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-rw-r--r--include/sound/soc.h27
-rw-r--r--sound/soc/soc-cache.c339
-rw-r--r--sound/soc/soc-core.c37
3 files changed, 349 insertions, 54 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 5d3954774ade..275e41133468 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -238,6 +238,7 @@ struct soc_enum;
struct snd_soc_ac97_ops;
struct snd_soc_jack;
struct snd_soc_jack_pin;
+struct snd_soc_cache_ops;
#include <sound/soc-dapm.h>
#ifdef CONFIG_GPIOLIB
@@ -254,6 +255,10 @@ enum snd_soc_control_type {
SND_SOC_SPI,
};
+enum snd_soc_compress_type {
+ SND_SOC_NO_COMPRESSION
+};
+
int snd_soc_register_platform(struct device *dev,
struct snd_soc_platform_driver *platform_drv);
void snd_soc_unregister_platform(struct device *dev);
@@ -265,6 +270,13 @@ int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg);
int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
int addr_bits, int data_bits,
enum snd_soc_control_type control);
+int snd_soc_cache_sync(struct snd_soc_codec *codec);
+int snd_soc_cache_init(struct snd_soc_codec *codec);
+int snd_soc_cache_exit(struct snd_soc_codec *codec);
+int snd_soc_cache_write(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int value);
+int snd_soc_cache_read(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int *value);
/* Utility functions to get clock rates from various things */
int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots);
@@ -421,6 +433,18 @@ struct snd_soc_ops {
int (*trigger)(struct snd_pcm_substream *, int);
};
+/* SoC cache ops */
+struct snd_soc_cache_ops {
+ enum snd_soc_compress_type id;
+ int (*init)(struct snd_soc_codec *codec);
+ int (*exit)(struct snd_soc_codec *codec);
+ int (*read)(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int *value);
+ int (*write)(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int value);
+ int (*sync)(struct snd_soc_codec *codec);
+};
+
/* SoC Audio Codec device */
struct snd_soc_codec {
const char *name;
@@ -450,6 +474,8 @@ struct snd_soc_codec {
hw_write_t hw_write;
unsigned int (*hw_read)(struct snd_soc_codec *, unsigned int);
void *reg_cache;
+ const struct snd_soc_cache_ops *cache_ops;
+ struct mutex cache_rw_mutex;
/* dapm */
struct snd_soc_dapm_context dapm;
@@ -482,6 +508,7 @@ struct snd_soc_codec_driver {
short reg_cache_step;
short reg_word_size;
const void *reg_cache_default;
+ enum snd_soc_compress_type compress_type;
/* codec bias level */
int (*set_bias_level)(struct snd_soc_codec *,
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index e7479988deca..cbf9694097b2 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -18,7 +18,8 @@
static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec,
unsigned int reg)
{
- u16 *cache = codec->reg_cache;
+ int ret;
+ unsigned int val;
if (reg >= codec->driver->reg_cache_size ||
snd_soc_codec_volatile_register(codec, reg)) {
@@ -29,13 +30,15 @@ static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec,
return codec->hw_read(codec, reg);
}
- return cache[reg];
+ ret = snd_soc_cache_read(codec, reg, &val);
+ if (ret < 0)
+ return -1;
+ return val;
}
static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
- u16 *cache = codec->reg_cache;
u8 data[2];
int ret;
@@ -43,8 +46,11 @@ static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg,
data[1] = value & 0x00ff;
if (!snd_soc_codec_volatile_register(codec, reg) &&
- reg < codec->driver->reg_cache_size)
- cache[reg] = value;
+ reg < codec->driver->reg_cache_size) {
+ ret = snd_soc_cache_write(codec, reg, value);
+ if (ret < 0)
+ return -1;
+ }
if (codec->cache_only) {
codec->cache_sync = 1;
@@ -93,7 +99,8 @@ static int snd_soc_4_12_spi_write(void *control_data, const char *data,
static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec,
unsigned int reg)
{
- u16 *cache = codec->reg_cache;
+ int ret;
+ unsigned int val;
if (reg >= codec->driver->reg_cache_size ||
snd_soc_codec_volatile_register(codec, reg)) {
@@ -104,13 +111,15 @@ static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec,
return codec->hw_read(codec, reg);
}
