dme1737 12 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329
  1. Kernel driver dme1737
  2. =====================
  3. Supported chips:
  4. * SMSC DME1737 and compatibles (like Asus A8000)
  5. Prefix: 'dme1737'
  6. Addresses scanned: I2C 0x2c, 0x2d, 0x2e
  7. Datasheet: Provided by SMSC upon request and under NDA
  8. * SMSC SCH3112, SCH3114, SCH3116
  9. Prefix: 'sch311x'
  10. Addresses scanned: none, address read from Super-I/O config space
  11. Datasheet: Available on the Internet
  12. * SMSC SCH5027
  13. Prefix: 'sch5027'
  14. Addresses scanned: I2C 0x2c, 0x2d, 0x2e
  15. Datasheet: Provided by SMSC upon request and under NDA
  16. * SMSC SCH5127
  17. Prefix: 'sch5127'
  18. Addresses scanned: none, address read from Super-I/O config space
  19. Datasheet: Provided by SMSC upon request and under NDA
  20. Authors:
  21. Juerg Haefliger <juergh@gmail.com>
  22. Module Parameters
  23. -----------------
  24. * force_start: bool Enables the monitoring of voltage, fan and temp inputs
  25. and PWM output control functions. Using this parameter
  26. shouldn't be required since the BIOS usually takes care
  27. of this.
  28. * probe_all_addr: bool Include non-standard LPC addresses 0x162e and 0x164e
  29. when probing for ISA devices. This is required for the
  30. following boards:
  31. - VIA EPIA SN18000
  32. Description
  33. -----------
  34. This driver implements support for the hardware monitoring capabilities of the
  35. SMSC DME1737 and Asus A8000 (which are the same), SMSC SCH5027, SCH311x,
  36. and SCH5127 Super-I/O chips. These chips feature monitoring of 3 temp sensors
  37. temp[1-3] (2 remote diodes and 1 internal), 8 voltages in[0-7] (7 external and
  38. 1 internal) and up to 6 fan speeds fan[1-6]. Additionally, the chips implement
  39. up to 5 PWM outputs pwm[1-3,5-6] for controlling fan speeds both manually and
  40. automatically.
  41. For the DME1737, A8000 and SCH5027, fan[1-2] and pwm[1-2] are always present.
  42. Fan[3-6] and pwm[3,5-6] are optional features and their availability depends on
  43. the configuration of the chip. The driver will detect which features are
  44. present during initialization and create the sysfs attributes accordingly.
  45. For the SCH311x and SCH5127, fan[1-3] and pwm[1-3] are always present and
  46. fan[4-6] and pwm[5-6] don't exist.
  47. The hardware monitoring features of the DME1737, A8000, and SCH5027 are only
  48. accessible via SMBus, while the SCH311x and SCH5127 only provide access via
  49. the ISA bus. The driver will therefore register itself as an I2C client driver
  50. if it detects a DME1737, A8000, or SCH5027 and as a platform driver if it
  51. detects a SCH311x or SCH5127 chip.
