Modified: trunk/sound/soc/codecs/ad1938.c (6616 => 6617)
--- trunk/sound/soc/codecs/ad1938.c 2009-06-09 06:42:00 UTC (rev 6616)
+++ trunk/sound/soc/codecs/ad1938.c 2009-06-09 09:17:35 UTC (rev 6617)
@@ -25,35 +25,54 @@
#include <linux/spi/spi.h>
#include "ad1938.h"
-struct snd_soc_dai ad1938_dai = {
- .name = "AD1938",
- .playback = {
- .stream_name = "Playback",
- .channels_min = 2,
- .channels_max = 8,
- .rates = SNDRV_PCM_RATE_48000,
- .formats = SNDRV_PCM_FMTBIT_S32_LE, },
- .capture = {
- .stream_name = "Capture",
- .channels_min = 2,
- .channels_max = 4,
- .rates = SNDRV_PCM_RATE_48000,
- .formats = SNDRV_PCM_FMTBIT_S32_LE, },
+struct snd_soc_device *ad1938_socdev;
+
+/* struct to flag whether adc and dac need power to work */
+struct ad1938_pwr_sta {
+ int adc_pwr;
+ int dac_pwr;
};
-EXPORT_SYMBOL_GPL(ad1938_dai);
-struct snd_soc_device *ad1938_socdev;
+/* dac de-emphasis enum control */
+static const char *ad1938_deemp[] = {"flat", "48kHz", "44.1kHz", "32kHz"};
-/* DAC volume controls */
+static const struct soc_enum ad1938_enum[] = {
+ SOC_ENUM_SINGLE(AD1938_DAC_CTRL2, 1, 4, ad1938_deemp),
+};
+
+/* AD1938 volume/mute/de-emphasis etc. controls */
static const struct snd_kcontrol_new ad1938_snd_controls[] = {
- SOC_SINGLE("DAC L1", AD1938_DAC_L1_VOL, 0, 0xFF, 1),
- SOC_SINGLE("DAC R1", AD1938_DAC_R1_VOL, 0, 0xFF, 1),
- SOC_SINGLE("DAC L2", AD1938_DAC_L2_VOL, 0, 0xFF, 1),
- SOC_SINGLE("DAC R2", AD1938_DAC_R2_VOL, 0, 0xFF, 1),
- SOC_SINGLE("DAC L3", AD1938_DAC_L3_VOL, 0, 0xFF, 1),
- SOC_SINGLE("DAC R3", AD1938_DAC_R3_VOL, 0, 0xFF, 1),
- SOC_SINGLE("DAC L4", AD1938_DAC_L4_VOL, 0, 0xFF, 1),
- SOC_SINGLE("DAC R4", AD1938_DAC_R4_VOL, 0, 0xFF, 1),
+ /* DAC volume control */
+ SOC_SINGLE("DAC L1 Volume", AD1938_DAC_L1_VOL, 0, 0xFF, 1),
+ SOC_SINGLE("DAC R1 Volume", AD1938_DAC_R1_VOL, 0, 0xFF, 1),
+ SOC_SINGLE("DAC L2 Volume", AD1938_DAC_L2_VOL, 0, 0xFF, 1),
+ SOC_SINGLE("DAC R2 Volume", AD1938_DAC_R2_VOL, 0, 0xFF, 1),
+ SOC_SINGLE("DAC L3 Volume", AD1938_DAC_L3_VOL, 0, 0xFF, 1),
+ SOC_SINGLE("DAC R3 Volume", AD1938_DAC_R3_VOL, 0, 0xFF, 1),
+ SOC_SINGLE("DAC L4 Volume", AD1938_DAC_L4_VOL, 0, 0xFF, 1),
+ SOC_SINGLE("DAC R4 Volume", AD1938_DAC_R4_VOL, 0, 0xFF, 1),
+
+ /* DAC mute control */
+ SOC_SINGLE("DAC L1 Switch", AD1938_DAC_CHNL_MUTE, 0, 1, 1),
+ SOC_SINGLE("DAC R1 Switch", AD1938_DAC_CHNL_MUTE, 1, 1, 1),
+ SOC_SINGLE("DAC L2 Switch", AD1938_DAC_CHNL_MUTE, 2, 1, 1),
+ SOC_SINGLE("DAC R2 Switch", AD1938_DAC_CHNL_MUTE, 3, 1, 1),
+ SOC_SINGLE("DAC L3 Switch", AD1938_DAC_CHNL_MUTE, 4, 1, 1),
+ SOC_SINGLE("DAC R3 Switch", AD1938_DAC_CHNL_MUTE, 5, 1, 1),
+ SOC_SINGLE("DAC L4 Switch", AD1938_DAC_CHNL_MUTE, 6, 1, 1),
+ SOC_SINGLE("DAC R4 Switch", AD1938_DAC_CHNL_MUTE, 7, 1, 1),
+
