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, 95 insertions, 199 deletions

diff --git a/sound/soc/codecs/wm8728.c b/sound/soc/codecs/wm8728.c
index 34be2d2b69ef..ae2292444783 100644
--- a/sound/soc/codecs/wm8728.c
+++ b/sound/soc/codecs/wm8728.c
@@ -29,8 +29,6 @@
 
 #include "wm8728.h"
 
-struct snd_soc_codec_device soc_codec_dev_wm8728;
-
 /*
  * We can't read the WM8728 register space so we cache them instead.
  * Note that the defaults here aren't the physical defaults, we latch
@@ -44,6 +42,12 @@ static const u16 wm8728_reg_defaults[] = {
         0x100,
 };
 
+/* codec private data */
+struct wm8728_priv {
+        enum snd_soc_control_type control_type;
+        void *control_data;
+};
+
 static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
 
 static const struct snd_kcontrol_new wm8728_snd_controls[] = {
@@ -96,8 +100,7 @@ static int wm8728_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 dac = snd_soc_read(codec, WM8728_DACCTL);
 
         dac &= ~0x18;
@@ -210,8 +213,8 @@ static struct snd_soc_dai_ops wm8728_dai_ops = {
         .set_fmt        = wm8728_set_dai_fmt,
 };
 
-struct snd_soc_dai wm8728_dai = {
-        .name = "WM8728",
+static struct snd_soc_dai_driver wm8728_dai = {
+        .name = "wm8728-hifi",
         .playback = {
                 .stream_name = "Playback",
                 .channels_min = 2,
@@ -221,63 +224,32 @@ struct snd_soc_dai wm8728_dai = {
         },
         .ops = &wm8728_dai_ops,
 };
-EXPORT_SYMBOL_GPL(wm8728_dai);
 
-static int wm8728_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8728_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;
-
         wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
 
         return 0;
 }
 
-static int wm8728_resume(struct platform_device *pdev)
+static int wm8728_resume(struct snd_soc_codec *codec)
 {
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct snd_soc_codec *codec = socdev->card->codec;
-
         wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
         return 0;
 }
 
-/*
- * initialise the WM8728 driver
- * register the mixer and dsp interfaces with the kernel
- */
-static int wm8728_init(struct snd_soc_device *socdev,
-                       enum snd_soc_control_type control)
+static int wm8728_probe(struct snd_soc_codec *codec)
 {
-        struct snd_soc_codec *codec = socdev->card->codec;
-        int ret = 0;
-
-        codec->name = "WM8728";
-        codec->owner = THIS_MODULE;
-        codec->set_bias_level = wm8728_set_bias_level;
-        codec->dai = &wm8728_dai;
-        codec->num_dai = 1;
-        codec->bias_level = SND_SOC_BIAS_OFF;
-        codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults);
-        codec->reg_cache = kmemdup(wm8728_reg_defaults,
-                                   sizeof(wm8728_reg_defaults),
-                                   GFP_KERNEL);
-        if (codec->reg_cache == NULL)
-                return -ENOMEM;
+        struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
+        int ret;
 
-        ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
+        codec->control_data = wm8728->control_data;
+        ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type);
         if (ret < 0) {
                 printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
                        ret);
-                goto err;
-        }
-
-        /* register pcms */
-        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-        if (ret < 0) {
-                printk(KERN_ERR "wm8728: failed to create pcms\n");
-                goto err;
+                return ret;
         }
 
         /* power on device */
@@ -288,128 +260,56 @@ static int wm8728_init(struct snd_soc_device *socdev,
         wm8728_add_widgets(codec);
 
         return ret;
-
-err:
-        kfree(codec->reg_cache);
-        return ret;
 }
 
-static struct snd_soc_device *wm8728_socdev;
-
-#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
-
-/*
- * WM8728 2 wire address is determined by GPIO5
- * state during powerup.
- *    low  = 0x1a
- *    high = 0x1b
- */
-
-static int wm8728_i2c_probe(struct i2c_client *i2c,
-                            const struct i2c_device_id *id)
+static int wm8728_remove(struct snd_soc_codec *codec)
 {
-        struct snd_soc_device *socdev = wm8728_socdev;
-        struct snd_soc_codec *codec = socdev->card->codec;
-        int ret;
-
-        i2c_set_clientdata(i2c, codec);
-        codec->control_data = i2c;
-
-        ret = wm8728_init(socdev, SND_SOC_I2C);
-        if (ret < 0)
-                pr_err("failed to initialise WM8728\n");
-
-        return ret;
-}
-
-static int wm8728_i2c_remove(struct i2c_client *client)
-{
-        struct snd_soc_codec *codec = i2c_get_clientdata(client);
-        kfree(codec->reg_cache);
+        wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
         return 0;
 }
 
