LXR linux/drivers/usb/serial/qcserial.c

   1/*
   2 * Qualcomm Serial USB driver
   3 *
   4 *      Copyright (c) 2008 QUALCOMM Incorporated.
   5 *      Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
   6 *      Copyright (c) 2009 Novell Inc.
   7 *
   8 *      This program is free software; you can redistribute it and/or
   9 *      modify it under the terms of the GNU General Public License version
  10 *      2 as published by the Free Software Foundation.
  11 *
  12 */
  13
  14#include <linux/tty.h>
  15#include <linux/tty_flip.h>
  16#include <linux/module.h>
  17#include <linux/usb.h>
  18#include <linux/usb/serial.h>
  19#include <linux/slab.h>
  20#include "usb-wwan.h"
  21
  22#define DRIVER_AUTHOR "Qualcomm Inc"
  23#define DRIVER_DESC "Qualcomm USB Serial driver"
  24
  25#define QUECTEL_EC20_PID        0x9215
  26
  27/* standard device layouts supported by this driver */
  28enum qcserial_layouts {
  29        QCSERIAL_G2K = 0,       /* Gobi 2000 */
  30        QCSERIAL_G1K = 1,       /* Gobi 1000 */
  31        QCSERIAL_SWI = 2,       /* Sierra Wireless */
  32        QCSERIAL_HWI = 3,       /* Huawei */
  33};
  34
  35#define DEVICE_G1K(v, p) \
  36        USB_DEVICE(v, p), .driver_info = QCSERIAL_G1K
  37#define DEVICE_SWI(v, p) \
  38        USB_DEVICE(v, p), .driver_info = QCSERIAL_SWI
  39#define DEVICE_HWI(v, p) \
  40        USB_DEVICE(v, p), .driver_info = QCSERIAL_HWI
  41
  42static const struct usb_device_id id_table[] = {
  43        /* Gobi 1000 devices */
  44        {DEVICE_G1K(0x05c6, 0x9211)},   /* Acer Gobi QDL device */
  45        {DEVICE_G1K(0x05c6, 0x9212)},   /* Acer Gobi Modem Device */
  46        {DEVICE_G1K(0x03f0, 0x1f1d)},   /* HP un2400 Gobi Modem Device */
  47        {DEVICE_G1K(0x03f0, 0x201d)},   /* HP un2400 Gobi QDL Device */
  48        {DEVICE_G1K(0x04da, 0x250d)},   /* Panasonic Gobi Modem device */
  49        {DEVICE_G1K(0x04da, 0x250c)},   /* Panasonic Gobi QDL device */
  50        {DEVICE_G1K(0x413c, 0x8172)},   /* Dell Gobi Modem device */
  51        {DEVICE_G1K(0x413c, 0x8171)},   /* Dell Gobi QDL device */
  52        {DEVICE_G1K(0x1410, 0xa001)},   /* Novatel/Verizon USB-1000 */
  53        {DEVICE_G1K(0x1410, 0xa002)},   /* Novatel Gobi Modem device */
  54        {DEVICE_G1K(0x1410, 0xa003)},   /* Novatel Gobi Modem device */
  55        {DEVICE_G1K(0x1410, 0xa004)},   /* Novatel Gobi Modem device */
  56        {DEVICE_G1K(0x1410, 0xa005)},   /* Novatel Gobi Modem device */
  57        {DEVICE_G1K(0x1410, 0xa006)},   /* Novatel Gobi Modem device */
  58        {DEVICE_G1K(0x1410, 0xa007)},   /* Novatel Gobi Modem device */
  59        {DEVICE_G1K(0x1410, 0xa008)},   /* Novatel Gobi QDL device */
  60        {DEVICE_G1K(0x0b05, 0x1776)},   /* Asus Gobi Modem device */
  61        {DEVICE_G1K(0x0b05, 0x1774)},   /* Asus Gobi QDL device */
  62        {DEVICE_G1K(0x19d2, 0xfff3)},   /* ONDA Gobi Modem device */
  63        {DEVICE_G1K(0x19d2, 0xfff2)},   /* ONDA Gobi QDL device */
  64        {DEVICE_G1K(0x1557, 0x0a80)},   /* OQO Gobi QDL device */
  65        {DEVICE_G1K(0x05c6, 0x9001)},   /* Generic Gobi Modem device */
  66        {DEVICE_G1K(0x05c6, 0x9002)},   /* Generic Gobi Modem device */
  67        {DEVICE_G1K(0x05c6, 0x9202)},   /* Generic Gobi Modem device */
  68        {DEVICE_G1K(0x05c6, 0x9203)},   /* Generic Gobi Modem device */
  69        {DEVICE_G1K(0x05c6, 0x9222)},   /* Generic Gobi Modem device */
  70        {DEVICE_G1K(0x05c6, 0x9008)},   /* Generic Gobi QDL device */
  71        {DEVICE_G1K(0x05c6, 0x9009)},   /* Generic Gobi Modem device */
  72        {DEVICE_G1K(0x05c6, 0x9201)},   /* Generic Gobi QDL device */
  73        {DEVICE_G1K(0x05c6, 0x9221)},   /* Generic Gobi QDL device */
  74        {DEVICE_G1K(0x05c6, 0x9231)},   /* Generic Gobi QDL device */
  75        {DEVICE_G1K(0x1f45, 0x0001)},   /* Unknown Gobi QDL device */
