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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2019 Evgeny Zinoviev <me@ch1p.io>
*
* 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.
*/
#ifndef SMC_H
#define SMC_H
#include <stdbool.h>
#include <unistd.h>
#include <stdint.h>
/* data port used by Apple SMC */
#define APPLESMC_DATA_PORT 0x300
/* command/status port used by Apple SMC */
#define APPLESMC_CMD_PORT 0x304
#define APPLESMC_MAX_DATA_LENGTH 32
/* wait up to 128 ms for a status change. */
#define APPLESMC_MIN_WAIT 0x0010
#define APPLESMC_RETRY_WAIT 0x0100
#define APPLESMC_MAX_WAIT 0x20000
#define APPLESMC_READ_CMD 0x10
#define APPLESMC_WRITE_CMD 0x11
int wait_read(void);
int send_byte(uint8_t cmd, uint16_t port);
int send_command(uint8_t cmd);
int send_argument(const char *key);
int read_smc(uint8_t cmd, const char *key, uint8_t *buffer, uint8_t len);
int write_smc(uint8_t cmd, const char *key, const uint8_t *buffer, uint8_t len);
#endif /* SMC_H */
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