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(0x0f3d, 0x68A3),   /* Airprime/Sierra Wireless Direct IP modems */
 305           .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
 306         },
 307        { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
 308
 309         { }
 310 };
 311 MODULE_DEVICE_TABLE(usb, id_table);
 312
 313
 314 struct sierra_port_private {
 315         spinlock_t lock;        /* lock the structure */
 316         int outstanding_urbs;   /* number of out urbs in flight */
 317         struct usb_anchor active;
 318         struct usb_anchor delayed;
 319
 320         int num_out_urbs;
 321         int num_in_urbs;
 322         /* Input endpoints and buffers for this port */
 323         struct urb *in_urbs[N_IN_URB_HM];
 324
 325         /* Settings for the port */
 326         int rts_state;  /* Handshaking pins (outputs) */
 327         int dtr_state;
 328         int cts_state;  /* Handshaking pins (inputs) */
 329         int dsr_state;
 330         int dcd_state;
 331         int ri_state;
 332         unsigned int opened:1;
 333 };
 334
 335 static int sierra_send_setup(struct usb_serial_port *port)
 336 {
 337         struct usb_serial *serial = port->serial;
 338         struct sierra_port_private *portdata;
 339         __u16 interface = 0;
 340         int val = 0;
 341         int do_send = 0;
 342         int retval;
 343
 344         dev_dbg(&port->dev, "%s\n", __func__);
 345
 346         portdata = usb_get_serial_port_data(port);
 347
 348         if (portdata->dtr_state)
 349                 val |= 0x01;
 350         if (portdata->rts_state)
 351                 val |= 0x02;
 352
 353         /* If composite device then properly report interface */
 354         if (serial->num_ports == 1) {
 355                 interface = sierra_calc_interface(serial);
 356                 /* Control message is sent only to interfaces with
 357                  * interrupt_in endpoints
 358                  */
 359                 if (port->interrupt_in_urb) {
 360                         /* send control message */
 361                         do_send = 1;
 362                 }
 363         }
 364
 365         /* Otherwise the need to do non-composite mapping */
 366         else {
 367                 if (port->bulk_out_endpointAddress == 2)
 368                         interface = 0;
 369                 else if (port->bulk_out_endpointAddress == 4)
 370                         interface = 1;
 371                 else if (port->bulk_out_endpointAddress == 5)
 372                         interface = 2;
 373
 374                 do_send = 1;
 375         }
 376         if (!do_send)
 377                 return 0;
 378
 379         usb_autopm_get_interface(serial->interface);
 380         retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 381                 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
 382         usb_autopm_put_interface(serial->interface);
 383
 384         return retval;
 385 }
 386
 387 static void sierra_set_termios(struct tty_struct *tty,
 388                 struct usb_serial_port *port, struct ktermios *old_termios)
 389 {
 390         dev_dbg(&port->dev, "%s\n", __func__);
 391         tty_termios_copy_hw(tty->termios, old_termios);
 392         sierra_send_setup(port);
 393 }
 394
 395 static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 396 {
 397         struct usb_serial_port *port = tty->driver_data;
 398         unsigned int value;
 399         struct sierra_port_private *portdata;
 400
 401         dev_dbg(&port->dev, "%s\n", __func__);
 402         portdata = usb_get_serial_port_data(port);
 403
 404         value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
 405                 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
 406                 ((portdata->cts_state) ? TIOCM_CTS : 0) |
 407                 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
 408                 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
 409                 ((portdata->ri_state) ? TIOCM_RNG : 0);
 410
 411         return value;
 412 }
 413
 414 static int sierra_tiocmset(struct tty_struct *tty, struct file *file,
 415                         unsigned int set, unsigned int clear)
 416 {
 417         struct usb_serial_port *port = tty->driver_data;
 418         struct sierra_port_private *portdata;
 419
 420         portdata = usb_get_serial_port_data(port);
 421
 422         if (set & TIOCM_RTS)
 423                 portdata->rts_state = 1;
 424         if (set & TIOCM_DTR)
 425                 portdata->dtr_state = 1;
 426
 427         if (clear & TIOCM_RTS)
 428                 portdata->rts_state = 0;
 429         if (clear & TIOCM_DTR)