-static const struct i2c_device_id wm8728_i2c_id[] = {
-        { "wm8728", 0 },
-        { }
-};
-MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
-
-static struct i2c_driver wm8728_i2c_driver = {
-        .driver = {
-                .name = "WM8728 I2C Codec",
-                .owner = THIS_MODULE,
-        },
-        .probe =    wm8728_i2c_probe,
-        .remove =   wm8728_i2c_remove,
-        .id_table = wm8728_i2c_id,
+static struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
+        .probe =        wm8728_probe,
+        .remove =       wm8728_remove,
+        .suspend =      wm8728_suspend,
+        .resume =       wm8728_resume,
+        .set_bias_level = wm8728_set_bias_level,
+        .reg_cache_size = sizeof(wm8728_reg_defaults),
+        .reg_word_size = sizeof(u16),
+        .reg_cache_default = wm8728_reg_defaults,
 };
 
-static int wm8728_add_i2c_device(struct platform_device *pdev,
-                                 const struct wm8728_setup_data *setup)
-{
-        struct i2c_board_info info;
-        struct i2c_adapter *adapter;
-        struct i2c_client *client;
-        int ret;
-
-        ret = i2c_add_driver(&wm8728_i2c_driver);
-        if (ret != 0) {
-                dev_err(&pdev->dev, "can't add i2c driver\n");
-                return ret;
-        }
-
-        memset(&info, 0, sizeof(struct i2c_board_info));
-        info.addr = setup->i2c_address;
-        strlcpy(info.type, "wm8728", I2C_NAME_SIZE);
-
-        adapter = i2c_get_adapter(setup->i2c_bus);
-        if (!adapter) {
-                dev_err(&pdev->dev, "can't get i2c adapter %d\n",
-                        setup->i2c_bus);
-                goto err_driver;
-        }
-
-        client = i2c_new_device(adapter, &info);
-        i2c_put_adapter(adapter);
-        if (!client) {
-                dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
-                        (unsigned int)info.addr);
-                goto err_driver;
-        }
-
-        return 0;
-
-err_driver:
-        i2c_del_driver(&wm8728_i2c_driver);
-        return -ENODEV;
-}
-#endif
-
 #if defined(CONFIG_SPI_MASTER)
 static int __devinit wm8728_spi_probe(struct spi_device *spi)
 {
-        struct snd_soc_device *socdev = wm8728_socdev;
-        struct snd_soc_codec *codec = socdev->card->codec;
+        struct wm8728_priv *wm8728;
         int ret;
 
-        codec->control_data = spi;
+        wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
+        if (wm8728 == NULL)
+                return -ENOMEM;
 
-        ret = wm8728_init(socdev, SND_SOC_SPI);
-        if (ret < 0)
-                dev_err(&spi->dev, "failed to initialise WM8728\n");
+        wm8728->control_data = spi;
+        wm8728->control_type = SND_SOC_SPI;
+        spi_set_drvdata(spi, wm8728);
 
+        ret = snd_soc_register_codec(&spi->dev,
+                        &soc_codec_dev_wm8728, &wm8728_dai, 1);
+        if (ret < 0)
+                kfree(wm8728);
         return ret;
 }
 
 static int __devexit wm8728_spi_remove(struct spi_device *spi)
 {
+        snd_soc_unregister_codec(&spi->dev);
+        kfree(spi_get_drvdata(spi));
         return 0;
 }
 
 static struct spi_driver wm8728_spi_driver = {
         .driver = {
-                .name   = "wm8728",
+                .name   = "wm8728-codec",
                 .bus    = &spi_bus_type,
                 .owner  = THIS_MODULE,
         },
@@ -418,85 +318,81 @@ static struct spi_driver wm8728_spi_driver = {
 };
 #endif /* CONFIG_SPI_MASTER */
 
