1 Kernel driver w83781d
2 =====================
3
4 Supported chips:
5
6 * Winbond W83781D
7
8 Prefix: 'w83781d'
9
10 Addresses scanned: I2C 0x28 - 0x2f, ISA 0x
11
12 Datasheet: http://www.winbond-usa.com/prod
13
14 * Winbond W83782D
15
16 Prefix: 'w83782d'
17
18 Addresses scanned: I2C 0x28 - 0x2f, ISA 0x
19
20 Datasheet: https://www.winbond.com
21
22 * Winbond W83783S
23
24 Prefix: 'w83783s'
25
26 Addresses scanned: I2C 0x2d
27
28 Datasheet: http://www.winbond-usa.com/prod
29
30 * Asus AS99127F
31
32 Prefix: 'as99127f'
33
34 Addresses scanned: I2C 0x28 - 0x2f
35
36 Datasheet: Unavailable from Asus
37
38
39
40 Authors:
41
42 - Frodo Looijaard <frodol@dds.nl>,
43 - Philip Edelbrock <phil@netroedge.com>,
44 - Mark Studebaker <mdsxyz123@yahoo.com>
45
46 Module parameters
47 -----------------
48
49 * init int
50 (default 1)
51
52 Use 'init=0' to bypass initializing the ch
53 Try this if your computer crashes when you
54
55 * reset int
56 (default 0)
57 The driver used to reset the chip on load,
58 'reset=1' to restore the old behavior. Rep
59
60 force_subclients=bus,caddr,saddr,saddr
61 This is used to force the i2c addresses for
62 a certain chip. Typical usage is `force_subc
63 to force the subclients of chip 0x2d on bus
64 0x4a and 0x4b. This parameter is useful for
65
66 Description
67 -----------
68
69 This driver implements support for the Winbond
70 chips, and the Asus AS99127F chips. We will re
71 W8378* chips.
72
73 There is quite some difference between these c
74 enough that it was sensible to put them togeth
75 The Asus chips are similar to an I2C-only W837
76
77 +----------+---------+--------+-------+-------
78 | Chip | #vin | #fanin | #pwm | #temp
79 +----------+---------+--------+-------+-------
80 | as99127f | 7 | 3 | 0 | 3
81 +----------+---------+--------+-------+-------
82 | as99127f rev.2 (type_name = as99127f)
83 +----------+---------+--------+-------+-------
84 | w83781d | 7 | 3 | 0 | 3
85 +----------+---------+--------+-------+-------
86 | w83782d | 9 | 3 | 2-4 | 3
87 +----------+---------+--------+-------+-------
88 | w83783s | 5-6 | 3 | 2 | 1-2
89 +----------+---------+--------+-------+-------
90
91 Detection of these chips can sometimes be foil
92 an internal state that allows no clean access.
93 of the chip, use a 'force' parameter; this wil
94 well-behaved state first.
95
96 The W8378* implements temperature sensors (thr
97 two on the W83783S), three fan rotation speed
98 (seven on the W83781D, nine on the W83782D and
99 lines, alarms with beep warnings, and some mis
100
101 Temperatures are measured in degrees Celsius.
102 temperature sensor, and one (W83783S) or two (
103 sensors. An alarm is triggered for the main se
104 Overtemperature Shutdown limit is crossed; it
105 it drops below the Hysteresis value. A more us
106 can be found by setting the Hysteresis value t
107 this case, alarms are issued during all the ti
108 is above the Overtemperature Shutdown value. T
109 hysteresis value for temp1 to 127 at initializ
110
111 For the other temperature sensor(s), an alarm
112 temperature gets higher then the Overtemperatu
113 on until the temperature falls below the Hyste
114 W83781D, there is only one alarm that function
115 Temperatures are guaranteed within a range of
116 main temperature sensors has a resolution of 1
117 of 0.5 degree.
118
119 Fan rotation speeds are reported in RPM (rotat
120 triggered if the rotation speed has dropped be
121 readings can be divided by a programmable divi
122 W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the
123 the readings more range or accuracy. Not all R
124 be represented, so some rounding is done. With
125 representable value is around 2600 RPM.
