[ALSA] usbaudio - Add support for Edirol UA-101

Added support for the Edirol UA-101 (only in high-speed mode) by taking
the quirks for the UA-1000 and change them accordingly. Changes were
made in 'usbaudio.c', 'usbaudio.h', and 'usbquirks.h'
MIDI and recording seem to work perfectly (with JACK), but playback
gives some few glitches. I think that's the mentioned
synchronizing-problem in the UA-1000 quirk ('FIXME: playback must be
synchronized to capture'), so I didn't change that.
ToDo: Adding Mixer-Support for the built-in
control-panel/patch-bay/router.

Signed-off-by: Bjoern Fay <mail@bfay.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/usb/usbaudio.c

@@ -3077,6 +3077,58 @@ static int create_ua1000_quirk(struct snd_usb_audio *chip,
 	return 0;
 }
 
+/*
+ * Create a stream for an Edirol UA-101 interface.
+ * Copy, paste and modify from Edirol UA-1000
+ */
+static int create_ua101_quirk(struct snd_usb_audio *chip,
+			       struct usb_interface *iface,
+			       const struct snd_usb_audio_quirk *quirk)
+{
+	static const struct audioformat ua101_format = {
+		.format = SNDRV_PCM_FORMAT_S32_LE,
+		.fmt_type = USB_FORMAT_TYPE_I,
+		.altsetting = 1,
+		.altset_idx = 1,
+		.attributes = 0,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+	};
+	struct usb_host_interface *alts;
+	struct usb_interface_descriptor *altsd;
+	struct audioformat *fp;
+	int stream, err;
+
+	if (iface->num_altsetting != 2)
+		return -ENXIO;
+	alts = &iface->altsetting[1];
+	altsd = get_iface_desc(alts);
+	if (alts->extralen != 18 || alts->extra[1] != USB_DT_CS_INTERFACE ||
+	    altsd->bNumEndpoints != 1)
+		return -ENXIO;
+
+	fp = kmemdup(&ua101_format, sizeof(*fp), GFP_KERNEL);
+	if (!fp)
+		return -ENOMEM;
+
+	fp->channels = alts->extra[11];
+	fp->iface = altsd->bInterfaceNumber;
+	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
+	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+	fp->rate_max = fp->rate_min = combine_triple(&alts->extra[15]);
+
+	stream = (fp->endpoint & USB_DIR_IN)
+		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+	err = add_audio_endpoint(chip, stream, fp);
+	if (err < 0) {
+		kfree(fp);
+		return err;
+	}
+	/* FIXME: playback must be synchronized to capture */
+	usb_set_interface(chip->dev, fp->iface, 0);
+	return 0;
+}
+
 static int snd_usb_create_quirk(struct snd_usb_audio *chip,
 				struct usb_interface *iface,
 				const struct snd_usb_audio_quirk *quirk);
@@ -3258,6 +3310,7 @@ static int snd_usb_create_quirk(struct snd_usb_audio *chip,
 		[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,
 	};
 
 	if (quirk->type < QUIRK_TYPE_COUNT) {

sound/usb/usbaudio.h

@@ -159,6 +159,7 @@ enum quirk_type {
 	QUIRK_AUDIO_FIXED_ENDPOINT,
 	QUIRK_AUDIO_EDIROL_UA700_UA25,
 	QUIRK_AUDIO_EDIROL_UA1000,
+	QUIRK_AUDIO_EDIROL_UA101,
 
 	QUIRK_TYPE_COUNT
 };

sound/usb/usbquirks.h

@@ -1098,7 +1098,37 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		}
 	}
 },
-	/* TODO: add Edirol UA-101 support */
+/* Roland UA-101 in High-Speed Mode only */
+{
+	USB_DEVICE(0x0582, 0x007d),
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		.vendor_name = "Roland",
+		.product_name = "UA-101",
+		.ifnum = QUIRK_ANY_INTERFACE,
+		.type = QUIRK_COMPOSITE,
+		.data = (const struct snd_usb_audio_quirk[]) {
+			{
+				.ifnum = 0,
+				.type = QUIRK_AUDIO_EDIROL_UA101
+			},
+			{
+				.ifnum = 1,
+				.type = QUIRK_AUDIO_EDIROL_UA101
+			},
+			{
+				.ifnum = 2,
+				.type = QUIRK_MIDI_FIXED_ENDPOINT,
+				.data = & (const struct snd_usb_midi_endpoint_info) {
+					.out_cables = 0x0001,
+					.in_cables  = 0x0001
+				}
+			},
+			{
+				.ifnum = -1
+			}
+		}
+	}
+},
 {
 	/* has ID 0x0081 when not in "Advanced Driver" mode */
 	USB_DEVICE(0x0582, 0x0080),