util: Add hda-decoder

This tool helps take off the burden of manually decoding default
configuration registers. Using decoded values can make code more
self-documenting compared to shrouding it with magic numbers.

This is also written as a module which allows easy integration with
other tools written in Go (e.g. autoport).

Change-Id: Ib4fb652e178517b2b7aceaac8be005c5b2d3b03e
Signed-off-by: Nicholas Sudsgaard <devel+coreboot@nsudsgaard.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80470
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

util/hda-decoder/decoder/lib_test.go

@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0-only
+package decoder
+
+import (
+	"reflect"
+	"testing"
+)
+
+type portIsConnectedTest struct {
+	arg1     uint32
+	expected bool
+}
+
+var portIsConnectedTests = []portIsConnectedTest{
+	portIsConnectedTest{0x20000000, true},
+	portIsConnectedTest{0xC0000000, true},
+	portIsConnectedTest{0x40000000, false},
+}
+
+func TestPortIsConnected(t *testing.T) {
+	for _, test := range portIsConnectedTests {
+		output := PortIsConnected(test.arg1)
+		if output != test.expected {
+			t.Errorf("Expected %v, received %v", test.expected, output)
+		}
+	}
+}
+
+type decodeTest struct {
+	arg1     uint32
+	expected Fields[uint32]
+}
+
+var decodeTests = []decodeTest{
+	decodeTest{0xe23d1a0e, Fields[uint32]{0x3, 0x22, 0x3, 0xd, 0x1, 0xa, 0x0, 0xe}},
+	decodeTest{0x66a8a2e4, Fields[uint32]{0x1, 0x26, 0xa, 0x8, 0xa, 0x2, 0xe, 0x4}},
+	decodeTest{0x2e00a164, Fields[uint32]{0x0, 0x2e, 0x0, 0x0, 0xa, 0x1, 0x6, 0x4}},
+	decodeTest{0x3b83dfe9, Fields[uint32]{0x0, 0x3b, 0x8, 0x3, 0xd, 0xf, 0xe, 0x9}},
+	decodeTest{0x51708701, Fields[uint32]{0x1, 0x11, 0x7, 0x0, 0x8, 0x7, 0x0, 0x1}},
+}
+
+func TestDecode(t *testing.T) {
+	for _, test := range decodeTests {
+		output := Decode(test.arg1)
+		if !reflect.DeepEqual(output, test.expected) {
+			t.Errorf("Expected %v, received %v", test.expected, output)
+		}
+	}
+}
+
+type toHumanReadableTest struct {
+	arg1     uint32
+	expected Fields[string]
+}
+
+var toHumanReadableTests = []toHumanReadableTest{
+	toHumanReadableTest{0xe23d1a0e, Fields[string]{
+		"AZALIA_JACK_AND_INTEGRATED",
+		"AZALIA_SEPARATE_CHASSIS | AZALIA_FRONT",
+		"AZALIA_CD",
+		"0xd",
+		"AZALIA_BLACK",
+		"AZALIA_JACK_PRESENCE_DETECT | 0xa",
+		"0",
+		"14",
+	}},
+
+	toHumanReadableTest{0x57708701, Fields[string]{
+		"AZALIA_NC",
+		"AZALIA_RISER",
+		"AZALIA_MODEM_HANDSET_SIDE",
+		"AZALIA_TYPE_UNKNOWN",
+		"AZALIA_PURPLE",
+		"AZALIA_NO_JACK_PRESENCE_DETECT | 0x6",
+		"0",
+		"1",
+	}},
+
+	toHumanReadableTest{0x2e00a164, Fields[string]{
+		"AZALIA_JACK",
+		"AZALIA_SEPARATE_CHASSIS | 0xe",
+		"AZALIA_LINE_OUT",
+		"AZALIA_TYPE_UNKNOWN",
+		"0xa",
+		"AZALIA_NO_JACK_PRESENCE_DETECT",
+		"6",
+		"4",
+	}},
+
+	toHumanReadableTest{0x80949653, Fields[string]{
+		"AZALIA_INTEGRATED",
+		"AZALIA_EXTERNAL_PRIMARY_CHASSIS",
+		"AZALIA_AUX",
+		"AZALIA_RCA",
+		"AZALIA_PINK",
+		"AZALIA_JACK_PRESENCE_DETECT | 0x6",
+		"5",
+		"3",
+	}},
+}
+
+func TestToHumanReadable(t *testing.T) {
+	for _, test := range toHumanReadableTests {
+		output := ToHumanReadable(Decode(test.arg1))
+		if output != test.expected {
+			t.Errorf("Expected %v, received %v", test.expected, output)
+		}
+	}
+}