diff options
Diffstat (limited to 'drivers/sk98lin/sklm80.c')
| -rw-r--r-- | drivers/sk98lin/sklm80.c | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/drivers/sk98lin/sklm80.c b/drivers/sk98lin/sklm80.c new file mode 100644 index 0000000..51c7cc4 --- /dev/null +++ b/drivers/sk98lin/sklm80.c @@ -0,0 +1,286 @@ +/****************************************************************************** + * + * Name: sklm80.c + * Project: GEnesis, PCI Gigabit Ethernet Adapter + * Version: $Revision: 1.20 $ + * Date: $Date: 2002/08/13 09:16:27 $ + * Purpose: Funktions to access Voltage and Temperature Sensor (LM80) + * + ******************************************************************************/ + +/****************************************************************************** + * + * (C)Copyright 1998-2002 SysKonnect GmbH. + * + * 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. + * + * The information in this file is provided "AS IS" without warranty. + * + ******************************************************************************/ + +/****************************************************************************** + * + * History: + * + * $Log: sklm80.c,v $ + * Revision 1.20 2002/08/13 09:16:27 rschmidt + * Changed return value for SkLm80ReadSensor() back to 'int' + * Editorial changes + * + * Revision 1.19 2002/08/06 09:43:31 jschmalz + * Extensions and changes for Yukon + * + * Revision 1.18 2002/08/02 12:26:57 rschmidt + * Editorial changes + * + * Revision 1.17 1999/11/22 13:35:51 cgoos + * Changed license header to GPL. + * + * Revision 1.16 1999/05/27 14:05:47 malthoff + * Fans: Set SenVal to 0 if the fan value is 0 or 0xff. Both values + * are outside the limits (0: div zero error, 0xff: value not in + * range, assume 0). + * + * Revision 1.15 1999/05/27 13:38:51 malthoff + * Pervent from Division by zero errors. + * + * Revision 1.14 1999/05/20 09:20:01 cgoos + * Changes for 1000Base-T (Fan sensors). + * + * Revision 1.13 1998/10/22 09:48:14 gklug + * fix: SysKonnectFileId typo + * + * Revision 1.12 1998/10/09 06:12:06 malthoff + * Remove ID_sccs by SysKonnectFileId. + * + * Revision 1.11 1998/09/04 08:33:48 malthoff + * bug fix: SenState = SK_SEN_IDLE when + * leaving SK_SEN_VALEXT state + * + * Revision 1.10 1998/08/20 12:02:10 gklug + * fix: compiler warnings type mismatch + * + * Revision 1.9 1998/08/20 11:37:38 gklug + * chg: change Ioc to IoC + * + * Revision 1.8 1998/08/19 12:20:58 gklug + * fix: remove struct from C files (see CCC) + * + * Revision 1.7 1998/08/17 07:04:57 malthoff + * Take SkLm80RcvReg() function from ski2c.c. + * Add IoC parameter to BREAK_OR_WAIT() macro. + * + * Revision 1.6 1998/08/14 07:11:28 malthoff + * remove pAc with pAC. + * + * Revision 1.5 1998/08/14 06:46:55 gklug + * fix: temperature can get negative + * + * Revision 1.4 1998/08/13 08:27:04 gklug + * add: temperature reading now o.k. + * fix: pSen declaration, SK_ERR_LOG call, ADDR macro + * + * Revision 1.3 1998/08/13 07:28:21 gklug + * fix: pSen was wrong initialized + * add: correct conversion for voltage readings + * + * Revision 1.2 1998/08/11 07:52:14 gklug + * add: Lm80 read sensor function + * + * Revision 1.1 1998/07/17 09:57:12 gklug + * initial version + * + * + * + ******************************************************************************/ + + +/* + LM80 functions +*/ +static const char SysKonnectFileId[] = + "$Id: sklm80.c,v 1.20 2002/08/13 09:16:27 rschmidt Exp $" ; + +#include "h/skdrv1st.h" /* Driver Specific Definitions */ +#include "h/lm80.h" +#include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */ + +#ifdef SK_DIAG +#define BREAK_OR_WAIT(pAC,IoC,Event) SkI2cWait(pAC,IoC,Event) +#else /* nSK_DIAG */ +#define BREAK_OR_WAIT(pAC,IoC,Event) break +#endif /* nSK_DIAG */ + +#ifdef SK_DIAG +/* + * read the register 'Reg' from the device 'Dev' + * + * return read error -1 + * success the read value + */ +int SkLm80RcvReg( +SK_IOC IoC, /* Adapter Context */ +int Dev, /* I2C device address */ +int Reg) /* register to read */ +{ + int Val = 0; + int TempExt; + + /* Signal device number */ + if (SkI2cSndDev(IoC, Dev, I2C_WRITE)) { + return(-1); + } + + if (SkI2cSndByte(IoC, Reg)) { + return(-1); + } + + /* repeat start */ + if (SkI2cSndDev(IoC, Dev, I2C_READ)) { + return(-1); + } + + switch (Reg) { + case LM80_TEMP_IN: + Val = (int)SkI2cRcvByte(IoC, 1); + + /* First: correct the value: it might be negative */ + if ((Val & 0x80) != 0) { + /* Value is negative */ + Val = Val - 256; + } + Val = Val * SK_LM80_TEMP_LSB; + SkI2cStop(IoC); + + TempExt = (int)SkLm80RcvReg(IoC, LM80_ADDR, LM80_TEMP_CTRL); + + if (Val > 0) { + Val += ((TempExt >> 7) * SK_LM80_TEMPEXT_LSB); + } + else { + Val -= ((TempExt >> 7) * SK_LM80_TEMPEXT_LSB); + } + return(Val); + break; + case LM80_VT0_IN: + case LM80_VT1_IN: + case LM80_VT2_IN: + case LM80_VT3_IN: + Val = (int)SkI2cRcvByte(IoC, 1) * SK_LM80_VT_LSB; + break; + + default: + Val = (int)SkI2cRcvByte(IoC, 1); + break; + } + + SkI2cStop(IoC); + return(Val); +} +#endif /* SK_DIAG */ + +/* + * read a sensors value (LM80 specific) + * + * This function reads a sensors value from the I2C sensor chip LM80. + * The sensor is defined by its index into the sensors database in the struct + * pAC points to. + * + * Returns 1 if the read is completed + * 0 if the read must be continued (I2C Bus still allocated) + */ +int SkLm80ReadSensor( +SK_AC *pAC, /* Adapter Context */ +SK_IOC IoC, /* I/O Context needed in level 1 and 2 */ +SK_SENSOR *pSen) /* Sensor to be read */ +{ + SK_I32 Value; + + switch (pSen->SenState) { + case SK_SEN_IDLE: + /* Send address to ADDR register */ + SK_I2C_CTL(IoC, I2C_READ, pSen->SenDev, pSen->SenReg, 0); + + pSen->SenState = SK_SEN_VALUE ; + BREAK_OR_WAIT(pAC, IoC, I2C_READ); + + case SK_SEN_VALUE: + /* Read value from data register */ + SK_IN32(IoC, B2_I2C_DATA, ((SK_U32 *)&Value)); + + Value &= 0xff; /* only least significant byte is valid */ + + /* Do NOT check the Value against the thresholds */ + /* Checking is done in the calling instance */ + + if (pSen->SenType == SK_SEN_VOLT) { + /* Voltage sensor */ + pSen->SenValue = Value * SK_LM80_VT_LSB; + pSen->SenState = SK_SEN_IDLE ; + return(1); + } + + if (pSen->SenType == SK_SEN_FAN) { + if (Value != 0 && Value != 0xff) { + /* Fan speed counter */ + pSen->SenValue = SK_LM80_FAN_FAKTOR/Value; + } + else { + /* Indicate Fan error */ + pSen->SenValue = 0; + } + pSen->SenState = SK_SEN_IDLE ; + return(1); + } + + /* First: correct the value: it might be negative */ + if ((Value & 0x80) != 0) { + /* Value is negative */ + Value = Value - 256; + } + + /* We have a temperature sensor and need to get the signed extension. + * For now we get the extension from the last reading, so in the normal + * case we won't see flickering temperatures. + */ + pSen->SenValue = (Value * SK_LM80_TEMP_LSB) + + (pSen->SenValue % SK_LM80_TEMP_LSB); + + /* Send address to ADDR register */ + SK_I2C_CTL(IoC, I2C_READ, pSen->SenDev, LM80_TEMP_CTRL, 0); + + pSen->SenState = SK_SEN_VALEXT ; + BREAK_OR_WAIT(pAC, IoC, I2C_READ); + + case SK_SEN_VALEXT: + /* Read value from data register */ + SK_IN32(IoC, B2_I2C_DATA, ((SK_U32 *)&Value)); + Value &= LM80_TEMP_LSB_9; /* only bit 7 is valid */ + + /* cut the LSB bit */ + pSen->SenValue = ((pSen->SenValue / SK_LM80_TEMP_LSB) * + SK_LM80_TEMP_LSB); + + if (pSen->SenValue < 0) { + /* Value negative: The bit value must be subtracted */ + pSen->SenValue -= ((Value >> 7) * SK_LM80_TEMPEXT_LSB); + } + else { + /* Value positive: The bit value must be added */ + pSen->SenValue += ((Value >> 7) * SK_LM80_TEMPEXT_LSB); + } + + pSen->SenState = SK_SEN_IDLE ; + return(1); + + default: + SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_I2C_E007, SKERR_I2C_E007MSG); + return(1); + } + + /* Not completed */ + return(0); +} |