diff options
| -rw-r--r-- | include/sound/soc.h | 3 | ||||
| -rw-r--r-- | sound/soc/soc-cache.c | 39 | ||||
| -rw-r--r-- | sound/soc/soc-core.c | 7 |
3 files changed, 49 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h index bfa4836ea107..2f2a51fe78e9 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -543,6 +543,7 @@ struct snd_soc_codec { unsigned int (*hw_read)(struct snd_soc_codec *, unsigned int); unsigned int (*read)(struct snd_soc_codec *, unsigned int); int (*write)(struct snd_soc_codec *, unsigned int, unsigned int); + int (*bulk_write_raw)(struct snd_soc_codec *, unsigned int, const void *, size_t); void *reg_cache; const void *reg_def_copy; const struct snd_soc_cache_ops *cache_ops; @@ -814,6 +815,8 @@ struct soc_enum { unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg); unsigned int snd_soc_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int val); +unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec, + unsigned int reg, const void *data, size_t len); /* device driver data */ diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c index 9f6737413a6e..8bcd4e1cee91 100644 --- a/sound/soc/soc-cache.c +++ b/sound/soc/soc-cache.c @@ -625,6 +625,44 @@ static int snd_soc_16_16_spi_write(void *control_data, const char *data, #define snd_soc_16_16_spi_write NULL #endif +/* Primitive bulk write support for soc-cache. The data pointed to by `data' needs + * to already be in the form the hardware expects including any leading register specific + * data. Any data written through this function will not go through the cache as it + * only handles writing to volatile or out of bounds registers. + */ +static int snd_soc_hw_bulk_write_raw(struct snd_soc_codec *codec, unsigned int reg, + const void *data, size_t len) +{ + int ret; + + /* Ensure that the base register is volatile. Subsequently + * any other register that is touched by this routine should be + * volatile as well to ensure that we don't get out of sync with + * the cache. + */ + if (!snd_soc_codec_volatile_register(codec, reg) + && reg < codec->driver->reg_cache_size) + return -EINVAL; + + switch (codec->control_type) { + case SND_SOC_I2C: + ret = i2c_master_send(codec->control_data, data, len); + break; + case SND_SOC_SPI: + ret = do_spi_write(codec->control_data, data, len); + break; + default: + BUG(); + } + + if (ret == len) + return 0; + if (ret < 0) + return ret; + else + return -EIO; +} + static struct { int addr_bits; int data_bits; @@ -708,6 +746,7 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec, codec->write = io_types[i].write; codec->read = io_types[i].read; + codec->bulk_write_raw = snd_soc_hw_bulk_write_raw; switch (control) { case SND_SOC_CUSTOM: diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 4dda58926bc5..636328e868e8 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -2228,6 +2228,13 @@ unsigned int snd_soc_write(struct snd_soc_codec *codec, } EXPORT_SYMBOL_GPL(snd_soc_write); +unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec, + unsigned int reg, const void *data, size_t len) +{ + return codec->bulk_write_raw(codec, reg, data, len); +} +EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw); + /** * snd_soc_update_bits - update codec register bits * @codec: audio codec |