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, 0x9062)},   /* Sierra Wireless EM7305 QDL */
 159         {DEVICE_SWI(0x1199, 0x9063)},   /* Sierra Wireless EM7305 */
 160         {DEVICE_SWI(0x1199, 0x9070)},   /* Sierra Wireless MC74xx */
 161         {DEVICE_SWI(0x1199, 0x9071)},   /* Sierra Wireless MC74xx */
 162         {DEVICE_SWI(0x1199, 0x9078)},   /* Sierra Wireless EM74xx */
 163         {DEVICE_SWI(0x1199, 0x9079)},   /* Sierra Wireless EM74xx */
 164         {DEVICE_SWI(0x1199, 0x907a)},   /* Sierra Wireless EM74xx QDL */
 165         {DEVICE_SWI(0x1199, 0x907b)},   /* Sierra Wireless EM74xx */
 166         {DEVICE_SWI(0x1199, 0x9090)},   /* Sierra Wireless EM7565 QDL */
 167         {DEVICE_SWI(0x1199, 0x9091)},   /* Sierra Wireless EM7565 */
 168         {DEVICE_SWI(0x413c, 0x81a2)},   /* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
 169         {DEVICE_SWI(0x413c, 0x81a3)},   /* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
 170         {DEVICE_SWI(0x413c, 0x81a4)},   /* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
 171         {DEVICE_SWI(0x413c, 0x81a8)},   /* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
 172         {DEVICE_SWI(0x413c, 0x81a9)},   /* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
 173         {DEVICE_SWI(0x413c, 0x81b1)},   /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card */
 174         {DEVICE_SWI(0x413c, 0x81b3)},   /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card (rev3) */
 175         {DEVICE_SWI(0x413c, 0x81b5)},   /* Dell Wireless 5811e QDL */
 176         {DEVICE_SWI(0x413c, 0x81b6)},   /* Dell Wireless 5811e QDL */
 177         {DEVICE_SWI(0x413c, 0x81cb)},   /* Dell Wireless 5816e QDL */
 178         {DEVICE_SWI(0x413c, 0x81cc)},   /* Dell Wireless 5816e */
 179         {DEVICE_SWI(0x413c, 0x81cf)},   /* Dell Wireless 5819 */
 180         {DEVICE_SWI(0x413c, 0x81d0)},   /* Dell Wireless 5819 */
 181         {DEVICE_SWI(0x413c, 0x81d1)},   /* Dell Wireless 5818 */
 182         {DEVICE_SWI(0x413c, 0x81d2)},   /* Dell Wireless 5818 */
 183
 184         /* Huawei devices */
 185         {DEVICE_HWI(0x03f0, 0x581d)},   /* HP lt4112 LTE/HSPA+ Gobi 4G Modem (Huawei me906e) */
 186
 187         { }                             /* Terminating entry */
 188 };
 189 MODULE_DEVICE_TABLE(usb, id_table);
 190
 191 static int handle_quectel_ec20(struct device *dev, int ifnum)
 192 {
 193         int altsetting = 0;
 194
 195         /*
 196          * Quectel EC20 Mini PCIe LTE module layout:
 197          * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 198          * 1: NMEA
 199          * 2: AT-capable modem port
 200          * 3: Modem interface
 201          * 4: NDIS
 202          */
 203         switch (ifnum) {
 204         case 0:
 205                 dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
 206                 break;
 207         case 1:
 208                 dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
 209                 break;
 210         case 2:
 211         case 3:
 212                 dev_dbg(dev, "Quectel EC20 Modem port found\n");
 213                 break;
 214         case 4:
 215                 /* Don't claim the QMI/net interface */
 216                 altsetting = -1;
 217                 break;
 218         }
 219
 220         return altsetting;
 221 }
 222
 223 static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 224 {
 225         struct usb_host_interface *intf = serial->interface->cur_altsetting;
 226         struct device *dev = &serial->dev->dev;
 227         int retval = -ENODEV;
 228         __u8 nintf;
 229         __u8 ifnum;
 230         int altsetting = -1;
 231         bool sendsetup = false;
 232
 233         /* we only support vendor specific functions */
 234         if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
 235                 goto done;
 236
 237         nintf = serial->dev->actconfig->desc.bNumInterfaces;
 238         dev_dbg(dev, "Num Interfaces = %d\n", nintf);
 239         ifnum = intf->desc.bInterfaceNumber;
 240         dev_dbg(dev, "This Interface = %d\n", ifnum);
 241
 242         if (nintf == 1) {
 243                 /* QDL mode */
 244                 /* Gobi 2000 has a single altsetting, older ones have two */
 245                 if (serial->interface->num_altsetting == 2)
 246                         intf = usb_altnum_to_altsetting(serial->interface, 1);
 247                 else if (serial->interface->num_altsetting > 2)
 248                         goto done;
 249
 250                 if (intf && intf->desc.bNumEndpoints == 2 &&
 251                     usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
 252                     usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
 253                         dev_dbg(dev, "QDL port found\n");
 254
 255                         if (serial->interface->num_altsetting == 1)
 256                                 retval = 0; /* Success */
 257                         else
 258                                 altsetting = 1;
 259                 }
 260                 goto done;
 261
 262         }
 263
 264         /* default to enabling interface */
 265         altsetting = 0;
 266
 267         /*
 268          * Composite mode; don't bind to the QMI/net interface as that
 269          * gets handled by other drivers.
