greybus: audio: Use single codec driver registration

We have single I2S port via APB1 for communication with all
audio modules. Thus, we should register single codec driver
and manage all individual audio modules internally within
this driver.
Signed-off-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Reviewed-by: Mark Greer <mark.greer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/audio_codec.h

@@ -68,6 +68,31 @@ static const u8 gbcodec_reg_defaults[GBCODEC_REG_COUNT] = {
 	GBCODEC_APB2_MUX_REG_DEFAULT,
 };
 
+enum gbaudio_codec_state {
+	GBAUDIO_CODEC_SHUTDOWN = 0,
+	GBAUDIO_CODEC_STARTUP,
+	GBAUDIO_CODEC_HWPARAMS,
+	GBAUDIO_CODEC_PREPARE,
+	GBAUDIO_CODEC_START,
+	GBAUDIO_CODEC_STOP,
+};
+
+struct gbaudio_stream {
+	const char *dai_name;
+	int state;
+	uint8_t sig_bits, channels;
+	uint32_t format, rate;
+};
+
+struct gbaudio_codec_info {
+	struct device *dev;
+	struct snd_soc_codec *codec;
+	struct list_head module_list;
+	struct gbaudio_stream stream[2];	/* PB/CAP */
+	struct mutex lock;
+	u8 reg[GBCODEC_REG_COUNT];
+};
+
 struct gbaudio_widget {
 	__u8 id;
 	const char *name;
@@ -81,81 +106,80 @@ struct gbaudio_control {
 	struct list_head list;
 };
 
-struct gbaudio_dai {
+struct gbaudio_data_connection {
 	__le16 data_cport;
+	int cport_configured;
 	char name[NAME_SIZE];
-	/* DAI users */
-	atomic_t users;
 	struct gb_connection *connection;
 	struct list_head list;
-	wait_queue_head_t wait_queue;
 };
 
-struct gbaudio_codec_info {
+/* stream direction */
+#define GB_PLAYBACK	BIT(0)
+#define GB_CAPTURE	BIT(1)
+
+enum gbaudio_module_state {
+	GBAUDIO_MODULE_OFF = 0,
+	GBAUDIO_MODULE_ON,
+};
+
+struct gbaudio_module_info {
 	/* module info */
+	struct device *dev;
 	int dev_id;	/* check if it should be bundle_id/hd_cport_id */
 	int vid;
 	int pid;
 	int slot;
 	int type;
-	int dai_added;
-	int codec_registered;
 	int set_uevent;
 	char vstr[NAME_SIZE];
 	char pstr[NAME_SIZE];
 	struct list_head list;
-	struct gb_audio_topology *topology;
 	/* need to share this info to above user space */
 	int manager_id;
 	char name[NAME_SIZE];
 
-	/*
-	 * there can be a rece condition between gb_audio_disconnect()
-	 * and dai->trigger from above ASoC layer.
-	 * To avoid any deadlock over codec_info->lock, atomic variable
-	 * is used.
-	 */
-	atomic_t is_connected;
+	/* used by codec_ops */
 	struct mutex lock;
+	int is_connected;
+	int ctrlstate[2];	/* PB/CAP */
 
-	/* soc related data */
-	struct snd_soc_codec *codec;
-	struct device *dev;
-	u8 reg[GBCODEC_REG_COUNT];
-
-	/* dai_link related */
-	char card_name[NAME_SIZE];
-	char *dailink_name[MAX_DAIS];
-	int num_dai_links;
-
+	/* connection info */
 	struct gb_connection *mgmt_connection;
 	size_t num_data_connections;
+	struct list_head data_list;
+
 	/* topology related */
 	int num_dais;
-	int num_kcontrols;
+	int num_controls;
 	int num_dapm_widgets;
 	int num_dapm_routes;
 	unsigned long dai_offset;
 	unsigned long widget_offset;
 	unsigned long control_offset;
 	unsigned long route_offset;
-	struct snd_kcontrol_new *kctls;
-	struct snd_soc_dapm_widget *widgets;
-	struct snd_soc_dapm_route *routes;
+	struct snd_kcontrol_new *controls;
+	struct snd_soc_dapm_widget *dapm_widgets;
+	struct snd_soc_dapm_route *dapm_routes;
 	struct snd_soc_dai_driver *dais;
 
-	/* lists */
-	struct list_head dai_list;
 	struct list_head widget_list;
-	struct list_head codec_ctl_list;
+	struct list_head ctl_list;
 	struct list_head widget_ctl_list;
+
+	struct gb_audio_topology *topology;
 };
 
-struct gbaudio_dai *gbaudio_find_dai(struct gbaudio_codec_info *gbcodec,
-				     int data_cport, const char *name);
-int gbaudio_tplg_parse_data(struct gbaudio_codec_info *gbcodec,
+int gbaudio_tplg_parse_data(struct gbaudio_module_info *module,
 			       struct gb_audio_topology *tplg_data);
-void gbaudio_tplg_release(struct gbaudio_codec_info *gbcodec);
+void gbaudio_tplg_release(struct gbaudio_module_info *module);
+
+int gbaudio_module_update(struct gbaudio_codec_info *codec,
+				 const char *w_name,
+				 struct gbaudio_module_info *module,
+				 int enable);
+int gbaudio_register_module(struct gbaudio_module_info *module);
+void gbaudio_unregister_module(struct gbaudio_module_info *module);
 
 /* protocol related */
 extern int gb_audio_gb_get_topology(struct gb_connection *connection,