[alsa-devel] [PATCH 1/4] ASoC: clean up cache read/write functions

[Takashi Iwai]

Use common helper functions for standard read/write functions of each
data type.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 sound/soc/soc-cache.c |  251 ++++++++++---------------------------------------
 1 files changed, 49 insertions(+), 202 deletions(-)

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 0e17b40..374b06a 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -18,19 +18,44 @@
 #include <linux/bitmap.h>
 #include <linux/rbtree.h>
 
-static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec,
-				     unsigned int reg)
+static int do_hw_write(struct snd_soc_codec *codec, unsigned int reg,
+		       unsigned int value, void *data, unsigned int size)
+{
+	int ret;
+
+	if (!snd_soc_codec_volatile_register(codec, reg) &&
+	    reg < codec->driver->reg_cache_size) {
+		ret = snd_soc_cache_write(codec, reg, value);
+		if (ret < 0)
+			return -1;
+	}
+
+	if (codec->cache_only) {
+		codec->cache_sync = 1;
+		return 0;
+	}
+
+	ret = codec->hw_write(codec->control_data, data, size);
+	if (ret == size)
+		return 0;
+	if (ret < 0)
+		return ret;
+	else
+		return -EIO;
+}
+
+static unsigned int do_hw_read(struct snd_soc_codec *codec, unsigned int reg)
 {
 	int ret;
 	unsigned int val;
 
 	if (reg >= codec->driver->reg_cache_size ||
-		snd_soc_codec_volatile_register(codec, reg)) {
-			if (codec->cache_only)
-				return -1;
+	    snd_soc_codec_volatile_register(codec, reg)) {
+		if (codec->cache_only)
+			return -1;
 
-			BUG_ON(!codec->hw_read);
-			return codec->hw_read(codec, reg);
+		BUG_ON(!codec->hw_read);
+		return codec->hw_read(codec, reg);
 	}
 
 	ret = snd_soc_cache_read(codec, reg, &val);
@@ -39,34 +64,21 @@ static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec,
 	return val;
 }
 
+static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec,
+				      unsigned int reg)
+{
+	return do_hw_read(codec, reg);
+}
+
 static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg,
 			     unsigned int value)
 {
 	u8 data[2];
-	int ret;
 
 	data[0] = (reg << 4) | ((value >> 8) & 0x000f);
 	data[1] = value & 0x00ff;
 
-	if (!snd_soc_codec_volatile_register(codec, reg) &&
-		reg < codec->driver->reg_cache_size) {
-		ret = snd_soc_cache_write(codec, reg, value);
-		if (ret < 0)
-			return -1;
-	}
-
-	if (codec->cache_only) {
-		codec->cache_sync = 1;
-		return 0;
-	}
-
-	ret = codec->hw_write(codec->control_data, data, 2);
-	if (ret == 2)
-		return 0;
-	if (ret < 0)
-		return ret;
-	else
-		return -EIO;
+	return do_hw_write(codec, reg, value, data, 2);
 }
 
 #if defined(CONFIG_SPI_MASTER)
@@ -102,52 +114,18 @@ static int snd_soc_4_12_spi_write(void *control_data, const char *data,
 static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec,
 				     unsigned int reg)
 {
-	int ret;
-	unsigned int val;
-
-	if (reg >= codec->driver->reg_cache_size ||
-		snd_soc_codec_volatile_register(codec, reg)) {
-			if (codec->cache_only)
-				return -1;
-
-			BUG_ON(!codec->hw_read);
-			return codec->hw_read(codec, reg);
-	}
-
-	ret = snd_soc_cache_read(codec, reg, &val);
-	if (ret < 0)
-		return -1;
-	return val;
+	return do_hw_read(codec, reg);
 }
 
 static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg,
 			     unsigned int value)
 {
 	u8 data[2];
-	int ret;
 
 	data[0] = (reg << 1) | ((value >> 8) & 0x0001);
 	data[1] = value & 0x00ff;
 
-	if (!snd_soc_codec_volatile_register(codec, reg) &&
-		reg < codec->driver->reg_cache_size) {
-		ret = snd_soc_cache_write(codec, reg, value);
-		if (ret < 0)
-			return -1;
-	}
-
-	if (codec->cache_only) {
-		codec->cache_sync = 1;
-		return 0;
-	}
-
-	ret = codec->hw_write(codec->control_data, data, 2);
-	if (ret == 2)
-		return 0;
-	if (ret < 0)
-		return ret;
-	else
-		return -EIO;
+	return do_hw_write(codec, reg, value, data, 2);
 }
 
 #if defined(CONFIG_SPI_MASTER)
@@ -184,50 +162,19 @@ static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg,
 			     unsigned int value)
 {
 	u8 data[2];
-	int ret;
 
 	reg &= 0xff;
 	data[0] = reg;
 	data[1] = value & 0xff;
 
-	if (!snd_soc_codec_volatile_register(codec, reg) &&
-		reg < codec->driver->reg_cache_size) {
-		ret = snd_soc_cache_write(codec, reg, value);
-		if (ret < 0)
-			return -1;
-	}
-
-	if (codec->cache_only) {
-		codec->cache_sync = 1;
-		return 0;
-	}
-
-	if (codec->hw_write(codec->control_data, data, 2) == 2)
-		return 0;
-	else
-		return -EIO;
+	return do_hw_write(codec, reg, value, data, 2);
 }
 
 static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec,
 				     unsigned int reg)
 {
-	int ret;
-	unsigned int val;
-
 	reg &= 0xff;
-	if (reg >= codec->driver->reg_cache_size ||
-		snd_soc_codec_volatile_register(codec, reg)) {
-			if (codec->cache_only)
-				return -1;
-
-			BUG_ON(!codec->hw_read);
-			return codec->hw_read(codec, reg);
-	}
-
-	ret = snd_soc_cache_read(codec, reg, &val);
-	if (ret < 0)
-		return -1;
-	return val;
+	return do_hw_read(codec, reg);
 }
 