 270          */
 271
 272         switch (id->driver_info) {
 273         case QCSERIAL_G1K:
 274                 /*
 275                  * Gobi 1K USB layout:
 276                  * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 277                  * 1: serial port (doesn't respond)
 278                  * 2: AT-capable modem port
 279                  * 3: QMI/net
 280                  */
 281                 if (nintf < 3 || nintf > 4) {
 282                         dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 283                         altsetting = -1;
 284                         goto done;
 285                 }
 286
 287                 if (ifnum == 0) {
 288                         dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
 289                         altsetting = 1;
 290                 } else if (ifnum == 2)
 291                         dev_dbg(dev, "Modem port found\n");
 292                 else
 293                         altsetting = -1;
 294                 break;
 295         case QCSERIAL_G2K:
 296                 /* handle non-standard layouts */
 297                 if (nintf == 5 && id->idProduct == QUECTEL_EC20_PID) {
 298                         altsetting = handle_quectel_ec20(dev, ifnum);
 299                         goto done;
 300                 }
 301
 302                 /*
 303                  * Gobi 2K+ USB layout:
 304                  * 0: QMI/net
 305                  * 1: DM/DIAG (use libqcdm from ModemManager for communication)
 306                  * 2: AT-capable modem port
 307                  * 3: NMEA
 308                  */
 309                 if (nintf < 3 || nintf > 4) {
 310                         dev_err(dev, "unknown number of interfaces: %d\n", nintf);
 311                         altsetting = -1;
 312                         goto done;
 313                 }
 314
 315                 switch (ifnum) {
 316                 case 0:
 317                         /* Don't claim the QMI/net interface */
 318                         altsetting = -1;
 319                         break;
 320                 case 1:
 321                         dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n");
 322                         break;
 323                 case 2:
 324                         dev_dbg(dev, "Modem port found\n");
 325                         break;
 326                 case 3:
 327                         /*
 328                          * NMEA (serial line 9600 8N1)
 329                          * # echo "\$GPS_START" > /dev/ttyUSBx
 330                          * # echo "\$GPS_STOP"  > /dev/ttyUSBx
 331                          */
 332                         dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
 333                         break;
 334                 }
 335                 break;
 336         case QCSERIAL_SWI:
 337                 /*
 338                  * Sierra Wireless layout:
 339                  * 0: DM/DIAG (use libqcdm from ModemManager for communication)
 340                  * 2: NMEA
 341                  * 3: AT-capable modem port
 342                  * 8: QMI/net
 343                  */
 344                 switch (ifnum) {
 345                 case 0:
 346                         dev_dbg(dev, "DM/DIAG interface found\n");
 347                         break;
 348                 case 2:
 349                         dev_dbg(dev, "NMEA GPS interface found\n");
 350                         sendsetup = true;
 351                         break;
 352                 case 3:
 353                         dev_dbg(dev, "Modem port found\n");
 354                         sendsetup = true;
 355                         break;
 356                 default:
 357                         /* don't claim any unsupported interface */
 358                         altsetting = -1;
 359                         break;
 360                 }
 361                 break;
 362         case QCSERIAL_HWI:
 363                 /*
 364                  * Huawei devices map functions by subclass + protocol
 365                  * instead of interface numbers. The protocol identify
 366                  * a specific function, while the subclass indicate a
 367                  * specific firmware source
 368                  *
