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, 160 deletions

diff --git a/sound/soc/codecs/ssm2602.c b/sound/soc/codecs/ssm2602.c
index b47ed4f..67d8c04 100644
--- a/sound/soc/codecs/ssm2602.c
+++ b/sound/soc/codecs/ssm2602.c
@@ -45,11 +45,11 @@
 
 #define SSM2602_VERSION "0.1"
 
-struct snd_soc_codec_device soc_codec_dev_ssm2602;
-
 /* codec private data */
 struct ssm2602_priv {
 	unsigned int sysclk;
+	enum snd_soc_control_type control_type;
+	void *control_data;
 	struct snd_pcm_substream *master_substream;
 	struct snd_pcm_substream *slave_substream;
 };
@@ -276,8 +276,7 @@ static int ssm2602_hw_params(struct snd_pcm_substream *substream,
 {
 	u16 srate;
 	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 ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 	struct i2c_client *i2c = codec->control_data;
 	u16 iface = ssm2602_read_reg_cache(codec, SSM2602_IFACE) & 0xfff3;
@@ -321,8 +320,7 @@ static int ssm2602_startup(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 ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 	struct i2c_client *i2c = codec->control_data;
 	struct snd_pcm_runtime *master_runtime;
@@ -360,8 +358,7 @@ static int ssm2602_pcm_prepare(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;
 	/* set active */
 	ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 
@@ -372,8 +369,7 @@ static void ssm2602_shutdown(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 ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 
 	/* deactivate */
@@ -518,8 +514,8 @@ static struct snd_soc_dai_ops ssm2602_dai_ops = {
 	.set_fmt	= ssm2602_set_dai_fmt,
 };
 
-struct snd_soc_dai ssm2602_dai = {
-	.name = "SSM2602",
+static struct snd_soc_dai_driver ssm2602_dai = {
+	.name = "ssm2602-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
@@ -534,21 +530,15 @@ struct snd_soc_dai ssm2602_dai = {
 		.formats = SSM2602_FORMATS,},
 	.ops = &ssm2602_dai_ops,
 };
-EXPORT_SYMBOL_GPL(ssm2602_dai);
 
-static int ssm2602_suspend(struct platform_device *pdev, pm_message_t state)
+static int ssm2602_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;
-
 	ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 	return 0;
 }
 
-static int ssm2602_resume(struct platform_device *pdev)
+static int ssm2602_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;
 	u8 data[2];
 	u16 *cache = codec->reg_cache;
@@ -563,36 +553,18 @@ static int ssm2602_resume(struct platform_device *pdev)
 	return 0;
 }
 
-/*
- * initialise the ssm2602 driver
- * register the mixer and dsp interfaces with the kernel
- */
-static int ssm2602_init(struct snd_soc_device *socdev)
+static int ssm2602_probe(struct snd_soc_codec *codec)
 {
-	struct snd_soc_codec *codec = socdev->card->codec;
-	int reg, ret = 0;
-
-	codec->name = "SSM2602";
-	codec->owner = THIS_MODULE;
-	codec->read = ssm2602_read_reg_cache;
-	codec->write = ssm2602_write;
-	codec->set_bias_level = ssm2602_set_bias_level;
-	codec->dai = &ssm2602_dai;
-	codec->num_dai = 1;
-	codec->reg_cache_size = sizeof(ssm2602_reg);
-	codec->reg_cache = kmemdup(ssm2602_reg, sizeof(ssm2602_reg),
-					GFP_KERNEL);
-	if (codec->reg_cache == NULL)
-		return -ENOMEM;
+	struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
+	int ret = 0, reg;
+
+	pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
+
+	codec->bias_level = SND_SOC_BIAS_OFF,
+	codec->control_data = ssm2602->control_data;
 
 	ssm2602_reset(codec);
 
-	/* register pcms */
-	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-	if (ret < 0) {
-		pr_err("ssm2602: failed to create pcms\n");
-		goto pcm_err;
-	}
 	/*power on device*/
 	ssm2602_write(codec, SSM2602_ACTIVE, 0);
 	/* set the update bits */
@@ -614,13 +586,27 @@ static int ssm2602_init(struct snd_soc_device *socdev)
 	ssm2602_add_widgets(codec);
 
 	return ret;
+}
 
-pcm_err:
-	kfree(codec->reg_cache);
-	return ret;
+/* remove everything here */
+static int ssm2602_remove(struct snd_soc_codec *codec)
+{
+	ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
+	return 0;
 }
 
-static struct snd_soc_device *ssm2602_socdev;
+static struct snd_soc_codec_driver soc_codec_dev_ssm2602 = {
+	.probe =	ssm2602_probe,
+	.remove =	ssm2602_remove,
+	.suspend =	ssm2602_suspend,
+	.resume =	ssm2602_resume,
+	.read = ssm2602_read_reg_cache,
+	.write = ssm2602_write,
+	.set_bias_level = ssm2602_set_bias_level,
+	.reg_cache_size = sizeof(ssm2602_reg),
+	.reg_word_size = sizeof(u16),
+	.reg_cache_default = ssm2602_reg,
+};
 