126
127 Voltage sensors (also known as IN sensors) rep
128 An alarm is triggered if the voltage has cross
129 or maximum limit. Note that minimum in this ca
130 zero'; this is important for negative voltage
131 inputs can measure voltages between 0 and 4.08
132 of 0.016 volt.
133
134 The VID lines encode the core voltage value: t
135 should work with. This is hardcoded by the mai
136 It is a value in volts. When it is unconnected
137 value 3.50 V here.
138
139 The W83782D and W83783S temperature conversion
140 several kinds of temperature probes. You can p
141 beta value in the sensor files. '1' is the PII
142 TN3904 transistor, and 3435 the default thermi
143 are (not yet) supported.
144
145 In addition to the alarms described above, the
146 chips which triggers if your computer case is
147
148 When an alarm goes off, you can be warned by a
149 your computer speaker. It is possible to enabl
150 or only the beeping for some alarms.
151
152 Individual alarm and beep bits:
153
154 ======== ==========================
155 0x000001 in0
156 0x000002 in1
157 0x000004 in2
158 0x000008 in3
159 0x000010 temp1
160 0x000020 temp2 (+temp3 on W83781D)
161 0x000040 fan1
162 0x000080 fan2
163 0x000100 in4
164 0x000200 in5
165 0x000400 in6
166 0x000800 fan3
167 0x001000 chassis
168 0x002000 temp3 (W83782D only)
169 0x010000 in7 (W83782D only)
170 0x020000 in8 (W83782D only)
171 ======== ==========================
172
173 If an alarm triggers, it will remain triggered
174 is read at least once. This means that the cau
175 already have disappeared! Note that in the cur
176 hardware registers are read whenever any data
177 than 1.5 seconds since the last update). This
178 miss once-only alarms.
179
180 The chips only update values each 1.5 seconds;
181 will do no harm, but will return 'old' values.
182
183 AS99127F PROBLEMS
184 -----------------
185 The as99127f support was developed without the
186 In most cases it is treated as a w83781d (alth
187 AS99127F looks more like a w83782d).
188 This support will be BETA until a datasheet is
189 One user has reported problems with fans stopp
190 occasionally.
191
192 Note that the individual beep bits are inverte
193 The driver now takes care of this so that user
194 don't have to know about it.
195
196 Known problems:
197 - Problems with diode/thermistor setti
198 - One user reports fans stopping under
199 - Revision 2 seems to have 2 PWM regis
200 how to handle them. More details bel
201
202 These will not be fixed unless we get a datash
203 If you have problems, please lobby Asus to rel
204 Unfortunately several others have without succ
205 Please do not send mail to us asking for bette
206 We have done the best we can without a datashe
207 Please do not send mail to the author or the s
208 a datasheet or ideas on how to convince Asus.
209
210
211 NOTES
212 -----
213 783s has no in1 so that in[2-6] are compatib
214
215 783s pin is programmable for -5V or temp1; d
216 no control in driver so temp1 doesn't work.
217
218 782d and 783s datasheets differ on which is
219 We chose to follow 782d.
220
221 782d and 783s pin is programmable for fan3 i
222 defaults to fan3 input.
223 If pwm2 is enabled (with echo 255 1 > pwm2),
224 fan3 will report 0.
225
226 782d has pwm1-2 for ISA, pwm1-4 for i2c. (pw
227 the ISA pins)
228
229 Data sheet updates
230 ------------------
231 - PWM clock registers:
232 * 000: master / 512
233 * 001: master / 1024
234 * 010: master / 2048
235 * 011: master / 4096
236 * 100: master / 8192
237
238
239 Answers from Winbond tech support
240 ---------------------------------
241
242 ::
243
244 >
245 > 1) In the W83781D data sheet section 7.2 l
246 > reprogramming the R-T table if the Beta
247 > 3435K. The R-T table is described brief
248 > What formulas do I use to program a new
249 >
250
251 We are sorry that the calculation for R-T ta
252 confidential. If you have another Beta value
253 to calculate the R-T table for you. But you
254 Table which can be gotten by thermistor vend
255 them and obtain 32-byte data, and you can fi
256 register in Bank0.CR51 of W83781D.
257
258
259 > 2) In the W83782D data sheet, it mentions
260 > programmable to be either thermistor or
261 > How do I program them for diode inputs?
