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(0x413c, 0x81a2)},   /* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
 166        {DEVICE_SWI(0x413c, 0x81a3)},   /* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
 167        {DEVICE_SWI(0x413c, 0x81a4)},   /* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
 168        {DEVICE_SWI(0x413c, 0x81a8)},   /* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
 169        {DEVICE_SWI(0x413c, 0x81a9)},   /* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
 170        {DEVICE_SWI(0x413c, 0x81b1)},   /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card */
 171        {DEVICE_SWI(0x413c, 0x81b3)},   /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card (rev3) */
 172        {DEVICE_SWI(0x413c, 0x81b5)},   /* Dell Wireless 5811e QDL */
 173        {DEVICE_SWI(0x413c, 0x81b6)},   /* Dell Wireless 5811e QDL */
 174
 175        /* Huawei devices */
 176        {DEVICE_HWI(0x03f0, 0x581d)},   /* HP lt4112 LTE/HSPA+ Gobi 4G Modem (Huawei me906e) */
 177
 178        { }                             /* Terminating entry */
 179};
 180MODULE_DEVICE_TABLE(usb, id_table);
 181
 182static int handle_quectel_ec20(struct device *dev, int ifnum)
 183{
 184        int altsetting = 0;
 185
 186        /*
 187         * Quectel EC20 Mini PCIe LTE module layout:
 188         * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 189         * 1: NMEA
 190         * 2: AT-capable modem port
 191         * 3: Modem interface
 192         * 4: NDIS
 193         */
 194        switch (ifnum) {
 195        case 0:
 196                dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
 197                break;
 198        case 1:
 199                dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
 200                break;
 201        case 2:
 202        case 3:
 203                dev_dbg(dev, "Quectel EC20 Modem port found\n");
 204                break;
 205        case 4:
 206                /* Don't claim the QMI/net interface */
 207                altsetting = -1;
 208                break;
 209        }
 210
 211        return altsetting;
 212}
 213
 214static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 215{
 216        struct usb_host_interface *intf = serial->interface->cur_altsetting;
 217        struct device *dev = &serial->dev->dev;
 218        int retval = -ENODEV;
 219        __u8 nintf;
 220        __u8 ifnum;
 221        int altsetting = -1;
 222        bool sendsetup = false;
 223
 224        /* we only support vendor specific functions */
 225        if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
 226                goto done;
 227
 228        nintf = serial->dev->actconfig->desc.bNumInterfaces;
 229        dev_dbg(dev, "Num Interfaces = %d\n", nintf);
 230        ifnum = intf->desc.bInterfaceNumber;
 231        dev_dbg(dev, "This Interface = %d\n", ifnum);
 232
 233        if (nintf == 1) {
 234                /* QDL mode */
 235                /* Gobi 2000 has a single altsetting, older ones have two */
 236                if (serial->interface->num_altsetting == 2)
 237                        intf = &serial->interface->altsetting[1];
 238                else if (serial->interface->num_altsetting > 2)
 239                        goto done;
 240
 241                if (intf->desc.bNumEndpoints == 2 &&
 242                    usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
 243                    usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
 244                        dev_dbg(dev, "QDL port found\n");
 245
 246                        if (serial->interface->num_altsetting == 1)
 247                                retval = 0; /* Success */
 248                        else
 249                                altsetting = 1;
 250                }
 251                goto done;
 252
 253        }
 254
 255        /* default to enabling interface */
 256        altsetting = 0;
 257
 258        /*
 259         * Composite mode; don't bind to the QMI/net interface as that
 260         * gets handled by other drivers.
 261         */
 262
 263        switch (id->driver_info) {
 264        case QCSERIAL_G1K:
 265                /*
 266                 * Gobi 1K USB layout:
 267                 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 268                 * 1: serial port (doesn't respond)
 269                 * 2: AT-capable modem port
 270                 * 3: QMI/net
 271                 */
 272                if (nintf < 3 || nintf > 4) {
 273                        dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 274                        altsetting = -1;
 275                        goto done;
 276                }
 277
 278                if (ifnum == 0) {
 279                        dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
 280                        altsetting = 1;
 281                } else if (ifnum == 2)
 282                        dev_dbg(dev, "Modem port found\n");
 283                else
 284                        altsetting = -1;
 285                break;
 286        case QCSERIAL_G2K:
 287                /* handle non-standard layouts */
 288                if (nintf == 5 && id->idProduct == QUECTEL_EC20_PID) {
 289                        altsetting = handle_quectel_ec20(dev, ifnum);
 290                        goto done;
 291                }
 292
 293                /*
 294                 * Gobi 2K+ USB layout:
 295                 * 0: QMI/net
 296                 * 1: DM/DIAG (use libqcdm from ModemManager for communication)
 297                 * 2: AT-capable modem port
 298                 * 3: NMEA
 299                 */
 300                if (nintf < 3 || nintf > 4) {
 301                        dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 302                        altsetting = -1;
 303                        goto done;
 304                }
 305
 306                switch (ifnum) {
 307                case 0:
 308                        /* Don't claim the QMI/net interface */
 309                        altsetting = -1;
 310                        break;
 311                case 1:
 312                        dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n");
 313                        break;
 314                case 2:
 315                        dev_dbg(dev, "Modem port found\n");
 316                        break;
 317                case 3:
 318                        /*
 319                         * NMEA (serial line 9600 8N1)
 320                         * # echo "\$GPS_START" > /dev/ttyUSBx
 321                         * # echo "\$GPS_STOP"  > /dev/ttyUSBx
 322                         */
 323                        dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
 324                        break;
 325                }
 326                break;
 327        case QCSERIAL_SWI:
 328                /*
 329                 * Sierra Wireless layout:
 330                 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 331                 * 2: NMEA
 332                 * 3: AT-capable modem port
 333                 * 8: QMI/net
 334                 */
 335                switch (ifnum) {
 336                case 0:
 337                        dev_dbg(dev, "DM/DIAG interface found\n");
 338                        break;
 339                case 2:
 340                        dev_dbg(dev, "NMEA GPS interface found\n");
 341                        break;
 342                case 3:
 343                        dev_dbg(dev, "Modem port found\n");
 344                        sendsetup = true;
 345                        break;
 346                default:
 347                        /* don't claim any unsupported interface */
 348                        altsetting = -1;
 349                        break;
 350                }
 351                break;
 352        case QCSERIAL_HWI:
 353                /*
 354                 * Huawei devices map functions by subclass + protocol
 355                 * instead of interface numbers. The protocol identify
 356                 * a specific function, while the subclass indicate a
 357                 * specific firmware source
 358                 *
 359                 * This is a blacklist of functions known to be
 360                 * non-serial.  The rest are assumed to be serial and
 361                 * will be handled by this driver
 362                 */
 363                switch (intf->desc.bInterfaceProtocol) {
 364                        /* QMI combined (qmi_wwan) */
 365                case 0x07:
 366                case 0x37:
 367                case 0x67:
 368                        /* QMI data (qmi_wwan) */
 369                case 0x08:
 370                case 0x38:
 371                case 0x68:
 372                        /* QMI control (qmi_wwan) */
 373                case 0x09:
 374                case 0x39:
 375                case 0x69:
 376                        /* NCM like (huawei_cdc_ncm) */
 377                case 0x16:
 378                case 0x46:
 379                case 0x76:
 380                        altsetting = -1;
 381                        break;
 382                default:
 383                        dev_dbg(dev, "Huawei type serial port found (%02x/%02x/%02x)\n",
 384                                intf->desc.bInterfaceClass,
 385                                intf->desc.bInterfaceSubClass,
 386                                intf->desc.bInterfaceProtocol);
 387                }
 388                break;
 389        default:
 390                dev_err(dev, "unsupported device layout type: %lu\n",
 391                        id->driver_info);
 392                break;
 393        }
 394
 395done:
 396        if (altsetting >= 0) {
 397                retval = usb_set_interface(serial->dev, ifnum, altsetting);
 398                if (retval < 0) {
 399                        dev_err(dev,
 400                                "Could not set interface, error %d\n",
 401                                retval);
 402                        retval = -ENODEV;
 403                }
 404        }
 405
 406        if (!retval)
 407                usb_set_serial_data(serial, (void *)(unsigned long)sendsetup);
 408
 409        return retval;
 410}
 411
 412static int qc_attach(struct usb_serial *serial)
 413{
 414        struct usb_wwan_intf_private *data;
 415        bool sendsetup;
 416
 417        data = kzalloc(sizeof(*data), GFP_KERNEL);
 418        if (!data)
 419                return -ENOMEM;
 420
 421        sendsetup = !!(unsigned long)(usb_get_serial_data(serial));
 422        if (sendsetup)
 423                data->use_send_setup = 1;
 424
 425        spin_lock_init(&data->susp_lock);
 426
 427        usb_set_serial_data(serial, data);
 428
 429        return 0;
 430}
 431
 432static void qc_release(struct usb_serial *serial)
 433{
 434        struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);
 435
 436        usb_set_serial_data(serial, NULL);
 437        kfree(priv);
 438}
 439
 440static struct usb_serial_driver qcdevice = {
 441        .driver = {
 442                .owner     = THIS_MODULE,
 443                .name      = "qcserial",
 444        },
 445        .description         = "Qualcomm USB modem",
 446        .id_table            = id_table,
 447        .num_ports           = 1,
 448        .probe               = qcprobe,
 449        .open                = usb_wwan_open,
 450        .close               = usb_wwan_close,
 451        .dtr_rts             = usb_wwan_dtr_rts,
 452        .write               = usb_wwan_write,
 453        .write_room          = usb_wwan_write_room,
 454        .chars_in_buffer     = usb_wwan_chars_in_buffer,
 455        .attach              = qc_attach,
 456        .release             = qc_release,
 457        .port_probe          = usb_wwan_port_probe,
 458        .port_remove         = usb_wwan_port_remove,
 459#ifdef CONFIG_PM
 460        .suspend             = usb_wwan_suspend,
 461        .resume              = usb_wwan_resume,
 462#endif
 463};
 464
 465static struct usb_serial_driver * const serial_drivers[] = {
 466        &qcdevice, NULL
 467};
 468
 469module_usb_serial_driver(serial_drivers, id_table);
 470
 471MODULE_AUTHOR(DRIVER_AUTHOR);
 472MODULE_DESCRIPTION(DRIVER_DESC);
 473MODULE_LICENSE("GPL v2");
 474