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, 107 insertions, 0 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index f73c1341437c..6cbe7e82f238 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1585,6 +1585,113 @@ int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
 
 /**
+ * snd_soc_info_value_enum_double - semi enumerated double mixer info callback
+ * @kcontrol: mixer control
+ * @uinfo: control element information
+ *
+ * Callback to provide information about a double semi enumerated
+ * 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_info_value_enum_double(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_info *uinfo)
+{
+        struct soc_value_enum *e = (struct soc_value_enum *)
+                        kcontrol->private_value;
+
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+        uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
+        uinfo->value.enumerated.items = e->max;
+
+        if (uinfo->value.enumerated.item > e->max - 1)
+                uinfo->value.enumerated.item = e->max - 1;
+        strcpy(uinfo->value.enumerated.name,
+                e->texts[uinfo->value.enumerated.item]);
+        return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_info_value_enum_double);
+
+/**
+ * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to get the value of a double semi enumerated mixer.
+ *
+ * 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_get_value_enum_double(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_soc_codec *codec = 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(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_get_value_enum_double);
+
+/**
+ * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to set the value of a double semi enumerated mixer.
+ *
+ * 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_put_value_enum_double(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+        struct soc_value_enum *e = (struct soc_value_enum *)
+                        kcontrol->private_value;
+        unsigned short val;
+        unsigned short mask;
+
+        if (ucontrol->value.enumerated.item[0] > e->max - 1)
+                return -EINVAL;
+        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;
+        }
+
+        return snd_soc_update_bits(codec, e->reg, mask, val);
+}
+EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
+
+/**
  * snd_soc_info_enum_ext - external enumerated single mixer info callback
  * @kcontrol: mixer control
  * @uinfo: control element information