* - The machine driver's 'startup' function must call
* cs4270_set_dai_sysclk() with the value of MCLK.
* - Only I2S and left-justified modes are supported
- * - Power management is not supported
+ * - Power management is supported
*/
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/slab.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
#include "cs4270.h"
#define CS4270_PWRCTL_PDN_ADC 0x20
#define CS4270_PWRCTL_PDN_DAC 0x02
#define CS4270_PWRCTL_PDN 0x01
+#define CS4270_PWRCTL_PDN_ALL \
+ (CS4270_PWRCTL_PDN_ADC | CS4270_PWRCTL_PDN_DAC | CS4270_PWRCTL_PDN)
#define CS4270_MODE_SPEED_MASK 0x30
#define CS4270_MODE_1X 0x00
#define CS4270_MODE_2X 0x10
#define CS4270_MUTE_DAC_A 0x01
#define CS4270_MUTE_DAC_B 0x02
+static const char *supply_names[] = {
+ "va", "vd", "vlc"
+};
+
/* Private data for the CS4270 */
struct cs4270_private {
struct snd_soc_codec codec;
unsigned int mode; /* The mode (I2S or left-justified) */
unsigned int slave_mode;
unsigned int manual_mute;
+
+ /* power domain regulators */
+ struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
};
/**
* This function must be called by the machine driver's 'startup' function,
* otherwise the list of supported sample rates will not be available in
* time for ALSA.
+ *
+ * For setups with variable MCLKs, pass 0 as 'freq' argument. This will cause
+ * theoretically possible sample rates to be enabled. Call it again with a
+ * proper value set one the external clock is set (most probably you would do
+ * that from a machine's driver 'hw_param' hook.
*/
static int cs4270_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
- struct cs4270_private *cs4270 = codec->private_data;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
unsigned int rates = 0;
unsigned int rate_min = -1;
unsigned int rate_max = 0;
cs4270->mclk = freq;
- for (i = 0; i < NUM_MCLK_RATIOS; i++) {
- unsigned int rate = freq / cs4270_mode_ratios[i].ratio;
- rates |= snd_pcm_rate_to_rate_bit(rate);
- if (rate < rate_min)
- rate_min = rate;
- if (rate > rate_max)
- rate_max = rate;
- }
- /* FIXME: soc should support a rate list */
- rates &= ~SNDRV_PCM_RATE_KNOT;
+ if (cs4270->mclk) {
+ for (i = 0; i < NUM_MCLK_RATIOS; i++) {
+ unsigned int rate = freq / cs4270_mode_ratios[i].ratio;
+ rates |= snd_pcm_rate_to_rate_bit(rate);
+ if (rate < rate_min)
+ rate_min = rate;
+ if (rate > rate_max)
+ rate_max = rate;
+ }
+ /* FIXME: soc should support a rate list */
+ rates &= ~SNDRV_PCM_RATE_KNOT;
- if (!rates) {
- dev_err(codec->dev, "could not find a valid sample rate\n");
- return -EINVAL;
+ if (!rates) {
+ dev_err(codec->dev, "could not find a valid sample rate\n");
+ return -EINVAL;
+ }
+ } else {
+ /* enable all possible rates */
+ rates = SNDRV_PCM_RATE_8000_192000;
+ rate_min = 8000;
+ rate_max = 192000;
}
codec_dai->playback.rates = rates;
unsigned int format)
{
struct snd_soc_codec *codec = codec_dai->codec;
- struct cs4270_private *cs4270 = codec->private_data;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
int ret = 0;
/* set DAI format */
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
- struct cs4270_private *cs4270 = codec->private_data;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
int ret;
unsigned int i;
unsigned int rate;
static int cs4270_dai_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
- struct cs4270_private *cs4270 = codec->private_data;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
int reg6;
reg6 = snd_soc_read(codec, CS4270_MUTE);
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
- struct cs4270_private *cs4270 = codec->private_data;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
int left = !ucontrol->value.integer.value[0];
int right = !ucontrol->value.integer.value[1];
SOC_SINGLE("Digital Sidetone Switch", CS4270_FORMAT, 5, 1, 0),
SOC_SINGLE("Soft Ramp Switch", CS4270_TRANS, 6, 1, 0),
SOC_SINGLE("Zero Cross Switch", CS4270_TRANS, 5, 1, 0),
+ SOC_SINGLE("De-emphasis filter", CS4270_TRANS, 0, 1, 0),
SOC_SINGLE("Popguard Switch", CS4270_MODE, 0, 1, 1),
