1 files changed, 190 insertions, 23 deletions

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index 3521f33d43c3..685015a53292 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -117,6 +117,16 @@ struct conexant_spec {
         unsigned int recording;
         void (*capture_prepare)(struct hda_codec *codec);
         void (*capture_cleanup)(struct hda_codec *codec);
+
+        /* OLPC XO-1.5 supports DC input mode (e.g. for use with analog sensors)
+         * through the microphone jack.
+         * When the user enables this through a mixer switch, both internal and
+         * external microphones are disabled. Gain is fixed at 0dB. In this mode,
+         * we also allow the bias to be configured through a separate mixer
+         * control. */
+        unsigned int dc_enable;
+        unsigned int dc_input_bias; /* offset into cxt5066_olpc_dc_bias */
+        unsigned int mic_boost; /* offset into cxt5066_analog_mic_boost */
 };
 
 static int conexant_playback_pcm_open(struct hda_pcm_stream *hinfo,
@@ -2024,6 +2034,26 @@ static int cxt5066_hp_master_sw_put(struct snd_kcontrol *kcontrol,
         return 1;
 }
 
+static const struct hda_input_mux cxt5066_olpc_dc_bias = {
+        .num_items = 3,
+        .items = {
+                { "Off", PIN_IN },
+                { "50%", PIN_VREF50 },
+                { "80%", PIN_VREF80 },
+        },
+};
+
+static int cxt5066_set_olpc_dc_bias(struct hda_codec *codec)
+{
+        struct conexant_spec *spec = codec->spec;
+        /* Even though port F is the DC input, the bias is controlled on port B.
+         * we also leave that port as an active input (but unselected) in DC mode
+         * just in case that is necessary to make the bias setting take effect. */
+        return snd_hda_codec_write_cache(codec, 0x1a, 0,
+                AC_VERB_SET_PIN_WIDGET_CONTROL,
+                cxt5066_olpc_dc_bias.items[spec->dc_input_bias].index);
+}
+
 /* OLPC defers mic widget control until when capture is started because the
  * microphone LED comes on as soon as these settings are put in place. if we
  * did this before recording, it would give the false indication that recording
@@ -2034,6 +2064,27 @@ static void cxt5066_olpc_select_mic(struct hda_codec *codec)
         if (!spec->recording)
                 return;
 
+        if (spec->dc_enable) {
+                /* in DC mode we ignore presence detection and just use the jack
+                 * through our special DC port */
+                const struct hda_verb enable_dc_mode[] = {
+                        /* disble internal mic, port C */
+                        {0x1b, AC_VERB_SET_PIN_WIDGET_CONTROL, 0},
+
+                        /* enable DC capture, port F */
+                        {0x1e, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_IN},
+                        {},
+                };
+
+                snd_hda_sequence_write(codec, enable_dc_mode);
+                /* port B input disabled (and bias set) through the following call */
+                cxt5066_set_olpc_dc_bias(codec);
+                return;
+        }
+
+        /* disable DC (port F) */
+        snd_hda_codec_write(codec, 0x1e, 0, AC_VERB_SET_PIN_WIDGET_CONTROL, 0);
+
         /* external mic, port B */
         snd_hda_codec_write(codec, 0x1a, 0, AC_VERB_SET_PIN_WIDGET_CONTROL,
                 spec->ext_mic_present ? CXT5066_OLPC_EXT_MIC_BIAS : 0);
@@ -2049,6 +2100,9 @@ static void cxt5066_olpc_automic(struct hda_codec *codec)
         struct conexant_spec *spec = codec->spec;
         unsigned int present;
 
+        if (spec->dc_enable) /* don't do presence detection in DC mode */
+                return;
+
         present = snd_hda_codec_read(codec, 0x1a, 0,
                                      AC_VERB_GET_PIN_SENSE, 0) & 0x80000000;
         if (present)
@@ -2123,13 +2177,16 @@ static void cxt5066_hp_automute(struct hda_codec *codec)
 /* unsolicited event for jack sensing */
 static void cxt5066_olpc_unsol_event(struct hda_codec *codec, unsigned int res)
 {
+        struct conexant_spec *spec = codec->spec;
         snd_printdd("CXT5066: unsol event %x (%x)\n", res, res >> 26);
         switch (res >> 26) {
         case CONEXANT_HP_EVENT:
                 cxt5066_hp_automute(codec);
                 break;
         case CONEXANT_MIC_EVENT:
-                cxt5066_olpc_automic(codec);
+                /* ignore mic events in DC mode; we're always using the jack */
+                if (!spec->dc_enable)
+                        cxt5066_olpc_automic(codec);
                 break;
         }
 }
@@ -2159,6 +2216,15 @@ static const struct hda_input_mux cxt5066_analog_mic_boost = {
         },
 };
 
