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, 32 insertions, 125 deletions

diff --git a/sound/soc/codecs/da7210.c b/sound/soc/codecs/da7210.c
index 3c51d6a57523..eabf3c062500 100644
--- a/sound/soc/codecs/da7210.c
+++ b/sound/soc/codecs/da7210.c
@@ -25,8 +25,6 @@
 #include <sound/initval.h>
 #include <sound/tlv.h>
 
-#include "da7210.h"
-
 /* DA7210 register space */
 #define DA7210_STATUS                   0x02
 #define DA7210_STARTUP1                 0x03
@@ -162,11 +160,10 @@ static const struct snd_kcontrol_new da7210_snd_controls[] = {
 
 /* Codec private data */
 struct da7210_priv {
-        struct snd_soc_codec codec;
+        enum snd_soc_control_type control_type;
+        void *control_data;
 };
 
-static struct snd_soc_codec *da7210_codec;
-
 /*
  * Register cache
  */
@@ -209,12 +206,12 @@ static int da7210_write(struct snd_soc_codec *codec, u32 reg, u32 value)
         u8 *cache = codec->reg_cache;
         u8 data[2];
 
-        BUG_ON(codec->volatile_register);
+        BUG_ON(codec->driver->volatile_register);
 
         data[0] = reg & 0xff;
         data[1] = value & 0xff;
 
-        if (reg >= codec->reg_cache_size)
+        if (reg >= codec->driver->reg_cache_size)
                 return -EIO;
 
         if (2 != codec->hw_write(codec->control_data, data, 2))
@@ -267,8 +264,7 @@ static int da7210_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;
         u32 dai_cfg1;
         u32 hpf_reg, hpf_mask, hpf_value;
         u32 fs, bypass;
@@ -430,9 +426,8 @@ static struct snd_soc_dai_ops da7210_dai_ops = {
         .set_fmt        = da7210_set_dai_fmt,
 };
 
-struct snd_soc_dai da7210_dai = {
-        .name = "DA7210 IIS",
-        .id = 0,
+static struct snd_soc_dai_driver da7210_dai = {
+        .name = "da7210-hifi",
         /* playback capabilities */
         .playback = {
                 .stream_name = "Playback",
@@ -452,55 +447,15 @@ struct snd_soc_dai da7210_dai = {
         .ops = &da7210_dai_ops,
         .symmetric_rates = 1,
 };
-EXPORT_SYMBOL_GPL(da7210_dai);
 
-/*
- * Initialize the DA7210 driver
- * register the mixer and dsp interfaces with the kernel
- */
-static int da7210_init(struct da7210_priv *da7210)
+static int da7210_probe(struct snd_soc_codec *codec)
 {
-        struct snd_soc_codec *codec = &da7210->codec;
-        int ret = 0;
+        struct da7210_priv *da7210 = snd_soc_codec_get_drvdata(codec);
 
-        if (da7210_codec) {
-                dev_err(codec->dev, "Another da7210 is registered\n");
-                return -EINVAL;
-        }
+        dev_info(codec->dev, "DA7210 Audio Codec %s\n", DA7210_VERSION);
 
-        mutex_init(&codec->mutex);
-        INIT_LIST_HEAD(&codec->dapm_widgets);
-        INIT_LIST_HEAD(&codec->dapm_paths);
-
-        snd_soc_codec_set_drvdata(codec, da7210);
-        codec->name             = "DA7210";
-        codec->owner            = THIS_MODULE;
-        codec->read             = da7210_read;
-        codec->write            = da7210_write;
-        codec->dai              = &da7210_dai;
-        codec->num_dai          = 1;
+        codec->control_data = da7210->control_data;
         codec->hw_write         = (hw_write_t)i2c_master_send;
-        codec->reg_cache_size   = ARRAY_SIZE(da7210_reg);
-        codec->reg_cache        = kmemdup(da7210_reg,
-                                          sizeof(da7210_reg), GFP_KERNEL);
-
-        if (!codec->reg_cache)
-                return -ENOMEM;
-
-        da7210_dai.dev = codec->dev;
-        da7210_codec = codec;
-
-        ret = snd_soc_register_codec(codec);
-        if (ret) {
-                dev_err(codec->dev, "Failed to register CODEC: %d\n", ret);
-                goto init_err;
-        }
-
-        ret = snd_soc_register_dai(&da7210_dai);
-        if (ret) {
-                dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-                goto codec_err;
-        }
 