+ /* ADC mute control */
+ SOC_SINGLE("ADC L1 Switch", AD1938_ADC_CTRL0, ADC0_MUTE, 1, 1),
+ SOC_SINGLE("ADC R1 Switch", AD1938_ADC_CTRL0, ADC1_MUTE, 1, 1),
+ SOC_SINGLE("ADC L2 Switch", AD1938_ADC_CTRL0, ADC2_MUTE, 1, 1),
+ SOC_SINGLE("ADC R2 Switch", AD1938_ADC_CTRL0, ADC3_MUTE, 1, 1),
+
+ /* ADC high-pass filter */
+ SOC_SINGLE("ADC High Pass Filter Switch", AD1938_ADC_CTRL0, ADC_HIGHPASS_FILTER, 1, 0),
+
+ /* DAC de-emphasis */
+ SOC_ENUM("Playback Deemphasis", ad1938_enum[0]),
};
/* add non dapm controls */
@@ -71,7 +90,109 @@
return 0;
}
+/* dai_ops.digital_mute entry */
+static int ad1938_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ if (!mute)
+ codec->write(codec, AD1938_DAC_CHNL_MUTE, 0);
+ else
+ codec->write(codec, AD1938_DAC_CHNL_MUTE, 0xff);
+
+ return 0;
+}
+
+/* dai_ops.set_pll entry */
+static int ad1938_set_pll(struct snd_soc_dai *codec_dai,
+ int pll_id, unsigned int freq_in, unsigned int freq_out)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ int pll_reg;
+
+ if (freq_out) {
+ pll_reg = codec->read(codec, AD1938_PLL_CLK_CTRL0);
+ pll_reg &= ~PLL_POWERDOWN;
+ } else {
+ pll_reg = codec->read(codec, AD1938_PLL_CLK_CTRL0);
+ pll_reg |= PLL_POWERDOWN;
+ }
+ codec->write(codec, AD1938_PLL_CLK_CTRL0, pll_reg);
+
+ return 0;
+}
+
+/* ops.prepare entry */
+static int ad1938_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->codec;
+ struct ad1938_pwr_sta *pwr_sta = codec->private_data;
+ int pwr_reg;
+
+ /* set active */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* If not poweron adc, dac can't work */
+ pwr_reg = codec->read(codec, AD1938_ADC_CTRL0);
+ if (pwr_reg & ADC_POWERDOWN)
+ codec->write(codec, AD1938_ADC_CTRL0, pwr_reg & ~ADC_POWERDOWN);
+
+ /* poweron dac */
+ pwr_reg = codec->read(codec, AD1938_DAC_CTRL0);
+ pwr_reg &= ~DAC_POWERDOWN;
+ codec->write(codec, AD1938_DAC_CTRL0, pwr_reg);
+
+ pwr_sta->dac_pwr = 1;
+ } else {
+ /* poweron adc */
+ pwr_reg = codec->read(codec, AD1938_ADC_CTRL0);
+ pwr_reg &= ~ADC_POWERDOWN;
+ codec->write(codec, AD1938_ADC_CTRL0, pwr_reg);
+
+ pwr_sta->adc_pwr = 1;
+ }
+
+ return 0;
+}
+
+
+/* ops.shutdown entry */
+static void ad1938_pcm_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->codec;
+ struct ad1938_pwr_sta *pwr_sta = codec->private_data;
+ int pwr_reg;
+
+ /* deactivate */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* poweroff dac */
+ pwr_reg = codec->read(codec, AD1938_DAC_CTRL0);
+ pwr_reg |= DAC_POWERDOWN;
+ codec->write(codec, AD1938_DAC_CTRL0, pwr_reg);
+
+ pwr_sta->dac_pwr = 0;
+
+ /* after poweroff dac, if adc is not opened, poweroff it too */
+ if (pwr_sta->adc_pwr == 0) {
+ pwr_reg = codec->read(codec, AD1938_ADC_CTRL0);
+ pwr_reg |= ADC_POWERDOWN;
+ codec->write(codec, AD1938_ADC_CTRL0, pwr_reg);
