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ASoC: ad1938: use soc-cache framework for codec registers access

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Signed-off-by: Barry Song <Barry.Song@analog.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Barry Song
2010-01-27 11:46:18 +08:00
committed by Mark Brown
parent 63b62ab0d5
commit 994dc4245d
2 changed files with 144 additions and 128 deletions
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108
sound/soc/soc-cache.c
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@@ -233,6 +233,108 @@ static unsigned int snd_soc_8_16_read_i2c(struct snd_soc_codec *codec,
#define snd_soc_8_16_read_i2c NULL
#endif
#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
static unsigned int snd_soc_16_8_read_i2c(struct snd_soc_codec *codec,
unsigned int r)
{
struct i2c_msg xfer[2];
u16 reg = r;
u8 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 = 1;
xfer[1].buf = &data;
ret = i2c_transfer(client->adapter, xfer, 2);
if (ret != 2) {
dev_err(&client->dev, "i2c_transfer() returned %d\n", ret);
return 0;
}
return data;
}
#else
#define snd_soc_16_8_read_i2c NULL
#endif
static unsigned int snd_soc_16_8_read(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
reg &= 0xff;
if (reg >= codec->reg_cache_size)
return -1;
return cache[reg];
}
static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
u16 *cache = codec->reg_cache;
u8 data[3];
int ret;
BUG_ON(codec->volatile_register);
data[0] = (reg >> 8) & 0xff;
data[1] = reg & 0xff;
data[2] = value;
reg &= 0xff;
if (reg < codec->reg_cache_size)
cache[reg] = value;
ret = codec->hw_write(codec->control_data, data, 3);
if (ret == 3)
return 0;
if (ret < 0)
return ret;
else
return -EIO;
}
#if defined(CONFIG_SPI_MASTER)
static int snd_soc_16_8_spi_write(void *control_data, const char *data,
int len)
{
struct spi_device *spi = control_data;
struct spi_transfer t;
struct spi_message m;
u8 msg[3];
if (len <= 0)
return 0;
msg[0] = data[0];
msg[1] = data[1];
msg[2] = data[2];
spi_message_init(&m);
memset(&t, 0, (sizeof t));
t.tx_buf = &msg[0];
t.len = len;
spi_message_add_tail(&t, &m);
spi_sync(spi, &m);
return len;
}
#else
#define snd_soc_16_8_spi_write NULL
#endif
static struct {
int addr_bits;
int data_bits;
@@ -260,6 +362,12 @@ static struct {
.write = snd_soc_8_16_write, .read = snd_soc_8_16_read,
.i2c_read = snd_soc_8_16_read_i2c,
},
{
.addr_bits = 16, .data_bits = 8,
.write = snd_soc_16_8_write, .read = snd_soc_16_8_read,
.i2c_read = snd_soc_16_8_read_i2c,
.spi_write = snd_soc_16_8_spi_write,
},
};
/**