         /* FIXME
          *
@@ -583,54 +538,50 @@ static int da7210_init(struct da7210_priv *da7210)
         /* Activate all enabled subsystem */
         da7210_write(codec, DA7210_STARTUP1, DA7210_SC_MST_EN);
 
-        return ret;
-
-codec_err:
-        snd_soc_unregister_codec(codec);
-init_err:
-        kfree(codec->reg_cache);
-        codec->reg_cache = NULL;
+        snd_soc_add_controls(codec, da7210_snd_controls,
+                             ARRAY_SIZE(da7210_snd_controls));
 
-        return ret;
+        dev_info(codec->dev, "DA7210 Audio Codec %s\n", DA7210_VERSION);
 
+        return 0;
 }
 
+static struct snd_soc_codec_driver soc_codec_dev_da7210 = {
+        .probe =        da7210_probe,
+        .read           = da7210_read,
+        .write          = da7210_write,
+        .reg_cache_size = ARRAY_SIZE(da7210_reg),
+        .reg_word_size = sizeof(u8),
+        .reg_cache_default      = da7210_reg,
+};
+
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 static int __devinit da7210_i2c_probe(struct i2c_client *i2c,
                                       const struct i2c_device_id *id)
 {
         struct da7210_priv *da7210;
-        struct snd_soc_codec *codec;
         int ret;
 
         da7210 = kzalloc(sizeof(struct da7210_priv), GFP_KERNEL);
         if (!da7210)
                 return -ENOMEM;
 
-        codec = &da7210->codec;
-        codec->dev = &i2c->dev;
-
         i2c_set_clientdata(i2c, da7210);
-        codec->control_data = i2c;
+        da7210->control_data = i2c;
+        da7210->control_type = SND_SOC_I2C;
 
-        ret = da7210_init(da7210);
-        if (ret < 0) {
-                pr_err("Failed to initialise da7210 audio codec\n");
+        ret =  snd_soc_register_codec(&i2c->dev,
+                        &soc_codec_dev_da7210, &da7210_dai, 1);
+        if (ret < 0)
                 kfree(da7210);
-        }
 
         return ret;
 }
 
 static int __devexit da7210_i2c_remove(struct i2c_client *client)
 {
-        struct da7210_priv *da7210 = i2c_get_clientdata(client);
-
-        snd_soc_unregister_dai(&da7210_dai);
-        kfree(da7210->codec.reg_cache);
-        kfree(da7210);
-        da7210_codec = NULL;
-
+        snd_soc_unregister_codec(&client->dev);
+        kfree(i2c_get_clientdata(client));
         return 0;
 }
 
@@ -643,7 +594,7 @@ MODULE_DEVICE_TABLE(i2c, da7210_i2c_id);
 /* I2C codec control layer */
 static struct i2c_driver da7210_i2c_driver = {
         .driver = {
-                .name = "DA7210 I2C Codec",
+                .name = "da7210-codec",
                 .owner = THIS_MODULE,
         },
         .probe = da7210_i2c_probe,
@@ -652,50 +603,6 @@ static struct i2c_driver da7210_i2c_driver = {
 };
 #endif
 
-static int da7210_probe(struct platform_device *pdev)
-{
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct snd_soc_codec *codec;
-        int ret;
-
-        if (!da7210_codec) {
-                dev_err(&pdev->dev, "Codec device not registered\n");
-                return -ENODEV;
-        }
-
-        socdev->card->codec = da7210_codec;
-        codec = da7210_codec;
-
-        /* Register pcms */
-        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-        if (ret < 0)
-                goto pcm_err;
-
-        snd_soc_add_controls(da7210_codec, da7210_snd_controls,
-                             ARRAY_SIZE(da7210_snd_controls));
-
-        dev_info(&pdev->dev, "DA7210 Audio Codec %s\n", DA7210_VERSION);
-
-pcm_err:
-        return ret;
-}
-
-static int da7210_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_da7210 = {
-        .probe =        da7210_probe,
-        .remove =       da7210_remove,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_da7210);
-
 static int __init da7210_modinit(void)
 {
         int ret = 0;