ALSA: usb-audio: Add Audio Advantage Micro II

This patch is adding extensive support (beside standard usb audio class)
for Audio Advantage Micro II usb sound card.
Features included:
- Access to AES bits (so now sending the IEC61937 compliant stream is
possible).
- Mixer SPDIF control added to turn on/off the optical transmitter.

Signed-off-by: Przemek Rudy <prudy1@o2.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/mixer_quirks.c

@@ -9,6 +9,8 @@
  *	    Alan Cox (alan@lxorguk.ukuu.org.uk)
  *	    Thomas Sailer (sailer@ife.ee.ethz.ch)
  *
+ *   Audio Advantage Micro II support added by:
+ *	    Przemek Rudy (prudy1@o2.pl)
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -30,6 +32,7 @@
 #include <linux/usb.h>
 #include <linux/usb/audio.h>
 
+#include <sound/asoundef.h>
 #include <sound/core.h>
 #include <sound/control.h>
 #include <sound/hwdep.h>
@@ -1315,6 +1318,211 @@ static struct std_mono_table ebox44_table[] = {
 	{}
 };
 
+/* Audio Advantage Micro II findings:
+ *
+ * Mapping spdif AES bits to vendor register.bit:
+ * AES0: [0 0 0 0 2.3 2.2 2.1 2.0] - default 0x00
+ * AES1: [3.3 3.2.3.1.3.0 2.7 2.6 2.5 2.4] - default: 0x01
+ * AES2: [0 0 0 0 0 0 0 0]
+ * AES3: [0 0 0 0 0 0 x 0] - 'x' bit is set basing on standard usb request
+ *                           (UAC_EP_CS_ATTR_SAMPLE_RATE) for Audio Devices
+ *
+ * power on values:
+ * r2: 0x10
+ * r3: 0x20 (b7 is zeroed just before playback (except IEC61937) and set
+ *           just after it to 0xa0, presumably it disables/mutes some analog
+ *           parts when there is no audio.)
+ * r9: 0x28
+ *
+ * Optical transmitter on/off:
+ * vendor register.bit: 9.1
+ * 0 - on (0x28 register value)
+ * 1 - off (0x2a register value)
+ *
+ */
+static int snd_microii_spdif_info(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+	uinfo->count = 1;
+	return 0;
+}
+
+static int snd_microii_spdif_default_get(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
+	int err;
+	struct usb_interface *iface;
+	struct usb_host_interface *alts;
+	unsigned int ep;
+	unsigned char data[3];
+	int rate;
+
+	ucontrol->value.iec958.status[0] = kcontrol->private_value & 0xff;
+	ucontrol->value.iec958.status[1] = (kcontrol->private_value >> 8) & 0xff;
+	ucontrol->value.iec958.status[2] = 0x00;
+
+	/* use known values for that card: interface#1 altsetting#1 */
+	iface = usb_ifnum_to_if(mixer->chip->dev, 1);
+	alts = &iface->altsetting[1];
+	ep = get_endpoint(alts, 0)->bEndpointAddress;
+
+	err = snd_usb_ctl_msg(mixer->chip->dev,
+			usb_rcvctrlpipe(mixer->chip->dev, 0),
+			UAC_GET_CUR,
+			USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_IN,
+			UAC_EP_CS_ATTR_SAMPLE_RATE << 8,
+			ep,
+			data,
+			sizeof(data));
+	if (err < 0)
+		goto end;
+
+	rate = data[0] | (data[1] << 8) | (data[2] << 16);
+	ucontrol->value.iec958.status[3] = (rate == 48000) ?
+			IEC958_AES3_CON_FS_48000 : IEC958_AES3_CON_FS_44100;
+
+	err = 0;
+end:
+	return err;
+}
+
+static int snd_microii_spdif_default_put(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
+	int err;
+	u8 reg;
+	unsigned long priv_backup = kcontrol->private_value;
+
+	reg = ((ucontrol->value.iec958.status[1] & 0x0f) << 4) |
+			(ucontrol->value.iec958.status[0] & 0x0f);
+	err = snd_usb_ctl_msg(mixer->chip->dev,
+			usb_sndctrlpipe(mixer->chip->dev, 0),
+			UAC_SET_CUR,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+			reg,
+			2,
+			NULL,
+			0);
+	if (err < 0)
+		goto end;
+
+	kcontrol->private_value &= 0xfffff0f0;
+	kcontrol->private_value |= (ucontrol->value.iec958.status[1] & 0x0f) << 8;
+	kcontrol->private_value |= (ucontrol->value.iec958.status[0] & 0x0f);
+
+	reg = (ucontrol->value.iec958.status[0] & IEC958_AES0_NONAUDIO) ?
+			0xa0 : 0x20;
