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 */
  24 enum 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
  38 static 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(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         {DEVICE_SWI(0x413c, 0x81cf)},   /* Dell Wireless 5819 */
 175         {DEVICE_SWI(0x413c, 0x81d0)},   /* Dell Wireless 5819 */
 176         {DEVICE_SWI(0x413c, 0x81d1)},   /* Dell Wireless 5818 */
 177         {DEVICE_SWI(0x413c, 0x81d2)},   /* Dell Wireless 5818 */
 178
 179         /* Huawei devices */
 180         {DEVICE_HWI(0x03f0, 0x581d)},   /* HP lt4112 LTE/HSPA+ Gobi 4G Modem (Huawei me906e) */
 181
 182         { }                             /* Terminating entry */
 183 };
 184 MODULE_DEVICE_TABLE(usb, id_table);
 185
 186 static int handle_quectel_ec20(struct device *dev, int ifnum)
 187 {
 188         int altsetting = 0;
 189
 190         /*
 191          * Quectel EC20 Mini PCIe LTE module layout:
 192          * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 193          * 1: NMEA
 194          * 2: AT-capable modem port
 195          * 3: Modem interface
 196          * 4: NDIS
 197          */
 198         switch (ifnum) {
 199         case 0:
 200                 dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
 201                 break;
 202         case 1:
 203                 dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
 204                 break;
 205         case 2:
 206         case 3:
 207                 dev_dbg(dev, "Quectel EC20 Modem port found\n");
 208                 break;
 209         case 4:
 210                 /* Don't claim the QMI/net interface */
 211                 altsetting = -1;
 212                 break;
 213         }
 214
 215         return altsetting;
 216 }
 217
 218 static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 219 {
 220         struct usb_host_interface *intf = serial->interface->cur_altsetting;
 221         struct device *dev = &serial->dev->dev;
 222         int retval = -ENODEV;
 223         __u8 nintf;
 224         __u8 ifnum;
 225         int altsetting = -1;
 226         bool sendsetup = false;
 227
 228         /* we only support vendor specific functions */
 229         if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
 230                 goto done;
 231
 232         nintf = serial->dev->actconfig->desc.bNumInterfaces;
 233         dev_dbg(dev, "Num Interfaces = %d\n", nintf);
 234         ifnum = intf->desc.bInterfaceNumber;
 235         dev_dbg(dev, "This Interface = %d\n", ifnum);
 236
 237         if (nintf == 1) {
 238                 /* QDL mode */
 239                 /* Gobi 2000 has a single altsetting, older ones have two */
 240                 if (serial->interface->num_altsetting == 2)
 241                         intf = &serial->interface->altsetting[1];
 242                 else if (serial->interface->num_altsetting > 2)
 243                         goto done;
 244
 245                 if (intf->desc.bNumEndpoints == 2 &&
 246                     usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
 247                     usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
 248                         dev_dbg(dev, "QDL port found\n");
 249
 250                         if (serial->interface->num_altsetting == 1)
 251                                 retval = 0; /* Success */
 252                         else
 253                                 altsetting = 1;
 254                 }
 255                 goto done;
 256
 257         }
 258
 259         /* default to enabling interface */
 260         altsetting = 0;
 261
 262         /*
 263          * Composite mode; don't bind to the QMI/net interface as that
 264          * gets handled by other drivers.
 265          */
 266
 267         switch (id->driver_info) {
 268         case QCSERIAL_G1K:
 269                 /*
 270                  * Gobi 1K USB layout:
 271                  * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 272                  * 1: serial port (doesn't respond)
 273                  * 2: AT-capable modem port
 274                  * 3: QMI/net
 275                  */
 276                 if (nintf < 3 || nintf > 4) {
 277                         dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 278                         altsetting = -1;
 279                         goto done;
 280                 }
 281
 282                 if (ifnum == 0) {
 283                         dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
 284                         altsetting = 1;
 285                 } else if (ifnum == 2)
 286                         dev_dbg(dev, "Modem port found\n");
 287                 else
 288                         altsetting = -1;
 289                 break;
 290         case QCSERIAL_G2K:
 291                 /* handle non-standard layouts */
 292                 if (nintf == 5 && id->idProduct == QUECTEL_EC20_PID) {
 293                         altsetting = handle_quectel_ec20(dev, ifnum);
 294                         goto done;
 295                 }
 296
 297                 /*
 298                  * Gobi 2K+ USB layout:
 299                  * 0: QMI/net
 300                  * 1: DM/DIAG (use libqcdm from ModemManager for communication)
 301                  * 2: AT-capable modem port
 302                  * 3: NMEA
 303                  */
 304                 if (nintf < 3 || nintf > 4) {
 305                         dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 306                         altsetting = -1;
 307                         goto done;
 308                 }
 309
 310                 switch (ifnum) {
 311                 case 0:
 312                         /* Don't claim the QMI/net interface */
 313                         altsetting = -1;
 314                         break;
 315                 case 1:
 316                         dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n");
 317                         break;
 318                 case 2:
 319                         dev_dbg(dev, "Modem port found\n");
 320                         break;
 321                 case 3:
