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1 Kernel driver w83781d
2 =====================
4 Supported 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
21 * Asus AS99127F
22 Prefix: 'as99127f'
23 Addresses scanned: I2C 0x28 - 0x2f
24 Datasheet: Unavailable from Asus
26 Authors:
27 Frodo Looijaard <frodol@dds.nl>,
28 Philip Edelbrock <phil@netroedge.com>,
29 Mark Studebaker <mdsxyz123@yahoo.com>
31 Module parameters
32 -----------------
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.
39 force_subclients=bus,caddr,saddr,saddr
40 This is used to force the i2c addresses for subclients of
41 a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b'
42 to force the subclients of chip 0x2d on bus 0 to i2c addresses
43 0x4a and 0x4b. This parameter is useful for certain Tyan boards.
45 Description
46 -----------
48 This driver implements support for the Winbond W83781D, W83782D, W83783S,
49 W83627HF chips, and the Asus AS99127F chips. We will refer to them
50 collectively as W8378* chips.
52 There is quite some difference between these chips, but they are similar
53 enough that it was sensible to put them together in one driver.
54 The W83627HF chip is assumed to be identical to the ISA W83782D.
55 The Asus chips are similar to an I2C-only W83782D.
57 Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
58 as99127f 7 3 0 3 0x31 0x12c3 yes no
59 as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no
60 w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes
61 w83627hf 9 3 2 3 0x21 0x5ca3 yes yes(LPC)
62 w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes
63 w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no
65 Detection of these chips can sometimes be foiled because they can be in
66 an internal state that allows no clean access. If you know the address
67 of the chip, use a 'force' parameter; this will put them into a more
68 well-behaved state first.
70 The W8378* implements temperature sensors (three on the W83781D and W83782D,
71 two on the W83783S), three fan rotation speed sensors, voltage sensors
72 (seven on the W83781D, nine on the W83782D and six on the W83783S), VID
73 lines, alarms with beep warnings, and some miscellaneous stuff.
75 Temperatures are measured in degrees Celsius. There is always one main
76 temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
77 sensors. An alarm is triggered for the main sensor once when the
78 Overtemperature Shutdown limit is crossed; it is triggered again as soon as
79 it drops below the Hysteresis value. A more useful behavior
80 can be found by setting the Hysteresis value to +127 degrees Celsius; in
81 this case, alarms are issued during all the time when the actual temperature
82 is above the Overtemperature Shutdown value. The driver sets the
83 hysteresis value for temp1 to 127 at initialization.
85 For the other temperature sensor(s), an alarm is triggered when the
86 temperature gets higher then the Overtemperature Shutdown value; it stays
87 on until the temperature falls below the Hysteresis value. But on the
88 W83781D, there is only one alarm that functions for both other sensors!
89 Temperatures are guaranteed within a range of -55 to +125 degrees. The
90 main temperature sensors has a resolution of 1 degree; the other sensor(s)
91 of 0.5 degree.
93 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
94 triggered if the rotation speed has dropped below a programmable limit. Fan
95 readings can be divided by a programmable divider (1, 2, 4 or 8 for the
96 W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) to give
97 the readings more range or accuracy. Not all RPM values can accurately
98 be represented, so some rounding is done. With a divider of 2, the lowest
99 representable value is around 2600 RPM.
101 Voltage sensors (also known as IN sensors) report their values in volts.
102 An alarm is triggered if the voltage has crossed a programmable minimum
103 or maximum limit. Note that minimum in this case always means 'closest to
104 zero'; this is important for negative voltage measurements. All voltage
105 inputs can measure voltages between 0 and 4.08 volts, with a resolution
106 of 0.016 volt.
108 The VID lines encode the core voltage value: the voltage level your processor
109 should work with. This is hardcoded by the mainboard and/or processor itself.
110 It is a value in volts. When it is unconnected, you will often find the
111 value 3.50 V here.
113 The W83782D and W83783S temperature conversion machine understands about
114 several kinds of temperature probes. You can program the so-called
115 beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
116 TN3904 transistor, and 3435 the default thermistor value. Other values
117 are (not yet) supported.
119 In addition to the alarms described above, there is a CHAS alarm on the
120 chips which triggers if your computer case is open.
122 When an alarm goes off, you can be warned by a beeping signal through
123 your computer speaker. It is possible to enable all beeping globally,
124 or only the beeping for some alarms.
126 If an alarm triggers, it will remain triggered until the hardware register
127 is read at least once. This means that the cause for the alarm may
128 already have disappeared! Note that in the current implementation, all
129 hardware registers are read whenever any data is read (unless it is less
130 than 1.5 seconds since the last update). This means that you can easily
131 miss once-only alarms.
133 The chips only update values each 1.5 seconds; reading them more often
134 will do no harm, but will return 'old' values.
136 AS99127F PROBLEMS
137 -----------------
138 The as99127f support was developed without the benefit of a datasheet.
139 In most cases it is treated as a w83781d (although revision 2 of the
140 AS99127F looks more like a w83782d).
141 This support will be BETA until a datasheet is released.
142 One user has reported problems with fans stopping
143 occasionally.
