600 lines
16 KiB
C
600 lines
16 KiB
C
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/*
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* Apple System Management Control (SMC) Tool
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* Copyright (C) 2006 devnull
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* Portions Copyright (C) 2013 Michael Wilber
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <IOKit/IOKitLib.h>
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#include "_smc.h"
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#include <libkern/OSAtomic.h>
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// Cache the keyInfo to lower the energy impact of SMCReadKey() / SMCReadKey2()
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#define KEY_INFO_CACHE_SIZE 100
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struct {
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UInt32 key;
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SMCKeyData_keyInfo_t keyInfo;
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} g_keyInfoCache[KEY_INFO_CACHE_SIZE];
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int g_keyInfoCacheCount = 0;
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OSSpinLock g_keyInfoSpinLock = 0;
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kern_return_t SMCCall2(int index, SMCKeyData_t *inputStructure, SMCKeyData_t *outputStructure, io_connect_t conn);
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UInt32 _strtoul(char *str, int size, int base)
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{
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UInt32 total = 0;
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int i;
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for (i = 0; i < size; i++)
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{
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if (base == 16)
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total += str[i] << (size - 1 - i) * 8;
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else
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total += ((unsigned char) (str[i]) << (size - 1 - i) * 8);
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}
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return total;
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}
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void _ultostr(char *str, UInt32 val)
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{
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str[0] = '\0';
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sprintf(str, "%c%c%c%c",
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(unsigned int) val >> 24,
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(unsigned int) val >> 16,
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(unsigned int) val >> 8,
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(unsigned int) val);
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}
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float _strtof(unsigned char *str, int size, int e)
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{
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float total = 0;
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int i;
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for (i = 0; i < size; i++)
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{
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if (i == (size - 1))
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total += (str[i] & 0xff) >> e;
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else
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total += str[i] << (size - 1 - i) * (8 - e);
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}
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total += (str[size-1] & 0x03) * 0.25;
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return total;
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}
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void printFP1F(SMCVal_t val)
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{
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printf("%.5f ", ntohs(*(UInt16*)val.bytes) / 32768.0);
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}
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void printFP4C(SMCVal_t val)
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{
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printf("%.5f ", ntohs(*(UInt16*)val.bytes) / 4096.0);
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}
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void printFP5B(SMCVal_t val)
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{
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printf("%.5f ", ntohs(*(UInt16*)val.bytes) / 2048.0);
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}
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void printFP6A(SMCVal_t val)
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{
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printf("%.4f ", ntohs(*(UInt16*)val.bytes) / 1024.0);
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}
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void printFP79(SMCVal_t val)
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{
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printf("%.4f ", ntohs(*(UInt16*)val.bytes) / 512.0);
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}
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void printFP88(SMCVal_t val)
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{
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printf("%.3f ", ntohs(*(UInt16*)val.bytes) / 256.0);
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}
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void printFPA6(SMCVal_t val)
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{
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printf("%.2f ", ntohs(*(UInt16*)val.bytes) / 64.0);
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}
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void printFPC4(SMCVal_t val)
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{
