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 0x290 (8 I/O ports) 11 12 Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83781d.pdf 13 14 * Winbond W83782D 15 16 Prefix: 'w83782d' 17 18 Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports) 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/products/winbond_products/pdfs/PCIC/w83783s.pdf 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 chip. 53 Try this if your computer crashes when you load the module. 54 55 * reset int 56 (default 0) 57 The driver used to reset the chip on load, but does no more. Use 58 'reset=1' to restore the old behavior. Report if you need to do this. 59 60 force_subclients=bus,caddr,saddr,saddr 61 This is used to force the i2c addresses for subclients of 62 a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b` 63 to force the subclients of chip 0x2d on bus 0 to i2c addresses 64 0x4a and 0x4b. This parameter is useful for certain Tyan boards. 65 66 Description 67 ----------- 68 69 This driver implements support for the Winbond W83781D, W83782D, W83783S 70 chips, and the Asus AS99127F chips. We will refer to them collectively as 71 W8378* chips. 72 73 There is quite some difference between these chips, but they are similar 74 enough that it was sensible to put them together in one driver. 75 The Asus chips are similar to an I2C-only W83782D. 76 77 +----------+---------+--------+-------+-------+---------+--------+------+-----+ 78 | Chip | #vin | #fanin | #pwm | #temp | wchipid | vendid | i2c | ISA | 79 +----------+---------+--------+-------+-------+---------+--------+------+-----+ 80 | as99127f | 7 | 3 | 0 | 3 | 0x31 | 0x12c3 | yes | no | 81 +----------+---------+--------+-------+-------+---------+--------+------+-----+ 82 | as99127f rev.2 (type_name = as99127f) | 0x31 | 0x5ca3 | yes | no | 83 +----------+---------+--------+-------+-------+---------+--------+------+-----+ 84 | w83781d | 7 | 3 | 0 | 3 | 0x10-1 | 0x5ca3 | yes | yes | 85 +----------+---------+--------+-------+-------+---------+--------+------+-----+ 86 | w83782d | 9 | 3 | 2-4 | 3 | 0x30 | 0x5ca3 | yes | yes | 87 +----------+---------+--------+-------+-------+---------+--------+------+-----+ 88 | w83783s | 5-6 | 3 | 2 | 1-2 | 0x40 | 0x5ca3 | yes | no | 89 +----------+---------+--------+-------+-------+---------+--------+------+-----+ 90 91 Detection of these chips can sometimes be foiled because they can be in 92 an internal state that allows no clean access. If you know the address 93 of the chip, use a 'force' parameter; this will put them into a more 94 well-behaved state first. 95 96 The W8378* implements temperature sensors (three on the W83781D and W83782D, 97 two on the W83783S), three fan rotation speed sensors, voltage sensors 98 (seven on the W83781D, nine on the W83782D and six on the W83783S), VID 99 lines, alarms with beep warnings, and some miscellaneous stuff. 100 101 Temperatures are measured in degrees Celsius. There is always one main 102 temperature sensor, and one (W83783S) or two (W83781D and W83782D) other 103 sensors. An alarm is triggered for the main sensor once when the 104 Overtemperature Shutdown limit is crossed; it is triggered again as soon as 105 it drops below the Hysteresis value. A more useful behavior 106 can be found by setting the Hysteresis value to +127 degrees Celsius; in 107 this case, alarms are issued during all the time when the actual temperature 108 is above the Overtemperature Shutdown value. The driver sets the 109 hysteresis value for temp1 to 127 at initialization. 110 111 For the other temperature sensor(s), an alarm is triggered when the 112 temperature gets higher then the Overtemperature Shutdown value; it stays 113 on until the temperature falls below the Hysteresis value. But on the 114 W83781D, there is only one alarm that functions for both other sensors! 115 Temperatures are guaranteed within a range of -55 to +125 degrees. The 116 main temperature sensors has a resolution of 1 degree; the other sensor(s) 117 of 0.5 degree. 118 119 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is 120 triggered if the rotation speed has dropped below a programmable limit. Fan 121 readings can be divided by a programmable divider (1, 2, 4 or 8 for the 122 W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) to give 123 the readings more range or accuracy. Not all RPM values can accurately 124 be represented, so some rounding is done. With a divider of 2, the lowest 125 representable value is around 2600 RPM. 126 127 Voltage sensors (also known as IN sensors) report their values in volts. 128 An alarm is triggered if the voltage has crossed a programmable minimum 129 or maximum limit. Note that minimum in this case always means 'closest to 130 zero'; this is important for negative voltage measurements. All voltage 131 inputs can measure voltages between 0 and 4.08 volts, with a resolution 132 of 0.016 volt. 133 134 The VID lines encode the core voltage value: the voltage level your processor 135 should work with. This is hardcoded by the mainboard and/or processor itself. 