ASoC: core: Add single controls with specified range of values

Control type added for cases where a specific range of values
within a register are required for control.

Added convenience macros:

SOC_SINGLE_RANGE
SOC_SINGLE_RANGE_TLV

Added accessor implementations:

snd_soc_info_volsw_range
snd_soc_put_volsw_range
snd_soc_get_volsw_range

Signed-off-by: Michal Hajduk <Michal.Hajduk@diasemi.com>
Signed-off-by: Adam Thomson <Adam.Thomson@diasemi.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 121 insertions, 0 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 23c4efbe13a6..e4348d25fca3 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -47,6 +47,13 @@
         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
         .put = snd_soc_put_volsw, \
         .private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }
+#define SOC_SINGLE_RANGE(xname, xreg, xshift, xmin, xmax, xinvert) \
+{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
+        .info = snd_soc_info_volsw_range, .get = snd_soc_get_volsw_range, \
+        .put = snd_soc_put_volsw_range, \
+        .private_value = (unsigned long)&(struct soc_mixer_control) \
+                {.reg = xreg, .shift = xshift, .min = xmin,\
+                 .max = xmax, .platform_max = xmax, .invert = xinvert} }
 #define SOC_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
@@ -67,6 +74,16 @@
                 {.reg = xreg, .rreg = xreg, \
                 .shift = xshift, .rshift = xshift, \
                 .max = xmax, .min = xmin} }
+#define SOC_SINGLE_RANGE_TLV(xname, xreg, xshift, xmin, xmax, xinvert, tlv_array) \
+{       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
+        .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
+                 SNDRV_CTL_ELEM_ACCESS_READWRITE,\
+        .tlv.p = (tlv_array), \
+        .info = snd_soc_info_volsw_range, \
+        .get = snd_soc_get_volsw_range, .put = snd_soc_put_volsw_range, \
+        .private_value = (unsigned long)&(struct soc_mixer_control) \
+                {.reg = xreg, .shift = xshift, .min = xmin,\
+                 .max = xmax, .platform_max = xmax, .invert = xinvert} }
 #define SOC_DOUBLE(xname, reg, shift_left, shift_right, max, invert) \
 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
         .info = snd_soc_info_volsw, .get = snd_soc_get_volsw, \
@@ -460,6 +477,12 @@ int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol);
 int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol);
+int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_info *uinfo);
+int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol);
+int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol);
 int snd_soc_limit_volume(struct snd_soc_codec *codec,
         const char *name, int max);
 int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index ec8350570346..3d803f3cd272 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2792,6 +2792,104 @@ int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
 
 /**
+ * snd_soc_info_volsw_range - single mixer info callback with range.
+ * @kcontrol: mixer control
+ * @uinfo: control element information
+ *
+ * Callback to provide information, within a range, about a single
+ * mixer control.
+ *
+ * returns 0 for success.
+ */
+int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_info *uinfo)
+{
+        struct soc_mixer_control *mc =
+                (struct soc_mixer_control *)kcontrol->private_value;
+        int platform_max;
+        int min = mc->min;
+
+        if (!mc->platform_max)
+                mc->platform_max = mc->max;
+        platform_max = mc->platform_max;
+
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        uinfo->count = 1;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = platform_max - min;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);
+
+/**
+ * snd_soc_put_volsw_range - single mixer put value callback with range.
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to set the value, within a range, for a single mixer control.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        struct soc_mixer_control *mc =
+                (struct soc_mixer_control *)kcontrol->private_value;
+        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+        unsigned int reg = mc->reg;
+        unsigned int shift = mc->shift;
+        int min = mc->min;
+        int max = mc->max;
+        unsigned int mask = (1 << fls(max)) - 1;
+        unsigned int invert = mc->invert;
+        unsigned int val, val_mask;
+
+        val = ((ucontrol->value.integer.value[0] + min) & mask);
+        if (invert)
+                val = max - val;
+        val_mask = mask << shift;
+        val = val << shift;
+
+        return snd_soc_update_bits_locked(codec, reg, val_mask, val);
+}
+EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);
+
+/**
+ * snd_soc_get_volsw_range - single mixer get callback with range
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to get the value, within a range, of a single mixer control.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        struct soc_mixer_control *mc =
+                (struct soc_mixer_control *)kcontrol->private_value;
+        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+        unsigned int reg = mc->reg;
+        unsigned int shift = mc->shift;
+        int min = mc->min;
+        int max = mc->max;
+        unsigned int mask = (1 << fls(max)) - 1;
+        unsigned int invert = mc->invert;
+
+        ucontrol->value.integer.value[0] =
+                (snd_soc_read(codec, reg) >> shift) & mask;
+        if (invert)
+                ucontrol->value.integer.value[0] =
+                        max - ucontrol->value.integer.value[0];
+        ucontrol->value.integer.value[0] =
+                ucontrol->value.integer.value[0] - min;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
+
+/**
  * snd_soc_limit_volume - Set new limit to an existing volume control.
  *
  * @codec: where to look for the control