[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>

1 files changed, 53 insertions, 0 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 8fd37596e3a1..4dfb91d4398a 100644
--- a/sound/usb/usbaudio.c
+++ b/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) {