ALSA: snd-usb-audio: support for Edirol UA-4FX device

Renamed the old quirk function for ua-700/ua-25 to become more
generic, moving the MIDI interfaces to the quirk data header.
Added a new quirk for the Edirol UA-4FX.
Signed-off-by: Pedro Lopez-Cabanillas <pedro.lopez.cabanillas@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/usb/usbaudio.c

@@ -2997,10 +2997,10 @@ static int create_standard_audio_quirk(struct snd_usb_audio *chip,
 }
 
 /*
- * Create a stream for an Edirol UA-700/UA-25 interface.  The only way
- * to detect the sample rate is by looking at wMaxPacketSize.
+ * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.  
+ * The only way to detect the sample rate is by looking at wMaxPacketSize.
  */
-static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
+static int create_uaxx_quirk(struct snd_usb_audio *chip,
 			      struct usb_interface *iface,
 			      const struct snd_usb_audio_quirk *quirk)
 {
@@ -3017,37 +3017,12 @@ static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
 	struct audioformat *fp;
 	int stream, err;
 
-	/* both PCM and MIDI interfaces have 2 altsettings */
-	if (iface->num_altsetting != 2)
+	/* both PCM and MIDI interfaces have 2 or more altsettings */
+	if (iface->num_altsetting < 2)
 		return -ENXIO;
 	alts = &iface->altsetting[1];
 	altsd = get_iface_desc(alts);
 
-	if (altsd->bNumEndpoints == 2) {
-		static const struct snd_usb_midi_endpoint_info ua700_ep = {
-			.out_cables = 0x0003,
-			.in_cables  = 0x0003
-		};
-		static const struct snd_usb_audio_quirk ua700_quirk = {
-			.type = QUIRK_MIDI_FIXED_ENDPOINT,
-			.data = &ua700_ep
-		};
-		static const struct snd_usb_midi_endpoint_info ua25_ep = {
-			.out_cables = 0x0001,
-			.in_cables  = 0x0001
-		};
-		static const struct snd_usb_audio_quirk ua25_quirk = {
-			.type = QUIRK_MIDI_FIXED_ENDPOINT,
-			.data = &ua25_ep
-		};
-		if (chip->usb_id == USB_ID(0x0582, 0x002b))
-			return snd_usb_create_midi_interface(chip, iface,
-							     &ua700_quirk);
-		else
-			return snd_usb_create_midi_interface(chip, iface,
-							     &ua25_quirk);
-	}
-
 	if (altsd->bNumEndpoints != 1)
 		return -ENXIO;
 
@@ -3377,9 +3352,9 @@ static int snd_usb_create_quirk(struct snd_usb_audio *chip,
 		[QUIRK_MIDI_CME] = snd_usb_create_midi_interface,
 		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
 		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
-		[QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
 		[QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
 		[QUIRK_AUDIO_EDIROL_UA101] = create_ua101_quirk,
+		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk
 	};
 
 	if (quirk->type < QUIRK_TYPE_COUNT) {

sound/usb/usbaudio.h

@@ -159,9 +159,9 @@ enum quirk_type {
 	QUIRK_MIDI_US122L,
 	QUIRK_AUDIO_STANDARD_INTERFACE,
 	QUIRK_AUDIO_FIXED_ENDPOINT,
-	QUIRK_AUDIO_EDIROL_UA700_UA25,
 	QUIRK_AUDIO_EDIROL_UA1000,
 	QUIRK_AUDIO_EDIROL_UA101,
+	QUIRK_AUDIO_EDIROL_UAXX,
 
 	QUIRK_TYPE_COUNT
 };

sound/usb/usbquirks.h

@@ -862,15 +862,19 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		.data = (const struct snd_usb_audio_quirk[]) {
 			{
 				.ifnum = 1,
-				.type = QUIRK_AUDIO_EDIROL_UA700_UA25
+				.type = QUIRK_AUDIO_EDIROL_UAXX
 			},
 			{
 				.ifnum = 2,
-				.type = QUIRK_AUDIO_EDIROL_UA700_UA25
+				.type = QUIRK_AUDIO_EDIROL_UAXX
 			},
 			{
 				.ifnum = 3,
-				.type = QUIRK_AUDIO_EDIROL_UA700_UA25
+				.type = QUIRK_MIDI_FIXED_ENDPOINT,
+				.data = & (const struct snd_usb_midi_endpoint_info) {
+					.out_cables = 0x0003,
+					.in_cables  = 0x0003
+				}
 			},
 			{
 				.ifnum = -1
@@ -1204,15 +1208,19 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		.data = (const struct snd_usb_audio_quirk[]) {
 			{
 				.ifnum = 0,
-				.type = QUIRK_AUDIO_EDIROL_UA700_UA25
+				.type = QUIRK_AUDIO_EDIROL_UAXX
 			},
 			{
 				.ifnum = 1,
-				.type = QUIRK_AUDIO_EDIROL_UA700_UA25
+				.type = QUIRK_AUDIO_EDIROL_UAXX
 			},
 			{
 				.ifnum = 2,
-				.type = QUIRK_AUDIO_EDIROL_UA700_UA25
+				.type = QUIRK_MIDI_FIXED_ENDPOINT,
+				.data = & (const struct snd_usb_midi_endpoint_info) {
+					.out_cables = 0x0001,
+					.in_cables  = 0x0001
+				}
 			},
 			{
 				.ifnum = -1
@@ -1344,6 +1352,40 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 			.in_cables  = 0x000f
 		}
 	}
+},
+{
+	/*
+	 * This quirk is for the "Advanced Driver" mode. If off, the UA-4FX
+	 * is standard compliant, but has only 16-bit PCM and no MIDI.
+	 */
+	USB_DEVICE(0x0582, 0x00a3),
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		.vendor_name = "EDIROL",
+		.product_name = "UA-4FX",
+		.ifnum = QUIRK_ANY_INTERFACE,
+		.type = QUIRK_COMPOSITE,
+		.data = (const struct snd_usb_audio_quirk[]) {
+			{
+				.ifnum = 0,
+				.type = QUIRK_AUDIO_EDIROL_UAXX
+			},
+			{
+				.ifnum = 1,
+				.type = QUIRK_AUDIO_EDIROL_UAXX
+			},
+			{
+				.ifnum = 2,
+				.type = QUIRK_MIDI_FIXED_ENDPOINT,
+				.data = & (const struct snd_usb_midi_endpoint_info) {
+					.out_cables = 0x0001,
+					.in_cables  = 0x0001
+				}
+			},
+			{
+				.ifnum = -1
+			}
+		}
+	}
 },
 	/* TODO: add Edirol MD-P1 support */
 {