From 33b2fb93bbf368b7b34fa9bd5de7f9edeb55ad11 Mon Sep 17 00:00:00 2001
From: Nicholas Sudsgaard <devel+coreboot@nsudsgaard.com>
Date: Sat, 5 Oct 2024 05:25:51 +0000
Subject: util/hda-decoder: Add feature to print configuration defaults as
 verbs

This feature simply goes through pin configurations stored in a file and
converts them into their corresponding verbs. This can be useful when
trying to find verb data stored inside a binary (e.g. when reverse
engineering).

Input:
	0x16 0x04211040
	0x17 0x91170110
	0x18 0x40f001f0

Output:
	address: 0, node ID: 0x16, configuration default: 0x04211040
	  0x01671c40
	  0x01671d10
	  0x01671e21
	  0x01671f04
	address: 0, node ID: 0x17, configuration default: 0x91170110
	  0x01771c10
	  0x01771d01
	  0x01771e17
	  0x01771f91
	address: 0, node ID: 0x18, configuration default: 0x40f001f0
	  0x01871cf0
	  0x01871d01
	  0x01871ef0
	  0x01871f40

Change-Id: I1fb74ff4b2b654987fd25ee32d0f94e5f2f783e3
Signed-off-by: Nicholas Sudsgaard <devel+coreboot@nsudsgaard.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84669
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 util/hda-decoder/decoder/lib.go      |  9 +++++++++
 util/hda-decoder/decoder/lib_test.go | 39 ++++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)

(limited to 'util/hda-decoder/decoder')

diff --git a/util/hda-decoder/decoder/lib.go b/util/hda-decoder/decoder/lib.go
index 834e83044c..445b8616f2 100644
--- a/util/hda-decoder/decoder/lib.go
+++ b/util/hda-decoder/decoder/lib.go
@@ -177,3 +177,12 @@ func ToHumanReadable(fields Fields[uint32]) Fields[string] {
 		Sequence:           fmt.Sprintf("%d", fields.Sequence),
 	}
 }
+
+func ConfigToVerbs(address uint32, nodeId uint32, config uint32) [4]uint32 {
+	return [4]uint32{
+		(address << 28) | (nodeId << 20) | (0x71c << 8) | ((config >> 0) & 0xff),
+		(address << 28) | (nodeId << 20) | (0x71d << 8) | ((config >> 8) & 0xff),
+		(address << 28) | (nodeId << 20) | (0x71e << 8) | ((config >> 16) & 0xff),
+		(address << 28) | (nodeId << 20) | (0x71f << 8) | ((config >> 24) & 0xff),
+	}
+}
diff --git a/util/hda-decoder/decoder/lib_test.go b/util/hda-decoder/decoder/lib_test.go
index 045c0fced9..4893fd34b8 100644
--- a/util/hda-decoder/decoder/lib_test.go
+++ b/util/hda-decoder/decoder/lib_test.go
@@ -107,3 +107,42 @@ func TestToHumanReadable(t *testing.T) {
 		}
 	}
 }
+
+type configToVerbsTest struct {
+	arg1     uint32
+	arg2     uint32
+	arg3     uint32
+	expected [4]uint32
+}
+
+var configToVerbsTests = []configToVerbsTest{
+	configToVerbsTest{
+		0, 0x19, 0x1cc3efde,
+		[4]uint32{0x01971cde, 0x01971def, 0x01971ec3, 0x01971f1c},
+	},
+	configToVerbsTest{
+		9, 0x4e, 0x913ddc4c,
+		[4]uint32{0x94e71c4c, 0x94e71ddc, 0x94e71e3d, 0x94e71f91},
+	},
+	configToVerbsTest{
+		12, 0xf4, 0x4193db3a,
+		[4]uint32{0xcf471c3a, 0xcf471ddb, 0xcf471e93, 0xcf471f41},
+	},
+	configToVerbsTest{
+		7, 0xb7, 0x0c39e09a,
+		[4]uint32{0x7b771c9a, 0x7b771de0, 0x7b771e39, 0x7b771f0c},
+	},
+	configToVerbsTest{
+		3, 0x5a, 0x24c04c66,
+		[4]uint32{0x35a71c66, 0x35a71d4c, 0x35a71ec0, 0x35a71f24},
+	},
+}
+
+func TestConfigToVerbs(t *testing.T) {
+	for _, test := range configToVerbsTests {
+		output := ConfigToVerbs(test.arg1, test.arg2, test.arg3)
+		if output != test.expected {
+			t.Errorf("Expected %#08x, received %#08x", test.expected, output)
+		}
+	}
+}
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