 430                 portdata->dtr_state = 0;
 431         return sierra_send_setup(port);
 432 }
 433
 434 static void sierra_release_urb(struct urb *urb)
 435 {
 436         struct usb_serial_port *port;
 437         if (urb) {
 438                 port =  urb->context;
 439                 dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
 440                 kfree(urb->transfer_buffer);
 441                 usb_free_urb(urb);
 442         }
 443 }
 444
 445 static void sierra_outdat_callback(struct urb *urb)
 446 {
 447         struct usb_serial_port *port = urb->context;
 448         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 449         struct sierra_intf_private *intfdata;
 450         int status = urb->status;
 451
 452         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 453         intfdata = port->serial->private;
 454
 455         /* free up the transfer buffer, as usb_free_urb() does not do this */
 456         kfree(urb->transfer_buffer);
 457         usb_autopm_put_interface_async(port->serial->interface);
 458         if (status)
 459                 dev_dbg(&port->dev, "%s - nonzero write bulk status "
 460                     "received: %d\n", __func__, status);
 461
 462         spin_lock(&portdata->lock);
 463         --portdata->outstanding_urbs;
 464         spin_unlock(&portdata->lock);
 465         spin_lock(&intfdata->susp_lock);
 466         --intfdata->in_flight;
 467         spin_unlock(&intfdata->susp_lock);
 468
 469         usb_serial_port_softint(port);
 470 }
 471
 472 /* Write */
 473 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 474                                         const unsigned char *buf, int count)
 475 {
 476         struct sierra_port_private *portdata;
 477         struct sierra_intf_private *intfdata;
 478         struct usb_serial *serial = port->serial;
 479         unsigned long flags;
 480         unsigned char *buffer;
 481         struct urb *urb;
 482         size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
 483         int retval = 0;
 484
 485         /* verify that we actually have some data to write */
 486         if (count == 0)
 487                 return 0;
 488
 489         portdata = usb_get_serial_port_data(port);
 490         intfdata = serial->private;
 491
 492         dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
 493         spin_lock_irqsave(&portdata->lock, flags);
 494         dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
 495                 portdata->outstanding_urbs);
 496         if (portdata->outstanding_urbs > portdata->num_out_urbs) {
 497                 spin_unlock_irqrestore(&portdata->lock, flags);
 498                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 499                 return 0;
 500         }
 501         portdata->outstanding_urbs++;
 502         dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
 503                 portdata->outstanding_urbs);
 504         spin_unlock_irqrestore(&portdata->lock, flags);
 505
 506         retval = usb_autopm_get_interface_async(serial->interface);
 507         if (retval < 0) {
 508                 spin_lock_irqsave(&portdata->lock, flags);
 509                 portdata->outstanding_urbs--;
 510                 spin_unlock_irqrestore(&portdata->lock, flags);
 511                 goto error_simple;
 512         }
 513
 514         buffer = kmalloc(writesize, GFP_ATOMIC);
 515         if (!buffer) {
 516                 dev_err(&port->dev, "out of memory\n");
 517                 retval = -ENOMEM;
 518                 goto error_no_buffer;
 519         }
 520
 521         urb = usb_alloc_urb(0, GFP_ATOMIC);
 522         if (!urb) {
 523                 dev_err(&port->dev, "no more free urbs\n");
 524                 retval = -ENOMEM;
 525                 goto error_no_urb;
 526         }
 527
 528         memcpy(buffer, buf, writesize);
 529
 530         usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
 531
 532         usb_fill_bulk_urb(urb, serial->dev,
 533                           usb_sndbulkpipe(serial->dev,
 534                                           port->bulk_out_endpointAddress),
 535                           buffer, writesize, sierra_outdat_callback, port);
 536
 537         /* Handle the need to send a zero length packet */
 538         urb->transfer_flags |= URB_ZERO_PACKET;
 539
 540         spin_lock_irqsave(&intfdata->susp_lock, flags);
 541
 542         if (intfdata->suspended) {
 543                 usb_anchor_urb(urb, &portdata->delayed);
 544                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 545                 goto skip_power;
 546         } else {
 547                 usb_anchor_urb(urb, &portdata->active);
