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qcserial: bind to DM/DIAG port on Gobi 1K devices 

Turns out we just need altsetting 1 and then we can talk to it.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Dan Williams 2013-03-13 09:58:18 -05:00 committed by Greg Kroah-Hartman
parent c0f5ecee4e
commit 3f8bc5e4da
1 changed files with 5 additions and 2 deletions
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7
drivers/usb/serial/qcserial.c
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@ -197,12 +197,15 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
if (is_gobi1k) {
/* Gobi 1K USB layout:
* 0: serial port (doesn't respond)
* 0: DM/DIAG (use libqcdm from ModemManager for communication)
* 1: serial port (doesn't respond)
* 2: AT-capable modem port
* 3: QMI/net
*/
if (ifnum == 2)
if (ifnum == 0) {
dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
altsetting = 1;
} else if (ifnum == 2)
dev_dbg(dev, "Modem port found\n");
else
altsetting = -1;