Hi Aidan,
Le sam. 22 oct. 2022 à 20:13:01 +0100, Aidan MacDonald aidanmacdonald.0x0@gmail.com a écrit :
Using regmap for accessing the AIC registers makes the driver a little easier to read, and later refactors can take advantage of regmap APIs to further simplify the driver.
Signed-off-by: Aidan MacDonald aidanmacdonald.0x0@gmail.com
Looks good.
Reviewed-by: Paul Cercueil paul@crapouillou.net
Cheers, -Paul
sound/soc/jz4740/Kconfig | 1 + sound/soc/jz4740/jz4740-i2s.c | 106 ++++++++++++---------------------- 2 files changed, 39 insertions(+), 68 deletions(-)
diff --git a/sound/soc/jz4740/Kconfig b/sound/soc/jz4740/Kconfig index e72f826062e9..dd3b4507fbe6 100644 --- a/sound/soc/jz4740/Kconfig +++ b/sound/soc/jz4740/Kconfig @@ -3,6 +3,7 @@ config SND_JZ4740_SOC_I2S tristate "SoC Audio (I2S protocol) for Ingenic JZ4740 SoC" depends on MIPS || COMPILE_TEST depends on HAS_IOMEM
- select REGMAP_MMIO select SND_SOC_GENERIC_DMAENGINE_PCM help Say Y if you want to use I2S protocol and I2S codec on Ingenic
JZ4740 diff --git a/sound/soc/jz4740/jz4740-i2s.c b/sound/soc/jz4740/jz4740-i2s.c index 83cb81999c6f..f3c0d7c0415e 100644 --- a/sound/soc/jz4740/jz4740-i2s.c +++ b/sound/soc/jz4740/jz4740-i2s.c @@ -9,6 +9,7 @@ #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/slab.h>
#include <linux/clk.h> @@ -96,7 +97,7 @@ struct i2s_soc_info { };
struct jz4740_i2s {
- void __iomem *base;
struct regmap *regmap;
struct clk *clk_aic; struct clk *clk_i2s;
@@ -107,31 +108,10 @@ struct jz4740_i2s { const struct i2s_soc_info *soc_info; };
-static inline uint32_t jz4740_i2s_read(const struct jz4740_i2s *i2s,
- unsigned int reg)
-{
- return readl(i2s->base + reg);
-}
-static inline void jz4740_i2s_write(const struct jz4740_i2s *i2s,
- unsigned int reg, uint32_t value)
-{
- writel(value, i2s->base + reg);
-}
-static inline void jz4740_i2s_set_bits(const struct jz4740_i2s *i2s,
- unsigned int reg, uint32_t bits)
-{
- uint32_t value = jz4740_i2s_read(i2s, reg);
- value |= bits;
- jz4740_i2s_write(i2s, reg, value);
-}
static int jz4740_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
uint32_t conf; int ret;
/*
@@ -141,9 +121,9 @@ static int jz4740_i2s_startup(struct snd_pcm_substream *substream, */ if (!i2s->soc_info->shared_fifo_flush) { if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
jz4740_i2s_set_bits(i2s, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_TFLUSH);
regmap_set_bits(i2s->regmap, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_TFLUSH);
jz4740_i2s_set_bits(i2s, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_RFLUSH);
regmap_set_bits(i2s->regmap, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_RFLUSH);}
if (snd_soc_dai_active(dai))
@@ -156,16 +136,13 @@ static int jz4740_i2s_startup(struct snd_pcm_substream *substream, * guard this behind the snd_soc_dai_active() check. */ if (i2s->soc_info->shared_fifo_flush)
jz4740_i2s_set_bits(i2s, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_TFLUSH);
regmap_set_bits(i2s->regmap, JZ_REG_AIC_CTRL, JZ_AIC_CTRL_TFLUSH);ret = clk_prepare_enable(i2s->clk_i2s); if (ret) return ret;
- conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
- conf |= JZ_AIC_CONF_ENABLE;
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
- regmap_set_bits(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_ENABLE); return 0;
}
@@ -173,14 +150,11 @@ static void jz4740_i2s_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
uint32_t conf;
if (snd_soc_dai_active(dai)) return;
conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
conf &= ~JZ_AIC_CONF_ENABLE;
jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
regmap_clear_bits(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_ENABLE);
clk_disable_unprepare(i2s->clk_i2s);
} @@ -189,8 +163,6 @@ static int jz4740_i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
uint32_t ctrl; uint32_t mask;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
@@ -198,38 +170,30 @@ static int jz4740_i2s_trigger(struct snd_pcm_substream *substream, int cmd, else mask = JZ_AIC_CTRL_ENABLE_CAPTURE | JZ_AIC_CTRL_ENABLE_RX_DMA;
- ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
- switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ctrl |= mask;
regmap_set_bits(i2s->regmap, JZ_REG_AIC_CTRL, mask);
ctrl &= ~mask;
regmap_clear_bits(i2s->regmap, JZ_REG_AIC_CTRL, mask);
- jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