 548         }
 549         /* send it down the pipe */
 550         retval = usb_submit_urb(urb, GFP_ATOMIC);
 551         if (retval) {
 552                 usb_unanchor_urb(urb);
 553                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 554                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
 555                         "with status = %d\n", __func__, retval);
 556                 goto error;
 557         } else {
 558                 intfdata->in_flight++;
 559                 spin_unlock_irqrestore(&intfdata->susp_lock, flags);
 560         }
 561
 562 skip_power:
 563         /* we are done with this urb, so let the host driver
 564          * really free it when it is finished with it */
 565         usb_free_urb(urb);
 566
 567         return writesize;
 568 error:
 569         usb_free_urb(urb);
 570 error_no_urb:
 571         kfree(buffer);
 572 error_no_buffer:
 573         spin_lock_irqsave(&portdata->lock, flags);
 574         --portdata->outstanding_urbs;
 575         dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
 576                 portdata->outstanding_urbs);
 577         spin_unlock_irqrestore(&portdata->lock, flags);
 578         usb_autopm_put_interface_async(serial->interface);
 579 error_simple:
 580         return retval;
 581 }
 582
 583 static void sierra_indat_callback(struct urb *urb)
 584 {
 585         int err;
 586         int endpoint;
 587         struct usb_serial_port *port;
 588         struct tty_struct *tty;
 589         unsigned char *data = urb->transfer_buffer;
 590         int status = urb->status;
 591
 592         endpoint = usb_pipeendpoint(urb->pipe);
 593         port = urb->context;
 594
 595         dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
 596
 597         if (status) {
 598                 dev_dbg(&port->dev, "%s: nonzero status: %d on"
 599                         " endpoint %02x\n", __func__, status, endpoint);
 600         } else {
 601                 if (urb->actual_length) {
 602                         tty = tty_port_tty_get(&port->port);
 603                         if (tty) {
 604                                 tty_insert_flip_string(tty, data,
 605                                         urb->actual_length);
 606                                 tty_flip_buffer_push(tty);
 607
 608                                 tty_kref_put(tty);
 609                                 usb_serial_debug_data(debug, &port->dev,
 610                                         __func__, urb->actual_length, data);
 611                         }
 612                 } else {
 613                         dev_dbg(&port->dev, "%s: empty read urb"
 614                                 " received\n", __func__);
 615                 }
 616         }
 617
 618         /* Resubmit urb so we continue receiving */
 619         if (status != -ESHUTDOWN && status != -EPERM) {
 620                 usb_mark_last_busy(port->serial->dev);
 621                 err = usb_submit_urb(urb, GFP_ATOMIC);
 622                 if (err && err != -EPERM)
 623                         dev_err(&port->dev, "resubmit read urb failed."
 624                                 "(%d)\n", err);
 625         }
 626 }
 627
 628 static void sierra_instat_callback(struct urb *urb)
 629 {
 630         int err;
 631         int status = urb->status;
 632         struct usb_serial_port *port =  urb->context;
 633         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 634         struct usb_serial *serial = port->serial;
 635
 636         dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
 637                 urb, port, portdata);
 638
 639         if (status == 0) {
 640                 struct usb_ctrlrequest *req_pkt =
 641                                 (struct usb_ctrlrequest *)urb->transfer_buffer;
 642
 643                 if (!req_pkt) {
 644                         dev_dbg(&port->dev, "%s: NULL req_pkt\n",
 645                                 __func__);
 646                         return;
 647                 }
 648                 if ((req_pkt->bRequestType == 0xA1) &&
 649                                 (req_pkt->bRequest == 0x20)) {
 650                         int old_dcd_state;
 651                         unsigned char signals = *((unsigned char *)
 652                                         urb->transfer_buffer +
 653                                         sizeof(struct usb_ctrlrequest));
 654                         struct tty_struct *tty;
 655
 656                         dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
 657                                 signals);
 658
 659                         old_dcd_state = portdata->dcd_state;
 660                         portdata->cts_state = 1;
