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, 47 insertions, 133 deletions

diff --git a/sound/soc/codecs/wm8523.c b/sound/soc/codecs/wm8523.c
index 0ad039b..58d411b 100644
--- a/sound/soc/codecs/wm8523.c
+++ b/sound/soc/codecs/wm8523.c
@@ -30,9 +30,6 @@
 
 #include "wm8523.h"
 
-static struct snd_soc_codec *wm8523_codec;
-struct snd_soc_codec_device soc_codec_dev_wm8523;
-
 #define WM8523_NUM_SUPPLIES 2
 static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = {
 	"AVDD",
@@ -43,7 +40,8 @@ static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = {
 
 /* codec private data */
 struct wm8523_priv {
-	struct snd_soc_codec codec;
+	enum snd_soc_control_type control_type;
+	void *control_data;
 	u16 reg_cache[WM8523_REGISTER_COUNT];
 	struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES];
 	unsigned int sysclk;
@@ -162,8 +160,7 @@ static int wm8523_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_soc_dai *dai)
 {
 	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;
 	struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
 	int i;
 	u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1);
@@ -387,8 +384,8 @@ static struct snd_soc_dai_ops wm8523_dai_ops = {
 	.set_fmt	= wm8523_set_dai_fmt,
 };
 
-struct snd_soc_dai wm8523_dai = {
-	.name = "WM8523",
+static struct snd_soc_dai_driver wm8523_dai = {
+	.name = "wm8523-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,  /* Mono modes not yet supported */
@@ -398,25 +395,17 @@ struct snd_soc_dai wm8523_dai = {
 	},
 	.ops = &wm8523_dai_ops,
 };
-EXPORT_SYMBOL_GPL(wm8523_dai);
 
 #ifdef CONFIG_PM
-static int wm8523_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8523_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;
-
 	wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF);
 	return 0;
 }
 
-static int wm8523_resume(struct platform_device *pdev)
+static int wm8523_resume(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
-
 	wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
 	return 0;
 }
 #else
@@ -424,93 +413,21 @@ static int wm8523_resume(struct platform_device *pdev)
 #define wm8523_resume NULL
 #endif
 
-static int wm8523_probe(struct platform_device *pdev)
-{
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec;
-	int ret = 0;
-
-	if (wm8523_codec == NULL) {
-		dev_err(&pdev->dev, "Codec device not registered\n");
-		return -ENODEV;
-	}
-
-	socdev->card->codec = wm8523_codec;
-	codec = wm8523_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, wm8523_snd_controls,
-			     ARRAY_SIZE(wm8523_snd_controls));
-	wm8523_add_widgets(codec);
-
-	return ret;
-
-pcm_err:
-	return ret;
-}
-
-static int wm8523_remove(struct platform_device *pdev)
-{
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-
-	snd_soc_free_pcms(socdev);
-	snd_soc_dapm_free(socdev);
-
-	return 0;
-}
-
-struct snd_soc_codec_device soc_codec_dev_wm8523 = {
-	.probe = 	wm8523_probe,
-	.remove = 	wm8523_remove,
-	.suspend = 	wm8523_suspend,
-	.resume =	wm8523_resume,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8523);
-
-static int wm8523_register(struct wm8523_priv *wm8523,
-			   enum snd_soc_control_type control)
+static int wm8523_probe(struct snd_soc_codec *codec)
 {
-	int ret;
-	struct snd_soc_codec *codec = &wm8523->codec;
-	int i;
-
-	if (wm8523_codec) {
-		dev_err(codec->dev, "Another WM8523 is registered\n");
-		ret = -EINVAL;
-		goto err;
-	}
-
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
-	snd_soc_codec_set_drvdata(codec, wm8523);
-	codec->name = "WM8523";
-	codec->owner = THIS_MODULE;
-	codec->bias_level = SND_SOC_BIAS_OFF;
-	codec->set_bias_level = wm8523_set_bias_level;
-	codec->dai = &wm8523_dai;
-	codec->num_dai = 1;
-	codec->reg_cache_size = WM8523_REGISTER_COUNT;
-	codec->reg_cache = &wm8523->reg_cache;
-	codec->volatile_register = wm8523_volatile_register;
+	struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
+	int ret, i;
 
