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path: root/sound/soc/loongson/loongson_i2s.c
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Diffstat (limited to 'sound/soc/loongson/loongson_i2s.c')
-rw-r--r--sound/soc/loongson/loongson_i2s.c121
1 files changed, 64 insertions, 57 deletions
diff --git a/sound/soc/loongson/loongson_i2s.c b/sound/soc/loongson/loongson_i2s.c
index d45228a3a558..e336656e13eb 100644
--- a/sound/soc/loongson/loongson_i2s.c
+++ b/sound/soc/loongson/loongson_i2s.c
@@ -9,6 +9,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
+#include <linux/export.h>
#include <linux/pm_runtime.h>
#include <linux/dma-mapping.h>
#include <sound/soc.h>
@@ -21,34 +22,33 @@
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE)
+#define LOONGSON_I2S_TX_ENABLE (I2S_CTRL_TX_EN | I2S_CTRL_TX_DMA_EN)
+#define LOONGSON_I2S_RX_ENABLE (I2S_CTRL_RX_EN | I2S_CTRL_RX_DMA_EN)
+
+#define LOONGSON_I2S_DEF_DELAY 10
+#define LOONGSON_I2S_DEF_TIMEOUT 500000
+
static int loongson_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct loongson_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+ unsigned int mask;
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- regmap_update_bits(i2s->regmap, LS_I2S_CTRL,
- I2S_CTRL_TX_EN | I2S_CTRL_TX_DMA_EN,
- I2S_CTRL_TX_EN | I2S_CTRL_TX_DMA_EN);
- else
- regmap_update_bits(i2s->regmap, LS_I2S_CTRL,
- I2S_CTRL_RX_EN | I2S_CTRL_RX_DMA_EN,
- I2S_CTRL_RX_EN | I2S_CTRL_RX_DMA_EN);
+ mask = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ LOONGSON_I2S_TX_ENABLE : LOONGSON_I2S_RX_ENABLE;
+ regmap_update_bits(i2s->regmap, LS_I2S_CTRL, mask, mask);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- regmap_update_bits(i2s->regmap, LS_I2S_CTRL,
- I2S_CTRL_TX_EN | I2S_CTRL_TX_DMA_EN, 0);
- else
- regmap_update_bits(i2s->regmap, LS_I2S_CTRL,
- I2S_CTRL_RX_EN | I2S_CTRL_RX_DMA_EN, 0);
+ mask = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ LOONGSON_I2S_TX_ENABLE : LOONGSON_I2S_RX_ENABLE;
+ regmap_update_bits(i2s->regmap, LS_I2S_CTRL, mask, 0);
break;
default:
ret = -EINVAL;
@@ -123,10 +123,40 @@ static int loongson_i2s_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
return 0;
}
+static int loongson_i2s_enable_mclk(struct loongson_i2s *i2s)
+{
+ u32 val;
+
+ if (i2s->rev_id == 0)
+ return 0;
+
+ regmap_update_bits(i2s->regmap, LS_I2S_CTRL,
+ I2S_CTRL_MCLK_EN, I2S_CTRL_MCLK_EN);
+
+ return regmap_read_poll_timeout_atomic(i2s->regmap,
+ LS_I2S_CTRL, val,
+ val & I2S_CTRL_MCLK_READY,
+ LOONGSON_I2S_DEF_DELAY,
+ LOONGSON_I2S_DEF_TIMEOUT);
+}
+
+static int loongson_i2s_enable_bclk(struct loongson_i2s *i2s)
+{
+ u32 val;
+
+ if (i2s->rev_id == 0)
+ return 0;
+
+ return regmap_read_poll_timeout_atomic(i2s->regmap,
+ LS_I2S_CTRL, val,
+ val & I2S_CTRL_CLK_READY,
+ LOONGSON_I2S_DEF_DELAY,
+ LOONGSON_I2S_DEF_TIMEOUT);
+}
+
static int loongson_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct loongson_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- u32 val;
