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, 53 insertions, 96 deletions

diff --git a/sound/soc/codecs/ak4104.c b/sound/soc/codecs/ak4104.c
index 192aebda..c27f8f5 100644
--- a/sound/soc/codecs/ak4104.c
+++ b/sound/soc/codecs/ak4104.c
@@ -17,8 +17,6 @@
 #include <linux/spi/spi.h>
 #include <sound/asoundef.h>
 
-#include "ak4104.h"
-
 /* AK4104 registers addresses */
 #define AK4104_REG_CONTROL1		0x00
 #define AK4104_REG_RESERVED		0x01
@@ -45,11 +43,11 @@
 #define AK4104_TX_TXE			(1 << 0)
 #define AK4104_TX_V			(1 << 1)
 
-#define DRV_NAME "ak4104"
+#define DRV_NAME "ak4104-codec"
 
 struct ak4104_private {
-	struct snd_soc_codec codec;
-	u8 reg_cache[AK4104_NUM_REGS];
+	enum snd_soc_control_type control_type;
+	void *control_data;
 };
 
 static int ak4104_fill_cache(struct snd_soc_codec *codec)
@@ -58,7 +56,7 @@ static int ak4104_fill_cache(struct snd_soc_codec *codec)
 	u8 *reg_cache = codec->reg_cache;
 	struct spi_device *spi = codec->control_data;
 
-	for (i = 0; i < codec->reg_cache_size; i++) {
+	for (i = 0; i < codec->driver->reg_cache_size; i++) {
 		int ret = spi_w8r8(spi, i | AK4104_READ);
 		if (ret < 0) {
 			dev_err(&spi->dev, "SPI write failure\n");
@@ -76,7 +74,7 @@ static unsigned int ak4104_read_reg_cache(struct snd_soc_codec *codec,
 {
 	u8 *reg_cache = codec->reg_cache;
 
-	if (reg >= codec->reg_cache_size)
+	if (reg >= codec->driver->reg_cache_size)
 		return -EINVAL;
 
 	return reg_cache[reg];
@@ -88,7 +86,7 @@ static int ak4104_spi_write(struct snd_soc_codec *codec, unsigned int reg,
 	u8 *cache = codec->reg_cache;
 	struct spi_device *spi = codec->control_data;
 
-	if (reg >= codec->reg_cache_size)
+	if (reg >= codec->driver->reg_cache_size)
 		return -EINVAL;
 
 	/* only write to the hardware if value has changed */
@@ -145,8 +143,7 @@ static int ak4104_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;
 	int val = 0;
 
 	/* set the IEC958 bits: consumer mode, no copyright bit */
@@ -178,8 +175,8 @@ static struct snd_soc_dai_ops ak4101_dai_ops = {
 	.set_fmt = ak4104_set_dai_fmt,
 };
 
-struct snd_soc_dai ak4104_dai = {
-	.name = DRV_NAME,
+static struct snd_soc_dai_driver ak4104_dai = {
+	.name = "ak4104-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
@@ -192,45 +189,17 @@ struct snd_soc_dai ak4104_dai = {
 	.ops = &ak4101_dai_ops,
 };
 
-static struct snd_soc_codec *ak4104_codec;
-
-static int ak4104_spi_probe(struct spi_device *spi)
+static int ak4104_probe(struct snd_soc_codec *codec)
 {
-	struct snd_soc_codec *codec;
-	struct ak4104_private *ak4104;
+	struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
 	int ret, val;
 
-	spi->bits_per_word = 8;
-	spi->mode = SPI_MODE_0;
-	ret = spi_setup(spi);
-	if (ret < 0)
-		return ret;
-
-	ak4104 = kzalloc(sizeof(struct ak4104_private), GFP_KERNEL);
-	if (!ak4104) {
-		dev_err(&spi->dev, "could not allocate codec\n");
-		return -ENOMEM;
-	}
-
-	codec = &ak4104->codec;
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
-	codec->dev = &spi->dev;
-	codec->name = DRV_NAME;
-	codec->owner = THIS_MODULE;
-	codec->dai = &ak4104_dai;
-	codec->num_dai = 1;
-	snd_soc_codec_set_drvdata(codec, ak4104);
-	codec->control_data = spi;
-	codec->reg_cache = ak4104->reg_cache;
-	codec->reg_cache_size = AK4104_NUM_REGS;
+	codec->control_data = ak4104->control_data;
 
 	/* read all regs and fill the cache */
 	ret = ak4104_fill_cache(codec);
 	if (ret < 0) {
-		dev_err(&spi->dev, "failed to fill register cache\n");
+		dev_err(codec->dev, "failed to fill register cache\n");
 		return ret;
 	}
 
@@ -238,93 +207,81 @@ static int ak4104_spi_probe(struct spi_device *spi)
 	 * should contain 0x5b. Not a good way to verify the presence of
 	 * the device, but there is no hardware ID register. */
 	if (ak4104_read_reg_cache(codec, AK4104_REG_RESERVED) !=
-					 AK4104_RESERVED_VAL) {
-		ret = -ENODEV;
-		goto error_free_codec;
-	}
+					 AK4104_RESERVED_VAL)
+		return -ENODEV;
 
 	/* set power-up and non-reset bits */
 	val = ak4104_read_reg_cache(codec, AK4104_REG_CONTROL1);
 	val |= AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN;
 	ret = ak4104_spi_write(codec, AK4104_REG_CONTROL1, val);
 	if (ret < 0)
-		goto error_free_codec;
+		return ret;
 
 	/* enable transmitter */
 	val = ak4104_read_reg_cache(codec, AK4104_REG_TX);
 	val |= AK4104_TX_TXE;
 	ret = ak4104_spi_write(codec, AK4104_REG_TX, val);
 	if (ret < 0)
-		goto error_free_codec;
-
-	ak4104_codec = codec;
-	ret = snd_soc_register_dai(&ak4104_dai);
-	if (ret < 0) {
-		dev_err(&spi->dev, "failed to register DAI\n");
-		goto error_free_codec;
-	}
+		return ret;
 
-	spi_set_drvdata(spi, ak4104);
-	dev_info(&spi->dev, "SPI device initialized\n");
+	dev_info(codec->dev, "SPI device initialized\n");
 	return 0;
-
-error_free_codec:
-	kfree(ak4104);
-	ak4104_dai.dev = NULL;
-	return ret;
 }
 
-static int __devexit ak4104_spi_remove(struct spi_device *spi)
+static int ak4104_remove(struct snd_soc_codec *codec)
 {
-	int ret, val;
-	struct ak4104_private *ak4104 = spi_get_drvdata(spi);
+	int val, ret;
 
-	val = ak4104_read_reg_cache(&ak4104->codec, AK4104_REG_CONTROL1);
+	val = ak4104_read_reg_cache(codec, AK4104_REG_CONTROL1);
 	if (val < 0)
 		return val;
 
 	/* clear power-up and non-reset bits */
 	val &= ~(AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
-	ret = ak4104_spi_write(&ak4104->codec, AK4104_REG_CONTROL1, val);
-	if (ret < 0)
-		return ret;
+	ret = ak4104_spi_write(codec, AK4104_REG_CONTROL1, val);
 
-	ak4104_codec = NULL;
-	kfree(ak4104);
-	return 0;
+	return ret;
 }
 
-static int ak4104_probe(struct platform_device *pdev)
+static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
+	.probe =	ak4104_probe,
+	.remove =	ak4104_remove,
+	.reg_cache_size = AK4104_NUM_REGS,
+	.reg_word_size = sizeof(u16),
+};
+
+static int ak4104_spi_probe(struct spi_device *spi)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = ak4104_codec;
+	struct ak4104_private *ak4104;
 	int ret;
 
-	/* Connect the codec to the socdev.  snd_soc_new_pcms() needs this. */
-	socdev->card->codec = codec;
-
-	/* Register PCMs */
-	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-	if (ret < 0) {
-		dev_err(codec->dev, "failed to create pcms\n");
+	spi->bits_per_word = 8;
+	spi->mode = SPI_MODE_0;
+	ret = spi_setup(spi);
+	if (ret < 0)
 		return ret;
-	}
 
-	return 0;
+	ak4104 = kzalloc(sizeof(struct ak4104_private), GFP_KERNEL);
+	if (ak4104 == NULL)
+		return -ENOMEM;
+
+	ak4104->control_data = spi;
+	ak4104->control_type = SND_SOC_SPI;
+	spi_set_drvdata(spi, ak4104);
+
+	ret = snd_soc_register_codec(&spi->dev,
+			&soc_codec_device_ak4104, &ak4104_dai, 1);
+	if (ret < 0)
+		kfree(ak4104);
+	return ret;
 }
 
-static int ak4104_remove(struct platform_device *pdev)
+static int __devexit ak4104_spi_remove(struct spi_device *spi)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	snd_soc_free_pcms(socdev);
+	snd_soc_unregister_codec(&spi->dev);
+	kfree(spi_get_drvdata(spi));
 	return 0;
-};
-
-struct snd_soc_codec_device soc_codec_device_ak4104 = {
-	.probe = 	ak4104_probe,
-	.remove = 	ak4104_remove
-};
-EXPORT_SYMBOL_GPL(soc_codec_device_ak4104);
+}
 
 static struct spi_driver ak4104_spi_driver = {
 	.driver  = {