 661                         portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
 662                         portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 663                         portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 664
 665                         tty = tty_port_tty_get(&port->port);
 666                         if (tty && !C_CLOCAL(tty) &&
 667                                         old_dcd_state && !portdata->dcd_state)
 668                                 tty_hangup(tty);
 669                         tty_kref_put(tty);
 670                 } else {
 671                         dev_dbg(&port->dev, "%s: type %x req %x\n",
 672                                 __func__, req_pkt->bRequestType,
 673                                 req_pkt->bRequest);
 674                 }
 675         } else
 676                 dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
 677
 678         /* Resubmit urb so we continue receiving IRQ data */
 679         if (status != -ESHUTDOWN && status != -ENOENT) {
 680                 usb_mark_last_busy(serial->dev);
 681                 urb->dev = serial->dev;
 682                 err = usb_submit_urb(urb, GFP_ATOMIC);
 683                 if (err && err != -EPERM)
 684                         dev_err(&port->dev, "%s: resubmit intr urb "
 685                                 "failed. (%d)\n", __func__, err);
 686         }
 687 }
 688
 689 static int sierra_write_room(struct tty_struct *tty)
 690 {
 691         struct usb_serial_port *port = tty->driver_data;
 692         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 693         unsigned long flags;
 694
 695         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 696
 697         /* try to give a good number back based on if we have any free urbs at
 698          * this point in time */
 699         spin_lock_irqsave(&portdata->lock, flags);
 700         if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) {
 701                 spin_unlock_irqrestore(&portdata->lock, flags);
 702                 dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 703                 return 0;
 704         }
 705         spin_unlock_irqrestore(&portdata->lock, flags);
 706
 707         return 2048;
 708 }
 709
 710 static void sierra_stop_rx_urbs(struct usb_serial_port *port)
 711 {
 712         int i;
 713         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 714
 715         for (i = 0; i < portdata->num_in_urbs; i++)
 716                 usb_kill_urb(portdata->in_urbs[i]);
 717
 718         usb_kill_urb(port->interrupt_in_urb);
 719 }
 720
 721 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
 722 {
 723         int ok_cnt;
 724         int err = -EINVAL;
 725         int i;
 726         struct urb *urb;
 727         struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 728
 729         ok_cnt = 0;
 730         for (i = 0; i < portdata->num_in_urbs; i++) {
 731                 urb = portdata->in_urbs[i];
 732                 if (!urb)
 733                         continue;
 734                 err = usb_submit_urb(urb, mem_flags);
 735                 if (err) {
 736                         dev_err(&port->dev, "%s: submit urb failed: %d\n",
 737                                 __func__, err);
 738                 } else {
 739                         ok_cnt++;
 740                 }
 741         }
 742
 743         if (ok_cnt && port->interrupt_in_urb) {
 744                 err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
 745                 if (err) {
 746                         dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
 747                                 __func__, err);
 748                 }
 749         }
 750
 751         if (ok_cnt > 0) /* at least one rx urb submitted */
 752                 return 0;
 753         else
 754                 return err;
 755 }
 756
 757 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
 758                                         int dir, void *ctx, int len,
 759                                         gfp_t mem_flags,
 760                                         usb_complete_t callback)
 761 {
 762         struct urb      *urb;
 763         u8              *buf;
 764
 765         if (endpoint == -1)
 766                 return NULL;
 767
 768         urb = usb_alloc_urb(0, mem_flags);
 769         if (urb == NULL) {
 770                 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
 771                         __func__, endpoint);
 772                 return NULL;
 773         }
 774
 775         buf = kmalloc(len, mem_flags);
 776         if (buf) {
 777                 /* Fill URB using supplied data */
 778                 usb_fill_bulk_urb(urb, serial->dev,
 779                         usb_sndbulkpipe(serial->dev, endpoint) | dir,
 780                         buf, len, callback, ctx);
 781
 782                 /* debug */
 783                 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
 784                                 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
 785         } else {
 786                 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
 787                                 dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
 788
 789                 sierra_release_urb(urb);
 790                 urb = NULL;
 791         }
 792
 793         return urb;
 794 }
 795
 796 static void sierra_close(struct usb_serial_port *port)
 797 {
 798         int i;
 799         struct usb_serial *serial = port->serial;
 800         struct sierra_port_private *portdata;
 801         struct sierra_intf_private *intfdata = port->serial->private;
 802
 803
 804         dev_dbg(&port->dev, "%s\n", __func__);
 805         portdata = usb_get_serial_port_data(port);
 806
 807         portdata->rts_state = 0;
 808         portdata->dtr_state = 0;
 809
 810         if (serial->dev) {
 811                 mutex_lock(&serial->disc_mutex);
 812                 if (!serial->disconnected) {
 813                         serial->interface->needs_remote_wakeup = 0;
 814                         usb_autopm_get_interface(serial->interface);
 815                         sierra_send_setup(port);
 816                 }
 817                 mutex_unlock(&serial->disc_mutex);
 818                 spin_lock_irq(&intfdata->susp_lock);
 819                 portdata->opened = 0;
 820                 spin_unlock_irq(&intfdata->susp_lock);
 821
 822
 823                 /* Stop reading urbs */
 824                 sierra_stop_rx_urbs(port);
 825                 /* .. and release them */
 826                 for (i = 0; i < portdata->num_in_urbs; i++) {
 827                         sierra_release_urb(portdata->in_urbs[i]);
 828                         portdata->in_urbs[i] = NULL;
 829                 }
 830         }
 831 }
 832
 833 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
 834 {
 835         struct sierra_port_private *portdata;
 836         struct usb_serial *serial = port->serial;
 837         struct sierra_intf_private *intfdata = serial->private;
 838         int i;
 839         int err;
 840         int endpoint;
 841         struct urb *urb;
 842
 843         portdata = usb_get_serial_port_data(port);
 844
 845         dev_dbg(&port->dev, "%s\n", __func__);
 846
 847         /* Set some sane defaults */
 848         portdata->rts_state = 1;
 849         portdata->dtr_state = 1;
 850
 851
 852         endpoint = port->bulk_in_endpointAddress;
 853         for (i = 0; i < portdata->num_in_urbs; i++) {
 854                 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
 855                                         IN_BUFLEN, GFP_KERNEL,
 856                                         sierra_indat_callback);
 857                 portdata->in_urbs[i] = urb;
 858         }
 859         /* clear halt condition */
 860         usb_clear_halt(serial->dev,
 861                         usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
 862
 863         err = sierra_submit_rx_urbs(port, GFP_KERNEL);
 864         if (err) {
 865                 /* get rid of everything as in close */
 866                 sierra_close(port);
 867                 /* restore balance for autopm */
 868                 usb_autopm_put_interface(serial->interface);
 869                 return err;
 870         }
 871         sierra_send_setup(port);
 872
 873         serial->interface->needs_remote_wakeup = 1;
 874         spin_lock_irq(&intfdata->susp_lock);
 875         portdata->opened = 1;
 876         spin_unlock_irq(&intfdata->susp_lock);
 877         usb_autopm_put_interface(serial->interface);
 878
 879         return 0;
 880 }
 881
 882
 883 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
 884 {
 885         struct usb_serial *serial = port->serial;
 886         struct sierra_port_private *portdata;
 887
 888         portdata = usb_get_serial_port_data(port);
 889         portdata->rts_state = on;
 890         portdata->dtr_state = on;
 891
 892         if (serial->dev) {
 893                 mutex_lock(&serial->disc_mutex);
 894                 if (!serial->disconnected)
 895                         sierra_send_setup(port);
 896                 mutex_unlock(&serial->disc_mutex);
 897         }
 898 }
 899
 900 static int sierra_startup(struct usb_serial *serial)
 901 {
 902         struct usb_serial_port *port;
 903         struct sierra_port_private *portdata;