  76        {DEVICE_G1K(0x1bc7, 0x900e)},   /* Telit Gobi QDL device */
  77
  78        /* Gobi 2000 devices */
  79        {USB_DEVICE(0x1410, 0xa010)},   /* Novatel Gobi 2000 QDL device */
  80        {USB_DEVICE(0x1410, 0xa011)},   /* Novatel Gobi 2000 QDL device */
  81        {USB_DEVICE(0x1410, 0xa012)},   /* Novatel Gobi 2000 QDL device */
  82        {USB_DEVICE(0x1410, 0xa013)},   /* Novatel Gobi 2000 QDL device */
  83        {USB_DEVICE(0x1410, 0xa014)},   /* Novatel Gobi 2000 QDL device */
  84        {USB_DEVICE(0x413c, 0x8185)},   /* Dell Gobi 2000 QDL device (N0218, VU936) */
  85        {USB_DEVICE(0x413c, 0x8186)},   /* Dell Gobi 2000 Modem device (N0218, VU936) */
  86        {USB_DEVICE(0x05c6, 0x9208)},   /* Generic Gobi 2000 QDL device */
  87        {USB_DEVICE(0x05c6, 0x920b)},   /* Generic Gobi 2000 Modem device */
  88        {USB_DEVICE(0x05c6, 0x9224)},   /* Sony Gobi 2000 QDL device (N0279, VU730) */
  89        {USB_DEVICE(0x05c6, 0x9225)},   /* Sony Gobi 2000 Modem device (N0279, VU730) */
  90        {USB_DEVICE(0x05c6, 0x9244)},   /* Samsung Gobi 2000 QDL device (VL176) */
  91        {USB_DEVICE(0x05c6, 0x9245)},   /* Samsung Gobi 2000 Modem device (VL176) */
  92        {USB_DEVICE(0x03f0, 0x241d)},   /* HP Gobi 2000 QDL device (VP412) */
  93        {USB_DEVICE(0x03f0, 0x251d)},   /* HP Gobi 2000 Modem device (VP412) */
  94        {USB_DEVICE(0x05c6, 0x9214)},   /* Acer Gobi 2000 QDL device (VP413) */
  95        {USB_DEVICE(0x05c6, 0x9215)},   /* Acer Gobi 2000 Modem device (VP413) */
  96        {USB_DEVICE(0x05c6, 0x9264)},   /* Asus Gobi 2000 QDL device (VR305) */
  97        {USB_DEVICE(0x05c6, 0x9265)},   /* Asus Gobi 2000 Modem device (VR305) */
  98        {USB_DEVICE(0x05c6, 0x9234)},   /* Top Global Gobi 2000 QDL device (VR306) */
  99        {USB_DEVICE(0x05c6, 0x9235)},   /* Top Global Gobi 2000 Modem device (VR306) */
 100        {USB_DEVICE(0x05c6, 0x9274)},   /* iRex Technologies Gobi 2000 QDL device (VR307) */
 101        {USB_DEVICE(0x05c6, 0x9275)},   /* iRex Technologies Gobi 2000 Modem device (VR307) */
 102        {USB_DEVICE(0x1199, 0x9000)},   /* Sierra Wireless Gobi 2000 QDL device (VT773) */
 103        {USB_DEVICE(0x1199, 0x9001)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 104        {USB_DEVICE(0x1199, 0x9002)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 105        {USB_DEVICE(0x1199, 0x9003)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 106        {USB_DEVICE(0x1199, 0x9004)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 107        {USB_DEVICE(0x1199, 0x9005)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 108        {USB_DEVICE(0x1199, 0x9006)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 109        {USB_DEVICE(0x1199, 0x9007)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 110        {USB_DEVICE(0x1199, 0x9008)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 111        {USB_DEVICE(0x1199, 0x9009)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 112        {USB_DEVICE(0x1199, 0x900a)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 113        {USB_DEVICE(0x1199, 0x9011)},   /* Sierra Wireless Gobi 2000 Modem device (MC8305) */
 114        {USB_DEVICE(0x16d8, 0x8001)},   /* CMDTech Gobi 2000 QDL device (VU922) */
 115        {USB_DEVICE(0x16d8, 0x8002)},   /* CMDTech Gobi 2000 Modem device (VU922) */
 116        {USB_DEVICE(0x05c6, 0x9204)},   /* Gobi 2000 QDL device */
 117        {USB_DEVICE(0x05c6, 0x9205)},   /* Gobi 2000 Modem device */
 118
 119        /* Gobi 3000 devices */
 120        {USB_DEVICE(0x03f0, 0x371d)},   /* HP un2430 Gobi 3000 QDL */
 121        {USB_DEVICE(0x05c6, 0x920c)},   /* Gobi 3000 QDL */
 122        {USB_DEVICE(0x05c6, 0x920d)},   /* Gobi 3000 Composite */
 123        {USB_DEVICE(0x1410, 0xa020)},   /* Novatel Gobi 3000 QDL */
