1 /******************************************************************************
4 * Project: GEnesis, PCI Gigabit Ethernet Adapter
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 1.1.1.1 2007-03-09 09:43:58 lothar
30 * imported U-Boot 1.1.6
32 * Revision 1.20 2002/08/13 09:16:27 rschmidt
33 * Changed return value for SkLm80ReadSensor() back to 'int'
36 * Revision 1.19 2002/08/06 09:43:31 jschmalz
37 * Extensions and changes for Yukon
39 * Revision 1.18 2002/08/02 12:26:57 rschmidt
42 * Revision 1.17 1999/11/22 13:35:51 cgoos
43 * Changed license header to GPL.
45 * Revision 1.16 1999/05/27 14:05:47 malthoff
46 * Fans: Set SenVal to 0 if the fan value is 0 or 0xff. Both values
47 * are outside the limits (0: div zero error, 0xff: value not in
50 * Revision 1.15 1999/05/27 13:38:51 malthoff
51 * Pervent from Division by zero errors.
53 * Revision 1.14 1999/05/20 09:20:01 cgoos
54 * Changes for 1000Base-T (Fan sensors).
56 * Revision 1.13 1998/10/22 09:48:14 gklug
57 * fix: SysKonnectFileId typo
59 * Revision 1.12 1998/10/09 06:12:06 malthoff
60 * Remove ID_sccs by SysKonnectFileId.
62 * Revision 1.11 1998/09/04 08:33:48 malthoff
63 * bug fix: SenState = SK_SEN_IDLE when
64 * leaving SK_SEN_VALEXT state
66 * Revision 1.10 1998/08/20 12:02:10 gklug
67 * fix: compiler warnings type mismatch
69 * Revision 1.9 1998/08/20 11:37:38 gklug
70 * chg: change Ioc to IoC
72 * Revision 1.8 1998/08/19 12:20:58 gklug
73 * fix: remove struct from C files (see CCC)
75 * Revision 1.7 1998/08/17 07:04:57 malthoff
76 * Take SkLm80RcvReg() function from ski2c.c.
77 * Add IoC parameter to BREAK_OR_WAIT() macro.
79 * Revision 1.6 1998/08/14 07:11:28 malthoff
80 * remove pAc with pAC.
82 * Revision 1.5 1998/08/14 06:46:55 gklug
83 * fix: temperature can get negative
85 * Revision 1.4 1998/08/13 08:27:04 gklug
86 * add: temperature reading now o.k.
87 * fix: pSen declaration, SK_ERR_LOG call, ADDR macro
89 * Revision 1.3 1998/08/13 07:28:21 gklug
90 * fix: pSen was wrong initialized
91 * add: correct conversion for voltage readings
93 * Revision 1.2 1998/08/11 07:52:14 gklug
94 * add: Lm80 read sensor function
96 * Revision 1.1 1998/07/17 09:57:12 gklug
101 ******************************************************************************/
111 static const char SysKonnectFileId[] =
114 #include "h/skdrv1st.h" /* Driver Specific Definitions */
116 #include "h/skdrv2nd.h" /* Adapter Control- and Driver specific Def. */
119 #define BREAK_OR_WAIT(pAC,IoC,Event) SkI2cWait(pAC,IoC,Event)
121 #define BREAK_OR_WAIT(pAC,IoC,Event) break
122 #endif /* nSK_DIAG */
126 * read the register 'Reg' from the device 'Dev'
128 * return read error -1
129 * success the read value
132 SK_IOC IoC, /* Adapter Context */
133 int Dev, /* I2C device address */
134 int Reg) /* register to read */
139 /* Signal device number */
140 if (SkI2cSndDev(IoC, Dev, I2C_WRITE)) {
144 if (SkI2cSndByte(IoC, Reg)) {
149 if (SkI2cSndDev(IoC, Dev, I2C_READ)) {
155 Val = (int)SkI2cRcvByte(IoC, 1);
157 /* First: correct the value: it might be negative */
158 if ((Val & 0x80) != 0) {
159 /* Value is negative */
162 Val = Val * SK_LM80_TEMP_LSB;
165 TempExt = (int)SkLm80RcvReg(IoC, LM80_ADDR, LM80_TEMP_CTRL);
168 Val += ((TempExt >> 7) * SK_LM80_TEMPEXT_LSB);
171 Val -= ((TempExt >> 7) * SK_LM80_TEMPEXT_LSB);
179 Val = (int)SkI2cRcvByte(IoC, 1) * SK_LM80_VT_LSB;
183 Val = (int)SkI2cRcvByte(IoC, 1);
193 * read a sensors value (LM80 specific)
195 * This function reads a sensors value from the I2C sensor chip LM80.
