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, 55 insertions, 135 deletions

diff --git a/sound/soc/codecs/wm8978.c b/sound/soc/codecs/wm8978.c
index 8a1ad778e7e3..676a4306cc87 100644
--- a/sound/soc/codecs/wm8978.c
+++ b/sound/soc/codecs/wm8978.c
@@ -31,8 +31,6 @@
 
 #include "wm8978.h"
 
-static struct snd_soc_codec *wm8978_codec;
-
 /* wm8978 register cache. Note that register 0 is not included in the cache. */
 static const u16 wm8978_reg[WM8978_CACHEREGNUM] = {
         0x0000, 0x0000, 0x0000, 0x0000, /* 0x00...0x03 */
@@ -54,7 +52,8 @@ static const u16 wm8978_reg[WM8978_CACHEREGNUM] = {
 
 /* codec private data */
 struct wm8978_priv {
-        struct snd_soc_codec codec;
+        enum snd_soc_control_type control_type;
+        void *control_data;
         unsigned int f_pllout;
         unsigned int f_mclk;
         unsigned int f_256fs;
@@ -374,8 +373,8 @@ struct wm8978_pll_div {
 
 #define FIXED_PLL_SIZE (1 << 24)
 
-static void pll_factors(struct wm8978_pll_div *pll_div, unsigned int target,
-                        unsigned int source)
+static void pll_factors(struct snd_soc_codec *codec,
+                struct wm8978_pll_div *pll_div, unsigned int target, unsigned int source)
 {
         u64 k_part;
         unsigned int k, n_div, n_mod;
@@ -390,7 +389,7 @@ static void pll_factors(struct wm8978_pll_div *pll_div, unsigned int target,
         }
 
         if (n_div < 6 || n_div > 12)
-                dev_warn(wm8978_codec->dev,
+                dev_warn(codec->dev,
                          "WM8978 N value exceeds recommended range! N = %u\n",
                          n_div);
 
@@ -505,7 +504,7 @@ static int wm8978_configure_pll(struct snd_soc_codec *codec)
         dev_dbg(codec->dev, "%s: f_MCLK=%uHz, f_PLLOUT=%uHz\n", __func__,
                 wm8978->f_mclk, wm8978->f_pllout);
 
-        pll_factors(&pll_div, f2, wm8978->f_mclk);
+        pll_factors(codec, &pll_div, f2, wm8978->f_mclk);
 
         dev_dbg(codec->dev, "%s: calculated PLL N=0x%x, K=0x%x, div2=%d\n",
                 __func__, pll_div.n, pll_div.k, pll_div.div2);
@@ -690,8 +689,7 @@ static int wm8978_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;
         struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
         /* Word length mask = 0x60 */
         u16 iface_ctl = snd_soc_read(codec, WM8978_AUDIO_INTERFACE) & ~0x60;
@@ -875,9 +873,8 @@ static struct snd_soc_dai_ops wm8978_dai_ops = {
 };
 
 /* Also supports 12kHz */
-struct snd_soc_dai wm8978_dai = {
-        .name = "WM8978 HiFi",
-        .id = 1,
+static struct snd_soc_dai_driver wm8978_dai = {
+        .name = "wm8978-hifi",
         .playback = {
                 .stream_name = "Playback",
                 .channels_min = 1,
@@ -894,13 +891,9 @@ struct snd_soc_dai wm8978_dai = {
         },
         .ops = &wm8978_dai_ops,
 };
-EXPORT_SYMBOL_GPL(wm8978_dai);
 
-static int wm8978_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8978_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;
-
         wm8978_set_bias_level(codec, SND_SOC_BIAS_OFF);
         /* Also switch PLL off */
         snd_soc_write(codec, WM8978_POWER_MANAGEMENT_1, 0);
@@ -908,10 +901,8 @@ static int wm8978_suspend(struct platform_device *pdev, pm_message_t state)
         return 0;
 }
 
-static int wm8978_resume(struct platform_device *pdev)
+static int wm8978_resume(struct snd_soc_codec *codec)
 {
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct snd_soc_codec *codec = socdev->card->codec;
         struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
         int i;
         u16 *cache = codec->reg_cache;
@@ -933,54 +924,6 @@ static int wm8978_resume(struct platform_device *pdev)
         return 0;
 }
 
-static int wm8978_probe(struct platform_device *pdev)
-{
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct snd_soc_codec *codec;
-        int ret = 0;
-
-        if (wm8978_codec == NULL) {
-                dev_err(&pdev->dev, "Codec device not registered\n");
-                return -ENODEV;
-        }
-
-        socdev->card->codec = wm8978_codec;
-        codec = wm8978_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: %d\n", ret);
-                goto pcm_err;
-        }
-
-        snd_soc_add_controls(codec, wm8978_snd_controls,
-                             ARRAY_SIZE(wm8978_snd_controls));
-        wm8978_add_widgets(codec);
-
-pcm_err:
-        return ret;
-}
-
-/* power down chip */
-static int wm8978_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_wm8978 = {
-        .probe          = wm8978_probe,
-        .remove         = wm8978_remove,
-        .suspend        = wm8978_suspend,
-        .resume         = wm8978_resume,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8978);
-
 /*
  * These registers contain an "update" bit - bit 8. This means, for example,
  * that one can write new DAC digital volume for both channels, but only when
@@ -1000,44 +943,23 @@ static const int update_reg[] = {
         WM8978_ROUT2_SPK_CONTROL,
 };
 
-static __devinit int wm8978_register(struct wm8978_priv *wm8978)
+static int wm8978_probe(struct snd_soc_codec *codec)
 {
-        int ret, i;
-        struct snd_soc_codec *codec = &wm8978->codec;
-
-        if (wm8978_codec) {
-                dev_err(codec->dev, "Another WM8978 is registered\n");
-                return -EINVAL;
-        }
+        struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
+        int ret = 0, i;
 
