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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: Matthias G. Eckermann <mge@arcor.de>
This commit is contained in:
Matthias G. Eckermann 2010-09-24 18:12:01 +02:00 committed by Greg Kroah-Hartman
parent 6195e3c6aa
commit 1992de83e3
1 changed files with 30 additions and 1 deletions
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31
drivers/usb/serial/qcserial.c
View File

@ -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;