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, 63 insertions, 35 deletions

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 377693a14385..e7b680248006 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -91,15 +91,17 @@ struct snd_pcm_substream;
                                SNDRV_PCM_FMTBIT_S32_LE |\
                                SNDRV_PCM_FMTBIT_S32_BE)
 
-struct snd_soc_dai_ops;
+struct snd_soc_dai_driver;
 struct snd_soc_dai;
 struct snd_ac97_bus_ops;
 
 /* Digital Audio Interface registration */
-int snd_soc_register_dai(struct snd_soc_dai *dai);
-void snd_soc_unregister_dai(struct snd_soc_dai *dai);
-int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count);
-void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count);
+int snd_soc_register_dai(struct device *dev,
+                struct snd_soc_dai_driver *dai_drv);
+void snd_soc_unregister_dai(struct device *dev);
+int snd_soc_register_dais(struct device *dev,
+                struct snd_soc_dai_driver *dai_drv, size_t count);
+void snd_soc_unregister_dais(struct device *dev, size_t count);
 
 /* Digital Audio Interface clocking API.*/
 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
@@ -126,16 +128,6 @@ int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
 /* Digital Audio Interface mute */
 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
 
-/*
- * Digital Audio Interface.
- *
- * Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97
- * operations and capabilities. Codec and platform drivers will register this
- * structure for every DAI they have.
- *
- * This structure covers the clocking, formating and ALSA operations for each
- * interface.
- */
 struct snd_soc_dai_ops {
         /*
          * DAI clocking configuration, all optional.
@@ -191,24 +183,24 @@ struct snd_soc_dai_ops {
 };
 
 /*
- * Digital Audio Interface runtime data.
+ * Digital Audio Interface Driver.
  *
- * Holds runtime data for a DAI.
+ * Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97
+ * operations and capabilities. Codec and platform drivers will register this
+ * structure for every DAI they have.
+ *
+ * This structure covers the clocking, formating and ALSA operations for each
+ * interface.
  */
-struct snd_soc_dai {
+struct snd_soc_dai_driver {
         /* DAI description */
-        char *name;
+        const char *name;
         unsigned int id;
         int ac97_control;
 
-        struct device *dev;
-        void *ac97_pdata;       /* platform_data for the ac97 codec */
-
-        /* DAI callbacks */
-        int (*probe)(struct platform_device *pdev,
-                     struct snd_soc_dai *dai);
-        void (*remove)(struct platform_device *pdev,
-                       struct snd_soc_dai *dai);
+        /* DAI driver callbacks */
+        int (*probe)(struct snd_soc_dai *dai);
+        int (*remove)(struct snd_soc_dai *dai);
         int (*suspend)(struct snd_soc_dai *dai);
         int (*resume)(struct snd_soc_dai *dai);
 
@@ -219,26 +211,51 @@ struct snd_soc_dai {
         struct snd_soc_pcm_stream capture;
         struct snd_soc_pcm_stream playback;
         unsigned int symmetric_rates:1;
+};
+
+/*
+ * Digital Audio Interface runtime data.
+ *
+ * Holds runtime data for a DAI.
+ */
+struct snd_soc_dai {
+        const char *name;
+        int id;
+        struct device *dev;
+        void *ac97_pdata;       /* platform_data for the ac97 codec */
+
+        /* driver ops */
+        struct snd_soc_dai_driver *driver;
 
         /* DAI runtime info */
-        struct snd_soc_codec *codec;
+        unsigned int capture_active:1;          /* stream is in use */
+        unsigned int playback_active:1;         /* stream is in use */
+        unsigned int symmetric_rates:1;
+        struct snd_pcm_runtime *runtime;
         unsigned int active;
         unsigned char pop_wait:1;
+        unsigned char probed:1;
 
-        /* DAI private data */
-        void *private_data;
+        /* DAI DMA data */
+        void *playback_dma_data;
+        void *capture_dma_data;
 
-        /* parent platform */
-        struct snd_soc_platform *platform;
+        /* parent platform/codec */
+        union {
+                struct snd_soc_platform *platform;
+                struct snd_soc_codec *codec;
+        };
+        struct snd_soc_card *card;
 
         struct list_head list;
+        struct list_head card_list;
 };
 
 static inline void *snd_soc_dai_get_dma_data(const struct snd_soc_dai *dai,
                                              const struct snd_pcm_substream *ss)
 {
         return (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
-                dai->playback.dma_data : dai->capture.dma_data;
+                dai->playback_dma_data : dai->capture_dma_data;
 }
 
 static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
@@ -246,9 +263,20 @@ static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
                                             void *data)
 {
         if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
-                dai->playback.dma_data = data;
+                dai->playback_dma_data = data;
         else
-                dai->capture.dma_data = data;
+                dai->capture_dma_data = data;
+}
+
+static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai,
+                void *data)
+{
+        dev_set_drvdata(dai->dev, data);
+}
+
+static inline void *snd_soc_dai_get_drvdata(struct snd_soc_dai *dai)
+{
+        return dev_get_drvdata(dai->dev);
 }
 
 #endif