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, 43 deletions

diff --git a/sound/soc/omap/ams-delta.c b/sound/soc/omap/ams-delta.c
index b0f618e44840..9d88efa06e3c 100644
--- a/sound/soc/omap/ams-delta.c
+++ b/sound/soc/omap/ams-delta.c
@@ -99,7 +99,7 @@ static int ams_delta_set_audio_mode(struct snd_kcontrol *kcontrol,
 	int pin, changed = 0;
 
 	/* Refuse any mode changes if we are not able to control the codec. */
-	if (!codec->control_data)
+	if (!codec->hw_write)
 		return -EUNATCH;
 
 	if (ucontrol->value.enumerated.item[0] >= control->max)
@@ -268,10 +268,32 @@ static void cx81801_timeout(unsigned long data)
 		ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_CODEC, 0);
 }
 
+/*
+ * Used for passing a codec structure pointer
+ * from the board initialization code to the tty line discipline.
+ */
+static struct snd_soc_codec *cx20442_codec;
+
 /* Line discipline .open() */
 static int cx81801_open(struct tty_struct *tty)
 {
-	return v253_ops.open(tty);
+	int ret;
+
+	if (!cx20442_codec)
+		return -ENODEV;
+
+	/*
+	 * Pass the codec structure pointer for use by other ldisc callbacks,
+	 * both the card and the codec specific parts.
+	 */
+	tty->disc_data = cx20442_codec;
+
+	ret = v253_ops.open(tty);
+
+	if (ret < 0)
+		tty->disc_data = NULL;
+
+	return ret;
 }
 
 /* Line discipline .close() */
@@ -281,11 +303,14 @@ static void cx81801_close(struct tty_struct *tty)
 
 	del_timer_sync(&cx81801_timer);
 
-	v253_ops.close(tty);
-
 	/* Prevent the hook switch from further changing the DAPM pins */
 	INIT_LIST_HEAD(&ams_delta_hook_switch.pins);
 
+	if (!codec)
+		return;
+
+	v253_ops.close(tty);
+
 	/* Revert back to default audio input/output constellation */
 	snd_soc_dapm_disable_pin(codec, "Mouthpiece");
 	snd_soc_dapm_enable_pin(codec, "Earpiece");
@@ -310,7 +335,10 @@ static void cx81801_receive(struct tty_struct *tty,
 	const unsigned char *c;
 	int apply, ret;
 
-	if (!codec->control_data) {
+	if (!codec)
+		return;
+
+	if (!codec->hw_write) {
 		/* First modem response, complete setup procedure */
 
 		/* Initialize timer used for config pulse generation */
@@ -323,7 +351,7 @@ static void cx81801_receive(struct tty_struct *tty,
 					ARRAY_SIZE(ams_delta_hook_switch_pins),
 					ams_delta_hook_switch_pins);
 		if (ret)
-			dev_warn(codec->socdev->card->dev,
+			dev_warn(codec->dev,
 				"Failed to link hook switch to DAPM pins, "
 				"will continue with hook switch unlinked.\n");
 
@@ -383,7 +411,7 @@ static int ams_delta_hw_params(struct snd_pcm_substream *substream,
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 
 	/* Set cpu DAI configuration */
-	return snd_soc_dai_set_fmt(rtd->dai->cpu_dai,
+	return snd_soc_dai_set_fmt(rtd->cpu_dai,
 				   SND_SOC_DAIFMT_DSP_A |
 				   SND_SOC_DAIFMT_NB_NF |
 				   SND_SOC_DAIFMT_CBM_CFM);
@@ -398,7 +426,7 @@ static struct snd_soc_ops ams_delta_ops = {
 static int ams_delta_set_bias_level(struct snd_soc_card *card,
 					enum snd_soc_bias_level level)
 {
-	struct snd_soc_codec *codec = card->codec;
+	struct snd_soc_codec *codec = card->rtd->codec;
 
 	switch (level) {
 	case SND_SOC_BIAS_ON:
@@ -461,18 +489,22 @@ static void ams_delta_shutdown(struct snd_pcm_substream *substream)
  * Card initialization
  */
 
-static int ams_delta_cx20442_init(struct snd_soc_codec *codec)
+static int ams_delta_cx20442_init(struct snd_soc_pcm_runtime *rtd)
 {
-	struct snd_soc_dai *codec_dai = codec->dai;
-	struct snd_soc_card *card = codec->socdev->card;
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_card *card = rtd->card;
 	int ret;
 	/* Codec is ready, now add/activate board specific controls */
 
