ASoC: wm9713: convert to regmap

Convert the Wolfson WM9713 to regmap API. This will leverage all the
regmap functions (debug, registers update, etc ...).

As a bonus, this will pave the path to gpio chip introduction, and
devicetree support. This was tested on the mioa701 board, pxa27x based,
in PCM playback, and through suspend/resume.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Reviewed-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -891,6 +891,7 @@ config SND_SOC_WM9712
 
 config SND_SOC_WM9713
 	tristate
+	select REGMAP_AC97
 
 # Amp
 config SND_SOC_LM4857

sound/soc/codecs/wm9713.c

@@ -19,6 +19,7 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/device.h>
+#include <linux/regmap.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/ac97_codec.h>
@@ -39,33 +40,15 @@ struct wm9713_priv {
 	struct mutex lock;
 };
 
-static unsigned int ac97_read(struct snd_soc_codec *codec,
-	unsigned int reg);
-static int ac97_write(struct snd_soc_codec *codec,
-	unsigned int reg, unsigned int val);
-
-/*
- * WM9713 register cache
- * Reg 0x3c bit 15 is used by touch driver.
- */
-static const u16 wm9713_reg[] = {
-	0x6174, 0x8080, 0x8080, 0x8080,
-	0xc880, 0xe808, 0xe808, 0x0808,
-	0x00da, 0x8000, 0xd600, 0xaaa0,
-	0xaaa0, 0xaaa0, 0x0000, 0x0000,
-	0x0f0f, 0x0040, 0x0000, 0x7f00,
-	0x0405, 0x0410, 0xbb80, 0xbb80,
-	0x0000, 0xbb80, 0x0000, 0x4523,
-	0x0000, 0x2000, 0x7eff, 0xffff,
-	0x0000, 0x0000, 0x0080, 0x0000,
-	0x0000, 0x0000, 0xfffe, 0xffff,
-	0x0000, 0x0000, 0x0000, 0xfffe,
-	0x4000, 0x0000, 0x0000, 0x0000,
-	0xb032, 0x3e00, 0x0000, 0x0000,
-	0x0000, 0x0000, 0x0000, 0x0000,
-	0x0000, 0x0000, 0x0000, 0x0006,
-	0x0001, 0x0000, 0x574d, 0x4c13,
-};
+static unsigned int ac97_read(struct snd_soc_codec *codec, unsigned int reg)
+{
+	return snd_soc_read(codec, reg);
+}
+static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
+		      unsigned int val)
+{
+	return snd_soc_write(codec, reg, val);
+}
 
 #define HPL_MIXER 0
 #define HPR_MIXER 1
@@ -674,39 +657,97 @@ static const struct snd_soc_dapm_route wm9713_audio_map[] = {
 	{"Capture Mono Mux", "Right", "Right Capture Source"},
 };
 
-static unsigned int ac97_read(struct snd_soc_codec *codec,
-	unsigned int reg)
+static bool wm9713_readable_reg(struct device *dev, unsigned int reg)
 {
-	struct wm9713_priv *wm9713 = snd_soc_codec_get_drvdata(codec);
-	u16 *cache = codec->reg_cache;
-
-	if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
-		reg == AC97_VENDOR_ID1 || reg == AC97_VENDOR_ID2 ||
-		reg == AC97_CD)
-		return soc_ac97_ops->read(wm9713->ac97, reg);
-	else {
-		reg = reg >> 1;
-
-		if (reg >= (ARRAY_SIZE(wm9713_reg)))
-			return -EIO;
-
-		return cache[reg];
+	switch (reg) {
+	case AC97_RESET ... AC97_PCM_SURR_DAC_RATE:
+	case AC97_PCM_LR_ADC_RATE:
+	case AC97_CENTER_LFE_MASTER:
+	case AC97_SPDIF ... AC97_LINE1_LEVEL:
+	case AC97_GPIO_CFG ... 0x5c:
+	case AC97_CODEC_CLASS_REV ... AC97_PCI_SID:
+	case 0x74 ... AC97_VENDOR_ID2:
+		return true;
+	default:
+		return false;
 	}
 }
 
