w83781d 16 KB

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  1. Kernel driver w83781d
  2. =====================
  3. Supported chips:
  4. * Winbond W83781D
  5. Prefix: 'w83781d'
  6. Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
  7. Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83781d.pdf
  8. * Winbond W83782D
  9. Prefix: 'w83782d'
  10. Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
  11. Datasheet: http://www.winbond.com/PDF/sheet/w83782d.pdf
  12. * Winbond W83783S
  13. Prefix: 'w83783s'
  14. Addresses scanned: I2C 0x2d
  15. Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83783s.pdf
  16. * Winbond W83627HF
  17. Prefix: 'w83627hf'
  18. Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
  19. Datasheet: http://www.winbond.com/PDF/sheet/w83627hf.pdf
  20. * Asus AS99127F
  21. Prefix: 'as99127f'
  22. Addresses scanned: I2C 0x28 - 0x2f
  23. Datasheet: Unavailable from Asus
  24. Authors:
  25. Frodo Looijaard <frodol@dds.nl>,
  26. Philip Edelbrock <phil@netroedge.com>,
  27. Mark Studebaker <mdsxyz123@yahoo.com>
  28. Module parameters
  29. -----------------
  30. * init int
  31. (default 1)
  32. Use 'init=0' to bypass initializing the chip.
  33. Try this if your computer crashes when you load the module.
  34. * reset int
  35. (default 0)
  36. The driver used to reset the chip on load, but does no more. Use
  37. 'reset=1' to restore the old behavior. Report if you need to do this.
  38. force_subclients=bus,caddr,saddr,saddr
  39. This is used to force the i2c addresses for subclients of
  40. a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b'
  41. to force the subclients of chip 0x2d on bus 0 to i2c addresses
  42. 0x4a and 0x4b. This parameter is useful for certain Tyan boards.
  43. Description
  44. -----------
  45. This driver implements support for the Winbond W83781D, W83782D, W83783S,
  46. W83627HF chips, and the Asus AS99127F chips. We will refer to them
  47. collectively as W8378* chips.
  48. There is quite some difference between these chips, but they are similar
  49. enough that it was sensible to put them together in one driver.
  50. The W83627HF chip is assumed to be identical to the ISA W83782D.
  51. The Asus chips are similar to an I2C-only W83782D.
  52. Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
  53. as99127f 7 3 0 3 0x31 0x12c3 yes no
  54. as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no
  55. w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes
  56. w83627hf 9 3 2 3 0x21 0x5ca3 yes yes(LPC)
  57. w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes
  58. w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no
  59. Detection of these chips can sometimes be foiled because they can be in
  60. an internal state that allows no clean access. If you know the address
  61. of the chip, use a 'force' parameter; this will put them into a more
  62. well-behaved state first.
  63. The W8378* implements temperature sensors (three on the W83781D and W83782D,
  64. two on the W83783S), three fan rotation speed sensors, voltage sensors
  65. (seven on the W83781D, nine on the W83782D and six on the W83783S), VID
  66. lines, alarms with beep warnings, and some miscellaneous stuff.
  67. Temperatures are measured in degrees Celsius. There is always one main
  68. temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
  69. sensors. An alarm is triggered for the main sensor once when the
  70. Overtemperature Shutdown limit is crossed; it is triggered again as soon as
  71. it drops below the Hysteresis value. A more useful behavior
  72. can be found by setting the Hysteresis value to +127 degrees Celsius; in
  73. this case, alarms are issued during all the time when the actual temperature
  74. is above the Overtemperature Shutdown value. The driver sets the
  75. hysteresis value for temp1 to 127 at initialization.
  76. For the other temperature sensor(s), an alarm is triggered when the
  77. temperature gets higher then the Overtemperature Shutdown value; it stays
  78. on until the temperature falls below the Hysteresis value. But on the
  79. W83781D, there is only one alarm that functions for both other sensors!
  80. Temperatures are guaranteed within a range of -55 to +125 degrees. The
  81. main temperature sensors has a resolution of 1 degree; the other sensor(s)
  82. of 0.5 degree.
  83. Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
  84. triggered if the rotation speed has dropped below a programmable limit. Fan
  85. readings can be divided by a programmable divider (1, 2, 4 or 8 for the
  86. W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) to give
  87. the readings more range or accuracy. Not all RPM values can accurately
  88. be represented, so some rounding is done. With a divider of 2, the lowest
  89. representable value is around 2600 RPM.
