soc/baytrail: add ACPI method to generate USB port info
Add ACPI method GPLD to generate port location data when
passed visiblity info. Will be used by _PLD method in
board-specific USB .asl files.
Change-Id: Iad947ae2cd541d3407455b218c2b352b9a373718
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/19973
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/baytrail/acpi/xhci.asl b/src/soc/intel/baytrail/acpi/xhci.asl
index bef0b9f..d3c0083 100644
--- a/src/soc/intel/baytrail/acpi/xhci.asl
+++ b/src/soc/intel/baytrail/acpi/xhci.asl
@@ -23,6 +23,23 @@
Device (RHUB)
{
Name (_ADR, 0x00000000)
+
+ // GPLD: Generate Port Location Data (PLD)
+ Method (GPLD, 1, Serialized) {
+ Name (PCKG, Package (0x01) {
+ Buffer (0x10) {}
+ })
+
+ // REV: Revision 0x02 for ACPI 5.0
+ CreateField (DerefOf (Index (PCKG, Zero)), Zero, 0x07, REV)
+ Store (0x02, REV)
+
+ // VISI: Port visibility to user per port
+ CreateField (DerefOf (Index (PCKG, Zero)), 0x40, One, VISI)
+ Store (Arg0, VISI)
+ Return (PCKG)
+ }
+
Device (PRT1) { Name (_ADR, 1) }
Device (PRT2) { Name (_ADR, 2) }
Device (PRT3) { Name (_ADR, 3) }