  52. Voltage Monitoring
  53. ------------------
  54. The voltage inputs are sampled with 12-bit resolution and have internal
  55. scaling resistors. The values returned by the driver therefore reflect true
  56. millivolts and don't need scaling. The voltage inputs are mapped as follows
  57. (the last column indicates the input ranges):
  58. DME1737, A8000:
  59. in0: +5VTR (+5V standby) 0V - 6.64V
  60. in1: Vccp (processor core) 0V - 3V
  61. in2: VCC (internal +3.3V) 0V - 4.38V
  62. in3: +5V 0V - 6.64V
  63. in4: +12V 0V - 16V
  64. in5: VTR (+3.3V standby) 0V - 4.38V
  65. in6: Vbat (+3.0V) 0V - 4.38V
  66. SCH311x:
  67. in0: +2.5V 0V - 3.32V
  68. in1: Vccp (processor core) 0V - 2V
  69. in2: VCC (internal +3.3V) 0V - 4.38V
  70. in3: +5V 0V - 6.64V
  71. in4: +12V 0V - 16V
  72. in5: VTR (+3.3V standby) 0V - 4.38V
  73. in6: Vbat (+3.0V) 0V - 4.38V
  74. SCH5027:
  75. in0: +5VTR (+5V standby) 0V - 6.64V
  76. in1: Vccp (processor core) 0V - 3V
  77. in2: VCC (internal +3.3V) 0V - 4.38V
  78. in3: V2_IN 0V - 1.5V
  79. in4: V1_IN 0V - 1.5V
  80. in5: VTR (+3.3V standby) 0V - 4.38V
  81. in6: Vbat (+3.0V) 0V - 4.38V
  82. SCH5127:
  83. in0: +2.5 0V - 3.32V
  84. in1: Vccp (processor core) 0V - 3V
  85. in2: VCC (internal +3.3V) 0V - 4.38V
  86. in3: V2_IN 0V - 1.5V
  87. in4: V1_IN 0V - 1.5V
  88. in5: VTR (+3.3V standby) 0V - 4.38V
  89. in6: Vbat (+3.0V) 0V - 4.38V
  90. in7: Vtrip (+1.5V) 0V - 1.99V
  91. Each voltage input has associated min and max limits which trigger an alarm
  92. when crossed.
  93. Temperature Monitoring
  94. ----------------------
  95. Temperatures are measured with 12-bit resolution and reported in millidegree
  96. Celsius. The chip also features offsets for all 3 temperature inputs which -
  97. when programmed - get added to the input readings. The chip does all the
  98. scaling by itself and the driver therefore reports true temperatures that don't
  99. need any user-space adjustments. The temperature inputs are mapped as follows
  100. (the last column indicates the input ranges):
  101. temp1: Remote diode 1 (3904 type) temperature -127C - +127C
  102. temp2: DME1737 internal temperature -127C - +127C
  103. temp3: Remote diode 2 (3904 type) temperature -127C - +127C
  104. Each temperature input has associated min and max limits which trigger an alarm
  105. when crossed. Additionally, each temperature input has a fault attribute that
  106. returns 1 when a faulty diode or an unconnected input is detected and 0
  107. otherwise.
  108. Fan Monitoring
  109. --------------
  110. Fan RPMs are measured with 16-bit resolution. The chip provides inputs for 6
  111. fan tachometers. All 6 inputs have an associated min limit which triggers an
  112. alarm when crossed. Fan inputs 1-4 provide type attributes that need to be set
  113. to the number of pulses per fan revolution that the connected tachometer
  114. generates. Supported values are 1, 2, and 4. Fan inputs 5-6 only support fans
  115. that generate 2 pulses per revolution. Fan inputs 5-6 also provide a max
  116. attribute that needs to be set to the maximum attainable RPM (fan at 100% duty-
  117. cycle) of the input. The chip adjusts the sampling rate based on this value.
  118. PWM Output Control
  119. ------------------
  120. This chip features 5 PWM outputs. PWM outputs 1-3 are associated with fan
  121. inputs 1-3 and PWM outputs 5-6 are associated with fan inputs 5-6. PWM outputs
  122. 1-3 can be configured to operate either in manual or automatic mode by setting
  123. the appropriate enable attribute accordingly. PWM outputs 5-6 can only operate
  124. in manual mode, their enable attributes are therefore read-only. When set to
  125. manual mode, the fan speed is set by writing the duty-cycle value to the
  126. appropriate PWM attribute. In automatic mode, the PWM attribute returns the
  127. current duty-cycle as set by the fan controller in the chip. All PWM outputs
  128. support the setting of the output frequency via the freq attribute.