- return cache[reg];
+ ret = snd_soc_cache_read(codec, reg, &val);
+ if (ret < 0)
+ return -1;
+ return val;
}
static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
- u16 *cache = codec->reg_cache;
u8 data[2];
int ret;
@@ -118,8 +127,11 @@ static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg,
data[1] = value & 0x00ff;
if (!snd_soc_codec_volatile_register(codec, reg) &&
- reg < codec->driver->reg_cache_size)
- cache[reg] = value;
+ reg < codec->driver->reg_cache_size) {
+ ret = snd_soc_cache_write(codec, reg, value);
+ if (ret < 0)
+ return -1;
+ }
if (codec->cache_only) {
codec->cache_sync = 1;
@@ -168,16 +180,19 @@ static int snd_soc_7_9_spi_write(void *control_data, const char *data,
static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
- u8 *cache = codec->reg_cache;
u8 data[2];
+ int ret;
reg &= 0xff;
data[0] = reg;
data[1] = value & 0xff;
if (!snd_soc_codec_volatile_register(codec, reg) &&
- reg < codec->driver->reg_cache_size)
- cache[reg] = value;
+ reg < codec->driver->reg_cache_size) {
+ ret = snd_soc_cache_write(codec, reg, value);
+ if (ret < 0)
+ return -1;
+ }
if (codec->cache_only) {
codec->cache_sync = 1;
@@ -193,7 +208,8 @@ static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg,
static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec,
unsigned int reg)
{
- u8 *cache = codec->reg_cache;
+ int ret;
+ unsigned int val;
reg &= 0xff;
if (reg >= codec->driver->reg_cache_size ||
@@ -205,7 +221,10 @@ static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec,
return codec->hw_read(codec, reg);
}
- return cache[reg];
+ ret = snd_soc_cache_read(codec, reg, &val);
+ if (ret < 0)
+ return -1;
+ return val;
}
#if defined(CONFIG_SPI_MASTER)
@@ -241,16 +260,19 @@ static int snd_soc_8_8_spi_write(void *control_data, const char *data,
static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
- u16 *reg_cache = codec->reg_cache;
u8 data[3];
+ int ret;
data[0] = reg;
data[1] = (value >> 8) & 0xff;
data[2] = value & 0xff;
if (!snd_soc_codec_volatile_register(codec, reg) &&
- reg < codec->driver->reg_cache_size)
- reg_cache[reg] = value;
+ reg < codec->driver->reg_cache_size) {
+ ret = snd_soc_cache_write(codec, reg, value);
+ if (ret < 0)
+ return -1;
+ }
if (codec->cache_only) {
codec->cache_sync = 1;
@@ -266,7 +288,8 @@ static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg,
static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec,
unsigned int reg)
{
- u16 *cache = codec->reg_cache;
+ int ret;
+ unsigned int val;
if (reg >= codec->driver->reg_cache_size ||
snd_soc_codec_volatile_register(codec, reg)) {
@@ -275,9 +298,12 @@ static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec,
BUG_ON(!codec->hw_read);
return codec->hw_read(codec, reg);
- } else {
- return cache[reg];
}
+
+ ret = snd_soc_cache_read(codec, reg, &val);
+ if (ret < 0)
+ return -1;
+ return val;
}
#if defined(CONFIG_SPI_MASTER)
@@ -416,7 +442,8 @@ static unsigned int snd_soc_16_8_read_i2c(struct snd_soc_codec *codec,
static unsigned int snd_soc_16_8_read(struct snd_soc_codec *codec,
unsigned int reg)
{
- u8 *cache = codec->reg_cache;
+ int ret;
+ unsigned int val;
reg &= 0xff;
if (reg >= codec->driver->reg_cache_size ||
@@ -428,13 +455,15 @@ static unsigned int snd_soc_16_8_read(struct snd_soc_codec *codec,
return codec->hw_read(codec, reg);
}
- return cache[reg];
+ ret = snd_soc_cache_read(codec, reg, &val);
+ if (ret < 0)
+ return -1;
+ return val;
}
static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
- u8 *cache = codec->reg_cache;
u8 data[3];
int ret;
@@ -444,8 +473,11 @@ static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg,
reg &= 0xff;
if (!snd_soc_codec_volatile_register(codec, reg) &&
- reg < codec->driver->reg_cache_size)
- cache[reg] = value;
+ reg < codec->driver->reg_cache_size) {
+ ret = snd_soc_cache_write(codec, reg, value);
+ if (ret < 0)
+ return -1;
+ }
if (codec->cache_only) {
codec->cache_sync = 1;
@@ -529,7 +561,8 @@ static unsigned int snd_soc_16_16_read_i2c(struct snd_soc_codec *codec,
static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec,
