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Diffstat (limited to 'sound/soc/codecs/ad1938.c')
-rw-r--r--sound/soc/codecs/ad1938.c229
1 files changed, 41 insertions, 188 deletions
diff --git a/sound/soc/codecs/ad1938.c b/sound/soc/codecs/ad1938.c
index 5d48918..240cd15 100644
--- a/sound/soc/codecs/ad1938.c
+++ b/sound/soc/codecs/ad1938.c
@@ -27,6 +27,7 @@
*/
#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
@@ -46,6 +47,11 @@ struct ad1938_priv {
u8 reg_cache[AD1938_NUM_REGS];
};
+/* ad1938 register cache & default register settings */
+static const u8 ad1938_reg[AD1938_NUM_REGS] = {
+ 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
+};
+
static struct snd_soc_codec *ad1938_codec;
struct snd_soc_codec_device soc_codec_dev_ad1938;
static int ad1938_register(struct ad1938_priv *ad1938);
@@ -97,6 +103,7 @@ static const struct snd_kcontrol_new ad1938_snd_controls[] = {
static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "Playback", AD1938_DAC_CTRL0, 0, 1),
SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_SUPPLY("PLL_PWR", AD1938_PLL_CLK_CTRL0, 0, 1, NULL, 0),
SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1938_ADC_CTRL0, 0, 1, NULL, 0),
SND_SOC_DAPM_OUTPUT("DAC1OUT"),
SND_SOC_DAPM_OUTPUT("DAC2OUT"),
@@ -107,6 +114,8 @@ static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = {
};
static const struct snd_soc_dapm_route audio_paths[] = {
+ { "DAC", NULL, "PLL_PWR" },
+ { "ADC", NULL, "PLL_PWR" },
{ "DAC", NULL, "ADC_PWR" },
{ "ADC", NULL, "ADC_PWR" },
{ "DAC1OUT", "DAC1 Switch", "DAC" },
@@ -126,30 +135,20 @@ static int ad1938_mute(struct snd_soc_dai *dai, int mute)
struct snd_soc_codec *codec = dai->codec;
int reg;
- reg = codec->read(codec, AD1938_DAC_CTRL2);
+ reg = snd_soc_read(codec, AD1938_DAC_CTRL2);
reg = (mute > 0) ? reg | AD1938_DAC_MASTER_MUTE : reg &
(~AD1938_DAC_MASTER_MUTE);
- codec->write(codec, AD1938_DAC_CTRL2, reg);
-
- return 0;
-}
-
-static inline int ad1938_pll_powerctrl(struct snd_soc_codec *codec, int cmd)
-{
- int reg = codec->read(codec, AD1938_PLL_CLK_CTRL0);
- reg = (cmd > 0) ? reg & (~AD1938_PLL_POWERDOWN) : reg |
- AD1938_PLL_POWERDOWN;
- codec->write(codec, AD1938_PLL_CLK_CTRL0, reg);
+ snd_soc_write(codec, AD1938_DAC_CTRL2, reg);
return 0;
}
static int ad1938_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
- unsigned int mask, int slots, int width)
+ unsigned int rx_mask, int slots, int width)
{
struct snd_soc_codec *codec = dai->codec;
- int dac_reg = codec->read(codec, AD1938_DAC_CTRL1);
- int adc_reg = codec->read(codec, AD1938_ADC_CTRL2);
+ int dac_reg = snd_soc_read(codec, AD1938_DAC_CTRL1);
+ int adc_reg = snd_soc_read(codec, AD1938_ADC_CTRL2);
dac_reg &= ~AD1938_DAC_CHAN_MASK;
adc_reg &= ~AD1938_ADC_CHAN_MASK;
@@ -175,8 +174,8 @@ static int ad1938_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
return -EINVAL;
}
- codec->write(codec, AD1938_DAC_CTRL1, dac_reg);
- codec->write(codec, AD1938_ADC_CTRL2, adc_reg);
+ snd_soc_write(codec, AD1938_DAC_CTRL1, dac_reg);
+ snd_soc_write(codec, AD1938_ADC_CTRL2, adc_reg);
return 0;
}
@@ -187,8 +186,8 @@ static int ad1938_set_dai_fmt(struct snd_soc_dai *codec_dai,
struct snd_soc_codec *codec = codec_dai->codec;
int adc_reg, dac_reg;
- adc_reg = codec->read(codec, AD1938_ADC_CTRL2);
- dac_reg = codec->read(codec, AD1938_DAC_CTRL1);