+	/* Store a pointer to the codec structure for tty ldisc use */
+	cx20442_codec = codec;
+
 	/* Set up digital mute if not provided by the codec */
-	if (!codec_dai->ops) {
-		codec_dai->ops = &ams_delta_dai_ops;
-	} else if (!codec_dai->ops->digital_mute) {
-		codec_dai->ops->digital_mute = ams_delta_digital_mute;
+	if (!codec_dai->driver->ops) {
+		codec_dai->driver->ops = &ams_delta_dai_ops;
+	} else if (!codec_dai->driver->ops->digital_mute) {
+		codec_dai->driver->ops->digital_mute = ams_delta_digital_mute;
 	} else {
 		ams_delta_ops.startup = ams_delta_startup;
 		ams_delta_ops.shutdown = ams_delta_shutdown;
@@ -483,7 +515,7 @@ static int ams_delta_cx20442_init(struct snd_soc_codec *codec)
 
 	/* Add hook switch - can be used to control the codec from userspace
 	 * even if line discipline fails */
-	ret = snd_soc_jack_new(card, "hook_switch",
+	ret = snd_soc_jack_new(rtd->codec, "hook_switch",
 				SND_JACK_HEADSET, &ams_delta_hook_switch);
 	if (ret)
 		dev_warn(card->dev,
@@ -551,27 +583,22 @@ static int ams_delta_cx20442_init(struct snd_soc_codec *codec)
 static struct snd_soc_dai_link ams_delta_dai_link = {
 	.name = "CX20442",
 	.stream_name = "CX20442",
-	.cpu_dai = &omap_mcbsp_dai[0],
-	.codec_dai = &cx20442_dai,
+	.cpu_dai_name ="omap-mcbsp-dai.0",
+	.codec_dai_name = "cx20442-hifi",
 	.init = ams_delta_cx20442_init,
+	.platform_name = "omap-pcm-audio",
+	.codec_name = "cx20442-codec",
 	.ops = &ams_delta_ops,
 };
 
 /* Audio card driver */
 static struct snd_soc_card ams_delta_audio_card = {
 	.name = "AMS_DELTA",
-	.platform = &omap_soc_platform,
 	.dai_link = &ams_delta_dai_link,
 	.num_links = 1,
 	.set_bias_level = ams_delta_set_bias_level,
 };
 
-/* Audio subsystem */
-static struct snd_soc_device ams_delta_snd_soc_device = {
-	.card = &ams_delta_audio_card,
-	.codec_dev = &cx20442_codec_dev,
-};
-
 /* Module init/exit */
 static struct platform_device *ams_delta_audio_platform_device;
 static struct platform_device *cx20442_platform_device;
@@ -589,9 +616,7 @@ static int __init ams_delta_module_init(void)
 		return -ENOMEM;
 
 	platform_set_drvdata(ams_delta_audio_platform_device,
-				&ams_delta_snd_soc_device);
-	ams_delta_snd_soc_device.dev = &ams_delta_audio_platform_device->dev;
-	*(unsigned int *)ams_delta_dai_link.cpu_dai->private_data = OMAP_MCBSP1;
+				&ams_delta_audio_card);
 
 	ret = platform_device_add(ams_delta_audio_platform_device);
 	if (ret)
@@ -601,8 +626,8 @@ static int __init ams_delta_module_init(void)
 	 * Codec platform device could be registered from elsewhere (board?),
 	 * but I do it here as it makes sense only if used with the card.
 	 */
-	cx20442_platform_device = platform_device_register_simple("cx20442",
-								-1, NULL, 0);
+	cx20442_platform_device =
+		platform_device_register_simple("cx20442-codec", -1, NULL, 0);
 	return 0;
 err:
 	platform_device_put(ams_delta_audio_platform_device);
@@ -612,19 +637,6 @@ module_init(ams_delta_module_init);
 
 static void __exit ams_delta_module_exit(void)
 {
-	struct snd_soc_codec *codec;
-	struct tty_struct *tty;
-
-	if (ams_delta_audio_card.codec) {
-		codec = ams_delta_audio_card.codec;
-
-		if (codec->control_data) {
-			tty = codec->control_data;
-
-			tty_hangup(tty);
-		}
-	}
-
 	if (tty_unregister_ldisc(N_V253) != 0)
 		dev_warn(&ams_delta_audio_platform_device->dev,
 			"failed to unregister V253 line discipline\n");