diff options
Diffstat (limited to 'src/ec/google/wilco/acpi/ec.asl')
-rw-r--r-- | src/ec/google/wilco/acpi/ec.asl | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/ec/google/wilco/acpi/ec.asl b/src/ec/google/wilco/acpi/ec.asl new file mode 100644 index 0000000000..8197c549a7 --- /dev/null +++ b/src/ec/google/wilco/acpi/ec.asl @@ -0,0 +1,137 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 Google LLC + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of + * the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +Device (EC0) +{ + Name (_HID, EisaId ("PNP0C09")) + Name (_UID, 1) + Name (_GPE, EC_SCI_GPI) + Name (_STA, 0xf) + + Name (_CRS, ResourceTemplate() { + IO (Decode16, + CONFIG_EC_BASE_ACPI_DATA, + CONFIG_EC_BASE_ACPI_DATA, + 4, 4) + IO (Decode16, + CONFIG_EC_BASE_ACPI_COMMAND, + CONFIG_EC_BASE_ACPI_COMMAND, + 4, 4) + }) + + /* Handle registration of EmbeddedControl region */ + Name (EREG, Zero) + OperationRegion (ERAM, EmbeddedControl, 0, 0xff) + Method (_REG, 2) + { + /* Indicate region is registered */ + EREG = Arg1 + + /* Store initial value for power status */ + ECPR = R (APWR) + + /* Indicate to EC that OS is ready for queries */ + W (ERDY, One) + + /* Tell EC to stop emulating PS/2 mouse */ + W (PS2M, Zero) + } + + /* + * Find bitmask for field + * Arg0 = EC field structure + * Arg1 = Value + */ + Method (EBIT, 2, NotSerialized) + { + Local0 = DeRefOf (Arg0[1]) /* Mask */ + Local1 = Arg1 & Local0 + FindSetRightBit (Local0, Local2) + If (Local2) { + Local1 >>= Local2 - 1 + } + Return (Local1) + } + + /* + * READ or WRITE from EC region + * Arg0 = EC field structure + * Arg1 = Value to write + */ + Method (ECRW, 2, Serialized) + { + If (!EREG) { + Return (Zero) + } + + Local0 = DeRefOf (Arg0[0]) /* Byte offset */ + Local1 = DeRefOf (Arg0[1]) /* Mask */ + Local2 = DeRefOf (Arg0[2]) /* Read/Write */ + + OperationRegion (ERAM, EmbeddedControl, Local0, 2) + Field (ERAM, ByteAcc, Lock, WriteAsZeros) + { + BYT1, 8, + BYT2, 8, + } + + If (Local2 == RD) { + /* Read first byte */ + Local3 = BYT1 + + /* Read second byte if needed */ + FindSetLeftBit (Local1, Local4) + If (Local4 > 8) { + Local4 = BYT2 + Local4 <<= 8 + Local3 |= Local4 + } + + Local5 = EBIT (Arg0, Local3) + Printf ("ECRD %o = %o", Local0, Local5) + Return (Local5) + } ElseIf (Local2 == WR) { + /* Write byte */ + Printf ("ECWR %o = %o", Local0, Arg1) + BYT1 = Arg1 + } + Return (Zero) + } + + /* + * Read a field from EC + * Arg0 = EC field structure + */ + Method (R, 1, Serialized) + { + Return (ECRW (Arg0, Zero)) + } + + /* + * Write value to a field from EC + * Arg0 = EC field structure + * Arg1 = Value to write + */ + Method (W, 2, Serialized) + { + Return (ECRW (Arg0, Arg1)) + } + + #include "ec_dev.asl" + #include "ec_ram.asl" + #include "lid.asl" + #include "platform.asl" +} |