ALSA: usb-audio: add support for M-Audio FT C600

Adds quirks and mixer support for the M-Audio Fast Track C600 USB
audio interface. This device is very similar to the C400 - the C600
simply has some more inputs and outputs, so the existing C400 support
is extended to support this device as well.

Signed-off-by: Matt Gruskin <[e-mail]>
Signed-off-by: Takashi Iwai <[e-mail]>

sound/usb/mixer.c

···
 {
 	switch (cval->mixer->chip->usb_id) {
 	case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+	case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
 		if (strcmp(kctl->id.name, "Effect Duration") == 0) {
 			cval->min = 0x0000;
 			cval->max = 0xffff;

sound/usb/mixer_maps.c

···
 		.selector_map = c400_selectors,
 	},
 	{
+		.id = USB_ID(0x0763, 0x2031),
+		.selector_map = c400_selectors,
+	},
+	{
 		.id = USB_ID(0x08bb, 0x2702),
 		.map = linex_map,
 		.ignore_ctl_error = 1,

sound/usb/mixer_quirks.c

···
 }
 
 /* M-Audio FastTrack Ultra quirks */
-/* FTU Effect switch (also used by C400) */
+/* FTU Effect switch (also used by C400/C600) */
 struct snd_ftu_eff_switch_priv_val {
 	struct usb_mixer_interface *mixer;
 	int cached_value;
···
 	}
 }
 
-/* M-Audio Fast Track C400 */
-/* C400 volume controls, this control needs a volume quirk, see mixer.c */
+/* M-Audio Fast Track C400/C600 */
+/* C400/C600 volume controls, this control needs a volume quirk, see mixer.c */
 static int snd_c400_create_vol_ctls(struct usb_mixer_interface *mixer)
 {
 	char name[64];
 	unsigned int cmask, offset;
 	int out, chan, err;
+	int num_outs = 0;
+	int num_ins = 0;
 
 	const unsigned int id = 0x40;
 	const int val_type = USB_MIXER_S16;
 	const int control = 1;
 
-	for (chan = 0; chan < 10; chan++) {
-		for (out = 0; out < 6; out++) {
-			if (chan < 6) {
+	switch (mixer->chip->usb_id) {
+	case USB_ID(0x0763, 0x2030):
+		num_outs = 6;
+		num_ins = 4;
+		break;
+	case USB_ID(0x0763, 0x2031):
+		num_outs = 8;
+		num_ins = 6;
+		break;
+	}
+
+	for (chan = 0; chan < num_outs + num_ins; chan++) {
+		for (out = 0; out < num_outs; out++) {
+			if (chan < num_outs) {
 				snprintf(name, sizeof(name),
 					"PCM%d-Out%d Playback Volume",
 					chan + 1, out + 1);
 			} else {
 				snprintf(name, sizeof(name),
 					"In%d-Out%d Playback Volume",
-					chan - 5, out + 1);
+					chan - num_outs + 1, out + 1);
 			}
 
 			cmask = (out == 0) ? 0 : 1 << (out - 1);
-			offset = chan * 6;
+			offset = chan * num_outs;
 			err = snd_create_std_mono_ctl_offset(mixer, id, control,
 						cmask, val_type, offset, name,
 						&snd_usb_mixer_vol_tlv);
···
 	char name[64];
 	unsigned int cmask;
 	int chan, err;
+	int num_outs = 0;
+	int num_ins = 0;
 
 	const unsigned int id = 0x42;
 	const int val_type = USB_MIXER_S16;
 	const int control = 1;
 
-	for (chan = 0; chan < 10; chan++) {
-		if (chan < 6) {
+	switch (mixer->chip->usb_id) {
+	case USB_ID(0x0763, 0x2030):
+		num_outs = 6;
+		num_ins = 4;
+		break;
+	case USB_ID(0x0763, 0x2031):
+		num_outs = 8;
+		num_ins = 6;
+		break;
+	}
+
+	for (chan = 0; chan < num_outs + num_ins; chan++) {
+		if (chan < num_outs) {
 			snprintf(name, sizeof(name),
 				"Effect Send DOut%d",
 				chan + 1);
 		} else {
 			snprintf(name, sizeof(name),
 				"Effect Send AIn%d",
-				chan - 5);
+				chan - num_outs + 1);
 		}
 
 		cmask = (chan == 0) ? 0 : 1 << (chan - 1);
···
 	char name[64];
 	unsigned int cmask;
 	int chan, err;
+	int num_outs = 0;
+	int offset = 0;
 
 	const unsigned int id = 0x40;
 	const int val_type = USB_MIXER_S16;
 	const int control = 1;
-	const int chan_id[6] = { 0, 7, 2, 9, 4, 0xb };
-	const unsigned int offset = 0x3c;
-				/* { 0x3c, 0x43, 0x3e, 0x45, 0x40, 0x47 } */
 