136 It is a value in volts. When it is unconnected, you will often find the 137 value 3.50 V here. 138 139 The W83782D and W83783S temperature conversion machine understands about 140 several kinds of temperature probes. You can program the so-called 141 beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the 142 TN3904 transistor, and 3435 the default thermistor value. Other values 143 are (not yet) supported. 144 145 In addition to the alarms described above, there is a CHAS alarm on the 146 chips which triggers if your computer case is open. 147 148 When an alarm goes off, you can be warned by a beeping signal through 149 your computer speaker. It is possible to enable all beeping globally, 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 until the hardware register 174 is read at least once. This means that the cause for the alarm may 175 already have disappeared! Note that in the current implementation, all 176 hardware registers are read whenever any data is read (unless it is less 177 than 1.5 seconds since the last update). This means that you can easily 178 miss once-only alarms. 179 180 The chips only update values each 1.5 seconds; reading them more often 181 will do no harm, but will return 'old' values. 182 183 AS99127F PROBLEMS 184 ----------------- 185 The as99127f support was developed without the benefit of a datasheet. 186 In most cases it is treated as a w83781d (although revision 2 of the 187 AS99127F looks more like a w83782d). 188 This support will be BETA until a datasheet is released. 189 One user has reported problems with fans stopping 190 occasionally. 191 192 Note that the individual beep bits are inverted from the other chips. 193 The driver now takes care of this so that user-space applications 194 don't have to know about it. 195 196 Known problems: 197 - Problems with diode/thermistor settings (supported?) 198 - One user reports fans stopping under high server load. 199 - Revision 2 seems to have 2 PWM registers but we don't know 200 how to handle them. More details below. 201 202 These will not be fixed unless we get a datasheet. 203 If you have problems, please lobby Asus to release a datasheet. 204 Unfortunately several others have without success. 205 Please do not send mail to us asking for better as99127f support. 206 We have done the best we can without a datasheet. 207 Please do not send mail to the author or the sensors group asking for 208 a datasheet or ideas on how to convince Asus. We can't help. 209 210 211 NOTES 212 ----- 213 783s has no in1 so that in[2-6] are compatible with the 781d/782d. 214 215 783s pin is programmable for -5V or temp1; defaults to -5V, 216 no control in driver so temp1 doesn't work. 217 218 782d and 783s datasheets differ on which is pwm1 and which is pwm2. 219 We chose to follow 782d. 220 221 782d and 783s pin is programmable for fan3 input or pwm2 output; 222 defaults to fan3 input. 223 If pwm2 is enabled (with echo 255 1 > pwm2), then 224 fan3 will report 0. 225 226 782d has pwm1-2 for ISA, pwm1-4 for i2c. (pwm3-4 share pins with 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 last paragraph, it talks about 246 > reprogramming the R-T table if the Beta of the thermistor is not 247 > 3435K. The R-T table is described briefly in section 8.20. 248 > What formulas do I use to program a new R-T table for a given Beta? 249 > 250 251 We are sorry that the calculation for R-T table value is 252 confidential. If you have another Beta value of thermistor, we can help 253 to calculate the R-T table for you. But you should give us real R-T 254 Table which can be gotten by thermistor vendor. Therefore we will calculate 255 them and obtain 32-byte data, and you can fill the 32-byte data to the 256 register in Bank0.CR51 of W83781D. 257 258 259 > 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are 260 > programmable to be either thermistor or Pentium II diode inputs. 261 > How do I program them for diode inputs? I can't find any register 262 > to program these to be diode inputs. 263 264 You may program Bank0 CR[5Dh] and CR[59h] registers. 265 266 =============================== =============== ============== ============ 267 CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3) 268 269 thermistor 0 0 0 270 diode 1 1 1 271 272 273 (error) CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3) 274 (right) CR[59h] bit 4(VTIN1) bit 5(VTIN2) bit 6(VTIN3) 275 276 PII thermal diode 1 1 1 277 2N3904 diode 0 0 0 278 =============================== =============== ============== ============ 279 280 281 Asus Clones 282 ----------- 283 284 We have no datasheets for the Asus clones (AS99127F and ASB100 Bach). 285 Here are some very useful information that were given to us by Alex Van 286 Kaam about how to detect these chips, and how to read their values. He 287 also gives advice for another Asus chipset, the Mozart-2 (which we 288 don't support yet). Thanks Alex! 289 290 I reworded some parts and added personal comments. 