ec/google/wilco: Correct scope of UCSI ACPI device

Set the USCI device scope to _SB and set HID to USBC000 so Windows
driver attaches. This matches the ACPI used by the non-Chromebook
version of the Dell Latittude 7410 (which uses the same EC).

TEST=build/boot Win11 on google/drallion

Change-Id: If482fa4a4856c7bc085795bc72b35ebefe2f15c4
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77281
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: CoolStar <coolstarorganization@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/ec/google/wilco/acpi/ec.asl

@@ -50,7 +50,7 @@ Device (EC0)
 		}
 
 		/* Initialize UCSI */
-		^UCSI.INIT ()
+		\_SB.UCSI.INIT ()
 
 		// Initialize LID switch state
 		\LIDS = R (P1LC)

src/ec/google/wilco/acpi/ec_ram.asl

@@ -131,6 +131,11 @@ Name (DWTQ, Package () { 0x38, 0xff, WR })	/* DPTF: Write Trip Query */
 Name (CSOS, Package () { 0xb8, 0xff, WR })	/* OS support for S0ix */
 Name (CSEX, Package () { 0xb9, 0xff, WR })	/* OS enter(1)/exit(0) S0ix */
 
+Scope (\_SB)
+{
+	Name (RD, 0)
+	Name (WR, 1)
+
 	/*
 	 * EC UCSI
 	 */
@@ -181,3 +186,4 @@ Name (UMOD, Package () { 0xad, 0xff, WR })	/* UCSI Message Out */
 	Name (UMOE, Package () { 0xae, 0xff, WR })	/* UCSI Message Out */
 	Name (UMOF, Package () { 0xaf, 0xff, WR })	/* UCSI Message Out */
 	Name (UCTL, Package () { 0xb0, 0xff, WR })	/* UCSI Control Register */
+}

src/ec/google/wilco/acpi/event.asl

@@ -141,7 +141,7 @@ Method (_Q79, 0, Serialized)
 {
 	If (ISSX == 0) {
 		Printf ("EC _Q79 UCSI Event")
-		Notify (^UCSI, 0x80)
+		Notify (\_SB.UCSI, 0x80)
 		^UCEP = 0
 	} Else {
 		Printf ("EC _Q79 UCSI Event Masked in S0ix")

src/ec/google/wilco/acpi/ucsi.asl

@@ -1,12 +1,14 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+Scope (\_SB)
+{
 	Device (UCSI)
 	{
-	Name (_HID, "GOOG000E")
-	Name (_CID, EisaId ("PNP0CA0"))
+		Name (_HID, EisaId("USBC000"))
+		Name (_CID, Package { "GOOG000E", EisaId ("PNP0CA0") })
 		Name (_DDN, "Wilco EC UCSI")
 		Name (_UID, 1)
-	Name (_STA, 0xb)
+		Name (_STA, 0xf)
 
 		/* Value written to EC control register to start UCSI command */
 		Name (UCMD, 0xE0)
@@ -66,6 +68,15 @@ Device (UCSI)
 			^VER1 = R (^^UVR1)
 		}
 
+		Method (R, 1, Serialized, 2){
+			Local0 = \_SB.PCI0.LPCB.EC0.R(Arg0)
+			Return (Local0)
+		}
+
+		Method (W, 2, Serialized, 2){
+			\_SB.PCI0.LPCB.EC0.W(Arg0, Arg1)
+		}
+
 		Method (_DSM, 4, Serialized)
 		{
 			If (Arg0 != ToUUID ("6f8398c2-7ca4-11e4-ad36-631042b5008f")) {
@@ -141,3 +152,4 @@ Device (UCSI)
 			Return (Buffer (1) { 0 })
 		}
 	}
+}

src/ec/google/wilco/chip.c

@@ -196,7 +196,7 @@ static void wilco_ec_fill_ssdt_generator(const struct device *dev)
 	opreg.regionoffset = (uintptr_t)region_ptr;
 	opreg.regionlen = ucsi_alloc_region_len;
 
-	acpigen_write_scope(acpi_device_path_join(dev, "UCSI"));
+	acpigen_write_scope("\\_SB.UCSI");
 	acpigen_write_name("_CRS");
 	acpigen_write_resourcetemplate_header();
 	acpigen_write_mem32fixed(1, (uintptr_t)region_ptr, ucsi_region_len);