target/linux/generic/patches-3.18/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch

   1 From 128524b9db3e4f4245226852bee771bd03db75be Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
   3 Date: Tue, 3 Nov 2015 11:01:42 +0100
   4 Subject: [PATCH 1/2] USB: qcserial: Add support for Quectel EC20 Mini PCIe
   5  module
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 It seems like this device has same vendor and product IDs as G2K
  11 devices, but it has different number of interfaces(4 vs 5) and also
  12 different interface layout which makes it currently unusable:
  13
  14         usbcore: registered new interface driver qcserial
  15         usbserial: USB Serial support registered for Qualcomm USB modem
  16         usb 2-1.2: unknown number of interfaces: 5
  17
  18 lsusb output:
  19
  20         Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000 Wireless
  21         Device Descriptor:
  22           bLength                18
  23           bDescriptorType         1
  24           bcdUSB               2.00
  25           bDeviceClass            0 (Defined at Interface level)
  26           bDeviceSubClass         0
  27           bDeviceProtocol         0
  28           bMaxPacketSize0        64
  29           idVendor           0x05c6 Qualcomm, Inc.
  30           idProduct          0x9215 Acer Gobi 2000 Wireless Modem
  31           bcdDevice            2.32
  32           iManufacturer           1 Quectel
  33           iProduct                2 Quectel LTE Module
  34           iSerial                 0
  35           bNumConfigurations      1
  36           Configuration Descriptor:
  37             bLength                 9
  38             bDescriptorType         2
  39             wTotalLength          209
  40             bNumInterfaces          5
  41             bConfigurationValue     1
  42             iConfiguration          0
  43             bmAttributes         0xa0
  44               (Bus Powered)
  45               Remote Wakeup
  46             MaxPower              500mA
  47
  48 Signed-off-by: Petr Štetiar <ynezz@true.cz>
  49 ---
  50  drivers/usb/serial/qcserial.c |   39 +++++++++++++++++++++++++++++++++++++++
  51  1 file changed, 39 insertions(+)
  52
  53 --- a/drivers/usb/serial/qcserial.c
  54 +++ b/drivers/usb/serial/qcserial.c
  55 @@ -22,6 +22,8 @@
  56  #define DRIVER_AUTHOR "Qualcomm Inc"
  57  #define DRIVER_DESC "Qualcomm USB Serial driver"
  58
  59 +#define QUECTEL_EC20_IDPRODUCT 0x9215
  60 +
  61  /* standard device layouts supported by this driver */
  62  enum qcserial_layouts {
  63         QCSERIAL_G2K = 0,       /* Gobi 2000 */
  64 @@ -166,6 +168,38 @@ static const struct usb_device_id id_tab
  65  };
  66  MODULE_DEVICE_TABLE(usb, id_table);
  67
  68 +static int handle_quectel_ec20(struct device *dev, int ifnum)
  69 +{
  70 +       int altsetting = 0;
  71 +
  72 +       /*
  73 +        * Quectel EC20 Mini PCIe LTE module layout:
  74 +        * 0: DM/DIAG (use libqcdm from ModemManager for communication)
  75 +        * 1: NMEA
  76 +        * 2: AT-capable modem port
  77 +        * 3: Modem interface
  78 +        * 4: NDIS
  79 +        */
  80 +       switch (ifnum) {
  81 +       case 0:
  82 +               dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
  83 +               break;
  84 +       case 1:
  85 +               dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
  86 +               break;
  87 +       case 2:
  88 +       case 3:
  89 +               dev_dbg(dev, "Quectel EC20 Modem port found\n");
  90 +               break;
  91 +       case 4:
  92 +               /* Don't claim the QMI/net interface */
  93 +               altsetting = -1;
  94 +               break;
  95 +       }
  96 +
  97 +       return altsetting;
  98 +}
  99 +
 100  static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
 101  {
 102         struct usb_host_interface *intf = serial->interface->cur_altsetting;
 103 @@ -234,6 +268,11 @@ static int qcprobe(struct usb_serial *se
 104                         altsetting = -1;
 105                 break;
 106         case QCSERIAL_G2K:
 107 +               if (nintf == 5 && id->idProduct == QUECTEL_EC20_IDPRODUCT) {
 108 +                       altsetting = handle_quectel_ec20(dev, ifnum);
 109 +                       goto done;
 110 +               }
 111 +
 112                 /*
 113                  * Gobi 2K+ USB layout:
 114                  * 0: QMI/net