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(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 };
 182 MODULE_DEVICE_TABLE(usb, id_table);
 183
 184 static 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
 216 static 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
 397 done:
 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
 414 static 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
 434 static 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
 442 static 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
 467 static struct usb_serial_driver * const serial_drivers[] = {
 468         &qcdevice, NULL
 469 };
 470
 471 module_usb_serial_driver(serial_drivers, id_table);
 472
 473 MODULE_AUTHOR(DRIVER_AUTHOR);
 474 MODULE_DESCRIPTION(DRIVER_DESC);
 475 MODULE_LICENSE("GPL v2");