ASoC: multi-component - ASoC Multi-Component Support

This patch extends the ASoC API to allow sound cards to have more than one
CODEC and more than one platform DMA controller. This is achieved by dividing
some current ASoC structures that contain both driver data and device data into
structures that only either contain device data or driver data. i.e.

 struct snd_soc_codec    --->  struct snd_soc_codec (device data)
                          +->  struct snd_soc_codec_driver (driver data)

 struct snd_soc_platform --->  struct snd_soc_platform (device data)
                          +->  struct snd_soc_platform_driver (driver data)

 struct snd_soc_dai      --->  struct snd_soc_dai (device data)
                          +->  struct snd_soc_dai_driver (driver data)

 struct snd_soc_device   --->  deleted

This now allows ASoC to be more tightly aligned with the Linux driver model and
also means that every ASoC codec, platform and (platform) DAI is a kernel
device. ASoC component private data is now stored as device private data.

The ASoC sound card struct snd_soc_card has also been updated to store lists
of it's components rather than a pointer to a codec and platform. The PCM
runtime struct soc_pcm_runtime now has pointers to all its components.

This patch adds DAPM support for ASoC multi-component and removes struct
snd_soc_socdev from DAPM core. All DAPM calls are now made on a card, codec
or runtime PCM level basis rather than using snd_soc_socdev.

Other notable multi-component changes:-

 * Stream operations now de-reference less structures.
 * close_delayed work() now runs on a DAI basis rather than looping all DAIs
   in a card.
 * PM suspend()/resume() operations can now handle N CODECs and Platforms
   per sound card.
 * Added soc_bind_dai_link() to bind the component devices to the sound card.
 * Added soc_dai_link_probe() and soc_dai_link_remove() to probe and remove
   DAI link components.
 * sysfs entries can now be registered per component per card.
 * snd_soc_new_pcms() functionailty rolled into dai_link_probe().
 * snd_soc_register_codec() now does all the codec list and mutex init.

This patch changes the probe() and remove() of the CODEC drivers as follows:-

 o Make CODEC driver a platform driver
 o Moved all struct snd_soc_codec list, mutex, etc initialiasation to core.
 o Removed all static codec pointers (drivers now support > 1 codec dev)
 o snd_soc_register_pcms() now done by core.
 o snd_soc_register_dai() folded into snd_soc_register_codec().

CS4270 portions:
Acked-by: Timur Tabi <timur@freescale.com>

Some TLV320aic23 and Cirrus platform fixes.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>

TI CODEC and OMAP fixes
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>

Samsung platform and misc fixes :-
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>

MPC8610 and PPC fixes.
Signed-off-by: Timur Tabi <timur@freescale.com>

i.MX fixes and some core fixes.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

J4740 platform fixes:-
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

CC: Tony Lindgren <tony@atomide.com>
CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Kevin Hilman <khilman@deeprootsystems.com>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
CC: Kuninori Morimoto <morimoto.kuninori@renesas.com>
CC: Daniel Gloeckner <dg@emlix.com>
CC: Manuel Lauss <mano@roarinelk.homelinux.net>
CC: Mike Frysinger <vapier.adi@gmail.com>
CC: Arnaud Patard <apatard@mandriva.com>
CC: Wan ZongShun <mcuos.com@gmail.com>

Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 55 insertions, 136 deletions

diff --git a/sound/soc/codecs/ad1836.c b/sound/soc/codecs/ad1836.c
index a01006c8c606..d272534c8f84 100644
--- a/sound/soc/codecs/ad1836.c
+++ b/sound/soc/codecs/ad1836.c
@@ -33,15 +33,10 @@
 
 /* codec private data */
 struct ad1836_priv {
-	struct snd_soc_codec codec;
-	u16 reg_cache[AD1836_NUM_REGS];
+	enum snd_soc_control_type control_type;
+	void *control_data;
 };
 
-static struct snd_soc_codec *ad1836_codec;
-struct snd_soc_codec_device soc_codec_dev_ad1836;
-static int ad1836_register(struct ad1836_priv *ad1836);
-static void ad1836_unregister(struct ad1836_priv *ad1836);
-
 /*
  * AD1836 volume/mute/de-emphasis etc. controls
  */
@@ -146,8 +141,7 @@ static int ad1836_hw_params(struct snd_pcm_substream *substream,
 	int word_len = 0;
 
 	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 snd_soc_codec *codec = rtd->codec;
 
 	/* bit size */
 	switch (params_format(params)) {
@@ -173,12 +167,9 @@ static int ad1836_hw_params(struct snd_pcm_substream *substream,
 }
 
 #ifdef CONFIG_PM
-static int ad1836_soc_suspend(struct platform_device *pdev,
+static int ad1836_soc_suspend(struct snd_soc_codec *codec,
 		pm_message_t state)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
-
 	/* reset clock control mode */
 	u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 	adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
@@ -186,11 +177,8 @@ static int ad1836_soc_suspend(struct platform_device *pdev,
 	return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 }
 
-static int ad1836_soc_resume(struct platform_device *pdev)
+static int ad1836_soc_resume(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
-
 	/* restore clock control mode */
 	u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
 	adc_ctrl2 |= AD1836_ADC_AUX;
@@ -202,49 +190,14 @@ static int ad1836_soc_resume(struct platform_device *pdev)
 #define ad1836_soc_resume  NULL
 #endif
 
