I'm trying to use a USB Audio Class device with my Galaxy Nexus in Host Mode. I'd like to use both the audio and GPIO/I2C functions of the chipset. My understanding is that the Android kernel will not support Audio through USB (without rooting the phone).
However, based on this post, it looks like I can write a soft driver for an arbitrary USB device if I can grab it by its VID and PID. Perhaps I can even play some audio from my application using the isochronous endpoint.. Is this possible? Too bad Isochronous endpoints are currently unsupported.
When I connect my device and use dmesg, I see device vXXXX pXXXX is not supported. What does that indicate?
What if my USB device sometimes fails to enumerate (see below)? Is that likely a hardware issue?
<6>[ 262.061309] usb 2-1: new full speed USB device number 5 using musb-hdrc
<3>[ 262.123870] hub 2-0:1.0: unable to enumerate USB device on port 1
<6>[ 262.483215] usb 2-1: new full speed USB device number 6 using musb-hdrc
<3>[ 262.631652] usb 2-1: device descriptor read/all, error -19
<3>[ 262.694183] hub 2-0:1.0: unable to enumerate USB device on port 1
<6>[ 263.053558] usb 2-1: new full speed USB device number 8 using musb-hdrc
<3>[ 268.608215] usb 2-1: device not accepting address 8, error -110
<3>[ 268.670715] hub 2-0:1.0: unable to enumerate USB device on port 1
