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Subject[PATCH 4/4 v2] ASoC: TWL4030: Driver registration via twl4030_codec MFD
Date
Change the way how the twl4030 soc codec driver is
loaded/probed.
Use the device probing via tlw4030_codec MFD device.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
---
sound/soc/codecs/Kconfig | 1 +
sound/soc/codecs/twl4030.c | 203 +++++++++++++++++++++++++++-----------------
2 files changed, 127 insertions(+), 77 deletions(-)
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index d30fce7..3df3497 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -147,6 +147,7 @@ config SND_SOC_TLV320DAC33
tristate

config SND_SOC_TWL4030
+ select TWL4030_CODEC
tristate

config SND_SOC_UDA134X
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index 559e9b2..5c5a4c0 100644
--- a/sound/soc/codecs/twl4030.c
+++ b/sound/soc/codecs/twl4030.c
@@ -120,6 +120,8 @@ static const u8 twl4030_reg[TWL4030_CACHEREGNUM] = {

/* codec private data */
struct twl4030_priv {
+ struct snd_soc_codec codec;
+
unsigned int bypass_state;
unsigned int codec_powered;
unsigned int codec_muted;
@@ -183,19 +185,20 @@ static int twl4030_write(struct snd_soc_codec *codec,
static void twl4030_codec_enable(struct snd_soc_codec *codec, int enable)
{
struct twl4030_priv *twl4030 = codec->private_data;
- u8 mode;
+ int mode;

if (enable == twl4030->codec_powered)
return;

- mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
if (enable)
- mode |= TWL4030_CODECPDZ;
+ mode = twl4030_codec_enable_resource(TWL4030_CODEC_RES_POWER);
else
- mode &= ~TWL4030_CODECPDZ;
+ mode = twl4030_codec_disable_resource(TWL4030_CODEC_RES_POWER);

- twl4030_write(codec, TWL4030_REG_CODEC_MODE, mode);
- twl4030->codec_powered = enable;
+ if (mode >= 0) {
+ twl4030_write_reg_cache(codec, TWL4030_REG_CODEC_MODE, mode);
+ twl4030->codec_powered = enable;
+ }

/* REVISIT: this delay is present in TI sample drivers */
/* but there seems to be no TRM requirement for it */
@@ -219,22 +222,20 @@ static void twl4030_init_chip(struct snd_soc_codec *codec)
static void twl4030_codec_mute(struct snd_soc_codec *codec, int mute)
{
struct twl4030_priv *twl4030 = codec->private_data;
- u8 reg_val;
+ int status;

if (mute == twl4030->codec_muted)
return;

- if (mute) {
+ if (mute)
/* Disable PLL */
- reg_val = twl4030_read_reg_cache(codec, TWL4030_REG_APLL_CTL);
- reg_val &= ~TWL4030_APLL_EN;
- twl4030_write(codec, TWL4030_REG_APLL_CTL, reg_val);
- } else {
+ status = twl4030_codec_disable_resource(TWL4030_CODEC_RES_APLL);
+ else
/* Enable PLL */
- reg_val = twl4030_read_reg_cache(codec, TWL4030_REG_APLL_CTL);
- reg_val |= TWL4030_APLL_EN;
- twl4030_write(codec, TWL4030_REG_APLL_CTL, reg_val);
- }
+ status = twl4030_codec_enable_resource(TWL4030_CODEC_RES_APLL);
+
+ if (status >= 0)
+ twl4030_write_reg_cache(codec, TWL4030_REG_APLL_CTL, status);

twl4030->codec_muted = mute;
}
@@ -2123,7 +2124,7 @@ struct snd_soc_dai twl4030_dai[] = {
};
EXPORT_SYMBOL_GPL(twl4030_dai);

-static int twl4030_suspend(struct platform_device *pdev, pm_message_t state)
+static int twl4030_soc_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;
@@ -2133,7 +2134,7 @@ static int twl4030_suspend(struct platform_device *pdev, pm_message_t state)
return 0;
}

