diff options
Diffstat (limited to 'src/soc/intel/common')
| -rw-r--r-- | src/soc/intel/common/acpi/xhci_wake.asl | 49 | ||||
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/xhci.h | 7 |
2 files changed, 56 insertions, 0 deletions
diff --git a/src/soc/intel/common/acpi/xhci_wake.asl b/src/soc/intel/common/acpi/xhci_wake.asl new file mode 100644 index 0000000000..e029a6f05c --- /dev/null +++ b/src/soc/intel/common/acpi/xhci_wake.asl @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <intelblocks/xhci.h> + +/* + * USB Port Wake Enable (UPWE) on usb attach/detach + * Arg0 - Port Number + * Arg1 - Port 1 Status and control offset + * Arg2 - xHCI Memory-mapped address + */ +Method (UPWE, 3, Serialized) +{ + Local0 = Arg1 + ((Arg0 - 1) * 0x10) + + /* Map ((XMEM << 16) + Local0 in PSCR */ + OperationRegion (PSCR, SystemMemory, (Arg2 << 16) + Local0, 0x10) + Field (PSCR, DWordAcc, NoLock, Preserve) + { + PSCT, 32, + } + Local0 = PSCT + Local0 &= PORTSCN_BITS_OFF_MASK + Local0 |= PORTSCN_WAKE_ON_BOTH_CONNECT_DISCONNECT_ENABLE + PSCT = Local0 +} + +/* + * USB Wake Enable Setup (UWES) + * Arg0 - Port enable bitmap + * Arg1 - Port 1 Status and control offset + * Arg2 - xHCI Memory-mapped address + */ +Method (UWES, 3, Serialized) +{ + Local0 = Arg0 + + While (1) { + FindSetRightBit (Local0, Local1) + If (Local1 == 0) { + Break + } + UPWE (Local1, Arg1, Arg2) + /* + * Clear the lowest set bit in Local0 since it was + * processed. + */ + Local0 &= (Local0 - 1) + } +} diff --git a/src/soc/intel/common/block/include/intelblocks/xhci.h b/src/soc/intel/common/block/include/intelblocks/xhci.h index 15b16d2073..1a72e0fee8 100644 --- a/src/soc/intel/common/block/include/intelblocks/xhci.h +++ b/src/soc/intel/common/block/include/intelblocks/xhci.h @@ -16,6 +16,13 @@ #define PORTSCN_BITS_OFF_MASK ~0x80FE0012 #define PORTSCXUSB3_OFFSET 0x540 +/* + * Set bit corresponding to USB port in wake enable bitmap. Bit 0 corresponds + * to Port 1, Bit n corresponds to Port (n+1). This bitmap is later used to + * decide what ports need to set PORTSCN/PORTSCXUSB3 register bits. + */ +#define USB_PORT_WAKE_ENABLE(x) (1 << ((x) - 1)) + #if !defined(__ACPI__) #include <device/device.h> #include <device/xhci.h> |