int ret;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
@@ -148,54 +178,29 @@ static int loongson_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
/* Enable master mode */
regmap_update_bits(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_MASTER,
I2S_CTRL_MASTER);
- if (i2s->rev_id == 1) {
- ret = regmap_read_poll_timeout_atomic(i2s->regmap,
- LS_I2S_CTRL, val,
- val & I2S_CTRL_CLK_READY,
- 10, 500000);
- if (ret < 0)
- dev_warn(dai->dev, "wait BCLK ready timeout\n");
- }
+ ret = loongson_i2s_enable_bclk(i2s);
+ if (ret < 0)
+ dev_warn(dai->dev, "wait BCLK ready timeout\n");
break;
case SND_SOC_DAIFMT_BC_FP:
/* Enable MCLK */
- if (i2s->rev_id == 1) {
- regmap_update_bits(i2s->regmap, LS_I2S_CTRL,
- I2S_CTRL_MCLK_EN,
- I2S_CTRL_MCLK_EN);
- ret = regmap_read_poll_timeout_atomic(i2s->regmap,
- LS_I2S_CTRL, val,
- val & I2S_CTRL_MCLK_READY,
- 10, 500000);
- if (ret < 0)
- dev_warn(dai->dev, "wait MCLK ready timeout\n");
- }
+ ret = loongson_i2s_enable_mclk(i2s);
+ if (ret < 0)
+ dev_warn(dai->dev, "wait MCLK ready timeout\n");
break;
case SND_SOC_DAIFMT_BP_FP:
/* Enable MCLK */
- if (i2s->rev_id == 1) {
- regmap_update_bits(i2s->regmap, LS_I2S_CTRL,
- I2S_CTRL_MCLK_EN,
- I2S_CTRL_MCLK_EN);
- ret = regmap_read_poll_timeout_atomic(i2s->regmap,
- LS_I2S_CTRL, val,
- val & I2S_CTRL_MCLK_READY,
- 10, 500000);
- if (ret < 0)
- dev_warn(dai->dev, "wait MCLK ready timeout\n");
- }
+ ret = loongson_i2s_enable_mclk(i2s);
+ if (ret < 0)
+ dev_warn(dai->dev, "wait MCLK ready timeout\n");
/* Enable master mode */
regmap_update_bits(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_MASTER,
I2S_CTRL_MASTER);
- if (i2s->rev_id == 1) {
- ret = regmap_read_poll_timeout_atomic(i2s->regmap,
- LS_I2S_CTRL, val,
- val & I2S_CTRL_CLK_READY,
- 10, 500000);
- if (ret < 0)
- dev_warn(dai->dev, "wait BCLK ready timeout\n");
- }
+
+ ret = loongson_i2s_enable_bclk(i2s);
+ if (ret < 0)
+ dev_warn(dai->dev, "wait BCLK ready timeout\n");
break;
default:
return -EINVAL;
@@ -242,6 +247,7 @@ struct snd_soc_dai_driver loongson_i2s_dai = {
.ops = &loongson_i2s_dai_ops,
.symmetric_rate = 1,
};
+EXPORT_SYMBOL_GPL(loongson_i2s_dai);
static int i2s_suspend(struct device *dev)
{
@@ -255,15 +261,16 @@ static int i2s_suspend(struct device *dev)
static int i2s_resume(struct device *dev)
{
struct loongson_i2s *i2s = dev_get_drvdata(dev);
- int ret;
regcache_cache_only(i2s->regmap, false);
regcache_mark_dirty(i2s->regmap);
- ret = regcache_sync(i2s->regmap);
-
- return ret;
+ return regcache_sync(i2s->regmap);
}
const struct dev_pm_ops loongson_i2s_pm = {
SYSTEM_SLEEP_PM_OPS(i2s_suspend, i2s_resume)
};
+EXPORT_SYMBOL_GPL(loongson_i2s_pm);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Common functions for loongson I2S controller driver");
generated by cgit (git 2.34.1) at 2025-07-30 17:42:14 +0000