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Diffstat (limited to 'sound/soc/sh/rz-ssi.c')
-rw-r--r--sound/soc/sh/rz-ssi.c109
1 files changed, 54 insertions, 55 deletions
diff --git a/sound/soc/sh/rz-ssi.c b/sound/soc/sh/rz-ssi.c
index e8d98b362f9d..e8edaed05d4c 100644
--- a/sound/soc/sh/rz-ssi.c
+++ b/sound/soc/sh/rz-ssi.c
@@ -28,8 +28,6 @@
/* SSI REGISTER BITS */
#define SSICR_DWL(x) (((x) & 0x7) << 19)
#define SSICR_SWL(x) (((x) & 0x7) << 16)
-#define SSICR_MST BIT(14)
-#define SSICR_CKDV(x) (((x) & 0xf) << 4)
#define SSICR_CKS BIT(30)
#define SSICR_TUIEN BIT(29)
@@ -188,26 +186,36 @@ static inline bool rz_ssi_is_dma_enabled(struct rz_ssi_priv *ssi)
return (ssi->playback.dma_ch && (ssi->dma_rt || ssi->capture.dma_ch));
}
-static int rz_ssi_stream_is_valid(struct rz_ssi_priv *ssi,
- struct rz_ssi_stream *strm)
+static void rz_ssi_set_substream(struct rz_ssi_stream *strm,
+ struct snd_pcm_substream *substream)
{
+ struct rz_ssi_priv *ssi = strm->priv;
unsigned long flags;
- int ret;
spin_lock_irqsave(&ssi->lock, flags);
- ret = !!(strm->substream && strm->substream->runtime);
+ strm->substream = substream;
+ spin_unlock_irqrestore(&ssi->lock, flags);
+}
+
+static bool rz_ssi_stream_is_valid(struct rz_ssi_priv *ssi,
+ struct rz_ssi_stream *strm)
+{
+ unsigned long flags;
+ bool ret;
+
+ spin_lock_irqsave(&ssi->lock, flags);
+ ret = strm->substream && strm->substream->runtime;
spin_unlock_irqrestore(&ssi->lock, flags);
return ret;
}
-static int rz_ssi_stream_init(struct rz_ssi_priv *ssi,
- struct rz_ssi_stream *strm,
- struct snd_pcm_substream *substream)
+static void rz_ssi_stream_init(struct rz_ssi_stream *strm,
+ struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
- strm->substream = substream;
+ rz_ssi_set_substream(strm, substream);
strm->sample_width = samples_to_bytes(runtime, 1);
strm->dma_buffer_pos = 0;
strm->period_counter = 0;
@@ -219,19 +227,14 @@ static int rz_ssi_stream_init(struct rz_ssi_priv *ssi,
/* fifo init */
strm->fifo_sample_size = SSI_FIFO_DEPTH;
-
- return 0;
}
static void rz_ssi_stream_quit(struct rz_ssi_priv *ssi,
struct rz_ssi_stream *strm)
{
struct snd_soc_dai *dai = rz_ssi_get_dai(strm->substream);
- unsigned long flags;
- spin_lock_irqsave(&ssi->lock, flags);
- strm->substream = NULL;
- spin_unlock_irqrestore(&ssi->lock, flags);
+ rz_ssi_set_substream(strm, NULL);
if (strm->oerr_num > 0)
dev_info(dai->dev, "overrun = %d\n", strm->oerr_num);
@@ -414,51 +417,48 @@ static int rz_ssi_pio_recv(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)
u16 *buf;
int fifo_samples;
int frames_left;
- int samples = 0;
+ int samples;
int i;
if (!rz_ssi_stream_is_valid(ssi, strm))
return -EINVAL;
runtime = substream->runtime;
- /* frames left in this period */
- frames_left = runtime->period_size - (strm->buffer_pos %
- runtime->period_size);
- if (frames_left == 0)
- frames_left = runtime->period_size;
- /* Samples in RX FIFO */
