| /* |
| * 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_op_int(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_op_int(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 ------------------------- */ |