-static int twl4030_resume(struct platform_device *pdev)
+static int twl4030_soc_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
@@ -2143,32 +2144,21 @@ static int twl4030_resume(struct platform_device *pdev)
return 0;
}

-/*
- * initialize the driver
- * register the mixer and dsp interfaces with the kernel
- */
+static struct snd_soc_codec *twl4030_codec;

-static int twl4030_init(struct snd_soc_device *socdev)
+static int twl4030_soc_probe(struct platform_device *pdev)
{
- struct snd_soc_codec *codec = socdev->card->codec;
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct twl4030_setup_data *setup = socdev->codec_data;
- struct twl4030_priv *twl4030 = codec->private_data;
- int ret = 0;
+ struct snd_soc_codec *codec;
+ struct twl4030_priv *twl4030;
+ int ret;

- printk(KERN_INFO "TWL4030 Audio Codec init \n");
+ BUG_ON(!twl4030_codec);

- codec->name = "twl4030";
- codec->owner = THIS_MODULE;
- codec->read = twl4030_read_reg_cache;
- codec->write = twl4030_write;
- codec->set_bias_level = twl4030_set_bias_level;
- codec->dai = twl4030_dai;
- codec->num_dai = ARRAY_SIZE(twl4030_dai),
- codec->reg_cache_size = sizeof(twl4030_reg);
- codec->reg_cache = kmemdup(twl4030_reg, sizeof(twl4030_reg),
- GFP_KERNEL);
- if (codec->reg_cache == NULL)
- return -ENOMEM;
+ codec = twl4030_codec;
+ twl4030 = codec->private_data;
+ socdev->card->codec = codec;

/* Configuration for headset ramp delay from setup data */
if (setup) {
@@ -2190,100 +2180,159 @@ static int twl4030_init(struct snd_soc_device *socdev)
/* register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
- printk(KERN_ERR "twl4030: failed to create pcms\n");
- goto pcm_err;
+ dev_err(&pdev->dev, "failed to create pcms\n");
+ return ret;
}

- twl4030_init_chip(codec);
-
- /* power on device */
- twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
snd_soc_add_controls(codec, twl4030_snd_controls,
ARRAY_SIZE(twl4030_snd_controls));
twl4030_add_widgets(codec);

ret = snd_soc_init_card(socdev);
if (ret < 0) {
- printk(KERN_ERR "twl4030: failed to register card\n");
+ dev_err(&pdev->dev, "failed to register card\n");
goto card_err;
}

- return ret;
+ return 0;

card_err:
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
-pcm_err:
- kfree(codec->reg_cache);
+
return ret;
}

-static struct snd_soc_device *twl4030_socdev;
-
-static int twl4030_probe(struct platform_device *pdev)
+static int twl4030_soc_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ twl4030_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+ kfree(codec->private_data);
+ kfree(codec);
+
+ return 0;
+}
+
+static int __devinit twl4030_codec_probe(struct platform_device *pdev)
+{
+ struct twl4030_codec_audio_data *pdata = pdev->dev.platform_data;
struct snd_soc_codec *codec;
struct twl4030_priv *twl4030;
+ int ret;

- codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
- if (codec == NULL)
- return -ENOMEM;
+ if (!pdata || !(pdata->audio_mclk == 19200000 ||
+ pdata->audio_mclk == 26000000 ||
+ pdata->audio_mclk == 38400000)) {
+ dev_err(&pdev->dev, "Invalid platform_data\n");
+ return -EINVAL;
+ }

twl4030 = kzalloc(sizeof(struct twl4030_priv), GFP_KERNEL);
if (twl4030 == NULL) {
- kfree(codec);
+ dev_err(&pdev->dev, "Can not allocate memroy\n");
return -ENOMEM;
}

