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, 123 insertions, 184 deletions

diff --git a/sound/soc/codecs/wm8993.c b/sound/soc/codecs/wm8993.c
index d8d300c6175..1d9e1837a2d 100644
--- a/sound/soc/codecs/wm8993.c
+++ b/sound/soc/codecs/wm8993.c
@@ -229,7 +229,8 @@ struct wm8993_priv {
 	u16 reg_cache[WM8993_REGISTER_COUNT];
 	struct regulator_bulk_data supplies[WM8993_NUM_SUPPLIES];
 	struct wm8993_platform_data pdata;
-	struct snd_soc_codec codec;
+	enum snd_soc_control_type control_type;
+	void *control_data;
 	int master;
 	int sysclk_source;
 	int tdm_slots;
@@ -367,10 +368,9 @@ static int fll_factors(struct _fll_div *fll_div, unsigned int Fref,
 	return 0;
 }
 
-static int wm8993_set_fll(struct snd_soc_dai *dai, int fll_id, int source,
+static int _wm8993_set_fll(struct snd_soc_codec *codec, int fll_id, int source,
 			  unsigned int Fref, unsigned int Fout)
 {
-	struct snd_soc_codec *codec = dai->codec;
 	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
 	u16 reg1, reg4, reg5;
 	struct _fll_div fll_div;
@@ -456,6 +456,12 @@ static int wm8993_set_fll(struct snd_soc_dai *dai, int fll_id, int source,
 	return 0;
 }
 
+static int wm8993_set_fll(struct snd_soc_dai *dai, int fll_id, int source,
+			  unsigned int Fref, unsigned int Fout)
+{
+	return _wm8993_set_fll(dai->codec, fll_id, source, Fref, Fout);
+}
+
 static int configure_clock(struct snd_soc_codec *codec)
 {
 	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
@@ -1394,8 +1400,8 @@ static struct snd_soc_dai_ops wm8993_ops = {
 			SNDRV_PCM_FMTBIT_S24_LE |\
 			SNDRV_PCM_FMTBIT_S32_LE)
 
-struct snd_soc_dai wm8993_dai = {
-	.name = "WM8993",
+static struct snd_soc_dai_driver wm8993_dai = {
+	.name = "wm8993-hifi",
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 1,
@@ -1413,32 +1419,82 @@ struct snd_soc_dai wm8993_dai = {
 	.ops = &wm8993_ops,
 	.symmetric_rates = 1,
 };
-EXPORT_SYMBOL_GPL(wm8993_dai);
-
-static struct snd_soc_codec *wm8993_codec;
 
-static int wm8993_probe(struct platform_device *pdev)
+static int wm8993_probe(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec;
-	struct wm8993_priv *wm8993;
-	int ret = 0;
+	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
+	int ret, i, val;
+
+	codec->control_data = wm8993->control_data;
+	wm8993->hubs_data.hp_startup_mode = 1;
+	wm8993->hubs_data.dcs_codes = -2;
+
+	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+		return ret;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(wm8993->supplies); i++)
+		wm8993->supplies[i].supply = wm8993_supply_names[i];
 
-	if (!wm8993_codec) {
-		dev_err(&pdev->dev, "I2C device not yet probed\n");
-		goto err;
+	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8993->supplies),
+				 wm8993->supplies);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+		return ret;
 	}
 
-	socdev->card->codec = wm8993_codec;
-	codec = wm8993_codec;
-	wm8993 = snd_soc_codec_get_drvdata(codec);
+	ret = regulator_bulk_enable(ARRAY_SIZE(wm8993->supplies),
+				    wm8993->supplies);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+		goto err_get;
+	}
 
-	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
-	if (ret < 0) {
-		dev_err(codec->dev, "failed to create pcms\n");
-		goto err;
+	val = snd_soc_read(codec, WM8993_SOFTWARE_RESET);
+	if (val != wm8993_reg_defaults[WM8993_SOFTWARE_RESET]) {
+		dev_err(codec->dev, "Invalid ID register value %x\n", val);
+		ret = -EINVAL;
+		goto err_enable;
 	}
 
