1 files changed, 72 insertions, 0 deletions

diff --git a/sound/i2c/other/ak4xxx-adda.c b/sound/i2c/other/ak4xxx-adda.c
index 7d562f084207..d76d8b078a81 100644
--- a/sound/i2c/other/ak4xxx-adda.c
+++ b/sound/i2c/other/ak4xxx-adda.c
@@ -472,6 +472,57 @@ static int snd_akm4xxx_deemphasis_put(struct snd_kcontrol *kcontrol,
         return change;
 }
 
+static int ak4xxx_switch_info(struct snd_kcontrol *kcontrol,
+                              struct snd_ctl_elem_info *uinfo)
+{
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+        uinfo->count = 1;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = 1;
+        return 0;
+}
+
+static int ak4xxx_switch_get(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
+        int chip = AK_GET_CHIP(kcontrol->private_value);
+        int addr = AK_GET_ADDR(kcontrol->private_value);
+        int shift = AK_GET_SHIFT(kcontrol->private_value);
+        int invert = AK_GET_INVERT(kcontrol->private_value);
+        unsigned char val = snd_akm4xxx_get(ak, chip, addr);
+
+        if (invert)
+                val = ! val;
+        ucontrol->value.integer.value[0] = (val & (1<<shift)) != 0;
+        return 0;
+}
+
+static int ak4xxx_switch_put(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
+        int chip = AK_GET_CHIP(kcontrol->private_value);
+        int addr = AK_GET_ADDR(kcontrol->private_value);
+        int shift = AK_GET_SHIFT(kcontrol->private_value);
+        int invert = AK_GET_INVERT(kcontrol->private_value);
+        long flag = ucontrol->value.integer.value[0];
+        unsigned char val, oval;
+        int change;
+
+        if (invert)
+                flag = ! flag;
+        oval = snd_akm4xxx_get(ak, chip, addr);
+        if (flag)
+                val = oval | (1<<shift);
+        else
+                val = oval & ~(1<<shift);
+        change = (oval != val);
+        if (change)
+                snd_akm4xxx_write(ak, chip, addr, val);
+        return change;
+}
+
 /*
  * build AK4xxx controls
  */
@@ -621,6 +672,27 @@ int snd_akm4xxx_build_controls(struct snd_akm4xxx *ak)
                                               SNDRV_CTL_ELEM_ACCESS_WRITE));
                 if (err < 0)
                         goto __error;
+
+                memset(ctl, 0, sizeof(*ctl));
+                if (ak->channel_names == NULL)
+                        strcpy(ctl->id.name, "Capture Switch");
+                else
+                        strcpy(ctl->id.name, ak->channel_names[1]);
+                ctl->id.index = ak->idx_offset * 2;
+                ctl->id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+                ctl->count = 1;
+                ctl->info = ak4xxx_switch_info;
+                ctl->get = ak4xxx_switch_get;
+                ctl->put = ak4xxx_switch_put;
+                /* register 2, bit 0 (SMUTE): 0 = normal operation, 1 = mute */
+                ctl->private_value =
+                        AK_COMPOSE(0, 2, 0, 0) | AK_INVERT;
+                ctl->private_data = ak;
+                err = snd_ctl_add(ak->card,
+                                  snd_ctl_new(ctl, SNDRV_CTL_ELEM_ACCESS_READ|
+                                              SNDRV_CTL_ELEM_ACCESS_WRITE));
+                if (err < 0)
+                        goto __error;
         }
 
         if (ak->type == SND_AK4355 || ak->type == SND_AK4358)