ASoC: Factor out cache I/O from WM8974

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 55 insertions, 94 deletions

diff --git a/sound/soc/codecs/wm8974.c b/sound/soc/codecs/wm8974.c
index 5104c8aa34f6..d8a013ab3177 100644
--- a/sound/soc/codecs/wm8974.c
+++ b/sound/soc/codecs/wm8974.c
@@ -57,55 +57,7 @@ struct wm8974_priv {
 
 static struct snd_soc_codec *wm8974_codec;
 
-/*
- * read wm8974 register cache
- */
-static inline unsigned int wm8974_read_reg_cache(struct snd_soc_codec *codec,
-        unsigned int reg)
-{
-        u16 *cache = codec->reg_cache;
-        if (reg == WM8974_RESET)
-                return 0;
-        if (reg >= WM8974_CACHEREGNUM)
-                return -1;
-        return cache[reg];
-}
-
-/*
- * write wm8974 register cache
- */
-static inline void wm8974_write_reg_cache(struct snd_soc_codec *codec,
-        u16 reg, unsigned int value)
-{
-        u16 *cache = codec->reg_cache;
-        if (reg >= WM8974_CACHEREGNUM)
-                return;
-        cache[reg] = value;
-}
-
-/*
- * write to the WM8974 register space
- */
-static int wm8974_write(struct snd_soc_codec *codec, unsigned int reg,
-        unsigned int value)
-{
-        u8 data[2];
-
-        /* data is
-         *   D15..D9 WM8974 register offset
-         *   D8...D0 register data
-         */
-        data[0] = (reg << 1) | ((value >> 8) & 0x0001);
-        data[1] = value & 0x00ff;
-
-        wm8974_write_reg_cache(codec, reg, value);
-        if (codec->hw_write(codec->control_data, data, 2) == 2)
-                return 0;
-        else
-                return -EIO;
-}
-
-#define wm8974_reset(c) wm8974_write(c, WM8974_RESET, 0)
+#define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
 
 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
@@ -385,27 +337,27 @@ static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
 
         if (freq_in == 0 || freq_out == 0) {
                 /* Clock CODEC directly from MCLK */
-                reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
-                wm8974_write(codec, WM8974_CLOCK, reg & 0x0ff);
+                reg = snd_soc_read(codec, WM8974_CLOCK);
+                snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
 
                 /* Turn off PLL */
-                reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
-                wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
+                reg = snd_soc_read(codec, WM8974_POWER1);
+                snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
                 return 0;
         }
 
         pll_factors(freq_out*4, freq_in);
 
-        wm8974_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
-        wm8974_write(codec, WM8974_PLLK1, pll_div.k >> 18);
-        wm8974_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
-        wm8974_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
-        reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
-        wm8974_write(codec, WM8974_POWER1, reg | 0x020);
+        snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
+        snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
+        snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
+        snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
+        reg = snd_soc_read(codec, WM8974_POWER1);
+        snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
 
         /* Run CODEC from PLL instead of MCLK */
-        reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
-        wm8974_write(codec, WM8974_CLOCK, reg | 0x100);
+        reg = snd_soc_read(codec, WM8974_CLOCK);
+        snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
 
         return 0;
 }
@@ -421,24 +373,24 @@ static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
 
         switch (div_id) {
         case WM8974_OPCLKDIV:
-                reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
-                wm8974_write(codec, WM8974_GPIO, reg | div);
+                reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
+                snd_soc_write(codec, WM8974_GPIO, reg | div);
                 break;
         case WM8974_MCLKDIV:
-                reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
-                wm8974_write(codec, WM8974_CLOCK, reg | div);
+                reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
+                snd_soc_write(codec, WM8974_CLOCK, reg | div);
                 break;
         case WM8974_ADCCLK:
-                reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
-                wm8974_write(codec, WM8974_ADC, reg | div);
+                reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7;
+                snd_soc_write(codec, WM8974_ADC, reg | div);
                 break;
         case WM8974_DACCLK:
-                reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
-                wm8974_write(codec, WM8974_DAC, reg | div);
+                reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7;
+                snd_soc_write(codec, WM8974_DAC, reg | div);
                 break;
         case WM8974_BCLKDIV:
-                reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
-                wm8974_write(codec, WM8974_CLOCK, reg | div);
+                reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
+                snd_soc_write(codec, WM8974_CLOCK, reg | div);
                 break;
         default:
                 return -EINVAL;
@@ -452,7 +404,7 @@ static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
 {
         struct snd_soc_codec *codec = codec_dai->codec;
         u16 iface = 0;
-        u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
+        u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
 
