                 usb_mark_last_busy(serial->dev);
 680                 urb->dev = serial->dev;
 681                 err = usb_submit_urb(urb, GFP_ATOMIC);
 682                 if (err && err != -EPERM)
 683                         dev_err(&port->dev, "%s: resubmit intr urb "
 684                                 "failed. (%d)\n", __func__, err);
 685         }
 686 }
 687
 688 static int sierra_write_room(struct tty_struct *tty)
 689 {
 690         struct usb_serial_port *port = tty->driver_data;
 691         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 692         unsigned long flags;
 693
 694         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 695
 696         /* try to give a good number back based on if we have any free urbs at
 697          * this point in time */
 698         spin_lock_irqsave(&portdata->lock, flags);
 699         if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
 700                 spin_unlock_irqrestore(&portdata->lock, flags);
 701                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 702                 return 0;
 703         }
 704         spin_unlock_irqrestore(&portdata->lock, flags);
 705
 706         return 2048;
 707 }
 708
 709 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
 710 {
 711         int i;
 712         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 713
 714         for (i = 0; i < portdata->num_in_urbs; i++)
 715                 usb_kill_urb(portdata->in_urbs[i]);
 716
 717         usb_kill_urb(port->interrupt_in_urb);
 718 }
 719
 720 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
 721 {
 722         int ok_cnt;
 723         int err = -EINVAL;
 724         int i;
 725         struct urb *urb;
 726         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 727
 728         ok_cnt = 0;
 729         for (i = 0; i < portdata->num_in_urbs; i++) {
 730                 urb = portdata->in_urbs[i];
 731                 if (!urb)
 732                         continue;
 733                 err = usb_submit_urb(urb, mem_flags);
 734                 if (err) {
 735                         dev_err(&port->dev, "%s: submit urb failed: %d\n",
 736                                 __func__, err);
 737                 } else {
 738                         ok_cnt++;
 739                 }
 740         }
 741
 742         if (ok_cnt && port->interrupt_in_urb) {
 743                 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
 744                 if (err) {
 745                         dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
 746                                 __func__, err);
 747                 }
 748         }
 749
 750         if (ok_cnt > 0) /* at least one rx urb submitted */
 751                 return 0;
 752         else
 753                 return err;
 754 }
 755
 756 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
 757                                         int dir, void *ctx, int len,
 758                                         gfp_t mem_flags,
 759                                         usb_complete_t callback)
 760 {
 761         struct urb      *urb;
 762         u8              *buf;
 763
 764         if (endpoint == -1)
 765                 return NULL;
 766
 767         urb = usb_alloc_urb(0, mem_flags);
 768         if (urb == NULL) {
 769                 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
 770                         __func__, endpoint);
 771                 return NULL;
 772         }
 773
 774         buf = kmalloc(len, mem_flags);
 775         if (buf) {
 776                 /* Fill URB using supplied data */
 777                 usb_fill_bulk_urb(urb, serial->dev,
 778                         usb_sndbulkpipe(serial->dev, endpoint) | dir,
 779                         buf, len, callback, ctx);
 780
 781                 /* debug */
 782                 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
 783                                 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
 784         } else {
 785                 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
 786                                 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
 787
 788                 sierra_release_urb(urb);
 789                 urb = NULL;
 790         }
 791
 792         return urb;
 793 }
 794
 795 static void sierra_close(struct usb_serial_port *port)
 796 {
 797         int i;
 798         struct usb_serial *serial = port->serial;
 799         struct sierra_port_private *portdata;
 800         struct sierra_intf_private *intfdata = port->serial->private;
 801
 802
 803         dev_dbg(&port->dev, "%s\n", __func__);
 804         portdata = usb_get_serial_port_data(port);
 805
 806         portdata->rts_state = 0;
 807         portdata->dtr_state = 0;
 808
 809         if (serial->dev) {
 810                 mutex_lock(&serial->disc_mutex);
 811                 if (!serial->disconnected) {
 812                         serial->interface->needs_remote_wakeup = 0;
 813                         usb_autopm_get_interface(serial->interface);
 814                         sierra_send_setup(port);
 815                 }
 816                 mutex_unlock(&serial->disc_mutex);
 817                 spin_lock_irq(&intfdata->susp_lock);
 818                 portdata->opened = 0;
 819                 spin_unlock_irq(&intfdata->susp_lock);
 820
 821
 822                 /* Stop reading urbs */
 823                 sierra_stop_rx_urbs(port);
 824                 /* .. and release them */
 825                 for (i = 0; i < portdata->num_in_urbs; i++) {
 826                         sierra_release_urb(portdata->in_urbs[i]);
 827                         portdata->in_urbs[i] = NULL;
 828                 }
 829         }
 830 }
 831
 832 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
 833 {
 834         struct sierra_port_private *portdata;
 835         struct usb_serial *serial = port->serial;
 836         struct sierra_intf_private *intfdata = serial->private;
 837         int i;
 838         int err;
 839         int endpoint;
 840         struct urb *urb;
 841
 842         portdata = usb_get_serial_port_data(port);
 843
 844         dev_dbg(&port->dev, "%s\n", __func__);
 845
 846         /* Set some sane defaults */
 847         portdata->rts_state = 1;
 848         portdata->dtr_state = 1;
 849
 850
 851         endpoint = port->bulk_in_endpointAddress;
 852         for (i = 0; i < portdata->num_in_urbs; i++) {
 853                 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
 854                                         IN_BUFLEN, GFP_KERNEL,
 855                                         sierra_indat_callback);
 856                 portdata->in_urbs[i] = urb;
 857         }
 858         /* clear halt condition */
 859         usb_clear_halt(serial->dev,
 860                         usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
 861
 862         err = sierra_submit_rx_urbs(port, GFP_KERNEL);
 863         if (err) {
 864                 /* get rid of everything as in close */
 865                 sierra_close(port);
 866                 /* restore balance for autopm */
 867                 usb_autopm_put_interface(serial->interface);
 868                 return err;
 869         }
 870         sierra_send_setup(port);
 871
 872         serial->interface->needs_remote_wakeup = 1;
 873         spin_lock_irq(&intfdata->susp_lock);
 874         portdata->opened = 1;
 875         spin_unlock_irq(&intfdata->susp_lock);
 876         usb_autopm_put_interface(serial->interface);
 877
 878         return 0;
 879 }
 880
 881
 882 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
 883 {
 884         struct usb_serial *serial = port->serial;
 885         struct sierra_port_private *portdata;
 886
 887         portdata = usb_get_serial_port_data(port);
 888         portdata->rts_state = on;
 889         portdata->dtr_state = on;
 890
 891         if (serial->dev) {
 892                 mutex_lock(&serial->disc_mutex);
 893                 if (!serial->disconnected)
 894                         sierra_send_setup(port);
 895                 mutex_unlock(&serial->disc_mutex);
 896         }
 897 }
 898
 899 static int sierra_startup(struct usb_serial *serial)
 900 {
 901         struct usb_serial_port *port;
 902         struct sierra_port_private *portdata;
 903         struct sierra_iface_info *himemoryp = NULL;
 904         int i;
 905         u8 ifnum;
 906
 907         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 908
 909         /* Set Device mode to D0 */
 910         sierra_set_power_state(serial->dev, 0x0000);
 911
 912         /* Check NMEA and set */
 913         if (nmea)
 914                 sierra_vsc_set_nmea(serial->dev, 1);
 915
 916         /* Now setup per port private data */
 917         for (i = 0; i < serial->num_ports; i++) {
 918                 port = serial->port[i];
 919                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 920                 if (!portdata) {
 921                         dev_dbg(&port->dev, "%s: kmalloc for "
 922                                 "sierra_port_private (%d) failed!\n",
 923                                 __func__, i);
 924                         return -ENOMEM;
 925                 }
 926                 spin_lock_init(&portdata->lock);
 927                 init_usb_anchor(&portdata->active);
 928                 init_usb_anchor(&portdata->delayed);
 929                 ifnum = i;
 930                 /* Assume low memory requirements */
 931                 portdata->num_out_urbs = N_OUT_URB;
 932                 portdata->num_in_urbs  = N_IN_URB;
 933
 934                 /* Determine actual memory requirements */
 935                 if (serial->num_ports == 1) {
 936                         /* Get interface number for composite device */
 937                         ifnum = sierra_calc_interface(serial);
 938                         himemoryp =
 939                             (struct sierra_iface_info *)&typeB_interface_list;
 940                         if (is_himemory(ifnum, himemoryp)) {
 941                                 portdata->num_out_urbs = N_OUT_URB_HM;
 942                                 portdata->num_in_urbs  = N_IN_URB_HM;
 943                         }
 944                 }
 945                 else {
 946                         himemoryp =
 947                             (struct sierra_iface_info *)&typeA_interface_list;
 948                         if (is_himemory(i, himemoryp)) {
 949                                 portdata->num_out_urbs = N_OUT_URB_HM;
 950                                 portdata->num_in_urbs  = N_IN_URB_HM;
 951                         }
 952                 }
 953                 dev_dbg(&serial->dev->dev,
 954                         "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
 955                         ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
 956                 /* Set the port private data pointer */
 957                 usb_set_serial_port_data(port, portdata);
 958         }
 959
 960         return 0;
 961 }
 962
 963 static void sierra_release(struct usb_serial *serial)
 964 {
 965         int i;
 966         struct usb_serial_port *port;
 967         struct sierra_port_private *portdata;
 968
 969         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 970
 971         for (i = 0; i < serial->num_ports; ++i) {
 972                 port = serial->port[i];
 973                 if (!port)
 974                         continue;
 975                 portdata = usb_get_serial_port_data(port);
 976                 if (!portdata)
 977                         continue;
 978                 kfree(portdata);
 979         }
 980 }
 981
 982 #ifdef CONFIG_PM
 983 static void stop_read_write_urbs(struct usb_serial *serial)
 984 {
 985         int i;
 986         struct usb_serial_port *port;
 987         struct sierra_port_private *portdata;
 988
 989         /* Stop reading/writing urbs */
 990         for (i = 0; i < serial->num_ports; ++i) {
 991                 port = serial->port[i];
 992                 portdata = usb_get_serial_port_data(port);
 993                 sierra_stop_rx_urbs(port);
 994                 usb_kill_anchored_urbs(&portdata->active);
 995         }
 996 }
 997
 998 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
 999 {
1000         struct sierra_intf_private *intfdata;
1001         int b;
1002
1003         if (message.event & PM_EVENT_AUTO) {
1004                 intfdata = serial->private;
1005                 spin_lock_irq(&intfdata->susp_lock);
1006                 b = intfdata->in_flight;
1007
1008                 if (b) {
1009                         spin_unlock_irq(&intfdata->susp_lock);
1010                         return -EBUSY;
1011                 } else {
1012                         intfdata->suspended = 1;
1013                         spin_unlock_irq(&intfdata->susp_lock);
1014                 }
1015         }
1016         stop_read_write_urbs(serial);
1017
1018         return 0;
1019 }
1020
1021 static int sierra_resume(struct usb_serial *serial)
1022 {
1023         struct usb_serial_port *port;
1024         struct sierra_intf_private *intfdata = serial->private;
1025         struct sierra_port_private *portdata;
1026         struct urb *urb;
1027         int ec = 0;
