Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1992de83 authored by Matthias G. Eckermann's avatar Matthias G. Eckermann Committed by Greg Kroah-Hartman
Browse files

USB: qcserial: Enable Diagnostics Monitor and GPS ports on Gobi 2000 

this patch to qcserial.c enables the Diagnostics Monitor
and NMEA GPS ports on Qualcomm Gobi 2000 devices.

A Gobi 2000 device will provide 3 serial ports:
        # /dev/ttyUSB0 -> Diagnostics
        # /dev/ttyUSB1 -> 3G Modem
        # /dev/ttyUSB2 -> NMEA GPS port

* The Diagnostics Monitor uses Qualcomm's DM protocol; I used
  libqcdm (ModemManager) to talk to it, found it working, but at
  least DM commands 12 and 64 are not implemented on my device
  (Gobi 2000 built into Thinkpad x100e).

* Functionality of the 3G Modem port remains unchanged.

* The GPS port and how to enable it has been confirmed now in the
  Gobi 3000 source code at:
	https://www.codeaurora.org/patches/quic/gobi/


  Enable/disable GPS via:
        echo "\$GPS_START" > /dev/ttyUSB2
        # use GPS
        echo "\$GPS_STOP"  > /dev/ttyUSB2


Signed-off-by: default avatarMatthias G. Eckermann <mge@arcor.de>
parent 6195e3c6

drivers/usb/serial/qcserial.c

+30 −1
Original line number Diff line number Diff line
@@ -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;