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, 59 insertions, 124 deletions

diff --git a/sound/soc/codecs/wm9090.c b/sound/soc/codecs/wm9090.c
index 1592250daec0..7a1825418ee4 100644
--- a/sound/soc/codecs/wm9090.c
+++ b/sound/soc/codecs/wm9090.c
@@ -34,8 +34,6 @@
 
 #include "wm9090.h"
 
-static struct snd_soc_codec *wm9090_codec;
-
 static const u16 wm9090_reg_defaults[] = {
 	0x9093,     /* R0   - Software Reset */
 	0x0006,     /* R1   - Power Management (1) */
@@ -142,15 +140,10 @@ static const u16 wm9090_reg_defaults[] = {
 
 /* This struct is used to save the context */
 struct wm9090_priv {
-	/* We're not really registering as a CODEC since ASoC core
-	 * does not yet support multiple CODECs but having the CODEC
-	 * structure means we can reuse some of the ASoC core
-	 * features.
-	 */
-	struct snd_soc_codec codec;
 	struct mutex mutex;
 	u16 reg_cache[WM9090_MAX_REGISTER + 1];
 	struct wm9090_platform_data pdata;
+	void *control_data;
 };
 
 static int wm9090_volatile(unsigned int reg)
@@ -523,7 +516,7 @@ static int wm9090_set_bias_level(struct snd_soc_codec *codec,
 	case SND_SOC_BIAS_STANDBY:
 		if (codec->bias_level == SND_SOC_BIAS_OFF) {
 			/* Restore the register cache */
-			for (i = 1; i < codec->reg_cache_size; i++) {
+			for (i = 1; i < codec->driver->reg_cache_size; i++) {
 				if (reg_cache[i] == wm9090_reg_defaults[i])
 					continue;
 				if (wm9090_volatile(i))
@@ -556,51 +549,67 @@ static int wm9090_set_bias_level(struct snd_soc_codec *codec,
 	return 0;
 }
 
-static int wm9090_probe(struct platform_device *pdev)
+static int wm9090_probe(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec;
-	int ret = 0;
+	struct wm9090_priv *wm9090 = snd_soc_codec_get_drvdata(codec);
+	int ret;
 
-	if (wm9090_codec == NULL) {
-		dev_err(&pdev->dev, "Codec device not registered\n");
-		return -ENODEV;
+	codec->control_data = wm9090->control_data;
+	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+		return ret;
 	}
 
-	socdev->card->codec = wm9090_codec;
-	codec = wm9090_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;
+	ret = snd_soc_read(codec, WM9090_SOFTWARE_RESET);
+	if (ret < 0)
+		return ret;
+	if (ret != wm9090_reg_defaults[WM9090_SOFTWARE_RESET]) {
+		dev_err(codec->dev, "Device is not a WM9090, ID=%x\n", ret);
+		return -EINVAL;
 	}
 
+	ret = snd_soc_write(codec, WM9090_SOFTWARE_RESET, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Configure some defaults; they will be written out when we
+	 * bring the bias up.
+	 */
+	wm9090->reg_cache[WM9090_IN1_LINE_INPUT_A_VOLUME] |= WM9090_IN1_VU
+		| WM9090_IN1A_ZC;
+	wm9090->reg_cache[WM9090_IN1_LINE_INPUT_B_VOLUME] |= WM9090_IN1_VU
+		| WM9090_IN1B_ZC;
+	wm9090->reg_cache[WM9090_IN2_LINE_INPUT_A_VOLUME] |= WM9090_IN2_VU
+		| WM9090_IN2A_ZC;
+	wm9090->reg_cache[WM9090_IN2_LINE_INPUT_B_VOLUME] |= WM9090_IN2_VU
+		| WM9090_IN2B_ZC;
+	wm9090->reg_cache[WM9090_SPEAKER_VOLUME_LEFT] |=
+		WM9090_SPKOUT_VU | WM9090_SPKOUTL_ZC;
+	wm9090->reg_cache[WM9090_LEFT_OUTPUT_VOLUME] |=
+		WM9090_HPOUT1_VU | WM9090_HPOUT1L_ZC;
+	wm9090->reg_cache[WM9090_RIGHT_OUTPUT_VOLUME] |=
+		WM9090_HPOUT1_VU | WM9090_HPOUT1R_ZC;
+
+	wm9090->reg_cache[WM9090_CLOCKING_1] |= WM9090_TOCLK_ENA;
+
+	wm9090_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
 	wm9090_add_controls(codec);
 
 	return 0;
-
-pcm_err:
-	return ret;
 }
 
 #ifdef CONFIG_PM
-static int wm9090_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm9090_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;
-
 	wm9090_set_bias_level(codec, SND_SOC_BIAS_OFF);
 
 	return 0;
 }
 
-static int wm9090_resume(struct platform_device *pdev)
+static int wm9090_resume(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
-
 	wm9090_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
 	return 0;
@@ -610,29 +619,29 @@ static int wm9090_resume(struct platform_device *pdev)
 #define wm9090_resume NULL
 #endif
 
