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ASoC: Add 16/16 registers to soc-cache 

I2C only at the minute.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2010-03-05 16:27:15 +00:00
parent 1ca7578043
commit bc6552f471
1 changed files with 83 additions and 0 deletions
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83
sound/soc/soc-cache.c
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@ -366,6 +366,84 @@ static int snd_soc_16_8_spi_write(void *control_data, const char *data,
#define snd_soc_16_8_spi_write NULL
#endif
#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
static unsigned int snd_soc_16_16_read_i2c(struct snd_soc_codec *codec,
unsigned int r)
{
struct i2c_msg xfer[2];
u16 reg = cpu_to_be16(r);
u16 data;
int ret;
struct i2c_client *client = codec->control_data;
/* Write register */
xfer[0].addr = client->addr;
xfer[0].flags = 0;
xfer[0].len = 2;
xfer[0].buf = (u8 *)&reg;
/* Read data */
xfer[1].addr = client->addr;
xfer[1].flags = I2C_M_RD;
xfer[1].len = 2;
xfer[1].buf = (u8 *)&data;
ret = i2c_transfer(client->adapter, xfer, 2);
if (ret != 2) {
dev_err(&client->dev, "i2c_transfer() returned %d\n", ret);
return 0;
}
return be16_to_cpu(data);
}
#else
#define snd_soc_16_16_read_i2c NULL
#endif
static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
if (reg >= codec->reg_cache_size ||
snd_soc_codec_volatile_register(codec, reg)) {
if (codec->cache_only)
return -EINVAL;
return codec->hw_read(codec, reg);
}
return cache[reg];
}
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;
data[0] = (reg >> 8) & 0xff;
data[1] = reg & 0xff;
data[2] = (value >> 8) & 0xff;
data[3] = value & 0xff;
if (reg < codec->reg_cache_size)
cache[reg] = value;
if (codec->cache_only) {
codec->cache_sync = 1;
return 0;
}
ret = codec->hw_write(codec->control_data, data, 4);
if (ret == 4)
return 0;
if (ret < 0)
return ret;
else
return -EIO;
}
static struct {
int addr_bits;
@ -400,6 +478,11 @@ static struct {
.i2c_read = snd_soc_16_8_read_i2c,
.spi_write = snd_soc_16_8_spi_write,
},
{
.addr_bits = 16, .data_bits = 16,
.write = snd_soc_16_16_write, .read = snd_soc_16_16_read,
.i2c_read = snd_soc_16_16_read_i2c,
},
};
/**