SOC_SINGLE("Auto-Mute Switch", CS4270_MUTE, 5, 1, 0),
SOC_DOUBLE("Master Capture Switch", CS4270_MUTE, 3, 4, 1, 1),
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = cs4270_codec;
- int ret;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
+ int i, ret;
/* Connect the codec to the socdev. snd_soc_new_pcms() needs this. */
socdev->card->codec = codec;
goto error_free_pcms;
}
- /* And finally, register the socdev */
- ret = snd_soc_init_card(socdev);
- if (ret < 0) {
- dev_err(codec->dev, "failed to register card\n");
+ /* get the power supply regulators */
+ for (i = 0; i < ARRAY_SIZE(supply_names); i++)
+ cs4270->supplies[i].supply = supply_names[i];
+
+ ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(cs4270->supplies),
+ cs4270->supplies);
+ if (ret < 0)
goto error_free_pcms;
- }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
+ cs4270->supplies);
+ if (ret < 0)
+ goto error_free_regulators;
return 0;
+error_free_regulators:
+ regulator_bulk_free(ARRAY_SIZE(cs4270->supplies),
+ cs4270->supplies);
+
error_free_pcms:
snd_soc_free_pcms(socdev);
static int cs4270_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = cs4270_codec;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
snd_soc_free_pcms(socdev);
+ regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies), cs4270->supplies);
+ regulator_bulk_free(ARRAY_SIZE(cs4270->supplies), cs4270->supplies);
return 0;
};
codec->owner = THIS_MODULE;
codec->dai = &cs4270_dai;
codec->num_dai = 1;
- codec->private_data = cs4270;
+ snd_soc_codec_set_drvdata(codec, cs4270);
codec->control_data = i2c_client;
codec->read = cs4270_read_reg_cache;
codec->write = cs4270_i2c_write;
};
MODULE_DEVICE_TABLE(i2c, cs4270_id);
+#ifdef CONFIG_PM
+
+/* This suspend/resume implementation can handle both - a simple standby
+ * where the codec remains powered, and a full suspend, where the voltage
+ * domain the codec is connected to is teared down and/or any other hardware
+ * reset condition is asserted.
+ *
+ * The codec's own power saving features are enabled in the suspend callback,
+ * and all registers are written back to the hardware when resuming.
+ */
+
+static int cs4270_soc_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ struct snd_soc_codec *codec = cs4270_codec;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
+ int reg, ret;
+
+ reg = snd_soc_read(codec, CS4270_PWRCTL) | CS4270_PWRCTL_PDN_ALL;
+ if (reg < 0)
+ return reg;
+
+ ret = snd_soc_write(codec, CS4270_PWRCTL, reg);
+ if (ret < 0)
+ return ret;
+
+ regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies),
+ cs4270->supplies);
+
+ return 0;
+}
+
+static int cs4270_soc_resume(struct platform_device *pdev)
+{
+ struct snd_soc_codec *codec = cs4270_codec;
+ struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
+ struct i2c_client *i2c_client = codec->control_data;
+ int reg;
+
+ regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
+ cs4270->supplies);
+
+ /* In case the device was put to hard reset during sleep, we need to
+ * wait 500ns here before any I2C communication. */
+ ndelay(500);
+
+ /* first restore the entire register cache ... */
+ for (reg = CS4270_FIRSTREG; reg <= CS4270_LASTREG; reg++) {
+ u8 val = snd_soc_read(codec, reg);
+
+ if (i2c_smbus_write_byte_data(i2c_client, reg, val)) {
+ dev_err(codec->dev, "i2c write failed\n");
+ return -EIO;
+ }
+ }
+
+ /* ... then disable the power-down bits */
+ reg = snd_soc_read(codec, CS4270_PWRCTL);
+ reg &= ~CS4270_PWRCTL_PDN_ALL;
+
+ return snd_soc_write(codec, CS4270_PWRCTL, reg);
+}
+#else
+#define cs4270_soc_suspend NULL
+#define cs4270_soc_resume NULL
+#endif /* CONFIG_PM */
+
/*
* cs4270_i2c_driver - I2C device identification
*
*/
struct snd_soc_codec_device soc_codec_device_cs4270 = {
.probe = cs4270_probe,
- .remove = cs4270_remove
+ .remove = cs4270_remove,
+ .suspend = cs4270_soc_suspend,
+ .resume = cs4270_soc_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_device_cs4270);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff