ALSA: snd-usb-6fire: add mute control for analog outputs

Add a mute control for every analog output channel.

Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 96 insertions, 0 deletions

diff --git a/sound/usb/6fire/control.c b/sound/usb/6fire/control.c
index c22cc29e33d7..a2bbf48c6413 100644
--- a/sound/usb/6fire/control.c
+++ b/sound/usb/6fire/control.c
@@ -74,6 +74,14 @@ static void usb6fire_control_output_vol_update(struct control_runtime *rt)
                         }
 }
 
+static void usb6fire_control_output_mute_update(struct control_runtime *rt)
+{
+        struct comm_runtime *comm_rt = rt->chip->comm;
+
+        if (comm_rt)
+                comm_rt->write8(comm_rt, 0x12, 0x0e, ~rt->output_mute);
+}
+
 static void usb6fire_control_line_phono_update(struct control_runtime *rt)
 {
         struct comm_runtime *comm_rt = rt->chip->comm;
@@ -208,6 +216,51 @@ static int usb6fire_control_output_vol_get(struct snd_kcontrol *kcontrol,
         return 0;
 }
 
+static int usb6fire_control_output_mute_put(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
+        unsigned int ch = kcontrol->private_value;
+        u8 old = rt->output_mute;
+        u8 value = 0;
+
+        if (ch > 4) {
+                snd_printk(KERN_ERR PREFIX "Invalid channel in volume control.");
+                return -EINVAL;
+        }
+
+        rt->output_mute &= ~(3 << ch);
+        if (ucontrol->value.integer.value[0])
+                value |= 1;
+        if (ucontrol->value.integer.value[1])
+                value |= 2;
+        rt->output_mute |= value << ch;
+
+        if (rt->output_mute != old)
+                usb6fire_control_output_mute_update(rt);
+
+        return rt->output_mute != old;
+}
+
+static int usb6fire_control_output_mute_get(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
+        unsigned int ch = kcontrol->private_value;
+        u8 value = rt->output_mute >> ch;
+
+        if (ch > 4) {
+                snd_printk(KERN_ERR PREFIX "Invalid channel in volume control.");
+                return -EINVAL;
+        }
+
+        ucontrol->value.integer.value[0] = 1 & value;
+        value >>= 1;
+        ucontrol->value.integer.value[1] = 1 & value;
+
+        return 0;
+}
+
 static int usb6fire_control_line_phono_info(struct snd_kcontrol *kcontrol,
                 struct snd_ctl_elem_info *uinfo)
 {
@@ -339,6 +392,40 @@ static struct __devinitdata snd_kcontrol_new vol_elements[] = {
         {}
 };
 
+static struct __devinitdata snd_kcontrol_new mute_elements[] = {
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Playback Switch",
+                .index = 0,
+                .private_value = 0,
+                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+                .info = snd_ctl_boolean_stereo_info,
+                .get = usb6fire_control_output_mute_get,
+                .put = usb6fire_control_output_mute_put,
+        },
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Playback Switch",
+                .index = 1,
+                .private_value = 2,
+                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+                .info = snd_ctl_boolean_stereo_info,
+                .get = usb6fire_control_output_mute_get,
+                .put = usb6fire_control_output_mute_put,
+        },
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Playback Switch",
+                .index = 2,
+                .private_value = 4,
+                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+                .info = snd_ctl_boolean_stereo_info,
+                .get = usb6fire_control_output_mute_get,
+                .put = usb6fire_control_output_mute_put,
+        },
+        {}
+};
+
 static struct __devinitdata snd_kcontrol_new elements[] = {
         {
                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -430,13 +517,21 @@ int __devinit usb6fire_control_init(struct sfire_chip *chip)
         usb6fire_control_opt_coax_update(rt);
         usb6fire_control_line_phono_update(rt);
         usb6fire_control_output_vol_update(rt);
+        usb6fire_control_output_mute_update(rt);
         usb6fire_control_streaming_update(rt);
 
         ret = usb6fire_control_add_virtual(rt, chip->card,
                 "Master Playback Volume", vol_elements);
         if (ret) {
+                snd_printk(KERN_ERR PREFIX "cannot add control.\n");
                 kfree(rt);
+                return ret;
+        }
+        ret = usb6fire_control_add_virtual(rt, chip->card,
+                "Master Playback Switch", mute_elements);
+        if (ret) {
                 snd_printk(KERN_ERR PREFIX "cannot add control.\n");
+                kfree(rt);
                 return ret;
         }
 
diff --git a/sound/usb/6fire/control.h b/sound/usb/6fire/control.h
index ce024113c98f..9f9eb647bc6b 100644
--- a/sound/usb/6fire/control.h
+++ b/sound/usb/6fire/control.h
@@ -45,6 +45,7 @@ struct control_runtime {
         bool usb_streaming;
         u8 output_vol[6];
         u8 ovol_updated;
+        u8 output_mute;
 };
 
 int __devinit usb6fire_control_init(struct sfire_chip *chip);