ASoC: soc-cache: Add spi_write support for all I/O types

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>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 62f1e2b776c47bc25ea394cdfd140dd7f424d454..d214f02cbb65a46314a121948525cb2b005734e1 100644 (file)
--- 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,
        },
 };