ASoC: New enum type: value_enum

This patch introduces a new enum type.
In this enum type each enumerated items referred with a value.

This new enum type can handle enums encoded in bitfield, or any other
weird ways. twl4030 codec has several mux selection register, where the
input/output mux is coded in a bitfield. With the normal enum type this type
of mux can not be handled in a clean way.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 194 insertions, 3 deletions

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 6c79ca6df0bf..ad0d801677c1 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -53,13 +53,15 @@
 /* dapm power sequences - make this per codec in the future */
 static int dapm_up_seq[] = {
 	snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
-	snd_soc_dapm_mux, snd_soc_dapm_dac, snd_soc_dapm_mixer, snd_soc_dapm_pga,
-	snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_post
+	snd_soc_dapm_mux, snd_soc_dapm_value_mux, snd_soc_dapm_dac,
+	snd_soc_dapm_mixer, snd_soc_dapm_pga, snd_soc_dapm_adc, snd_soc_dapm_hp,
+	snd_soc_dapm_spk, snd_soc_dapm_post
 };
 static int dapm_down_seq[] = {
 	snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk,
 	snd_soc_dapm_pga, snd_soc_dapm_mixer, snd_soc_dapm_dac, snd_soc_dapm_mic,
-	snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_post
+	snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_value_mux,
+	snd_soc_dapm_post
 };
 
 static int dapm_status = 1;
@@ -134,6 +136,25 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
 		}
 	}
 	break;
+	case snd_soc_dapm_value_mux: {
+		struct soc_value_enum *e = (struct soc_value_enum *)
+			w->kcontrols[i].private_value;
+		int val, item;
+
+		val = snd_soc_read(w->codec, e->reg);
+		val = (val >> e->shift_l) & e->mask;
+		for (item = 0; item < e->max; item++) {
+			if (val == e->values[item])
+				break;
+		}
+
+		p->connect = 0;
+		for (i = 0; i < e->max; i++) {
+			if (!(strcmp(p->name, e->texts[i])) && item == i)
+				p->connect = 1;
+		}
+	}
+	break;
 	/* does not effect routing - always connected */
 	case snd_soc_dapm_pga:
 	case snd_soc_dapm_output:
@@ -179,6 +200,30 @@ static int dapm_connect_mux(struct snd_soc_codec *codec,
 	return -ENODEV;
 }
 
+/* connect value_mux widget to it's interconnecting audio paths */
+static int dapm_connect_value_mux(struct snd_soc_codec *codec,
+	struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
+	struct snd_soc_dapm_path *path, const char *control_name,
+	const struct snd_kcontrol_new *kcontrol)
+{
+	struct soc_value_enum *e = (struct soc_value_enum *)
+			kcontrol->private_value;
+	int i;
+
+	for (i = 0; i < e->max; i++) {
+		if (!(strcmp(control_name, e->texts[i]))) {
+			list_add(&path->list, &codec->dapm_paths);
+			list_add(&path->list_sink, &dest->sources);
+			list_add(&path->list_source, &src->sinks);
+			path->name = (char *)e->texts[i];
+			dapm_set_path_status(dest, path, 0);
+			return 0;
+		}
+	}
+
+	return -ENODEV;
+}
+
 /* connect mixer widget to it's interconnecting audio paths */
 static int dapm_connect_mixer(struct snd_soc_codec *codec,
 	struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
@@ -653,6 +698,7 @@ static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
 		case snd_soc_dapm_vmid:
 			continue;
 		case snd_soc_dapm_mux:
+		case snd_soc_dapm_value_mux:
 		case snd_soc_dapm_output:
 		case snd_soc_dapm_input:
 		case snd_soc_dapm_switch:
@@ -728,6 +774,45 @@ static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
 	return 0;
 }
 
