[alsa-devel] [PATCH 3/3] ASoC: jz4740-codec: Use regmap
Lars-Peter Clausen
lars at metafoo.de
Sat Oct 27 17:15:08 CEST 2012
Use regmap-mmio instead of open-coding caching and register accessors.
Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
---
sound/soc/codecs/Kconfig | 1 +
sound/soc/codecs/jz4740.c | 86 +++++++++++++++++++++-----------------------
2 files changed, 42 insertions(+), 45 deletions(-)
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index ac59fe1..2643593 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -237,6 +237,7 @@ config SND_SOC_CX20442
tristate
config SND_SOC_JZ4740_CODEC
+ select REGMAP_MMIO
tristate
config SND_SOC_L3
diff --git a/sound/soc/codecs/jz4740.c b/sound/soc/codecs/jz4740.c
index 1661202..9ad1da3 100644
--- a/sound/soc/codecs/jz4740.c
+++ b/sound/soc/codecs/jz4740.c
@@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/io.h>
+#include <linux/regmap.h>
#include <linux/delay.h>
@@ -27,7 +28,7 @@
#include <sound/tlv.h>
#define JZ4740_REG_CODEC_1 0x0
-#define JZ4740_REG_CODEC_2 0x1
+#define JZ4740_REG_CODEC_2 0x4
#define JZ4740_CODEC_1_LINE_ENABLE BIT(29)
#define JZ4740_CODEC_1_MIC_ENABLE BIT(28)
@@ -68,33 +69,15 @@
#define JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET 4
#define JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET 0
-static const uint32_t jz4740_codec_regs[] = {
- 0x021b2302, 0x00170803,
+static const struct reg_default jz4740_codec_reg_defaults[] = {
+ { JZ4740_REG_CODEC_1, 0x021b2302 },
+ { JZ4740_REG_CODEC_2, 0x00170803 },
};
struct jz4740_codec {
- void __iomem *base;
+ struct regmap *regmap;
};
-static unsigned int jz4740_codec_read(struct snd_soc_codec *codec,
- unsigned int reg)
-{
- struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
- return readl(jz4740_codec->base + (reg << 2));
-}
-
-static int jz4740_codec_write(struct snd_soc_codec *codec, unsigned int reg,
- unsigned int val)
-{
- struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
- u32 *cache = codec->reg_cache;
-
- cache[reg] = val;
- writel(val, jz4740_codec->base + (reg << 2));
-
- return 0;
-}
-
static const unsigned int jz4740_mic_tlv[] = {
TLV_DB_RANGE_HEAD(2),
0, 2, TLV_DB_SCALE_ITEM(0, 600, 0),
@@ -175,8 +158,8 @@ static const struct snd_soc_dapm_route jz4740_codec_dapm_routes[] = {
static int jz4740_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
+ struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(dai->codec);
uint32_t val;
- struct snd_soc_codec *codec = dai->codec;
switch (params_rate(params)) {
case 8000:
@@ -212,7 +195,7 @@ static int jz4740_codec_hw_params(struct snd_pcm_substream *substream,
val <<= JZ4740_CODEC_2_SAMPLE_RATE_OFFSET;
- snd_soc_update_bits(codec, JZ4740_REG_CODEC_2,
+ regmap_update_bits(jz4740_codec->regmap, JZ4740_REG_CODEC_2,
JZ4740_CODEC_2_SAMPLE_RATE_MASK, val);
return 0;
@@ -242,25 +225,23 @@ static struct snd_soc_dai_driver jz4740_codec_dai = {
.symmetric_rates = 1,
};
-static void jz4740_codec_wakeup(struct snd_soc_codec *codec)
+static void jz4740_codec_wakeup(struct regmap *regmap)
{
- int i;
- uint32_t *cache = codec->reg_cache;
-
- snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
+ regmap_update_bits(regmap, JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_RESET, JZ4740_CODEC_1_RESET);
udelay(2);
- snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
+ regmap_update_bits(regmap, JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_SUSPEND | JZ4740_CODEC_1_RESET, 0);
- for (i = 0; i < ARRAY_SIZE(jz4740_codec_regs); ++i)
- jz4740_codec_write(codec, i, cache[i]);