unsigned int reg)
{
- u16 *cache = codec->reg_cache;
+ int ret;
+ unsigned int val;
if (reg >= codec->driver->reg_cache_size ||
snd_soc_codec_volatile_register(codec, reg)) {
@@ -540,13 +573,16 @@ static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec,
return codec->hw_read(codec, reg);
}
- return cache[reg];
+ ret = snd_soc_cache_read(codec, reg, &val);
+ if (ret < 0)
+ return -1;
+
+ return val;
}
static int snd_soc_16_16_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
- u16 *cache = codec->reg_cache;
u8 data[4];
int ret;
@@ -556,8 +592,11 @@ static int snd_soc_16_16_write(struct snd_soc_codec *codec, unsigned int reg,
data[3] = value & 0xff;
if (!snd_soc_codec_volatile_register(codec, reg) &&
- reg < codec->driver->reg_cache_size)
- cache[reg] = value;
+ reg < codec->driver->reg_cache_size) {
+ ret = snd_soc_cache_write(codec, reg, value);
+ if (ret < 0)
+ return -1;
+ }
if (codec->cache_only) {
codec->cache_sync = 1;
@@ -718,3 +757,241 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io);
+
+static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
+{
+ int i;
+ struct snd_soc_codec_driver *codec_drv;
+ unsigned int val;
+
+ codec_drv = codec->driver;
+ for (i = 0; i < codec_drv->reg_cache_size; ++i) {
+ snd_soc_cache_read(codec, i, &val);
+ if (codec_drv->reg_cache_default) {
+ switch (codec_drv->reg_word_size) {
+ case 1: {
+ const u8 *cache;
+
+ cache = codec_drv->reg_cache_default;
+ if (cache[i] == val)
+ continue;
+ }
+ break;
+ case 2: {
+ const u16 *cache;
+
+ cache = codec_drv->reg_cache_default;
+ if (cache[i] == val)
+ continue;
+ }
+ break;
+ default:
+ BUG();
+ }
+ }
+ snd_soc_write(codec, i, val);
+ dev_dbg(codec->dev, "Synced register %#x, value = %#x\n",
+ i, val);
+ }
+ return 0;
+}
+
+static int snd_soc_flat_cache_write(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int value)
+{
+ switch (codec->driver->reg_word_size) {
+ case 1: {
+ u8 *cache;
+
+ cache = codec->reg_cache;
+ cache[reg] = value;
+ }
+ break;
+ case 2: {
+ u16 *cache;
+
+ cache = codec->reg_cache;
+ cache[reg] = value;
+ }
+ break;
+ default:
+ BUG();
+ }
+
+ return 0;
+}
+
+static int snd_soc_flat_cache_read(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int *value)
+{
+ switch (codec->driver->reg_word_size) {
+ case 1: {
+ u8 *cache;
+
+ cache = codec->reg_cache;
+ *value = cache[reg];
+ }
+ break;
+ case 2: {
+ u16 *cache;
+
+ cache = codec->reg_cache;
+ *value = cache[reg];
+ }
+ break;
+ default:
+ BUG();
+ }
+
+ return 0;
+}
+
+static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec)
+{
+ if (!codec->reg_cache)
+ return 0;
+ kfree(codec->reg_cache);
+ codec->reg_cache = NULL;
+ return 0;
+}
+
+static int snd_soc_flat_cache_init(struct snd_soc_codec *codec)
+{
+ struct snd_soc_codec_driver *codec_drv;
+ size_t reg_size;
+
+ codec_drv = codec->driver;
+ reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
+
+ if (codec_drv->reg_cache_default)
+ codec->reg_cache = kmemdup(codec_drv->reg_cache_default,
+ reg_size, GFP_KERNEL);
+ else
+ codec->reg_cache = kzalloc(reg_size, GFP_KERNEL);
+ if (!codec->reg_cache)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/* an array of all supported compression types */
+static const struct snd_soc_cache_ops cache_types[] = {
+ {
+ .id = SND_SOC_NO_COMPRESSION,
+ .init = snd_soc_flat_cache_init,
+ .exit = snd_soc_flat_cache_exit,
+ .read = snd_soc_flat_cache_read,
+ .write = snd_soc_flat_cache_write,
+ .sync = snd_soc_flat_cache_sync
+ }
+};
+
+int snd_soc_cache_init(struct snd_soc_codec *codec)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cache_types); ++i)
+ if (cache_types[i].id == codec->driver->compress_type)
+ break;
+ if (i == ARRAY_SIZE(cache_types)) {
+ dev_err(codec->dev, "Could not match compress type: %d\n",
+ codec->driver->compress_type);
+ return -EINVAL;
+ }
+
+ mutex_init(&codec->cache_rw_mutex);
+ codec->cache_ops = &cache_types[i];
+
+ if (codec->cache_ops->init)
+ return codec->cache_ops->init(codec);
+ return -EINVAL;
+}
+
+/*
+ * NOTE: keep in mind that this function might be called
+ * multiple times.
