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