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, 47 insertions, 124 deletions

diff --git a/sound/soc/codecs/wm8974.c b/sound/soc/codecs/wm8974.c
index 1468fe10cbbe..52f631c62e29 100644
--- a/sound/soc/codecs/wm8974.c
+++ b/sound/soc/codecs/wm8974.c
@@ -51,12 +51,11 @@ static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
 #define WM8974_POWER1_BUFIOEN 0x04
 
 struct wm8974_priv {
-        struct snd_soc_codec codec;
+        enum snd_soc_control_type control_type;
+        void *control_data;
         u16 reg_cache[WM8974_CACHEREGNUM];
 };
 
-static struct snd_soc_codec *wm8974_codec;
-
 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
 
 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
@@ -566,8 +565,8 @@ static struct snd_soc_dai_ops wm8974_ops = {
         .set_pll = wm8974_set_dai_pll,
 };
 
-struct snd_soc_dai wm8974_dai = {
-        .name = "WM8974 HiFi",
+static struct snd_soc_dai_driver wm8974_dai = {
+        .name = "wm8974-hifi",
         .playback = {
                 .stream_name = "Playback",
                 .channels_min = 1,
@@ -583,21 +582,15 @@ struct snd_soc_dai wm8974_dai = {
         .ops = &wm8974_ops,
         .symmetric_rates = 1,
 };
-EXPORT_SYMBOL_GPL(wm8974_dai);
 
-static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8974_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;
-
         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
         return 0;
 }
 
-static int wm8974_resume(struct platform_device *pdev)
+static int wm8974_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;
@@ -613,156 +606,75 @@ static int wm8974_resume(struct platform_device *pdev)
         return 0;
 }
 
-static int wm8974_probe(struct platform_device *pdev)
+static int wm8974_probe(struct snd_soc_codec *codec)
 {
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct snd_soc_codec *codec;
+        struct wm8974_priv *wm8974 = snd_soc_codec_get_drvdata(codec);
         int ret = 0;
 
-        if (wm8974_codec == NULL) {
-                dev_err(&pdev->dev, "Codec device not registered\n");
-                return -ENODEV;
+        codec->control_data = wm8974->control_data;
+        ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
+        if (ret < 0) {
+                dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+                return ret;
         }
 
-        socdev->card->codec = wm8974_codec;
-        codec = wm8974_codec;
-
-        /* register pcms */
-        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+        ret = wm8974_reset(codec);
         if (ret < 0) {
-                dev_err(codec->dev, "failed to create pcms: %d\n", ret);
-                goto pcm_err;
+                dev_err(codec->dev, "Failed to issue reset\n");
+                return ret;
         }
 
+        wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
         snd_soc_add_controls(codec, wm8974_snd_controls,
                              ARRAY_SIZE(wm8974_snd_controls));
         wm8974_add_widgets(codec);
 
         return ret;
-
-pcm_err:
-        return ret;
 }
 
 /* power down chip */
-static int wm8974_remove(struct platform_device *pdev)
+static int wm8974_remove(struct snd_soc_codec *codec)
 {
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-
-        snd_soc_free_pcms(socdev);
-        snd_soc_dapm_free(socdev);
-
+        wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
         return 0;
 }
 
-struct snd_soc_codec_device soc_codec_dev_wm8974 = {
+static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
         .probe =        wm8974_probe,
         .remove =       wm8974_remove,
         .suspend =      wm8974_suspend,
         .resume =       wm8974_resume,
+        .set_bias_level = wm8974_set_bias_level,
+        .reg_cache_size = ARRAY_SIZE(wm8974_reg),
+        .reg_word_size = sizeof(u16),
+        .reg_cache_default = wm8974_reg,
 };
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
-
-static __devinit int wm8974_register(struct wm8974_priv *wm8974)
-{
-        int ret;
-        struct snd_soc_codec *codec = &wm8974->codec;
-
-        if (wm8974_codec) {
-                dev_err(codec->dev, "Another WM8974 is registered\n");
-                ret = -EINVAL;
-                goto err;
-        }
-
-        mutex_init(&codec->mutex);
-        INIT_LIST_HEAD(&codec->dapm_widgets);
-        INIT_LIST_HEAD(&codec->dapm_paths);
-
-        snd_soc_codec_set_drvdata(codec, wm8974);
-        codec->name = "WM8974";
-        codec->owner = THIS_MODULE;
-        codec->bias_level = SND_SOC_BIAS_OFF;
-        codec->set_bias_level = wm8974_set_bias_level;
-        codec->dai = &wm8974_dai;
-        codec->num_dai = 1;
-        codec->reg_cache_size = WM8974_CACHEREGNUM;
-        codec->reg_cache = &wm8974->reg_cache;
-
-        ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
-        if (ret < 0) {
-                dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
-                goto err;
-        }
-
-        memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
-
-        ret = wm8974_reset(codec);
-        if (ret < 0) {
-                dev_err(codec->dev, "Failed to issue reset\n");
-                goto err;
-        }
-
-        wm8974_dai.dev = codec->dev;
-
-        wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
-        wm8974_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_dai(&wm8974_dai);
-        if (ret != 0) {
-                dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-                goto err_codec;
-        }
-
-        return 0;
-
-err_codec:
-        snd_soc_unregister_codec(codec);
-err:
-        kfree(wm8974);
-        return ret;
-}
-
-static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
-{
-        wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
-        snd_soc_unregister_dai(&wm8974_dai);
-        snd_soc_unregister_codec(&wm8974->codec);
-        kfree(wm8974);
-        wm8974_codec = NULL;
-}
 
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
                                       const struct i2c_device_id *id)
 {
         struct wm8974_priv *wm8974;
-        struct snd_soc_codec *codec;
+        int ret;
 
         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
         if (wm8974 == NULL)
                 return -ENOMEM;
 
-        codec = &wm8974->codec;
-        codec->hw_write = (hw_write_t)i2c_master_send;
-
         i2c_set_clientdata(i2c, wm8974);
-        codec->control_data = i2c;
-
-        codec->dev = &i2c->dev;
+        wm8974->control_data = i2c;
 
-        return wm8974_register(wm8974);
+        ret = snd_soc_register_codec(&i2c->dev,
+                        &soc_codec_dev_wm8974, &wm8974_dai, 1);
+        if (ret < 0)
+                kfree(wm8974);
+        return ret;
 }
 
 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
 {
-        struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
-        wm8974_unregister(wm8974);
+        snd_soc_unregister_codec(&client->dev);
+        kfree(i2c_get_clientdata(client));
         return 0;
 }
 
@@ -774,23 +686,34 @@ MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
 
 static struct i2c_driver wm8974_i2c_driver = {
         .driver = {
-                .name = "WM8974",
+                .name = "wm8974-codec",
                 .owner = THIS_MODULE,
         },
         .probe =    wm8974_i2c_probe,
         .remove =   __devexit_p(wm8974_i2c_remove),
         .id_table = wm8974_i2c_id,
 };
+#endif
 
 static int __init wm8974_modinit(void)
 {
-        return i2c_add_driver(&wm8974_i2c_driver);
+        int ret = 0;
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+        ret = i2c_add_driver(&wm8974_i2c_driver);
+        if (ret != 0) {
+                printk(KERN_ERR "Failed to register wm8974 I2C driver: %d\n",
+                       ret);
+        }
+#endif
+        return ret;
 }
 module_init(wm8974_modinit);
 
 static void __exit wm8974_exit(void)
 {
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
         i2c_del_driver(&wm8974_i2c_driver);
+#endif
 }
 module_exit(wm8974_exit);