+static int cxt5066_set_mic_boost(struct hda_codec *codec)
+{
+        struct conexant_spec *spec = codec->spec;
+        return snd_hda_codec_write_cache(codec, 0x17, 0,
+                AC_VERB_SET_AMP_GAIN_MUTE,
+                AC_AMP_SET_RIGHT | AC_AMP_SET_LEFT | AC_AMP_SET_OUTPUT |
+                        cxt5066_analog_mic_boost.items[spec->mic_boost].index);
+}
+
 static int cxt5066_mic_boost_mux_enum_info(struct snd_kcontrol *kcontrol,
                                            struct snd_ctl_elem_info *uinfo)
 {
@@ -2169,15 +2235,8 @@ static int cxt5066_mic_boost_mux_enum_get(struct snd_kcontrol *kcontrol,
                                           struct snd_ctl_elem_value *ucontrol)
 {
         struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
-        int val;
-        hda_nid_t nid = kcontrol->private_value & 0xff;
-        int inout = (kcontrol->private_value & 0x100) ?
-                AC_AMP_GET_INPUT : AC_AMP_GET_OUTPUT;
-
-        val = snd_hda_codec_read(codec, nid, 0,
-                AC_VERB_GET_AMP_GAIN_MUTE, inout);
-
-        ucontrol->value.enumerated.item[0] = val & AC_AMP_GAIN;
+        struct conexant_spec *spec = codec->spec;
+        ucontrol->value.enumerated.item[0] = spec->mic_boost;
         return 0;
 }
 
@@ -2185,23 +2244,101 @@ static int cxt5066_mic_boost_mux_enum_put(struct snd_kcontrol *kcontrol,
                                           struct snd_ctl_elem_value *ucontrol)
 {
         struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+        struct conexant_spec *spec = codec->spec;
         const struct hda_input_mux *imux = &cxt5066_analog_mic_boost;
         unsigned int idx;
-        hda_nid_t nid = kcontrol->private_value & 0xff;
-        int inout = (kcontrol->private_value & 0x100) ?
-                AC_AMP_SET_INPUT : AC_AMP_SET_OUTPUT;
+        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;
+}
 
-        if (!imux->num_items)
+static int cxt5066_olpc_dc_put(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_value *ucontrol)
+{
+        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+        struct conexant_spec *spec = codec->spec;
+        int dc_enable = !!ucontrol->value.integer.value[0];
+
+        if (dc_enable == spec->dc_enable)
                 return 0;
+
+        spec->dc_enable = dc_enable;
+        if (dc_enable)
+                cxt5066_enable_dc(codec);
+        else
+                cxt5066_disable_dc(codec);
+
+        return 1;
+}
+
+static int cxt5066_olpc_dc_bias_enum_info(struct snd_kcontrol *kcontrol,
+                                           struct snd_ctl_elem_info *uinfo)
+{
+        return snd_hda_input_mux_info(&cxt5066_olpc_dc_bias, uinfo);
+}
+
+static int cxt5066_olpc_dc_bias_enum_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.enumerated.item[0] = spec->dc_input_bias;
+        return 0;
+}
+
+static int cxt5066_olpc_dc_bias_enum_put(struct snd_kcontrol *kcontrol,
+                                          struct snd_ctl_elem_value *ucontrol)
+{
+        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+        struct conexant_spec *spec = codec->spec;
+        const struct hda_input_mux *imux = &cxt5066_analog_mic_boost;
+        unsigned int idx;
+
         idx = ucontrol->value.enumerated.item[0];
         if (idx >= imux->num_items)
                 idx = imux->num_items - 1;
 
-        snd_hda_codec_write_cache(codec, nid, 0,
-                AC_VERB_SET_AMP_GAIN_MUTE,
-                AC_AMP_SET_RIGHT | AC_AMP_SET_LEFT | inout |
-                        imux->items[idx].index);
-
+        spec->dc_input_bias = idx;
+        if (spec->dc_enable)
+                cxt5066_set_olpc_dc_bias(codec);
         return 1;
 }
 