+ regcache_sync(regmap);
}
static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
+ struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
+ struct regmap *regmap = jz4740_codec->regmap;
unsigned int mask;
unsigned int value;
@@ -273,12 +254,12 @@ static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
value = 0;
- snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
+ regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
break;
case SND_SOC_BIAS_STANDBY:
/* The only way to clear the suspend flag is to reset the codec */
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
- jz4740_codec_wakeup(codec);
+ jz4740_codec_wakeup(regmap);
mask = JZ4740_CODEC_1_VREF_DISABLE |
JZ4740_CODEC_1_VREF_AMP_DISABLE |
@@ -287,13 +268,14 @@ static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
JZ4740_CODEC_1_VREF_AMP_DISABLE |
JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
- snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
+ regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
break;
case SND_SOC_BIAS_OFF:
mask = JZ4740_CODEC_1_SUSPEND;
value = JZ4740_CODEC_1_SUSPEND;
- snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
+ regmap_update_bits(regmap, JZ4740_REG_CODEC_1, mask, value);
+ regcache_mark_dirty(regmap);
break;
default:
break;
@@ -306,7 +288,9 @@ static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
static int jz4740_codec_dev_probe(struct snd_soc_codec *codec)
{
- snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
+ struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
+
+ regmap_update_bits(jz4740_codec->regmap, JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_SW2_ENABLE, JZ4740_CODEC_1_SW2_ENABLE);
jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
@@ -343,12 +327,7 @@ static struct snd_soc_codec_driver soc_codec_dev_jz4740_codec = {
.remove = jz4740_codec_dev_remove,
.suspend = jz4740_codec_suspend,
.resume = jz4740_codec_resume,
- .read = jz4740_codec_read,
- .write = jz4740_codec_write,
.set_bias_level = jz4740_codec_set_bias_level,
- .reg_cache_default = jz4740_codec_regs,
- .reg_word_size = sizeof(u32),
- .reg_cache_size = 2,
.controls = jz4740_codec_controls,
.num_controls = ARRAY_SIZE(jz4740_codec_controls),
@@ -358,11 +337,23 @@ static struct snd_soc_codec_driver soc_codec_dev_jz4740_codec = {
.num_dapm_routes = ARRAY_SIZE(jz4740_codec_dapm_routes),
};
+static const struct regmap_config jz4740_codec_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = JZ4740_REG_CODEC_2,
+
+ .reg_defaults = jz4740_codec_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(jz4740_codec_reg_defaults),
+ .cache_type = REGCACHE_RBTREE,
+};
+
static int __devinit jz4740_codec_probe(struct platform_device *pdev)
{
int ret;
struct jz4740_codec *jz4740_codec;
struct resource *mem;
+ void __iomem *base;
jz4740_codec = devm_kzalloc(&pdev->dev, sizeof(*jz4740_codec),
GFP_KERNEL);
@@ -370,10 +361,15 @@ static int __devinit jz4740_codec_probe(struct platform_device *pdev)
return -ENOMEM;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- jz4740_codec->base = devm_request_and_ioremap(&pdev->dev, mem);
- if (!jz4740_codec->base)
+ base = devm_request_and_ioremap(&pdev->dev, mem);
+ if (!base)
return -EBUSY;
+ jz4740_codec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &jz4740_codec_regmap_config);
+ if (IS_ERR(jz4740_codec->regmap))
+ return PTR_ERR(jz4740_codec->regmap);
+
platform_set_drvdata(pdev, jz4740_codec);
ret = snd_soc_register_codec(&pdev->dev,
--
1.7.2.5
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