+	ret = snd_soc_write(codec, WM8993_SOFTWARE_RESET, 0xffff);
+	if (ret != 0)
+		goto err_enable;
+
+	codec->cache_only = 1;
+
+	/* By default we're using the output mixers */
+	wm8993->class_w_users = 2;
+
+	/* Latch volume update bits and default ZC on */
+	snd_soc_update_bits(codec, WM8993_RIGHT_DAC_DIGITAL_VOLUME,
+			    WM8993_DAC_VU, WM8993_DAC_VU);
+	snd_soc_update_bits(codec, WM8993_RIGHT_ADC_DIGITAL_VOLUME,
+			    WM8993_ADC_VU, WM8993_ADC_VU);
+
+	/* Manualy manage the HPOUT sequencing for independent stereo
+	 * control. */
+	snd_soc_update_bits(codec, WM8993_ANALOGUE_HP_0,
+			    WM8993_HPOUT1_AUTO_PU, 0);
+
+	/* Use automatic clock configuration */
+	snd_soc_update_bits(codec, WM8993_CLOCKING_4, WM8993_SR_MODE, 0);
+
+	wm_hubs_handle_analogue_pdata(codec, wm8993->pdata.lineout1_diff,
+				      wm8993->pdata.lineout2_diff,
+				      wm8993->pdata.lineout1fb,
+				      wm8993->pdata.lineout2fb,
+				      wm8993->pdata.jd_scthr,
+				      wm8993->pdata.jd_thr,
+				      wm8993->pdata.micbias1_lvl,
+				      wm8993->pdata.micbias2_lvl);
+
+	ret = wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+	if (ret != 0)
+		goto err_enable;
+
 	snd_soc_add_controls(codec, wm8993_snd_controls,
 			     ARRAY_SIZE(wm8993_snd_controls));
 	if (wm8993->pdata.num_retune_configs != 0) {
@@ -1457,36 +1513,36 @@ static int wm8993_probe(struct platform_device *pdev)
 	wm_hubs_add_analogue_routes(codec, wm8993->pdata.lineout1_diff,
 				    wm8993->pdata.lineout2_diff);
 
-	return ret;
+	return 0;
 
-err:
+err_enable:
+	regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
+err_get:
+	regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
 	return ret;
 }
 
-static int wm8993_remove(struct platform_device *pdev)
+static int wm8993_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);
+	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
 
+	wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF);
+	regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
 	return 0;
 }
 
 #ifdef CONFIG_PM
-static int wm8993_suspend(struct platform_device *pdev, pm_message_t state)
+static int wm8993_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;
 	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
 	int fll_fout = wm8993->fll_fout;
 	int fll_fref  = wm8993->fll_fref;
 	int ret;
 
 	/* Stop the FLL in an orderly fashion */
-	ret = wm8993_set_fll(codec->dai, 0, 0, 0, 0);
+	ret = _wm8993_set_fll(codec, 0, 0, 0, 0);
 	if (ret != 0) {
-		dev_err(&pdev->dev, "Failed to stop FLL\n");
+		dev_err(codec->dev, "Failed to stop FLL\n");
 		return ret;
 	}
 
@@ -1498,10 +1554,8 @@ static int wm8993_suspend(struct platform_device *pdev, pm_message_t state)
 	return 0;
 }
 
-static int wm8993_resume(struct platform_device *pdev)
+static int wm8993_resume(struct snd_soc_codec *codec)
 {
-	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-	struct snd_soc_codec *codec = socdev->card->codec;
 	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
 	int ret;
 
@@ -1515,7 +1569,7 @@ static int wm8993_resume(struct platform_device *pdev)
 		wm8993->fll_fref = 0;
 		wm8993->fll_fout = 0;
 
