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100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/* NVClock 0.8 - Linux overclocker for NVIDIA cards
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*
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* site: http://nvclock.sourceforge.net
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*
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* Copyright(C) 2001-2005 Roderick Colenbrander
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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* LM99 hardware monitoring
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*/
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#include <string.h>
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#include "i2c.h"
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#include "nvclock.h"
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/* various defines for register offsets and such are needed */
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#define LM99_REG_LOCAL_TEMP 0x0
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#define LM99_REG_REMOTE_TEMP 0x1
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#define LM99_REG_MAN_ID 0xfe
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#define NATSEM_MAN_ID 0x1
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#define MAXIM_MAN_ID 0x4d
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#define LM99_REG_CHIP_ID 0xff
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/* This function should return the chip type .. */
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int lm99_detect(I2CDevPtr dev)
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{
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I2CByte man_id, chip_id;
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xf86I2CReadByte (dev, LM99_REG_MAN_ID, &man_id);
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xf86I2CReadByte (dev, LM99_REG_CHIP_ID, &chip_id);
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switch(man_id)
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{
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/* National Semiconductor LM99; needs offset? */
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case NATSEM_MAN_ID:
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dev->chip_id = LM99;
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dev->chip_name = (char*)strdup("National Semiconductor LM99");
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break;
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/* Unknown vendor; this chip was used in a FX5700Go laptop and looks similar to the MAx6659 */
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case 0x47:
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/* Maxim; likely a 655x model */
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case MAXIM_MAN_ID:
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dev->chip_id = MAX6559;
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dev->chip_name = (char*)strdup("Maxim MAX6659");
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break;
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default:
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return 0;
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}
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return 1;
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}
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int lm99_get_board_temp(I2CDevPtr dev)
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{
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I2CByte temp;
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xf86I2CReadByte(dev, LM99_REG_LOCAL_TEMP, &temp);
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return temp;
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}
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int lm99_get_gpu_temp(I2CDevPtr dev)
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{
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I2CByte temp;
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xf86I2CReadByte(dev, LM99_REG_REMOTE_TEMP, &temp);
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/* Cards with lm99 chips need an offset of 16C according to the datasheets.
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/ Further an extra offset of 10C seems to be needed on Geforce6800 cards to match nvidia-settings.
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/ Last but not least Geforce6600GT boards containing an LM99 sensor seem to need a total offset of 21C.
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*/
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if(dev->chip_id == LM99)
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{
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if(dev->arch == NV43)
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temp += 21;
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else if(dev->arch & NV4X)
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temp += 26;
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else
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temp += 16;
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}
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/* Geforce6 boards need an extra offset of +10C on both LM99 and MAX6659 chipsets.
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/ The code below is only executed for MAX6659 as we already handle the extra 10C above.
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*/
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else if(dev->arch & NV4X)
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temp += 10;
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return temp;
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}
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