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printf("%.2f ", ntohs(*(UInt16*)val.bytes) / 16.0);
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}
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void printFPE2(SMCVal_t val)
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{
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printf("%.2f ", ntohs(*(UInt16*)val.bytes) / 4.0);
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}
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void printUInt(SMCVal_t val)
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{
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printf("%u ", (unsigned int) _strtoul((char *)val.bytes, val.dataSize, 10));
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}
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void printSP1E(SMCVal_t val)
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{
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printf("%.5f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 16384.0);
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}
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void printSP3C(SMCVal_t val)
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{
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printf("%.5f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 4096.0);
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}
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void printSP4B(SMCVal_t val)
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{
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printf("%.4f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 2048.0);
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}
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void printSP5A(SMCVal_t val)
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{
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printf("%.4f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 1024.0);
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}
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void printSP69(SMCVal_t val)
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{
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printf("%.3f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 512.0);
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}
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void printSP78(SMCVal_t val)
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{
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printf("%.3f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 256.0);
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}
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void printSP87(SMCVal_t val)
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{
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printf("%.3f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 128.0);
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}
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void printSP96(SMCVal_t val)
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{
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printf("%.2f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 64.0);
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}
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void printSPB4(SMCVal_t val)
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{
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printf("%.2f ", ((SInt16)ntohs(*(UInt16*)val.bytes)) / 16.0);
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}
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void printSPF0(SMCVal_t val)
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{
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printf("%.0f ", (float)ntohs(*(UInt16*)val.bytes));
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}
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void printSI8(SMCVal_t val)
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{
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printf("%d ", (signed char)*val.bytes);
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}
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void printSI16(SMCVal_t val)
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{
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printf("%d ", ntohs(*(SInt16*)val.bytes));
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}
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void printPWM(SMCVal_t val)
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{
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printf("%.1f%% ", ntohs(*(UInt16*)val.bytes) * 100 / 65536.0);
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}
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void printBytesHex(SMCVal_t val)
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{
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int i;
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printf("(bytes");
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for (i = 0; i < val.dataSize; i++)
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printf(" %02x", (unsigned char) val.bytes[i]);
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printf(")\n");
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}
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void printVal(SMCVal_t val)
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{
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printf(" %-4s [%-4s] ", val.key, val.dataType);
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if (val.dataSize > 0)
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{
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if ((strcmp(val.dataType, DATATYPE_UINT8) == 0) ||
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(strcmp(val.dataType, DATATYPE_UINT16) == 0) ||
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(strcmp(val.dataType, DATATYPE_UINT32) == 0))
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printUInt(val);
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else if (strcmp(val.dataType, DATATYPE_FP1F) == 0 && val.dataSize == 2)
