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-rw-r--r--sound/soc/dwc/designware_i2s.c9
-rw-r--r--sound/soc/dwc/designware_pcm.c97
-rw-r--r--sound/soc/dwc/local.h9
3 files changed, 92 insertions, 23 deletions
diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
index bdf8398cbc81..9c46e4112026 100644
--- a/sound/soc/dwc/designware_i2s.c
+++ b/sound/soc/dwc/designware_i2s.c
@@ -121,9 +121,14 @@ static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
irq_valid = true;
}
- /* Data available. Record mode not supported in PIO mode */
- if (isr[i] & ISR_RXDA)
+ /*
+ * Data available. Retrieve samples from FIFO
+ * NOTE: Only two channels supported
+ */
+ if ((isr[i] & ISR_RXDA) && (i == 0) && dev->use_pio) {
+ dw_pcm_pop_rx(dev);
irq_valid = true;
+ }
/* Error Handling: TX */
if (isr[i] & ISR_TXFO) {
diff --git a/sound/soc/dwc/designware_pcm.c b/sound/soc/dwc/designware_pcm.c
index 4a83a22fa3cb..b063c8601569 100644
--- a/sound/soc/dwc/designware_pcm.c
+++ b/sound/soc/dwc/designware_pcm.c
@@ -41,10 +41,33 @@ static unsigned int dw_pcm_tx_##sample_bits(struct dw_i2s_dev *dev, \
return tx_ptr; \
}
+#define dw_pcm_rx_fn(sample_bits) \
+static unsigned int dw_pcm_rx_##sample_bits(struct dw_i2s_dev *dev, \
+ struct snd_pcm_runtime *runtime, unsigned int rx_ptr, \
+ bool *period_elapsed) \
+{ \
+ u##sample_bits (*p)[2] = (void *)runtime->dma_area; \
+ unsigned int period_pos = rx_ptr % runtime->period_size; \
+ int i; \
+\
+ for (i = 0; i < dev->fifo_th; i++) { \
+ p[rx_ptr][0] = ioread32(dev->i2s_base + LRBR_LTHR(0)); \
+ p[rx_ptr][1] = ioread32(dev->i2s_base + RRBR_RTHR(0)); \
+ period_pos++; \
+ if (++rx_ptr >= runtime->buffer_size) \
+ rx_ptr = 0; \
+ } \
+ *period_elapsed = period_pos >= runtime->period_size; \
+ return rx_ptr; \
+}
+
dw_pcm_tx_fn(16);
dw_pcm_tx_fn(32);
+dw_pcm_rx_fn(16);
+dw_pcm_rx_fn(32);
#undef dw_pcm_tx_fn
+#undef dw_pcm_rx_fn
static const struct snd_pcm_hardware dw_pcm_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
@@ -68,27 +91,51 @@ static const struct snd_pcm_hardware dw_pcm_hardware = {
.fifo_size = 16,
};
-void dw_pcm_push_tx(struct dw_i2s_dev *dev)
+static void dw_pcm_transfer(struct dw_i2s_dev *dev, bool push)
{
- struct snd_pcm_substream *tx_substream;
- bool tx_active, period_elapsed;
+ struct snd_pcm_substream *substream;
+ bool active, period_elapsed;
rcu_read_lock();
- tx_substream = rcu_dereference(dev->tx_substream);
- tx_active = tx_substream && snd_pcm_running(tx_substream);
- if (tx_active) {
- unsigned int tx_ptr = READ_ONCE(dev->tx_ptr);
- unsigned int new_tx_ptr = dev->tx_fn(dev, tx_substream->runtime,
- tx_ptr, &period_elapsed);
- cmpxchg(&dev->tx_ptr, tx_ptr, new_tx_ptr);
+ if (push)
+ substream = rcu_dereference(dev->tx_substream);
+ else
+ substream = rcu_dereference(dev->rx_substream);
+ active = substream && snd_pcm_running(substream);
+ if (active) {
+ unsigned int ptr;
+ unsigned int new_ptr;
+
+ if (push) {
+ ptr = READ_ONCE(dev->tx_ptr);
+ new_ptr = dev->tx_fn(dev, substream->runtime, ptr,
+ &period_elapsed);
+ cmpxchg(&dev->tx_ptr, ptr, new_ptr);
+ } else {
+ ptr = READ_ONCE(dev->rx_ptr);
+ new_ptr = dev->rx_fn(dev, substream->runtime, ptr,
+ &period_elapsed);
+ cmpxchg(&dev->rx_ptr, ptr, new_ptr);
+ }
if (period_elapsed)