 #if defined(CONFIG_SPI_MASTER)
@@ -264,49 +211,18 @@ static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg,
 			      unsigned int value)
 {
 	u8 data[3];
-	int ret;
 
 	data[0] = reg;
 	data[1] = (value >> 8) & 0xff;
 	data[2] = value & 0xff;
 
-	if (!snd_soc_codec_volatile_register(codec, reg) &&
-		reg < codec->driver->reg_cache_size) {
-		ret = snd_soc_cache_write(codec, reg, value);
-		if (ret < 0)
-			return -1;
-	}
-
-	if (codec->cache_only) {
-		codec->cache_sync = 1;
-		return 0;
-	}
-
-	if (codec->hw_write(codec->control_data, data, 3) == 3)
-		return 0;
-	else
-		return -EIO;
+	return do_hw_write(codec, reg, value, data, 3);
 }
 
 static unsigned int snd_soc_8_16_read(struct snd_soc_codec *codec,
 				      unsigned int reg)
 {
-	int ret;
-	unsigned int val;
-
-	if (reg >= codec->driver->reg_cache_size ||
-	    snd_soc_codec_volatile_register(codec, reg)) {
-		if (codec->cache_only)
-			return -1;
-
-		BUG_ON(!codec->hw_read);
-		return codec->hw_read(codec, reg);
-	}
-
-	ret = snd_soc_cache_read(codec, reg, &val);
-	if (ret < 0)
-		return -1;
-	return val;
+	return do_hw_read(codec, reg);
 }
 
 #if defined(CONFIG_SPI_MASTER)
@@ -445,55 +361,21 @@ static unsigned int snd_soc_16_8_read_i2c(struct snd_soc_codec *codec,
 static unsigned int snd_soc_16_8_read(struct snd_soc_codec *codec,
 				     unsigned int reg)
 {
-	int ret;
-	unsigned int val;
-
 	reg &= 0xff;
-	if (reg >= codec->driver->reg_cache_size ||
-		snd_soc_codec_volatile_register(codec, reg)) {
-			if (codec->cache_only)
-				return -1;
-
-			BUG_ON(!codec->hw_read);
-			return codec->hw_read(codec, reg);
-	}
-
-	ret = snd_soc_cache_read(codec, reg, &val);
-	if (ret < 0)
-		return -1;
-	return val;
+	return do_hw_read(codec, reg);
 }
 
 static int snd_soc_16_8_write(struct snd_soc_codec *codec, unsigned int reg,
 			     unsigned int value)
 {
 	u8 data[3];
-	int ret;
 
 	data[0] = (reg >> 8) & 0xff;
 	data[1] = reg & 0xff;
 	data[2] = value;
 
 	reg &= 0xff;
-	if (!snd_soc_codec_volatile_register(codec, reg) &&
-		reg < codec->driver->reg_cache_size) {
-		ret = snd_soc_cache_write(codec, reg, value);
-		if (ret < 0)
-			return -1;
-	}
-
-	if (codec->cache_only) {
-		codec->cache_sync = 1;
-		return 0;
-	}
-
-	ret = codec->hw_write(codec->control_data, data, 3);
-	if (ret == 3)
-		return 0;
-	if (ret < 0)
-		return ret;
-	else
-		return -EIO;
+	return do_hw_write(codec, reg, value, data, 3);
 }
 
 #if defined(CONFIG_SPI_MASTER)
@@ -564,55 +446,20 @@ static unsigned int snd_soc_16_16_read_i2c(struct snd_soc_codec *codec,
 static unsigned int snd_soc_16_16_read(struct snd_soc_codec *codec,
 				       unsigned int reg)
 {
-	int ret;
-	unsigned int val;
-
-	if (reg >= codec->driver->reg_cache_size ||
-	    snd_soc_codec_volatile_register(codec, reg)) {
-		if (codec->cache_only)
-			return -1;
-
-		BUG_ON(!codec->hw_read);
-		return codec->hw_read(codec, reg);
-	}
-
-	ret = snd_soc_cache_read(codec, reg, &val);
-	if (ret < 0)
-		return -1;
-
-	return val;
+	return do_hw_read(codec, reg);
 }
 
 static int snd_soc_16_16_write(struct snd_soc_codec *codec, unsigned int reg,
 			       unsigned int value)
 {
 	u8 data[4];
-	int ret;
 
 	data[0] = (reg >> 8) & 0xff;
 	data[1] = reg & 0xff;
 	data[2] = (value >> 8) & 0xff;
 	data[3] = value & 0xff;
 
-	if (!snd_soc_codec_volatile_register(codec, reg) &&
-		reg < codec->driver->reg_cache_size) {
-		ret = snd_soc_cache_write(codec, reg, value);
-		if (ret < 0)
-			return -1;
-	}
-
-	if (codec->cache_only) {
-		codec->cache_sync = 1;
-		return 0;
-	}
-
-	ret = codec->hw_write(codec->control_data, data, 4);
-	if (ret == 4)
-		return 0;
-	if (ret < 0)
-		return ret;
-	else
-		return -EIO;
+	return do_hw_write(codec, reg, value, data, 4);
 }
 
 #if defined(CONFIG_SPI_MASTER)
-- 
1.7.3.4