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.
--chris j arges
>From d079f1d7298d06597fa7d4c3c4aa8979864342ac Mon Sep 17 00:00:00 2001
From: Chris J Arges <christopherarges@xxxxxxxxx>
Date: Wed, 17 Feb 2010 12:12:52 -0600
Subject: [PATCH] ALSA: usbaudio Mbox support, output only
Signed-off-by: Chris J Arges <christopherarges@xxxxxxxxx>
---
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@xxxxxxxxxx> */
+ 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
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