         /* set master/slave audio interface */
         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
@@ -499,8 +451,8 @@ static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
                 return -EINVAL;
         }
 
-        wm8974_write(codec, WM8974_IFACE, iface);
-        wm8974_write(codec, WM8974_CLOCK, clk);
+        snd_soc_write(codec, WM8974_IFACE, iface);
+        snd_soc_write(codec, WM8974_CLOCK, clk);
         return 0;
 }
 
@@ -509,8 +461,8 @@ static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
                                 struct snd_soc_dai *dai)
 {
         struct snd_soc_codec *codec = dai->codec;
-        u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
-        u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
+        u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
+        u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
 
         /* bit size */
         switch (params_format(params)) {
@@ -549,20 +501,20 @@ static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
                 break;
         }
 
-        wm8974_write(codec, WM8974_IFACE, iface);
-        wm8974_write(codec, WM8974_ADD, adn);
+        snd_soc_write(codec, WM8974_IFACE, iface);
+        snd_soc_write(codec, WM8974_ADD, adn);
         return 0;
 }
 
 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 {
         struct snd_soc_codec *codec = dai->codec;
-        u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
+        u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
 
         if (mute)
-                wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
+                snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
         else
-                wm8974_write(codec, WM8974_DAC, mute_reg);
+                snd_soc_write(codec, WM8974_DAC, mute_reg);
         return 0;
 }
 
@@ -570,13 +522,13 @@ static int wm8974_mute(struct snd_soc_dai *dai, int mute)
 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
         enum snd_soc_bias_level level)
 {
-        u16 power1 = wm8974_read_reg_cache(codec, WM8974_POWER1) & ~0x3;
+        u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
 
         switch (level) {
         case SND_SOC_BIAS_ON:
         case SND_SOC_BIAS_PREPARE:
                 power1 |= 0x1;  /* VMID 50k */
-                wm8974_write(codec, WM8974_POWER1, power1);
+                snd_soc_write(codec, WM8974_POWER1, power1);
                 break;
 
         case SND_SOC_BIAS_STANDBY:
@@ -584,18 +536,18 @@ static int wm8974_set_bias_level(struct snd_soc_codec *codec,
 
                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
                         /* Initial cap charge at VMID 5k */
-                        wm8974_write(codec, WM8974_POWER1, power1 | 0x3);
+                        snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
                         mdelay(100);
                 }
 
                 power1 |= 0x2;  /* VMID 500k */
-                wm8974_write(codec, WM8974_POWER1, power1);
+                snd_soc_write(codec, WM8974_POWER1, power1);
                 break;
 
         case SND_SOC_BIAS_OFF:
-                wm8974_write(codec, WM8974_POWER1, 0);
-                wm8974_write(codec, WM8974_POWER2, 0);
-                wm8974_write(codec, WM8974_POWER3, 0);
+                snd_soc_write(codec, WM8974_POWER1, 0);
+                snd_soc_write(codec, WM8974_POWER2, 0);
+                snd_soc_write(codec, WM8974_POWER3, 0);
                 break;
         }
 
@@ -738,8 +690,6 @@ static __devinit int wm8974_register(struct wm8974_priv *wm8974)
         codec->private_data = wm8974;
         codec->name = "WM8974";
         codec->owner = THIS_MODULE;
-        codec->read = wm8974_read_reg_cache;
-        codec->write = wm8974_write;
         codec->bias_level = SND_SOC_BIAS_OFF;
         codec->set_bias_level = wm8974_set_bias_level;
         codec->dai = &wm8974_dai;
@@ -747,12 +697,18 @@ static __devinit int wm8974_register(struct wm8974_priv *wm8974)
         codec->reg_cache_size = WM8974_CACHEREGNUM;
         codec->reg_cache = &wm8974->reg_cache;
 
+        ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
+        if (ret < 0) {
+                dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+                goto err;
+        }
+
         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
 
         ret = wm8974_reset(codec);
         if (ret < 0) {
                 dev_err(codec->dev, "Failed to issue reset\n");
-                return ret;
+                goto err;
         }
 
         wm8974_dai.dev = codec->dev;
@@ -764,17 +720,22 @@ static __devinit int wm8974_register(struct wm8974_priv *wm8974)
         ret = snd_soc_register_codec(codec);
         if (ret != 0) {
                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
-                return ret;
+                goto err;
         }
 
         ret = snd_soc_register_dai(&wm8974_dai);
         if (ret != 0) {
                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-                snd_soc_unregister_codec(codec);
-                return ret;
+                goto err_codec;
         }
 
         return 0;
+
+err_codec:
+        snd_soc_unregister_codec(codec);
+err:
+        kfree(wm8974);
+        return ret;
 }
 
 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)