ALSA: oxygen: X-Meridian: add S/PDIF source selection

Add a mixer control to select between the on-board and extension board
S/PDIF inputs for the X-Meridian (2G).

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 75 insertions, 2 deletions

diff --git a/sound/pci/oxygen/oxygen.c b/sound/pci/oxygen/oxygen.c
index 45427d85045e..22cbf3e67ac4 100644
--- a/sound/pci/oxygen/oxygen.c
+++ b/sound/pci/oxygen/oxygen.c
@@ -28,7 +28,13 @@
  *
  *   GPIO 0 -> DFS0 of AK5385
  *   GPIO 1 -> DFS1 of AK5385
- *   GPIO 8 -> enable headphone amplifier on HT-Omega models
+ *
+ * X-Meridian models:
+ *   GPIO 4 -> enable extension S/PDIF input
+ *   GPIO 6 -> enable on-board S/PDIF input
+ *
+ * Claro models:
+ *   GPIO 8 -> enable headphone amplifier
  *
  * CM9780:
  *
@@ -124,6 +130,10 @@ MODULE_DEVICE_TABLE(pci, oxygen_ids);
 #define GPIO_AK5385_DFS_DOUBLE  0x0001
 #define GPIO_AK5385_DFS_QUAD    0x0002
 
+#define GPIO_MERIDIAN_DIG_MASK  0x0050
+#define GPIO_MERIDIAN_DIG_EXT   0x0010
+#define GPIO_MERIDIAN_DIG_BOARD 0x0040
+
 #define GPIO_CLARO_HP           0x0100
 
 struct generic_data {
@@ -238,6 +248,10 @@ static void generic_init(struct oxygen *chip)
 
 static void meridian_init(struct oxygen *chip)
 {
+        oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL,
+                          GPIO_MERIDIAN_DIG_MASK);
+        oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
+                              GPIO_MERIDIAN_DIG_BOARD, GPIO_MERIDIAN_DIG_MASK);
         ak4396_init(chip);
         ak5385_init(chip);
 }
@@ -506,6 +520,51 @@ static const struct snd_kcontrol_new hpf_control = {
         .put = hpf_put,
 };
 
+static int meridian_dig_source_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info)
+{
+        static const char *const names[2] = { "On-board", "Extension" };
+
+        return snd_ctl_enum_info(info, 1, 2, names);
+}
+
+static int meridian_dig_source_get(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)
+{
+        struct oxygen *chip = ctl->private_data;
+
+        value->value.enumerated.item[0] =
+                !!(oxygen_read16(chip, OXYGEN_GPIO_DATA) &
+                   GPIO_MERIDIAN_DIG_EXT);
+        return 0;
+}
+
+static int meridian_dig_source_put(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)
+{
+        struct oxygen *chip = ctl->private_data;
+        u16 old_reg, new_reg;
+        int changed;
+
+        mutex_lock(&chip->mutex);
+        old_reg = oxygen_read16(chip, OXYGEN_GPIO_DATA);
+        new_reg = old_reg & ~GPIO_MERIDIAN_DIG_MASK;
+        if (value->value.enumerated.item[0] == 0)
+                new_reg |= GPIO_MERIDIAN_DIG_BOARD;
+        else
+                new_reg |= GPIO_MERIDIAN_DIG_EXT;
+        changed = new_reg != old_reg;
+        if (changed)
+                oxygen_write16(chip, OXYGEN_GPIO_DATA, new_reg);
+        mutex_unlock(&chip->mutex);
+        return changed;
+}
+
+static const struct snd_kcontrol_new meridian_dig_source_control = {
+        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+        .name = "IEC958 Source Capture Enum",
+        .info = meridian_dig_source_info,
+        .get = meridian_dig_source_get,
+        .put = meridian_dig_source_put,
+};
+
 static int generic_mixer_init(struct oxygen *chip)
 {
         return snd_ctl_add(chip->card, snd_ctl_new1(&rolloff_control, chip));
@@ -524,6 +583,20 @@ static int generic_wm8785_mixer_init(struct oxygen *chip)
         return 0;
 }
 
+static int meridian_mixer_init(struct oxygen *chip)
+{
+        int err;
+
+        err = generic_mixer_init(chip);
+        if (err < 0)
+                return err;
+        err = snd_ctl_add(chip->card,
+                          snd_ctl_new1(&meridian_dig_source_control, chip));
+        if (err < 0)
+                return err;
+        return 0;
+}
+
 static void dump_ak4396_registers(struct oxygen *chip,
                                   struct snd_info_buffer *buffer)
 {
@@ -600,7 +673,7 @@ static int __devinit get_oxygen_model(struct oxygen *chip,
         switch (id->driver_data) {
         case MODEL_MERIDIAN:
                 chip->model.init = meridian_init;
-                chip->model.mixer_init = generic_mixer_init;
+                chip->model.mixer_init = meridian_mixer_init;
                 chip->model.resume = meridian_resume;
                 chip->model.set_adc_params = set_ak5385_params;
                 chip->model.dump_registers = dump_ak4396_registers;