diff options
| author | John Zhao <john.zhao@intel.com> | 2020-06-24 23:08:01 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-07-01 05:20:50 +0000 |
| commit | c47e3147539a5e91a95a83ba2cd10e9b98039b24 (patch) | |
| tree | 176db9da227fe1e0aee9d0ee0f8804dba509580f /src | |
| parent | a65afdb833741735cf2cdf1386a9a2d065de6065 (diff) | |
| download | coreboot-c47e3147539a5e91a95a83ba2cd10e9b98039b24.tar.xz | |
soc/intel/tigerlake: Add platform wide _OSC capabilities for USB4
This change adds Platform-Wide _OSC capabilities for native USB4
support. There is Engineering Change Request (ECR) with _OSC addition
for OSPM USB support. ACPI section 6.2.11.1.13 is modified with bit 18
as native USB4 support. The OS sets this bit to indicate support for
an OSPM-native USB4 Connection Manager which handles USB4 connection
events and link management. The OS use the _OSC mechanism and the bit
defined in this ECR to obtain configuration and connection management
capabilities of USB4 connections. This change also fixs the byte index
for the DWord-addressable field CDW3 from the capabilities buffer.
BUG=b:140645231
TEST=Check Type C device all ports connection/enumeration with SW CM.
Signed-off-by: John Zhao <john.zhao@intel.com>
Change-Id: I1b561ea5a0a6b440cca3152cc150f31abf7766ad
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42821
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/tigerlake/acpi/tcss.asl | 66 |
1 files changed, 41 insertions, 25 deletions
diff --git a/src/soc/intel/tigerlake/acpi/tcss.asl b/src/soc/intel/tigerlake/acpi/tcss.asl index 3f51ecc8c1..3312b597b5 100644 --- a/src/soc/intel/tigerlake/acpi/tcss.asl +++ b/src/soc/intel/tigerlake/acpi/tcss.asl @@ -139,38 +139,54 @@ Scope (\_SB) Method (_OSC, 4, Serialized) { - /* - * Operating System Capabilities for USB4 - * Arg0: UUID = {23A0D13A-26AB-486C-9C5F-0FFA525A575A} - * Arg1: Revision ID = 1 - * Arg2: Count of entries (DWORD) in Arg3 (Integer): 3 - * Arg3: DWORD capabilities buffer: - * First DWORD: The standard definition bits are used to return errors. - * Second DWORD: OSPM support field for USB4, bits [31:0] reserved. - * Third DWORD: OSPM control field for USB4. - * bit 0: USB tunneling - * bit 1: DisplayPort tunneling - * bit 2: PCIe tunneling - * bit 3: Inter-domain USB4 internet protocol - * bit 31:4: reserved - * Return: The platform acknowledges the capabilities buffer by returning - * a buffer of DWORD of the same length. Masked/Cleared bits in the - * control field indicate that the platform does not permit OSPM - * control of the respectively capabilities or features. - */ - Name (CTRL, 0) /* Control field value */ CreateDWordField (Arg3, 0, CDW1) - If (Arg0 == ToUUID("23A0D13A-26AB-486C-9C5F-0FFA525A575A")) { - CreateDWordField (Arg3, 2, CDW3) - CTRL = CDW3 + If (Arg0 == ToUUID("0811B06E-4A27-44F9-8D60-3CBBC22E7B48")) { + /* Platform-Wide _OSC Capabilities + * Arg0: UUID = {0811B06E-4A27-44F9-8D60-3CBBC22E7B48} + * Arg1: Revision ID = 1 + * Arg2: Count of entries (DWORD) in Arge3 (Integer): 3 + * Arg3: DWORD capabilities buffer: + * First DWORD: The standard definition bits are used to return errors. + * Second DWORD: See ACPI specification Platform-Wide _OSC Capabilities + * DWORD2 table for Bits 0-17. Bit 18 is newly defined as native USB4 + * support. The OS sets this bit to indicate support for an OSPM-native + * USB4 Connection Manager which handles USB4 connection events and + * link management. + */ + If (Arg1 != REVISION_ID) { + CDW1 |= UNRECOGNIZED_REVISION + } + Return (Arg3) + } ElseIf (Arg0 == ToUUID("23A0D13A-26AB-486C-9C5F-0FFA525A575A")) { + /* + * Operating System Capabilities for USB4 + * Arg0: UUID = {23A0D13A-26AB-486C-9C5F-0FFA525A575A} + * Arg1: Revision ID = 1 + * Arg2: Count of entries (DWORD) in Arg3 (Integer): 3 + * Arg3: DWORD capabilities buffer: + * First DWORD: The standard definition bits are used to return errors. + * Second DWORD: OSPM support field for USB4, bits [31:0] reserved. + * Third DWORD: OSPM control field for USB4. + * bit 0: USB tunneling + * bit 1: DisplayPort tunneling + * bit 2: PCIe tunneling + * bit 3: Inter-domain USB4 internet protocol + * bit 31:4: reserved + * Return: The platform acknowledges the capabilities buffer by + * returning a buffer of DWORD of the same length. Masked/Cleared bits + * in the control field indicate that the platform does not permit OSPM + * control of the respectively capabilities or features. + */ + CreateDWordField (Arg3, 8, CDW3) + Local0 = CDW3 If (Arg1 != REVISION_ID) { CDW1 |= UNRECOGNIZED_REVISION Return (Arg3) } - CTRL |= USB_TUNNELING | DISPLAY_PORT_TUNNELING | PCIE_TUNNELING | + Local0 |= USB_TUNNELING | DISPLAY_PORT_TUNNELING | PCIE_TUNNELING | INTER_DOMAIN_USB4_INTERNET_PROTOCOL - CDW3 = CTRL + CDW3 = Local0 Return (Arg3) } Else { CDW1 |= UNRECOGNIZED_UUID |