+ idx = ucontrol->value.enumerated.item[0];
+ if (idx >= imux->num_items)
+ idx = imux->num_items - 1;
+
+ spec->mic_boost = idx;
+ if (!spec->dc_enable)
+ cxt5066_set_mic_boost(codec);
+ return 1;
+}
+
+static void cxt5066_enable_dc(struct hda_codec *codec)
+{
+ const struct hda_verb enable_dc_mode[] = {
+ /* disable gain */
+ {0x17, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+
+ /* switch to DC input */
+ {0x17, AC_VERB_SET_CONNECT_SEL, 3},
+ {}
+ };
+
+ /* configure as input source */
+ snd_hda_sequence_write(codec, enable_dc_mode);
+ cxt5066_olpc_select_mic(codec); /* also sets configured bias */
+}
+
+static void cxt5066_disable_dc(struct hda_codec *codec)
+{
+ /* reconfigure input source */
+ cxt5066_set_mic_boost(codec);
+ /* automic also selects the right mic if we're recording */
+ cxt5066_olpc_automic(codec);
+}
+
+static int cxt5066_olpc_dc_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct conexant_spec *spec = codec->spec;
+ ucontrol->value.integer.value[0] = spec->dc_enable;
+ return 0;
+}