196 * The sensor is defined by its index into the sensors database in the struct
199 * Returns 1 if the read is completed
200 * 0 if the read must be continued (I2C Bus still allocated)
202 int SkLm80ReadSensor(
203 SK_AC *pAC, /* Adapter Context */
204 SK_IOC IoC, /* I/O Context needed in level 1 and 2 */
205 SK_SENSOR *pSen) /* Sensor to be read */
209 switch (pSen->SenState) {
211 /* Send address to ADDR register */
212 SK_I2C_CTL(IoC, I2C_READ, pSen->SenDev, pSen->SenReg, 0);
214 pSen->SenState = SK_SEN_VALUE ;
215 BREAK_OR_WAIT(pAC, IoC, I2C_READ);
218 /* Read value from data register */
219 SK_IN32(IoC, B2_I2C_DATA, ((SK_U32 *)&Value));
221 Value &= 0xff; /* only least significant byte is valid */
223 /* Do NOT check the Value against the thresholds */
224 /* Checking is done in the calling instance */
226 if (pSen->SenType == SK_SEN_VOLT) {
228 pSen->SenValue = Value * SK_LM80_VT_LSB;
229 pSen->SenState = SK_SEN_IDLE ;
233 if (pSen->SenType == SK_SEN_FAN) {
234 if (Value != 0 && Value != 0xff) {
235 /* Fan speed counter */
236 pSen->SenValue = SK_LM80_FAN_FAKTOR/Value;
239 /* Indicate Fan error */
242 pSen->SenState = SK_SEN_IDLE ;
246 /* First: correct the value: it might be negative */
247 if ((Value & 0x80) != 0) {
248 /* Value is negative */
252 /* We have a temperature sensor and need to get the signed extension.
253 * For now we get the extension from the last reading, so in the normal
254 * case we won't see flickering temperatures.
256 pSen->SenValue = (Value * SK_LM80_TEMP_LSB) +
257 (pSen->SenValue % SK_LM80_TEMP_LSB);
259 /* Send address to ADDR register */
260 SK_I2C_CTL(IoC, I2C_READ, pSen->SenDev, LM80_TEMP_CTRL, 0);
262 pSen->SenState = SK_SEN_VALEXT ;
263 BREAK_OR_WAIT(pAC, IoC, I2C_READ);
266 /* Read value from data register */
267 SK_IN32(IoC, B2_I2C_DATA, ((SK_U32 *)&Value));
268 Value &= LM80_TEMP_LSB_9; /* only bit 7 is valid */
270 /* cut the LSB bit */
271 pSen->SenValue = ((pSen->SenValue / SK_LM80_TEMP_LSB) *
274 if (pSen->SenValue < 0) {
275 /* Value negative: The bit value must be subtracted */
276 pSen->SenValue -= ((Value >> 7) * SK_LM80_TEMPEXT_LSB);
279 /* Value positive: The bit value must be added */
280 pSen->SenValue += ((Value >> 7) * SK_LM80_TEMPEXT_LSB);
283 pSen->SenState = SK_SEN_IDLE ;
287 SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_I2C_E007, SKERR_I2C_E007MSG);
295 #endif /* CONFIG_SK98 */