 369                  * This is a list of functions known to be non-serial.  The rest
 370                  * are assumed to be serial and will be handled by this driver
 371                  */
 372                 switch (intf->desc.bInterfaceProtocol) {
 373                         /* QMI combined (qmi_wwan) */
 374                 case 0x07:
 375                 case 0x37:
 376                 case 0x67:
 377                         /* QMI data (qmi_wwan) */
 378                 case 0x08:
 379                 case 0x38:
 380                 case 0x68:
 381                         /* QMI control (qmi_wwan) */
 382                 case 0x09:
 383                 case 0x39:
 384                 case 0x69:
 385                         /* NCM like (huawei_cdc_ncm) */
 386                 case 0x16:
 387                 case 0x46:
 388                 case 0x76:
 389                         altsetting = -1;
 390                         break;
 391                 default:
 392                         dev_dbg(dev, "Huawei type serial port found (%02x/%02x/%02x)\n",
 393                                 intf->desc.bInterfaceClass,
 394                                 intf->desc.bInterfaceSubClass,
 395                                 intf->desc.bInterfaceProtocol);
 396                 }
 397                 break;
 398         default:
 399                 dev_err(dev, "unsupported device layout type: %lu\n",
 400                         id->driver_info);
 401                 break;
 402         }
 403
 404 done:
 405         if (altsetting >= 0) {
 406                 retval = usb_set_interface(serial->dev, ifnum, altsetting);
 407                 if (retval < 0) {
 408                         dev_err(dev,
 409                                 "Could not set interface, error %d\n",
 410                                 retval);
 411                         retval = -ENODEV;
 412                 }
 413         }
 414
 415         if (!retval)
 416                 usb_set_serial_data(serial, (void *)(unsigned long)sendsetup);
 417
 418         return retval;
 419 }
 420
 421 static int qc_attach(struct usb_serial *serial)
 422 {
 423         struct usb_wwan_intf_private *data;
 424         bool sendsetup;
 425
 426         data = kzalloc(sizeof(*data), GFP_KERNEL);
 427         if (!data)
 428                 return -ENOMEM;
 429
 430         sendsetup = !!(unsigned long)(usb_get_serial_data(serial));
 431         if (sendsetup)
 432                 data->use_send_setup = 1;
 433
 434         spin_lock_init(&data->susp_lock);
 435
 436         usb_set_serial_data(serial, data);
 437
 438         return 0;
 439 }
 440
 441 static void qc_release(struct usb_serial *serial)
 442 {
 443         struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);
 444
 445         usb_set_serial_data(serial, NULL);
 446         kfree(priv);
 447 }
 448
 449 static struct usb_serial_driver qcdevice = {
 450         .driver = {
 451                 .owner     = THIS_MODULE,
 452                 .name      = "qcserial",
 453         },
 454         .description         = "Qualcomm USB modem",
 455         .id_table            = id_table,
 456         .num_ports           = 1,
 457         .probe               = qcprobe,
 458         .open                = usb_wwan_open,
 459         .close               = usb_wwan_close,
 460         .dtr_rts             = usb_wwan_dtr_rts,
 461         .write               = usb_wwan_write,
 462         .write_room          = usb_wwan_write_room,
 463         .chars_in_buffer     = usb_wwan_chars_in_buffer,
 464         .tiocmget            = usb_wwan_tiocmget,
 465         .tiocmset            = usb_wwan_tiocmset,
 466         .attach              = qc_attach,
 467         .release             = qc_release,
 468         .port_probe          = usb_wwan_port_probe,
 469         .port_remove         = usb_wwan_port_remove,
 470 #ifdef CONFIG_PM
 471         .suspend             = usb_wwan_suspend,
 472         .resume              = usb_wwan_resume,
 473 #endif
 474 };
 475
 476 static struct usb_serial_driver * const serial_drivers[] = {
 477         &qcdevice, NULL
 478 };
 479
 480 module_usb_serial_driver(serial_drivers, id_table);
 481
 482 MODULE_AUTHOR(DRIVER_AUTHOR);
 483 MODULE_DESCRIPTION(DRIVER_DESC);
 484 MODULE_LICENSE("GPL v2");