- snd_pcm_period_elapsed(tx_substream);
+ snd_pcm_period_elapsed(substream);
}
rcu_read_unlock();
}
+
+void dw_pcm_push_tx(struct dw_i2s_dev *dev)
+{
+ dw_pcm_transfer(dev, true);
+}
EXPORT_SYMBOL_GPL(dw_pcm_push_tx);
+void dw_pcm_pop_rx(struct dw_i2s_dev *dev)
+{
+ dw_pcm_transfer(dev, false);
+}
+EXPORT_SYMBOL_GPL(dw_pcm_pop_rx);
+
static int dw_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
@@ -126,20 +173,17 @@ static int dw_pcm_hw_params(struct snd_pcm_substream *substream,
switch (params_format(hw_params)) {
case SNDRV_PCM_FORMAT_S16_LE:
dev->tx_fn = dw_pcm_tx_16;
+ dev->rx_fn = dw_pcm_rx_16;
break;
case SNDRV_PCM_FORMAT_S32_LE:
dev->tx_fn = dw_pcm_tx_32;
+ dev->rx_fn = dw_pcm_rx_32;
break;
default:
dev_err(dev->dev, "invalid format\n");
return -EINVAL;
}
- if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) {
- dev_err(dev->dev, "only playback is available\n");
- return -EINVAL;
- }
-
ret = snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
if (ret < 0)
@@ -163,13 +207,21 @@ static int dw_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- WRITE_ONCE(dev->tx_ptr, 0);
- rcu_assign_pointer(dev->tx_substream, substream);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ WRITE_ONCE(dev->tx_ptr, 0);
+ rcu_assign_pointer(dev->tx_substream, substream);
+ } else {
+ WRITE_ONCE(dev->rx_ptr, 0);
+ rcu_assign_pointer(dev->rx_substream, substream);
+ }
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- rcu_assign_pointer(dev->tx_substream, NULL);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ rcu_assign_pointer(dev->tx_substream, NULL);
+ else
+ rcu_assign_pointer(dev->rx_substream, NULL);
break;
default:
ret = -EINVAL;
@@ -183,7 +235,12 @@ static snd_pcm_uframes_t dw_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct dw_i2s_dev *dev = runtime->private_data;
- snd_pcm_uframes_t pos = READ_ONCE(dev->tx_ptr);
+ snd_pcm_uframes_t pos;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ pos = READ_ONCE(dev->tx_ptr);
+ else
+ pos = READ_ONCE(dev->rx_ptr);
return pos < runtime->buffer_size ? pos : 0;
}
diff --git a/sound/soc/dwc/local.h b/sound/soc/dwc/local.h
index 68afd7577343..91dc70a826f8 100644
--- a/sound/soc/dwc/local.h
+++ b/sound/soc/dwc/local.h
@@ -105,20 +105,27 @@ struct dw_i2s_dev {
struct i2s_clk_config_data config;
int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
- /* data related to PIO transfers (TX) */
+ /* data related to PIO transfers */
bool use_pio;
struct snd_pcm_substream __rcu *tx_substream;
+ struct snd_pcm_substream __rcu *rx_substream;
unsigned int (*tx_fn)(struct dw_i2s_dev *dev,
struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
bool *period_elapsed);
+ unsigned int (*rx_fn)(struct dw_i2s_dev *dev,
+ struct snd_pcm_runtime *runtime, unsigned int rx_ptr,
+ bool *period_elapsed);
unsigned int tx_ptr;
+ unsigned int rx_ptr;
};
#if IS_ENABLED(CONFIG_SND_DESIGNWARE_PCM)
void dw_pcm_push_tx(struct dw_i2s_dev *dev);
+void dw_pcm_pop_rx(struct dw_i2s_dev *dev);
int dw_pcm_register(struct platform_device *pdev);
#else
void dw_pcm_push_tx(struct dw_i2s_dev *dev) { }
+void dw_pcm_pop_rx(struct dw_i2s_dev *dev) { }
int dw_pcm_register(struct platform_device *pdev)
{
return -EINVAL;
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-29 10:11:24 +0000