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Commit | Line | Data |
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563daaf4 RM |
1 | Kernel driver w83627ehf |
2 | ======================= | |
3 | ||
4 | Supported chips: | |
b04f2f7d | 5 | |
237c8d2f | 6 | * Winbond W83627EHF/EHG (ISA access ONLY) |
b04f2f7d | 7 | |
563daaf4 | 8 | Prefix: 'w83627ehf' |
b04f2f7d | 9 | |
563daaf4 | 10 | Addresses scanned: ISA address retrieved from Super I/O registers |
b04f2f7d | 11 | |
96d1eac9 | 12 | Datasheet: not available |
b04f2f7d | 13 | |
237c8d2f | 14 | * Winbond W83627DHG |
b04f2f7d | 15 | |
237c8d2f | 16 | Prefix: 'w83627dhg' |
b04f2f7d | 17 | |
237c8d2f | 18 | Addresses scanned: ISA address retrieved from Super I/O registers |
b04f2f7d | 19 | |
96d1eac9 | 20 | Datasheet: not available |
b04f2f7d | 21 | |
c1e48dce | 22 | * Winbond W83627DHG-P |
b04f2f7d | 23 | |
c1e48dce | 24 | Prefix: 'w83627dhg' |
b04f2f7d | 25 | |
c1e48dce | 26 | Addresses scanned: ISA address retrieved from Super I/O registers |
b04f2f7d | 27 | |
c1e48dce | 28 | Datasheet: not available |
b04f2f7d | 29 | |
eff7687d | 30 | * Winbond W83627UHG |
b04f2f7d | 31 | |
eff7687d | 32 | Prefix: 'w83627uhg' |
b04f2f7d | 33 | |
eff7687d | 34 | Addresses scanned: ISA address retrieved from Super I/O registers |
b04f2f7d | 35 | |
eff7687d | 36 | Datasheet: available from www.nuvoton.com |
b04f2f7d | 37 | |
237c8d2f | 38 | * Winbond W83667HG |
b04f2f7d | 39 | |
237c8d2f | 40 | Prefix: 'w83667hg' |
b04f2f7d | 41 | |
237c8d2f | 42 | Addresses scanned: ISA address retrieved from Super I/O registers |
b04f2f7d | 43 | |
237c8d2f | 44 | Datasheet: not available |
b04f2f7d | 45 | |
c39aedaf | 46 | * Winbond W83667HG-B |
b04f2f7d | 47 | |
c39aedaf | 48 | Prefix: 'w83667hg' |
b04f2f7d | 49 | |
c39aedaf | 50 | Addresses scanned: ISA address retrieved from Super I/O registers |
b04f2f7d | 51 | |
c39aedaf | 52 | Datasheet: Available from Nuvoton upon request |
b04f2f7d | 53 | |
ec3e5a16 | 54 | * Nuvoton NCT6775F/W83667HG-I |
b04f2f7d | 55 | |
ec3e5a16 | 56 | Prefix: 'nct6775' |
b04f2f7d | 57 | |
ec3e5a16 | 58 | Addresses scanned: ISA address retrieved from Super I/O registers |
b04f2f7d | 59 | |
ec3e5a16 | 60 | Datasheet: Available from Nuvoton upon request |
b04f2f7d | 61 | |
ec3e5a16 | 62 | * Nuvoton NCT6776F |
b04f2f7d | 63 | |
ec3e5a16 | 64 | Prefix: 'nct6776' |
b04f2f7d | 65 | |
ec3e5a16 | 66 | Addresses scanned: ISA address retrieved from Super I/O registers |
b04f2f7d | 67 | |
ec3e5a16 | 68 | Datasheet: Available from Nuvoton upon request |
563daaf4 | 69 | |
b04f2f7d | 70 | |
563daaf4 | 71 | Authors: |
b04f2f7d MCC |
72 | |
73 | - Jean Delvare <jdelvare@suse.de> | |
74 | - Yuan Mu (Winbond) | |
75 | - Rudolf Marek <r.marek@assembler.cz> | |
76 | - David Hubbard <david.c.hubbard@gmail.com> | |
77 | - Gong Jun <JGong@nuvoton.com> | |
563daaf4 RM |
78 | |
79 | Description | |
80 | ----------- | |
81 | ||
237c8d2f | 82 | This driver implements support for the Winbond W83627EHF, W83627EHG, |
eff7687d JD |
83 | W83627DHG, W83627DHG-P, W83627UHG, W83667HG, W83667HG-B, W83667HG-I |
84 | (NCT6775F), and NCT6776F super I/O chips. We will refer to them collectively | |
85 | as Winbond chips. | |
86 | ||
aacb6b00 | 87 | The chips implement 3 to 4 temperature sensors (9 for NCT6775F and NCT6776F), |
eff7687d JD |
88 | 2 to 5 fan rotation speed sensors, 8 to 10 analog voltage sensors, one VID |
89 | (except for 627UHG), alarms with beep warnings (control unimplemented), | |
ec3e5a16 GR |
90 | and some automatic fan regulation strategies (plus manual fan control mode). |
91 | ||
92 | The temperature sensor sources on W82677HG-B, NCT6775F, and NCT6776F are | |
93 | configurable. temp4 and higher attributes are only reported if its temperature | |
94 | source differs from the temperature sources of the already reported temperature | |
95 | sensors. The configured source for each of the temperature sensors is provided | |
96 | in tempX_label. | |
d36cf32c | 97 | |
563daaf4 | 98 | Temperatures are measured in degrees Celsius and measurement resolution is 1 |
f8c963e5 | 99 | degC for temp1 and 0.5 degC for temp2 and temp3. For temp4 and higher, |
ec3e5a16 GR |
100 | resolution is 1 degC for W83667HG-B and 0.0 degC for NCT6775F and NCT6776F. |
101 | An alarm is triggered when the temperature gets higher than high limit; | |
102 | it stays on until the temperature falls below the hysteresis value. | |
103 | Alarms are only supported for temp1, temp2, and temp3. | |
563daaf4 RM |
104 | |
105 | Fan rotation speeds are reported in RPM (rotations per minute). An alarm is | |
106 | triggered if the rotation speed has dropped below a programmable limit. Fan | |
107 | readings can be divided by a programmable divider (1, 2, 4, 8, 16, 32, 64 or | |
108 | 128) to give the readings more range or accuracy. The driver sets the most | |
109 | suitable fan divisor itself. Some fans might not be present because they | |
110 | share pins with other functions. | |
111 | ||
112 | Voltage sensors (also known as IN sensors) report their values in millivolts. | |
113 | An alarm is triggered if the voltage has crossed a programmable minimum | |
114 | or maximum limit. | |
115 | ||
116 | The driver supports automatic fan control mode known as Thermal Cruise. | |
117 | In this mode, the chip attempts to keep the measured temperature in a | |
118 | predefined temperature range. If the temperature goes out of range, fan | |
119 | is driven slower/faster to reach the predefined range again. | |
120 | ||
121 | The mode works for fan1-fan4. Mapping of temperatures to pwm outputs is as | |
b04f2f7d | 122 | follows:: |
563daaf4 | 123 | |
b04f2f7d MCC |
124 | temp1 -> pwm1 |
125 | temp2 -> pwm2 | |
126 | temp3 -> pwm3 (not on 627UHG) | |
127 | prog -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not | |
128 | supported by the driver) | |
563daaf4 RM |
129 | |
130 | /sys files | |
131 | ---------- | |
132 | ||
b04f2f7d MCC |
133 | name |
134 | this is a standard hwmon device entry, it contains the name of | |
135 | the device (see the prefix in the list of supported devices at | |
136 | the top of this file) | |
137 | ||
138 | pwm[1-4] | |
139 | this file stores PWM duty cycle or DC value (fan speed) in range: | |
657c93b1 | 140 | |
563daaf4 RM |
141 | 0 (stop) to 255 (full) |
142 | ||
b04f2f7d MCC |
143 | pwm[1-4]_enable |
144 | this file controls mode of fan/temperature control: | |
145 | ||
41e9a062 DB |
146 | * 1 Manual mode, write to pwm file any value 0-255 (full speed) |
147 | * 2 "Thermal Cruise" mode | |
148 | * 3 "Fan Speed Cruise" mode | |
149 | * 4 "Smart Fan III" mode | |
ec3e5a16 GR |
150 | * 5 "Smart Fan IV" mode |
151 | ||
152 | SmartFan III mode is not supported on NCT6776F. | |
153 | ||
154 | SmartFan IV mode is configurable only if it was configured at system | |
155 | startup, and is only supported for W83677HG-B, NCT6775F, and NCT6776F. | |
156 | SmartFan IV operational parameters can not be configured at this time, | |
157 | and the various pwm attributes are not used in SmartFan IV mode. | |
158 | The attributes can be written to, which is useful if you plan to | |
159 | configure the system for a different pwm mode. However, the information | |
160 | returned when reading pwm attributes is unrelated to SmartFan IV | |
161 | operation. | |
41e9a062 | 162 | |
b04f2f7d MCC |
163 | pwm[1-4]_mode |
164 | controls if output is PWM or DC level | |
165 | ||
166 | * 0 DC output (0 - 12v) | |
167 | * 1 PWM output | |
563daaf4 RM |
168 | |
169 | Thermal Cruise mode | |
170 | ------------------- | |
171 | ||
172 | If the temperature is in the range defined by: | |
173 | ||
b04f2f7d MCC |
174 | pwm[1-4]_target |