+ adc_reg = snd_soc_read(codec, AD1938_ADC_CTRL2);
+ dac_reg = snd_soc_read(codec, AD1938_DAC_CTRL1);
/* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
* with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
@@ -265,8 +264,8 @@ static int ad1938_set_dai_fmt(struct snd_soc_dai *codec_dai,
return -EINVAL;
}
- codec->write(codec, AD1938_ADC_CTRL2, adc_reg);
- codec->write(codec, AD1938_DAC_CTRL1, dac_reg);
+ snd_soc_write(codec, AD1938_ADC_CTRL2, adc_reg);
+ snd_soc_write(codec, AD1938_DAC_CTRL1, dac_reg);
return 0;
}
@@ -295,134 +294,13 @@ static int ad1938_hw_params(struct snd_pcm_substream *substream,
break;
}
- reg = codec->read(codec, AD1938_DAC_CTRL2);
+ reg = snd_soc_read(codec, AD1938_DAC_CTRL2);
reg = (reg & (~AD1938_DAC_WORD_LEN_MASK)) | word_len;
- codec->write(codec, AD1938_DAC_CTRL2, reg);
+ snd_soc_write(codec, AD1938_DAC_CTRL2, reg);
- reg = codec->read(codec, AD1938_ADC_CTRL1);
+ reg = snd_soc_read(codec, AD1938_ADC_CTRL1);
reg = (reg & (~AD1938_ADC_WORD_LEN_MASK)) | word_len;
- codec->write(codec, AD1938_ADC_CTRL1, reg);
-
- return 0;
-}
-
-static int ad1938_set_bias_level(struct snd_soc_codec *codec,
- enum snd_soc_bias_level level)
-{
- switch (level) {
- case SND_SOC_BIAS_ON:
- ad1938_pll_powerctrl(codec, 1);
- break;
- case SND_SOC_BIAS_PREPARE:
- break;
- case SND_SOC_BIAS_STANDBY:
- case SND_SOC_BIAS_OFF:
- ad1938_pll_powerctrl(codec, 0);
- break;
- }
- codec->bias_level = level;
- return 0;
-}
-
-/*
- * interface to read/write ad1938 register
- */
-
-#define AD1938_SPI_ADDR 0x4
-#define AD1938_SPI_READ 0x1
-#define AD1938_SPI_BUFLEN 3
-
-/*
- * write to the ad1938 register space
- */
-
-static int ad1938_write_reg(struct snd_soc_codec *codec, unsigned int reg,
- unsigned int value)
-{
- u8 *reg_cache = codec->reg_cache;
- int ret = 0;
-
- if (value != reg_cache[reg]) {
- uint8_t buf[AD1938_SPI_BUFLEN];
- struct spi_transfer t = {
- .tx_buf = buf,
- .len = AD1938_SPI_BUFLEN,
- };
- struct spi_message m;
-
- buf[0] = AD1938_SPI_ADDR << 1;
- buf[1] = reg;
- buf[2] = value;
- spi_message_init(&m);
- spi_message_add_tail(&t, &m);
- ret = spi_sync(codec->control_data, &m);
- if (ret == 0)
- reg_cache[reg] = value;
- }
-
- return ret;
-}
-
-/*
- * read from the ad1938 register space cache
- */
-
-static unsigned int ad1938_read_reg_cache(struct snd_soc_codec *codec,
- unsigned int reg)
-{
- u8 *reg_cache = codec->reg_cache;
-
- if (reg >= codec->reg_cache_size)
- return -EINVAL;
-
- return reg_cache[reg];
-}
-
-/*
- * read from the ad1938 register space
- */
-
-static unsigned int ad1938_read_reg(struct snd_soc_codec *codec,
- unsigned int reg)
-{
- char w_buf[AD1938_SPI_BUFLEN];
- char r_buf[AD1938_SPI_BUFLEN];
- int ret;
-
- struct spi_transfer t = {
- .tx_buf = w_buf,
- .rx_buf = r_buf,
- .len = AD1938_SPI_BUFLEN,
- };
- struct spi_message m;
-
- w_buf[0] = (AD1938_SPI_ADDR << 1) | AD1938_SPI_READ;
- w_buf[1] = reg;
- w_buf[2] = 0;
-
- spi_message_init(&m);
- spi_message_add_tail(&t, &m);
- ret = spi_sync(codec->control_data, &m);
- if (ret == 0)
- return r_buf[2];
- else
- return -EIO;
-}
-
-static int ad1938_fill_cache(struct snd_soc_codec *codec)
-{
- int i;
- u8 *reg_cache = codec->reg_cache;
- struct spi_device *spi = codec->control_data;
-
- for (i = 0; i < codec->reg_cache_size; i++) {
