142 lines
4 KiB
C
142 lines
4 KiB
C
|
/******************************************************************************
|
||
|
|
*
|
||
|
|
* Name: sklm80.c
|
||
|
|
* Project: Gigabit Ethernet Adapters, TWSI-Module
|
||
|
|
* Version: $Revision: 1.22 $
|
||
|
|
* Date: $Date: 2003/10/20 09:08:21 $
|
||
|
|
* Purpose: Functions to access Voltage and Temperature Sensor (LM80)
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/******************************************************************************
|
||
|
|
*
|
||
|
|
* (C)Copyright 1998-2002 SysKonnect.
|
||
|
|
* (C)Copyright 2002-2003 Marvell.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/*
|
||
|
|
LM80 functions
|
||
|
|
*/
|
||
|
|
#if (defined(DEBUG) || ((!defined(LINT)) && (!defined(SK_SLIM))))
|
||
|
|
static const char SysKonnectFileId[] =
|
||
|
|
"@(#) $Id: sklm80.c,v 1.22 2003/10/20 09:08:21 rschmidt Exp $ (C) Marvell. ";
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "h/skdrv1st.h" /* Driver Specific Definitions */
|
||
|
|
#include "h/lm80.h"
|
||
|
|
#include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */
|
||
|
|
|
||
|
|
#define BREAK_OR_WAIT(pAC,IoC,Event) break
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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, I2C_025K_DEV, 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, I2C_025K_DEV, 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);
|
||
|
|
}
|
||
|
|
|