-		ret = wm8993_set_fll(codec->dai, 0, wm8993->fll_src,
+		ret = _wm8993_set_fll(codec, 0, wm8993->fll_src,
 				     fll_fref, fll_fout);
 		if (ret != 0)
 			dev_err(codec->dev, "Failed to restart FLL\n");
@@ -1528,162 +1582,43 @@ static int wm8993_resume(struct platform_device *pdev)
 #define wm8993_resume NULL
 #endif
 
-struct snd_soc_codec_device soc_codec_dev_wm8993 = {
+static struct snd_soc_codec_driver soc_codec_dev_wm8993 = {
 	.probe = 	wm8993_probe,
 	.remove = 	wm8993_remove,
 	.suspend =	wm8993_suspend,
 	.resume =	wm8993_resume,
+	.set_bias_level = wm8993_set_bias_level,
+	.reg_cache_size = sizeof(wm8993_reg_defaults),
+	.reg_word_size = sizeof(u16),
+	.reg_cache_default = wm8993_reg_defaults,
+	.volatile_register = wm8993_volatile,
 };
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8993);
 
-static int wm8993_i2c_probe(struct i2c_client *i2c,
-			    const struct i2c_device_id *id)
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8993_i2c_probe(struct i2c_client *i2c,
+				      const struct i2c_device_id *id)
 {
 	struct wm8993_priv *wm8993;
-	struct snd_soc_codec *codec;
-	unsigned int val;
 	int ret;
-	int i;
-
-	if (wm8993_codec) {
-		dev_err(&i2c->dev, "A WM8993 is already registered\n");
-		return -EINVAL;
-	}
 
 	wm8993 = kzalloc(sizeof(struct wm8993_priv), GFP_KERNEL);
 	if (wm8993 == NULL)
 		return -ENOMEM;
 
-	codec = &wm8993->codec;
-	if (i2c->dev.platform_data)
-		memcpy(&wm8993->pdata, i2c->dev.platform_data,
-		       sizeof(wm8993->pdata));
-
-	mutex_init(&codec->mutex);
-	INIT_LIST_HEAD(&codec->dapm_widgets);
-	INIT_LIST_HEAD(&codec->dapm_paths);
-
-	codec->name = "WM8993";
-	codec->volatile_register = wm8993_volatile;
-	codec->reg_cache = wm8993->reg_cache;
-	codec->reg_cache_size = ARRAY_SIZE(wm8993->reg_cache);
-	codec->bias_level = SND_SOC_BIAS_OFF;
-	codec->set_bias_level = wm8993_set_bias_level;
-	codec->dai = &wm8993_dai;
-	codec->num_dai = 1;
-	snd_soc_codec_set_drvdata(codec, wm8993);
-
-	wm8993->hubs_data.hp_startup_mode = 1;
-	wm8993->hubs_data.dcs_codes = -2;
-
-	memcpy(wm8993->reg_cache, wm8993_reg_defaults,
-	       sizeof(wm8993->reg_cache));
-
-	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
-		goto err;
-	}
-
 	i2c_set_clientdata(i2c, wm8993);
-	codec->control_data = i2c;
-	wm8993_codec = codec;
-
-	codec->dev = &i2c->dev;
-
-	for (i = 0; i < ARRAY_SIZE(wm8993->supplies); i++)
-		wm8993->supplies[i].supply = wm8993_supply_names[i];
-
-	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8993->supplies),
-				 wm8993->supplies);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
-		goto err;
-	}
-
-	ret = regulator_bulk_enable(ARRAY_SIZE(wm8993->supplies),
-				    wm8993->supplies);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
-		goto err_get;
-	}
-
-	val = snd_soc_read(codec, WM8993_SOFTWARE_RESET);
-	if (val != wm8993_reg_defaults[WM8993_SOFTWARE_RESET]) {
-		dev_err(codec->dev, "Invalid ID register value %x\n", val);
-		ret = -EINVAL;
-		goto err_enable;
-	}
-
-	ret = snd_soc_write(codec, WM8993_SOFTWARE_RESET, 0xffff);
-	if (ret != 0)
-		goto err_enable;
-
-	codec->cache_only = 1;
-
-	/* By default we're using the output mixers */
-	wm8993->class_w_users = 2;
-
-	/* Latch volume update bits and default ZC on */
-	snd_soc_update_bits(codec, WM8993_RIGHT_DAC_DIGITAL_VOLUME,
-			    WM8993_DAC_VU, WM8993_DAC_VU);
-	snd_soc_update_bits(codec, WM8993_RIGHT_ADC_DIGITAL_VOLUME,
-			    WM8993_ADC_VU, WM8993_ADC_VU);
+	wm8993->control_data = i2c;
 
