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292 lines
7.4 KiB
C
292 lines
7.4 KiB
C
/******************************************************************************
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*
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* Name: sklm80.c
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* Project: GEnesis, PCI Gigabit Ethernet Adapter
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* Version: $Revision: 1.20 $
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* Date: $Date: 2002/08/13 09:16:27 $
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* Purpose: Funktions to access Voltage and Temperature Sensor (LM80)
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*
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******************************************************************************/
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/******************************************************************************
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*
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* (C)Copyright 1998-2002 SysKonnect GmbH.
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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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* The information in this file is provided "AS IS" without warranty.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* History:
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*
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* $Log: sklm80.c,v $
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* Revision 1.20 2002/08/13 09:16:27 rschmidt
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* Changed return value for SkLm80ReadSensor() back to 'int'
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* Editorial changes
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*
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* Revision 1.19 2002/08/06 09:43:31 jschmalz
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* Extensions and changes for Yukon
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*
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* Revision 1.18 2002/08/02 12:26:57 rschmidt
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* Editorial changes
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*
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* Revision 1.17 1999/11/22 13:35:51 cgoos
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* Changed license header to GPL.
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*
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* Revision 1.16 1999/05/27 14:05:47 malthoff
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* Fans: Set SenVal to 0 if the fan value is 0 or 0xff. Both values
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* are outside the limits (0: div zero error, 0xff: value not in
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* range, assume 0).
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*
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* Revision 1.15 1999/05/27 13:38:51 malthoff
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* Pervent from Division by zero errors.
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*
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* Revision 1.14 1999/05/20 09:20:01 cgoos
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* Changes for 1000Base-T (Fan sensors).
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*
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* Revision 1.13 1998/10/22 09:48:14 gklug
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* fix: SysKonnectFileId typo
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*
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* Revision 1.12 1998/10/09 06:12:06 malthoff
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* Remove ID_sccs by SysKonnectFileId.
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*
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* Revision 1.11 1998/09/04 08:33:48 malthoff
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* bug fix: SenState = SK_SEN_IDLE when
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* leaving SK_SEN_VALEXT state
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*
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* Revision 1.10 1998/08/20 12:02:10 gklug
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* fix: compiler warnings type mismatch
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*
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* Revision 1.9 1998/08/20 11:37:38 gklug
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* chg: change Ioc to IoC
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*
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* Revision 1.8 1998/08/19 12:20:58 gklug
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* fix: remove struct from C files (see CCC)
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*
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* Revision 1.7 1998/08/17 07:04:57 malthoff
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* Take SkLm80RcvReg() function from ski2c.c.
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* Add IoC parameter to BREAK_OR_WAIT() macro.
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*
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* Revision 1.6 1998/08/14 07:11:28 malthoff
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* remove pAc with pAC.
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*
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* Revision 1.5 1998/08/14 06:46:55 gklug
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* fix: temperature can get negative
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*
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* Revision 1.4 1998/08/13 08:27:04 gklug
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* add: temperature reading now o.k.
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* fix: pSen declaration, SK_ERR_LOG call, ADDR macro
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*
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* Revision 1.3 1998/08/13 07:28:21 gklug
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* fix: pSen was wrong initialized
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* add: correct conversion for voltage readings
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*
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* Revision 1.2 1998/08/11 07:52:14 gklug
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* add: Lm80 read sensor function
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*
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* Revision 1.1 1998/07/17 09:57:12 gklug
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* initial version
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*
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*
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*
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******************************************************************************/
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#include <config.h>
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#ifdef CONFIG_SK98
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/*
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LM80 functions
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*/
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static const char SysKonnectFileId[] =
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"$Id: sklm80.c,v 1.20 2002/08/13 09:16:27 rschmidt Exp $" ;
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#include "h/skdrv1st.h" /* Driver Specific Definitions */
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#include "h/lm80.h"
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#include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */
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#ifdef SK_DIAG
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#define BREAK_OR_WAIT(pAC,IoC,Event) SkI2cWait(pAC,IoC,Event)
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#else /* nSK_DIAG */
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#define BREAK_OR_WAIT(pAC,IoC,Event) break
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#endif /* nSK_DIAG */
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#ifdef SK_DIAG
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/*
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* read the register 'Reg' from the device 'Dev'
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*
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* return read error -1
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* success the read value
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*/
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int SkLm80RcvReg(
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SK_IOC IoC, /* Adapter Context */
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int Dev, /* I2C device address */
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int Reg) /* register to read */
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{
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int Val = 0;
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int TempExt;
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/* Signal device number */
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if (SkI2cSndDev(IoC, Dev, I2C_WRITE)) {
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return(-1);
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}
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if (SkI2cSndByte(IoC, Reg)) {
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return(-1);
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}
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/* repeat start */
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if (SkI2cSndDev(IoC, Dev, I2C_READ)) {
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return(-1);
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}
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switch (Reg) {
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case LM80_TEMP_IN:
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Val = (int)SkI2cRcvByte(IoC, 1);
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/* First: correct the value: it might be negative */
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if ((Val & 0x80) != 0) {
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/* Value is negative */
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Val = Val - 256;
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}
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Val = Val * SK_LM80_TEMP_LSB;
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SkI2cStop(IoC);
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TempExt = (int)SkLm80RcvReg(IoC, LM80_ADDR, LM80_TEMP_CTRL);
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if (Val > 0) {
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Val += ((TempExt >> 7) * SK_LM80_TEMPEXT_LSB);
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}
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else {
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Val -= ((TempExt >> 7) * SK_LM80_TEMPEXT_LSB);
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}
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return(Val);
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break;
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case LM80_VT0_IN:
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case LM80_VT1_IN:
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case LM80_VT2_IN:
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case LM80_VT3_IN:
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Val = (int)SkI2cRcvByte(IoC, 1) * SK_LM80_VT_LSB;
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break;
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default:
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Val = (int)SkI2cRcvByte(IoC, 1);
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break;
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}
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SkI2cStop(IoC);
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return(Val);
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}
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#endif /* SK_DIAG */
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/*
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* read a sensors value (LM80 specific)
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*
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* This function reads a sensors value from the I2C sensor chip LM80.