-static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
-	unsigned int val)
+static bool wm9713_writeable_reg(struct device *dev, unsigned int reg)
 {
-	struct wm9713_priv *wm9713 = snd_soc_codec_get_drvdata(codec);
+	switch (reg) {
+	case AC97_VENDOR_ID1:
+	case AC97_VENDOR_ID2:
+		return false;
+	default:
+		return wm9713_readable_reg(dev, reg);
+	}
+}
 
-	u16 *cache = codec->reg_cache;
-	soc_ac97_ops->write(wm9713->ac97, reg, val);
-	reg = reg >> 1;
-	if (reg < (ARRAY_SIZE(wm9713_reg)))
-		cache[reg] = val;
+static const struct reg_default wm9713_reg_defaults[] = {
+	{ 0x02, 0x8080 },	/* Speaker Output Volume */
+	{ 0x04, 0x8080 },	/* Headphone Output Volume */
+	{ 0x06, 0x8080 },	/* Out3/OUT4 Volume */
+	{ 0x08, 0xc880 },	/* Mono Volume */
+	{ 0x0a, 0xe808 },	/* LINEIN Volume */
+	{ 0x0c, 0xe808 },	/* DAC PGA Volume */
+	{ 0x0e, 0x0808 },	/* MIC PGA Volume */
+	{ 0x10, 0x00da },	/* MIC Routing Control */
+	{ 0x12, 0x8000 },	/* Record PGA Volume */
+	{ 0x14, 0xd600 },	/* Record Routing */
+	{ 0x16, 0xaaa0 },	/* PCBEEP Volume */
+	{ 0x18, 0xaaa0 },	/* VxDAC Volume */
+	{ 0x1a, 0xaaa0 },	/* AUXDAC Volume */
+	{ 0x1c, 0x0000 },	/* Output PGA Mux */
+	{ 0x1e, 0x0000 },	/* DAC 3D control */
+	{ 0x20, 0x0f0f },	/* DAC Tone Control*/
+	{ 0x22, 0x0040 },	/* MIC Input Select & Bias */
+	{ 0x24, 0x0000 },	/* Output Volume Mapping & Jack */
+	{ 0x26, 0x7f00 },	/* Powerdown Ctrl/Stat*/
+	{ 0x28, 0x0405 },	/* Extended Audio ID */
+	{ 0x2a, 0x0410 },	/* Extended Audio Start/Ctrl */
+	{ 0x2c, 0xbb80 },	/* Audio DACs Sample Rate */
+	{ 0x2e, 0xbb80 },	/* AUXDAC Sample Rate */
+	{ 0x32, 0xbb80 },	/* Audio ADCs Sample Rate */
+	{ 0x36, 0x4523 },	/* PCM codec control */
+	{ 0x3a, 0x2000 },	/* SPDIF control */
+	{ 0x3c, 0xfdff },	/* Powerdown 1 */
+	{ 0x3e, 0xffff },	/* Powerdown 2 */
+	{ 0x40, 0x0000 },	/* General Purpose */
+	{ 0x42, 0x0000 },	/* Fast Power-Up Control */
+	{ 0x44, 0x0080 },	/* MCLK/PLL Control */
+	{ 0x46, 0x0000 },	/* MCLK/PLL Control */
+	{ 0x4c, 0xfffe },	/* GPIO Pin Configuration */
+	{ 0x4e, 0xffff },	/* GPIO Pin Polarity / Type */
+	{ 0x50, 0x0000 },	/* GPIO Pin Sticky */
+	{ 0x52, 0x0000 },	/* GPIO Pin Wake-Up */
+				/* GPIO Pin Status */
+	{ 0x56, 0xfffe },	/* GPIO Pin Sharing */
+	{ 0x58, 0x4000 },	/* GPIO PullUp/PullDown */
+	{ 0x5a, 0x0000 },	/* Additional Functions 1 */
+	{ 0x5c, 0x0000 },	/* Additional Functions 2 */
+	{ 0x60, 0xb032 },	/* ALC Control */
+	{ 0x62, 0x3e00 },	/* ALC / Noise Gate Control */
+	{ 0x64, 0x0000 },	/* AUXDAC input control */
+	{ 0x74, 0x0000 },	/* Digitiser Reg 1 */
+	{ 0x76, 0x0006 },	/* Digitiser Reg 2 */
+	{ 0x78, 0x0001 },	/* Digitiser Reg 3 */
+	{ 0x7a, 0x0000 },	/* Digitiser Read Back */
+};
 
