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, 56 insertions, 143 deletions

diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
index f0c11138e610..d28bf0dfdb1d 100644
--- a/sound/soc/codecs/wm8940.c
+++ b/sound/soc/codecs/wm8940.c
@@ -44,7 +44,8 @@
 struct wm8940_priv {
         unsigned int sysclk;
         u16 reg_cache[WM8940_CACHEREGNUM];
-        struct snd_soc_codec codec;
+        enum snd_soc_control_type control_type;
+        void *control_data;
 };
 
 static u16 wm8940_reg_defaults[] = {
@@ -365,8 +366,7 @@ static int wm8940_i2s_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 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
         u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
         u16 companding =  snd_soc_read(codec,
@@ -636,8 +636,8 @@ static struct snd_soc_dai_ops wm8940_dai_ops = {
         .set_pll = wm8940_set_dai_pll,
 };
 
-struct snd_soc_dai wm8940_dai = {
-        .name = "WM8940",
+static struct snd_soc_dai_driver wm8940_dai = {
+        .name = "wm8940-hifi",
         .playback = {
                 .stream_name = "Playback",
                 .channels_min = 1,
@@ -655,20 +655,14 @@ struct snd_soc_dai wm8940_dai = {
         .ops = &wm8940_dai_ops,
         .symmetric_rates = 1,
 };
-EXPORT_SYMBOL_GPL(wm8940_dai);
 
-static int wm8940_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8940_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;
-
         return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
 }
 
-static int wm8940_resume(struct platform_device *pdev)
+static int wm8940_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;
         int ret;
         u8 data[3];
@@ -697,108 +691,26 @@ error_ret:
         return ret;
 }
 
-static struct snd_soc_codec *wm8940_codec;
-
-static int wm8940_probe(struct platform_device *pdev)
-{
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct snd_soc_codec *codec;
-
-        int ret = 0;
-
-        if (wm8940_codec == NULL) {
-                dev_err(&pdev->dev, "Codec device not registered\n");
-                return -ENODEV;
-        }
-
-        socdev->card->codec = wm8940_codec;
-        codec = wm8940_codec;
-
-        mutex_init(&codec->mutex);
-        /* 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: %d\n", ret);
-                goto pcm_err;
-        }
-
-        ret = snd_soc_add_controls(codec, wm8940_snd_controls,
-                             ARRAY_SIZE(wm8940_snd_controls));
-        if (ret)
-                goto error_free_pcms;
-        ret = wm8940_add_widgets(codec);
-        if (ret)
-                goto error_free_pcms;
-
-        return ret;
-
-error_free_pcms:
-        snd_soc_free_pcms(socdev);
-        snd_soc_dapm_free(socdev);
-pcm_err:
-        return ret;
-}
-
-static int wm8940_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_wm8940 = {
-        .probe = wm8940_probe,
-        .remove = wm8940_remove,
-        .suspend = wm8940_suspend,
-        .resume = wm8940_resume,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940);
-
-static int wm8940_register(struct wm8940_priv *wm8940,
-                           enum snd_soc_control_type control)
+static int wm8940_probe(struct snd_soc_codec *codec)
 {
-        struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data;
-        struct snd_soc_codec *codec = &wm8940->codec;
+        struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
+        struct wm8940_setup_data *pdata = codec->dev->platform_data;
         int ret;
         u16 reg;
-        if (wm8940_codec) {
-                dev_err(codec->dev, "Another WM8940 is registered\n");
-                return -EINVAL;
-        }
-
-        INIT_LIST_HEAD(&codec->dapm_widgets);
-        INIT_LIST_HEAD(&codec->dapm_paths);
-
-        snd_soc_codec_set_drvdata(codec, wm8940);
-        codec->name = "WM8940";
-        codec->owner = THIS_MODULE;
-        codec->bias_level = SND_SOC_BIAS_OFF;
-        codec->set_bias_level = wm8940_set_bias_level;
-        codec->dai = &wm8940_dai;
-        codec->num_dai = 1;
-        codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults);
-        codec->reg_cache = &wm8940->reg_cache;
 
-        ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
+        codec->control_data = wm8940->control_data;
+        ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
         if (ret < 0) {
                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
                 return ret;
         }
 
-        memcpy(codec->reg_cache, wm8940_reg_defaults,
-               sizeof(wm8940_reg_defaults));
-
         ret = wm8940_reset(codec);
         if (ret < 0) {
                 dev_err(codec->dev, "Failed to issue reset\n");
                 return ret;
         }
 
-        wm8940_dai.dev = codec->dev;
-
         wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
         ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
@@ -814,64 +726,60 @@ static int wm8940_register(struct wm8940_priv *wm8940,
                         return ret;
         }
 
-
-        wm8940_codec = codec;
-
-        ret = snd_soc_register_codec(codec);
-        if (ret) {
-                dev_err(codec->dev, "Failed to register codec: %d\n", ret);
+        ret = snd_soc_add_controls(codec, wm8940_snd_controls,
+                             ARRAY_SIZE(wm8940_snd_controls));
+        if (ret)
                 return ret;
-        }
-
-        ret = snd_soc_register_dai(&wm8940_dai);
-        if (ret) {
-                dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-                snd_soc_unregister_codec(codec);
+        ret = wm8940_add_widgets(codec);
+        if (ret)
                 return ret;
-        }
 
-        return 0;
+        return ret;
+;
 }
 
-static void wm8940_unregister(struct wm8940_priv *wm8940)
+static int wm8940_remove(struct snd_soc_codec *codec)
 {
-        wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF);
-        snd_soc_unregister_dai(&wm8940_dai);
-        snd_soc_unregister_codec(&wm8940->codec);
-        kfree(wm8940);
-        wm8940_codec = NULL;
+        wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
+        return 0;
 }
 
-static int wm8940_i2c_probe(struct i2c_client *i2c,
-                            const struct i2c_device_id *id)
+static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
+        .probe =        wm8940_probe,
+        .remove =       wm8940_remove,
+        .suspend =      wm8940_suspend,
+        .resume =       wm8940_resume,
+        .set_bias_level = wm8940_set_bias_level,
+        .reg_cache_size = sizeof(wm8940_reg_defaults),
+        .reg_word_size = sizeof(u16),
+        .reg_cache_default = wm8940_reg_defaults,
+};
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8940_i2c_probe(struct i2c_client *i2c,
+                                      const struct i2c_device_id *id)
 {
-        int ret;
         struct wm8940_priv *wm8940;
-        struct snd_soc_codec *codec;
+        int ret;
 
-        wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL);
+        wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL);
         if (wm8940 == NULL)
                 return -ENOMEM;
 
-        codec = &wm8940->codec;
-        codec->hw_write = (hw_write_t)i2c_master_send;
         i2c_set_clientdata(i2c, wm8940);
-        codec->control_data = i2c;
-        codec->dev = &i2c->dev;
+        wm8940->control_data = i2c;
 
-        ret = wm8940_register(wm8940, SND_SOC_I2C);
+        ret = snd_soc_register_codec(&i2c->dev,
+                        &soc_codec_dev_wm8940, &wm8940_dai, 1);
         if (ret < 0)
                 kfree(wm8940);
-
         return ret;
 }
 
-static int __devexit wm8940_i2c_remove(struct i2c_client *client)
+static __devexit int wm8940_i2c_remove(struct i2c_client *client)
 {
-        struct wm8940_priv *wm8940 = i2c_get_clientdata(client);
-
-        wm8940_unregister(wm8940);
-
+        snd_soc_unregister_codec(&client->dev);
+        kfree(i2c_get_clientdata(client));
         return 0;
 }
 
@@ -883,29 +791,34 @@ MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
 
 static struct i2c_driver wm8940_i2c_driver = {
         .driver = {
-                .name = "WM8940 I2C Codec",
+                .name = "wm8940-codec",
                 .owner = THIS_MODULE,
         },
-        .probe = wm8940_i2c_probe,
-        .remove = __devexit_p(wm8940_i2c_remove),
+        .probe =    wm8940_i2c_probe,
+        .remove =   __devexit_p(wm8940_i2c_remove),
         .id_table = wm8940_i2c_id,
 };
+#endif
 
 static int __init wm8940_modinit(void)
 {
-        int ret;
-
+        int ret = 0;
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
         ret = i2c_add_driver(&wm8940_i2c_driver);
-        if (ret)
-                printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n",
+        if (ret != 0) {
+                printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n",
                        ret);
+        }
+#endif
         return ret;
 }
 module_init(wm8940_modinit);
 
 static void __exit wm8940_exit(void)
 {
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
         i2c_del_driver(&wm8940_i2c_driver);
+#endif
 }
 module_exit(wm8940_exit);