- int ret = ad1938_read_reg(codec, i);
- if (ret == -EIO) {
- dev_err(&spi->dev, "AD1938 SPI read failure\n");
- return ret;
- }
- reg_cache[i] = ret;
- }
+ snd_soc_write(codec, AD1938_ADC_CTRL1, reg);
return 0;
}
@@ -512,32 +390,37 @@ static int ad1938_register(struct ad1938_priv *ad1938)
codec->owner = THIS_MODULE;
codec->dai = &ad1938_dai;
codec->num_dai = 1;
- codec->write = ad1938_write_reg;
- codec->read = ad1938_read_reg_cache;
- codec->set_bias_level = ad1938_set_bias_level;
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
ad1938_dai.dev = codec->dev;
ad1938_codec = codec;
+ memcpy(codec->reg_cache, ad1938_reg, AD1938_NUM_REGS);
+
+ ret = snd_soc_codec_set_cache_io(codec, 16, 8, SND_SOC_SPI);
+ if (ret < 0) {
+ dev_err(codec->dev, "failed to set cache I/O: %d\n",
+ ret);
+ kfree(ad1938);
+ return ret;
+ }
+
/* default setting for ad1938 */
/* unmute dac channels */
- codec->write(codec, AD1938_DAC_CHNL_MUTE, 0x0);
+ snd_soc_write(codec, AD1938_DAC_CHNL_MUTE, 0x0);
/* de-emphasis: 48kHz, powedown dac */
- codec->write(codec, AD1938_DAC_CTRL2, 0x1A);
+ snd_soc_write(codec, AD1938_DAC_CTRL2, 0x1A);
/* powerdown dac, dac in tdm mode */
- codec->write(codec, AD1938_DAC_CTRL0, 0x41);
+ snd_soc_write(codec, AD1938_DAC_CTRL0, 0x41);
/* high-pass filter enable */
- codec->write(codec, AD1938_ADC_CTRL0, 0x3);
+ snd_soc_write(codec, AD1938_ADC_CTRL0, 0x3);
/* sata delay=1, adc aux mode */
- codec->write(codec, AD1938_ADC_CTRL1, 0x43);
+ snd_soc_write(codec, AD1938_ADC_CTRL1, 0x43);
/* pll input: mclki/xi */
- codec->write(codec, AD1938_PLL_CLK_CTRL0, 0x9D);
- codec->write(codec, AD1938_PLL_CLK_CTRL1, 0x04);
-
- ad1938_fill_cache(codec);
+ snd_soc_write(codec, AD1938_PLL_CLK_CTRL0, 0x9D);
+ snd_soc_write(codec, AD1938_PLL_CLK_CTRL1, 0x04);
ret = snd_soc_register_codec(codec);
if (ret != 0) {
@@ -559,7 +442,6 @@ static int ad1938_register(struct ad1938_priv *ad1938)
static void ad1938_unregister(struct ad1938_priv *ad1938)
{
- ad1938_set_bias_level(&ad1938->codec, SND_SOC_BIAS_OFF);
snd_soc_unregister_dai(&ad1938_dai);
snd_soc_unregister_codec(&ad1938->codec);
kfree(ad1938);
@@ -593,7 +475,6 @@ static int ad1938_probe(struct platform_device *pdev)
ARRAY_SIZE(ad1938_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
- ad1938_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
pcm_err:
return ret;
@@ -610,37 +491,9 @@ static int ad1938_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_PM
-static int ad1938_suspend(struct platform_device *pdev,
- pm_message_t state)
-{
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct snd_soc_codec *codec = socdev->card->codec;
-
- ad1938_set_bias_level(codec, SND_SOC_BIAS_OFF);
- return 0;
-}
-
-static int ad1938_resume(struct platform_device *pdev)
-{
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct snd_soc_codec *codec = socdev->card->codec;
-
- if (codec->suspend_bias_level == SND_SOC_BIAS_ON)
- ad1938_set_bias_level(codec, SND_SOC_BIAS_ON);
-
- return 0;
-}
-#else
-#define ad1938_suspend NULL
-#define ad1938_resume NULL
-#endif
-
struct snd_soc_codec_device soc_codec_dev_ad1938 = {
.probe = ad1938_probe,
.remove = ad1938_remove,
- .suspend = ad1938_suspend,
- .resume = ad1938_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_ad1938);
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