 124        {USB_DEVICE(0x1410, 0xa021)},   /* Novatel Gobi 3000 Composite */
 125        {USB_DEVICE(0x413c, 0x8193)},   /* Dell Gobi 3000 QDL */
 126        {USB_DEVICE(0x413c, 0x8194)},   /* Dell Gobi 3000 Composite */
 127        {USB_DEVICE(0x413c, 0x81a6)},   /* Dell DW5570 QDL (MC8805) */
 128        {USB_DEVICE(0x1199, 0x68a4)},   /* Sierra Wireless QDL */
 129        {USB_DEVICE(0x1199, 0x68a5)},   /* Sierra Wireless Modem */
 130        {USB_DEVICE(0x1199, 0x68a8)},   /* Sierra Wireless QDL */
 131        {USB_DEVICE(0x1199, 0x68a9)},   /* Sierra Wireless Modem */
 132        {USB_DEVICE(0x1199, 0x9010)},   /* Sierra Wireless Gobi 3000 QDL */
 133        {USB_DEVICE(0x1199, 0x9012)},   /* Sierra Wireless Gobi 3000 QDL */
 134        {USB_DEVICE(0x1199, 0x9013)},   /* Sierra Wireless Gobi 3000 Modem device (MC8355) */
 135        {USB_DEVICE(0x1199, 0x9014)},   /* Sierra Wireless Gobi 3000 QDL */
 136        {USB_DEVICE(0x1199, 0x9015)},   /* Sierra Wireless Gobi 3000 Modem device */
 137        {USB_DEVICE(0x1199, 0x9018)},   /* Sierra Wireless Gobi 3000 QDL */
 138        {USB_DEVICE(0x1199, 0x9019)},   /* Sierra Wireless Gobi 3000 Modem device */
 139        {USB_DEVICE(0x1199, 0x901b)},   /* Sierra Wireless MC7770 */
 140        {USB_DEVICE(0x12D1, 0x14F0)},   /* Sony Gobi 3000 QDL */
 141        {USB_DEVICE(0x12D1, 0x14F1)},   /* Sony Gobi 3000 Composite */
 142        {USB_DEVICE(0x0AF0, 0x8120)},   /* Option GTM681W */
 143
 144        /* non-Gobi Sierra Wireless devices */
 145        {DEVICE_SWI(0x03f0, 0x4e1d)},   /* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */
 146        {DEVICE_SWI(0x0f3d, 0x68a2)},   /* Sierra Wireless MC7700 */
 147        {DEVICE_SWI(0x114f, 0x68a2)},   /* Sierra Wireless MC7750 */
 148        {DEVICE_SWI(0x1199, 0x68a2)},   /* Sierra Wireless MC7710 */
 149        {DEVICE_SWI(0x1199, 0x68c0)},   /* Sierra Wireless MC7304/MC7354 */
 150        {DEVICE_SWI(0x1199, 0x901c)},   /* Sierra Wireless EM7700 */
 151        {DEVICE_SWI(0x1199, 0x901f)},   /* Sierra Wireless EM7355 */
 152        {DEVICE_SWI(0x1199, 0x9040)},   /* Sierra Wireless Modem */
 153        {DEVICE_SWI(0x1199, 0x9041)},   /* Sierra Wireless MC7305/MC7355 */
 154        {DEVICE_SWI(0x1199, 0x9051)},   /* Netgear AirCard 340U */
 155        {DEVICE_SWI(0x1199, 0x9053)},   /* Sierra Wireless Modem */
 156        {DEVICE_SWI(0x1199, 0x9054)},   /* Sierra Wireless Modem */
 157        {DEVICE_SWI(0x1199, 0x9055)},   /* Netgear AirCard 341U */
 158        {DEVICE_SWI(0x1199, 0x9056)},   /* Sierra Wireless Modem */
 159        {DEVICE_SWI(0x1199, 0x9060)},   /* Sierra Wireless Modem */
 160        {DEVICE_SWI(0x1199, 0x9061)},   /* Sierra Wireless Modem */
 161        {DEVICE_SWI(0x1199, 0x9070)},   /* Sierra Wireless MC74xx */
 162        {DEVICE_SWI(0x1199, 0x9071)},   /* Sierra Wireless MC74xx */
 163        {DEVICE_SWI(0x1199, 0x9078)},   /* Sierra Wireless EM74xx */
 164        {DEVICE_SWI(0x1199, 0x9079)},   /* Sierra Wireless EM74xx */
 165        {DEVICE_SWI(0x1199, 0x907a)},   /* Sierra Wireless EM74xx QDL */
 166        {DEVICE_SWI(0x1199, 0x907b)},   /* Sierra Wireless EM74xx */
 167        {DEVICE_SWI(0x413c, 0x81a2)},   /* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
 168        {DEVICE_SWI(0x413c, 0x81a3)},   /* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
 169        {DEVICE_SWI(0x413c, 0x81a4)},   /* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
 170        {DEVICE_SWI(0x413c, 0x81a8)},   /* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
 171        {DEVICE_SWI(0x413c, 0x81a9)},   /* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
 172        {DEVICE_SWI(0x413c, 0x81b1)},   /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card */
 173        {DEVICE_SWI(0x413c, 0x81b3)},   /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card (rev3) */
