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

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Qualcomm Serial USB driver
   4 *
   5 *      Copyright (c) 2008 QUALCOMM Incorporated.
   6 *      Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
   7 *      Copyright (c) 2009 Novell Inc.
   8 */
   9
  10#include <linux/tty.h>
  11#include <linux/tty_flip.h>
  12#include <linux/module.h>
  13#include <linux/usb.h>
  14#include <linux/usb/serial.h>
  15#include <linux/slab.h>
  16#include "usb-wwan.h"
  17
  18#define DRIVER_AUTHOR "Qualcomm Inc"
  19#define DRIVER_DESC "Qualcomm USB Serial driver"
  20
  21#define QUECTEL_EC20_PID        0x9215
  22
  23/* standard device layouts supported by this driver */
  24enum qcserial_layouts {
  25        QCSERIAL_G2K = 0,       /* Gobi 2000 */
  26        QCSERIAL_G1K = 1,       /* Gobi 1000 */
  27        QCSERIAL_SWI = 2,       /* Sierra Wireless */
  28        QCSERIAL_HWI = 3,       /* Huawei */
  29};
  30
  31#define DEVICE_G1K(v, p) \
  32        USB_DEVICE(v, p), .driver_info = QCSERIAL_G1K
  33#define DEVICE_SWI(v, p) \
  34        USB_DEVICE(v, p), .driver_info = QCSERIAL_SWI
  35#define DEVICE_HWI(v, p) \
  36        USB_DEVICE(v, p), .driver_info = QCSERIAL_HWI
  37
  38static const struct usb_device_id id_table[] = {
  39        /* Gobi 1000 devices */
  40        {DEVICE_G1K(0x05c6, 0x9211)},   /* Acer Gobi QDL device */
  41        {DEVICE_G1K(0x05c6, 0x9212)},   /* Acer Gobi Modem Device */
  42        {DEVICE_G1K(0x03f0, 0x1f1d)},   /* HP un2400 Gobi Modem Device */
  43        {DEVICE_G1K(0x03f0, 0x201d)},   /* HP un2400 Gobi QDL Device */
  44        {DEVICE_G1K(0x04da, 0x250d)},   /* Panasonic Gobi Modem device */
  45        {DEVICE_G1K(0x04da, 0x250c)},   /* Panasonic Gobi QDL device */
  46        {DEVICE_G1K(0x413c, 0x8172)},   /* Dell Gobi Modem device */
  47        {DEVICE_G1K(0x413c, 0x8171)},   /* Dell Gobi QDL device */
  48        {DEVICE_G1K(0x1410, 0xa001)},   /* Novatel/Verizon USB-1000 */
  49        {DEVICE_G1K(0x1410, 0xa002)},   /* Novatel Gobi Modem device */
  50        {DEVICE_G1K(0x1410, 0xa003)},   /* Novatel Gobi Modem device */
  51        {DEVICE_G1K(0x1410, 0xa004)},   /* Novatel Gobi Modem device */
  52        {DEVICE_G1K(0x1410, 0xa005)},   /* Novatel Gobi Modem device */
  53        {DEVICE_G1K(0x1410, 0xa006)},   /* Novatel Gobi Modem device */
  54        {DEVICE_G1K(0x1410, 0xa007)},   /* Novatel Gobi Modem device */
  55        {DEVICE_G1K(0x1410, 0xa008)},   /* Novatel Gobi QDL device */
  56        {DEVICE_G1K(0x0b05, 0x1776)},   /* Asus Gobi Modem device */
  57        {DEVICE_G1K(0x0b05, 0x1774)},   /* Asus Gobi QDL device */
  58        {DEVICE_G1K(0x19d2, 0xfff3)},   /* ONDA Gobi Modem device */
  59        {DEVICE_G1K(0x19d2, 0xfff2)},   /* ONDA Gobi QDL device */
  60        {DEVICE_G1K(0x1557, 0x0a80)},   /* OQO Gobi QDL device */
  61        {DEVICE_G1K(0x05c6, 0x9001)},   /* Generic Gobi Modem device */
  62        {DEVICE_G1K(0x05c6, 0x9002)},   /* Generic Gobi Modem device */
  63        {DEVICE_G1K(0x05c6, 0x9202)},   /* Generic Gobi Modem device */
  64        {DEVICE_G1K(0x05c6, 0x9203)},   /* Generic Gobi Modem device */
  65        {DEVICE_G1K(0x05c6, 0x9222)},   /* Generic Gobi Modem device */
  66        {DEVICE_G1K(0x05c6, 0x9008)},   /* Generic Gobi QDL device */
  67        {DEVICE_G1K(0x05c6, 0x9009)},   /* Generic Gobi Modem device */
  68        {DEVICE_G1K(0x05c6, 0x9201)},   /* Generic Gobi QDL device */
  69        {DEVICE_G1K(0x05c6, 0x9221)},   /* Generic Gobi QDL device */
  70        {DEVICE_G1K(0x05c6, 0x9231)},   /* Generic Gobi QDL device */
  71        {DEVICE_G1K(0x1f45, 0x0001)},   /* Unknown Gobi QDL device */
  72        {DEVICE_G1K(0x1bc7, 0x900e)},   /* Telit Gobi QDL device */
  73
  74        /* Gobi 2000 devices */
