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 -- 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