 174        {DEVICE_SWI(0x413c, 0x81b5)},   /* Dell Wireless 5811e QDL */
 175        {DEVICE_SWI(0x413c, 0x81b6)},   /* Dell Wireless 5811e QDL */
 176
 177        /* Huawei devices */
 178        {DEVICE_HWI(0x03f0, 0x581d)},   /* HP lt4112 LTE/HSPA+ Gobi 4G Modem (Huawei me906e) */
 179
 180        { }                             /* Terminating entry */
 181};
 182MODULE_DEVICE_TABLE(usb, id_table);
 183
 184static int handle_quectel_ec20(struct device *dev, int ifnum)
 185{
 186        int altsetting = 0;
 187
 188        /*
 189         * Quectel EC20 Mini PCIe LTE module layout:
 190         * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 191         * 1: NMEA
 192         * 2: AT-capable modem port
 193         * 3: Modem interface
 194         * 4: NDIS
 195         */
 196        switch (ifnum) {
 197        case 0:
 198                dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
 199                break;
 200        case 1:
 201                dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
 202                break;
 203        case 2:
 204        case 3:
 205                dev_dbg(dev, "Quectel EC20 Modem port found\n");
 206                break;
 207        case 4:
 208                /* Don't claim the QMI/net interface */
 209                altsetting = -1;
 210                break;
 211        }
 212
 213        return altsetting;
 214}
 215
 216static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 217{
 218        struct usb_host_interface *intf = serial->interface->cur_altsetting;
 219        struct device *dev = &serial->dev->dev;
 220        int retval = -ENODEV;
 221        __u8 nintf;
 222        __u8 ifnum;
 223        int altsetting = -1;
 224        bool sendsetup = false;
 225
 226        /* we only support vendor specific functions */
 227        if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
 228                goto done;
 229
 230        nintf = serial->dev->actconfig->desc.bNumInterfaces;
 231        dev_dbg(dev, "Num Interfaces = %d\n", nintf);
 232        ifnum = intf->desc.bInterfaceNumber;
 233        dev_dbg(dev, "This Interface = %d\n", ifnum);
 234
 235        if (nintf == 1) {
 236                /* QDL mode */
 237                /* Gobi 2000 has a single altsetting, older ones have two */
 238                if (serial->interface->num_altsetting == 2)
 239                        intf = &serial->interface->altsetting[1];
 240                else if (serial->interface->num_altsetting > 2)
 241                        goto done;
 242
 243                if (intf->desc.bNumEndpoints == 2 &&
 244                    usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
 245                    usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
 246                        dev_dbg(dev, "QDL port found\n");
 247
 248                        if (serial->interface->num_altsetting == 1)
 249                                retval = 0; /* Success */
 250                        else
 251                                altsetting = 1;
 252                }
 253                goto done;
 254
 255        }
 256
 257        /* default to enabling interface */
 258        altsetting = 0;
 259
 260        /*
 261         * Composite mode; don't bind to the QMI/net interface as that
 262         * gets handled by other drivers.
 263         */
 264
 265        switch (id->driver_info) {
 266        case QCSERIAL_G1K:
 267                /*
 268                 * Gobi 1K USB layout:
 269                 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 270                 * 1: serial port (doesn't respond)
 271                 * 2: AT-capable modem port
 272                 * 3: QMI/net
 273                 */
 274                if (nintf < 3 || nintf > 4) {
 275                        dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 276                        altsetting = -1;