+ codec = &twl4030->codec;
codec->private_data = twl4030;
- socdev->card->codec = codec;
+ codec->dev = &pdev->dev;
+ twl4030_dai[0].dev = &pdev->dev;
+ twl4030_dai[1].dev = &pdev->dev;
+
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);

- twl4030_socdev = socdev;
- twl4030_init(socdev);
+ codec->name = "twl4030";
+ codec->owner = THIS_MODULE;
+ codec->read = twl4030_read_reg_cache;
+ codec->write = twl4030_write;
+ codec->set_bias_level = twl4030_set_bias_level;
+ codec->dai = twl4030_dai;
+ codec->num_dai = ARRAY_SIZE(twl4030_dai),
+ codec->reg_cache_size = sizeof(twl4030_reg);
+ codec->reg_cache = kmemdup(twl4030_reg, sizeof(twl4030_reg),
+ GFP_KERNEL);
+ if (codec->reg_cache == NULL) {
+ ret = -ENOMEM;
+ goto error_cache;
+ }
+
+ platform_set_drvdata(pdev, twl4030);
+ twl4030_codec = codec;
+
+ /* Set the defaults, and power up the codec */
+ twl4030_init_chip(codec);
+ twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+ ret = snd_soc_register_codec(codec);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to register codec: %d\n", ret);
+ goto error_codec;
+ }
+
+ ret = snd_soc_register_dais(&twl4030_dai[0], ARRAY_SIZE(twl4030_dai));
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
+ snd_soc_unregister_codec(codec);
+ goto error_codec;
+ }

return 0;
+
+error_codec:
+ twl4030_power_down(codec);
+ kfree(codec->reg_cache);
+error_cache:
+ kfree(twl4030);
+ return ret;
}

-static int twl4030_remove(struct platform_device *pdev)
+static int __devexit twl4030_codec_remove(struct platform_device *pdev)
{
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct snd_soc_codec *codec = socdev->card->codec;
+ struct twl4030_priv *twl4030 = platform_get_drvdata(pdev);

- printk(KERN_INFO "TWL4030 Audio Codec remove\n");
- twl4030_set_bias_level(codec, SND_SOC_BIAS_OFF);
- snd_soc_free_pcms(socdev);
- snd_soc_dapm_free(socdev);
- kfree(codec->private_data);
- kfree(codec);
+ kfree(twl4030);

+ twl4030_codec = NULL;
return 0;
}

-struct snd_soc_codec_device soc_codec_dev_twl4030 = {
- .probe = twl4030_probe,
- .remove = twl4030_remove,
- .suspend = twl4030_suspend,
- .resume = twl4030_resume,
+MODULE_ALIAS("platform:twl4030_codec_audio");
+
+static struct platform_driver twl4030_codec_driver = {
+ .probe = twl4030_codec_probe,
+ .remove = __devexit_p(twl4030_codec_remove),
+ .driver = {
+ .name = "twl4030_codec_audio",
+ .owner = THIS_MODULE,
+ },
};
-EXPORT_SYMBOL_GPL(soc_codec_dev_twl4030);

static int __init twl4030_modinit(void)
{
- return snd_soc_register_dais(&twl4030_dai[0], ARRAY_SIZE(twl4030_dai));
+ return platform_driver_register(&twl4030_codec_driver);
}
module_init(twl4030_modinit);

static void __exit twl4030_exit(void)
{
- snd_soc_unregister_dais(&twl4030_dai[0], ARRAY_SIZE(twl4030_dai));
+ platform_driver_unregister(&twl4030_codec_driver);
}
module_exit(twl4030_exit);

+struct snd_soc_codec_device soc_codec_dev_twl4030 = {
+ .probe = twl4030_soc_probe,
+ .remove = twl4030_soc_remove,
+ .suspend = twl4030_soc_suspend,
+ .resume = twl4030_soc_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_twl4030);
+
MODULE_DESCRIPTION("ASoC TWL4030 codec driver");
MODULE_AUTHOR("Steve Sakoman");
MODULE_LICENSE("GPL");
--
1.6.5.1


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