 904         struct sierra_iface_info *himemoryp = NULL;
 905         int i;
 906         u8 ifnum;
 907
 908         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 909
 910         /* Set Device mode to D0 */
 911         sierra_set_power_state(serial->dev, 0x0000);
 912
 913         /* Check NMEA and set */
 914         if (nmea)
 915                 sierra_vsc_set_nmea(serial->dev, 1);
 916
 917         /* Now setup per port private data */
 918         for (i = 0; i < serial->num_ports; i++) {
 919                 port = serial->port[i];
 920                 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 921                 if (!portdata) {
 922                         dev_dbg(&port->dev, "%s: kmalloc for "
 923                                 "sierra_port_private (%d) failed!\n",
 924                                 __func__, i);
 925                         return -ENOMEM;
 926                 }
 927                 spin_lock_init(&portdata->lock);
 928                 init_usb_anchor(&portdata->active);
 929                 init_usb_anchor(&portdata->delayed);
 930                 ifnum = i;
 931                 /* Assume low memory requirements */
 932                 portdata->num_out_urbs = N_OUT_URB;
 933                 portdata->num_in_urbs  = N_IN_URB;
 934
 935                 /* Determine actual memory requirements */
 936                 if (serial->num_ports == 1) {
 937                         /* Get interface number for composite device */
 938                         ifnum = sierra_calc_interface(serial);
 939                         himemoryp =
 940                             (struct sierra_iface_info *)&typeB_interface_list;
 941                         if (is_himemory(ifnum, himemoryp)) {
 942                                 portdata->num_out_urbs = N_OUT_URB_HM;
 943                                 portdata->num_in_urbs  = N_IN_URB_HM;
 944                         }
 945                 }
 946                 else {
 947                         himemoryp =
 948                             (struct sierra_iface_info *)&typeA_interface_list;
 949                         if (is_himemory(i, himemoryp)) {
 950                                 portdata->num_out_urbs = N_OUT_URB_HM;
 951                                 portdata->num_in_urbs  = N_IN_URB_HM;
 952                         }
 953                 }
 954                 dev_dbg(&serial->dev->dev,
 955                         "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
 956                         ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
 957                 /* Set the port private data pointer */
 958                 usb_set_serial_port_data(port, portdata);
 959         }
 960
 961         return 0;
 962 }
 963
 964 static void sierra_release(struct usb_serial *serial)
 965 {
 966         int i;
 967         struct usb_serial_port *port;
 968         struct sierra_port_private *portdata;
 969
 970         dev_dbg(&serial->dev->dev, "%s\n", __func__);
 971
 972         for (i = 0; i < serial->num_ports; ++i) {
 973                 port = serial->port[i];
 974                 if (!port)
 975                         continue;
 976                 portdata = usb_get_serial_port_data(port);
 977                 if (!portdata)
 978                         continue;
 979                 kfree(portdata);
 980         }
 981 }
 982
 983 #ifdef CONFIG_PM
 984 static void stop_read_write_urbs(struct usb_serial *serial)
 985 {
 986         int i;
 987         struct usb_serial_port *port;
 988         struct sierra_port_private *portdata;
 989
 990         /* Stop reading/writing urbs */
 991         for (i = 0; i < serial->num_ports; ++i) {
 992                 port = serial->port[i];
 993                 portdata = usb_get_serial_port_data(port);
 994                 sierra_stop_rx_urbs(port);
 995                 usb_kill_anchored_urbs(&portdata->active);
 996         }
 997 }
 998
 999 static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
1000 {
1001         struct sierra_intf_private *intfdata;
1002         int b;
1003
1004         if (message.event & PM_EVENT_AUTO) {
1005                 intfdata = serial->private;
1006                 spin_lock_irq(&intfdata->susp_lock);
1007                 b = intfdata->in_flight;
1008
1009                 if (b) {
1010                         spin_unlock_irq(&intfdata->susp_lock);
1011                         return -EBUSY;
1012                 } else {
1013                         intfdata->suspended = 1;
1014                         spin_unlock_irq(&intfdata->susp_lock);
1015                 }
1016         }
1017         stop_read_write_urbs(serial);
1018
1019         return 0;
1020 }
1021