 277                        goto done;
 278                }
 279
 280                if (ifnum == 0) {
 281                        dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
 282                        altsetting = 1;
 283                } else if (ifnum == 2)
 284                        dev_dbg(dev, "Modem port found\n");
 285                else
 286                        altsetting = -1;
 287                break;
 288        case QCSERIAL_G2K:
 289                /* handle non-standard layouts */
 290                if (nintf == 5 && id->idProduct == QUECTEL_EC20_PID) {
 291                        altsetting = handle_quectel_ec20(dev, ifnum);
 292                        goto done;
 293                }
 294
 295                /*
 296                 * Gobi 2K+ USB layout:
 297                 * 0: QMI/net
 298                 * 1: DM/DIAG (use libqcdm from ModemManager for communication)
 299                 * 2: AT-capable modem port
 300                 * 3: NMEA
 301                 */
 302                if (nintf < 3 || nintf > 4) {
 303                        dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 304                        altsetting = -1;
 305                        goto done;
 306                }
 307
 308                switch (ifnum) {
 309                case 0:
 310                        /* Don't claim the QMI/net interface */
 311                        altsetting = -1;
 312                        break;
 313                case 1:
 314                        dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n");
 315                        break;
 316                case 2:
 317                        dev_dbg(dev, "Modem port found\n");
 318                        break;
 319                case 3:
 320                        /*
 321                         * NMEA (serial line 9600 8N1)
 322                         * # echo "\$GPS_START" > /dev/ttyUSBx
 323                         * # echo "\$GPS_STOP"  > /dev/ttyUSBx
 324                         */
 325                        dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
 326                        break;
 327                }
 328                break;
 329        case QCSERIAL_SWI:
 330                /*
 331                 * Sierra Wireless layout:
 332                 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 333                 * 2: NMEA
 334                 * 3: AT-capable modem port
 335                 * 8: QMI/net
 336                 */
 337                switch (ifnum) {
 338                case 0:
 339                        dev_dbg(dev, "DM/DIAG interface found\n");
 340                        break;
 341                case 2:
 342                        dev_dbg(dev, "NMEA GPS interface found\n");
 343                        break;
 344                case 3:
 345                        dev_dbg(dev, "Modem port found\n");
 346                        sendsetup = true;
 347                        break;
 348                default:
 349                        /* don't claim any unsupported interface */
 350                        altsetting = -1;
 351                        break;
 352                }
 353                break;
 354        case QCSERIAL_HWI:
 355                /*
 356                 * Huawei devices map functions by subclass + protocol
 357                 * instead of interface numbers. The protocol identify
 358                 * a specific function, while the subclass indicate a
 359                 * specific firmware source
 360                 *
 361                 * This is a blacklist of functions known to be
 362                 * non-serial.  The rest are assumed to be serial and
 363                 * will be handled by this driver
 364                 */
 365                switch (intf->desc.bInterfaceProtocol) {