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* The sensor is defined by its index into the sensors database in the struct
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* pAC points to.
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*
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* Returns 1 if the read is completed
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* 0 if the read must be continued (I2C Bus still allocated)
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*/
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int SkLm80ReadSensor(
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SK_AC *pAC, /* Adapter Context */
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SK_IOC IoC, /* I/O Context needed in level 1 and 2 */
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SK_SENSOR *pSen) /* Sensor to be read */
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{
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SK_I32 Value;
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switch (pSen->SenState) {
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case SK_SEN_IDLE:
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/* Send address to ADDR register */
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SK_I2C_CTL(IoC, I2C_READ, pSen->SenDev, pSen->SenReg, 0);
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pSen->SenState = SK_SEN_VALUE ;
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BREAK_OR_WAIT(pAC, IoC, I2C_READ);
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case SK_SEN_VALUE:
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/* Read value from data register */
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SK_IN32(IoC, B2_I2C_DATA, ((SK_U32 *)&Value));
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Value &= 0xff; /* only least significant byte is valid */
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/* Do NOT check the Value against the thresholds */
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/* Checking is done in the calling instance */
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if (pSen->SenType == SK_SEN_VOLT) {
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/* Voltage sensor */
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pSen->SenValue = Value * SK_LM80_VT_LSB;
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pSen->SenState = SK_SEN_IDLE ;
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return(1);
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}
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if (pSen->SenType == SK_SEN_FAN) {
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if (Value != 0 && Value != 0xff) {
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/* Fan speed counter */
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pSen->SenValue = SK_LM80_FAN_FAKTOR/Value;
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}
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else {
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/* Indicate Fan error */
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pSen->SenValue = 0;
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}
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pSen->SenState = SK_SEN_IDLE ;
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return(1);
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}
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/* First: correct the value: it might be negative */
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if ((Value & 0x80) != 0) {
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/* Value is negative */
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Value = Value - 256;
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}
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/* We have a temperature sensor and need to get the signed extension.
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* For now we get the extension from the last reading, so in the normal
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* case we won't see flickering temperatures.
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*/
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pSen->SenValue = (Value * SK_LM80_TEMP_LSB) +
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(pSen->SenValue % SK_LM80_TEMP_LSB);
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/* Send address to ADDR register */
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SK_I2C_CTL(IoC, I2C_READ, pSen->SenDev, LM80_TEMP_CTRL, 0);
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pSen->SenState = SK_SEN_VALEXT ;
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BREAK_OR_WAIT(pAC, IoC, I2C_READ);
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case SK_SEN_VALEXT:
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/* Read value from data register */
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SK_IN32(IoC, B2_I2C_DATA, ((SK_U32 *)&Value));
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Value &= LM80_TEMP_LSB_9; /* only bit 7 is valid */
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/* cut the LSB bit */
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pSen->SenValue = ((pSen->SenValue / SK_LM80_TEMP_LSB) *
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SK_LM80_TEMP_LSB);
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if (pSen->SenValue < 0) {
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/* Value negative: The bit value must be subtracted */
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pSen->SenValue -= ((Value >> 7) * SK_LM80_TEMPEXT_LSB);
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}
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else {
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/* Value positive: The bit value must be added */
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pSen->SenValue += ((Value >> 7) * SK_LM80_TEMPEXT_LSB);
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}
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pSen->SenState = SK_SEN_IDLE ;
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return(1);
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default:
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SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_I2C_E007, SKERR_I2C_E007MSG);
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return(1);
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}
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/* Not completed */
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return(0);
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}
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#endif /* CONFIG_SK98 */
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