- fifo_samples = (rz_ssi_reg_readl(ssi, SSIFSR) >>
- SSIFSR_RDC_SHIFT) & SSIFSR_RDC_MASK;
+ do {
+ /* frames left in this period */
+ frames_left = runtime->period_size -
+ (strm->buffer_pos % runtime->period_size);
+ if (!frames_left)
+ frames_left = runtime->period_size;
+
+ /* Samples in RX FIFO */
+ fifo_samples = (rz_ssi_reg_readl(ssi, SSIFSR) >>
+ SSIFSR_RDC_SHIFT) & SSIFSR_RDC_MASK;
+
+ /* Only read full frames at a time */
+ samples = 0;
+ while (frames_left && (fifo_samples >= runtime->channels)) {
+ samples += runtime->channels;
+ fifo_samples -= runtime->channels;
+ frames_left--;
+ }
- /* Only read full frames at a time */
- while (frames_left && (fifo_samples >= runtime->channels)) {
- samples += runtime->channels;
- fifo_samples -= runtime->channels;
- frames_left--;
- }
+ /* not enough samples yet */
+ if (!samples)
+ break;
- /* not enough samples yet */
- if (samples == 0)
- return 0;
+ /* calculate new buffer index */
+ buf = (u16 *)runtime->dma_area;
+ buf += strm->buffer_pos * runtime->channels;
- /* calculate new buffer index */
- buf = (u16 *)(runtime->dma_area);
- buf += strm->buffer_pos * runtime->channels;
+ /* Note, only supports 16-bit samples */
+ for (i = 0; i < samples; i++)
+ *buf++ = (u16)(rz_ssi_reg_readl(ssi, SSIFRDR) >> 16);
- /* Note, only supports 16-bit samples */
- for (i = 0; i < samples; i++)
- *buf++ = (u16)(rz_ssi_reg_readl(ssi, SSIFRDR) >> 16);
-
- rz_ssi_reg_mask_setl(ssi, SSIFSR, SSIFSR_RDF, 0);
- rz_ssi_pointer_update(strm, samples / runtime->channels);
-
- /*
- * If we finished this period, but there are more samples in
- * the RX FIFO, call this function again
- */
- if (frames_left == 0 && fifo_samples >= runtime->channels)
- rz_ssi_pio_recv(ssi, strm);
+ rz_ssi_reg_mask_setl(ssi, SSIFSR, SSIFSR_RDF, 0);
+ rz_ssi_pointer_update(strm, samples / runtime->channels);
+ } while (!frames_left && fifo_samples >= runtime->channels);
return 0;
}
@@ -726,9 +726,7 @@ static int rz_ssi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
rz_ssi_reg_mask_setl(ssi, SSIFCR, SSIFCR_SSIRST, 0);
udelay(5);
- ret = rz_ssi_stream_init(ssi, strm, substream);
- if (ret)
- goto done;
+ rz_ssi_stream_init(strm, substream);
if (ssi->dma_rt) {
bool is_playback;
@@ -975,6 +973,9 @@ static int rz_ssi_probe(struct platform_device *pdev)
ssi->playback.priv = ssi;
ssi->capture.priv = ssi;
+ spin_lock_init(&ssi->lock);
+ dev_set_drvdata(&pdev->dev, ssi);
+
/* Error Interrupt */
ssi->irq_int = platform_get_irq_byname(pdev, "int_req");
if (ssi->irq_int < 0)
@@ -1027,8 +1028,6 @@ static int rz_ssi_probe(struct platform_device *pdev)
return dev_err_probe(ssi->dev, ret, "pm_runtime_resume_and_get failed\n");
}
- spin_lock_init(&ssi->lock);
- dev_set_drvdata(&pdev->dev, ssi);
ret = devm_snd_soc_register_component(&pdev->dev, &rz_ssi_soc_component,
rz_ssi_soc_dai,
ARRAY_SIZE(rz_ssi_soc_dai));
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-18 05:09:44 +0000