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ASoC: Factor out cache I/O from WM8974
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Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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Mark Brown committed Aug 15, 2009
1 parent 37cfa19 commit 1e97f50
Showing 1 changed file with 55 additions and 94 deletions.
149 changes: 55 additions & 94 deletions sound/soc/codecs/wm8974.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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" };
Expand Down Expand Up @@ -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;
}
Expand All @@ -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;
Expand All @@ -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) {
Expand Down Expand Up @@ -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;
}

Expand All @@ -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)) {
Expand Down Expand Up @@ -549,53 +501,53 @@ 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;
}

/* liam need to make this lower power with dapm */
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:
power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;

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;
}

Expand Down Expand Up @@ -738,21 +690,25 @@ 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;
codec->num_dai = 1;
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;
Expand All @@ -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)
Expand Down

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