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path: root/sound/soc/kirkwood/kirkwood-dma.c
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Diffstat (limited to 'sound/soc/kirkwood/kirkwood-dma.c')
-rw-r--r--sound/soc/kirkwood/kirkwood-dma.c108
1 files changed, 24 insertions, 84 deletions
diff --git a/sound/soc/kirkwood/kirkwood-dma.c b/sound/soc/kirkwood/kirkwood-dma.c
index a9f14530c3d..b238434f92b 100644
--- a/sound/soc/kirkwood/kirkwood-dma.c
+++ b/sound/soc/kirkwood/kirkwood-dma.c
@@ -33,11 +33,11 @@
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | \
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE)
-struct kirkwood_dma_priv {
- struct snd_pcm_substream *play_stream;
- struct snd_pcm_substream *rec_stream;
- struct kirkwood_dma_data *data;
-};
+static struct kirkwood_dma_data *kirkwood_priv(struct snd_pcm_substream *subs)
+{
+ struct snd_soc_pcm_runtime *soc_runtime = subs->private_data;
+ return snd_soc_dai_get_drvdata(soc_runtime->cpu_dai);
+}
static struct snd_pcm_hardware kirkwood_dma_snd_hw = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
@@ -51,7 +51,7 @@ static struct snd_pcm_hardware kirkwood_dma_snd_hw = {
.rate_max = 384000,
.channels_min = 1,
.channels_max = 8,
- .buffer_bytes_max = KIRKWOOD_SND_MAX_PERIOD_BYTES * KIRKWOOD_SND_MAX_PERIODS,
+ .buffer_bytes_max = KIRKWOOD_SND_MAX_BUFFER_BYTES,
.period_bytes_min = KIRKWOOD_SND_MIN_PERIOD_BYTES,
.period_bytes_max = KIRKWOOD_SND_MAX_PERIOD_BYTES,
.periods_min = KIRKWOOD_SND_MIN_PERIODS,
@@ -63,8 +63,7 @@ static u64 kirkwood_dma_dmamask = DMA_BIT_MASK(32);
static irqreturn_t kirkwood_dma_irq(int irq, void *dev_id)
{
- struct kirkwood_dma_priv *prdata = dev_id;
- struct kirkwood_dma_data *priv = prdata->data;
+ struct kirkwood_dma_data *priv = dev_id;
unsigned long mask, status, cause;
mask = readl(priv->io + KIRKWOOD_INT_MASK);
@@ -89,10 +88,10 @@ static irqreturn_t kirkwood_dma_irq(int irq, void *dev_id)
writel(status, priv->io + KIRKWOOD_INT_CAUSE);
if (status & KIRKWOOD_INT_CAUSE_PLAY_BYTES)
- snd_pcm_period_elapsed(prdata->play_stream);
+ snd_pcm_period_elapsed(priv->substream_play);
if (status & KIRKWOOD_INT_CAUSE_REC_BYTES)
- snd_pcm_period_elapsed(prdata->rec_stream);
+ snd_pcm_period_elapsed(priv->substream_rec);
return IRQ_HANDLED;
}
@@ -126,15 +125,10 @@ static int kirkwood_dma_open(struct snd_pcm_substream *substream)
{
int err;
struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
- struct snd_soc_platform *platform = soc_runtime->platform;
- struct snd_soc_dai *cpu_dai = soc_runtime->cpu_dai;
- struct kirkwood_dma_data *priv;
- struct kirkwood_dma_priv *prdata = snd_soc_platform_get_drvdata(platform);
+ struct kirkwood_dma_data *priv = kirkwood_priv(substream);
const struct mbus_dram_target_info *dram;
unsigned long addr;
- priv = snd_soc_dai_get_dma_data(cpu_dai, substream);
snd_soc_set_runtime_hwparams(substream, &kirkwood_dma_snd_hw);
/* Ensure that all constraints linked to dma burst are fulfilled */
@@ -157,21 +151,11 @@ static int kirkwood_dma_open(struct snd_pcm_substream *substream)
if (err < 0)
return err;
- if (prdata == NULL) {
- prdata = kzalloc(sizeof(struct kirkwood_dma_priv), GFP_KERNEL);
- if (prdata == NULL)
- return -ENOMEM;
-
- prdata->data = priv;
-
+ if (!priv->substream_play && !priv->substream_rec) {
err = request_irq(priv->irq, kirkwood_dma_irq, IRQF_SHARED,
- "kirkwood-i2s", prdata);
- if (err) {
- kfree(prdata);
+ "kirkwood-i2s", priv);
+ if (err)
return -EBUSY;
- }
-
- snd_soc_platform_set_drvdata(platform, prdata);
/*
* Enable Error interrupts. We're only ack'ing them but
@@ -183,11 +167,11 @@ static int kirkwood_dma_open(struct snd_pcm_substream *substream)
dram = mv_mbus_dram_info();