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 /*
@@ -632,24 +618,28 @@ static struct snd_soc_device *ssm2602_socdev;
 static int ssm2602_i2c_probe(struct i2c_client *i2c,
 			     const struct i2c_device_id *id)
 {
-	struct snd_soc_device *socdev = ssm2602_socdev;
-	struct snd_soc_codec *codec = socdev->card->codec;
+	struct ssm2602_priv *ssm2602;
 	int ret;
 
-	i2c_set_clientdata(i2c, codec);
-	codec->control_data = i2c;
+	ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
+	if (ssm2602 == NULL)
+		return -ENOMEM;
 
-	ret = ssm2602_init(socdev);
-	if (ret < 0)
-		pr_err("failed to initialise SSM2602\n");
+	i2c_set_clientdata(i2c, ssm2602);
+	ssm2602->control_data = i2c;
+	ssm2602->control_type = SND_SOC_I2C;
 
+	ret = snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_ssm2602, &ssm2602_dai, 1);
+	if (ret < 0)
+		kfree(ssm2602);
 	return ret;
 }
 
 static int ssm2602_i2c_remove(struct i2c_client *client)
 {
-	struct snd_soc_codec *codec = i2c_get_clientdata(client);
-	kfree(codec->reg_cache);
+	snd_soc_unregister_codec(&client->dev);
+	kfree(i2c_get_clientdata(client));
 	return 0;
 }
 
@@ -658,130 +648,39 @@ static const struct i2c_device_id ssm2602_i2c_id[] = {
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
+
 /* corgi i2c codec control layer */
 static struct i2c_driver ssm2602_i2c_driver = {
 	.driver = {
-		.name = "SSM2602 I2C Codec",
+		.name = "ssm2602-codec",
 		.owner = THIS_MODULE,
 	},
 	.probe = ssm2602_i2c_probe,
 	.remove = ssm2602_i2c_remove,
 	.id_table = ssm2602_i2c_id,
 };
-
-static int ssm2602_add_i2c_device(struct platform_device *pdev,
-				  const struct ssm2602_setup_data *setup)
-{
-	struct i2c_board_info info;
-	struct i2c_adapter *adapter;
-	struct i2c_client *client;
-	int ret;
-
-	ret = i2c_add_driver(&ssm2602_i2c_driver);
-	if (ret != 0) {
-		dev_err(&pdev->dev, "can't add i2c driver\n");
-		return ret;
-	}
-	memset(&info, 0, sizeof(struct i2c_board_info));
-	info.addr = setup->i2c_address;
-	strlcpy(info.type, "ssm2602", I2C_NAME_SIZE);
-	adapter = i2c_get_adapter(setup->i2c_bus);
-	if (!adapter) {
-		dev_err(&pdev->dev, "can't get i2c adapter %d\n",
-		setup->i2c_bus);
-		goto err_driver;
-	}
-	client = i2c_new_device(adapter, &info);
-	i2c_put_adapter(adapter);
-	if (!client) {
-		dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
-		(unsigned int)info.addr);
-		goto err_driver;
-	}
-	return 0;
-err_driver:
-	i2c_del_driver(&ssm2602_i2c_driver);
-	return -ENODEV;
-}
 #endif
 
-static int ssm2602_probe(struct platform_device *pdev)
+
+static int __init ssm2602_modinit(void)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct ssm2602_setup_data *setup;
-	struct snd_soc_codec *codec;
-	struct ssm2602_priv *ssm2602;
 	int ret = 0;
-
-	pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
-
-	setup = socdev->codec_data;
-	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
-	if (codec == NULL)
-		return -ENOMEM;
-
-	ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
-	if (ssm2602 == NULL) {
-		kfree(codec);
-		return -ENOMEM;
-	}
-
-	snd_soc_codec_set_drvdata(codec, ssm2602);
-	socdev->card->codec = codec;
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
-	ssm2602_socdev = socdev;
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
-	if (setup->i2c_address) {
-		codec->hw_write = (hw_write_t)i2c_master_send;
-		ret = ssm2602_add_i2c_device(pdev, setup);
+	ret = i2c_add_driver(&ssm2602_i2c_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register SSM2602 I2C driver: %d\n",
+		       ret);
 	}
-#else
-	/* other interfaces */
 #endif
 	return ret;
 }
+module_init(ssm2602_modinit);
 
-/* remove everything here */
-static int ssm2602_remove(struct platform_device *pdev)
+static void __exit ssm2602_exit(void)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
-
-	if (codec->control_data)
-		ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
-
-	snd_soc_free_pcms(socdev);
-	snd_soc_dapm_free(socdev);
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
-	i2c_unregister_device(codec->control_data);
 	i2c_del_driver(&ssm2602_i2c_driver);
 #endif
-	kfree(snd_soc_codec_get_drvdata(codec));
-	kfree(codec);
-
-	return 0;
-}
-
-struct snd_soc_codec_device soc_codec_dev_ssm2602 = {
-	.probe = 	ssm2602_probe,
-	.remove = 	ssm2602_remove,
-	.suspend = 	ssm2602_suspend,
-	.resume =	ssm2602_resume,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602);
-
-static int __init ssm2602_modinit(void)
-{
-	return snd_soc_register_dai(&ssm2602_dai);
-}
-module_init(ssm2602_modinit);
-
-static void __exit ssm2602_exit(void)
-{
-	snd_soc_unregister_dai(&ssm2602_dai);
 }
 module_exit(ssm2602_exit);