Re: [Alsa-user] How to install usb Maudio Micro "Couldn't open device, some information will be missing "

[pukul s. <nie...@gm...>]

Thanks Torstein for information, I am new be on linux world , how to
add entry for quirks-table.h ?

On 5/26/13, Torstein Hegge <he...@re...> wrote:
> On Sun, May 26, 2013 at 13:29:33 +0700, pukul sesuatu wrote:
>> Hi All , how to install maudio micro on raspberry pi, I am try to
>> install and googling for found some information about installing
>> Maudio micro on raspberry pi but very little information about that.
>> so I need help from you guys how to install it?
>> this my ouput on terminal . thanks you
>> ===================================
>> lsusb -v -d 0763:201a
>>
>>
>> Bus 001 Device 012: ID 0763:201a Midiman M-Audio Micro
>> Couldn't open device, some information will be missing
>
> That is a permission error from lsusb, run lsusb with sudo to get rid of
> it. I don't think it will affect the lsusb output in this case.
>
>> Device Descriptor:
>>   bDeviceClass          255 Vendor Specific Class
>
> The device needs a quirk in order to be recognized by snd_usb_audio, but
> the
> rest of the descriptors look standard.
>
> You can try to add an entry like this in quirks-table.h
>
> {
> 	USB_DEVICE(0x0763, 0x201a),
> 	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
> 		/* .vendor_name = "M-Audio", */
> 		/* .product_name = "Micro", */
> 		.ifnum = QUIRK_ANY_INTERFACE,
> 		.type = QUIRK_COMPOSITE,
> 		.data = & (const struct snd_usb_audio_quirk[]) {
> 			{
> 				/* Control device */
> 				.ifnum = 0,
> 				.type = QUIRK_IGNORE_INTERFACE
> 			},
> 			{
> 				.ifnum = 1,
> 				.type = QUIRK_AUDIO_STANDARD_INTERFACE
> 			},
> 			{
> 				.ifnum = 2,
> 				.type = QUIRK_AUDIO_STANDARD_INTERFACE
> 			},
> 			{
> 				.ifnum = -1
> 			}
> 		}
> 	}
> },
>