- return 0;
}
static int jz4740_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- uint32_t format = 0;
- uint32_t conf;
- conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);
- conf &= ~(JZ_AIC_CONF_BIT_CLK_MASTER | JZ_AIC_CONF_SYNC_CLK_MASTER);
const unsigned int conf_mask = JZ_AIC_CONF_BIT_CLK_MASTER |
JZ_AIC_CONF_SYNC_CLK_MASTER;unsigned int conf = 0, format = 0;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { case SND_SOC_DAIFMT_BP_FP:
@@ -265,8 +229,8 @@ static int jz4740_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) return -EINVAL; }
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
- jz4740_i2s_write(i2s, JZ_REG_AIC_I2S_FMT, format);
regmap_update_bits(i2s->regmap, JZ_REG_AIC_CONF, conf_mask, conf);
regmap_write(i2s->regmap, JZ_REG_AIC_I2S_FMT, format);
return 0;
} @@ -279,9 +243,9 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream, uint32_t ctrl, div_reg; int div;
- ctrl = jz4740_i2s_read(i2s, JZ_REG_AIC_CTRL);
- regmap_read(i2s->regmap, JZ_REG_AIC_CTRL, &ctrl);
- regmap_read(i2s->regmap, JZ_REG_AIC_CLK_DIV, &div_reg);
div_reg = jz4740_i2s_read(i2s, JZ_REG_AIC_CLK_DIV); div = clk_get_rate(i2s->clk_i2s) / (64 * params_rate(params));
switch (params_format(params)) {
@@ -318,8 +282,8 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream, } }
- jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
- jz4740_i2s_write(i2s, JZ_REG_AIC_CLK_DIV, div_reg);
regmap_write(i2s->regmap, JZ_REG_AIC_CTRL, ctrl);
regmap_write(i2s->regmap, JZ_REG_AIC_CLK_DIV, div_reg);
return 0;
} @@ -356,13 +320,9 @@ static int jz4740_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id, static int jz4740_i2s_suspend(struct snd_soc_component *component) { struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component);
uint32_t conf;
if (snd_soc_component_active(component)) {
conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);conf &= ~JZ_AIC_CONF_ENABLE;jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
regmap_clear_bits(i2s->regmap, JZ_REG_AIC_CONF,JZ_AIC_CONF_ENABLE); clk_disable_unprepare(i2s->clk_i2s); }
@@ -374,7 +334,6 @@ static int jz4740_i2s_suspend(struct snd_soc_component *component) static int jz4740_i2s_resume(struct snd_soc_component *component) { struct jz4740_i2s *i2s = snd_soc_component_get_drvdata(component);
uint32_t conf; int ret;
ret = clk_prepare_enable(i2s->clk_aic);
@@ -388,9 +347,7 @@ static int jz4740_i2s_resume(struct snd_soc_component *component) return ret; }
conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF);conf |= JZ_AIC_CONF_ENABLE;jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
regmap_set_bits(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_ENABLE);}
return 0;
@@ -423,8 +380,8 @@ static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai) JZ_AIC_CONF_INTERNAL_CODEC; }
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET);
- jz4740_i2s_write(i2s, JZ_REG_AIC_CONF, conf);
regmap_write(i2s->regmap, JZ_REG_AIC_CONF, JZ_AIC_CONF_RESET);
regmap_write(i2s->regmap, JZ_REG_AIC_CONF, conf);
return 0;
} @@ -523,11 +480,19 @@ static const struct of_device_id jz4740_of_matches[] = { }; MODULE_DEVICE_TABLE(of, jz4740_of_matches);
+static const struct regmap_config jz4740_i2s_regmap_config = {
- .reg_bits = 32,
- .reg_stride = 4,
- .val_bits = 32,
- .max_register = JZ_REG_AIC_FIFO,
+};
static int jz4740_i2s_dev_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct jz4740_i2s *i2s; struct resource *mem;
void __iomem *regs; int ret;
i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
@@ -536,9 +501,9 @@ static int jz4740_i2s_dev_probe(struct platform_device *pdev)
i2s->soc_info = device_get_match_data(dev);
- i2s->base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
- if (IS_ERR(i2s->base))
return PTR_ERR(i2s->base);
regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
if (IS_ERR(regs))
return PTR_ERR(regs);i2s->playback_dma_data.maxburst = 16; i2s->playback_dma_data.addr = mem->start + JZ_REG_AIC_FIFO;
@@ -554,6 +519,11 @@ static int jz4740_i2s_dev_probe(struct platform_device *pdev) if (IS_ERR(i2s->clk_i2s)) return PTR_ERR(i2s->clk_i2s);
i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
&jz4740_i2s_regmap_config);if (IS_ERR(i2s->regmap))
return PTR_ERR(i2s->regmap);platform_set_drvdata(pdev, i2s);
ret = devm_snd_soc_register_component(dev, &jz4740_i2s_component,
-- 2.38.1