262 > to program these to be diode inputs.
263
264 You may program Bank0 CR[5Dh] and CR[59h] re
265
266 =============================== ============
267 CR[5Dh] bit 1(VTIN1)
268
269 thermistor 0
270 diode 1
271
272
273 (error) CR[59h] bit 4(VTIN1)
274 (right) CR[59h] bit 4(VTIN1)
275
276 PII thermal diode 1
277 2N3904 diode 0
278 =============================== ============
279
280
281 Asus Clones
282 -----------
283
284 We have no datasheets for the Asus clones (AS9
285 Here are some very useful information that wer
286 Kaam about how to detect these chips, and how
287 also gives advice for another Asus chipset, th
288 don't support yet). Thanks Alex!
289
290 I reworded some parts and added personal comme
291
292 Detection
293 ^^^^^^^^^
294
295 AS99127F rev.1, AS99127F rev.2 and ASB100:
296 - I2C address range: 0x29 - 0x2F
297 - If register 0x58 holds 0x31 then we have an
298 - Which one depends on register 0x4F (manufact
299
300 - 0x06 or 0x94: ASB100
301 - 0x12 or 0xC3: AS99127F rev.1
302 - 0x5C or 0xA3: AS99127F rev.2
303
304 Note that 0x5CA3 is Winbond's ID (WEC), whic
305 AS99127F rev.2 direct from Winbond. The othe
306 respectively. ATT could stand for Asustek so
307 very badly chosen IMHO), I don't know what D
308 these codes simply aren't meant to be decode
309
310 Mozart-2:
311 - I2C address: 0x77
312 - If register 0x58 holds 0x56 or 0x10 then we
313 - Of the Mozart there are 3 types:
314
315 - 0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM5
316 - 0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K
317 - 0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ???
318
319 You can handle all 3 the exact same way :)
320
321 Temperature sensors
322 ^^^^^^^^^^^^^^^^^^^
323
324 ASB100:
325 - sensor 1: register 0x27
326 - sensor 2 & 3 are the 2 LM75's on the SMBus
327 - sensor 4: register 0x17
328
329 Remark:
330
331 I noticed that on Intel boards sensor 2 is u
332 and 4 is ignored/stuck, on AMD boards sensor
333 either ignored or a socket temperature.
