1 /******************************************************************************
4 * Project: GEnesis, PCI Gigabit Ethernet Adapter
5 * Version: $Revision: 1.20 $
6 * Date: $Date: 2002/08/13 09:16:27 $
7 * Purpose: Funktions to access Voltage and Temperature Sensor (LM80)
9 ******************************************************************************/
11 /******************************************************************************
13 * (C)Copyright 1998-2002 SysKonnect GmbH.
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * The information in this file is provided "AS IS" without warranty.
22 ******************************************************************************/
24 /******************************************************************************
29 * Revision 1.20 2002/08/13 09:16:27 rschmidt
30 * Changed return value for SkLm80ReadSensor() back to 'int'
33 * Revision 1.19 2002/08/06 09:43:31 jschmalz
34 * Extensions and changes for Yukon
36 * Revision 1.18 2002/08/02 12:26:57 rschmidt
39 * Revision 1.17 1999/11/22 13:35:51 cgoos
40 * Changed license header to GPL.
42 * Revision 1.16 1999/05/27 14:05:47 malthoff
43 * Fans: Set SenVal to 0 if the fan value is 0 or 0xff. Both values
44 * are outside the limits (0: div zero error, 0xff: value not in
47 * Revision 1.15 1999/05/27 13:38:51 malthoff
48 * Pervent from Division by zero errors.
50 * Revision 1.14 1999/05/20 09:20:01 cgoos
51 * Changes for 1000Base-T (Fan sensors).
53 * Revision 1.13 1998/10/22 09:48:14 gklug
54 * fix: SysKonnectFileId typo
56 * Revision 1.12 1998/10/09 06:12:06 malthoff
57 * Remove ID_sccs by SysKonnectFileId.
59 * Revision 1.11 1998/09/04 08:33:48 malthoff
60 * bug fix: SenState = SK_SEN_IDLE when
61 * leaving SK_SEN_VALEXT state
63 * Revision 1.10 1998/08/20 12:02:10 gklug
64 * fix: compiler warnings type mismatch
66 * Revision 1.9 1998/08/20 11:37:38 gklug
67 * chg: change Ioc to IoC
69 * Revision 1.8 1998/08/19 12:20:58 gklug
70 * fix: remove struct from C files (see CCC)
72 * Revision 1.7 1998/08/17 07:04:57 malthoff
73 * Take SkLm80RcvReg() function from ski2c.c.
74 * Add IoC parameter to BREAK_OR_WAIT() macro.
76 * Revision 1.6 1998/08/14 07:11:28 malthoff
77 * remove pAc with pAC.
79 * Revision 1.5 1998/08/14 06:46:55 gklug
80 * fix: temperature can get negative
82 * Revision 1.4 1998/08/13 08:27:04 gklug
83 * add: temperature reading now o.k.
84 * fix: pSen declaration, SK_ERR_LOG call, ADDR macro
86 * Revision 1.3 1998/08/13 07:28:21 gklug
87 * fix: pSen was wrong initialized
88 * add: correct conversion for voltage readings
90 * Revision 1.2 1998/08/11 07:52:14 gklug
91 * add: Lm80 read sensor function
93 * Revision 1.1 1998/07/17 09:57:12 gklug
98 ******************************************************************************/
106 static const char SysKonnectFileId[] =
107 "$Id: sklm80.c,v 1.20 2002/08/13 09:16:27 rschmidt Exp $" ;
109 #include "h/skdrv1st.h" /* Driver Specific Definitions */
111 #include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */
114 #define BREAK_OR_WAIT(pAC,IoC,Event) SkI2cWait(pAC,IoC,Event)
116 #define BREAK_OR_WAIT(pAC,IoC,Event) break
117 #endif /* nSK_DIAG */
121 * read the register 'Reg' from the device 'Dev'
123 * return read error -1
124 * success the read value
127 SK_IOC IoC, /* Adapter Context */
128 int Dev, /* I2C device address */
129 int Reg) /* register to read */
134 /* Signal device number */
135 if (SkI2cSndDev(IoC, Dev, I2C_WRITE)) {
139 if (SkI2cSndByte(IoC, Reg)) {
144 if (SkI2cSndDev(IoC, Dev, I2C_READ)) {
150 Val = (int)SkI2cRcvByte(IoC, 1);
152 /* First: correct the value: it might be negative */
153 if ((Val & 0x80) != 0) {
154 /* Value is negative */
157 Val = Val * SK_LM80_TEMP_LSB;
160 TempExt = (int)SkLm80RcvReg(IoC, LM80_ADDR, LM80_TEMP_CTRL);
163 Val += ((TempExt >> 7) * SK_LM80_TEMPEXT_LSB);
166 Val -= ((TempExt >> 7) * SK_LM80_TEMPEXT_LSB);
174 Val = (int)SkI2cRcvByte(IoC, 1) * SK_LM80_VT_LSB;
178 Val = (int)SkI2cRcvByte(IoC, 1);
188 * read a sensors value (LM80 specific)
190 * This function reads a sensors value from the I2C sensor chip LM80.
