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>

1 files changed, 96 insertions, 0 deletions

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 62f1e2b776c4..d214f02cbb65 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,
         },
 };