  75        {USB_DEVICE(0x1410, 0xa010)},   /* Novatel Gobi 2000 QDL device */
  76        {USB_DEVICE(0x1410, 0xa011)},   /* Novatel Gobi 2000 QDL device */
  77        {USB_DEVICE(0x1410, 0xa012)},   /* Novatel Gobi 2000 QDL device */
  78        {USB_DEVICE(0x1410, 0xa013)},   /* Novatel Gobi 2000 QDL device */
  79        {USB_DEVICE(0x1410, 0xa014)},   /* Novatel Gobi 2000 QDL device */
  80        {USB_DEVICE(0x413c, 0x8185)},   /* Dell Gobi 2000 QDL device (N0218, VU936) */
  81        {USB_DEVICE(0x413c, 0x8186)},   /* Dell Gobi 2000 Modem device (N0218, VU936) */
  82        {USB_DEVICE(0x05c6, 0x9208)},   /* Generic Gobi 2000 QDL device */
  83        {USB_DEVICE(0x05c6, 0x920b)},   /* Generic Gobi 2000 Modem device */
  84        {USB_DEVICE(0x05c6, 0x9224)},   /* Sony Gobi 2000 QDL device (N0279, VU730) */
  85        {USB_DEVICE(0x05c6, 0x9225)},   /* Sony Gobi 2000 Modem device (N0279, VU730) */
  86        {USB_DEVICE(0x05c6, 0x9244)},   /* Samsung Gobi 2000 QDL device (VL176) */
  87        {USB_DEVICE(0x05c6, 0x9245)},   /* Samsung Gobi 2000 Modem device (VL176) */
  88        {USB_DEVICE(0x03f0, 0x241d)},   /* HP Gobi 2000 QDL device (VP412) */
  89        {USB_DEVICE(0x03f0, 0x251d)},   /* HP Gobi 2000 Modem device (VP412) */
  90        {USB_DEVICE(0x05c6, 0x9214)},   /* Acer Gobi 2000 QDL device (VP413) */
  91        {USB_DEVICE(0x05c6, 0x9215)},   /* Acer Gobi 2000 Modem device (VP413) */
  92        {USB_DEVICE(0x05c6, 0x9264)},   /* Asus Gobi 2000 QDL device (VR305) */
  93        {USB_DEVICE(0x05c6, 0x9265)},   /* Asus Gobi 2000 Modem device (VR305) */
  94        {USB_DEVICE(0x05c6, 0x9234)},   /* Top Global Gobi 2000 QDL device (VR306) */
  95        {USB_DEVICE(0x05c6, 0x9235)},   /* Top Global Gobi 2000 Modem device (VR306) */
  96        {USB_DEVICE(0x05c6, 0x9274)},   /* iRex Technologies Gobi 2000 QDL device (VR307) */
  97        {USB_DEVICE(0x05c6, 0x9275)},   /* iRex Technologies Gobi 2000 Modem device (VR307) */
  98        {USB_DEVICE(0x1199, 0x9000)},   /* Sierra Wireless Gobi 2000 QDL device (VT773) */
  99        {USB_DEVICE(0x1199, 0x9001)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 100        {USB_DEVICE(0x1199, 0x9002)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 101        {USB_DEVICE(0x1199, 0x9003)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 102        {USB_DEVICE(0x1199, 0x9004)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 103        {USB_DEVICE(0x1199, 0x9005)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 104        {USB_DEVICE(0x1199, 0x9006)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 105        {USB_DEVICE(0x1199, 0x9007)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 106        {USB_DEVICE(0x1199, 0x9008)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 107        {USB_DEVICE(0x1199, 0x9009)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 108        {USB_DEVICE(0x1199, 0x900a)},   /* Sierra Wireless Gobi 2000 Modem device (VT773) */
 109        {USB_DEVICE(0x1199, 0x9011)},   /* Sierra Wireless Gobi 2000 Modem device (MC8305) */
 110        {USB_DEVICE(0x16d8, 0x8001)},   /* CMDTech Gobi 2000 QDL device (VU922) */
 111        {USB_DEVICE(0x16d8, 0x8002)},   /* CMDTech Gobi 2000 Modem device (VU922) */
 112        {USB_DEVICE(0x05c6, 0x9204)},   /* Gobi 2000 QDL device */
 113        {USB_DEVICE(0x05c6, 0x9205)},   /* Gobi 2000 Modem device */
 114
 115        /* Gobi 3000 devices */
 116        {USB_DEVICE(0x03f0, 0x371d)},   /* HP un2430 Gobi 3000 QDL */
 117        {USB_DEVICE(0x05c6, 0x920c)},   /* Gobi 3000 QDL */
 118        {USB_DEVICE(0x05c6, 0x920d)},   /* Gobi 3000 Composite */
 119        {USB_DEVICE(0x1410, 0xa020)},   /* Novatel Gobi 3000 QDL */
 120        {USB_DEVICE(0x1410, 0xa021)},   /* Novatel Gobi 3000 Composite */