145 Note that the individual beep bits are inverted from the other chips.
146 The driver now takes care of this so that user-space applications
147 don't have to know about it.
149 Known problems:
150 - Problems with diode/thermistor settings (supported?)
151 - One user reports fans stopping under high server load.
152 - Revision 2 seems to have 2 PWM registers but we don't know
153 how to handle them. More details below.
155 These will not be fixed unless we get a datasheet.
156 If you have problems, please lobby Asus to release a datasheet.
157 Unfortunately several others have without success.
158 Please do not send mail to us asking for better as99127f support.
159 We have done the best we can without a datasheet.
160 Please do not send mail to the author or the sensors group asking for
161 a datasheet or ideas on how to convince Asus. We can't help.
164 NOTES:
165 -----
166 783s has no in1 so that in[2-6] are compatible with the 781d/782d.
168 783s pin is programmable for -5V or temp1; defaults to -5V,
169 no control in driver so temp1 doesn't work.
171 782d and 783s datasheets differ on which is pwm1 and which is pwm2.
172 We chose to follow 782d.
174 782d and 783s pin is programmable for fan3 input or pwm2 output;
175 defaults to fan3 input.
176 If pwm2 is enabled (with echo 255 1 > pwm2), then
177 fan3 will report 0.
179 782d has pwm1-2 for ISA, pwm1-4 for i2c. (pwm3-4 share pins with
180 the ISA pins)
182 Data sheet updates:
183 ------------------
184 - PWM clock registers:
186 000: master / 512
187 001: master / 1024
188 010: master / 2048
189 011: master / 4096
190 100: master / 8192
193 Answers from Winbond tech support
194 ---------------------------------
195 >
196 > 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
197 > reprogramming the R-T table if the Beta of the thermistor is not
198 > 3435K. The R-T table is described briefly in section 8.20.
199 > What formulas do I use to program a new R-T table for a given Beta?
200 >
201 We are sorry that the calculation for R-T table value is
202 confidential. If you have another Beta value of thermistor, we can help
203 to calculate the R-T table for you. But you should give us real R-T
204 Table which can be gotten by thermistor vendor. Therefore we will calculate
205 them and obtain 32-byte data, and you can fill the 32-byte data to the
206 register in Bank0.CR51 of W83781D.
209 > 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are
210 > programmable to be either thermistor or Pentium II diode inputs.
211 > How do I program them for diode inputs? I can't find any register
212 > to program these to be diode inputs.
213 --> You may program Bank0 CR[5Dh] and CR[59h] registers.
215 CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
217 thermistor 0 0 0
218 diode 1 1 1
221 (error) CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
222 (right) CR[59h] bit 4(VTIN1) bit 5(VTIN2) bit 6(VTIN3)
224 PII thermal diode 1 1 1
225 2N3904 diode 0 0 0
228 Asus Clones
229 -----------
231 We have no datasheets for the Asus clones (AS99127F and ASB100 Bach).
232 Here are some very useful information that were given to us by Alex Van
233 Kaam about how to detect these chips, and how to read their values. He
234 also gives advice for another Asus chipset, the Mozart-2 (which we
235 don't support yet). Thanks Alex!
236 I reworded some parts and added personal comments.
238 # Detection:
240 AS99127F rev.1, AS99127F rev.2 and ASB100:
241 - I2C address range: 0x29 - 0x2F
242 - If register 0x58 holds 0x31 then we have an Asus (either ASB100 or
243 AS99127F)
244 - Which one depends on register 0x4F (manufacturer ID):
245 0x06 or 0x94: ASB100
246 0x12 or 0xC3: AS99127F rev.1
247 0x5C or 0xA3: AS99127F rev.2
248 Note that 0x5CA3 is Winbond's ID (WEC), which let us think Asus get their
249 AS99127F rev.2 direct from Winbond. The other codes mean ATT and DVC,
250 respectively. ATT could stand for Asustek something (although it would be
251 very badly chosen IMHO), I don't know what DVC could stand for. Maybe
252 these codes simply aren't meant to be decoded that way.
254 Mozart-2:
255 - I2C address: 0x77
256 - If register 0x58 holds 0x56 or 0x10 then we have a Mozart-2
257 - Of the Mozart there are 3 types:
258 0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM58 Mozart-2
259 0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K129R Mozart-2
260 0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ??? Mozart-2
261 You can handle all 3 the exact same way :)
263 # Temperature sensors:
265 ASB100:
266 - sensor 1: register 0x27
267 - sensor 2 & 3 are the 2 LM75's on the SMBus
268 - sensor 4: register 0x17
269 Remark: I noticed that on Intel boards sensor 2 is used for the CPU
270 and 4 is ignored/stuck, on AMD boards sensor 4 is the CPU and sensor 2 is
271 either ignored or a socket temperature.
273 AS99127F (rev.1 and 2 alike):
274 - sensor 1: register 0x27
275 - sensor 2 & 3 are the 2 LM75's on the SMBus
276 Remark: Register 0x5b is suspected to be temperature type selector. Bit 1
277 would control temp1, bit 3 temp2 and bit 5 temp3.