-	/* Manualy manage the HPOUT sequencing for independent stereo
-	 * control. */
-	snd_soc_update_bits(codec, WM8993_ANALOGUE_HP_0,
-			    WM8993_HPOUT1_AUTO_PU, 0);
-
-	/* Use automatic clock configuration */
-	snd_soc_update_bits(codec, WM8993_CLOCKING_4, WM8993_SR_MODE, 0);
-
-	wm_hubs_handle_analogue_pdata(codec, wm8993->pdata.lineout1_diff,
-				      wm8993->pdata.lineout2_diff,
-				      wm8993->pdata.lineout1fb,
-				      wm8993->pdata.lineout2fb,
-				      wm8993->pdata.jd_scthr,
-				      wm8993->pdata.jd_thr,
-				      wm8993->pdata.micbias1_lvl,
-				      wm8993->pdata.micbias2_lvl);
-			     
-	ret = wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-	if (ret != 0)
-		goto err_enable;
-
-	wm8993_dai.dev = codec->dev;
-
-	ret = snd_soc_register_dai(&wm8993_dai);
-	if (ret != 0)
-		goto err_bias;
-
-	ret = snd_soc_register_codec(codec);
-
-	return 0;
-
-err_bias:
-	wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF);
-err_enable:
-	regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
-err_get:
-	regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
-err:
-	wm8993_codec = NULL;
-	kfree(wm8993);
+	ret = snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_wm8993, &wm8993_dai, 1);
+	if (ret < 0)
+		kfree(wm8993);
 	return ret;
 }
 
-static int wm8993_i2c_remove(struct i2c_client *client)
+static __devexit int wm8993_i2c_remove(struct i2c_client *client)
 {
-	struct wm8993_priv *wm8993 = i2c_get_clientdata(client);
-
-	snd_soc_unregister_codec(&wm8993->codec);
-	snd_soc_unregister_dai(&wm8993_dai);
-
-	wm8993_set_bias_level(&wm8993->codec, SND_SOC_BIAS_OFF);
-	regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
-	kfree(wm8993);
-
+	snd_soc_unregister_codec(&client->dev);
+	kfree(i2c_get_clientdata(client));
 	return 0;
 }
 
@@ -1695,30 +1630,34 @@ MODULE_DEVICE_TABLE(i2c, wm8993_i2c_id);
 
 static struct i2c_driver wm8993_i2c_driver = {
 	.driver = {
-		.name = "WM8993",
+		.name = "wm8993-codec",
 		.owner = THIS_MODULE,
 	},
-	.probe = wm8993_i2c_probe,
-	.remove = wm8993_i2c_remove,
+	.probe =    wm8993_i2c_probe,
+	.remove =   __devexit_p(wm8993_i2c_remove),
 	.id_table = wm8993_i2c_id,
 };
-
+#endif
 
 static int __init wm8993_modinit(void)
 {
-	int ret;
-
+	int ret = 0;
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 	ret = i2c_add_driver(&wm8993_i2c_driver);
-	if (ret != 0)
-		pr_err("WM8993: Unable to register I2C driver: %d\n", ret);
-
+	if (ret != 0) {
+		pr_err("WM8993: Unable to register I2C driver: %d\n",
+		       ret);
+	}
+#endif
 	return ret;
 }
 module_init(wm8993_modinit);
 
 static void __exit wm8993_exit(void)
 {
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 	i2c_del_driver(&wm8993_i2c_driver);
+#endif
 }
 module_exit(wm8993_exit);