diff options
| -rw-r--r-- | src/mainboard/google/rex/variants/rex0/include/variant/acpi/hid_spi_elan.asl | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/mainboard/google/rex/variants/rex0/include/variant/acpi/hid_spi_elan.asl b/src/mainboard/google/rex/variants/rex0/include/variant/acpi/hid_spi_elan.asl new file mode 100644 index 0000000000..cc8cb935a5 --- /dev/null +++ b/src/mainboard/google/rex/variants/rex0/include/variant/acpi/hid_spi_elan.asl @@ -0,0 +1,152 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* + * ELAN7B18UH - HID over SPI + * See "HID Over SPI Protocol Specification" section 5.2 - ACPI enum + * https://www.microsoft.com/en-us/download/details.aspx?id=103325 + + * NOTES: + * 1. Make sure TOUCH_SCR_IRQ is defined according to the board's schematics + * 2. Include this file under the scope for the correct SPI, e.g.: + * Scope (\_SB.PCI0.SPI0) + * { + * #include <variant/acpi/hid_spi_elan.asl> + * } + */ + +Device(TCSC) { + Name (_HID, "ELAN9006") /* VendorID + DeviceID - <VVVVdddd> */ + Name (_CID, "PNP0C51") /* Compatible ID - PNP0C51 */ + Name (_SUB, "ELAN0732") /* SubVendorID + SubSystemID - <VVVVssss> */ + Name (_HRV, 0x0001) /* Hardware Revision Number - 2 bytes */ + + Method (_STA, 0) + { + Return (0xf) + } + + Name (_CRS, ResourceTemplate () { + SpiSerialBusV2 ( + 0, /* DeviceSelection */ + PolarityLow, /* DeviceSelectionPolarity */ + FourWireMode, /* WireMode */ + 8, /* DataBitLength */ + ControllerInitiated, /* SlaveMode */ + 0x0B71B00, /* ConnectionSpeed (12MHz) */ + ClockPolarityLow, /* ClockPolarity */ + ClockPhaseFirst, /* ClockPhase */ + "\\_SB.PCI0.SPI0", /* ResourceSource */ + 0, /* ResourceSourceIndex */ + ResourceConsumer, /* ResourceUsage */ + ) + Interrupt(ResourceConsumer, Level, ActiveLow, Shared) + { + TOUCH_SCR_IRQ + } + }) + + /* _DSM - Device-Specific Method */ + /* Arg0: UUID Unique function identifier */ + /* Arg1: Integer Revision ID - Will be 3 for HidSpi V1 */ + /* Arg2: Integer Function Index (0 = Return Supported Functions) */ + /* Arg3: Package Parameters */ + + Method (_DSM, 4) { + /* HIDSPI UUID */ + If(Arg0 == ToUUID("6E2AC436-0FCF-41AF-A265-B32A220DCFAB")) { + + /* Switch on the function index */ + switch(ToInteger(Arg2)) { + case(0) { + /* Switch on the revision level */ + switch(ToInteger(Arg1)) { + case (3) { + /* HidSpi v1: Functions 0-6 */ + Return(Buffer(One) { 0x7F }) + } + default { + /* Unsupported revision */ + Return(Buffer(One) { 0x00 }) + } + } + } + case(1) { + /* Elan Input Report Header address - 0x1000*/ + Return (0x1000) + } + case(2) { + /* Elan Input Report Body address - 0x1100*/ + Return (0x1100) + } + case(3) { + /* Elan Output Report Header address - 0x2000 */ + Return (0x2000) + } + case(4) { + /* Read opcode */ + Return (Buffer(1) {0x0B}) + } + case(5) { + /* Write opcode */ + Return (Buffer(1) {0x02}) + } + case(6) { + /* Flags */ + Return (0x0000) + } + default { + /* Unsupported function index */ + Return (Buffer() {0}) + } + } + } + else { + /* No functions are supported for this UUID. */ + return (Buffer() {0}) + } + } + + Method(_RST, 0, Serialized) { + /* De-assert the reset signal for 20ms */ + CTXS(GPP_C01) + Sleep(20) + STXS(GPP_C01) + } + + Name (_PR0, Package (0x01) /* Power Resources for D0 */ + { + PR00 + }) + + Name (_PR3, Package (0x01) /* Power Resources for D3hot */ + { + PR00 + }) + + PowerResource (PR00, 0x00, 0x0000) + { + Method (_STA, 0, NotSerialized) /* Status */ + { + Return (1) + } + + Method (_ON, 0, Serialized) /* Power On */ + { + CTXS (GPP_C01) + STXS (GPP_C00) + Sleep (1) + STXS (GPP_C01) + Sleep (20) + STXS (GPP_C06) + } + + Method (_OFF, 0, Serialized) /* Power Off */ + { + CTXS (GPP_C06) + Sleep (2) + CTXS (GPP_C01) + Sleep (2) + CTXS (GPP_C00) + } + } +} |