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authorMaxime Ripard <maxime.ripard@free-electrons.com>2016-11-03 17:27:05 +0100
committerMark Brown <broonie@kernel.org>2016-11-03 10:54:19 -0600
commitae73b34f66f629ab1986673e8e069342c09e3168 (patch)
tree00d8f7a455232e166292b6ca5bf5ef322609cdc7
parent85915b63ad8b796848f431b66c9ba5e356e722e5 (diff)
ASoC: sun4i-i2s: Implement capture support
The i2s driver was only implementing playback for now. Implement capture to make sure that's not a limitation anymore. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--sound/soc/sunxi/sun4i-i2s.c52
1 files changed, 49 insertions, 3 deletions
diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 687a8f8..a765311 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -93,6 +93,7 @@ struct sun4i_i2s {
struct clk *mod_clk;
struct regmap *regmap;
+ struct snd_dmaengine_dai_dma_data capture_dma_data;
struct snd_dmaengine_dai_dma_data playback_dma_data;
};
@@ -341,6 +342,27 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
return 0;
}
+static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
+{
+ /* Flush RX FIFO */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
+ SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
+ SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
+
+ /* Clear RX counter */
+ regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
+
+ /* Enable RX Block */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_RX_EN,
+ SUN4I_I2S_CTRL_RX_EN);
+
+ /* Enable RX DRQ */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
+ SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
+ SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN);
+}
+
static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
{
/* Flush TX FIFO */
@@ -362,6 +384,18 @@ static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN);
}
+static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s)
+{
+ /* Disable RX Block */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_RX_EN,
+ 0);
+
+ /* Disable RX DRQ */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
+ SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
+ 0);
+}
static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s)
{
@@ -388,7 +422,7 @@ static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
sun4i_i2s_start_playback(i2s);
else
- return -EINVAL;
+ sun4i_i2s_start_capture(i2s);
break;
case SNDRV_PCM_TRIGGER_STOP:
@@ -397,7 +431,7 @@ static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
sun4i_i2s_stop_playback(i2s);
else
- return -EINVAL;
+ sun4i_i2s_stop_capture(i2s);
break;
default:
@@ -459,7 +493,9 @@ static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
{
struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, NULL);
+ snd_soc_dai_init_dma_data(dai,
+ &i2s->playback_dma_data,
+ &i2s->capture_dma_data);
snd_soc_dai_set_drvdata(dai, i2s);
@@ -468,6 +504,13 @@ static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
static struct snd_soc_dai_driver sun4i_i2s_dai = {
.probe = sun4i_i2s_dai_probe,
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
.playback = {
.stream_name = "Playback",
.channels_min = 2,
@@ -630,6 +673,9 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
i2s->playback_dma_data.addr = res->start + SUN4I_I2S_FIFO_TX_REG;
i2s->playback_dma_data.maxburst = 4;
+ i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
+ i2s->capture_dma_data.maxburst = 4;
+
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = sun4i_i2s_runtime_resume(&pdev->dev);