[alsa-devel] [PATCH v2] ALSA: usb-audio: Add MIDI support for Steinberg MI2/MI4

[Cyrus Harmon]

As long as you're messing around with the quirks table, it would be nice 
to add support for the UR44. This was discussed on the list a while back 
and it wasn't clear why the quirk was needed, but it still seems to be 
needed, at least last I looked.

thanks,

Cyrus

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index 2f6d3e9..ed7875e 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -466,6 +466,36 @@ YAMAHA_DEVICE(0x105d, NULL),
                 }
         }
  },
+{
+       USB_DEVICE(0x0499, 0x150e),
+       .driver_info = (unsigned long) & (const struct 
snd_usb_audio_quirk) {
+               /* .vendor_name = "Yamaha", */
+               /* .product_name = "Steinberg UR44", */
+               .ifnum = QUIRK_ANY_INTERFACE,
+               .type = QUIRK_COMPOSITE,
+               .data = (const struct snd_usb_audio_quirk[]) {
+                       {
+                               .ifnum = 1,
+                               .type = QUIRK_AUDIO_STANDARD_INTERFACE
+                       },
+                       {
+                               .ifnum = 2,
+                               .type = QUIRK_AUDIO_STANDARD_INTERFACE
+                       },
+                       {
+                               .ifnum = 3,
+                               .type = QUIRK_MIDI_YAMAHA
+                       },
+                       {
+                               .ifnum = 4,
+                               .type = QUIRK_IGNORE_INTERFACE
+                       },
+                       {
+                               .ifnum = -1
+                       }
+               }
+       }
+},
  YAMAHA_DEVICE(0x2000, "DGP-7"),
  YAMAHA_DEVICE(0x2001, "DGP-5"),
  YAMAHA_DEVICE(0x2002, NULL),


On 07/01/2015 08:30 AM, Takashi Iwai wrote:
> At Tue, 30 Jun 2015 17:41:33 +0200,
> Dominic Sacré wrote:
>> The Steinberg MI2 and MI4 interfaces are compatible with the USB class
>> audio spec, but the MIDI part of the devices is reported as a vendor
>> specific interface.
>>
>> This patch adds entries to quirks-table.h to recognize the MIDI
>> endpoints. Audio functionality was already working and is unaffected by
>> this change.
>>
>> Signed-off-by: Dominic Sacré <dominic.sacre at gmx.de>
>> Signed-off-by: Albert Huitsing <albert at huitsing.nl>
> Applied now with Clemens' ack, and Cc to stable.
>
>
> thanks,
>
> Takashi
>
>> ---
>>   sound/usb/quirks-table.h | 68 ++++++++++++++++++++++++++++++++++++++++++++++++
>>   1 file changed, 68 insertions(+)
>>
>> diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
>> index 2f6d3e9..e475665 100644
>> --- a/sound/usb/quirks-table.h
>> +++ b/sound/usb/quirks-table.h
>> @@ -2512,6 +2512,74 @@ YAMAHA_DEVICE(0x7010, "UB99"),
>>   	}
>>   },
>>   
>> +/* Steinberg devices */
>> +{
>> +	/* Steinberg MI2 */
>> +	USB_DEVICE_VENDOR_SPEC(0x0a4e, 0x2040),
>> +	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
>> +		.ifnum = QUIRK_ANY_INTERFACE,
>> +		.type = QUIRK_COMPOSITE,
>> +		.data = & (const struct snd_usb_audio_quirk[]) {
>> +			{
>> +				.ifnum = 0,
>> +				.type = QUIRK_AUDIO_STANDARD_INTERFACE
>> +			},
>> +			{
>> +				.ifnum = 1,
>> +				.type = QUIRK_AUDIO_STANDARD_INTERFACE
>> +			},
>> +			{
>> +				.ifnum = 2,
>> +				.type = QUIRK_AUDIO_STANDARD_INTERFACE
>> +			},
>> +			{
>> +				.ifnum = 3,
>> +				.type = QUIRK_MIDI_FIXED_ENDPOINT,
>> +				.data = &(const struct snd_usb_midi_endpoint_info) {
>> +					.out_cables = 0x0001,
>> +					.in_cables  = 0x0001
>> +				}
>> +			},
>> +			{
>> +				.ifnum = -1
>> +			}
>> +		}
>> +	}
>> +},
>> +{
>> +	/* Steinberg MI4 */
>> +	USB_DEVICE_VENDOR_SPEC(0x0a4e, 0x4040),
>> +	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
>> +		.ifnum = QUIRK_ANY_INTERFACE,
>> +		.type = QUIRK_COMPOSITE,
>> +		.data = & (const struct snd_usb_audio_quirk[]) {
>> +			{
>> +				.ifnum = 0,
>> +				.type = QUIRK_AUDIO_STANDARD_INTERFACE
>> +			},
>> +			{
>> +				.ifnum = 1,
>> +				.type = QUIRK_AUDIO_STANDARD_INTERFACE
>> +			},
>> +			{
>> +				.ifnum = 2,
>> +				.type = QUIRK_AUDIO_STANDARD_INTERFACE
>> +			},
>> +			{
>> +				.ifnum = 3,
>> +				.type = QUIRK_MIDI_FIXED_ENDPOINT,
>> +				.data = &(const struct snd_usb_midi_endpoint_info) {
>> +					.out_cables = 0x0001,
>> +					.in_cables  = 0x0001
>> +				}
>> +			},
>> +			{
>> +				.ifnum = -1
>> +			}
>> +		}
>> +	}
>> +},
>> +
>>   /* TerraTec devices */
>>   {
>>   	USB_DEVICE_VENDOR_SPEC(0x0ccd, 0x0012),
>> -- 
>> 2.4.5
>>
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