1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
|
/******************************************************************************
*
* 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 */
|
