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>

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 5869dc3be7815cc6cbadb03165c2f9d84d4dae86..bf593a834f5ac2aa16aae9600bcfdc3953a4ffb1 100644 (file)
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -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 *)®
+
+       /* 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,
+       },
 };
 
 /**