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Diffstat (limited to 'sound/soc/sunxi/sun4i-i2s.c')
-rw-r--r--sound/soc/sunxi/sun4i-i2s.c105
1 files changed, 87 insertions, 18 deletions
diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 687a8f83dbe5..f24d19526603 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -93,6 +93,9 @@ struct sun4i_i2s {
struct clk *mod_clk;
struct regmap *regmap;
+ unsigned int mclk_freq;
+
+ struct snd_dmaengine_dai_dma_data capture_dma_data;
struct snd_dmaengine_dai_dma_data playback_dma_data;
};
@@ -157,14 +160,24 @@ static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
}
static int sun4i_i2s_oversample_rates[] = { 128, 192, 256, 384, 512, 768 };
+static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sun4i_i2s_oversample_rates); i++)
+ if (sun4i_i2s_oversample_rates[i] == oversample)
+ return true;
+
+ return false;
+}
static int sun4i_i2s_set_clk_rate(struct sun4i_i2s *i2s,
unsigned int rate,
unsigned int word_size)
{
- unsigned int clk_rate;
+ unsigned int oversample_rate, clk_rate;
int bclk_div, mclk_div;
- int ret, i;
+ int ret;
switch (rate) {
case 176400:
@@ -196,21 +209,18 @@ static int sun4i_i2s_set_clk_rate(struct sun4i_i2s *i2s,
if (ret)
return ret;
- /* Always favor the highest oversampling rate */
- for (i = (ARRAY_SIZE(sun4i_i2s_oversample_rates) - 1); i >= 0; i--) {
- unsigned int oversample_rate = sun4i_i2s_oversample_rates[i];
-
- bclk_div = sun4i_i2s_get_bclk_div(i2s, oversample_rate,
- word_size);
- mclk_div = sun4i_i2s_get_mclk_div(i2s, oversample_rate,
- clk_rate,
- rate);
+ oversample_rate = i2s->mclk_freq / rate;
+ if (!sun4i_i2s_oversample_is_valid(oversample_rate))
+ return -EINVAL;
- if ((bclk_div >= 0) && (mclk_div >= 0))
- break;
- }
+ bclk_div = sun4i_i2s_get_bclk_div(i2s, oversample_rate,
+ word_size);
+ if (bclk_div < 0)
+ return -EINVAL;
- if ((bclk_div < 0) || (mclk_div < 0))
+ mclk_div = sun4i_i2s_get_mclk_div(i2s, oversample_rate,
+ clk_rate, rate);
+ if (mclk_div < 0)
return -EINVAL;
regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
@@ -341,6 +351,27 @@ 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 +393,18 @@ 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 +431,7 @@ 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 +440,7 @@ 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:
@@ -447,9 +490,23 @@ static void sun4i_i2s_shutdown(struct snd_pcm_substream *substream,
regmap_write(i2s->regmap, SUN4I_I2S_CTRL_REG, 0);
}
+static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ if (clk_id != 0)
+ return -EINVAL;
+
+ i2s->mclk_freq = freq;
+
+ return 0;
+}
+
static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
.hw_params = sun4i_i2s_hw_params,
.set_fmt = sun4i_i2s_set_fmt,
+ .set_sysclk = sun4i_i2s_set_sysclk,
.shutdown = sun4i_i2s_shutdown,
.startup = sun4i_i2s_startup,
.trigger = sun4i_i2s_trigger,
@@ -459,7 +516,9 @@ 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 +527,13 @@ 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 +696,9 @@ 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);