> On Mon, Jun 13, 2016 at 11:56 PM, Peter Chen <hzpeterchen@xxxxxxxxx> wrote: >> >> On Tue, Jun 14, 2016 at 02:00:23PM +0800, Peter Chen wrote: >> > On Mon, Jun 13, 2016 at 04:49:50PM -0700, Caleb Crome wrote: >> > > On Mon, Jun 13, 2016 at 4:04 PM, Caleb Crome <caleb@xxxxxxxxx> wrote: >> > > > On Mon, Jun 13, 2016 at 2:53 AM, Peter Chen <hzpeterchen@xxxxxxxxx> wrote: >> > > >> On Wed, Jun 08, 2016 at 04:11:11PM -0700, Caleb Crome wrote: >> > > >>> >> > > >>> Here is the script I use for starting the gadget interface: >> > > >>> >> > > >>> cd /sys/kernel/config/usb_gadget >> > > >>> mkdir g1 >> > > >>> cd g1 >> > > >>> echo "0x1d6b" > idVendor >> > > >>> echo "0x0104" > idProduct >> > > >>> mkdir strings/0x409 >> > > >>> echo "0123456789" > strings/0x409/serialnumber >> > > >>> echo "Foo Inc." > strings/0x409/manufacturer >> > > >>> echo "Bar Gadget" > strings/0x409/product >> > > >>> mkdir functions/uac2.aud0 >> > > >>> mkdir functions/ecm.usb0 >> > > >>> #echo 64000 > functions/uac2.aud0/c_srate >> > > >>> #echo 64000 > functions/uac2.aud0/p_srate >> > > >>> mkdir configs/c.1 >> > > >>> mkdir configs/c.1/strings/0x409 >> > > >>> echo "CDC ECM + audio" > configs/c.1/strings/0x409/configuration >> > > >>> ln -s functions/uac2.aud0 configs/c.1 >> > > >>> ln -s functions/ecm.usb0 configs/c.1 >> > > >>> echo `ls /sys/class/udc/` > /sys/kernel/config/usb_gadget/g1/UDC >> > > >>> >> > > >> >> > > >> Try to use below command to see if it works, it works at my i.mx6 board. >> > > >> >> > > >> 1. **** List of PLAYBACK Hardware Devices **** >> > > >> root@imx6sxsabresd:~# aplay -l >> > > >> **** List of PLAYBACK Hardware Devices **** >> > > >> card 0: wm8962audio [wm8962-audio], device 0: HiFi wm8962-0 [] >> > > >> Subdevices: 1/1 >> > > >> Subdevice #0: subdevice #0 >> > > >> card 1: imxspdif [imx-spdif], device 0: S/PDIF PCM Playback dit-hifi-0 [] >> > > >> Subdevices: 1/1 >> > > >> Subdevice #0: subdevice #0 >> > > >> card 2: UAC2Gadget [UAC2_Gadget], device 0: UAC2 PCM [UAC2 PCM] >> > > >> Subdevices: 1/1 >> > > >> Subdevice #0: subdevice #0 >> > > >> 2. **** List of CAPTURE Hardware Devices **** >> > > >> root@imx6sxsabresd:~# arecord -l >> > > >> **** List of CAPTURE Hardware Devices **** >> > > >> card 0: wm8962audio [wm8962-audio], device 0: HiFi wm8962-0 [] >> > > >> Subdevices: 1/1 >> > > >> Subdevice #0: subdevice #0 >> > > >> card 2: UAC2Gadget [UAC2_Gadget], device 0: UAC2 PCM [UAC2 PCM] >> > > >> Subdevices: 1/1 >> > > >> Subdevice #0: subdevice #0 >> > > >> 3. Using below command to play (it is playback, the audio file is from >> > > >> PC) >> > > >> root@imx6sxsabresd:~# arecord -f dat -t wav -D hw:2,0 | aplay -D hw:0,0 & >> > > >> >> > > >> NOTE: arecord uses uac2_gadget to record, aplay uses real codec to play >> > > >> >> > > > >> > > > Great to hear that it works on your board, that gives me hope :-) >> > > > >> > > > 2 questions: >> > > > 1) What kernel version do you use? >> > > > 2) What are the commands you send to configfs to get it working? Does >> > > > it look like mine? >> > > > >> > >> > I tried your commands, it can't work indeed. It seems the two interfaces >> > can't be work together, the host side can't find the USB audio device. >> > My test branch: >> > https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git >> > branch: testing/next >> > >> > Works command: >> > modprobe libcomposite >> > mount none /sys/kernel/config/ -t configfs >> > cd /sys/kernel/config/usb_gadget >> > mkdir g1 >> > cd g1 >> > echo "0x1d6b" > idVendor >> > echo "0x0104" > idProduct >> > mkdir strings/0x409 >> > echo "0123456789" > strings/0x409/serialnumber >> > echo "Foo Inc." > strings/0x409/manufacturer >> > echo "Bar Gadget" > strings/0x409/product >> > mkdir functions/uac2.aud0 >> > # mkdir functions/ecm.usb0 >> > >> > mkdir configs/c.1 >> > mkdir configs/c.1/strings/0x409 >> > # echo "CDC ECM + audio" > configs/c.1/strings/0x409/configuration >> > >> > >> > echo 2 > functions/uac2.aud0/p_ssize >> > echo 48000 > functions/uac2.aud0/p_srate >> > echo 3 > functions/uac2.aud0/p_chmask >> > >> > echo 2 > functions/uac2.aud0/c_ssize >> > echo 48000 > functions/uac2.aud0/c_srate >> > echo 3 > functions/uac2.aud0/c_chmask >> > >> > ln -s functions/uac2.aud0 configs/c.1 >> > # ln -s functions/ecm.usb0 configs/c.1 >> > >> > echo `ls /sys/class/udc/` > /sys/kernel/config/usb_gadget/g1/UDC >> > >> > At host side: >> > aplay -Dhw:1 sine48k16s-5min.wav >> > card 1: Gadget [Bar Gadget], device 0: USB Audio [USB Audio] >> > Subdevices: 1/1 >> > Subdevice #0: subdevice #0 >> > >> > At device side: >> > arecord -f dat -t wav -D hw:2,0 | aplay -D hw:0,0 & >> > >> > I can hear the wav from my codec >> > >> >> When I try to fix that issue, I find this issue is gone. Both >> ncm and usb audio works properly. Below is my commands: >> >> modprobe libcomposite >> # echo "file drivers/usb/* +p" > /sys/kernel/debug/dynamic_debug/control >> >> mount none /sys/kernel/config/ -t configfs >> cd /sys/kernel/config/usb_gadget >> mkdir g1 >> cd g1 >> echo "0x1d6b" > idVendor >> echo "0x0104" > idProduct >> mkdir strings/0x409 >> echo "0123456789" > strings/0x409/serialnumber >> echo "Foo Inc." > strings/0x409/manufacturer >> echo "Bar Gadget" > strings/0x409/product >> mkdir functions/uac2.aud0 >> mkdir functions/ecm.usb0 >> >> mkdir configs/c.1 >> mkdir configs/c.1/strings/0x409 >> echo "CDC ECM + audio" > configs/c.1/strings/0x409/configuration >> >> >> echo 2 > functions/uac2.aud0/p_ssize >> echo 48000 > functions/uac2.aud0/p_srate >> echo 3 > functions/uac2.aud0/p_chmask >> >> echo 2 > functions/uac2.aud0/c_ssize >> echo 48000 > functions/uac2.aud0/c_srate >> echo 3 > functions/uac2.aud0/c_chmask >> >> ln -s functions/uac2.aud0 configs/c.1 >> ln -s functions/ecm.usb0 configs/c.1 >> >> echo `ls /sys/class/udc/` > /sys/kernel/config/usb_gadget/g1/UDC >> >> -- >> >> Best Regards, >> Peter Chen Thanks so much for your help Peter! It does sort of work! My previous problem was that I wasn't playing anything on the host when I was attempting to record. I thought it would just be sending zeros all the time, but no, it times out. Unfortunately, it's not reliable for me. I try this: on MX6: # arecord -f dat -t wav -D hw:1,0 | aplay -f dat -t wav -D hw:1,0 Notice that I'm just looping the data back to card 1. I'm not attempting to play out the sound card on the MX6 and on host I bring up audacity and and simultaneously play and record. It does kind of work, but it's full of glitches and gaps. And for some reason the volume is changed! Strange. I also try: jackd -d alsa -d hw:1,0 -D -i2 -o2 -S -r48000& but that really doesn't work when I try to connect. So... it's definitely not usable at this point for me. Maybe with some some parameter tweaking it would work. Cheers, -Caleb > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
