patch-2.2.14 linux/drivers/net/sk98lin/sklm80.c

• Lines: 271
• Date: Tue Jan 4 10:12:18 2000
• Orig file: v2.2.13/linux/drivers/net/sk98lin/sklm80.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.13/linux/drivers/net/sk98lin/sklm80.c linux/drivers/net/sk98lin/sklm80.c
@@ -0,0 +1,270 @@
+/******************************************************************************
+ *
+ * Name:	sklm80.c
+ * Project:	GEnesis, PCI Gigabit Ethernet Adapter
+ * Version:	$Revision: 1.16 $
+ * Date:	$Date: 1999/05/27 14:05:47 $
+ * Purpose:	Funktions to access Voltage and Temperature Sensor (LM80)
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ *	(C)Copyright 1998,1999 SysKonnect,
+ *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
+ *
+ *	See the file "skge.c" for further information.
+ *
+ *	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 1.16  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 1.16 1999/05/27 14:05:47 malthoff 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 regeister 'reg' from the device 'device'
+ *
+ * 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,	/* IoContext 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) ;
+}