  90. Voltage sensors (also known as IN sensors) report their values in volts.
  91. An alarm is triggered if the voltage has crossed a programmable minimum
  92. or maximum limit. Note that minimum in this case always means 'closest to
  93. zero'; this is important for negative voltage measurements. All voltage
  94. inputs can measure voltages between 0 and 4.08 volts, with a resolution
  95. of 0.016 volt.
  96. The VID lines encode the core voltage value: the voltage level your processor
  97. should work with. This is hardcoded by the mainboard and/or processor itself.
  98. It is a value in volts. When it is unconnected, you will often find the
  99. value 3.50 V here.
  100. The W83782D and W83783S temperature conversion machine understands about
  101. several kinds of temperature probes. You can program the so-called
  102. beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
  103. TN3904 transistor, and 3435 the default thermistor value. Other values
  104. are (not yet) supported.
  105. In addition to the alarms described above, there is a CHAS alarm on the
  106. chips which triggers if your computer case is open.
  107. When an alarm goes off, you can be warned by a beeping signal through
  108. your computer speaker. It is possible to enable all beeping globally,
  109. or only the beeping for some alarms.
  110. Individual alarm and beep bits:
  111. 0x000001: in0
  112. 0x000002: in1
  113. 0x000004: in2
  114. 0x000008: in3
  115. 0x000010: temp1
  116. 0x000020: temp2 (+temp3 on W83781D)
  117. 0x000040: fan1
  118. 0x000080: fan2
  119. 0x000100: in4
  120. 0x000200: in5
  121. 0x000400: in6
  122. 0x000800: fan3
  123. 0x001000: chassis
  124. 0x002000: temp3 (W83782D and W83627HF only)
  125. 0x010000: in7 (W83782D and W83627HF only)
  126. 0x020000: in8 (W83782D and W83627HF only)
  127. If an alarm triggers, it will remain triggered until the hardware register
  128. is read at least once. This means that the cause for the alarm may
  129. already have disappeared! Note that in the current implementation, all
  130. hardware registers are read whenever any data is read (unless it is less
  131. than 1.5 seconds since the last update). This means that you can easily
  132. 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.
  135. AS99127F PROBLEMS
  136. -----------------
  137. The as99127f support was developed without the benefit of a datasheet.
  138. In most cases it is treated as a w83781d (although revision 2 of the
  139. AS99127F looks more like a w83782d).
  140. This support will be BETA until a datasheet is released.
  141. One user has reported problems with fans stopping
  142. occasionally.
  143. Note that the individual beep bits are inverted from the other chips.
  144. The driver now takes care of this so that user-space applications
  145. don't have to know about it.
  146. Known problems:
  147. - Problems with diode/thermistor settings (supported?)
  148. - One user reports fans stopping under high server load.
  149. - Revision 2 seems to have 2 PWM registers but we don't know
  150. how to handle them. More details below.
  151. These will not be fixed unless we get a datasheet.
  152. If you have problems, please lobby Asus to release a datasheet.
  153. Unfortunately several others have without success.
  154. Please do not send mail to us asking for better as99127f support.
  155. We have done the best we can without a datasheet.
  156. Please do not send mail to the author or the sensors group asking for
  157. a datasheet or ideas on how to convince Asus. We can't help.
  158. NOTES:
  159. -----
  160. 783s has no in1 so that in[2-6] are compatible with the 781d/782d.
  161. 783s pin is programmable for -5V or temp1; defaults to -5V,
  162. no control in driver so temp1 doesn't work.
  163. 782d and 783s datasheets differ on which is pwm1 and which is pwm2.
  164. We chose to follow 782d.
  165. 782d and 783s pin is programmable for fan3 input or pwm2 output;
  166. defaults to fan3 input.
  167. If pwm2 is enabled (with echo 255 1 > pwm2), then
  168. fan3 will report 0.
  169. 782d has pwm1-2 for ISA, pwm1-4 for i2c. (pwm3-4 share pins with
  170. the ISA pins)
  171. Data sheet updates:
  172. ------------------
  173. - PWM clock registers:
  174. 000: master / 512
  175. 001: master / 1024
  176. 010: master / 2048
  177. 011: master / 4096
  178. 100: master / 8192
  179. Answers from Winbond tech support
  180. ---------------------------------
  181. >
  182. > 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
  183. > reprogramming the R-T table if the Beta of the thermistor is not
  184. > 3435K. The R-T table is described briefly in section 8.20.
