diff options
Diffstat (limited to 'src/arch/x86/acpigen_dsm.c')
-rw-r--r-- | src/arch/x86/acpigen_dsm.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/arch/x86/acpigen_dsm.c b/src/arch/x86/acpigen_dsm.c new file mode 100644 index 0000000000..c6d614afd4 --- /dev/null +++ b/src/arch/x86/acpigen_dsm.c @@ -0,0 +1,65 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2016 Google Inc. + * + * 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. + */ + +#include <arch/acpigen.h> +#include <arch/acpigen_dsm.h> +#include <stdlib.h> + +/* ------------------- I2C HID DSM ---------------------------- */ + +#define ACPI_DSM_I2C_HID_UUID "3CDFF6F7-4267-4555-AD05-B30A3D8938DE" + +static void i2c_hid_func0_cb(void *arg) +{ + /* ToInteger (Arg1, Local2) */ + acpigen_write_to_integer(ARG1_OP, LOCAL2_OP); + /* If (LEqual (Local2, 0x0)) */ + acpigen_write_if_lequal(LOCAL2_OP, 0x0); + /* Return (Buffer (One) { 0x1f }) */ + acpigen_write_return_singleton_buffer(0x1f); + acpigen_pop_len(); /* Pop : If */ + /* Else */ + acpigen_write_else(); + /* If (LEqual (Local2, 0x1)) */ + acpigen_write_if_lequal(LOCAL2_OP, 0x1); + /* Return (Buffer (One) { 0x3f }) */ + acpigen_write_return_singleton_buffer(0x3f); + acpigen_pop_len(); /* Pop : If */ + /* Else */ + acpigen_write_else(); + /* Return (Buffer (One) { 0x0 }) */ + acpigen_write_return_singleton_buffer(0x0); + acpigen_pop_len(); /* Pop : Else */ + acpigen_pop_len(); /* Pop : Else */ +} + +static void i2c_hid_func1_cb(void *arg) +{ + struct dsm_i2c_hid_config *config = arg; + acpigen_write_return_byte(config->hid_desc_reg_offset); +} + +static void (*i2c_hid_callbacks[2])(void *) = { + i2c_hid_func0_cb, + i2c_hid_func1_cb, +}; + +void acpigen_write_dsm_i2c_hid(struct dsm_i2c_hid_config *config) +{ + acpigen_write_dsm(ACPI_DSM_I2C_HID_UUID, i2c_hid_callbacks, + ARRAY_SIZE(i2c_hid_callbacks), config); +} + +/* ------------------- End: I2C HID DSM ------------------------- */ |