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 > > 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? -- 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