175 | set target temperature, unit millidegree Celsius | |
176 | (range 0 - 127000) | |
177 | pwm[1-4]_tolerance | |
178 | tolerance, unit millidegree Celsius (range 0 - 15000) | |
563daaf4 RM |
179 | |
180 | there are no changes to fan speed. Once the temperature leaves the interval, | |
181 | fan speed increases (temp is higher) or decreases if lower than desired. | |
182 | There are defined steps and times, but not exported by the driver yet. | |
183 | ||
b04f2f7d MCC |
184 | pwm[1-4]_min_output |
185 | minimum fan speed (range 1 - 255), when the temperature | |
186 | is below defined range. | |
187 | pwm[1-4]_stop_time | |
188 | how many milliseconds [ms] must elapse to switch | |
189 | corresponding fan off. (when the temperature was below | |
190 | defined range). | |
191 | pwm[1-4]_start_output | |
192 | minimum fan speed (range 1 - 255) when spinning up | |
193 | pwm[1-4]_step_output | |
194 | rate of fan speed change (1 - 255) | |
195 | pwm[1-4]_stop_output | |
196 | minimum fan speed (range 1 - 255) when spinning down | |
197 | pwm[1-4]_max_output | |
198 | maximum fan speed (range 1 - 255), when the temperature | |
199 | is above defined range. | |
563daaf4 | 200 | |
c43524b5 | 201 | Note: last six functions are influenced by other control bits, not yet exported |
563daaf4 | 202 | by the driver, so a change might not have any effect. |
657c93b1 DH |
203 | |
204 | Implementation Details | |
205 | ---------------------- | |
206 | ||
207 | Future driver development should bear in mind that the following registers have | |
208 | different functions on the 627EHF and the 627DHG. Some registers also have | |
209 | different power-on default values, but BIOS should already be loading | |
210 | appropriate defaults. Note that bank selection must be performed as is currently | |
211 | done in the driver for all register addresses. | |
212 | ||
b04f2f7d MCC |
213 | ========================= ===================================================== |
214 | Register(s) Meaning | |
215 | ========================= ===================================================== | |
216 | 0x49 only on DHG, selects temperature source for AUX fan, | |
217 | CPU fan0 | |
218 | 0x4a not completely documented for the EHF and the DHG | |
219 | documentation assigns different behavior to bits 7 | |
220 | and 6, including extending the temperature input | |
221 | selection to SmartFan I, not just SmartFan III. | |
222 | Testing on the EHF will reveal whether they are | |
223 | compatible or not. | |
224 | 0x58 Chip ID: 0xa1=EHF 0xc1=DHG | |
225 | 0x5e only on DHG, has bits to enable "current mode" | |
226 | temperature detection and critical temperature | |
227 | protection | |
228 | 0x45b only on EHF, bit 3, vin4 alarm (EHF supports 10 | |
229 | inputs, only 9 on DHG) | |
230 | 0x552 only on EHF, vin4 | |
231 | 0x558 only on EHF, vin4 high limit | |
232 | 0x559 only on EHF, vin4 low limit | |
233 | 0x6b only on DHG, SYS fan critical temperature | |
234 | 0x6c only on DHG, CPU fan0 critical temperature | |
235 | 0x6d only on DHG, AUX fan critical temperature | |
236 | 0x6e only on DHG, CPU fan1 critical temperature | |
237 | 0x50-0x55 and 0x650-0x657 marked as: | |
238 | ||
239 | - "Test Register" for the EHF | |
240 | - "Reserved Register" for the DHG | |
241 | ========================= ===================================================== | |
657c93b1 DH |
242 | |
243 | The DHG also supports PECI, where the DHG queries Intel CPU temperatures, and | |
244 | the ICH8 southbridge gets that data via PECI from the DHG, so that the | |
245 | southbridge drives the fans. And the DHG supports SST, a one-wire serial bus. | |
c1e48dce JD |
246 | |
247 | The DHG-P has an additional automatic fan speed control mode named Smart Fan | |
248 | (TM) III+. This mode is not yet supported by the driver. |