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, 122 insertions, 129 deletions

diff --git a/sound/soc/codecs/wm8900.c b/sound/soc/codecs/wm8900.c
index 5da17a704e5..33c3b57f3f6 100644
--- a/sound/soc/codecs/wm8900.c
+++ b/sound/soc/codecs/wm8900.c
@@ -23,6 +23,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
+#include <linux/spi/spi.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <sound/core.h>
@@ -137,11 +138,9 @@
 
 #define WM8900_LRC_MASK 0xfc00
 
-struct snd_soc_codec_device soc_codec_dev_wm8900;
-
 struct wm8900_priv {
-	struct snd_soc_codec codec;
-
+	enum snd_soc_control_type control_type;
+	void *control_data;
 	u16 reg_cache[WM8900_MAXREG];
 
 	u32 fll_in; /* FLL input frequency */
@@ -627,8 +626,7 @@ static int wm8900_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;
 	u16 reg;
 
 	reg = snd_soc_read(codec, WM8900_REG_AUDIO1) & ~0x60;
@@ -1015,8 +1013,8 @@ static struct snd_soc_dai_ops wm8900_dai_ops = {
 	.digital_mute	= wm8900_digital_mute,
 };
 
-struct snd_soc_dai wm8900_dai = {
-	.name = "WM8900 HiFi",
+static struct snd_soc_dai_driver wm8900_dai = {
+	.name = "wm8900-hifi",
 	.playback = {
 		.stream_name = "HiFi Playback",
 		.channels_min = 1,
@@ -1033,7 +1031,6 @@ struct snd_soc_dai wm8900_dai = {
 	 },
 	.ops = &wm8900_dai_ops,
 };
-EXPORT_SYMBOL_GPL(wm8900_dai);
 
 static int wm8900_set_bias_level(struct snd_soc_codec *codec,
 				 enum snd_soc_bias_level level)
@@ -1128,10 +1125,8 @@ static int wm8900_set_bias_level(struct snd_soc_codec *codec,
 	return 0;
 }
 
-static int wm8900_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8900_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;
 	struct wm8900_priv *wm8900 = snd_soc_codec_get_drvdata(codec);
 	int fll_out = wm8900->fll_out;
 	int fll_in  = wm8900->fll_in;
@@ -1140,7 +1135,7 @@ static int wm8900_suspend(struct platform_device *pdev, pm_message_t state)
 	/* Stop the FLL in an orderly fashion */
 	ret = wm8900_set_fll(codec, 0, 0, 0);
 	if (ret != 0) {
-		dev_err(&pdev->dev, "Failed to stop FLL\n");
+		dev_err(codec->dev, "Failed to stop FLL\n");
 		return ret;
 	}
 
@@ -1152,10 +1147,8 @@ static int wm8900_suspend(struct platform_device *pdev, pm_message_t state)
 	return 0;
 }
 
-static int wm8900_resume(struct platform_device *pdev)
+static int wm8900_resume(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
 	struct wm8900_priv *wm8900 = snd_soc_codec_get_drvdata(codec);
 	u16 *cache;
 	int i, ret;
@@ -1176,7 +1169,7 @@ static int wm8900_resume(struct platform_device *pdev)
 
 		ret = wm8900_set_fll(codec, 0, fll_in, fll_out);
 		if (ret != 0) {
-			dev_err(&pdev->dev, "Failed to restart FLL\n");
+			dev_err(codec->dev, "Failed to restart FLL\n");
 			return ret;
 		}
 	}
@@ -1186,60 +1179,33 @@ static int wm8900_resume(struct platform_device *pdev)
 			snd_soc_write(codec, i, cache[i]);
 		kfree(cache);
 	} else
-		dev_err(&pdev->dev, "Unable to allocate register cache\n");
+		dev_err(codec->dev, "Unable to allocate register cache\n");
 
 	return 0;
 }
 
-static struct snd_soc_codec *wm8900_codec;
-
-static __devinit int wm8900_i2c_probe(struct i2c_client *i2c,
-				      const struct i2c_device_id *id)
+static int wm8900_probe(struct snd_soc_codec *codec)
 {
-	struct wm8900_priv *wm8900;
-	struct snd_soc_codec *codec;
-	unsigned int reg;
-	int ret;
-
-	wm8900 = kzalloc(sizeof(struct wm8900_priv), GFP_KERNEL);
-	if (wm8900 == NULL)
-		return -ENOMEM;
+	struct wm8900_priv *wm8900 = snd_soc_codec_get_drvdata(codec);
+	int ret = 0, reg;
 
