ALSA: usb-audio: add support for many Roland/Yamaha devices

Add quirks to detect the various vendor-specific descriptors used by
Roland and Yamaha in most of their recent USB audio and MIDI devices.

Together with the previous patch, this should add audio/MIDI support for
the following USB devices:
- Edirol motion dive .tokyo performance package
- Roland MC-808 Synthesizer
- Roland BK-7m Synthesizer
- Roland VIMA JM-5/8 Synthesizer
- Roland SP-555 Sequencer
- Roland V-Synth GT Synthesizer
- Roland Music Atelier AT-75/100/300/350C/500/800/900/900C Organ
- Edirol V-Mixer M-200i/300/380/400/480/R-1000
- BOSS GT-10B Effects Processor
- Roland Fantom G6/G7/G8 Keyboard
- Cakewalk Sonar V-Studio 20/100/700 Audio Interface
- Roland GW-8 Keyboard
- Roland AX-Synth Keyboard
- Roland JUNO-Di/STAGE/Gi Keyboard
- Roland VB-99 Effects Processor
- Cakewalk UM-2G MIDI Interface
- Roland A-500S Keyboard
- Roland SD-50 Synthesizer
- Roland OCTAPAD SPD-30 Controller
- Roland Lucina AX-09 Synthesizer
- BOSS BR-800 Digital Recorder
- Roland DUO/TRI-CAPTURE (EX) Audio Interface
- BOSS RC-300 Loop Station
- Roland JUPITER-50/80 Keyboard
- Roland R-26 Recorder
- Roland SPD-SX Controller
- BOSS JS-10 Audio Player
- Roland TD-11/15/30 Drum Module
- Roland A-49/88 Keyboard
- Roland INTEGRA-7 Synthesizer
- Roland R-88 Recorder

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

1 files changed, 12 insertions, 3 deletions

diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 1ea5871cb980..c4339f97226b 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -493,10 +493,10 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
                 altsd = get_iface_desc(alts);
                 protocol = altsd->bInterfaceProtocol;
                 /* skip invalid one */
-                if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
+                if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
+                      (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
+                       altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
                      altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
-                    (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
-                     altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
                     altsd->bNumEndpoints < 1 ||
                     le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
                         continue;
@@ -512,6 +512,15 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
                 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
                         continue;
 
+                /*
+                 * Roland audio streaming interfaces are marked with protocols
+                 * 0/1/2, but are UAC 1 compatible.
+                 */
+                if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
+                    altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
+                    protocol <= 2)
+                        protocol = UAC_VERSION_1;
+
                 chconfig = 0;
                 /* get audio formats */
                 switch (protocol) {