1022 static int sierra_resume(struct usb_serial *serial)
1023 {
1024         struct usb_serial_port *port;
1025         struct sierra_intf_private *intfdata = serial->private;
1026         struct sierra_port_private *portdata;
1027         struct urb *urb;
1028         int ec = 0;
1029         int i, err;
1030
1031         spin_lock_irq(&intfdata->susp_lock);
1032         for (i = 0; i < serial->num_ports; i++) {
1033                 port = serial->port[i];
1034                 portdata = usb_get_serial_port_data(port);
1035
1036                 while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1037                         usb_anchor_urb(urb, &portdata->active);
1038                         intfdata->in_flight++;
1039                         err = usb_submit_urb(urb, GFP_ATOMIC);
1040                         if (err < 0) {
1041                                 intfdata->in_flight--;
1042                                 usb_unanchor_urb(urb);
1043                                 usb_scuttle_anchored_urbs(&portdata->delayed);
1044                                 break;
1045                         }
1046                 }
1047
1048                 if (portdata->opened) {
1049                         err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1050                         if (err)
1051                                 ec++;
1052                 }
1053         }
1054         intfdata->suspended = 0;
1055         spin_unlock_irq(&intfdata->susp_lock);
1056
1057         return ec ? -EIO : 0;
1058 }
1059
1060 static int sierra_reset_resume(struct usb_interface *intf)
1061 {
1062         struct usb_serial *serial = usb_get_intfdata(intf);
1063         dev_err(&serial->dev->dev, "%s\n", __func__);
1064         return usb_serial_resume(intf);
1065 }
1066 #else
1067 #define sierra_suspend NULL
1068 #define sierra_resume NULL
1069 #define sierra_reset_resume NULL
1070 #endif
1071
1072 static struct usb_driver sierra_driver = {
1073         .name       = "sierra",
1074         .probe      = usb_serial_probe,
1075         .disconnect = usb_serial_disconnect,
1076         .suspend    = usb_serial_suspend,
1077         .resume     = usb_serial_resume,
1078         .reset_resume = sierra_reset_resume,
1079         .id_table   = id_table,
1080         .no_dynamic_id =        1,
1081         .supports_autosuspend = 1,
1082 };
1083
1084 static struct usb_serial_driver sierra_device = {
1085         .driver = {
1086                 .owner =        THIS_MODULE,
1087                 .name =         "sierra",
1088         },
1089         .description       = "Sierra USB modem",
1090         .id_table          = id_table,
1091         .usb_driver        = &sierra_driver,
1092         .calc_num_ports    = sierra_calc_num_ports,
1093         .probe             = sierra_probe,
1094         .open              = sierra_open,
1095         .close             = sierra_close,
1096         .dtr_rts           = sierra_dtr_rts,
1097         .write             = sierra_write,
1098         .write_room        = sierra_write_room,
1099         .set_termios       = sierra_set_termios,
1100         .tiocmget          = sierra_tiocmget,
1101         .tiocmset          = sierra_tiocmset,
1102         .attach            = sierra_startup,
1103         .release           = sierra_release,
1104         .suspend           = sierra_suspend,
1105         .resume            = sierra_resume,
1106         .read_int_callback = sierra_instat_callback,
1107 };
1108
1109 /* Functions used by new usb-serial code. */
1110 static int __init sierra_init(void)
1111 {
1112         int retval;
1113         retval = usb_serial_register(&sierra_device);
1114         if (retval)
1115                 goto failed_device_register;
1116
1117
1118         retval = usb_register(&sierra_driver);
1119         if (retval)
1120                 goto failed_driver_register;
1121
1122         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1123                DRIVER_DESC "\n");
1124
1125         return 0;
1126
1127 failed_driver_register:
1128         usb_serial_deregister(&sierra_device);
1129 failed_device_register:
1130         return retval;
1131 }
1132
1133 static void __exit sierra_exit(void)
1134 {
1135         usb_deregister(&sierra_driver);
1136         usb_serial_deregister(&sierra_device);
1137 }
1138
1139 module_init(sierra_init);
1140 module_exit(sierra_exit);
1141
1142 MODULE_AUTHOR(DRIVER_AUTHOR);
1143 MODULE_DESCRIPTION(DRIVER_DESC);
1144 MODULE_VERSION(DRIVER_VERSION);
1145 MODULE_LICENSE("GPL");
1146
1147 module_param(nmea, bool, S_IRUGO | S_IWUSR);
1148 MODULE_PARM_DESC(nmea, "NMEA streaming");
1149
1150 module_param(debug, bool, S_IRUGO | S_IWUSR);
1151 MODULE_PARM_DESC(debug, "Debug messages");