 322                         /*
 323                          * NMEA (serial line 9600 8N1)
 324                          * # echo "\$GPS_START" > /dev/ttyUSBx
 325                          * # echo "\$GPS_STOP"  > /dev/ttyUSBx
 326                          */
 327                         dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
 328                         break;
 329                 }
 330                 break;
 331         case QCSERIAL_SWI:
 332                 /*
 333                  * Sierra Wireless layout:
 334                  * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 335                  * 2: NMEA
 336                  * 3: AT-capable modem port
 337                  * 8: QMI/net
 338                  */
 339                 switch (ifnum) {
 340                 case 0:
 341                         dev_dbg(dev, "DM/DIAG interface found\n");
 342                         break;
 343                 case 2:
 344                         dev_dbg(dev, "NMEA GPS interface found\n");
 345                         break;
 346                 case 3:
 347                         dev_dbg(dev, "Modem port found\n");
 348                         sendsetup = true;
 349                         break;
 350                 default:
 351                         /* don't claim any unsupported interface */
 352                         altsetting = -1;
 353                         break;
 354                 }
 355                 break;
 356         case QCSERIAL_HWI:
 357                 /*
 358                  * Huawei devices map functions by subclass + protocol
 359                  * instead of interface numbers. The protocol identify
 360                  * a specific function, while the subclass indicate a
 361                  * specific firmware source
 362                  *
 363                  * This is a blacklist of functions known to be
 364                  * non-serial.  The rest are assumed to be serial and
 365                  * will be handled by this driver
 366                  */
 367                 switch (intf->desc.bInterfaceProtocol) {
 368                         /* QMI combined (qmi_wwan) */
 369                 case 0x07:
 370                 case 0x37:
 371                 case 0x67:
 372                         /* QMI data (qmi_wwan) */
 373                 case 0x08:
 374                 case 0x38:
 375                 case 0x68:
 376                         /* QMI control (qmi_wwan) */
 377                 case 0x09:
 378                 case 0x39:
 379                 case 0x69:
 380                         /* NCM like (huawei_cdc_ncm) */
 381                 case 0x16:
 382                 case 0x46:
 383                 case 0x76:
 384                         altsetting = -1;
 385                         break;
 386                 default:
 387                         dev_dbg(dev, "Huawei type serial port found (%02x/%02x/%02x)\n",
 388                                 intf->desc.bInterfaceClass,
 389                                 intf->desc.bInterfaceSubClass,
 390                                 intf->desc.bInterfaceProtocol);
 391                 }
 392                 break;
 393         default:
 394                 dev_err(dev, "unsupported device layout type: %lu\n",
 395                         id->driver_info);
 396                 break;
 397         }
 398
 399 done:
 400         if (altsetting >= 0) {
 401                 retval = usb_set_interface(serial->dev, ifnum, altsetting);
 402                 if (retval < 0) {
 403                         dev_err(dev,
 404                                 "Could not set interface, error %d\n",
 405                                 retval);
 406                         retval = -ENODEV;
 407                 }
 408         }
 409
 410         if (!retval)
 411                 usb_set_serial_data(serial, (void *)(unsigned long)sendsetup);
 412
 413         return retval;
 414 }
 415
 416 static int qc_attach(struct usb_serial *serial)
 417 {
 418         struct usb_wwan_intf_private *data;
 419         bool sendsetup;
 420
 421         data = kzalloc(sizeof(*data), GFP_KERNEL);
 422         if (!data)
 423                 return -ENOMEM;
 424
 425         sendsetup = !!(unsigned long)(usb_get_serial_data(serial));
 426         if (sendsetup)
 427                 data->use_send_setup = 1;
 428
 429         spin_lock_init(&data->susp_lock);
 430
 431         usb_set_serial_data(serial, data);
 432
 433         return 0;
 434 }
 435
 436 static void qc_release(struct usb_serial *serial)
 437 {
 438         struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);
 439
 440         usb_set_serial_data(serial, NULL);
 441         kfree(priv);
 442 }
 443
 444 static struct usb_serial_driver qcdevice = {
 445         .driver = {
 446                 .owner     = THIS_MODULE,
 447                 .name      = "qcserial",
 448         },
 449         .description         = "Qualcomm USB modem",
 450         .id_table            = id_table,
 451         .num_ports           = 1,
 452         .probe               = qcprobe,
 453         .open                = usb_wwan_open,
 454         .close               = usb_wwan_close,
 455         .dtr_rts             = usb_wwan_dtr_rts,
 456         .write               = usb_wwan_write,
 457         .write_room          = usb_wwan_write_room,
 458         .chars_in_buffer     = usb_wwan_chars_in_buffer,
 459         .tiocmget            = usb_wwan_tiocmget,
 460         .tiocmset            = usb_wwan_tiocmset,
 461         .attach              = qc_attach,
 462         .release             = qc_release,
 463         .port_probe          = usb_wwan_port_probe,
 464         .port_remove         = usb_wwan_port_remove,
 465 #ifdef CONFIG_PM
 466         .suspend             = usb_wwan_suspend,
 467         .resume              = usb_wwan_resume,
 468 #endif
 469 };
 470
 471 static struct usb_serial_driver * const serial_drivers[] = {
 472         &qcdevice, NULL
 473 };
 474
 475 module_usb_serial_driver(serial_drivers, id_table);
 476
 477 MODULE_AUTHOR(DRIVER_AUTHOR);
 478 MODULE_DESCRIPTION(DRIVER_DESC);
 479 MODULE_LICENSE("GPL v2");