1 files changed, 30 insertions, 1 deletions

diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
index 2846ad8883ae..8858201eb1d3 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -152,7 +152,22 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
         case 3:
         case 4:
                 /* Composite mode */
-                if (ifnum == 2) {
+                /* ifnum == 0 is a broadband network adapter */
+                if (ifnum == 1) {
+                        /*
+                         * Diagnostics Monitor (serial line 9600 8N1)
+                         * Qualcomm DM protocol
+                         * use "libqcdm" (ModemManager) for communication
+                         */
+                        dbg("Diagnostics Monitor found");
+                        retval = usb_set_interface(serial->dev, ifnum, 0);
+                        if (retval < 0) {
+                                dev_err(&serial->dev->dev,
+                                        "Could not set interface, error %d\n",
+                                        retval);
+                                retval = -ENODEV;
+                        }
+                } else if (ifnum == 2) {
                         dbg("Modem port found");
                         retval = usb_set_interface(serial->dev, ifnum, 0);
                         if (retval < 0) {
@@ -163,6 +178,20 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
                                 kfree(data);
                         }
                         return retval;
+                } else if (ifnum==3) {
+                        /*
+                         * NMEA (serial line 9600 8N1)
+                         * # echo "\$GPS_START" > /dev/ttyUSBx
+                         * # echo "\$GPS_STOP"  > /dev/ttyUSBx
+                         */
+                        dbg("NMEA GPS interface found");
+                        retval = usb_set_interface(serial->dev, ifnum, 0);
+                        if (retval < 0) {
+                                dev_err(&serial->dev->dev,
+                                        "Could not set interface, error %d\n",
+                                        retval);
+                                retval = -ENODEV;
+                        }
                 }
                 break;