-static int wm9090_remove(struct platform_device *pdev)
+static int wm9090_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);
+	wm9090_set_bias_level(codec, SND_SOC_BIAS_OFF);
 
 	return 0;
 }
 
-struct snd_soc_codec_device soc_codec_dev_wm9090 = {
+static struct snd_soc_codec_driver soc_codec_dev_wm9090 = {
 	.probe = 	wm9090_probe,
 	.remove = 	wm9090_remove,
 	.suspend = 	wm9090_suspend,
 	.resume =	wm9090_resume,
+	.set_bias_level = wm9090_set_bias_level,
+	.reg_cache_size = (WM9090_MAX_REGISTER + 1),
+	.reg_word_size = sizeof(u16),
+	.reg_cache_default = wm9090_reg_defaults,
+	.volatile_register = wm9090_volatile,
 };
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm9090);
 
 static int wm9090_i2c_probe(struct i2c_client *i2c,
 			    const struct i2c_device_id *id)
 {
 	struct wm9090_priv *wm9090;
-	struct snd_soc_codec *codec;
 	int ret;
 
 	wm9090 = kzalloc(sizeof(*wm9090), GFP_KERNEL);
@@ -640,102 +649,28 @@ static int wm9090_i2c_probe(struct i2c_client *i2c,
 		dev_err(&i2c->dev, "Can not allocate memory\n");
 		return -ENOMEM;
 	}
-	codec = &wm9090->codec;
 
 	if (i2c->dev.platform_data)
 		memcpy(&wm9090->pdata, i2c->dev.platform_data,
 		       sizeof(wm9090->pdata));
 
-	wm9090_codec = codec;
-
 	i2c_set_clientdata(i2c, wm9090);
+	wm9090->control_data = i2c;
+	mutex_init(&wm9090->mutex);
 
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
-	codec->control_data = i2c;
-	snd_soc_codec_set_drvdata(codec, wm9090);
-	codec->dev = &i2c->dev;
-	codec->name = "WM9090";
-	codec->owner = THIS_MODULE;
-	codec->bias_level = SND_SOC_BIAS_OFF;
-	codec->set_bias_level = wm9090_set_bias_level,
-	codec->reg_cache_size = WM9090_MAX_REGISTER + 1;
-	codec->reg_cache = &wm9090->reg_cache;
-	codec->volatile_register = wm9090_volatile;
-
-	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
-		goto err;
-	}
-
-	memcpy(&wm9090->reg_cache, wm9090_reg_defaults,
-	       sizeof(wm9090->reg_cache));
-
-	ret = snd_soc_read(codec, WM9090_SOFTWARE_RESET);
-	if (ret < 0)
-		goto err;
-	if (ret != wm9090_reg_defaults[WM9090_SOFTWARE_RESET]) {
-		dev_err(&i2c->dev, "Device is not a WM9090, ID=%x\n", ret);
-		ret = -EINVAL;
-		goto err;
-	}
-
-	ret = snd_soc_write(codec, WM9090_SOFTWARE_RESET, 0);
+	ret =  snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_wm9090,  NULL, 0);
 	if (ret < 0)
-		goto err;
-
-	/* Configure some defaults; they will be written out when we
-	 * bring the bias up.
-	 */
-	wm9090->reg_cache[WM9090_IN1_LINE_INPUT_A_VOLUME] |= WM9090_IN1_VU
-		| WM9090_IN1A_ZC;
-	wm9090->reg_cache[WM9090_IN1_LINE_INPUT_B_VOLUME] |= WM9090_IN1_VU
-		| WM9090_IN1B_ZC;
-	wm9090->reg_cache[WM9090_IN2_LINE_INPUT_A_VOLUME] |= WM9090_IN2_VU
-		| WM9090_IN2A_ZC;
-	wm9090->reg_cache[WM9090_IN2_LINE_INPUT_B_VOLUME] |= WM9090_IN2_VU
-		| WM9090_IN2B_ZC;
-	wm9090->reg_cache[WM9090_SPEAKER_VOLUME_LEFT] |=
-		WM9090_SPKOUT_VU | WM9090_SPKOUTL_ZC;
-	wm9090->reg_cache[WM9090_LEFT_OUTPUT_VOLUME] |= 
-		WM9090_HPOUT1_VU | WM9090_HPOUT1L_ZC;
-	wm9090->reg_cache[WM9090_RIGHT_OUTPUT_VOLUME] |=
-		WM9090_HPOUT1_VU | WM9090_HPOUT1R_ZC;
-
-	wm9090->reg_cache[WM9090_CLOCKING_1] |= WM9090_TOCLK_ENA;
-
-	wm9090_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
-	ret = snd_soc_register_codec(codec);
-	if (ret != 0) {
-		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
-		goto err_bias;
-	}
-
-	return 0;
-
-err_bias:
-	wm9090_set_bias_level(codec, SND_SOC_BIAS_OFF);
-err:
-	kfree(wm9090);
-	i2c_set_clientdata(i2c, NULL);
-	wm9090_codec = NULL;
-
+		kfree(wm9090);
 	return ret;
 }
 
 static int wm9090_i2c_remove(struct i2c_client *i2c)
 {
 	struct wm9090_priv *wm9090 = i2c_get_clientdata(i2c);
-	struct snd_soc_codec *codec = &wm9090->codec;
 
-	snd_soc_unregister_codec(codec);
-	wm9090_set_bias_level(codec, SND_SOC_BIAS_OFF);
+	snd_soc_unregister_codec(&i2c->dev);
 	kfree(wm9090);
-	wm9090_codec = NULL;
 
 	return 0;
 }
@@ -748,7 +683,7 @@ MODULE_DEVICE_TABLE(i2c, wm9090_id);
 
 static struct i2c_driver wm9090_i2c_driver = {
 	.driver = {
-		.name = "wm9090",
+		.name = "wm9090-codec",
 		.owner = THIS_MODULE,
 	},
 	.probe = wm9090_i2c_probe,