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path: root/drivers/net/sk98lin/sklm80.c
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-rw-r--r--drivers/net/sk98lin/sklm80.c292
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diff --git a/drivers/net/sk98lin/sklm80.c b/drivers/net/sk98lin/sklm80.c
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+/******************************************************************************
+ *
+ * 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
+ *
+ *
+ *
+ ******************************************************************************/
+
+
+#include <config.h>
+
+#ifdef CONFIG_SK98
+
+/*
+ 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);
+}
+
+#endif /* CONFIG_SK98 */