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printFP1F(val);
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else if (strcmp(val.dataType, DATATYPE_FP4C) == 0 && val.dataSize == 2)
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printFP4C(val);
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else if (strcmp(val.dataType, DATATYPE_FP5B) == 0 && val.dataSize == 2)
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printFP5B(val);
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else if (strcmp(val.dataType, DATATYPE_FP6A) == 0 && val.dataSize == 2)
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printFP6A(val);
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else if (strcmp(val.dataType, DATATYPE_FP79) == 0 && val.dataSize == 2)
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printFP79(val);
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else if (strcmp(val.dataType, DATATYPE_FP88) == 0 && val.dataSize == 2)
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printFP88(val);
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else if (strcmp(val.dataType, DATATYPE_FPA6) == 0 && val.dataSize == 2)
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printFPA6(val);
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else if (strcmp(val.dataType, DATATYPE_FPC4) == 0 && val.dataSize == 2)
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printFPC4(val);
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else if (strcmp(val.dataType, DATATYPE_FPE2) == 0 && val.dataSize == 2)
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printFPE2(val);
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else if (strcmp(val.dataType, DATATYPE_SP1E) == 0 && val.dataSize == 2)
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printSP1E(val);
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else if (strcmp(val.dataType, DATATYPE_SP3C) == 0 && val.dataSize == 2)
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printSP3C(val);
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else if (strcmp(val.dataType, DATATYPE_SP4B) == 0 && val.dataSize == 2)
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printSP4B(val);
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else if (strcmp(val.dataType, DATATYPE_SP5A) == 0 && val.dataSize == 2)
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printSP5A(val);
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else if (strcmp(val.dataType, DATATYPE_SP69) == 0 && val.dataSize == 2)
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printSP69(val);
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else if (strcmp(val.dataType, DATATYPE_SP78) == 0 && val.dataSize == 2)
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printSP78(val);
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else if (strcmp(val.dataType, DATATYPE_SP87) == 0 && val.dataSize == 2)
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printSP87(val);
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else if (strcmp(val.dataType, DATATYPE_SP96) == 0 && val.dataSize == 2)
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printSP96(val);
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else if (strcmp(val.dataType, DATATYPE_SPB4) == 0 && val.dataSize == 2)
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printSPB4(val);
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else if (strcmp(val.dataType, DATATYPE_SPF0) == 0 && val.dataSize == 2)
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printSPF0(val);
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else if (strcmp(val.dataType, DATATYPE_SI8) == 0 && val.dataSize == 1)
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printSI8(val);
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else if (strcmp(val.dataType, DATATYPE_SI16) == 0 && val.dataSize == 2)
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printSI16(val);
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else if (strcmp(val.dataType, DATATYPE_PWM) == 0 && val.dataSize == 2)
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printPWM(val);
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printBytesHex(val);
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}
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else
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{
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printf("no data\n");
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}
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}
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kern_return_t SMCOpen(io_connect_t *conn)
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{
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kern_return_t result;
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mach_port_t masterPort;
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io_iterator_t iterator;
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io_object_t device;
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IOMasterPort(MACH_PORT_NULL, &masterPort);
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CFMutableDictionaryRef matchingDictionary = IOServiceMatching("AppleSMC");
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result = IOServiceGetMatchingServices(masterPort, matchingDictionary, &iterator);
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if (result != kIOReturnSuccess)
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{
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printf("Error: IOServiceGetMatchingServices() = %08x\n", result);
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return 1;
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}
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device = IOIteratorNext(iterator);
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IOObjectRelease(iterator);
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if (device == 0)
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{
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printf("Error: no SMC found\n");
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return 1;
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}