-	return 0;
-}
+static const struct regmap_config wm9713_regmap_config = {
+	.reg_bits = 16,
+	.reg_stride = 2,
+	.val_bits = 16,
+	.max_register = 0x7e,
+	.cache_type = REGCACHE_RBTREE,
+
+	.reg_defaults = wm9713_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(wm9713_reg_defaults),
+	.volatile_reg = regmap_ac97_default_volatile,
+	.readable_reg = wm9713_readable_reg,
+	.writeable_reg = wm9713_writeable_reg,
+};
 
 /* PLL divisors */
 struct _pll_div {
@@ -1173,8 +1214,7 @@ static int wm9713_soc_suspend(struct snd_soc_codec *codec)
 static int wm9713_soc_resume(struct snd_soc_codec *codec)
 {
 	struct wm9713_priv *wm9713 = snd_soc_codec_get_drvdata(codec);
-	int i, ret;
-	u16 *cache = codec->reg_cache;
+	int ret;
 
 	ret = snd_ac97_reset(wm9713->ac97, true, WM9713_VENDOR_ID,
 		WM9713_VENDOR_ID_MASK);
@@ -1189,12 +1229,8 @@ static int wm9713_soc_resume(struct snd_soc_codec *codec)
 
 	/* only synchronise the codec if warm reset failed */
 	if (ret == 0) {
-		for (i = 2; i < ARRAY_SIZE(wm9713_reg) << 1; i += 2) {
-			if (i == AC97_POWERDOWN || i == AC97_EXTENDED_MID ||
-				i == AC97_EXTENDED_MSTATUS || i > 0x66)
-				continue;
-			soc_ac97_ops->write(wm9713->ac97, i, cache[i>>1]);
-		}
+		regcache_mark_dirty(codec->component.regmap);
+		snd_soc_cache_sync(codec);
 	}
 
 	return ret;
@@ -1203,6 +1239,7 @@ static int wm9713_soc_resume(struct snd_soc_codec *codec)
 static int wm9713_soc_probe(struct snd_soc_codec *codec)
 {
 	struct wm9713_priv *wm9713 = snd_soc_codec_get_drvdata(codec);
+	struct regmap *regmap;
 	int reg;
 
 	wm9713->ac97 = snd_soc_new_ac97_codec(codec, WM9713_VENDOR_ID,
@@ -1210,6 +1247,14 @@ static int wm9713_soc_probe(struct snd_soc_codec *codec)
 	if (IS_ERR(wm9713->ac97))
 		return PTR_ERR(wm9713->ac97);
 
+	regmap = devm_regmap_init_ac97(wm9713->ac97, &wm9713_regmap_config);
+	if (IS_ERR(regmap)) {
+		snd_soc_free_ac97_codec(wm9713->ac97);
+		return PTR_ERR(regmap);
+	}
+
+	snd_soc_codec_init_regmap(codec, regmap);
+
 	/* unmute the adc - move to kcontrol */
 	reg = ac97_read(codec, AC97_CD) & 0x7fff;
 	ac97_write(codec, AC97_CD, reg);
@@ -1221,6 +1266,7 @@ static int wm9713_soc_remove(struct snd_soc_codec *codec)
 {
 	struct wm9713_priv *wm9713 = snd_soc_codec_get_drvdata(codec);
 
+	snd_soc_codec_exit_regmap(codec);
 	snd_soc_free_ac97_codec(wm9713->ac97);
 	return 0;
 }
@@ -1230,13 +1276,7 @@ static struct snd_soc_codec_driver soc_codec_dev_wm9713 = {
 	.remove = 	wm9713_soc_remove,
 	.suspend =	wm9713_soc_suspend,
 	.resume = 	wm9713_soc_resume,
-	.read = ac97_read,
-	.write = ac97_write,
 	.set_bias_level = wm9713_set_bias_level,
-	.reg_cache_size = ARRAY_SIZE(wm9713_reg),
-	.reg_word_size = sizeof(u16),
-	.reg_cache_step = 2,
-	.reg_cache_default = wm9713_reg,
 
 	.controls = wm9713_snd_ac97_controls,
 	.num_controls = ARRAY_SIZE(wm9713_snd_ac97_controls),