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7f15b664 RM |
1 | Kernel driver w83781d |
2 | ===================== | |
3 | ||
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 | |
7f15b664 RM |
21 | * Asus AS99127F |
22 | Prefix: 'as99127f' | |
23 | Addresses scanned: I2C 0x28 - 0x2f | |
24 | Datasheet: Unavailable from Asus | |
25 | ||
26 | Authors: | |
27 | Frodo Looijaard <frodol@dds.nl>, | |
28 | Philip Edelbrock <phil@netroedge.com>, | |
29 | Mark Studebaker <mdsxyz123@yahoo.com> | |
30 | ||
31 | Module 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 | ||
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. | |
44 | ||
45 | Description | |
46 | ----------- | |
47 | ||
7c7a5304 JD |
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. | |
7f15b664 RM |
51 | |
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. | |
56 | ||
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) | |
7f15b664 RM |
62 | w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes |
63 | w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no | |
7f15b664 RM |
64 | |
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. | |
69 | ||
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. | |
74 | ||
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. | |
84 | ||
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. | |
92 | ||
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. | |
100 | ||
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. | |
107 | ||
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. | |
112 | ||
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. | |
118 | ||
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. | |
121 | ||
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. | |
125 | ||
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. | |
132 | ||
133 | The chips only update values each 1.5 seconds; reading them more often | |
134 | will do no harm, but will return 'old' values. | |
135 | ||
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. | |
144 | ||
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. | |
148 | ||
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. | |
154 | ||
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. | |
162 | ||
163 | ||
164 | NOTES: | |
165 | ----- | |
166 | 783s has no in1 so that in[2-6] are compatible with the 781d/782d. | |
167 | ||
168 | 783s pin is programmable for -5V or temp1; defaults to -5V, | |
169 | no control in driver so temp1 doesn't work. | |
170 | ||
171 | 782d and 783s datasheets differ on which is pwm1 and which is pwm2. | |
172 | We chose to follow 782d. | |
173 | ||
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. | |
178 | ||
179 | 782d has pwm1-2 for ISA, pwm1-4 for i2c. (pwm3-4 share pins with | |
180 | the ISA pins) | |
181 | ||
182 | Data sheet updates: | |
183 | ------------------ | |
184 | - PWM clock registers: | |
185 | ||
186 | 000: master / 512 | |
187 | 001: master / 1024 | |
188 | 010: master / 2048 | |
189 | 011: master / 4096 | |
190 | 100: master / 8192 | |
191 | ||
192 | ||
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. | |
207 | ||
208 | ||
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. | |
214 | ||
215 | CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3) | |
216 | ||
217 | thermistor 0 0 0 | |
218 | diode 1 1 1 | |
219 | ||
220 | ||
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) | |
223 | ||
224 | PII thermal diode 1 1 1 | |
225 | 2N3904 diode 0 0 0 | |
226 | ||
227 | ||
228 | Asus Clones | |
229 | ----------- | |
230 | ||
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. | |
237 | ||
238 | # Detection: | |
239 | ||
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. | |
253 | ||
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 :) | |
262 | ||
263 | # Temperature sensors: | |
264 | ||
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. | |
272 | ||
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. | |
278 | ||
279 | Mozart-2: | |
280 | - sensor 1: register 0x27 | |
281 | - sensor 2: register 0x13 | |
282 | ||
283 | # Fan sensors: | |
284 | ||
285 | ASB100, AS99127F (rev.1 and 2 alike): | |
286 | - 3 fans, identical to the W83781D | |
287 | ||
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) | |
292 | ||
293 | # Voltages: | |
294 | ||
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. | |
298 | ||
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 | |
307 | ||
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 | |
316 | ||
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 | |
325 | ||
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 | |
334 | ||
335 | ||
336 | # PWM | |
337 | ||
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: | |
340 | ||
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. | |
347 | ||
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. | |
352 | ||
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. | |
355 | ||
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. | |
363 | ||
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. | |
369 | ||
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. | |
373 | ||
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. | |
376 | ||
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. | |
380 | ||
381 | Additional info about PWM on the AS99127F rev.1 by Hector Martin: | |
382 | ||
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: | |
385 | ||
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 | |
395 | ||
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. | |
399 | ||
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. |