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R.Marek@sh.cvut.cz7f15b662005-05-26 12:42:19 +00001Kernel driver w83781d
2=====================
3
4Supported chips:
5 * Winbond W83781D
6 Prefix: 'w83781d'
7 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
8 Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83781d.pdf
9 * Winbond W83782D
10 Prefix: 'w83782d'
11 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
12 Datasheet: http://www.winbond.com/PDF/sheet/w83782d.pdf
13 * Winbond W83783S
14 Prefix: 'w83783s'
15 Addresses scanned: I2C 0x2d
16 Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83783s.pdf
17 * Winbond W83627HF
18 Prefix: 'w83627hf'
19 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
20 Datasheet: http://www.winbond.com/PDF/sheet/w83627hf.pdf
R.Marek@sh.cvut.cz7f15b662005-05-26 12:42:19 +000021 * Asus AS99127F
22 Prefix: 'as99127f'
23 Addresses scanned: I2C 0x28 - 0x2f
24 Datasheet: Unavailable from Asus
25
26Authors:
27 Frodo Looijaard <frodol@dds.nl>,
28 Philip Edelbrock <phil@netroedge.com>,
29 Mark Studebaker <mdsxyz123@yahoo.com>
30
31Module parameters
32-----------------
33
34* init int
35 (default 1)
36 Use 'init=0' to bypass initializing the chip.
37 Try this if your computer crashes when you load the module.
38
Jean Delvarefabddcd2006-02-05 23:26:51 +010039* reset int
40 (default 0)
41 The driver used to reset the chip on load, but does no more. Use
42 'reset=1' to restore the old behavior. Report if you need to do this.
43
R.Marek@sh.cvut.cz7f15b662005-05-26 12:42:19 +000044force_subclients=bus,caddr,saddr,saddr
45 This is used to force the i2c addresses for subclients of
46 a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b'
47 to force the subclients of chip 0x2d on bus 0 to i2c addresses
48 0x4a and 0x4b. This parameter is useful for certain Tyan boards.
49
50Description
51-----------
52
Jean Delvare7c7a5302005-06-16 19:24:14 +020053This driver implements support for the Winbond W83781D, W83782D, W83783S,
54W83627HF chips, and the Asus AS99127F chips. We will refer to them
55collectively as W8378* chips.
R.Marek@sh.cvut.cz7f15b662005-05-26 12:42:19 +000056
57There is quite some difference between these chips, but they are similar
58enough that it was sensible to put them together in one driver.
59The W83627HF chip is assumed to be identical to the ISA W83782D.
60The Asus chips are similar to an I2C-only W83782D.
61
62Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
63as99127f 7 3 0 3 0x31 0x12c3 yes no
64as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no
65w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes
66w83627hf 9 3 2 3 0x21 0x5ca3 yes yes(LPC)
R.Marek@sh.cvut.cz7f15b662005-05-26 12:42:19 +000067w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes
68w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no
R.Marek@sh.cvut.cz7f15b662005-05-26 12:42:19 +000069
70Detection of these chips can sometimes be foiled because they can be in
71an internal state that allows no clean access. If you know the address
72of the chip, use a 'force' parameter; this will put them into a more
73well-behaved state first.
74
75The W8378* implements temperature sensors (three on the W83781D and W83782D,
76two on the W83783S), three fan rotation speed sensors, voltage sensors
77(seven on the W83781D, nine on the W83782D and six on the W83783S), VID
78lines, alarms with beep warnings, and some miscellaneous stuff.
79
80Temperatures are measured in degrees Celsius. There is always one main
81temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
82sensors. An alarm is triggered for the main sensor once when the
83Overtemperature Shutdown limit is crossed; it is triggered again as soon as
84it drops below the Hysteresis value. A more useful behavior
85can be found by setting the Hysteresis value to +127 degrees Celsius; in
86this case, alarms are issued during all the time when the actual temperature
87is above the Overtemperature Shutdown value. The driver sets the
88hysteresis value for temp1 to 127 at initialization.
89
90For the other temperature sensor(s), an alarm is triggered when the
91temperature gets higher then the Overtemperature Shutdown value; it stays
92on until the temperature falls below the Hysteresis value. But on the
93W83781D, there is only one alarm that functions for both other sensors!
94Temperatures are guaranteed within a range of -55 to +125 degrees. The
95main temperature sensors has a resolution of 1 degree; the other sensor(s)
96of 0.5 degree.
97
98Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
99triggered if the rotation speed has dropped below a programmable limit. Fan
100readings can be divided by a programmable divider (1, 2, 4 or 8 for the
101W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) to give
102the readings more range or accuracy. Not all RPM values can accurately
103be represented, so some rounding is done. With a divider of 2, the lowest
104representable value is around 2600 RPM.
105
106Voltage sensors (also known as IN sensors) report their values in volts.
107An alarm is triggered if the voltage has crossed a programmable minimum
108or maximum limit. Note that minimum in this case always means 'closest to
109zero'; this is important for negative voltage measurements. All voltage
110inputs can measure voltages between 0 and 4.08 volts, with a resolution
111of 0.016 volt.
112
113The VID lines encode the core voltage value: the voltage level your processor
114should work with. This is hardcoded by the mainboard and/or processor itself.
115It is a value in volts. When it is unconnected, you will often find the
116value 3.50 V here.
117
118The W83782D and W83783S temperature conversion machine understands about
119several kinds of temperature probes. You can program the so-called
120beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
121TN3904 transistor, and 3435 the default thermistor value. Other values
122are (not yet) supported.
123
124In addition to the alarms described above, there is a CHAS alarm on the
125chips which triggers if your computer case is open.
126
127When an alarm goes off, you can be warned by a beeping signal through
128your computer speaker. It is possible to enable all beeping globally,
129or only the beeping for some alarms.
130
Jean Delvare41fc4932006-02-05 23:25:25 +0100131Individual alarm and beep bits:
132
1330x000001: in0
1340x000002: in1
1350x000004: in2
1360x000008: in3
1370x000010: temp1
1380x000020: temp2 (+temp3 on W83781D)
1390x000040: fan1
1400x000080: fan2
1410x000100: in4
1420x000200: in5
1430x000400: in6
1440x000800: fan3
1450x001000: chassis
1460x002000: temp3 (W83782D and W83627HF only)
1470x010000: in7 (W83782D and W83627HF only)
1480x020000: in8 (W83782D and W83627HF only)
149
R.Marek@sh.cvut.cz7f15b662005-05-26 12:42:19 +0000150If an alarm triggers, it will remain triggered until the hardware register
151is read at least once. This means that the cause for the alarm may
152already have disappeared! Note that in the current implementation, all
153hardware registers are read whenever any data is read (unless it is less
154than 1.5 seconds since the last update). This means that you can easily
155miss once-only alarms.
156
157The chips only update values each 1.5 seconds; reading them more often
158will do no harm, but will return 'old' values.
159
160AS99127F PROBLEMS
161-----------------
162The as99127f support was developed without the benefit of a datasheet.
163In most cases it is treated as a w83781d (although revision 2 of the
164AS99127F looks more like a w83782d).
165This support will be BETA until a datasheet is released.
166One user has reported problems with fans stopping
167occasionally.
168
169Note that the individual beep bits are inverted from the other chips.
170The driver now takes care of this so that user-space applications
171don't have to know about it.
172
173Known problems:
174 - Problems with diode/thermistor settings (supported?)
175 - One user reports fans stopping under high server load.
176 - Revision 2 seems to have 2 PWM registers but we don't know
177 how to handle them. More details below.
178
179These will not be fixed unless we get a datasheet.
180If you have problems, please lobby Asus to release a datasheet.
181Unfortunately several others have without success.
182Please do not send mail to us asking for better as99127f support.
183We have done the best we can without a datasheet.
184Please do not send mail to the author or the sensors group asking for
185a datasheet or ideas on how to convince Asus. We can't help.
186
187
188NOTES:
189-----
190 783s has no in1 so that in[2-6] are compatible with the 781d/782d.
191
192 783s pin is programmable for -5V or temp1; defaults to -5V,
193 no control in driver so temp1 doesn't work.
194
195 782d and 783s datasheets differ on which is pwm1 and which is pwm2.
196 We chose to follow 782d.
197
198 782d and 783s pin is programmable for fan3 input or pwm2 output;
199 defaults to fan3 input.
200 If pwm2 is enabled (with echo 255 1 > pwm2), then
201 fan3 will report 0.
