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, 50 insertions, 66 deletions

diff --git a/sound/soc/codecs/wm9705.c b/sound/soc/codecs/wm9705.c
index 8793341849d1..e4d8f5339c51 100644
--- a/sound/soc/codecs/wm9705.c
+++ b/sound/soc/codecs/wm9705.c
@@ -248,8 +248,7 @@ static int ac97_prepare(struct snd_pcm_substream *substream,
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	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;
 	int reg;
 	u16 vra;
 
@@ -273,9 +272,9 @@ static struct snd_soc_dai_ops wm9705_dai_ops = {
 	.prepare	= ac97_prepare,
 };
 
-struct snd_soc_dai wm9705_dai[] = {
+static struct snd_soc_dai_driver wm9705_dai[] = {
 	{
-		.name = "AC97 HiFi",
+		.name = "wm9705-hifi",
 		.ac97_control = 1,
 		.playback = {
 			.stream_name = "HiFi Playback",
@@ -294,7 +293,7 @@ struct snd_soc_dai wm9705_dai[] = {
 		.ops = &wm9705_dai_ops,
 	},
 	{
-		.name = "AC97 Aux",
+		.name = "wm9705-aux",
 		.playback = {
 			.stream_name = "Aux Playback",
 			.channels_min = 1,
@@ -304,7 +303,6 @@ struct snd_soc_dai wm9705_dai[] = {
 		},
 	}
 };
-EXPORT_SYMBOL_GPL(wm9705_dai);
 
 static int wm9705_reset(struct snd_soc_codec *codec)
 {
@@ -318,20 +316,15 @@ static int wm9705_reset(struct snd_soc_codec *codec)
 }
 
 #ifdef CONFIG_PM
-static int wm9705_soc_suspend(struct platform_device *pdev, pm_message_t msg)
+static int wm9705_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
-
 	soc_ac97_ops.write(codec->ac97, AC97_POWERDOWN, 0xffff);
 
 	return 0;
 }
 
-static int wm9705_soc_resume(struct platform_device *pdev)
+static int wm9705_soc_resume(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
 	int i, ret;
 	u16 *cache = codec->reg_cache;
 
@@ -352,49 +345,18 @@ static int wm9705_soc_resume(struct platform_device *pdev)
 #define wm9705_soc_resume NULL
 #endif
 
-static int wm9705_soc_probe(struct platform_device *pdev)
+static int wm9705_soc_probe(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec;
 	int ret = 0;
 
 	printk(KERN_INFO "WM9705 SoC Audio Codec\n");
 
-	socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec),
-				      GFP_KERNEL);
-	if (socdev->card->codec == NULL)
-		return -ENOMEM;
-	codec = socdev->card->codec;
-	mutex_init(&codec->mutex);
-
-	codec->reg_cache = kmemdup(wm9705_reg, sizeof(wm9705_reg), GFP_KERNEL);
-	if (codec->reg_cache == NULL) {
-		ret = -ENOMEM;
-		goto cache_err;
-	}
-	codec->reg_cache_size = sizeof(wm9705_reg);
-	codec->reg_cache_step = 2;
-
-	codec->name = "WM9705";
-	codec->owner = THIS_MODULE;
-	codec->dai = wm9705_dai;
-	codec->num_dai = ARRAY_SIZE(wm9705_dai);
-	codec->write = ac97_write;
-	codec->read = ac97_read;
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
 	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
 	if (ret < 0) {
 		printk(KERN_ERR "wm9705: failed to register AC97 codec\n");
-		goto codec_err;
+		return ret;
 	}
 
-	/* register pcms */
-	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-	if (ret < 0)
-		goto pcm_err;
-
 	ret = wm9705_reset(codec);
 	if (ret)
 		goto reset_err;
@@ -406,40 +368,62 @@ static int wm9705_soc_probe(struct platform_device *pdev)
 	return 0;
 
 reset_err:
-	snd_soc_free_pcms(socdev);
-pcm_err:
 	snd_soc_free_ac97_codec(codec);
-codec_err:
-	kfree(codec->reg_cache);
-cache_err:
-	kfree(socdev->card->codec);
-	socdev->card->codec = NULL;
 	return ret;
 }
 
-static int wm9705_soc_remove(struct platform_device *pdev)
+static int wm9705_soc_remove(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
-
-	if (codec == NULL)
-		return 0;
-
-	snd_soc_dapm_free(socdev);
-	snd_soc_free_pcms(socdev);
 	snd_soc_free_ac97_codec(codec);
-	kfree(codec->reg_cache);
-	kfree(codec);
 	return 0;
 }
 
-struct snd_soc_codec_device soc_codec_dev_wm9705 = {
+static struct snd_soc_codec_driver soc_codec_dev_wm9705 = {
 	.probe = 	wm9705_soc_probe,
 	.remove = 	wm9705_soc_remove,
 	.suspend =	wm9705_soc_suspend,
 	.resume =	wm9705_soc_resume,
+	.read = ac97_read,
+	.write = ac97_write,
+	.reg_cache_size = sizeof(wm9705_reg),
+	.reg_word_size = sizeof(u16),
+	.reg_cache_step = 2,
+	.reg_cache_default = wm9705_reg,
+};
+
+static __devinit int wm9705_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_codec(&pdev->dev,
+			&soc_codec_dev_wm9705, wm9705_dai, ARRAY_SIZE(wm9705_dai));
+}
+
+static int __devexit wm9705_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_codec(&pdev->dev);
+	return 0;
+}
+
+static struct platform_driver wm9705_codec_driver = {
+	.driver = {
+			.name = "wm9705-codec",
+			.owner = THIS_MODULE,
+	},
+
+	.probe = wm9705_probe,
+	.remove = __devexit_p(wm9705_remove),
 };
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm9705);
+
+static int __init wm9705_init(void)
+{
+	return platform_driver_register(&wm9705_codec_driver);
+}
+module_init(wm9705_init);
+
+static void __exit wm9705_exit(void)
+{
+	platform_driver_unregister(&wm9705_codec_driver);
+}
+module_exit(wm9705_exit);
 
 MODULE_DESCRIPTION("ASoC WM9705 driver");
 MODULE_AUTHOR("Ian Molton");