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? The command you suggest # arecord -f dat -t wav -D hw:2,0 does not work for me: again, I get an error message: # arecord: pcm_read:2031: read error: Input/output error >> >> When I run the script above I get the following dumped into /var/log/syslog: >> Jun 8 23:08:14 wandboard kernel: [ 139.994081] using random self >> ethernet address >> Jun 8 23:08:14 wandboard kernel: [ 139.994107] using random host >> ethernet address >> Jun 8 23:08:14 wandboard NetworkManager[359]: >> nm_device_get_device_type: assertion 'NM_IS_DEVICE (self)' failed >> Jun 8 23:08:14 wandboard NetworkManager[359]: <info> (usb0): new >> Generic device (carrier: OFF, driver: 'g_ether', ifindex: 4) >> Jun 8 23:08:14 wandboard kernel: [ 140.125255] usb0: HOST MAC >> 3e:52:2d:0d:98:fe >> Jun 8 23:08:14 wandboard kernel: [ 140.153803] usb0: MAC 0e:cf:aa:06:aa:8a >> Jun 8 23:08:14 wandboard systemd-udevd[773]: Failed to apply ACL on >> /dev/snd/controlC3: Operation not supported >> Jun 8 23:08:14 wandboard systemd-udevd[776]: Failed to apply ACL on >> /dev/snd/pcmC3D0c: Operation not supported >> Jun 8 23:08:14 wandboard systemd-udevd[775]: Failed to apply ACL on >> /dev/snd/pcmC3D0p: Operation not supported >> Jun 8 23:08:14 wandboard systemd-udevd[773]: Process >> '/usr/sbin/alsactl -E HOME=/var/run/alsa restore 3' failed with exit >> code 99. >> Jun 8 23:08:14 wandboard NetworkManager[359]: <info> devices added >> (path: /sys/devices/soc0/soc/2100000.aips-bus/2184000.usb/ci_hdrc.0/gadget/net/usb0, >> iface: usb0) >> Jun 8 23:08:14 wandboard NetworkManager[359]: <info> device added >> (path: /sys/devices/soc0/soc/2100000.aips-bus/2184000.usb/ci_hdrc.0/gadget/net/usb0, >> iface: usb0): no ifupdown configuration found. >> >> >> Any idea what could be wrong?Is the 'Failed to apply ACL' relavent? > > Sorry, I don't know what that mean, do that mean there is something > wrong with your local codec? No, I'm not trying to use a local codec at all. I'm trying to capture to a .wav file. I'm just getting the above messages that look like this: >> Jun 8 23:08:14 wandboard systemd-udevd[773]: Failed to apply ACL on >> /dev/snd/controlC3: Operation not supported Any idea why that is? It's the UAC2 audio device. Do you get that message in your syslog? Thanks, -Caleb > > -- > > 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
