+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,
+};
+