 121        {USB_DEVICE(0x413c, 0x8193)},   /* Dell Gobi 3000 QDL */
 122        {USB_DEVICE(0x413c, 0x8194)},   /* Dell Gobi 3000 Composite */
 123        {USB_DEVICE(0x413c, 0x81a6)},   /* Dell DW5570 QDL (MC8805) */
 124        {USB_DEVICE(0x1199, 0x68a4)},   /* Sierra Wireless QDL */
 125        {USB_DEVICE(0x1199, 0x68a5)},   /* Sierra Wireless Modem */
 126        {USB_DEVICE(0x1199, 0x68a8)},   /* Sierra Wireless QDL */
 127        {USB_DEVICE(0x1199, 0x68a9)},   /* Sierra Wireless Modem */
 128        {USB_DEVICE(0x1199, 0x9010)},   /* Sierra Wireless Gobi 3000 QDL */
 129        {USB_DEVICE(0x1199, 0x9012)},   /* Sierra Wireless Gobi 3000 QDL */
 130        {USB_DEVICE(0x1199, 0x9013)},   /* Sierra Wireless Gobi 3000 Modem device (MC8355) */
 131        {USB_DEVICE(0x1199, 0x9014)},   /* Sierra Wireless Gobi 3000 QDL */
 132        {USB_DEVICE(0x1199, 0x9015)},   /* Sierra Wireless Gobi 3000 Modem device */
 133        {USB_DEVICE(0x1199, 0x9018)},   /* Sierra Wireless Gobi 3000 QDL */
 134        {USB_DEVICE(0x1199, 0x9019)},   /* Sierra Wireless Gobi 3000 Modem device */
 135        {USB_DEVICE(0x1199, 0x901b)},   /* Sierra Wireless MC7770 */
 136        {USB_DEVICE(0x12D1, 0x14F0)},   /* Sony Gobi 3000 QDL */
 137        {USB_DEVICE(0x12D1, 0x14F1)},   /* Sony Gobi 3000 Composite */
 138        {USB_DEVICE(0x0AF0, 0x8120)},   /* Option GTM681W */
 139
 140        /* non-Gobi Sierra Wireless devices */
 141        {DEVICE_SWI(0x03f0, 0x4e1d)},   /* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */
 142        {DEVICE_SWI(0x0f3d, 0x68a2)},   /* Sierra Wireless MC7700 */
 143        {DEVICE_SWI(0x114f, 0x68a2)},   /* Sierra Wireless MC7750 */
 144        {DEVICE_SWI(0x1199, 0x68a2)},   /* Sierra Wireless MC7710 */
 145        {DEVICE_SWI(0x1199, 0x68c0)},   /* Sierra Wireless MC7304/MC7354 */
 146        {DEVICE_SWI(0x1199, 0x901c)},   /* Sierra Wireless EM7700 */
 147        {DEVICE_SWI(0x1199, 0x901e)},   /* Sierra Wireless EM7355 QDL */
 148        {DEVICE_SWI(0x1199, 0x901f)},   /* Sierra Wireless EM7355 */
 149        {DEVICE_SWI(0x1199, 0x9040)},   /* Sierra Wireless Modem */
 150        {DEVICE_SWI(0x1199, 0x9041)},   /* Sierra Wireless MC7305/MC7355 */
 151        {DEVICE_SWI(0x1199, 0x9051)},   /* Netgear AirCard 340U */
 152        {DEVICE_SWI(0x1199, 0x9053)},   /* Sierra Wireless Modem */
 153        {DEVICE_SWI(0x1199, 0x9054)},   /* Sierra Wireless Modem */
 154        {DEVICE_SWI(0x1199, 0x9055)},   /* Netgear AirCard 341U */
 155        {DEVICE_SWI(0x1199, 0x9056)},   /* Sierra Wireless Modem */
 156        {DEVICE_SWI(0x1199, 0x9060)},   /* Sierra Wireless Modem */
 157        {DEVICE_SWI(0x1199, 0x9061)},   /* Sierra Wireless Modem */
 158        {DEVICE_SWI(0x1199, 0x9063)},   /* Sierra Wireless EM7305 */
 159        {DEVICE_SWI(0x1199, 0x9070)},   /* Sierra Wireless MC74xx */
 160        {DEVICE_SWI(0x1199, 0x9071)},   /* Sierra Wireless MC74xx */
 161        {DEVICE_SWI(0x1199, 0x9078)},   /* Sierra Wireless EM74xx */
 162        {DEVICE_SWI(0x1199, 0x9079)},   /* Sierra Wireless EM74xx */
 163        {DEVICE_SWI(0x1199, 0x907a)},   /* Sierra Wireless EM74xx QDL */
 164        {DEVICE_SWI(0x1199, 0x907b)},   /* Sierra Wireless EM74xx */
 165        {DEVICE_SWI(0x1199, 0x9090)},   /* Sierra Wireless EM7565 QDL */
 166        {DEVICE_SWI(0x1199, 0x9091)},   /* Sierra Wireless EM7565 */
 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        {DEVICE_SWI(0x413c, 0x81cf)},   /* Dell Wireless 5819 */
 177        {DEVICE_SWI(0x413c, 0x81d0)},   /* Dell Wireless 5819 */
 178        {DEVICE_SWI(0x413c, 0x81d1)},   /* Dell Wireless 5818 */
 179        {DEVICE_SWI(0x413c, 0x81d2)},   /* Dell Wireless 5818 */
 180
 181        /* Huawei devices */
 182        {DEVICE_HWI(0x03f0, 0x581d)},   /* HP lt4112 LTE/HSPA+ Gobi 4G Modem (Huawei me906e) */
 183