-static int wm8728_probe(struct platform_device *pdev)
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8728_i2c_probe(struct i2c_client *i2c,
+                                      const struct i2c_device_id *id)
 {
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct wm8728_setup_data *setup;
-        struct snd_soc_codec *codec;
-        int ret = 0;
+        struct wm8728_priv *wm8728;
+        int ret;
 
-        setup = socdev->codec_data;
-        codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
-        if (codec == NULL)
+        wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL);
+        if (wm8728 == NULL)
                 return -ENOMEM;
 
-        socdev->card->codec = codec;
-        mutex_init(&codec->mutex);
-        INIT_LIST_HEAD(&codec->dapm_widgets);
-        INIT_LIST_HEAD(&codec->dapm_paths);
+        i2c_set_clientdata(i2c, wm8728);
+        wm8728->control_data = i2c;
+        wm8728->control_type = SND_SOC_I2C;
+
+        ret =  snd_soc_register_codec(&i2c->dev,
+                        &soc_codec_dev_wm8728, &wm8728_dai, 1);
+        if (ret < 0)
+                kfree(wm8728);
+        return ret;
+}
+
+static __devexit int wm8728_i2c_remove(struct i2c_client *client)
+{
+        snd_soc_unregister_codec(&client->dev);
+        kfree(i2c_get_clientdata(client));
+        return 0;
+}
 
-        wm8728_socdev = socdev;
-        ret = -ENODEV;
+static const struct i2c_device_id wm8728_i2c_id[] = {
+        { "wm8728", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
+
+static struct i2c_driver wm8728_i2c_driver = {
+        .driver = {
+                .name = "wm8728-codec",
+                .owner = THIS_MODULE,
+        },
+        .probe =    wm8728_i2c_probe,
+        .remove =   __devexit_p(wm8728_i2c_remove),
+        .id_table = wm8728_i2c_id,
+};
+#endif
 
+static int __init wm8728_modinit(void)
+{
+        int ret = 0;
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
-        if (setup->i2c_address) {
-                ret = wm8728_add_i2c_device(pdev, setup);
+        ret = i2c_add_driver(&wm8728_i2c_driver);
+        if (ret != 0) {
+                printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
+                       ret);
         }
 #endif
 #if defined(CONFIG_SPI_MASTER)
-        if (setup->spi) {
-                ret = spi_register_driver(&wm8728_spi_driver);
-                if (ret != 0)
-                        printk(KERN_ERR "can't add spi driver");
+        ret = spi_register_driver(&wm8728_spi_driver);
+        if (ret != 0) {
+                printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
+                       ret);
         }
 #endif
-
-        if (ret != 0)
-                kfree(codec);
-
         return ret;
 }
+module_init(wm8728_modinit);
 
-/* power down chip */
-static int wm8728_remove(struct platform_device *pdev)
+static void __exit wm8728_exit(void)
 {
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct snd_soc_codec *codec = socdev->card->codec;
-
-        if (codec->control_data)
-                wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
-
-        snd_soc_free_pcms(socdev);
-        snd_soc_dapm_free(socdev);
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
-        i2c_unregister_device(codec->control_data);
         i2c_del_driver(&wm8728_i2c_driver);
 #endif
 #if defined(CONFIG_SPI_MASTER)
         spi_unregister_driver(&wm8728_spi_driver);
 #endif
-        kfree(codec);
-
-        return 0;
-}
-
-struct snd_soc_codec_device soc_codec_dev_wm8728 = {
-        .probe =        wm8728_probe,
-        .remove =       wm8728_remove,
-        .suspend =      wm8728_suspend,
-        .resume =       wm8728_resume,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);
-
-static int __init wm8728_modinit(void)
-{
-        return snd_soc_register_dai(&wm8728_dai);
-}
-module_init(wm8728_modinit);
-
-static void __exit wm8728_exit(void)
-{
-        snd_soc_unregister_dai(&wm8728_dai);
 }
 module_exit(wm8728_exit);