279 Mozart-2:
280 - sensor 1: register 0x27
281 - sensor 2: register 0x13
283 # Fan sensors:
285 ASB100, AS99127F (rev.1 and 2 alike):
286 - 3 fans, identical to the W83781D
288 Mozart-2:
289 - 2 fans only, 1350000/RPM/div
290 - fan 1: register 0x28, divisor on register 0xA1 (bits 4-5)
291 - fan 2: register 0x29, divisor on register 0xA1 (bits 6-7)
293 # Voltages:
295 This is where there is a difference between AS99127F rev.1 and 2.
296 Remark: The difference is similar to the difference between
297 W83781D and W83782D.
299 ASB100:
300 in0=r(0x20)*0.016
301 in1=r(0x21)*0.016
302 in2=r(0x22)*0.016
303 in3=r(0x23)*0.016*1.68
304 in4=r(0x24)*0.016*3.8
305 in5=r(0x25)*(-0.016)*3.97
306 in6=r(0x26)*(-0.016)*1.666
308 AS99127F rev.1:
309 in0=r(0x20)*0.016
310 in1=r(0x21)*0.016
311 in2=r(0x22)*0.016
312 in3=r(0x23)*0.016*1.68
313 in4=r(0x24)*0.016*3.8
314 in5=r(0x25)*(-0.016)*3.97
315 in6=r(0x26)*(-0.016)*1.503
317 AS99127F rev.2:
318 in0=r(0x20)*0.016
319 in1=r(0x21)*0.016
320 in2=r(0x22)*0.016
321 in3=r(0x23)*0.016*1.68
322 in4=r(0x24)*0.016*3.8
323 in5=(r(0x25)*0.016-3.6)*5.14+3.6
324 in6=(r(0x26)*0.016-3.6)*3.14+3.6
326 Mozart-2:
327 in0=r(0x20)*0.016
328 in1=255
329 in2=r(0x22)*0.016
330 in3=r(0x23)*0.016*1.68
331 in4=r(0x24)*0.016*4
332 in5=255
333 in6=255
336 # PWM
338 Additional info about PWM on the AS99127F (may apply to other Asus
339 chips as well) by Jean Delvare as of 2004-04-09:
341 AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A,
342 and a temperature sensor type selector at 0x5B (which basically means
343 that they swapped registers 0x59 and 0x5B when you compare with Winbond
344 chips).
345 Revision 1 of the chip also has the temperature sensor type selector at
346 0x5B, but PWM registers have no effect.
348 We don't know exactly how the temperature sensor type selection works.
349 Looks like bits 1-0 are for temp1, bits 3-2 for temp2 and bits 5-4 for
350 temp3, although it is possible that only the most significant bit matters
351 each time. So far, values other than 0 always broke the readings.
353 PWM registers seem to be split in two parts: bit 7 is a mode selector,
354 while the other bits seem to define a value or threshold.
356 When bit 7 is clear, bits 6-0 seem to hold a threshold value. If the value
357 is below a given limit, the fan runs at low speed. If the value is above
358 the limit, the fan runs at full speed. We have no clue as to what the limit
359 represents. Note that there seem to be some inertia in this mode, speed
360 changes may need some time to trigger. Also, an hysteresis mechanism is
361 suspected since walking through all the values increasingly and then
362 decreasingly led to slightly different limits.
364 When bit 7 is set, bits 3-0 seem to hold a threshold value, while bits 6-4
365 would not be significant. If the value is below a given limit, the fan runs
366 at full speed, while if it is above the limit it runs at low speed (so this
367 is the contrary of the other mode, in a way). Here again, we don't know
368 what the limit is supposed to represent.
370 One remarkable thing is that the fans would only have two or three
371 different speeds (transitional states left apart), not a whole range as
372 you usually get with PWM.
374 As a conclusion, you can write 0x00 or 0x8F to the PWM registers to make
375 fans run at low speed, and 0x7F or 0x80 to make them run at full speed.
377 Please contact us if you can figure out how it is supposed to work. As
378 long as we don't know more, the w83781d driver doesn't handle PWM on
379 AS99127F chips at all.
381 Additional info about PWM on the AS99127F rev.1 by Hector Martin:
383 I've been fiddling around with the (in)famous 0x59 register and
384 found out the following values do work as a form of coarse pwm:
386 0x80 - seems to turn fans off after some time(1-2 minutes)... might be
387 some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an
388 old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attemp at Qfan
389 that was dropped at the BIOS)
390 0x81 - off
391 0x82 - slightly "on-ner" than off, but my fans do not get to move. I can
392 hear the high-pitched PWM sound that motors give off at too-low-pwm.
393 0x83 - now they do move. Estimate about 70% speed or so.
394 0x84-0x8f - full on
396 Changing the high nibble doesn't seem to do much except the high bit
397 (0x80) must be set for PWM to work, else the current pwm doesn't seem to
398 change.
400 My mobo is an ASUS A7V266-E. This behavior is similar to what I got
401 with speedfan under Windows, where 0-15% would be off, 15-2x% (can't
402 remember the exact value) would be 70% and higher would be full on.