 184        { }                             /* Terminating entry */
 185};
 186MODULE_DEVICE_TABLE(usb, id_table);
 187
 188static int handle_quectel_ec20(struct device *dev, int ifnum)
 189{
 190        int altsetting = 0;
 191
 192        /*
 193         * Quectel EC20 Mini PCIe LTE module layout:
 194         * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 195         * 1: NMEA
 196         * 2: AT-capable modem port
 197         * 3: Modem interface
 198         * 4: NDIS
 199         */
 200        switch (ifnum) {
 201        case 0:
 202                dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
 203                break;
 204        case 1:
 205                dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
 206                break;
 207        case 2:
 208        case 3:
 209                dev_dbg(dev, "Quectel EC20 Modem port found\n");
 210                break;
 211        case 4:
 212                /* Don't claim the QMI/net interface */
 213                altsetting = -1;
 214                break;
 215        }
 216
 217        return altsetting;
 218}
 219
 220static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 221{
 222        struct usb_host_interface *intf = serial->interface->cur_altsetting;
 223        struct device *dev = &serial->dev->dev;
 224        int retval = -ENODEV;
 225        __u8 nintf;
 226        __u8 ifnum;
 227        int altsetting = -1;
 228        bool sendsetup = false;
 229
 230        /* we only support vendor specific functions */
 231        if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
 232                goto done;
 233
 234        nintf = serial->dev->actconfig->desc.bNumInterfaces;
 235        dev_dbg(dev, "Num Interfaces = %d\n", nintf);
 236        ifnum = intf->desc.bInterfaceNumber;
 237        dev_dbg(dev, "This Interface = %d\n", ifnum);
 238
 239        if (nintf == 1) {
 240                /* QDL mode */
 241                /* Gobi 2000 has a single altsetting, older ones have two */
 242                if (serial->interface->num_altsetting == 2)
 243                        intf = &serial->interface->altsetting[1];
 244                else if (serial->interface->num_altsetting > 2)
 245                        goto done;
 246
 247                if (intf->desc.bNumEndpoints == 2 &&
 248                    usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
 249                    usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
 250                        dev_dbg(dev, "QDL port found\n");
 251
 252                        if (serial->interface->num_altsetting == 1)
 253                                retval = 0; /* Success */
 254                        else
 255                                altsetting = 1;
 256                }
 257                goto done;
 258
 259        }
 260
 261        /* default to enabling interface */
 262        altsetting = 0;
 263
 264        /*
 265         * Composite mode; don't bind to the QMI/net interface as that
 266         * gets handled by other drivers.
 267         */
 268
 269        switch (id->driver_info) {
 270        case QCSERIAL_G1K:
 271                /*
 272                 * Gobi 1K USB layout:
 273                 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 274                 * 1: serial port (doesn't respond)
 275                 * 2: AT-capable modem port
 276                 * 3: QMI/net
 277                 */
 278                if (nintf < 3 || nintf > 4) {
 279                        dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 280                        altsetting = -1;
 281                        goto done;
 282                }
 283
 284                if (ifnum == 0) {
 285                        dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
 286                        altsetting = 1;
