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, 68 insertions, 182 deletions

diff --git a/sound/soc/codecs/wm8971.c b/sound/soc/codecs/wm8971.c
index a99620f335d..ad2692afbb3 100644
--- a/sound/soc/codecs/wm8971.c
+++ b/sound/soc/codecs/wm8971.c
@@ -38,6 +38,8 @@ static struct workqueue_struct *wm8971_workq = NULL;
 
 /* codec private data */
 struct wm8971_priv {
+	enum snd_soc_control_type control_type;
+	void *control_data;
 	unsigned int sysclk;
 };
 
@@ -492,8 +494,7 @@ static int wm8971_pcm_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 wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
 	u16 iface = snd_soc_read(codec, WM8971_IFACE) & 0x1f3;
 	u16 srate = snd_soc_read(codec, WM8971_SRATE) & 0x1c0;
@@ -573,8 +574,8 @@ static struct snd_soc_dai_ops wm8971_dai_ops = {
 	.set_sysclk	= wm8971_set_dai_sysclk,
 };
 
-struct snd_soc_dai wm8971_dai = {
-	.name = "WM8971",
+static struct snd_soc_dai_driver wm8971_dai = {
+	.name = "wm8971-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 1,
@@ -589,7 +590,6 @@ struct snd_soc_dai wm8971_dai = {
 		.formats = WM8971_FORMATS,},
 	.ops = &wm8971_dai_ops,
 };
-EXPORT_SYMBOL_GPL(wm8971_dai);
 
 static void wm8971_work(struct work_struct *work)
 {
@@ -598,19 +598,14 @@ static void wm8971_work(struct work_struct *work)
 	wm8971_set_bias_level(codec, codec->bias_level);
 }
 
-static int wm8971_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8971_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;
-
 	wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
 	return 0;
 }
 
-static int wm8971_resume(struct platform_device *pdev)
+static int wm8971_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;
@@ -639,37 +634,27 @@ static int wm8971_resume(struct platform_device *pdev)
 	return 0;
 }
 
-static int wm8971_init(struct snd_soc_device *socdev,
-		       enum snd_soc_control_type control)
+static int wm8971_probe(struct snd_soc_codec *codec)
 {
-	struct snd_soc_codec *codec = socdev->card->codec;
-	int reg, ret = 0;
-
-	codec->name = "WM8971";
-	codec->owner = THIS_MODULE;
-	codec->set_bias_level = wm8971_set_bias_level;
-	codec->dai = &wm8971_dai;
-	codec->reg_cache_size = ARRAY_SIZE(wm8971_reg);
-	codec->num_dai = 1;
-	codec->reg_cache = kmemdup(wm8971_reg, sizeof(wm8971_reg), GFP_KERNEL);
-
-	if (codec->reg_cache == NULL)
-		return -ENOMEM;
+	struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
+	int ret = 0;
+	u16 reg;
+
+	pr_info("WM8971 Audio Codec %s", WM8971_VERSION);
 
-	ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
+	codec->control_data = wm8971->control_data;
+	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8971->control_type);
 	if (ret < 0) {
 		printk(KERN_ERR "wm8971: failed to set cache I/O: %d\n", ret);
-		goto err;
+		return ret;
 	}
 
-	wm8971_reset(codec);
+	INIT_DELAYED_WORK(&codec->delayed_work, wm8971_work);
+	wm8971_workq = create_workqueue("wm8971");
+	if (wm8971_workq == NULL)
+		return -ENOMEM;
 
-	/* register pcms */
-	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-	if (ret < 0) {
-		printk(KERN_ERR "wm8971: failed to create pcms\n");
-		goto err;
-	}
+	wm8971_reset(codec);
 
 	/* charge output caps - set vmid to 5k for quick power up */
 	reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
@@ -704,40 +689,55 @@ static int wm8971_init(struct snd_soc_device *socdev,
 	wm8971_add_widgets(codec);
 
 	return ret;
-
-err:
-	kfree(codec->reg_cache);
-	return ret;
 }
 
-/* If the i2c layer weren't so broken, we could pass this kind of data
-   around */
-static struct snd_soc_device *wm8971_socdev;
 
-#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
+/* power down chip */
+static int wm8971_remove(struct snd_soc_codec *codec)
+{
+	wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+	if (wm8971_workq)
+		destroy_workqueue(wm8971_workq);
+	return 0;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8971 = {
+	.probe =	wm8971_probe,
+	.remove =	wm8971_remove,
+	.suspend =	wm8971_suspend,
+	.resume =	wm8971_resume,
+	.set_bias_level = wm8971_set_bias_level,
+	.reg_cache_size = ARRAY_SIZE(wm8971_reg),
+	.reg_word_size = sizeof(u16),
+	.reg_cache_default = wm8971_reg,
+};
 
-static int wm8971_i2c_probe(struct i2c_client *i2c,
-			    const struct i2c_device_id *id)
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8971_i2c_probe(struct i2c_client *i2c,
+				      const struct i2c_device_id *id)
 {
-	struct snd_soc_device *socdev = wm8971_socdev;
-	struct snd_soc_codec *codec = socdev->card->codec;
+	struct wm8971_priv *wm8971;
 	int ret;
 
-	i2c_set_clientdata(i2c, codec);
+	wm8971 = kzalloc(sizeof(struct wm8971_priv), GFP_KERNEL);
+	if (wm8971 == NULL)
+		return -ENOMEM;
 
-	codec->control_data = i2c;
+	i2c_set_clientdata(i2c, wm8971);
+	wm8971->control_data = i2c;
 
-	ret = wm8971_init(socdev, SND_SOC_I2C);
+	ret = snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_wm8971, &wm8971_dai, 1);
 	if (ret < 0)
-		pr_err("failed to initialise WM8971\n");
-
+		kfree(wm8971);
 	return ret;
 }
 
-static int wm8971_i2c_remove(struct i2c_client *client)
+static __devexit int wm8971_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;
 }
 
@@ -749,148 +749,34 @@ MODULE_DEVICE_TABLE(i2c, wm8971_i2c_id);
 
 static struct i2c_driver wm8971_i2c_driver = {
 	.driver = {
-		.name = "WM8971 I2C Codec",
+		.name = "wm8971-codec",
 		.owner = THIS_MODULE,
 	},
-	.probe    = wm8971_i2c_probe,
-	.remove   = wm8971_i2c_remove,
+	.probe =    wm8971_i2c_probe,
+	.remove =   __devexit_p(wm8971_i2c_remove),
 	.id_table = wm8971_i2c_id,
 };
-
-static int wm8971_add_i2c_device(struct platform_device *pdev,
-				 const struct wm8971_setup_data *setup)
-{
-	struct i2c_board_info info;
-	struct i2c_adapter *adapter;
-	struct i2c_client *client;
-	int ret;
-
-	ret = i2c_add_driver(&wm8971_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, "wm8971", 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(&wm8971_i2c_driver);
-	return -ENODEV;
-}
-
 #endif
 
-static int wm8971_probe(struct platform_device *pdev)
+static int __init wm8971_modinit(void)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct wm8971_setup_data *setup;
-	struct snd_soc_codec *codec;
-	struct wm8971_priv *wm8971;
 	int ret = 0;
-
-	pr_info("WM8971 Audio Codec %s", WM8971_VERSION);
-
-	setup = socdev->codec_data;
-	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
-	if (codec == NULL)
-		return -ENOMEM;
-
-	wm8971 = kzalloc(sizeof(struct wm8971_priv), GFP_KERNEL);
-	if (wm8971 == NULL) {
-		kfree(codec);
-		return -ENOMEM;
-	}
-
-	snd_soc_codec_set_drvdata(codec, wm8971);
-	socdev->card->codec = codec;
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-	wm8971_socdev = socdev;
-
-	INIT_DELAYED_WORK(&codec->delayed_work, wm8971_work);
-	wm8971_workq = create_workqueue("wm8971");
-	if (wm8971_workq == NULL) {
-		kfree(snd_soc_codec_get_drvdata(codec));
-		kfree(codec);
-		return -ENOMEM;
-	}
-
-#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
-	if (setup->i2c_address) {
-		ret = wm8971_add_i2c_device(pdev, setup);
-	}
-#endif
-	/* Add other interfaces here */
-
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+	ret = i2c_add_driver(&wm8971_i2c_driver);
 	if (ret != 0) {
-		destroy_workqueue(wm8971_workq);
-		kfree(snd_soc_codec_get_drvdata(codec));
-		kfree(codec);
+		printk(KERN_ERR "Failed to register WM8971 I2C driver: %d\n",
+		       ret);
 	}
-
-	return ret;
-}
-
-/* power down chip */
-static int wm8971_remove(struct platform_device *pdev)
-{
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
-
-	if (codec->control_data)
-		wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
-	if (wm8971_workq)
-		destroy_workqueue(wm8971_workq);
-	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(&wm8971_i2c_driver);
 #endif
-	kfree(snd_soc_codec_get_drvdata(codec));
-	kfree(codec);
-
-	return 0;
-}
-
-struct snd_soc_codec_device soc_codec_dev_wm8971 = {
-	.probe = 	wm8971_probe,
-	.remove = 	wm8971_remove,
-	.suspend = 	wm8971_suspend,
-	.resume =	wm8971_resume,
-};
-
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8971);
-
-static int __init wm8971_modinit(void)
-{
-	return snd_soc_register_dai(&wm8971_dai);
+	return ret;
 }
 module_init(wm8971_modinit);
 
 static void __exit wm8971_exit(void)
 {
-	snd_soc_unregister_dai(&wm8971_dai);
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+	i2c_del_driver(&wm8971_i2c_driver);
+#endif
 }
 module_exit(wm8971_exit);