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 Asus (either ASB100 or AS99127F) 298 - Which one depends on register 0x4F (manufacturer ID): 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), which let us think Asus get their 305 AS99127F rev.2 direct from Winbond. The other codes mean ATT and DVC, 306 respectively. ATT could stand for Asustek something (although it would be 307 very badly chosen IMHO), I don't know what DVC could stand for. Maybe 308 these codes simply aren't meant to be decoded that way. 309 310 Mozart-2: 311 - I2C address: 0x77 312 - If register 0x58 holds 0x56 or 0x10 then we have a Mozart-2 313 - Of the Mozart there are 3 types: 314 315 - 0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM58 Mozart-2 316 - 0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K129R Mozart-2 317 - 0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ??? Mozart-2 318 319 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 used for the CPU 332 and 4 is ignored/stuck, on AMD boards sensor 4 is the CPU and sensor 2 is 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 type selector. Bit 1 342 would control temp1, bit 3 temp2 and bit 5 temp3. 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 0xA1 (bits 4-5) 357 - fan 2: register 0x29, divisor on register 0xA1 (bits 6-7) 358 359 Voltages 360 ^^^^^^^^ 361 362 This is where there is a difference between AS99127F rev.1 and 2. 363 364 Remark: 365 366 The difference is similar to the difference between 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 (may apply to other Asus 410 chips as well) by Jean Delvare as of 2004-04-09: 411 412 AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A, 413 and a temperature sensor type selector at 0x5B (which basically means 414 that they swapped registers 0x59 and 0x5B when you compare with Winbond 415 chips). 416 Revision 1 of the chip also has the temperature sensor type selector at 417 0x5B, but PWM registers have no effect. 418 419 We don't know exactly how the temperature sensor type selection works. 420 Looks like bits 1-0 are for temp1, bits 3-2 for temp2 and bits 5-4 for 421 temp3, although it is possible that only the most significant bit matters 422 each time. So far, values other than 0 always broke the readings. 423 424 PWM registers seem to be split in two parts: bit 7 is a mode selector, 425 while the other bits seem to define a value or threshold. 426 427 When bit 7 is clear, bits 6-0 seem to hold a threshold value. If the value 428 is below a given limit, the fan runs at low speed. If the value is above 429 the limit, the fan runs at full speed. We have no clue as to what the limit 430 represents. Note that there seem to be some inertia in this mode, speed 431 changes may need some time to trigger. Also, an hysteresis mechanism is 432 suspected since walking through all the values increasingly and then 433 decreasingly led to slightly different limits. 434 435 When bit 7 is set, bits 3-0 seem to hold a threshold value, while bits 6-4 436 would not be significant. If the value is below a given limit, the fan runs 437 at full speed, while if it is above the limit it runs at low speed (so this 438 is the contrary of the other mode, in a way). Here again, we don't know 439 what the limit is supposed to represent. 440 441 One remarkable thing is that the fans would only have two or three 442 different speeds (transitional states left apart), not a whole range as 443 you usually get with PWM. 444 445 As a conclusion, you can write 0x00 or 0x8F to the PWM registers to make 446 fans run at low speed, and 0x7F or 0x80 to make them run at full speed. 447 448 Please contact us if you can figure out how it is supposed to work. As 449 long as we don't know more, the w83781d driver doesn't handle PWM on 450 AS99127F chips at all. 451 452 * Additional info about PWM on the AS99127F rev.1 by Hector Martin: 453 454 I've been fiddling around with the (in)famous 0x59 register and 455 found out the following values do work as a form of coarse pwm: 456 457 0x80 458 - seems to turn fans off after some time(1-2 minutes)... might be 459 some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an 460 old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attempt at Qfan 461 that was dropped at the BIOS) 462 0x81 463 - off 464 0x82 465 - slightly "on-ner" than off, but my fans do not get to move. I can 466 hear the high-pitched PWM sound that motors give off at too-low-pwm. 467 0x83 468 - now they do move. Estimate about 70% speed or so. 469 0x84-0x8f 470 - full on 471 472 Changing the high nibble doesn't seem to do much except the high bit 473 (0x80) must be set for PWM to work, else the current pwm doesn't seem to 474 change. 475 476 My mobo is an ASUS A7V266-E. This behavior is similar to what I got 477 with speedfan under Windows, where 0-15% would be off, 15-2x% (can't 478 remember the exact value) would be 70% and higher would be full on. 479 480 * Additional info about PWM on the AS99127F rev.1 from lm-sensors 481 ticket #2350: 482 483 I conducted some experiment on Asus P3B-F motherboard with AS99127F 484 (Ver. 1). 485 486 I confirm that 0x59 register control the CPU_Fan Header on this 487 motherboard, and 0x5a register control PWR_Fan. 488 489 In order to reduce the dependency of specific fan, the measurement is 490 conducted with a digital scope without fan connected. I found out that 491 P3B-F actually output variable DC voltage on fan header center pin, 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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