  129. In automatic mode, the chip supports the setting of the PWM ramp rate which
  130. defines how fast the PWM output is adjusting to changes of the associated
  131. temperature input. Associating PWM outputs to temperature inputs is done via
  132. temperature zones. The chip features 3 zones whose assignments to temperature
  133. inputs is static and determined during initialization. These assignments can
  134. be retrieved via the zone[1-3]_auto_channels_temp attributes. Each PWM output
  135. is assigned to one (or hottest of multiple) temperature zone(s) through the
  136. pwm[1-3]_auto_channels_zone attributes. Each PWM output has 3 distinct output
  137. duty-cycles: full, low, and min. Full is internally hard-wired to 255 (100%)
  138. and low and min can be programmed via pwm[1-3]_auto_point1_pwm and
  139. pwm[1-3]_auto_pwm_min, respectively. The thermal thresholds of the zones are
  140. programmed via zone[1-3]_auto_point[1-3]_temp and
  141. zone[1-3]_auto_point1_temp_hyst:
  142. pwm[1-3]_auto_point2_pwm full-speed duty-cycle (255, i.e., 100%)
  143. pwm[1-3]_auto_point1_pwm low-speed duty-cycle
  144. pwm[1-3]_auto_pwm_min min-speed duty-cycle
  145. zone[1-3]_auto_point3_temp full-speed temp (all outputs)
  146. zone[1-3]_auto_point2_temp full-speed temp
  147. zone[1-3]_auto_point1_temp low-speed temp
  148. zone[1-3]_auto_point1_temp_hyst min-speed temp
  149. The chip adjusts the output duty-cycle linearly in the range of auto_point1_pwm
  150. to auto_point2_pwm if the temperature of the associated zone is between
  151. auto_point1_temp and auto_point2_temp. If the temperature drops below the
  152. auto_point1_temp_hyst value, the output duty-cycle is set to the auto_pwm_min
  153. value which only supports two values: 0 or auto_point1_pwm. That means that the
  154. fan either turns completely off or keeps spinning with the low-speed
  155. duty-cycle. If any of the temperatures rise above the auto_point3_temp value,
  156. all PWM outputs are set to 100% duty-cycle.
  157. Following is another representation of how the chip sets the output duty-cycle
  158. based on the temperature of the associated thermal zone:
  159. Duty-Cycle Duty-Cycle
  160. Temperature Rising Temp Falling Temp
  161. ----------- ----------- ------------
  162. full-speed full-speed full-speed
  163. < linearly adjusted duty-cycle >
  164. low-speed low-speed low-speed
  165. min-speed low-speed
  166. min-speed min-speed min-speed
  167. min-speed min-speed
  168. Sysfs Attributes
  169. ----------------
  170. Following is a list of all sysfs attributes that the driver provides, their
  171. permissions and a short description:
  172. Name Perm Description
  173. ---- ---- -----------
  174. cpu0_vid RO CPU core reference voltage in
  175. millivolts.
  176. vrm RW Voltage regulator module version
  177. number.
  178. in[0-7]_input RO Measured voltage in millivolts.
  179. in[0-7]_min RW Low limit for voltage input.
  180. in[0-7]_max RW High limit for voltage input.
  181. in[0-7]_alarm RO Voltage input alarm. Returns 1 if
  182. voltage input is or went outside the
  183. associated min-max range, 0 otherwise.
  184. temp[1-3]_input RO Measured temperature in millidegree
  185. Celsius.
  186. temp[1-3]_min RW Low limit for temp input.
  187. temp[1-3]_max RW High limit for temp input.
  188. temp[1-3]_offset RW Offset for temp input. This value will
  189. be added by the chip to the measured
  190. temperature.
  191. temp[1-3]_alarm RO Alarm for temp input. Returns 1 if temp
  192. input is or went outside the associated
  193. min-max range, 0 otherwise.
  194. temp[1-3]_fault RO Temp input fault. Returns 1 if the chip
  195. detects a faulty thermal diode or an
  196. unconnected temp input, 0 otherwise.