 287                } else if (ifnum == 2)
 288                        dev_dbg(dev, "Modem port found\n");
 289                else
 290                        altsetting = -1;
 291                break;
 292        case QCSERIAL_G2K:
 293                /* handle non-standard layouts */
 294                if (nintf == 5 && id->idProduct == QUECTEL_EC20_PID) {
 295                        altsetting = handle_quectel_ec20(dev, ifnum);
 296                        goto done;
 297                }
 298
 299                /*
 300                 * Gobi 2K+ USB layout:
 301                 * 0: QMI/net
 302                 * 1: DM/DIAG (use libqcdm from ModemManager for communication)
 303                 * 2: AT-capable modem port
 304                 * 3: NMEA
 305                 */
 306                if (nintf < 3 || nintf > 4) {
 307                        dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 308                        altsetting = -1;
 309                        goto done;
 310                }
 311
 312                switch (ifnum) {
 313                case 0:
 314                        /* Don't claim the QMI/net interface */
 315                        altsetting = -1;
 316                        break;
 317                case 1:
 318                        dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n");
 319                        break;
 320                case 2:
 321                        dev_dbg(dev, "Modem port found\n");
 322                        break;
 323                case 3:
 324                        /*
 325                         * NMEA (serial line 9600 8N1)
 326                         * # echo "\$GPS_START" > /dev/ttyUSBx
 327                         * # echo "\$GPS_STOP"  > /dev/ttyUSBx
 328                         */
 329                        dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
 330                        break;
 331                }
 332                break;
 333        case QCSERIAL_SWI:
 334                /*
 335                 * Sierra Wireless layout:
 336                 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 337                 * 2: NMEA
 338                 * 3: AT-capable modem port
 339                 * 8: QMI/net
 340                 */
 341                switch (ifnum) {
 342                case 0:
 343                        dev_dbg(dev, "DM/DIAG interface found\n");
 344                        break;
 345                case 2:
 346                        dev_dbg(dev, "NMEA GPS interface found\n");
 347                        sendsetup = true;
 348                        break;
 349                case 3:
 350                        dev_dbg(dev, "Modem port found\n");
 351                        sendsetup = true;
 352                        break;
 353                default:
 354                        /* don't claim any unsupported interface */
 355                        altsetting = -1;
 356                        break;
 357                }
 358                break;
 359        case QCSERIAL_HWI:
 360                /*
 361                 * Huawei devices map functions by subclass + protocol
 362                 * instead of interface numbers. The protocol identify
 363                 * a specific function, while the subclass indicate a
 364                 * specific firmware source
 365                 *
 366                 * This is a blacklist of functions known to be
 367                 * non-serial.  The rest are assumed to be serial and
 368                 * will be handled by this driver
 369                 */
 370                switch (intf->desc.bInterfaceProtocol) {
 371                        /* QMI combined (qmi_wwan) */
 372                case 0x07:
 373                case 0x37:
 374                case 0x67:
 375                        /* QMI data (qmi_wwan) */
 376                case 0x08:
 377                case 0x38:
 378                case 0x68:
 379                        /* QMI control (qmi_wwan) */
 380                case 0x09:
 381                case 0x39:
 382                case 0x69:
 383                        /* NCM like (huawei_cdc_ncm) */
 384                case 0x16:
 385                case 0x46:
 386                case 0x76:
 387                        altsetting = -1;
 388                        break;
 389                default:
 390                        dev_dbg(dev, "Huawei type serial port found (%02x/%02x/%02x)\n",
 391                                intf->desc.bInterfaceClass,
 392                                intf->desc.bInterfaceSubClass,
 393                                intf->desc.bInterfaceProtocol);
 394                }
 395                break;
 396        default:
 397                dev_err(dev, "unsupported device layout type: %lu\n",
 398                        id->driver_info);
 399                break;
 400        }
 401
 402done:
 403        if (altsetting >= 0) {
 404                retval = usb_set_interface(serial->dev, ifnum, altsetting);
 405                if (retval < 0) {
 406                        dev_err(dev,
 407                                "Could not set interface, error %d\n",
 408                                retval);
 409                        retval = -ENODEV;
 410                }
 411        }
 412
 413        if (!retval)
 414                usb_set_serial_data(serial, (void *)(unsigned long)sendsetup);
 415
 416        return retval;
 417}
 418
 419static int qc_attach(struct usb_serial *serial)
 420{
 421        struct usb_wwan_intf_private *data;
 422        bool sendsetup;
 423
 424        data = kzalloc(sizeof(*data), GFP_KERNEL);
 425        if (!data)
 426                return -ENOMEM;
 427
 428        sendsetup = !!(unsigned long)(usb_get_serial_data(serial));
 429        if (sendsetup)
 430                data->use_send_setup = 1;
 431
 432        spin_lock_init(&data->susp_lock);
 433
 434        usb_set_serial_data(serial, data);
 435
 436        return 0;
 437}
 438
 439static void qc_release(struct usb_serial *serial)
 440{
 441        struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);
 442
 443        usb_set_serial_data(serial, NULL);
 444        kfree(priv);
 445}
 446
 447static struct usb_serial_driver qcdevice = {
 448        .driver = {
 449                .owner     = THIS_MODULE,
 450                .name      = "qcserial",
 451        },
 452        .description         = "Qualcomm USB modem",
 453        .id_table            = id_table,
 454        .num_ports           = 1,
 455        .probe               = qcprobe,
 456        .open                = usb_wwan_open,
 457        .close               = usb_wwan_close,
 458        .dtr_rts             = usb_wwan_dtr_rts,
 459        .write               = usb_wwan_write,
 460        .write_room          = usb_wwan_write_room,
 461        .chars_in_buffer     = usb_wwan_chars_in_buffer,
 462        .tiocmget            = usb_wwan_tiocmget,
 463        .tiocmset            = usb_wwan_tiocmset,
 464        .attach              = qc_attach,
 465        .release             = qc_release,
 466        .port_probe          = usb_wwan_port_probe,
 467        .port_remove         = usb_wwan_port_remove,
 468#ifdef CONFIG_PM
 469        .suspend             = usb_wwan_suspend,
 470        .resume              = usb_wwan_resume,
 471#endif
 472};
 473
 474static struct usb_serial_driver * const serial_drivers[] = {
 475        &qcdevice, NULL
 476};
 477
 478module_usb_serial_driver(serial_drivers, id_table);
 479
 480MODULE_AUTHOR(DRIVER_AUTHOR);
 481MODULE_DESCRIPTION(DRIVER_DESC);
 482MODULE_LICENSE("GPL v2");
 483