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result = IOServiceOpen(device, mach_task_self(), 0, conn);
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IOObjectRelease(device);
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if (result != kIOReturnSuccess)
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{
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printf("Error: IOServiceOpen() = %08x\n", result);
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return 1;
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}
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return kIOReturnSuccess;
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}
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kern_return_t SMCClose(io_connect_t conn)
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{
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return IOServiceClose(conn);
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}
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kern_return_t SMCCall2(int index, SMCKeyData_t *inputStructure, SMCKeyData_t *outputStructure,io_connect_t conn)
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{
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size_t structureInputSize;
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size_t structureOutputSize;
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structureInputSize = sizeof(SMCKeyData_t);
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structureOutputSize = sizeof(SMCKeyData_t);
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return IOConnectCallStructMethod(conn, index, inputStructure, structureInputSize, outputStructure, &structureOutputSize);
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}
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// Provides key info, using a cache to dramatically improve the energy impact of smcFanControl
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kern_return_t SMCGetKeyInfo(UInt32 key, SMCKeyData_keyInfo_t* keyInfo, io_connect_t conn)
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{
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SMCKeyData_t inputStructure;
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SMCKeyData_t outputStructure;
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kern_return_t result = kIOReturnSuccess;
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int i = 0;
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OSSpinLockLock(&g_keyInfoSpinLock);
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for (; i < g_keyInfoCacheCount; ++i)
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{
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if (key == g_keyInfoCache[i].key)
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{
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*keyInfo = g_keyInfoCache[i].keyInfo;
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break;
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}
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}
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if (i == g_keyInfoCacheCount)
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{
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// Not in cache, must look it up.
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memset(&inputStructure, 0, sizeof(inputStructure));
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memset(&outputStructure, 0, sizeof(outputStructure));
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inputStructure.key = key;
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inputStructure.data8 = SMC_CMD_READ_KEYINFO;
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result = SMCCall2(KERNEL_INDEX_SMC, &inputStructure, &outputStructure, conn);
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if (result == kIOReturnSuccess)
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{
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*keyInfo = outputStructure.keyInfo;
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if (g_keyInfoCacheCount < KEY_INFO_CACHE_SIZE)
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{
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g_keyInfoCache[g_keyInfoCacheCount].key = key;
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g_keyInfoCache[g_keyInfoCacheCount].keyInfo = outputStructure.keyInfo;
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++g_keyInfoCacheCount;
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}
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}
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}
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|
|
||
|
|
OSSpinLockUnlock(&g_keyInfoSpinLock);
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_return_t SMCReadKey2(UInt32Char_t key, SMCVal_t *val,io_connect_t conn)
|
||
|
|
{
|
||
|
|
kern_return_t result;
|
||
|
|
SMCKeyData_t inputStructure;
|
||
|
|
SMCKeyData_t outputStructure;
|
||
|
|
|
||
|
|
memset(&inputStructure, 0, sizeof(SMCKeyData_t));
|
||
|
|
memset(&outputStructure, 0, sizeof(SMCKeyData_t));
|
||
|
|
memset(val, 0, sizeof(SMCVal_t));
|
||
|
|
|
||
|
|
inputStructure.key = _strtoul(key, 4, 16);
|
||
|
|
sprintf(val->key, key);
|
||
|
|
|
||
|
|
result = SMCGetKeyInfo(inputStructure.key, &outputStructure.keyInfo, conn);
|
||
|
|
if (result != kIOReturnSuccess)
|
||
|
|
{
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
val->dataSize = outputStructure.keyInfo.dataSize;
|
||
|
|
_ultostr(val->dataType, outputStructure.keyInfo.dataType);
|
||
|
|
inputStructure.keyInfo.dataSize = val->dataSize;
|
||
|
|
inputStructure.data8 = SMC_CMD_READ_BYTES;
|
||
|
|
|
||
|
|
result = SMCCall2(KERNEL_INDEX_SMC, &inputStructure, &outputStructure,conn);
|
||
|
|
if (result != kIOReturnSuccess)
|
||
|
|
{
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(val->bytes, outputStructure.bytes, sizeof(outputStructure.bytes));
|
||
|
|
|
||
|
|
return kIOReturnSuccess;
|
||
|
|
}
|
||
|
|
|
||
|
|
io_connect_t g_conn = 0;
|
||
|
|
|
||
|
|
void smc_init(){
|
||
|
|
SMCOpen(&g_conn);
|
||
|
|
}
|
||
|
|
|
||
|
|
void smc_close(){
|
||
|
|
SMCClose(g_conn);
