smc.h

/*
 * Apple System Management Control (SMC) Tool
 * Copyright (C) 2006 devnull 
 *
 * 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; either version 2
 * of the License, or (at your option) any later version.

 * 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.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef __SMC_H__
#define __SMC_H__
#endif

#define VERSION "0.01"

#define KERNEL_INDEX_SMC 2

#define SMC_CMD_READ_BYTES 5
#define SMC_CMD_WRITE_BYTES 6
#define SMC_CMD_READ_INDEX 8
#define SMC_CMD_READ_KEYINFO 9
#define SMC_CMD_READ_PLIMIT 11
#define SMC_CMD_READ_VERS 12

#define DATATYPE_FPE2 "fpe2"
#define DATATYPE_UINT8 "ui8 "
#define DATATYPE_UINT16 "ui16"
#define DATATYPE_UINT32 "ui32"
#define DATATYPE_SP78 "sp78"

// key values
#define SMC_KEY_CPU_TEMP "TCXC"
#define SMC_KEY_GPU_TEMP "TCGC"
#define SMC_KEY_FAN0_RPM_CUR "F0Ac"

typedef struct {
    char major;
    char minor;
    char build;
    char reserved[1];
    UInt16 release;
} SMCKeyData_vers_t;

typedef struct {
    UInt16 version;
    UInt16 length;
    UInt32 cpuPLimit;
    UInt32 gpuPLimit;
    UInt32 memPLimit;
} SMCKeyData_pLimitData_t;

typedef struct {
    UInt32 dataSize;
    UInt32 dataType;
    char dataAttributes;
} SMCKeyData_keyInfo_t;

typedef char SMCBytes_t[32];

typedef struct {
    UInt32 key;
    SMCKeyData_vers_t vers;
    SMCKeyData_pLimitData_t pLimitData;
    SMCKeyData_keyInfo_t keyInfo;
    char result;
    char status;
    char data8;
    UInt32 data32;
    SMCBytes_t bytes;
} SMCKeyData_t;

typedef char UInt32Char_t[5];

typedef struct {
    UInt32Char_t key;
    UInt32 dataSize;
    UInt32Char_t dataType;
    SMCBytes_t bytes;
} SMCVal_t;

// prototypes
double SMCGetTemperature(char* key);
kern_return_t SMCSetFanRpm(char* key, int rpm);
int SMCGetFanRpm(char* key);