+ */
+int snd_soc_cache_exit(struct snd_soc_codec *codec)
+{
+ if (codec->cache_ops && codec->cache_ops->exit)
+ return codec->cache_ops->exit(codec);
+ return -EINVAL;
+}
+
+/**
+ * snd_soc_cache_read: Fetch the value of a given register from the cache.
+ *
+ * @codec: CODEC to configure.
+ * @reg: The register index.
+ * @value: The value to be returned.
+ */
+int snd_soc_cache_read(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int *value)
+{
+ int ret;
+
+ mutex_lock(&codec->cache_rw_mutex);
+
+ if (value && codec->cache_ops && codec->cache_ops->read) {
+ ret = codec->cache_ops->read(codec, reg, value);
+ mutex_unlock(&codec->cache_rw_mutex);
+ return ret;
+ }
+
+ mutex_unlock(&codec->cache_rw_mutex);
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_cache_read);
+
+/**
+ * snd_soc_cache_write: Set the value of a given register in the cache.
+ *
+ * @codec: CODEC to configure.
+ * @reg: The register index.
+ * @value: The new register value.
+ */
+int snd_soc_cache_write(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int value)
+{
+ int ret;
+
+ mutex_lock(&codec->cache_rw_mutex);
+
+ if (codec->cache_ops && codec->cache_ops->write) {
+ ret = codec->cache_ops->write(codec, reg, value);
+ mutex_unlock(&codec->cache_rw_mutex);
+ return ret;
+ }
+
+ mutex_unlock(&codec->cache_rw_mutex);
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_cache_write);
+
+/**
+ * snd_soc_cache_sync: Sync the register cache with the hardware.
+ *
+ * @codec: CODEC to configure.
+ *
+ * Any registers that should not be synced should be marked as
+ * volatile. In general drivers can choose not to use the provided
+ * syncing functionality if they so require.
+ */
+int snd_soc_cache_sync(struct snd_soc_codec *codec)
+{
+ int ret;
+
+ if (!codec->cache_sync) {
+ return 0;
+ }
+
+ if (codec->cache_ops && codec->cache_ops->sync) {
+ ret = codec->cache_ops->sync(codec);
+ if (!ret)
+ codec->cache_sync = 0;
+ return ret;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_cache_sync);
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 700a6d5b9721..3d70ce58d03c 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3279,29 +3279,21 @@ int snd_soc_register_codec(struct device *dev,
codec->dapm.bias_level = SND_SOC_BIAS_OFF;
codec->dapm.dev = dev;
codec->dapm.codec = codec;
+ codec->dev = dev;
+ codec->driver = codec_drv;
+ codec->num_dai = num_dai;
+ mutex_init(&codec->mutex);
/* allocate CODEC register cache */
if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
-
- if (codec_drv->reg_cache_default)
- codec->reg_cache = kmemdup(codec_drv->reg_cache_default,
- codec_drv->reg_cache_size * codec_drv->reg_word_size, GFP_KERNEL);
- else
- codec->reg_cache = kzalloc(codec_drv->reg_cache_size *
- codec_drv->reg_word_size, GFP_KERNEL);
-
- if (codec->reg_cache == NULL) {
- kfree(codec->name);
- kfree(codec);
- return -ENOMEM;
+ ret = snd_soc_cache_init(codec);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to set cache compression type: %d\n",
+ ret);
+ goto error_cache;
}
}
- codec->dev = dev;
- codec->driver = codec_drv;
- codec->num_dai = num_dai;
- mutex_init(&codec->mutex);
-
for (i = 0; i < num_dai; i++) {
fixup_codec_formats(&dai_drv[i].playback);
fixup_codec_formats(&dai_drv[i].capture);
@@ -3311,7 +3303,7 @@ int snd_soc_register_codec(struct device *dev,
if (num_dai) {
ret = snd_soc_register_dais(dev, dai_drv, num_dai);
if (ret < 0)
- goto error;
+ goto error_dais;
}
mutex_lock(&client_mutex);
@@ -3322,9 +3314,9 @@ int snd_soc_register_codec(struct device *dev,
pr_debug("Registered codec '%s'\n", codec->name);
return 0;
-error:
- if (codec->reg_cache)
- kfree(codec->reg_cache);
+error_dais:
+ snd_soc_cache_exit(codec);
+error_cache:
kfree(codec->name);
kfree(codec);
return ret;
@@ -3358,8 +3350,7 @@ found:
pr_debug("Unregistered codec '%s'\n", codec->name);
- if (codec->reg_cache)
- kfree(codec->reg_cache);
+ snd_soc_cache_exit(codec);
kfree(codec->name);
kfree(codec);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.