At Wed, 17 Feb 2010 12:26:15 -0600, Chris J Arges wrote:

This minimal patch has been tested on my laptop and currently output only works. This patch is based off of code that Clemens Ladisch posted on the alsa-devel mailing list way back in 2004.

Applied now. Thanks.

Takashi

--chris j arges [2 0001-ALSA-usbaudio-Mbox-support-output-only.patch <text/x-patch; UTF-8 (7bit)>]

...

From d079f1d7298d06597fa7d4c3c4aa8979864342ac Mon Sep 17 00:00:00 2001

From: Chris J Arges christopherarges@gmail.com Date: Wed, 17 Feb 2010 12:12:52 -0600 Subject: [PATCH] ALSA: usbaudio Mbox support, output only

Signed-off-by: Chris J Arges christopherarges@gmail.com

---

sound/usb/usbquirks.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/sound/usb/usbquirks.h b/sound/usb/usbquirks.h index e691eba..14552d2 100644 --- a/sound/usb/usbquirks.h +++ b/sound/usb/usbquirks.h @@ -2215,6 +2215,51 @@ YAMAHA_DEVICE(0x7010, "UB99"), } },

+/* Digidesign Mbox */ +{

• /* Thanks to Clemens Ladisch clemens@ladisch.de */
• USB_DEVICE(0x0dba, 0x1000),
• .driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {

• .vendor_name = "Digidesign",
  

• .product_name = "MBox",
  

• .ifnum = QUIRK_ANY_INTERFACE,
  

• .type = QUIRK_COMPOSITE,
  

• .data = (const struct snd_usb_audio_quirk[]){
  

• 	{
  

• 		.ifnum = 0,
  

• 		.type = QUIRK_IGNORE_INTERFACE,
  

• 	},
  

• 	{
  

• 		.ifnum = 1,
  

• 		.type = QUIRK_AUDIO_FIXED_ENDPOINT,
  

• 		.data = &(const struct audioformat) {
  

• 			.format = SNDRV_PCM_FORMAT_S24_3BE,
  

• 			.channels = 2,
  

• 			.iface = 1,
  

• 			.altsetting = 1,
  

• 			.altset_idx = 1,
  

• 			.attributes = EP_CS_ATTR_SAMPLE_RATE,
  

• 			.endpoint = 0x02,
  

• 			.ep_attr = 0x01,
  

• 			.maxpacksize = 0x130,
  

• 			.rates = SNDRV_PCM_RATE_44100 |
  

• 				 SNDRV_PCM_RATE_48000,
  

• 			.rate_min = 44100,
  

• 			.rate_max = 48000,
  

• 			.nr_rates = 2,
  

• 			.rate_table = (unsigned int[]) {
  

• 				44100, 48000
  

• 			}
  

• 		}
  

• 	},
  

• 	{
  

• 		.ifnum = -1
  

• 	}
  

• }
  

• }

+},

{ /* * Some USB MIDI devices don't have an audio control interface, -- 1.6.3.3