1028         int i, err;
1029
1030         spin_lock_irq(&intfdata->susp_lock);
1031         for (i = 0; i < serial->num_ports; i++) {
1032                 port = serial->port[i];
1033                 portdata = usb_get_serial_port_data(port);
1034
1035                 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1036                         usb_anchor_urb(urb, &portdata->active);
1037                         intfdata->in_flight++;
1038                         err = usb_submit_urb(urb, GFP_ATOMIC);
1039                         if (err < 0) {
1040                                 intfdata->in_flight--;
1041                                 usb_unanchor_urb(urb);
1042                                 usb_scuttle_anchored_urbs(&portdata->delayed);
1043                                 break;
1044                         }
1045                 }
1046
1047                 if (portdata->opened) {
1048                         err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1049                         if (err)
1050                                 ec++;
1051                 }
1052         }
1053         intfdata->suspended = 0;
1054         spin_unlock_irq(&intfdata->susp_lock);
1055
1056         return ec ? -EIO : 0;
1057 }
1058
1059 static int sierra_reset_resume(struct usb_interface *intf)
1060 {
1061         struct usb_serial *serial = usb_get_intfdata(intf);
1062         dev_err(&serial->dev->dev, "%s\n", __func__);
1063         return usb_serial_resume(intf);
1064 }
1065 #else
1066 #define sierra_suspend NULL
1067 #define sierra_resume NULL
1068 #define sierra_reset_resume NULL
1069 #endif
1070
1071 static struct usb_driver sierra_driver = {
1072         .name       = "sierra",
1073         .probe      = usb_serial_probe,
1074         .disconnect = usb_serial_disconnect,
1075         .suspend    = usb_serial_suspend,
1076         .resume     = usb_serial_resume,
1077         .reset_resume = sierra_reset_resume,
1078         .id_table   = id_table,
1079         .no_dynamic_id =        1,
1080         .supports_autosuspend = 1,
1081 };
1082
1083 static struct usb_serial_driver sierra_device = {
1084         .driver = {
1085                 .owner =        THIS_MODULE,
1086                 .name =         "sierra",
1087         },
1088         .description       = "Sierra USB modem",
1089         .id_table          = id_table,
1090         .usb_driver        = &sierra_driver,
1091         .calc_num_ports    = sierra_calc_num_ports,
1092         .probe             = sierra_probe,
1093         .open              = sierra_open,
1094         .close             = sierra_close,
1095         .dtr_rts           = sierra_dtr_rts,
1096         .write             = sierra_write,
1097         .write_room        = sierra_write_room,
1098         .set_termios       = sierra_set_termios,
1099         .tiocmget          = sierra_tiocmget,
1100         .tiocmset          = sierra_tiocmset,
1101         .attach            = sierra_startup,
1102         .release           = sierra_release,
1103         .suspend           = sierra_suspend,
1104         .resume            = sierra_resume,
1105         .read_int_callback = sierra_instat_callback,
1106 };
1107
1108 /* Functions used by new usb-serial code. */
1109 static int __init sierra_init(void)
1110 {
1111         int retval;
1112         retval = usb_serial_register(&sierra_device);
1113         if (retval)
1114                 goto failed_device_register;
1115
1116
1117         retval = usb_register(&sierra_driver);
1118         if (retval)
1119                 goto failed_driver_register;
1120
1121         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1122                DRIVER_DESC "\n");
1123
1124         return 0;
1125
1126 failed_driver_register:
1127         usb_serial_deregister(&sierra_device);
1128 failed_device_register:
1129         return retval;
1130 }
1131
1132 static void __exit sierra_exit(void)
1133 {
1134         usb_deregister(&sierra_driver);
1135         usb_serial_deregister(&sierra_device);
1136 }
1137
1138 module_init(sierra_init);
1139 module_exit(sierra_exit);
1140
1141 MODULE_AUTHOR(DRIVER_AUTHOR);
1142 MODULE_DESCRIPTION(DRIVER_DESC);
1143 MODULE_VERSION(DRIVER_VERSION);
1144 MODULE_LICENSE("GPL");
1145
1146 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1147 MODULE_PARM_DESC(nmea, "NMEA streaming");
1148
1149 module_param(debug, bool, S_IRUGO | S_IWUSR);
1150 MODULE_PARM_DESC(debug, "Debug messages");