Ensure that all drivers that use SPI and I2C will work properly by providing SPI write functions for all different I/O types.

Signed-off-by: Dimitris Papastamos dp@opensource.wolfsonmicro.com --- sound/soc/soc-cache.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 96 insertions(+), 0 deletions(-)

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c index 62f1e2b..d214f02 100644 --- a/sound/soc/soc-cache.c +++ b/sound/soc/soc-cache.c @@ -211,6 +211,36 @@ static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec, return cache[reg]; }

+#if defined(CONFIG_SPI_MASTER) +static int snd_soc_8_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[2]; + + if (len <= 0) + return 0; + + msg[0] = data[0]; + msg[1] = data[1]; + + 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_8_8_spi_write NULL +#endif + static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { @@ -254,6 +284,37 @@ static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec, } }

+#if defined(CONFIG_SPI_MASTER) +static int snd_soc_8_16_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_8_16_spi_write NULL +#endif + #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) static unsigned int snd_soc_8_8_read_i2c(struct snd_soc_codec *codec, unsigned int r) @@ -518,6 +579,38 @@ static int snd_soc_16_16_write(struct snd_soc_codec *codec, unsigned int reg, return -EIO; }

+#if defined(CONFIG_SPI_MASTER) +static int snd_soc_16_16_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[4]; + + if (len <= 0) + return 0; + + msg[0] = data[0]; + msg[1] = data[1]; + msg[2] = data[2]; + msg[3] = data[3]; + + 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_16_spi_write NULL +#endif + static struct { int addr_bits; int data_bits; @@ -540,11 +633,13 @@ static struct { .addr_bits = 8, .data_bits = 8, .write = snd_soc_8_8_write, .read = snd_soc_8_8_read, .i2c_read = snd_soc_8_8_read_i2c, + .spi_write = snd_soc_8_8_spi_write, }, { .addr_bits = 8, .data_bits = 16, .write = snd_soc_8_16_write, .read = snd_soc_8_16_read, .i2c_read = snd_soc_8_16_read_i2c, + .spi_write = snd_soc_8_16_spi_write, }, { .addr_bits = 16, .data_bits = 8, @@ -556,6 +651,7 @@ static struct { .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, + .spi_write = snd_soc_16_16_spi_write, }, };