334
335 AS99127F (rev.1 and 2 alike):
336 - sensor 1: register 0x27
337 - sensor 2 & 3 are the 2 LM75's on the SMBus
338
339 Remark:
340
341 Register 0x5b is suspected to be temperature
342 would control temp1, bit 3 temp2 and bit 5 t
343
344 Mozart-2:
345 - sensor 1: register 0x27
346 - sensor 2: register 0x13
347
348 Fan sensors
349 ^^^^^^^^^^^
350
351 ASB100, AS99127F (rev.1 and 2 alike):
352 - 3 fans, identical to the W83781D
353
354 Mozart-2:
355 - 2 fans only, 1350000/RPM/div
356 - fan 1: register 0x28, divisor on register
357 - fan 2: register 0x29, divisor on register
358
359 Voltages
360 ^^^^^^^^
361
362 This is where there is a difference between AS
363
364 Remark:
365
366 The difference is similar to the difference
367 W83781D and W83782D.
368
369 ASB100:
370 - in0=r(0x20)*0.016
371 - in1=r(0x21)*0.016
372 - in2=r(0x22)*0.016
373 - in3=r(0x23)*0.016*1.68
374 - in4=r(0x24)*0.016*3.8
375 - in5=r(0x25)*(-0.016)*3.97
376 - in6=r(0x26)*(-0.016)*1.666
377
378 AS99127F rev.1:
379 - in0=r(0x20)*0.016
380 - in1=r(0x21)*0.016
381 - in2=r(0x22)*0.016
382 - in3=r(0x23)*0.016*1.68
383 - in4=r(0x24)*0.016*3.8
384 - in5=r(0x25)*(-0.016)*3.97
385 - in6=r(0x26)*(-0.016)*1.503
386
387 AS99127F rev.2:
388 - in0=r(0x20)*0.016
389 - in1=r(0x21)*0.016
390 - in2=r(0x22)*0.016
391 - in3=r(0x23)*0.016*1.68
392 - in4=r(0x24)*0.016*3.8
393 - in5=(r(0x25)*0.016-3.6)*5.14+3.6
394 - in6=(r(0x26)*0.016-3.6)*3.14+3.6
395
396 Mozart-2:
397 - in0=r(0x20)*0.016
398 - in1=255
399 - in2=r(0x22)*0.016
400 - in3=r(0x23)*0.016*1.68
401 - in4=r(0x24)*0.016*4
402 - in5=255
403 - in6=255
404
405
406 PWM
407 ^^^
408
409 * Additional info about PWM on the AS99127F (m
410 chips as well) by Jean Delvare as of 2004-04
411
412 AS99127F revision 2 seems to have two PWM regi
413 and a temperature sensor type selector at 0x5B
414 that they swapped registers 0x59 and 0x5B when
415 chips).
416 Revision 1 of the chip also has the temperatur
417 0x5B, but PWM registers have no effect.
418
419 We don't know exactly how the temperature sens
420 Looks like bits 1-0 are for temp1, bits 3-2 fo
421 temp3, although it is possible that only the m
422 each time. So far, values other than 0 always
423
424 PWM registers seem to be split in two parts: b
425 while the other bits seem to define a value or
426
427 When bit 7 is clear, bits 6-0 seem to hold a t
428 is below a given limit, the fan runs at low sp
429 the limit, the fan runs at full speed. We have
430 represents. Note that there seem to be some in
431 changes may need some time to trigger. Also, a
432 suspected since walking through all the values
433 decreasingly led to slightly different limits.
434
435 When bit 7 is set, bits 3-0 seem to hold a thr
436 would not be significant. If the value is belo
437 at full speed, while if it is above the limit
438 is the contrary of the other mode, in a way).
439 what the limit is supposed to represent.
440
441 One remarkable thing is that the fans would on
442 different speeds (transitional states left apa
443 you usually get with PWM.
444
445 As a conclusion, you can write 0x00 or 0x8F to
446 fans run at low speed, and 0x7F or 0x80 to mak
447
448 Please contact us if you can figure out how it
449 long as we don't know more, the w83781d driver
450 AS99127F chips at all.
451
452 * Additional info about PWM on the AS99127F re
453
454 I've been fiddling around with the (in)famous
455 found out the following values do work as a fo
456
457 0x80
458 - seems to turn fans off after some time(1-2
459 some form of auto-fan-control based on temp
460 old ASUS, it isn't marketed as Qfan. Maybe
461 that was dropped at the BIOS)
462 0x81
463 - off
464 0x82
465 - slightly "on-ner" than off, but my fans do
466 hear the high-pitched PWM sound that motors
467 0x83
468 - now they do move. Estimate about 70% speed
469 0x84-0x8f
470 - full on
471
472 Changing the high nibble doesn't seem to do mu
473 (0x80) must be set for PWM to work, else the c
474 change.
475
476 My mobo is an ASUS A7V266-E. This behavior is
477 with speedfan under Windows, where 0-15% would
478 remember the exact value) would be 70% and hig
479
480 * Additional info about PWM on the AS99127F re
481 ticket #2350:
482
483 I conducted some experiment on Asus P3B-F moth
484 (Ver. 1).
485
486 I confirm that 0x59 register control the CPU_F
487 motherboard, and 0x5a register control PWR_Fan
488
489 In order to reduce the dependency of specific
490 conducted with a digital scope without fan con
491 P3B-F actually output variable DC voltage on f
492 looks like PWM is filtered on this motherboard
493
494 Here are some of measurements:
495
496 ==== =========
497 0x80 20 mV
498 0x81 20 mV
499 0x82 232 mV
500 0x83 1.2 V
501 0x84 2.31 V
502 0x85 3.44 V
503 0x86 4.62 V
504 0x87 5.81 V
505 0x88 7.01 V
506 9x89 8.22 V
507 0x8a 9.42 V
508 0x8b 10.6 V
509 0x8c 11.9 V
510 0x8d 12.4 V
511 0x8e 12.4 V
512 0x8f 12.4 V
513 ==== =========
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