topology2: Add DAI widget class

Add the class definition for DAI widgets. A DAI widget
can be instantiated as follows:
Object.Widget.dai."playback" {
	type			SSP
	index			"1"
	period_sink_count	"2"
	period_source_count	"0"
	widget_type		"dai_in"
}

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

tools/topology2/include/common/tokens.conf

@@ -12,4 +12,12 @@ Object.Base.VendorToken {
 		core_id		404
 		uuid			405
 	}
+
+	"sof_tkn_dai" {
+		# Token retired with ABI 3.2, do not use for new capabilities
+		dmac_config			153
+		dai_type			154
+		dai_index			155
+		direction			156
+	}
 }

tools/topology2/include/components/dai.conf

@@ -0,0 +1,137 @@
+#
+# A generic dai widget. All attributes defined herein are namespaced
+# by alsatplg to "Object.Widget.dai.N.attribute_name"
+#
+# For playback
+# 	Object.Widget.dai."playback" {
+#		dai_type		SSP
+#		index			1
+#		period_sink_count	2
+#		period_source_count	0
+#		type			dai_in
+#	}
+#
+# For Capture
+# 	Object.Widget.dai."capture" {
+#		dai_type		SSP
+#		index			2
+#		period_sink_count	0
+#		period_source_count	2
+#		type			dai_out
+#	}
+#
+
+Class.Widget."dai" {
+	# Type of DAI
+	DefineAttribute."dai_type" {
+		type	"string"
+		token_ref	"sof_tkn_dai.string"
+		constraints {
+			!valid_values [
+				"SSP"
+				"DMIC"
+				"HDA"
+				"ALH"
+				"ESAI"
+			]
+		}
+	}
+
+	DefineAttribute."instance" {}
+
+	# DAI Index in the firmware
+	DefineAttribute."dai_index" {
+		# Token reference and type
+		token_ref	"sof_tkn_dai.word"
+	}
+
+	#
+	# DAI direction. The string values will be converted to 0/1 and added as tuple data
+	#
+	DefineAttribute."direction" {
+		type	"string"
+		token_ref	"sof_tkn_dai.word"
+		constraints {
+			!valid_values [
+				"playback"
+				"capture"
+			]
+			!tuple_values [
+				0
+				1
+			]
+		}
+	}
+
+	# include common widget attribute definitions
+	<include/components/widget-common.conf>
+
+	#
+	# Pipeline ID that the dai widget belongs to
+	#
+	DefineAttribute."index" {}
+
+	DefineAttribute.uuid {
+		type	"string"
+		# Token set reference name and type
+		token_ref	"sof_tkn_comp.uuid"
+	}
+
+	# Bespoke attributes for DAI
+	DefineAttribute."format" {
+		type	"string"
+		# Token reference and type
+		token_ref	"sof_tkn_comp.string"
+	}
+
+	# Attribute categories
+	attributes {
+		#
+		# The DAI widget name would be constructed using the dai_type, index and direction
+		# attributes. For ex: "dai.SSP.1.capture" or "dai.ALH.2.playback" etc.
+		#
+		!constructor [
+			"dai_type"
+			"dai_index"
+			"direction"
+		]
+
+		#
+		# mandatory attributes that must be provided when the dai widget class is instantiated
+		#
+		!mandatory [
+			"type"
+			"stream_name"
+			"format"
+			"index"
+			"period_sink_count"
+			"period_source_count"
+			"format"
+		]
+
+		#
+		# immutable attributes cannot be modified in the object instance
+		#
+		!immutable [
+			"uuid"
+		]
+
+		#
+		# deprecated attributes should not be added in the object instance
+		#
+		!deprecated [
+			"preload_count"
+		]
+
+		#
+		# dai widget objects instantiated within the same alsaconf node must have unique
+		# direction attribute
+		#
+		unique	"instance"
+	}
+
+	# Default attribute values for DAI widget
+	uuid "27:0d:b0:c2:bc:ff:50:41:a5:1a:24:5c:79:c5:e5:4b"
+	no_pm		"true"
+	core_id 	0
+}