From 1992de83e375acc789daf66b7b72a812a5235b75 Mon Sep 17 00:00:00 2001 From: "Matthias G. Eckermann" Date: Fri, 24 Sep 2010 18:12:01 +0200 Subject: [PATCH] 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 --- drivers/usb/serial/qcserial.c | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) 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; -- 2.20.1