202
203 782d has pwm1-2 for ISA, pwm1-4 for i2c. (pwm3-4 share pins with
204 the ISA pins)
205
206Data sheet updates:
207------------------
208 - PWM clock registers:
209
210 000: master / 512
211 001: master / 1024
212 010: master / 2048
213 011: master / 4096
214 100: master / 8192
215
216
217Answers from Winbond tech support
218---------------------------------
219>
220> 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
221> reprogramming the R-T table if the Beta of the thermistor is not
222> 3435K. The R-T table is described briefly in section 8.20.
223> What formulas do I use to program a new R-T table for a given Beta?
224>
225 We are sorry that the calculation for R-T table value is
226confidential. If you have another Beta value of thermistor, we can help
227to calculate the R-T table for you. But you should give us real R-T
228Table which can be gotten by thermistor vendor. Therefore we will calculate
229them and obtain 32-byte data, and you can fill the 32-byte data to the
230register in Bank0.CR51 of W83781D.
231
232
233> 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are
234> programmable to be either thermistor or Pentium II diode inputs.
235> How do I program them for diode inputs? I can't find any register
236> to program these to be diode inputs.
237 --> You may program Bank0 CR[5Dh] and CR[59h] registers.
238
239 CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
240
241 thermistor 0 0 0
242 diode 1 1 1
243
244
245(error) CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
246(right) CR[59h] bit 4(VTIN1) bit 5(VTIN2) bit 6(VTIN3)
247
248 PII thermal diode 1 1 1
249 2N3904 diode 0 0 0
250
251
252Asus Clones
253-----------
254
255We have no datasheets for the Asus clones (AS99127F and ASB100 Bach).
256Here are some very useful information that were given to us by Alex Van
257Kaam about how to detect these chips, and how to read their values. He
258also gives advice for another Asus chipset, the Mozart-2 (which we
259don't support yet). Thanks Alex!
260I reworded some parts and added personal comments.
261
262# Detection:
263
264AS99127F rev.1, AS99127F rev.2 and ASB100:
265- I2C address range: 0x29 - 0x2F
266- If register 0x58 holds 0x31 then we have an Asus (either ASB100 or
267 AS99127F)
268- Which one depends on register 0x4F (manufacturer ID):
269 0x06 or 0x94: ASB100
270 0x12 or 0xC3: AS99127F rev.1
271 0x5C or 0xA3: AS99127F rev.2
272 Note that 0x5CA3 is Winbond's ID (WEC), which let us think Asus get their
273 AS99127F rev.2 direct from Winbond. The other codes mean ATT and DVC,
274 respectively. ATT could stand for Asustek something (although it would be
275 very badly chosen IMHO), I don't know what DVC could stand for. Maybe
276 these codes simply aren't meant to be decoded that way.
277
278Mozart-2:
279- I2C address: 0x77
280- If register 0x58 holds 0x56 or 0x10 then we have a Mozart-2
281- Of the Mozart there are 3 types:
282 0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM58 Mozart-2
283 0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K129R Mozart-2
284 0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ??? Mozart-2
285 You can handle all 3 the exact same way :)
286
287# Temperature sensors:
288
289ASB100:
290- sensor 1: register 0x27
291- sensor 2 & 3 are the 2 LM75's on the SMBus
292- sensor 4: register 0x17
293Remark: I noticed that on Intel boards sensor 2 is used for the CPU
294 and 4 is ignored/stuck, on AMD boards sensor 4 is the CPU and sensor 2 is
295 either ignored or a socket temperature.
296
297AS99127F (rev.1 and 2 alike):
298- sensor 1: register 0x27
299- sensor 2 & 3 are the 2 LM75's on the SMBus
300Remark: Register 0x5b is suspected to be temperature type selector. Bit 1
301 would control temp1, bit 3 temp2 and bit 5 temp3.
302
303Mozart-2:
304- sensor 1: register 0x27
305- sensor 2: register 0x13
306
307# Fan sensors:
308
309ASB100, AS99127F (rev.1 and 2 alike):
310- 3 fans, identical to the W83781D
311
312Mozart-2:
313- 2 fans only, 1350000/RPM/div
314- fan 1: register 0x28, divisor on register 0xA1 (bits 4-5)
315- fan 2: register 0x29, divisor on register 0xA1 (bits 6-7)
316
317# Voltages:
318
319This is where there is a difference between AS99127F rev.1 and 2.
