* Dan Williams <dcbw@xxxxxxxxxx> [180402 15:51]: > On Sun, 2018-04-01 at 10:30 -0700, Tony Lindgren wrote: > > * Tony Lindgren <tony@xxxxxxxxxxx> [180401 15:38]: > > Found it! Here's what I need to do over n_gsm: > > > > ngsm 1 "AT+CFUN=1" > > ngsm 1 "AT+CFUN?" > > ngsm 2 "AT+EACC=3,0" # enable mic > > ngsm 2 "AT+CLVL=4" # set speaker volume > > ngsm 2 "AT+CMUT=0" # unmute mic > > I tried to look through the QMI dumps we have in libqmi from 2013 > (latest Qualcomm posted) and couldn't find anything to do with mic > control, speaker volume, or anything like that. > > If the modem supports the AT service (which I think it does? Not > looking at the libqmi dumps right now) then it could potentially tunnel > these AT commands through QMI too. > > Perhaps Qualcomm added something to the Voice service after 2013, or > perhaps there are other services that might control speaker/mic that we > don't have public dumps for yet though. OK thanks for checking. So probably only n_gsm channel 1 is for normal Qualcomm at commands, and then channel 2 and others are commands implemented by Motorola on the mdm6600. I guess we'd have to add support for reading and writing to /dev/gsmtty2 at least as it looks like these cannot be accessed via /dev/ttyUSB4. Or at least I have not figured out any other way to access them. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