+/* test and update the power status of a value_mux widget */
+static int dapm_value_mux_update_power(struct snd_soc_dapm_widget *widget,
+				 struct snd_kcontrol *kcontrol, int mask,
+				 int mux, int val, struct soc_value_enum *e)
+{
+	struct snd_soc_dapm_path *path;
+	int found = 0;
+
+	if (widget->id != snd_soc_dapm_value_mux)
+		return -ENODEV;
+
+	if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
+		return 0;
+
+	/* find dapm widget path assoc with kcontrol */
+	list_for_each_entry(path, &widget->codec->dapm_paths, list) {
+		if (path->kcontrol != kcontrol)
+			continue;
+
+		if (!path->name || !e->texts[mux])
+			continue;
+
+		found = 1;
+		/* we now need to match the string in the enum to the path */
+		if (!(strcmp(path->name, e->texts[mux])))
+			path->connect = 1; /* new connection */
+		else
+			path->connect = 0; /* old connection must be
+					      powered down */
+	}
+
+	if (found) {
+		dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
+		dump_dapm(widget->codec, "mux power update");
+	}
+
+	return 0;
+}
+
 /* test and update the power status of a mixer or switch widget */
 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
 				   struct snd_kcontrol *kcontrol, int reg,
@@ -965,6 +1050,12 @@ static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
 		if (ret != 0)
 			goto err;
 		break;
+	case snd_soc_dapm_value_mux:
+		ret = dapm_connect_value_mux(codec, wsource, wsink, path,
+			control, &wsink->kcontrols[0]);
+		if (ret != 0)
+			goto err;
+		break;
 	case snd_soc_dapm_switch:
 	case snd_soc_dapm_mixer:
 		ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
@@ -1047,6 +1138,7 @@ int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
 			dapm_new_mixer(codec, w);
 			break;
 		case snd_soc_dapm_mux:
+		case snd_soc_dapm_value_mux:
 			dapm_new_mux(codec, w);
 			break;
 		case snd_soc_dapm_adc:
@@ -1274,6 +1366,105 @@ out:
 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
 
 /**
+ * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
+ *					callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to get the value of a dapm semi enumerated double mixer control.
+ *
+ * Semi enumerated mixer: the enumerated items are referred as values. Can be
+ * used for handling bitfield coded enumeration for example.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
+	struct soc_value_enum *e = (struct soc_value_enum *)
+			kcontrol->private_value;
+	unsigned short reg_val, val, mux;
+
+	reg_val = snd_soc_read(widget->codec, e->reg);
+	val = (reg_val >> e->shift_l) & e->mask;
+	for (mux = 0; mux < e->max; mux++) {
+		if (val == e->values[mux])
+			break;
+	}
+	ucontrol->value.enumerated.item[0] = mux;
+	if (e->shift_l != e->shift_r) {
+		val = (reg_val >> e->shift_r) & e->mask;
+		for (mux = 0; mux < e->max; mux++) {
+			if (val == e->values[mux])
+				break;
+		}
+		ucontrol->value.enumerated.item[1] = mux;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
+
+/**
+ * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
+ *					callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to set the value of a dapm semi enumerated double mixer control.
+ *
+ * Semi enumerated mixer: the enumerated items are referred as values. Can be
+ * used for handling bitfield coded enumeration for example.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
+	struct soc_value_enum *e = (struct soc_value_enum *)
+			kcontrol->private_value;
+	unsigned short val, mux;
+	unsigned short mask;
+	int ret = 0;
+
+	if (ucontrol->value.enumerated.item[0] > e->max - 1)
+		return -EINVAL;
+	mux = ucontrol->value.enumerated.item[0];
+	val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
+	mask = e->mask << e->shift_l;
+	if (e->shift_l != e->shift_r) {
+		if (ucontrol->value.enumerated.item[1] > e->max - 1)
+			return -EINVAL;
+		val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
+		mask |= e->mask << e->shift_r;
+	}
+
+	mutex_lock(&widget->codec->mutex);
+	widget->value = val;
+	dapm_value_mux_update_power(widget, kcontrol, mask, mux, val, e);
+	if (widget->event) {
+		if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
+			ret = widget->event(widget,
+				kcontrol, SND_SOC_DAPM_PRE_REG);
+			if (ret < 0)
+				goto out;
+		}
+		ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
+		if (widget->event_flags & SND_SOC_DAPM_POST_REG)
+			ret = widget->event(widget,
+				kcontrol, SND_SOC_DAPM_POST_REG);
+	} else
+		ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
+
+out:
+	mutex_unlock(&widget->codec->mutex);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
+
+/**
  * snd_soc_dapm_new_control - create new dapm control
  * @codec: audio codec
  * @widget: widget template