  197. zone[1-3]_auto_channels_temp RO Temperature zone to temperature input
  198. mapping. This attribute is a bitfield
  199. and supports the following values:
  200. 1: temp1
  201. 2: temp2
  202. 4: temp3
  203. zone[1-3]_auto_point1_temp_hyst RW Auto PWM temp point1 hysteresis. The
  204. output of the corresponding PWM is set
  205. to the pwm_auto_min value if the temp
  206. falls below the auto_point1_temp_hyst
  207. value.
  208. zone[1-3]_auto_point[1-3]_temp RW Auto PWM temp points. Auto_point1 is
  209. the low-speed temp, auto_point2 is the
  210. full-speed temp, and auto_point3 is the
  211. temp at which all PWM outputs are set
  212. to full-speed (100% duty-cycle).
  213. fan[1-6]_input RO Measured fan speed in RPM.
  214. fan[1-6]_min RW Low limit for fan input.
  215. fan[1-6]_alarm RO Alarm for fan input. Returns 1 if fan
  216. input is or went below the associated
  217. min value, 0 otherwise.
  218. fan[1-4]_type RW Type of attached fan. Expressed in
  219. number of pulses per revolution that
  220. the fan generates. Supported values are
  221. 1, 2, and 4.
  222. fan[5-6]_max RW Max attainable RPM at 100% duty-cycle.
  223. Required for chip to adjust the
  224. sampling rate accordingly.
  225. pmw[1-3,5-6] RO/RW Duty-cycle of PWM output. Supported
  226. values are 0-255 (0%-100%). Only
  227. writeable if the associated PWM is in
  228. manual mode.
  229. pwm[1-3]_enable RW Enable of PWM outputs 1-3. Supported
  230. values are:
  231. 0: turned off (output @ 100%)
  232. 1: manual mode
  233. 2: automatic mode
  234. pwm[5-6]_enable RO Enable of PWM outputs 5-6. Always
  235. returns 1 since these 2 outputs are
  236. hard-wired to manual mode.
  237. pmw[1-3,5-6]_freq RW Frequency of PWM output. Supported
  238. values are in the range 11Hz-30000Hz
  239. (default is 25000Hz).
  240. pmw[1-3]_ramp_rate RW Ramp rate of PWM output. Determines how
  241. fast the PWM duty-cycle will change
  242. when the PWM is in automatic mode.
  243. Expressed in ms per PWM step. Supported
  244. values are in the range 0ms-206ms
  245. (default is 0, which means the duty-
  246. cycle changes instantly).
  247. pwm[1-3]_auto_channels_zone RW PWM output to temperature zone mapping.
  248. This attribute is a bitfield and
  249. supports the following values:
  250. 1: zone1
  251. 2: zone2
  252. 4: zone3
  253. 6: highest of zone[2-3]
  254. 7: highest of zone[1-3]
  255. pwm[1-3]_auto_pwm_min RW Auto PWM min pwm. Minimum PWM duty-
  256. cycle. Supported values are 0 or
  257. auto_point1_pwm.
  258. pwm[1-3]_auto_point1_pwm RW Auto PWM pwm point. Auto_point1 is the
  259. low-speed duty-cycle.
  260. pwm[1-3]_auto_point2_pwm RO Auto PWM pwm point. Auto_point2 is the
  261. full-speed duty-cycle which is hard-
  262. wired to 255 (100% duty-cycle).
  263. Chip Differences
  264. ----------------
  265. Feature dme1737 sch311x sch5027 sch5127
  266. -------------------------------------------------------
  267. temp[1-3]_offset yes yes
  268. vid yes
  269. zone3 yes yes yes
  270. zone[1-3]_hyst yes yes
  271. pwm min/off yes yes
  272. fan3 opt yes opt yes
  273. pwm3 opt yes opt yes
  274. fan4 opt opt
  275. fan5 opt opt
  276. pwm5 opt opt
  277. fan6 opt opt
  278. pwm6 opt opt
  279. in7 yes