addr = substream->dma_buffer.addr;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- prdata->play_stream = substream;
+ priv->substream_play = substream;
kirkwood_dma_conf_mbus_windows(priv->io,
KIRKWOOD_PLAYBACK_WIN, addr, dram);
} else {
- prdata->rec_stream = substream;
+ priv->substream_rec = substream;
kirkwood_dma_conf_mbus_windows(priv->io,
KIRKWOOD_RECORD_WIN, addr, dram);
}
@@ -197,27 +181,19 @@ static int kirkwood_dma_open(struct snd_pcm_substream *substream)
static int kirkwood_dma_close(struct snd_pcm_substream *substream)
{
- struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
- struct snd_soc_dai *cpu_dai = soc_runtime->cpu_dai;
- struct snd_soc_platform *platform = soc_runtime->platform;
- struct kirkwood_dma_priv *prdata = snd_soc_platform_get_drvdata(platform);
- struct kirkwood_dma_data *priv;
-
- priv = snd_soc_dai_get_dma_data(cpu_dai, substream);
+ struct kirkwood_dma_data *priv = kirkwood_priv(substream);
- if (!prdata || !priv)
+ if (!priv)
return 0;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- prdata->play_stream = NULL;
+ priv->substream_play = NULL;
else
- prdata->rec_stream = NULL;
+ priv->substream_rec = NULL;
- if (!prdata->play_stream && !prdata->rec_stream) {
+ if (!priv->substream_play && !priv->substream_rec) {
writel(0, priv->io + KIRKWOOD_ERR_MASK);
- free_irq(priv->irq, prdata);
- kfree(prdata);
- snd_soc_platform_set_drvdata(platform, NULL);
+ free_irq(priv->irq, priv);
}
return 0;
@@ -243,13 +219,9 @@ static int kirkwood_dma_hw_free(struct snd_pcm_substream *substream)
static int kirkwood_dma_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
- struct snd_soc_dai *cpu_dai = soc_runtime->cpu_dai;
- struct kirkwood_dma_data *priv;
+ struct kirkwood_dma_data *priv = kirkwood_priv(substream);
unsigned long size, count;
- priv = snd_soc_dai_get_dma_data(cpu_dai, substream);
-
/* compute buffer size in term of "words" as requested in specs */
size = frames_to_bytes(runtime, runtime->buffer_size);
size = (size>>2)-1;
@@ -272,13 +244,9 @@ static int kirkwood_dma_prepare(struct snd_pcm_substream *substream)
static snd_pcm_uframes_t kirkwood_dma_pointer(struct snd_pcm_substream
*substream)
{
- struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
- struct snd_soc_dai *cpu_dai = soc_runtime->cpu_dai;
- struct kirkwood_dma_data *priv;
+ struct kirkwood_dma_data *priv = kirkwood_priv(substream);
snd_pcm_uframes_t count;
- priv = snd_soc_dai_get_dma_data(cpu_dai, substream);
-
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
count = bytes_to_frames(substream->runtime,
readl(priv->io + KIRKWOOD_PLAY_BYTE_COUNT));
@@ -366,36 +334,8 @@ static void kirkwood_dma_free_dma_buffers(struct snd_pcm *pcm)
}
}
-static struct snd_soc_platform_driver kirkwood_soc_platform = {
+struct snd_soc_platform_driver kirkwood_soc_platform = {
.ops = &kirkwood_dma_ops,
.pcm_new = kirkwood_dma_new,
.pcm_free = kirkwood_dma_free_dma_buffers,
};
-
-static int kirkwood_soc_platform_probe(struct platform_device *pdev)
-{
- return snd_soc_register_platform(&pdev->dev, &kirkwood_soc_platform);
-}
-
-static int kirkwood_soc_platform_remove(struct platform_device *pdev)
-{
- snd_soc_unregister_platform(&pdev->dev);
- return 0;
-}
-
-static struct platform_driver kirkwood_pcm_driver = {
- .driver = {
- .name = "kirkwood-pcm-audio",
- .owner = THIS_MODULE,
- },
-
- .probe = kirkwood_soc_platform_probe,
- .remove = kirkwood_soc_platform_remove,
-};
-
-module_platform_driver(kirkwood_pcm_driver);
-
-MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
-MODULE_DESCRIPTION("Marvell Kirkwood Audio DMA module");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:kirkwood-pcm-audio");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-21 10:06:54 +0000