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

[mv-sheeva.git] / sound / soc / soc-cache.c

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index cde7b63de113c487cfa102143693e08d9f62855e..097e33510a7a0120e3b6cc4474a75ac0a5e72766 100644 (file)
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -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 *)®
+
+       /* 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,
+       },
 };
 
 /**