Some minor SDCA preparation

Merge series from Charles Keepax <ckeepax@opensource.cirrus.com>:

Make some small fixups and add some minor missing features that will be
needed for the next major part of the SDCA work. This series doesn't do
a lot on its own, but as the next series will add all the ALSA control
and DAPM graph creation it's probably best to get these minor things out
of the way to simplify review on the bigger stuff.

1 files changed, 90 insertions, 0 deletions

diff --git a/include/sound/sdca_function.h b/include/sound/sdca_function.h
index f001ab643fed..253654568a41 100644
--- a/include/sound/sdca_function.h
+++ b/include/sound/sdca_function.h
@@ -44,6 +44,11 @@ struct sdca_function_desc;
  */
 #define SDCA_MAX_DELAY_COUNT 256
 
+/*
+ * Sanity check on size of affected controls data, can be expanded if needed.
+ */
+#define SDCA_MAX_AFFECTED_COUNT 2048
+
 /**
  * enum sdca_function_type - SDCA Function Type codes
  * @SDCA_FUNCTION_TYPE_SMART_AMP: Amplifier with protection features.
@@ -601,6 +606,27 @@ enum sdca_entity0_controls {
 #define SDCA_CTL_DEVICE_SDCA_VERSION_NAME		"Device SDCA Version"
 
 /**
+ * enum sdca_control_datatype - SDCA Control Data Types
+ *
+ * Data Types as described in the SDCA specification v1.0 section
+ * 7.3.
+ */
+enum sdca_control_datatype {
+	SDCA_CTL_DATATYPE_ONEBIT,
+	SDCA_CTL_DATATYPE_INTEGER,
+	SDCA_CTL_DATATYPE_SPEC_ENCODED_VALUE,
+	SDCA_CTL_DATATYPE_BCD,
+	SDCA_CTL_DATATYPE_Q7P8DB,
+	SDCA_CTL_DATATYPE_BYTEINDEX,
+	SDCA_CTL_DATATYPE_POSTURENUMBER,
+	SDCA_CTL_DATATYPE_DP_INDEX,
+	SDCA_CTL_DATATYPE_BITINDEX,
+	SDCA_CTL_DATATYPE_BITMAP,
+	SDCA_CTL_DATATYPE_GUID,
+	SDCA_CTL_DATATYPE_IMPDEF,
+};
+
+/**
  * enum sdca_access_mode - SDCA Control access mode
  *
  * Access modes as described in the SDCA specification v1.0 section
@@ -653,6 +679,7 @@ struct sdca_control_range {
  * @cn_list: A bitmask showing the valid Control Numbers within this Control,
  * Control Numbers typically represent channels.
  * @range: Buffer describing valid range of values for the Control.
+ * @type: Format of the data in the Control.
  * @mode: Access mode of the Control.
  * @layers: Bitmask of access layers of the Control.
  * @deferrable: Indicates if the access to the Control can be deferred.
@@ -669,6 +696,7 @@ struct sdca_control {
 	u64 cn_list;
 
 	struct sdca_control_range range;
+	enum sdca_control_datatype type;
 	enum sdca_access_mode mode;
 	u8 layers;
 
@@ -905,10 +933,50 @@ enum sdca_entity_type {
 };
 
 /**
+ * struct sdca_ge_control - control entry in the affected controls list
+ * @id: Entity ID of the Control affected.
+ * @sel: Control Selector of the Control affected.
+ * @cn: Control Number of the Control affected.
+ * @val: Value written to Control for this Mode.
+ */
+struct sdca_ge_control {
+	int id;
+	int sel;
+	int cn;
+	int val;
+};
+
+/**
+ * struct sdca_ge_mode - mode entry in the affected controls list
+ * @controls: Dynamically allocated array of controls written for this Mode.
+ * @num_controls: Number of controls written in this Mode.
+ * @val: GE Selector Mode value.
+ */
+struct sdca_ge_mode {
+	struct sdca_ge_control *controls;
+	int num_controls;
+	int val;
+};
+
+/**
+ * struct sdca_entity_ge - information specific to Group Entities
+ * @kctl: ALSA control pointer that can be used by linked Entities.
+ * @modes: Dynamically allocated array of Modes and the Controls written
+ * in each mode.
+ * @num_modes: Number of Modes.
+ */
+struct sdca_entity_ge {
+	struct snd_kcontrol_new *kctl;
+	struct sdca_ge_mode *modes;
+	int num_modes;
+};
+
+/**
  * struct sdca_entity - information for one SDCA Entity
  * @label: String such as "OT 12".
  * @id: Identifier used for addressing.
  * @type: Type code for the Entity.
+ * @group: Pointer to Group Entity controlling this one, NULL if N/A.
  * @sources: Dynamically allocated array pointing to each input Entity
  * connected to this Entity.
  * @controls: Dynamically allocated array of Controls.
@@ -917,12 +985,14 @@ enum sdca_entity_type {
  * @iot: Input/Output Terminal specific Entity properties.
  * @cs: Clock Source specific Entity properties.
  * @pde: Power Domain Entity specific Entity properties.
+ * @ge: Group Entity specific Entity properties.
  */
 struct sdca_entity {
 	const char *label;
 	int id;
 	enum sdca_entity_type type;
 
+	struct sdca_entity *group;
 	struct sdca_entity **sources;
 	struct sdca_control *controls;
 	int num_sources;
@@ -931,6 +1001,7 @@ struct sdca_entity {
 		struct sdca_entity_iot iot;
 		struct sdca_entity_cs cs;
 		struct sdca_entity_pde pde;
+		struct sdca_entity_ge ge;
 	};
 };
 
@@ -1113,6 +1184,25 @@ struct sdca_function_data {
 	unsigned int busy_max_delay;
 };
 
+static inline u32 sdca_range(struct sdca_control_range *range,
+			     unsigned int col, unsigned int row)
+{
+	return range->data[(row * range->cols) + col];
+}
+
+static inline u32 sdca_range_search(struct sdca_control_range *range,
+				    int search_col, int value, int result_col)
+{
+	int i;
+
+	for (i = 0; i < range->rows; i++) {
+		if (sdca_range(range, search_col, i) == value)
+			return sdca_range(range, result_col, i);
+	}
+
+	return 0;
+}
+
 int sdca_parse_function(struct device *dev,
 			struct sdca_function_desc *desc,
 			struct sdca_function_data *function);