[alsa-devel] [PATCH 02/11] ASoC: Consolidate enum and value enum controls
Lars-Peter Clausen
lars at metafoo.de
Sun Feb 23 16:10:12 CET 2014
The implementations for enum and value enum controls are almost identical. The
only difference is that the value enum uses an additional look-up table to map
the control value to the register value, while the enum control uses a direct
mapping. Enums and value enums can easily be distinguished at runtime, for value
enums the values field of the snd_soc_enum struct contains the look-up table,
while for enums it is NULL. This patch adds two new small helper functions
called snd_soc_enum_item_to_val() and snd_soc_enum_val_to_item() which map
between register value and control item. If the items field of the snd_soc_enum
struct is NULL the function will do a direct mapping otherwise they'll use the
look-up table to do the mapping. Using these small helper functions it is
possible to use the same kcontrol handlers for both enums and value enums. The
functions are added a inline functions in soc.h so they can also be used by the
DAPM code to accomplish similar consolidation.
Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
---
include/sound/soc.h | 34 ++++++++++++-----
sound/soc/soc-core.c | 101 ++++++++-------------------------------------------
2 files changed, 41 insertions(+), 94 deletions(-)
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 8ffaa46..e005196 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -195,11 +195,7 @@
.get = snd_soc_get_enum_double, .put = snd_soc_put_enum_double, \
.private_value = (unsigned long)&xenum }
#define SOC_VALUE_ENUM(xname, xenum) \
-{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,\
- .info = snd_soc_info_enum_double, \
- .get = snd_soc_get_value_enum_double, \
- .put = snd_soc_put_value_enum_double, \
- .private_value = (unsigned long)&xenum }
+ SOC_ENUM(xname, xenum)
#define SOC_SINGLE_EXT(xname, xreg, xshift, xmax, xinvert,\
xhandler_get, xhandler_put) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
@@ -508,10 +504,6 @@ int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
-int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol);
-int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol);
int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
#define snd_soc_info_bool_ext snd_ctl_boolean_mono_info
@@ -1180,6 +1172,30 @@ static inline bool snd_soc_volsw_is_stereo(struct soc_mixer_control *mc)
return 1;
}
+static inline unsigned int snd_soc_enum_val_to_item(struct soc_enum *e,
+ unsigned int val)
+{
+ unsigned int i;
+
+ if (!e->values)
+ return val;
+
+ for (i = 0; i < e->items; i++)
+ if (val == e->values[i])
+ return i;
+
+ return 0;
+}
+
+static inline unsigned int snd_soc_enum_item_to_val(struct soc_enum *e,
+ unsigned int item)
+{
+ if (!e->values)
+ return item;
+
+ return e->values[item];
+}
+
int snd_soc_util_init(void);
void snd_soc_util_exit(void);
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 0911856..bc8da80 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2596,14 +2596,18 @@ int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
- unsigned int val;
+ unsigned int val, item;
+ unsigned int reg_val;
- val = snd_soc_read(codec, e->reg);
- ucontrol->value.enumerated.item[0]
- = (val >> e->shift_l) & e->mask;
- if (e->shift_l != e->shift_r)
- ucontrol->value.enumerated.item[1] =
- (val >> e->shift_r) & e->mask;
+ reg_val = snd_soc_read(codec, e->reg);
+ val = (reg_val >> e->shift_l) & e->mask;
+ item = snd_soc_enum_val_to_item(e, val);
+ ucontrol->value.enumerated.item[0] = item;
+ if (e->shift_l != e->shift_r) {
+ val = (reg_val >> e->shift_l) & e->mask;
+ item = snd_soc_enum_val_to_item(e, val);
+ ucontrol->value.enumerated.item[1] = item;
+ }
return 0;
}
@@ -2623,17 +2627,18 @@ int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+ unsigned int *item = ucontrol->value.enumerated.item;
unsigned int val;
unsigned int mask;
- if (ucontrol->value.enumerated.item[0] >= e->items)
+ if (item[0] >= e->items)
return -EINVAL;
- val = ucontrol->value.enumerated.item[0] << e->shift_l;
+ val = snd_soc_enum_item_to_val(e, 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->items)
+ if (item[1] >= e->items)
return -EINVAL;
- val |= ucontrol->value.enumerated.item[1] << e->shift_r;
+ val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
mask |= e->mask << e->shift_r;
}
@@ -2642,80 +2647,6 @@ int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
EXPORT_SYMBOL_GPL(snd_soc_put_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_enum *e = (struct soc_enum *)kcontrol->private_value;
- unsigned int 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->items; 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->items; 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_enum *e = (struct soc_enum *)kcontrol->private_value;
- unsigned int val;
- unsigned int mask;
-
- if (ucontrol->value.enumerated.item[0] >= e->items)
- 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->items)
- return -EINVAL;
- val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
- mask |= e->mask << e->shift_r;
- }
-
- return snd_soc_update_bits_locked(codec, e->reg, mask, val);
-}
-EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
-
-/**
* snd_soc_read_signed - Read a codec register and interprete as signed value
* @codec: codec
* @reg: Register to read
--
1.8.0
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