-	for (chan = 0; chan < 6; chan++) {
+	switch (mixer->chip->usb_id) {
+	case USB_ID(0x0763, 0x2030):
+		num_outs = 6;
+		offset = 0x3c;
+		/* { 0x3c, 0x43, 0x3e, 0x45, 0x40, 0x47 } */
+		break;
+	case USB_ID(0x0763, 0x2031):
+		num_outs = 8;
+		offset = 0x70;
+		/* { 0x70, 0x79, 0x72, 0x7b, 0x74, 0x7d, 0x76, 0x7f } */
+		break;
+	}
+
+	for (chan = 0; chan < num_outs; chan++) {
 		snprintf(name, sizeof(name),
 			"Effect Return %d",
 			chan + 1);
 
-		cmask = (chan_id[chan] == 0) ? 0 : 1 << (chan_id[chan] - 1);
+		cmask = (chan == 0) ? 0 :
+			1 << (chan + (chan % 2) * num_outs - 1);
 		err = snd_create_std_mono_ctl_offset(mixer, id, control,
 						cmask, val_type, offset, name,
 						&snd_usb_mixer_vol_tlv);
···
 		break;
 
 	case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+	case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C400 */
 		err = snd_c400_create_mixer(mixer);
 		break;
 

sound/usb/pcm.c

···
 
 	switch (subs->stream->chip->usb_id) {
 	case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+	case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
 		if (is_playback) {
 			implicit_fb = 1;
 			ep = 0x81;

sound/usb/quirks-table.h

···
 	}
 },
 {
+	USB_DEVICE_VENDOR_SPEC(0x0763, 0x2031),
+	.driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+		/* .vendor_name = "M-Audio", */
+		/* .product_name = "Fast Track C600", */
+		.ifnum = QUIRK_ANY_INTERFACE,
+		.type = QUIRK_COMPOSITE,
+		.data = &(const struct snd_usb_audio_quirk[]) {
+			{
+				.ifnum = 1,
+				.type = QUIRK_AUDIO_STANDARD_MIXER,
+			},
+			/* Playback */
+			{
+				.ifnum = 2,
+				.type = QUIRK_AUDIO_FIXED_ENDPOINT,
+				.data = &(const struct audioformat) {
+					.formats = SNDRV_PCM_FMTBIT_S24_3LE,
+					.channels = 8,
+					.iface = 2,
+					.altsetting = 1,
+					.altset_idx = 1,
+					.attributes = UAC_EP_CS_ATTR_SAMPLE_RATE,
+					.endpoint = 0x01,
+					.ep_attr = 0x09,
+					.rates = SNDRV_PCM_RATE_44100 |
+						 SNDRV_PCM_RATE_48000 |
+						 SNDRV_PCM_RATE_88200 |
+						 SNDRV_PCM_RATE_96000,
+					.rate_min = 44100,
+					.rate_max = 96000,
+					.nr_rates = 4,
+					.rate_table = (unsigned int[]) {
+							44100, 48000, 88200, 96000
+					},
+					.clock = 0x80,
+				}
+			},
+			/* Capture */
+			{
+				.ifnum = 3,
+				.type = QUIRK_AUDIO_FIXED_ENDPOINT,
+				.data = &(const struct audioformat) {
+					.formats = SNDRV_PCM_FMTBIT_S24_3LE,
+					.channels = 6,
+					.iface = 3,
+					.altsetting = 1,
+					.altset_idx = 1,
+					.attributes = UAC_EP_CS_ATTR_SAMPLE_RATE,
+					.endpoint = 0x81,
+					.ep_attr = 0x05,
+					.rates = SNDRV_PCM_RATE_44100 |
+						 SNDRV_PCM_RATE_48000 |
+						 SNDRV_PCM_RATE_88200 |
+						 SNDRV_PCM_RATE_96000,
+					.rate_min = 44100,
+					.rate_max = 96000,
+					.nr_rates = 4,
+					.rate_table = (unsigned int[]) {
+						44100, 48000, 88200, 96000
+					},
+					.clock = 0x80,
+				}
+			},
+			/* MIDI */
+			{
+				.ifnum = -1 /* Interface = 4 */
+			}
+		}
+	}
+},
+{
 	USB_DEVICE_VENDOR_SPEC(0x0763, 0x2080),
 	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
 		/* .vendor_name = "M-Audio", */

sound/usb/quirks.c

···
 		ep->skip_packets = 4;
 
 	/*
-	 * M-Audio Fast Track C400 - when packets are not skipped, real world
-	 * latency varies by approx. +/- 50 frames (at 96KHz) each time the
-	 * stream is (re)started. When skipping packets 16 at endpoint start
-	 * up, the real world latency is stable within +/- 1 frame (also
+	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
+	 * world latency varies by approx. +/- 50 frames (at 96KHz) each time
+	 * the stream is (re)started. When skipping packets 16 at endpoint
+	 * start up, the real world latency is stable within +/- 1 frame (also
 	 * across power cycles).
 	 */
-	if (ep->chip->usb_id == USB_ID(0x0763, 0x2030) &&
+	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
+	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
 	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
 		ep->skip_packets = 16;
 }