 366                        /* QMI combined (qmi_wwan) */
 367                case 0x07:
 368                case 0x37:
 369                case 0x67:
 370                        /* QMI data (qmi_wwan) */
 371                case 0x08:
 372                case 0x38:
 373                case 0x68:
 374                        /* QMI control (qmi_wwan) */
 375                case 0x09:
 376                case 0x39:
 377                case 0x69:
 378                        /* NCM like (huawei_cdc_ncm) */
 379                case 0x16:
 380                case 0x46:
 381                case 0x76:
 382                        altsetting = -1;
 383                        break;
 384                default:
 385                        dev_dbg(dev, "Huawei type serial port found (%02x/%02x/%02x)\n",
 386                                intf->desc.bInterfaceClass,
 387                                intf->desc.bInterfaceSubClass,
 388                                intf->desc.bInterfaceProtocol);
 389                }
 390                break;
 391        default:
 392                dev_err(dev, "unsupported device layout type: %lu\n",
 393                        id->driver_info);
 394                break;
 395        }
 396
 397done:
 398        if (altsetting >= 0) {
 399                retval = usb_set_interface(serial->dev, ifnum, altsetting);
 400                if (retval < 0) {
 401                        dev_err(dev,
 402                                "Could not set interface, error %d\n",
 403                                retval);
 404                        retval = -ENODEV;
 405                }
 406        }
 407
 408        if (!retval)
 409                usb_set_serial_data(serial, (void *)(unsigned long)sendsetup);
 410
 411        return retval;
 412}
 413
 414static int qc_attach(struct usb_serial *serial)
 415{
 416        struct usb_wwan_intf_private *data;
 417        bool sendsetup;
 418
 419        data = kzalloc(sizeof(*data), GFP_KERNEL);
 420        if (!data)
 421                return -ENOMEM;
 422
 423        sendsetup = !!(unsigned long)(usb_get_serial_data(serial));
 424        if (sendsetup)
 425                data->use_send_setup = 1;
 426
 427        spin_lock_init(&data->susp_lock);
 428
 429        usb_set_serial_data(serial, data);
 430
 431        return 0;
 432}
 433
 434static void qc_release(struct usb_serial *serial)
 435{
 436        struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);
 437
 438        usb_set_serial_data(serial, NULL);
 439        kfree(priv);
 440}
 441
 442static struct usb_serial_driver qcdevice = {
 443        .driver = {
 444                .owner     = THIS_MODULE,
 445                .name      = "qcserial",
 446        },
 447        .description         = "Qualcomm USB modem",
 448        .id_table            = id_table,
 449        .num_ports           = 1,
 450        .probe               = qcprobe,
 451        .open                = usb_wwan_open,
 452        .close               = usb_wwan_close,
 453        .dtr_rts             = usb_wwan_dtr_rts,
 454        .write               = usb_wwan_write,
 455        .write_room          = usb_wwan_write_room,
 456        .chars_in_buffer     = usb_wwan_chars_in_buffer,
 457        .attach              = qc_attach,
 458        .release             = qc_release,
 459        .port_probe          = usb_wwan_port_probe,
 460        .port_remove         = usb_wwan_port_remove,
 461#ifdef CONFIG_PM
 462        .suspend             = usb_wwan_suspend,
 463        .resume              = usb_wwan_resume,
 464#endif
 465};
 466
 467static struct usb_serial_driver * const serial_drivers[] = {
 468        &qcdevice, NULL
 469};
 470
 471module_usb_serial_driver(serial_drivers, id_table);
 472
 473MODULE_AUTHOR(DRIVER_AUTHOR);
 474MODULE_DESCRIPTION(DRIVER_DESC);
 475MODULE_LICENSE("GPL v2");
 476