From: Paul Bonser <misterpib@gmail.com>
Date: Thu, 8 Jan 2015 05:34:16 +0000 (-0600)
Subject: ALSA: usb-audio: Add support for Akai MPC Element USB MIDI controller
X-Git-Tag: firefly_0821_release~176^2~2367^2~63
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e9f49369722bd7dd53f90467196df4b952eac1b6;p=firefly-linux-kernel-4.4.55.git

ALSA: usb-audio: Add support for Akai MPC Element USB MIDI controller

The Akai MPC Element incorrectly reports its bInterfaceClass as 255, but
otherwise implements the USB MIDI spec correctly.

This adds a quirks-table.h entry which allows the device to be
recognized as a standard USB MIDI device.

Signed-off-by: Paul Bonser <misterpib@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index 0a598af9b38b..67d476548dcf 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -2486,6 +2486,28 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 	}
 },
 
+{
+	/* Akai MPC Element */
+	USB_DEVICE(0x09e8, 0x0021),
+	.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_IGNORE_INTERFACE
+			},
+			{
+				.ifnum = 1,
+				.type = QUIRK_MIDI_STANDARD_INTERFACE
+			},
+			{
+				.ifnum = -1
+			}
+		}
+	}
+},
+
 /* TerraTec devices */
 {
 	USB_DEVICE_VENDOR_SPEC(0x0ccd, 0x0012),