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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-10-10 18:31:26 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-02-21 19:34:48 +0000
commit71d08516b80638a69d5efea4e8cb832c053f9dd9 (patch)
tree5f3c1497024c4669a1443fd30263ed81b591aa15
parent2b4bdee2920fb3894f9116f76343f8b31f9e4da8 (diff)
downloadop-kernel-dev-71d08516b80638a69d5efea4e8cb832c053f9dd9.zip
op-kernel-dev-71d08516b80638a69d5efea4e8cb832c053f9dd9.tar.gz
ASoC: core: Add SND_SOC_BYTES control for coefficient blocks
Allow devices to export blocks of registers to the application layer, intended for use for reading and writing coefficient data which can't usefully be worked with by the kernel at runtime (for example, due to requiring complex and expensive calculations or being the results of callibration procedures). Currently drivers are using platform data to provide configurations for coefficient blocks which isn't at all convenient for runtime management or configuration development. Currently only devices using regmap are supported, an error will be generated for any attempt to work with a byte control on a non-regmap device. There's no fundamental block to other devices so support could be added if required. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
-rw-r--r--include/sound/soc.h18
-rw-r--r--sound/soc/soc-core.c49
2 files changed, 67 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 1e16d6e..3e9cae0 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -185,6 +185,12 @@
.rreg = xreg_right, .shift = xshift, \
.min = xmin, .max = xmax} }
+#define SND_SOC_BYTES(xname, xbase, xregs) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+ .info = snd_soc_bytes_info, .get = snd_soc_bytes_get, \
+ .put = snd_soc_bytes_put, .private_value = \
+ ((unsigned long)&(struct soc_bytes) \
+ {.base = xbase, .num_regs = xregs }) }
/*
* Simplified versions of above macros, declaring a struct and calculating
@@ -413,6 +419,13 @@ int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
+int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo);
+int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol);
+int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol);
+
/**
* struct snd_soc_reg_access - Describes whether a given register is
@@ -888,6 +901,11 @@ struct soc_mixer_control {
unsigned int reg, rreg, shift, rshift, invert;
};
+struct soc_bytes {
+ int base;
+ int num_regs;
+};
+
/* enumerated kcontrol */
struct soc_enum {
unsigned short reg;
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 3ca7059..a9786ab7 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2736,6 +2736,55 @@ int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);
+int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct soc_bytes *params = (void *)kcontrol->private_value;
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+ uinfo->count = params->num_regs * codec->val_bytes;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
+
+int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_bytes *params = (void *)kcontrol->private_value;
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ int ret;
+
+ if (codec->using_regmap)
+ ret = regmap_raw_read(codec->control_data, params->base,
+ ucontrol->value.bytes.data,
+ params->num_regs * codec->val_bytes);
+ else
+ ret = -EINVAL;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
+
+int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_bytes *params = (void *)kcontrol->private_value;
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ int ret;
+
+ if (codec->using_regmap)
+ ret = regmap_raw_write(codec->control_data, params->base,
+ ucontrol->value.bytes.data,
+ params->num_regs * codec->val_bytes);
+ else
+ ret = -EINVAL;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
+
/**
* snd_soc_dai_set_sysclk - configure DAI system or master clock.
* @dai: DAI
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