+ }
+ } else {
+ /* if dac is still working, can't shutdown adc */
+ if (pwr_sta->dac_pwr == 0) {
+ pwr_reg = codec->read(codec, AD1938_ADC_CTRL0);
+ pwr_reg |= ADC_POWERDOWN;
+ codec->write(codec, AD1938_ADC_CTRL0, pwr_reg);
+ }
+
+ pwr_sta->adc_pwr = 0;
+ }
+}
+
/*
* interface to read/write ad1938 register
*/
@@ -166,6 +287,32 @@
spi_unregister_driver(&ad1938_spi_driver);
}
+/* codec DAI instance */
+struct snd_soc_dai ad1938_dai = {
+ .name = "AD1938",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE, },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 4,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE, },
+ .ops = {
+ .prepare = ad1938_pcm_prepare,
+ .shutdown = ad1938_pcm_shutdown,
+ },
+ .dai_ops = {
+ .digital_mute = ad1938_mute,
+ .set_pll = ad1938_set_pll,
+ },
+};
+EXPORT_SYMBOL_GPL(ad1938_dai);
+
static int ad1938_soc_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@@ -173,7 +320,7 @@
int ret = 0;
/* codec alloc and init */
- codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+ codec = kzalloc(sizeof(struct snd_soc_codec) + sizeof(struct ad1938_pwr_sta), GFP_KERNEL);
if (codec == NULL)
return -ENOMEM;
mutex_init(&codec->mutex);
@@ -183,6 +330,7 @@
codec->num_dai = 1;
codec->write = ad1938_reg_write;
codec->read = ad1938_reg_read;
+ codec->private_data = codec + 1;
socdev->codec = codec;
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
@@ -210,18 +358,20 @@
}
/* default setting for ad1938: 8 channel AUX ADC mode, 16bit, 48000Hz */
- codec->write(codec, AD1938_DAC_CTRL0, 0x40);
- codec->write(codec, AD1938_DAC_CTRL1, 0x84);
- codec->write(codec, AD1938_DAC_CTRL2, 0x1A);
- codec->write(codec, AD1938_ADC_CTRL0, 0x32);
- codec->write(codec, AD1938_ADC_CTRL1, 0x43);
- codec->write(codec, AD1938_ADC_CTRL2, 0x6f);
- codec->write(codec, AD1938_PLL_CLK_CTRL0, 0x9C);
+ codec->write(codec, AD1938_DAC_CTRL0, 0x41); /* sample rate:32/44.1/48kHz, sata delay=1, tdm mode */
+ codec->write(codec, AD1938_DAC_CTRL1, 0x84); /* invert bclk, 256bclk/frame, latch in mid */
+ codec->write(codec, AD1938_DAC_CTRL2, 0x1A); /* de-emphasis: 48kHz */
+ codec->write(codec, AD1938_ADC_CTRL0, 0x33); /* high-pass filter enable */
+ codec->write(codec, AD1938_ADC_CTRL1, 0x43); /* sata delay=1, adc aux mode */
+ codec->write(codec, AD1938_ADC_CTRL2, 0x6F); /* left high, driver on rising edge */
+ codec->write(codec, AD1938_DAC_CHNL_MUTE, 0xFF); /* mute all dac channels */
+ codec->write(codec, AD1938_PLL_CLK_CTRL0, 0x9C); /* pll input:mclki/xi, master clock rate:512*fs */
codec->write(codec, AD1938_PLL_CLK_CTRL1, 0x04);
/* register controls for ad1938 */
ad1938_add_controls(codec);
+ printk(KERN_INFO "Analog Devices AD1938 codec registered\n");
return ret;
register_err:
