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, 84 insertions, 185 deletions

diff --git a/sound/soc/codecs/wm8750.c b/sound/soc/codecs/wm8750.c
index e2c05e3e323..89863a5bc83 100644
--- a/sound/soc/codecs/wm8750.c
+++ b/sound/soc/codecs/wm8750.c
@@ -52,7 +52,8 @@ static const u16 wm8750_reg[] = {
 /* codec private data */
 struct wm8750_priv {
 	unsigned int sysclk;
-	struct snd_soc_codec codec;
+	enum snd_soc_control_type control_type;
+	void *control_data;
 	u16 reg_cache[ARRAY_SIZE(wm8750_reg)];
 };
 
@@ -560,8 +561,7 @@ static int wm8750_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 wm8750_priv *wm8750 = snd_soc_codec_get_drvdata(codec);
 	u16 iface = snd_soc_read(codec, WM8750_IFACE) & 0x1f3;
 	u16 srate = snd_soc_read(codec, WM8750_SRATE) & 0x1c0;
@@ -649,8 +649,8 @@ static struct snd_soc_dai_ops wm8750_dai_ops = {
 	.set_sysclk	= wm8750_set_dai_sysclk,
 };
 
-struct snd_soc_dai wm8750_dai = {
-	.name = "WM8750",
+static struct snd_soc_dai_driver wm8750_dai = {
+	.name = "wm8750-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 1,
@@ -665,21 +665,15 @@ struct snd_soc_dai wm8750_dai = {
 		.formats = WM8750_FORMATS,},
 	.ops = &wm8750_dai_ops,
 };
-EXPORT_SYMBOL_GPL(wm8750_dai);
 
-static int wm8750_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8750_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;
-
 	wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
 	return 0;
 }
 
-static int wm8750_resume(struct platform_device *pdev)
+static int wm8750_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;
@@ -698,100 +692,22 @@ static int wm8750_resume(struct platform_device *pdev)
 	return 0;
 }
 
-static struct snd_soc_codec *wm8750_codec;
-
-static int wm8750_probe(struct platform_device *pdev)
+static int wm8750_probe(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec;
-	int ret = 0;
-
-	if (!wm8750_codec) {
-		dev_err(&pdev->dev, "WM8750 codec not yet registered\n");
-		return -EINVAL;
-	}
-
-	socdev->card->codec = wm8750_codec;
-	codec = wm8750_codec;
-
-	/* register pcms */
-	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-	if (ret < 0) {
-		printk(KERN_ERR "wm8750: failed to create pcms\n");
-		goto err;
-	}
-
-	snd_soc_add_controls(codec, wm8750_snd_controls,
-				ARRAY_SIZE(wm8750_snd_controls));
-	wm8750_add_widgets(codec);
-
-	return 0;
-
-err:
-	return ret;
-}
-
-/* power down chip */
-static int wm8750_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_wm8750 = {
-	.probe		= wm8750_probe,
-	.remove		= wm8750_remove,
-	.suspend	= wm8750_suspend,
-	.resume		= wm8750_resume,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8750);
-
-/*
- * initialise the WM8750 driver
- * register the mixer and dsp interfaces with the kernel
- */
-static int wm8750_register(struct wm8750_priv *wm8750,
-			enum snd_soc_control_type control)
-{
-	struct snd_soc_codec *codec = &wm8750->codec;
-	int reg, ret = 0;
-
-	if (wm8750_codec) {
-		dev_err(codec->dev, "Multiple WM8750 devices not supported\n");
-		ret = -EINVAL;
-		goto err;
-	}
-
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
-	codec->name = "WM8750";
-	codec->owner = THIS_MODULE;
-	codec->bias_level = SND_SOC_BIAS_STANDBY;
-	codec->set_bias_level = wm8750_set_bias_level;
-	codec->dai = &wm8750_dai;
-	codec->num_dai = 1;
-	codec->reg_cache_size = ARRAY_SIZE(wm8750->reg_cache) + 1;
-	codec->reg_cache = &wm8750->reg_cache;
-	snd_soc_codec_set_drvdata(codec, wm8750);
-
-	memcpy(codec->reg_cache, wm8750_reg, sizeof(wm8750->reg_cache));
+	struct wm8750_priv *wm8750 = snd_soc_codec_get_drvdata(codec);
+	int reg, ret;
 
-	ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
+	codec->control_data = wm8750->control_data;
+	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8750->control_type);
 	if (ret < 0) {
 		printk(KERN_ERR "wm8750: failed to set cache I/O: %d\n", ret);
-		goto err;
+		return ret;
 	}
 
 	ret = wm8750_reset(codec);
 	if (ret < 0) {
 		printk(KERN_ERR "wm8750: failed to reset: %d\n", ret);
-		goto err;
+		return ret;
 	}
 
 	/* charge output caps */
@@ -815,150 +731,133 @@ static int wm8750_register(struct wm8750_priv *wm8750,
 	reg = snd_soc_read(codec, WM8750_RINVOL);
 	snd_soc_write(codec, WM8750_RINVOL, reg | 0x0100);
 
-	wm8750_codec = codec;
-
-	ret = snd_soc_register_codec(codec);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
-		goto err;
-	}
-
-	ret = snd_soc_register_dais(&wm8750_dai, 1);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
-		goto err_codec;
-	}
-
-	return 0;
-
-err_codec:
-	snd_soc_unregister_codec(codec);
-err:
-	kfree(wm8750);
+	snd_soc_add_controls(codec, wm8750_snd_controls,
+				ARRAY_SIZE(wm8750_snd_controls));
+	wm8750_add_widgets(codec);
 	return ret;
 }
 
-static void wm8750_unregister(struct wm8750_priv *wm8750)
+static int wm8750_remove(struct snd_soc_codec *codec)
 {
-	wm8750_set_bias_level(&wm8750->codec, SND_SOC_BIAS_OFF);
-	snd_soc_unregister_dais(&wm8750_dai, 1);
-	snd_soc_unregister_codec(&wm8750->codec);
-	kfree(wm8750);
-	wm8750_codec = NULL;
+	wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
+	return 0;
 }
 
-#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
-
-/*
- * WM8750 2 wire address is determined by GPIO5
- * state during powerup.
- *    low  = 0x1a
- *    high = 0x1b
- */
+static struct snd_soc_codec_driver soc_codec_dev_wm8750 = {
+	.probe =	wm8750_probe,
+	.remove =	wm8750_remove,
+	.suspend =	wm8750_suspend,
+	.resume =	wm8750_resume,
+	.set_bias_level = wm8750_set_bias_level,
+	.reg_cache_size = sizeof(wm8750_reg),
+	.reg_word_size = sizeof(u16),
+	.reg_cache_default = wm8750_reg,
+};
 
-static int wm8750_i2c_probe(struct i2c_client *i2c,
-			    const struct i2c_device_id *id)
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8750_spi_probe(struct spi_device *spi)
 {
-	struct snd_soc_codec *codec;
 	struct wm8750_priv *wm8750;
+	int ret;
 
 	wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
 	if (wm8750 == NULL)
 		return -ENOMEM;
 
-	codec = &wm8750->codec;
-	codec->control_data = i2c;
-	i2c_set_clientdata(i2c, wm8750);
-
-	codec->dev = &i2c->dev;
+	wm8750->control_data = spi;
+	wm8750->control_type = SND_SOC_SPI;
+	spi_set_drvdata(spi, wm8750);
 
-	return wm8750_register(wm8750, SND_SOC_I2C);
+	ret = snd_soc_register_codec(&spi->dev,
+			&soc_codec_dev_wm8750, &wm8750_dai, 1);
+	if (ret < 0)
+		kfree(wm8750);
+	return ret;
 }
 
-static int wm8750_i2c_remove(struct i2c_client *client)
+static int __devexit wm8750_spi_remove(struct spi_device *spi)
 {
-	struct wm8750_priv *wm8750 = i2c_get_clientdata(client);
-	wm8750_unregister(wm8750);
+	snd_soc_unregister_codec(&spi->dev);
+	kfree(spi_get_drvdata(spi));
 	return 0;
 }
 
-static const struct i2c_device_id wm8750_i2c_id[] = {
-	{ "wm8750", 0 },
-	{ "wm8987", 0 }, /* WM8987 is register compatible with WM8750 */
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, wm8750_i2c_id);
-
-static struct i2c_driver wm8750_i2c_driver = {
+static struct spi_driver wm8750_spi_driver = {
 	.driver = {
-		.name = "WM8750 I2C Codec",
-		.owner = THIS_MODULE,
+		.name	= "wm8750-codec",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
 	},
-	.probe =    wm8750_i2c_probe,
-	.remove =   wm8750_i2c_remove,
-	.id_table = wm8750_i2c_id,
+	.probe		= wm8750_spi_probe,
+	.remove		= __devexit_p(wm8750_spi_remove),
 };
-#endif
+#endif /* CONFIG_SPI_MASTER */
 
-#if defined(CONFIG_SPI_MASTER)
-static int __devinit wm8750_spi_probe(struct spi_device *spi)
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8750_i2c_probe(struct i2c_client *i2c,
+				      const struct i2c_device_id *id)
 {
-	struct snd_soc_codec *codec;
 	struct wm8750_priv *wm8750;
+	int ret;
 
 	wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
 	if (wm8750 == NULL)
 		return -ENOMEM;
 
-	codec = &wm8750->codec;
-	codec->control_data = spi;
-	codec->dev = &spi->dev;
-
-	dev_set_drvdata(&spi->dev, wm8750);
+	i2c_set_clientdata(i2c, wm8750);
+	wm8750->control_data = i2c;
+	wm8750->control_type = SND_SOC_I2C;
 
-	return wm8750_register(wm8750, SND_SOC_SPI);
+	ret =  snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_wm8750, &wm8750_dai, 1);
+	if (ret < 0)
+		kfree(wm8750);
+	return ret;
 }
 
-static int __devexit wm8750_spi_remove(struct spi_device *spi)
+static __devexit int wm8750_i2c_remove(struct i2c_client *client)
 {
-	struct wm8750_priv *wm8750 = dev_get_drvdata(&spi->dev);
-	wm8750_unregister(wm8750);
+	snd_soc_unregister_codec(&client->dev);
+	kfree(i2c_get_clientdata(client));
 	return 0;
 }
 
-static const struct spi_device_id wm8750_spi_id[] = {
+static const struct i2c_device_id wm8750_i2c_id[] = {
 	{ "wm8750", 0 },
 	{ "wm8987", 0 },
 	{ }
 };
-MODULE_DEVICE_TABLE(spi, wm8750_spi_id);
+MODULE_DEVICE_TABLE(i2c, wm8750_i2c_id);
 
-static struct spi_driver wm8750_spi_driver = {
+static struct i2c_driver wm8750_i2c_driver = {
 	.driver = {
-		.name	= "WM8750 SPI Codec",
-		.bus	= &spi_bus_type,
-		.owner	= THIS_MODULE,
+		.name = "wm8750-codec",
+		.owner = THIS_MODULE,
 	},
-	.probe		= wm8750_spi_probe,
-	.remove		= __devexit_p(wm8750_spi_remove),
-	.id_table	= wm8750_spi_id,
+	.probe =    wm8750_i2c_probe,
+	.remove =   __devexit_p(wm8750_i2c_remove),
+	.id_table = wm8750_i2c_id,
 };
 #endif
 
 static int __init wm8750_modinit(void)
 {
-	int ret;
+	int ret = 0;
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 	ret = i2c_add_driver(&wm8750_i2c_driver);
-	if (ret != 0)
-		pr_err("Failed to register WM8750 I2C driver: %d\n", ret);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register wm8750 I2C driver: %d\n",
+		       ret);
+	}
 #endif
 #if defined(CONFIG_SPI_MASTER)
 	ret = spi_register_driver(&wm8750_spi_driver);
-	if (ret != 0)
-		pr_err("Failed to register WM8750 SPI driver: %d\n", ret);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register wm8750 SPI driver: %d\n",
+		       ret);
+	}
 #endif
-	return 0;
+	return ret;
 }
 module_init(wm8750_modinit);