-	codec = &wm8900->codec;
-	snd_soc_codec_set_drvdata(codec, wm8900);
-	codec->reg_cache = &wm8900->reg_cache[0];
-	codec->reg_cache_size = WM8900_MAXREG;
-
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
-	codec->name = "WM8900";
-	codec->owner = THIS_MODULE;
-	codec->dai = &wm8900_dai;
-	codec->num_dai = 1;
-	codec->control_data = i2c;
-	codec->set_bias_level = wm8900_set_bias_level;
-	codec->volatile_register = wm8900_volatile_register;
-	codec->dev = &i2c->dev;
-
-	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
+	codec->control_data = wm8900->control_data;
+	ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8900->control_type);
 	if (ret != 0) {
-		dev_err(&i2c->dev, "Failed to set cache I/O: %d\n", ret);
-		goto err;
+		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+		return ret;
 	}
 
 	reg = snd_soc_read(codec, WM8900_REG_ID);
 	if (reg != 0x8900) {
-		dev_err(&i2c->dev, "Device is not a WM8900 - ID %x\n", reg);
-		ret = -ENODEV;
-		goto err;
+		dev_err(codec->dev, "Device is not a WM8900 - ID %x\n", reg);
+		return -ENODEV;
 	}
 
 	/* Read back from the chip */
 	reg = snd_soc_read(codec, WM8900_REG_POWER1);
 	reg = (reg >> 12) & 0xf;
-	dev_info(&i2c->dev, "WM8900 revision %d\n", reg);
+	dev_info(codec->dev, "WM8900 revision %d\n", reg);
 
 	wm8900_reset(codec);
 
@@ -1271,43 +1237,97 @@ static __devinit int wm8900_i2c_probe(struct i2c_client *i2c,
 	/* Set the DAC and mixer output bias */
 	snd_soc_write(codec, WM8900_REG_OUTBIASCTL, 0x81);
 
-	wm8900_dai.dev = &i2c->dev;
+	snd_soc_add_controls(codec, wm8900_snd_controls,
+				ARRAY_SIZE(wm8900_snd_controls));
+	wm8900_add_widgets(codec);
 
-	wm8900_codec = codec;
+	return 0;
+}
 
-	ret = snd_soc_register_codec(codec);
-	if (ret != 0) {
-		dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
-		goto err;
-	}
+/* power down chip */
+static int wm8900_remove(struct snd_soc_codec *codec)
+{
+	wm8900_set_bias_level(codec, SND_SOC_BIAS_OFF);
+	return 0;
+}
 
-	ret = snd_soc_register_dai(&wm8900_dai);
-	if (ret != 0) {
-		dev_err(&i2c->dev, "Failed to register DAI: %d\n", ret);
-		goto err_codec;
-	}
+static struct snd_soc_codec_driver soc_codec_dev_wm8900 = {
+	.probe =	wm8900_probe,
+	.remove =	wm8900_remove,
+	.suspend =	wm8900_suspend,
+	.resume =	wm8900_resume,
+	.set_bias_level = wm8900_set_bias_level,
+	.volatile_register = wm8900_volatile_register,
+	.reg_cache_size = sizeof(wm8900_reg_defaults),
+	.reg_word_size = sizeof(u16),
+	.reg_cache_default = wm8900_reg_defaults,
+};
 
-	return ret;
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8900_spi_probe(struct spi_device *spi)
+{
+	struct wm8900_priv *wm8900;
+	int ret;
+
+	wm8900 = kzalloc(sizeof(struct wm8900_priv), GFP_KERNEL);
+	if (wm8900 == NULL)
+		return -ENOMEM;
 
-err_codec:
-	snd_soc_unregister_codec(codec);
-err:
-	kfree(wm8900);
-	wm8900_codec = NULL;
+	wm8900->control_data = spi;
+	wm8900->control_type = SND_SOC_SPI;
+	spi_set_drvdata(spi, wm8900);
+
+	ret = snd_soc_register_codec(&spi->dev,
+			&soc_codec_dev_wm8900, &wm8900_dai, 1);
+	if (ret < 0)
+		kfree(wm8900);
 	return ret;
 }
 
-static __devexit int wm8900_i2c_remove(struct i2c_client *client)
+static int __devexit wm8900_spi_remove(struct spi_device *spi)
 {
-	snd_soc_unregister_dai(&wm8900_dai);
-	snd_soc_unregister_codec(wm8900_codec);
+	snd_soc_unregister_codec(&spi->dev);
+	kfree(spi_get_drvdata(spi));
+	return 0;
+}
 
-	wm8900_set_bias_level(wm8900_codec, SND_SOC_BIAS_OFF);
+static struct spi_driver wm8900_spi_driver = {
+	.driver = {
+		.name	= "wm8900-codec",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= wm8900_spi_probe,
+	.remove		= __devexit_p(wm8900_spi_remove),
+};
+#endif /* CONFIG_SPI_MASTER */
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8900_i2c_probe(struct i2c_client *i2c,
+				      const struct i2c_device_id *id)
+{
+	struct wm8900_priv *wm8900;
+	int ret;
+
+	wm8900 = kzalloc(sizeof(struct wm8900_priv), GFP_KERNEL);
+	if (wm8900 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, wm8900);
+	wm8900->control_data = i2c;
+	wm8900->control_type = SND_SOC_I2C;
 
-	wm8900_dai.dev = NULL;
-	kfree(snd_soc_codec_get_drvdata(wm8900_codec));
-	wm8900_codec = NULL;
+	ret =  snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_wm8900, &wm8900_dai, 1);
+	if (ret < 0)
+		kfree(wm8900);
+	return ret;
+}
 
+static __devexit int wm8900_i2c_remove(struct i2c_client *client)
+{
+	snd_soc_unregister_codec(&client->dev);
+	kfree(i2c_get_clientdata(client));
 	return 0;
 }
 
@@ -1319,71 +1339,44 @@ MODULE_DEVICE_TABLE(i2c, wm8900_i2c_id);
 
 static struct i2c_driver wm8900_i2c_driver = {
 	.driver = {
-		.name = "WM8900",
+		.name = "wm8900-codec",
 		.owner = THIS_MODULE,
 	},
-	.probe = wm8900_i2c_probe,
-	.remove = __devexit_p(wm8900_i2c_remove),
+	.probe =    wm8900_i2c_probe,
+	.remove =   __devexit_p(wm8900_i2c_remove),
 	.id_table = wm8900_i2c_id,
 };
+#endif
 
-static int wm8900_probe(struct platform_device *pdev)
+static int __init wm8900_modinit(void)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec;
 	int ret = 0;
-
-	if (!wm8900_codec) {
-		dev_err(&pdev->dev, "I2C client not yet instantiated\n");
-		return -ENODEV;
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+	ret = i2c_add_driver(&wm8900_i2c_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register wm8900 I2C driver: %d\n",
+		       ret);
 	}
-
-	codec = wm8900_codec;
-	socdev->card->codec = codec;
-
-	/* Register pcms */
-	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "Failed to register new PCMs\n");
-		goto pcm_err;
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	ret = spi_register_driver(&wm8900_spi_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register wm8900 SPI driver: %d\n",
+		       ret);
 	}
-
-	snd_soc_add_controls(codec, wm8900_snd_controls,
-				ARRAY_SIZE(wm8900_snd_controls));
-	wm8900_add_widgets(codec);
-
-pcm_err:
+#endif
 	return ret;
 }
-
-/* power down chip */
-static int wm8900_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_wm8900 = {
-	.probe = 	wm8900_probe,
-	.remove = 	wm8900_remove,
-	.suspend = 	wm8900_suspend,
-	.resume =	wm8900_resume,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8900);
-
-static int __init wm8900_modinit(void)
-{
-	return i2c_add_driver(&wm8900_i2c_driver);
-}
 module_init(wm8900_modinit);
 
 static void __exit wm8900_exit(void)
 {
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 	i2c_del_driver(&wm8900_i2c_driver);
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	spi_unregister_driver(&wm8900_spi_driver);
+#endif
 }
 module_exit(wm8900_exit);