+	reg |= (ucontrol->value.iec958.status[1] >> 4) & 0x0f;
+	err = snd_usb_ctl_msg(mixer->chip->dev,
+			usb_sndctrlpipe(mixer->chip->dev, 0),
+			UAC_SET_CUR,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+			reg,
+			3,
+			NULL,
+			0);
+	if (err < 0)
+		goto end;
+
+	kcontrol->private_value &= 0xffff0fff;
+	kcontrol->private_value |= (ucontrol->value.iec958.status[1] & 0xf0) << 8;
+
+	/* The frequency bits in AES3 cannot be set via register access. */
+
+	/* Silently ignore any bits from the request that cannot be set. */
+
+	err = (priv_backup != kcontrol->private_value);
+end:
+	return err;
+}
+
+static int snd_microii_spdif_mask_get(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	ucontrol->value.iec958.status[0] = 0x0f;
+	ucontrol->value.iec958.status[1] = 0xff;
+	ucontrol->value.iec958.status[2] = 0x00;
+	ucontrol->value.iec958.status[3] = 0x00;
+
+	return 0;
+}
+
+static int snd_microii_spdif_switch_get(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	ucontrol->value.integer.value[0] = !(kcontrol->private_value & 0x02);
+
+	return 0;
+}
+
+static int snd_microii_spdif_switch_put(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
+	int err;
+	u8 reg = ucontrol->value.integer.value[0] ? 0x28 : 0x2a;
+
+	err = snd_usb_ctl_msg(mixer->chip->dev,
+			usb_sndctrlpipe(mixer->chip->dev, 0),
+			UAC_SET_CUR,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+			reg,
+			9,
+			NULL,
+			0);
+
+	if (!err) {
+		err = (reg != (kcontrol->private_value & 0x0ff));
+		if (err)
+			kcontrol->private_value = reg;
+	}
+
+	return err;
+}
+
+static struct snd_kcontrol_new snd_microii_mixer_spdif[] = {
+	{
+		.iface =    SNDRV_CTL_ELEM_IFACE_PCM,
+		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+		.info =     snd_microii_spdif_info,
+		.get =      snd_microii_spdif_default_get,
+		.put =      snd_microii_spdif_default_put,
+		.private_value = 0x00000100UL,/* reset value */
+	},
+	{
+		.access =   SNDRV_CTL_ELEM_ACCESS_READ,
+		.iface =    SNDRV_CTL_ELEM_IFACE_PCM,
+		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
+		.info =     snd_microii_spdif_info,
+		.get =      snd_microii_spdif_mask_get,
+	},
+	{
+		.iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
+		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, SWITCH),
+		.info =     snd_ctl_boolean_mono_info,
+		.get =      snd_microii_spdif_switch_get,
+		.put =      snd_microii_spdif_switch_put,
+		.private_value = 0x00000028UL,/* reset value */
+	}
+};
+
+static int snd_microii_controls_create(struct usb_mixer_interface *mixer)
+{
+	int err, i;
+
+	for (i = 0; i < ARRAY_SIZE(snd_microii_mixer_spdif); ++i) {
+		err = snd_ctl_add(mixer->chip->card,
+			snd_ctl_new1(&snd_microii_mixer_spdif[i], mixer));
+		if (err < 0)
+			return err;
+	}
+
+	return err;
+}
+
 int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
 {
 	int err = 0;
@@ -1353,6 +1561,10 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
 		err = snd_xonar_u1_controls_create(mixer);
 		break;
 
+	case USB_ID(0x0d8c, 0x0103): /* Audio Advantage Micro II */
+		err = snd_microii_controls_create(mixer);
+		break;
+
 	case USB_ID(0x17cc, 0x1011): /* Traktor Audio 6 */
 		err = snd_nativeinstruments_create_mixer(mixer,
 				snd_nativeinstruments_ta6_mixers,

sound/usb/quirks-table.h

@@ -3119,4 +3119,16 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 	}
 },
 
+{
+	/*
+	 * The original product_name is "USB Sound Device", however this name
+	 * is also used by the CM106 based cards, so make it unique.
+	 */
+	USB_DEVICE(0x0d8c, 0x0103),
+	.driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+		.product_name = "Audio Advantage MicroII",
+		.ifnum = QUIRK_NO_INTERFACE
+	}
+},
+
 #undef USB_DEVICE_VENDOR_SPEC