191 * The sensor is defined by its index into the sensors database in the struct
194 * Returns 1 if the read is completed
195 * 0 if the read must be continued (I2C Bus still allocated)
197 int SkLm80ReadSensor(
198 SK_AC *pAC, /* Adapter Context */
199 SK_IOC IoC, /* I/O Context needed in level 1 and 2 */
200 SK_SENSOR *pSen) /* Sensor to be read */
204 switch (pSen->SenState) {
206 /* Send address to ADDR register */
207 SK_I2C_CTL(IoC, I2C_READ, pSen->SenDev, pSen->SenReg, 0);
209 pSen->SenState = SK_SEN_VALUE ;
210 BREAK_OR_WAIT(pAC, IoC, I2C_READ);
213 /* Read value from data register */
214 SK_IN32(IoC, B2_I2C_DATA, ((SK_U32 *)&Value));
216 Value &= 0xff; /* only least significant byte is valid */
218 /* Do NOT check the Value against the thresholds */
219 /* Checking is done in the calling instance */
221 if (pSen->SenType == SK_SEN_VOLT) {
223 pSen->SenValue = Value * SK_LM80_VT_LSB;
224 pSen->SenState = SK_SEN_IDLE ;
228 if (pSen->SenType == SK_SEN_FAN) {
229 if (Value != 0 && Value != 0xff) {
230 /* Fan speed counter */
231 pSen->SenValue = SK_LM80_FAN_FAKTOR/Value;
234 /* Indicate Fan error */
237 pSen->SenState = SK_SEN_IDLE ;
241 /* First: correct the value: it might be negative */
242 if ((Value & 0x80) != 0) {
243 /* Value is negative */
247 /* We have a temperature sensor and need to get the signed extension.
248 * For now we get the extension from the last reading, so in the normal
249 * case we won't see flickering temperatures.
251 pSen->SenValue = (Value * SK_LM80_TEMP_LSB) +
252 (pSen->SenValue % SK_LM80_TEMP_LSB);
254 /* Send address to ADDR register */
255 SK_I2C_CTL(IoC, I2C_READ, pSen->SenDev, LM80_TEMP_CTRL, 0);
257 pSen->SenState = SK_SEN_VALEXT ;
258 BREAK_OR_WAIT(pAC, IoC, I2C_READ);
261 /* Read value from data register */
262 SK_IN32(IoC, B2_I2C_DATA, ((SK_U32 *)&Value));
263 Value &= LM80_TEMP_LSB_9; /* only bit 7 is valid */
265 /* cut the LSB bit */
266 pSen->SenValue = ((pSen->SenValue / SK_LM80_TEMP_LSB) *
269 if (pSen->SenValue < 0) {
270 /* Value negative: The bit value must be subtracted */
271 pSen->SenValue -= ((Value >> 7) * SK_LM80_TEMPEXT_LSB);
274 /* Value positive: The bit value must be added */
275 pSen->SenValue += ((Value >> 7) * SK_LM80_TEMPEXT_LSB);
278 pSen->SenState = SK_SEN_IDLE ;
282 SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_I2C_E007, SKERR_I2C_E007MSG);