-static int __devinit ad1836_spi_probe(struct spi_device *spi)
-{
-	struct snd_soc_codec *codec;
-	struct ad1836_priv *ad1836;
-
-	ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
-	if (ad1836 == NULL)
-		return -ENOMEM;
-
-	codec = &ad1836->codec;
-	codec->control_data = spi;
-	codec->dev = &spi->dev;
-
-	dev_set_drvdata(&spi->dev, ad1836);
-
-	return ad1836_register(ad1836);
-}
-
-static int __devexit ad1836_spi_remove(struct spi_device *spi)
-{
-	struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev);
-
-	ad1836_unregister(ad1836);
-	return 0;
-}
-
-static struct spi_driver ad1836_spi_driver = {
-	.driver = {
-		.name	= "ad1836",
-		.owner	= THIS_MODULE,
-	},
-	.probe		= ad1836_spi_probe,
-	.remove		= __devexit_p(ad1836_spi_remove),
-};
-
 static struct snd_soc_dai_ops ad1836_dai_ops = {
 	.hw_params = ad1836_hw_params,
 	.set_fmt = ad1836_set_dai_fmt,
 };
 
 /* codec DAI instance */
-struct snd_soc_dai ad1836_dai = {
-	.name = "AD1836",
+static struct snd_soc_dai_driver ad1836_dai = {
+	.name = "ad1836-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
@@ -263,35 +216,13 @@ struct snd_soc_dai ad1836_dai = {
 	},
 	.ops = &ad1836_dai_ops,
 };
-EXPORT_SYMBOL_GPL(ad1836_dai);
 
-static int ad1836_register(struct ad1836_priv *ad1836)
+static int ad1836_probe(struct snd_soc_codec *codec)
 {
-	int ret;
-	struct snd_soc_codec *codec = &ad1836->codec;
-
-	if (ad1836_codec) {
-		dev_err(codec->dev, "Another ad1836 is registered\n");
-		kfree(ad1836);
-		return -EINVAL;
-	}
-
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-	snd_soc_codec_set_drvdata(codec, ad1836);
-	codec->reg_cache = ad1836->reg_cache;
-	codec->reg_cache_size = AD1836_NUM_REGS;
-	codec->name = "AD1836";
-	codec->owner = THIS_MODULE;
-	codec->dai = &ad1836_dai;
-	codec->num_dai = 1;
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
-	ad1836_dai.dev = codec->dev;
-	ad1836_codec = codec;
+	struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
+	int ret = 0;
 
+	codec->control_data = ad1836->control_data;
 	ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
 	if (ret < 0) {
 		dev_err(codec->dev, "failed to set cache I/O: %d\n",
@@ -319,81 +250,69 @@ static int ad1836_register(struct ad1836_priv *ad1836)
 	snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF);
 	snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF);
 
-	ret = snd_soc_register_codec(codec);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
-		kfree(ad1836);
-		return ret;
-	}
-
-	ret = snd_soc_register_dai(&ad1836_dai);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-		snd_soc_unregister_codec(codec);
-		kfree(ad1836);
-		return ret;
-	}
-
-	return 0;
-}
-
-static void ad1836_unregister(struct ad1836_priv *ad1836)
-{
-	snd_soc_unregister_dai(&ad1836_dai);
-	snd_soc_unregister_codec(&ad1836->codec);
-	kfree(ad1836);
-	ad1836_codec = NULL;
-}
-
-static int ad1836_probe(struct platform_device *pdev)
-{
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec;
-	int ret = 0;
-
-	if (ad1836_codec == NULL) {
-		dev_err(&pdev->dev, "Codec device not registered\n");
-		return -ENODEV;
-	}
-
-	socdev->card->codec = ad1836_codec;
-	codec = ad1836_codec;
-
-	/* register pcms */
-	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-	if (ret < 0) {
-		dev_err(codec->dev, "failed to create pcms: %d\n", ret);
-		goto pcm_err;
-	}
-
 	snd_soc_add_controls(codec, ad1836_snd_controls,
 			     ARRAY_SIZE(ad1836_snd_controls));
 	snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets,
 				  ARRAY_SIZE(ad1836_dapm_widgets));
 	snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
 
-pcm_err:
 	return ret;
 }
 
 /* power down chip */
-static int ad1836_remove(struct platform_device *pdev)
+static int ad1836_remove(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-
-	snd_soc_free_pcms(socdev);
-	snd_soc_dapm_free(socdev);
+	/* reset clock control mode */
+	u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
+	adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
 
-	return 0;
+	return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
 }
 
-struct snd_soc_codec_device soc_codec_dev_ad1836 = {
+static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
 	.probe = 	ad1836_probe,
 	.remove = 	ad1836_remove,
 	.suspend =      ad1836_soc_suspend,
 	.resume =       ad1836_soc_resume,
+	.reg_cache_size = AD1836_NUM_REGS,
+	.reg_word_size = sizeof(u16),
+};
+
+static int __devinit ad1836_spi_probe(struct spi_device *spi)
+{
+	struct ad1836_priv *ad1836;
+	int ret;
+
+	ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
+	if (ad1836 == NULL)
+		return -ENOMEM;
+
+	spi_set_drvdata(spi, ad1836);
+	ad1836->control_data = spi;
+	ad1836->control_type = SND_SOC_SPI;
+
+	ret = snd_soc_register_codec(&spi->dev,
+			&soc_codec_dev_ad1836, &ad1836_dai, 1);
+	if (ret < 0)
+		kfree(ad1836);
+	return ret;
+}
+
+static int __devexit ad1836_spi_remove(struct spi_device *spi)
+{
+	snd_soc_unregister_codec(&spi->dev);
+	kfree(spi_get_drvdata(spi));
+	return 0;
+}
+
+static struct spi_driver ad1836_spi_driver = {
+	.driver = {
+		.name	= "ad1836-codec",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= ad1836_spi_probe,
+	.remove		= __devexit_p(ad1836_spi_remove),
 };
-EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836);
 
 static int __init ad1836_init(void)
 {