         /*
          * Set default system clock to PLL, it is more precise, this is also the
          * default hardware setting
          */
         wm8978->sysclk = WM8978_PLL;
-
-        mutex_init(&codec->mutex);
-        INIT_LIST_HEAD(&codec->dapm_widgets);
-        INIT_LIST_HEAD(&codec->dapm_paths);
-
-        snd_soc_codec_set_drvdata(codec, wm8978);
-        codec->name = "WM8978";
-        codec->owner = THIS_MODULE;
-        codec->bias_level = SND_SOC_BIAS_OFF;
-        codec->set_bias_level = wm8978_set_bias_level;
-        codec->dai = &wm8978_dai;
-        codec->num_dai = 1;
-        codec->reg_cache_size = WM8978_CACHEREGNUM;
-        codec->reg_cache = &wm8978->reg_cache;
-
+        codec->control_data = wm8978->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);
-                goto err;
+                return ret;
         }
 
-        memcpy(codec->reg_cache, wm8978_reg, sizeof(wm8978_reg));
-
         /*
          * Set the update bit in all registers, that have one. This way all
          * writes to those registers will also cause the update bit to be
@@ -1050,74 +972,61 @@ static __devinit int wm8978_register(struct wm8978_priv *wm8978)
         ret = snd_soc_write(codec, WM8978_RESET, 0);
         if (ret < 0) {
                 dev_err(codec->dev, "Failed to issue reset\n");
-                goto err;
+                return ret;
         }
 
-        wm8978_dai.dev = codec->dev;
-
         wm8978_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
-        wm8978_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(&wm8978_dai);
-        if (ret != 0) {
-                dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-                goto err_codec;
-        }
+        snd_soc_add_controls(codec, wm8978_snd_controls,
+                             ARRAY_SIZE(wm8978_snd_controls));
+        wm8978_add_widgets(codec);
 
         return 0;
-
-err_codec:
-        snd_soc_unregister_codec(codec);
-err:
-        return ret;
 }
 
-static __devexit void wm8978_unregister(struct wm8978_priv *wm8978)
+/* power down chip */
+static int wm8978_remove(struct snd_soc_codec *codec)
 {
-        wm8978_set_bias_level(&wm8978->codec, SND_SOC_BIAS_OFF);
-        snd_soc_unregister_dai(&wm8978_dai);
-        snd_soc_unregister_codec(&wm8978->codec);
-        wm8978_codec = NULL;
+        wm8978_set_bias_level(codec, SND_SOC_BIAS_OFF);
+        return 0;
 }
 
+static struct snd_soc_codec_driver soc_codec_dev_wm8978 = {
+        .probe =        wm8978_probe,
+        .remove =       wm8978_remove,
+        .suspend =      wm8978_suspend,
+        .resume =       wm8978_resume,
+        .set_bias_level = wm8978_set_bias_level,
+        .reg_cache_size = ARRAY_SIZE(wm8978_reg),
+        .reg_word_size = sizeof(u16),
+        .reg_cache_default = wm8978_reg,
+};
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 static __devinit int wm8978_i2c_probe(struct i2c_client *i2c,
                                       const struct i2c_device_id *id)
 {
-        int ret;
         struct wm8978_priv *wm8978;
-        struct snd_soc_codec *codec;
+        int ret;
 
         wm8978 = kzalloc(sizeof(struct wm8978_priv), GFP_KERNEL);
         if (wm8978 == NULL)
                 return -ENOMEM;
 
-        codec = &wm8978->codec;
-        codec->hw_write = (hw_write_t)i2c_master_send;
-
         i2c_set_clientdata(i2c, wm8978);
-        codec->control_data = i2c;
-
-        codec->dev = &i2c->dev;
+        wm8978->control_data = i2c;
 
-        ret = wm8978_register(wm8978);
+        ret = snd_soc_register_codec(&i2c->dev,
+                        &soc_codec_dev_wm8978, &wm8978_dai, 1);
         if (ret < 0)
                 kfree(wm8978);
-
         return ret;
 }
 
 static __devexit int wm8978_i2c_remove(struct i2c_client *client)
 {
-        struct wm8978_priv *wm8978 = i2c_get_clientdata(client);
-        wm8978_unregister(wm8978);
-        kfree(wm8978);
+        snd_soc_unregister_codec(&client->dev);
+        kfree(i2c_get_clientdata(client));
         return 0;
 }
 
@@ -1129,23 +1038,34 @@ MODULE_DEVICE_TABLE(i2c, wm8978_i2c_id);
 
 static struct i2c_driver wm8978_i2c_driver = {
         .driver = {
-                .name = "WM8978",
+                .name = "WM8978-codec",
                 .owner = THIS_MODULE,
         },
         .probe =    wm8978_i2c_probe,
         .remove =   __devexit_p(wm8978_i2c_remove),
         .id_table = wm8978_i2c_id,
 };
+#endif
 
 static int __init wm8978_modinit(void)
 {
-        return i2c_add_driver(&wm8978_i2c_driver);
+        int ret = 0;
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+        ret = i2c_add_driver(&wm8978_i2c_driver);
+        if (ret != 0) {
+                printk(KERN_ERR "Failed to register WM8978 I2C driver: %d\n",
+                       ret);
+        }
+#endif
+        return ret;
 }
 module_init(wm8978_modinit);
 
 static void __exit wm8978_exit(void)
 {
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
         i2c_del_driver(&wm8978_i2c_driver);
+#endif
 }
 module_exit(wm8978_exit);