  185. > What formulas do I use to program a new R-T table for a given Beta?
  186. >
  187. We are sorry that the calculation for R-T table value is
  188. confidential. If you have another Beta value of thermistor, we can help
  189. to calculate the R-T table for you. But you should give us real R-T
  190. Table which can be gotten by thermistor vendor. Therefore we will calculate
  191. them and obtain 32-byte data, and you can fill the 32-byte data to the
  192. register in Bank0.CR51 of W83781D.
  193. > 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are
  194. > programmable to be either thermistor or Pentium II diode inputs.
  195. > How do I program them for diode inputs? I can't find any register
  196. > to program these to be diode inputs.
  197. --> You may program Bank0 CR[5Dh] and CR[59h] registers.
  198. CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
  199. thermistor 0 0 0
  200. diode 1 1 1
  201. (error) CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
  202. (right) CR[59h] bit 4(VTIN1) bit 5(VTIN2) bit 6(VTIN3)
  203. PII thermal diode 1 1 1
  204. 2N3904 diode 0 0 0
  205. Asus Clones
  206. -----------
  207. We have no datasheets for the Asus clones (AS99127F and ASB100 Bach).
  208. Here are some very useful information that were given to us by Alex Van
  209. Kaam about how to detect these chips, and how to read their values. He
  210. also gives advice for another Asus chipset, the Mozart-2 (which we
  211. don't support yet). Thanks Alex!
  212. I reworded some parts and added personal comments.
  213. # Detection:
  214. AS99127F rev.1, AS99127F rev.2 and ASB100:
  215. - I2C address range: 0x29 - 0x2F
  216. - If register 0x58 holds 0x31 then we have an Asus (either ASB100 or
  217. AS99127F)
  218. - Which one depends on register 0x4F (manufacturer ID):
  219. 0x06 or 0x94: ASB100
  220. 0x12 or 0xC3: AS99127F rev.1
  221. 0x5C or 0xA3: AS99127F rev.2
  222. Note that 0x5CA3 is Winbond's ID (WEC), which let us think Asus get their
  223. AS99127F rev.2 direct from Winbond. The other codes mean ATT and DVC,
  224. respectively. ATT could stand for Asustek something (although it would be
  225. very badly chosen IMHO), I don't know what DVC could stand for. Maybe
  226. these codes simply aren't meant to be decoded that way.
  227. Mozart-2:
  228. - I2C address: 0x77
  229. - If register 0x58 holds 0x56 or 0x10 then we have a Mozart-2
  230. - Of the Mozart there are 3 types:
  231. 0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM58 Mozart-2
  232. 0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K129R Mozart-2
  233. 0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ??? Mozart-2
  234. You can handle all 3 the exact same way :)
  235. # Temperature sensors:
  236. ASB100:
  237. - sensor 1: register 0x27
  238. - sensor 2 & 3 are the 2 LM75's on the SMBus
  239. - sensor 4: register 0x17
  240. Remark: I noticed that on Intel boards sensor 2 is used for the CPU
  241. and 4 is ignored/stuck, on AMD boards sensor 4 is the CPU and sensor 2 is
  242. either ignored or a socket temperature.
  243. AS99127F (rev.1 and 2 alike):
  244. - sensor 1: register 0x27
  245. - sensor 2 & 3 are the 2 LM75's on the SMBus
  246. Remark: Register 0x5b is suspected to be temperature type selector. Bit 1
  247. would control temp1, bit 3 temp2 and bit 5 temp3.
  248. Mozart-2:
  249. - sensor 1: register 0x27
  250. - sensor 2: register 0x13
  251. # Fan sensors:
  252. ASB100, AS99127F (rev.1 and 2 alike):
  253. - 3 fans, identical to the W83781D
  254. Mozart-2:
  255. - 2 fans only, 1350000/RPM/div
  256. - fan 1: register 0x28, divisor on register 0xA1 (bits 4-5)
  257. - fan 2: register 0x29, divisor on register 0xA1 (bits 6-7)
  258. # Voltages:
  259. This is where there is a difference between AS99127F rev.1 and 2.
  260. Remark: The difference is similar to the difference between
  261. W83781D and W83782D.
  262. ASB100:
  263. in0=r(0x20)*0.016
  264. in1=r(0x21)*0.016
  265. in2=r(0x22)*0.016
  266. in3=r(0x23)*0.016*1.68
  267. in4=r(0x24)*0.016*3.8
  268. in5=r(0x25)*(-0.016)*3.97
  269. in6=r(0x26)*(-0.016)*1.666
  270. AS99127F rev.1:
  271. in0=r(0x20)*0.016
  272. in1=r(0x21)*0.016
  273. in2=r(0x22)*0.016
  274. in3=r(0x23)*0.016*1.68
  275. in4=r(0x24)*0.016*3.8
  276. in5=r(0x25)*(-0.016)*3.97
  277. in6=r(0x26)*(-0.016)*1.503
  278. AS99127F rev.2:
  279. in0=r(0x20)*0.016
  280. in1=r(0x21)*0.016
  281. in2=r(0x22)*0.016
  282. in3=r(0x23)*0.016*1.68
  283. in4=r(0x24)*0.016*3.8
  284. in5=(r(0x25)*0.016-3.6)*5.14+3.6
  285. in6=(r(0x26)*0.016-3.6)*3.14+3.6
  286. Mozart-2:
  287. in0=r(0x20)*0.016
  288. in1=255
  289. in2=r(0x22)*0.016
  290. in3=r(0x23)*0.016*1.68
  291. in4=r(0x24)*0.016*4
  292. in5=255
  293. in6=255
  294. # PWM
  295. Additional info about PWM on the AS99127F (may apply to other Asus
  296. chips as well) by Jean Delvare as of 2004-04-09:
  297. AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A,
  298. and a temperature sensor type selector at 0x5B (which basically means
  299. that they swapped registers 0x59 and 0x5B when you compare with Winbond
  300. chips).
  301. Revision 1 of the chip also has the temperature sensor type selector at
  302. 0x5B, but PWM registers have no effect.
  303. We don't know exactly how the temperature sensor type selection works.
  304. Looks like bits 1-0 are for temp1, bits 3-2 for temp2 and bits 5-4 for
  305. temp3, although it is possible that only the most significant bit matters
  306. each time. So far, values other than 0 always broke the readings.
  307. PWM registers seem to be split in two parts: bit 7 is a mode selector,
  308. while the other bits seem to define a value or threshold.
  309. When bit 7 is clear, bits 6-0 seem to hold a threshold value. If the value
  310. is below a given limit, the fan runs at low speed. If the value is above
  311. the limit, the fan runs at full speed. We have no clue as to what the limit
  312. represents. Note that there seem to be some inertia in this mode, speed
  313. changes may need some time to trigger. Also, an hysteresis mechanism is
  314. suspected since walking through all the values increasingly and then
  315. decreasingly led to slightly different limits.
  316. When bit 7 is set, bits 3-0 seem to hold a threshold value, while bits 6-4
  317. would not be significant. If the value is below a given limit, the fan runs
  318. at full speed, while if it is above the limit it runs at low speed (so this
  319. is the contrary of the other mode, in a way). Here again, we don't know
  320. what the limit is supposed to represent.
  321. One remarkable thing is that the fans would only have two or three
  322. different speeds (transitional states left apart), not a whole range as
  323. you usually get with PWM.
  324. As a conclusion, you can write 0x00 or 0x8F to the PWM registers to make
  325. fans run at low speed, and 0x7F or 0x80 to make them run at full speed.
  326. Please contact us if you can figure out how it is supposed to work. As
  327. long as we don't know more, the w83781d driver doesn't handle PWM on
  328. AS99127F chips at all.
  329. Additional info about PWM on the AS99127F rev.1 by Hector Martin:
  330. I've been fiddling around with the (in)famous 0x59 register and
  331. found out the following values do work as a form of coarse pwm:
  332. 0x80 - seems to turn fans off after some time(1-2 minutes)... might be
  333. some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an
  334. old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attemp at Qfan
  335. that was dropped at the BIOS)
  336. 0x81 - off
  337. 0x82 - slightly "on-ner" than off, but my fans do not get to move. I can
  338. hear the high-pitched PWM sound that motors give off at too-low-pwm.
  339. 0x83 - now they do move. Estimate about 70% speed or so.
  340. 0x84-0x8f - full on
  341. Changing the high nibble doesn't seem to do much except the high bit
  342. (0x80) must be set for PWM to work, else the current pwm doesn't seem to
  343. change.
  344. My mobo is an ASUS A7V266-E. This behavior is similar to what I got
  345. with speedfan under Windows, where 0-15% would be off, 15-2x% (can't
  346. remember the exact value) would be 70% and higher would be full on.