+	codec->hw_write = (hw_write_t)i2c_master_send;
+	codec->control_data = wm8523->control_data;
 	wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0];
 	wm8523->rate_constraint.count =
 		ARRAY_SIZE(wm8523->rate_constraint_list);
 
-	memcpy(codec->reg_cache, wm8523_reg, sizeof(wm8523_reg));
-
-	ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
+	ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8523->control_type);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
-		goto err;
+		return ret;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++)
@@ -520,7 +437,7 @@ static int wm8523_register(struct wm8523_priv *wm8523,
 				 wm8523->supplies);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
-		goto err;
+		return ret;
 	}
 
 	ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
@@ -555,8 +472,6 @@ static int wm8523_register(struct wm8523_priv *wm8523,
 		goto err_enable;
 	}
 
-	wm8523_dai.dev = codec->dev;
-
 	/* Change some default settings - latch VU and enable ZC */
 	wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU;
 	wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC;
@@ -566,69 +481,68 @@ static int wm8523_register(struct wm8523_priv *wm8523,
 	/* Bias level configuration will have done an extra enable */
 	regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
 
-	wm8523_codec = codec;
-
-	ret = snd_soc_register_codec(codec);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
-		goto err_enable;
-	}
-
-	ret = snd_soc_register_dai(&wm8523_dai);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-		goto err_codec;
-	}
+	snd_soc_add_controls(codec, wm8523_snd_controls,
+			     ARRAY_SIZE(wm8523_snd_controls));
+	wm8523_add_widgets(codec);
 
 	return 0;
 
-err_codec:
-	snd_soc_unregister_codec(codec);
 err_enable:
 	regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
 err_get:
 	regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
-err:
-	kfree(wm8523);
+
 	return ret;
 }
 
-static void wm8523_unregister(struct wm8523_priv *wm8523)
+static int wm8523_remove(struct snd_soc_codec *codec)
 {
-	wm8523_set_bias_level(&wm8523->codec, SND_SOC_BIAS_OFF);
+	struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
+
+	wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF);
 	regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
-	snd_soc_unregister_dai(&wm8523_dai);
-	snd_soc_unregister_codec(&wm8523->codec);
-	kfree(wm8523);
-	wm8523_codec = NULL;
+	return 0;
 }
 
+static struct snd_soc_codec_driver soc_codec_dev_wm8523 = {
+	.probe =	wm8523_probe,
+	.remove =	wm8523_remove,
+	.suspend =	wm8523_suspend,
+	.resume =	wm8523_resume,
+	.set_bias_level = wm8523_set_bias_level,
+	.reg_cache_size = WM8523_REGISTER_COUNT,
+	.reg_word_size = sizeof(u16),
+	.reg_cache_default = wm8523_reg,
+	.volatile_register = wm8523_volatile_register,
+};
+
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 static __devinit int wm8523_i2c_probe(struct i2c_client *i2c,
 				      const struct i2c_device_id *id)
 {
 	struct wm8523_priv *wm8523;
-	struct snd_soc_codec *codec;
+	int ret;
 
 	wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL);
 	if (wm8523 == NULL)
 		return -ENOMEM;
 
-	codec = &wm8523->codec;
-	codec->hw_write = (hw_write_t)i2c_master_send;
-
 	i2c_set_clientdata(i2c, wm8523);
-	codec->control_data = i2c;
+	wm8523->control_data = i2c;
+	wm8523->control_type = SND_SOC_I2C;
 
-	codec->dev = &i2c->dev;
+	ret =  snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_wm8523, &wm8523_dai, 1);
+	if (ret < 0)
+		kfree(wm8523);
+	return ret;
 
-	return wm8523_register(wm8523, SND_SOC_I2C);
 }
 
 static __devexit int wm8523_i2c_remove(struct i2c_client *client)
 {
-	struct wm8523_priv *wm8523 = i2c_get_clientdata(client);
-	wm8523_unregister(wm8523);
+	snd_soc_unregister_codec(&client->dev);
+	kfree(i2c_get_clientdata(client));
 	return 0;
 }
 
@@ -640,7 +554,7 @@ MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id);
 
 static struct i2c_driver wm8523_i2c_driver = {
 	.driver = {
-		.name = "WM8523",
+		.name = "wm8523-codec",
 		.owner = THIS_MODULE,
 	},
 	.probe =    wm8523_i2c_probe,