320Remark: The difference is similar to the difference between
321 W83781D and W83782D.
322
323ASB100:
324in0=r(0x20)*0.016
325in1=r(0x21)*0.016
326in2=r(0x22)*0.016
327in3=r(0x23)*0.016*1.68
328in4=r(0x24)*0.016*3.8
329in5=r(0x25)*(-0.016)*3.97
330in6=r(0x26)*(-0.016)*1.666
331
332AS99127F rev.1:
333in0=r(0x20)*0.016
334in1=r(0x21)*0.016
335in2=r(0x22)*0.016
336in3=r(0x23)*0.016*1.68
337in4=r(0x24)*0.016*3.8
338in5=r(0x25)*(-0.016)*3.97
339in6=r(0x26)*(-0.016)*1.503
340
341AS99127F rev.2:
342in0=r(0x20)*0.016
343in1=r(0x21)*0.016
344in2=r(0x22)*0.016
345in3=r(0x23)*0.016*1.68
346in4=r(0x24)*0.016*3.8
347in5=(r(0x25)*0.016-3.6)*5.14+3.6
348in6=(r(0x26)*0.016-3.6)*3.14+3.6
349
350Mozart-2:
351in0=r(0x20)*0.016
352in1=255
353in2=r(0x22)*0.016
354in3=r(0x23)*0.016*1.68
355in4=r(0x24)*0.016*4
356in5=255
357in6=255
358
359
360# PWM
361
362Additional info about PWM on the AS99127F (may apply to other Asus
363chips as well) by Jean Delvare as of 2004-04-09:
364
365AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A,
366and a temperature sensor type selector at 0x5B (which basically means
367that they swapped registers 0x59 and 0x5B when you compare with Winbond
368chips).
369Revision 1 of the chip also has the temperature sensor type selector at
3700x5B, but PWM registers have no effect.
371
372We don't know exactly how the temperature sensor type selection works.
373Looks like bits 1-0 are for temp1, bits 3-2 for temp2 and bits 5-4 for
374temp3, although it is possible that only the most significant bit matters
375each time. So far, values other than 0 always broke the readings.
376
377PWM registers seem to be split in two parts: bit 7 is a mode selector,
378while the other bits seem to define a value or threshold.
379
380When bit 7 is clear, bits 6-0 seem to hold a threshold value. If the value
381is below a given limit, the fan runs at low speed. If the value is above
382the limit, the fan runs at full speed. We have no clue as to what the limit
383represents. Note that there seem to be some inertia in this mode, speed
384changes may need some time to trigger. Also, an hysteresis mechanism is
385suspected since walking through all the values increasingly and then
386decreasingly led to slightly different limits.
387
388When bit 7 is set, bits 3-0 seem to hold a threshold value, while bits 6-4
389would not be significant. If the value is below a given limit, the fan runs
390at full speed, while if it is above the limit it runs at low speed (so this
391is the contrary of the other mode, in a way). Here again, we don't know
392what the limit is supposed to represent.
393
394One remarkable thing is that the fans would only have two or three
395different speeds (transitional states left apart), not a whole range as
396you usually get with PWM.
397
398As a conclusion, you can write 0x00 or 0x8F to the PWM registers to make
399fans run at low speed, and 0x7F or 0x80 to make them run at full speed.
400
401Please contact us if you can figure out how it is supposed to work. As
402long as we don't know more, the w83781d driver doesn't handle PWM on
403AS99127F chips at all.
404
405Additional info about PWM on the AS99127F rev.1 by Hector Martin:
406
407I've been fiddling around with the (in)famous 0x59 register and
408found out the following values do work as a form of coarse pwm:
409
4100x80 - seems to turn fans off after some time(1-2 minutes)... might be
411some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an
412old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attemp at Qfan
413that was dropped at the BIOS)
4140x81 - off
4150x82 - slightly "on-ner" than off, but my fans do not get to move. I can
416hear the high-pitched PWM sound that motors give off at too-low-pwm.
4170x83 - now they do move. Estimate about 70% speed or so.
4180x84-0x8f - full on
419
420Changing the high nibble doesn't seem to do much except the high bit
421(0x80) must be set for PWM to work, else the current pwm doesn't seem to
422change.
423
424My mobo is an ASUS A7V266-E. This behavior is similar to what I got
425with speedfan under Windows, where 0-15% would be off, 15-2x% (can't
426remember the exact value) would be 70% and higher would be full on.