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_return_t SMCCall(int index, SMCKeyData_t *inputStructure, SMCKeyData_t *outputStructure)
|
||
|
|
{
|
||
|
|
return SMCCall2(index, inputStructure, outputStructure, g_conn);
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_return_t SMCReadKey(UInt32Char_t key, SMCVal_t *val)
|
||
|
|
{
|
||
|
|
return SMCReadKey2(key, val, g_conn);
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_return_t SMCWriteKey2(SMCVal_t writeVal, io_connect_t conn)
|
||
|
|
{
|
||
|
|
kern_return_t result;
|
||
|
|
SMCKeyData_t inputStructure;
|
||
|
|
SMCKeyData_t outputStructure;
|
||
|
|
|
||
|
|
SMCVal_t readVal;
|
||
|
|
|
||
|
|
result = SMCReadKey2(writeVal.key, &readVal,conn);
|
||
|
|
if (result != kIOReturnSuccess)
|
||
|
|
return result;
|
||
|
|
|
||
|
|
if (readVal.dataSize != writeVal.dataSize)
|
||
|
|
return kIOReturnError;
|
||
|
|
|
||
|
|
memset(&inputStructure, 0, sizeof(SMCKeyData_t));
|
||
|
|
memset(&outputStructure, 0, sizeof(SMCKeyData_t));
|
||
|
|
|
||
|
|
inputStructure.key = _strtoul(writeVal.key, 4, 16);
|
||
|
|
inputStructure.data8 = SMC_CMD_WRITE_BYTES;
|
||
|
|
inputStructure.keyInfo.dataSize = writeVal.dataSize;
|
||
|
|
memcpy(inputStructure.bytes, writeVal.bytes, sizeof(writeVal.bytes));
|
||
|
|
result = SMCCall2(KERNEL_INDEX_SMC, &inputStructure, &outputStructure,conn);
|
||
|
|
|
||
|
|
if (result != kIOReturnSuccess)
|
||
|
|
return result;
|
||
|
|
return kIOReturnSuccess;
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_return_t SMCWriteKey(SMCVal_t writeVal)
|
||
|
|
{
|
||
|
|
return SMCWriteKey2(writeVal, g_conn);
|
||
|
|
}
|
||
|
|
|
||
|
|
UInt32 SMCReadIndexCount(void)
|
||
|
|
{
|
||
|
|
SMCVal_t val;
|
||
|
|
|
||
|
|
SMCReadKey("#KEY", &val);
|
||
|
|
return _strtoul((char *)val.bytes, val.dataSize, 10);
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_return_t SMCPrintAll(void)
|
||
|
|
{
|
||
|
|
kern_return_t result;
|
||
|
|
SMCKeyData_t inputStructure;
|
||
|
|
SMCKeyData_t outputStructure;
|
||
|
|
|
||
|
|
int totalKeys, i;
|
||
|
|
UInt32Char_t key;
|
||
|
|
SMCVal_t val;
|
||
|
|
|
||
|
|
totalKeys = SMCReadIndexCount();
|
||
|
|
for (i = 0; i < totalKeys; i++)
|
||
|
|
{
|
||
|
|
memset(&inputStructure, 0, sizeof(SMCKeyData_t));
|
||
|
|
memset(&outputStructure, 0, sizeof(SMCKeyData_t));
|
||
|
|
memset(&val, 0, sizeof(SMCVal_t));
|
||
|
|
|
||
|
|
inputStructure.data8 = SMC_CMD_READ_INDEX;
|
||
|
|
inputStructure.data32 = i;
|
||
|
|
|
||
|
|
result = SMCCall(KERNEL_INDEX_SMC, &inputStructure, &outputStructure);
|
||
|
|
if (result != kIOReturnSuccess)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
_ultostr(key, outputStructure.key);
|
||
|
|
|
||
|
|
SMCReadKey(key, &val);
|
||
|
|
printVal(val);
|
||
|
|
}
|
||
|
|
|
||
|
|
return kIOReturnSuccess;
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_return_t SMCPrintFans(void)
|
||
|
|
{
|
||
|
|
kern_return_t result;
|
||
|
|
SMCVal_t val;
|
||
|
|
UInt32Char_t key;
|
||
|
|
int totalFans, i;
|
||
|
|
|
||
|
|
result = SMCReadKey("FNum", &val);
|
||
|
|
if (result != kIOReturnSuccess)
|
||
|
|
return kIOReturnError;
|
||
|
|
|
||
|
|
totalFans = _strtoul((char *)val.bytes, val.dataSize, 10);
|
||
|
|
printf("Total fans in system: %d\n", totalFans);
|
||
|
|
|
||
|
|
for (i = 0; i < totalFans; i++)
|
||
|
|
{
|
||
|
|
printf("\nFan #%d:\n", i);
|
||
|
|
sprintf(key, "F%dID", i);
|
||
|
|
SMCReadKey(key, &val);
|
||
|
|
printf(" Fan ID : %s\n", val.bytes+4);
|
||
|
|
sprintf(key, "F%dAc", i);
|
||
|
|
SMCReadKey(key, &val);
|
||
|
|
printf(" Actual speed : %.0f\n", _strtof(val.bytes, val.dataSize, 2));
|
||
|
|
sprintf(key, "F%dMn", i);
|
||
|
|
SMCReadKey(key, &val);
|
||
|
|
printf(" Minimum speed: %.0f\n", _strtof(val.bytes, val.dataSize, 2));
|
||
|
|
sprintf(key, "F%dMx", i);
|
||
|
|
SMCReadKey(key, &val);
|
||
|
|
printf(" Maximum speed: %.0f\n", _strtof(val.bytes, val.dataSize, 2));
|
||
|
|
sprintf(key, "F%dSf", i);
|
||
|
|
SMCReadKey(key, &val);
|
||
|
|
printf(" Safe speed : %.0f\n", _strtof(val.bytes, val.dataSize, 2));
|
||
|
|
sprintf(key, "F%dTg", i);
|
||
|
|
SMCReadKey(key, &val);
|
||
|
|
printf(" Target speed : %.0f\n", _strtof(val.bytes, val.dataSize, 2));
|
||
|
|
SMCReadKey("FS! ", &val);
|
||
|
|
if ((_strtoul((char *)val.bytes, 2, 16) & (1 << i)) == 0)
|
||
|
|
printf(" Mode : auto\n");
|
||
|
|
else
|
||
|
|
printf(" Mode : forced\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
return kIOReturnSuccess;
|
||
|
|
}
|
||
|
|
|
||
|
|
void usage(char* prog)
|
||
|
|
{
|
||
|
|
printf("Apple System Management Control (SMC) tool %s\n", VERSION);
|
||
|
|
printf("Usage:\n");
|
||
|
|
printf("%s [options]\n", prog);
|
||
|
|
printf(" -f : fan info decoded\n");
|
||
|
|
printf(" -h : help\n");
|
||
|
|
printf(" -k <key> : key to manipulate\n");
|
||
|
|
printf(" -l : list all keys and values\n");
|
||
|
|
printf(" -r : read the value of a key\n");
|
||
|
|
printf(" -w <value> : write the specified value to a key\n");
|
||
|
|
printf(" -v : version\n");
|
||
|
|
printf("\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
kern_return_t SMCWriteSimple(UInt32Char_t key, char *wvalue, io_connect_t conn)
|
||
|
|
{
|
||
|
|
kern_return_t result;
|
||
|
|
SMCVal_t val;
|
||
|
|
int i;
|
||
|
|
char c[3];
|
||
|
|
for (i = 0; i < strlen(wvalue); i++)
|
||
|
|
{
|
||
|
|
sprintf(c, "%c%c", wvalue[i * 2], wvalue[(i * 2) + 1]);
|
||
|
|
val.bytes[i] = (int) strtol(c, NULL, 16);
|
||
|
|
}
|
||
|
|
val.dataSize = i / 2;
|
||
|
|
sprintf(val.key, key);
|
||
|
|
result = SMCWriteKey2(val, conn);
|
||
|
|
if (result != kIOReturnSuccess)
|
||
|
|
printf("Error: SMCWriteKey() = %08x\n", result);
|
||
|
|
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
double SMCGetTemperature(char *key)
|
||
|
|
{
|
||
|
|
SMCVal_t val;
|
||
|
|
kern_return_t result;
|
||
|
|
|
||
|
|
result = SMCReadKey(key, &val);
|
||
|
|
if (result == kIOReturnSuccess) {
|
||
|
|
// read succeeded - check returned value
|
||
|
|
if (val.dataSize > 0) {
|
||
|
|
if (strcmp(val.dataType, DATATYPE_SP78) == 0) {
|
||
|
|
// convert sp78 value to temperature
|
||
|
|
int intValue = val.bytes[0] * 256 + (unsigned char)val.bytes[1];
|
||
|
|
return intValue / 256.0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// read failed
|
||
|
|
return 0.0;
|
||
|
|
}
|