@@ -2223,6 +2360,9 @@ static void cxt5066_olpc_capture_cleanup(struct hda_codec *codec)
 
                 /* disble internal mic, port C */
                 {0x1b, AC_VERB_SET_PIN_WIDGET_CONTROL, 0},
+
+                /* disable DC capture, port F */
+                {0x1e, AC_VERB_SET_PIN_WIDGET_CONTROL, 0},
                 {},
         };
 
@@ -2282,6 +2422,24 @@ static struct snd_kcontrol_new cxt5066_mixer_master_olpc[] = {
         {}
 };
 
+static struct snd_kcontrol_new cxt5066_mixer_olpc_dc[] = {
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "DC Mode Enable Switch",
+                .info = snd_ctl_boolean_mono_info,
+                .get = cxt5066_olpc_dc_get,
+                .put = cxt5066_olpc_dc_put,
+        },
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "DC Input Bias Enum",
+                .info = cxt5066_olpc_dc_bias_enum_info,
+                .get = cxt5066_olpc_dc_bias_enum_get,
+                .put = cxt5066_olpc_dc_bias_enum_put,
+        },
+        {}
+};
+
 static struct snd_kcontrol_new cxt5066_mixers[] = {
         {
                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -2294,11 +2452,10 @@ static struct snd_kcontrol_new cxt5066_mixers[] = {
 
         {
                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
-                .name = "Ext Mic Boost Capture Enum",
+                .name = "Analog Mic Boost Capture Enum",
                 .info = cxt5066_mic_boost_mux_enum_info,
                 .get = cxt5066_mic_boost_mux_enum_get,
                 .put = cxt5066_mic_boost_mux_enum_put,
-                .private_value = 0x17,
         },
 
         HDA_BIND_VOL("Capture Volume", &cxt5066_bind_capture_vol_others),
@@ -2392,7 +2549,7 @@ static struct hda_verb cxt5066_init_verbs_olpc[] = {
         {0x1d, AC_VERB_SET_PIN_WIDGET_CONTROL, 0},
         {0x1d, AC_VERB_SET_EAPD_BTLENABLE, 0x2}, /* default on */
 
-        /* Port F: unused */
+        /* Port F: external DC input through microphone port */
         {0x1e, AC_VERB_SET_PIN_WIDGET_CONTROL, 0},
 
         /* Port G: internal speakers */
@@ -2513,15 +2670,22 @@ static int cxt5066_init(struct hda_codec *codec)
                 if (spec->dell_vostro)
                         cxt5066_vostro_automic(codec);
         }
+        cxt5066_set_mic_boost(codec);
         return 0;
 }
 
 static int cxt5066_olpc_init(struct hda_codec *codec)
 {
+        struct conexant_spec *spec = codec->spec;
         snd_printdd("CXT5066: init\n");
         conexant_init(codec);
         cxt5066_hp_automute(codec);
-        cxt5066_olpc_automic(codec);
+        if (!spec->dc_enable) {
+                cxt5066_set_mic_boost(codec);
+                cxt5066_olpc_automic(codec);
+        } else {
+                cxt5066_enable_dc(codec);
+        }
         return 0;
 }
 
@@ -2604,8 +2768,10 @@ static int patch_cxt5066(struct hda_codec *codec)
                 codec->patch_ops.unsol_event = cxt5066_olpc_unsol_event;
                 spec->init_verbs[0] = cxt5066_init_verbs_olpc;
                 spec->mixers[spec->num_mixers++] = cxt5066_mixer_master_olpc;
+                spec->mixers[spec->num_mixers++] = cxt5066_mixer_olpc_dc;
                 spec->mixers[spec->num_mixers++] = cxt5066_mixers;
                 spec->port_d_mode = 0;
+                spec->mic_boost = 3; /* default 30dB gain */
 
                 /* no S/PDIF out */
                 spec->multiout.dig_out_nid = 0;
@@ -2627,6 +2793,7 @@ static int patch_cxt5066(struct hda_codec *codec)
                 spec->mixers[spec->num_mixers++] = cxt5066_vostro_mixers;
                 spec->port_d_mode = 0;
                 spec->dell_vostro = 1;
+                spec->mic_boost = 3; /* default 30dB gain */
                 snd_hda_attach_beep_device(codec, 0x13);
 
                 /* no S/PDIF out */