#define SUN4I_I2S_TX_CNT_REG 0x2c
#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
-#define SUN4I_I2S_TX_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
+#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
* @sun4i_i2s_regmap: regmap config to use.
* @mclk_offset: Value by which mclkdiv needs to be adjusted.
* @bclk_offset: Value by which bclkdiv needs to be adjusted.
+ * @field_txchanmap: location of the tx channel mapping register.
+ * @field_rxchanmap: location of the rx channel mapping register.
+ * @field_txchansel: location of the tx channel select bit fields.
+ * @field_rxchansel: location of the rx channel select bit fields.
*/
struct sun4i_i2s_quirks {
bool has_reset;
const struct regmap_config *sun4i_i2s_regmap;
unsigned int mclk_offset;
unsigned int bclk_offset;
+
+ /* Register fields for i2s */
+ struct reg_field field_txchanmap;
+ struct reg_field field_rxchanmap;
+ struct reg_field field_txchansel;
+ struct reg_field field_rxchansel;
};
struct sun4i_i2s {
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct snd_dmaengine_dai_dma_data playback_dma_data;
+ /* Register fields for i2s */
+ struct regmap_field *field_txchanmap;
+ struct regmap_field *field_rxchanmap;
+ struct regmap_field *field_txchansel;
+ struct regmap_field *field_rxchansel;
+
const struct sun4i_i2s_quirks *variant;
};
if (params_channels(params) != 2)
return -EINVAL;
+ /* Map the channels for playback and capture */
+ regmap_field_write(i2s->field_txchanmap, 0x76543210);
+ regmap_field_write(i2s->field_rxchanmap, 0x00003210);
+
+ /* Configure the channels */
+ regmap_field_write(i2s->field_txchansel,
+ SUN4I_I2S_CHAN_SEL(params_channels(params)));
+
+ regmap_field_write(i2s->field_rxchansel,
+ SUN4I_I2S_CHAN_SEL(params_channels(params)));
+
switch (params_physical_width(params)) {
case 16:
width = DMA_SLAVE_BUSWIDTH_2_BYTES;
SUN4I_I2S_CTRL_SDO_EN_MASK,
SUN4I_I2S_CTRL_SDO_EN(0));
- /* Enable the first two channels */
- regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_SEL_REG,
- SUN4I_I2S_TX_CHAN_SEL(2));
-
- /* Map them to the two first samples coming in */
- regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_MAP_REG,
- SUN4I_I2S_TX_CHAN_MAP(0, 0) | SUN4I_I2S_TX_CHAN_MAP(1, 1));
return clk_prepare_enable(i2s->mod_clk);
}
.has_reset = false,
.reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
.sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
+ .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
+ .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
+ .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
+ .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
};
static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
.has_reset = true,
.reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
.sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
+ .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
+ .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
+ .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
+ .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
};
+static int sun4i_i2s_init_regmap_fields(struct device *dev,
+ struct sun4i_i2s *i2s)
+{
+ i2s->field_txchanmap =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_txchanmap);
+ if (IS_ERR(i2s->field_txchanmap))
+ return PTR_ERR(i2s->field_txchanmap);
+
+ i2s->field_rxchanmap =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_rxchanmap);
+ if (IS_ERR(i2s->field_rxchanmap))
+ return PTR_ERR(i2s->field_rxchanmap);
+
+ i2s->field_txchansel =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_txchansel);
+ if (IS_ERR(i2s->field_txchansel))
+ return PTR_ERR(i2s->field_txchansel);
+
+ i2s->field_rxchansel =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_rxchansel);
+ return PTR_ERR_OR_ZERO(i2s->field_rxchansel);
+}
+
static int sun4i_i2s_probe(struct platform_device *pdev)
{
struct sun4i_i2s *i2s;
goto err_suspend;
}
+ ret = sun4i_i2s_init_regmap_fields(&pdev->dev, i2s);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not initialise regmap fields\n");
+ goto err_suspend;
+ }
+
return 0;
err_suspend: