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 -- Best Regards, Peter Chen -- 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
