365 lines
13 KiB
ReStructuredText
365 lines
13 KiB
ReStructuredText
|
Kernel driver dme1737
|
||
|
|
=====================
|
||
|
|
|
||
|
|
Supported chips:
|
||
|
|
|
||
|
|
* SMSC DME1737 and compatibles (like Asus A8000)
|
||
|
|
|
||
|
|
Prefix: 'dme1737'
|
||
|
|
|
||
|
|
Addresses scanned: I2C 0x2c, 0x2d, 0x2e
|
||
|
|
|
||
|
|
Datasheet: Provided by SMSC upon request and under NDA
|
||
|
|
|
||
|
|
* SMSC SCH3112, SCH3114, SCH3116
|
||
|
|
|
||
|
|
Prefix: 'sch311x'
|
||
|
|
|
||
|
|
Addresses scanned: none, address read from Super-I/O config space
|
||
|
|
|
||
|
|
Datasheet: Available on the Internet
|
||
|
|
|
||
|
|
* SMSC SCH5027
|
||
|
|
|
||
|
|
Prefix: 'sch5027'
|
||
|
|
|
||
|
|
Addresses scanned: I2C 0x2c, 0x2d, 0x2e
|
||
|
|
|
||
|
|
Datasheet: Provided by SMSC upon request and under NDA
|
||
|
|
|
||
|
|
* SMSC SCH5127
|
||
|
|
|
||
|
|
Prefix: 'sch5127'
|
||
|
|
|
||
|
|
Addresses scanned: none, address read from Super-I/O config space
|
||
|
|
|
||
|
|
Datasheet: Provided by SMSC upon request and under NDA
|
||
|
|
|
||
|
|
Authors:
|
||
|
|
Juerg Haefliger <juergh@gmail.com>
|
||
|
|
|
||
|
|
|
||
|
|
Module Parameters
|
||
|
|
-----------------
|
||
|
|
|
||
|
|
* force_start: bool
|
||
|
|
Enables the monitoring of voltage, fan and temp inputs
|
||
|
|
and PWM output control functions. Using this parameter
|
||
|
|
shouldn't be required since the BIOS usually takes care
|
||
|
|
of this.
|
||
|
|
|
||
|
|
* probe_all_addr: bool
|
||
|
|
Include non-standard LPC addresses 0x162e and 0x164e
|
||
|
|
when probing for ISA devices. This is required for the
|
||
|
|
following boards:
|
||
|
|
- VIA EPIA SN18000
|
||
|
|
|
||
|
|
|
||
|
|
Description
|
||
|
|
-----------
|
||
|
|
|
||
|
|
This driver implements support for the hardware monitoring capabilities of the
|
||
|
|
SMSC DME1737 and Asus A8000 (which are the same), SMSC SCH5027, SCH311x,
|
||
|
|
and SCH5127 Super-I/O chips. These chips feature monitoring of 3 temp sensors
|
||
|
|
temp[1-3] (2 remote diodes and 1 internal), 8 voltages in[0-7] (7 external and
|
||
|
|
1 internal) and up to 6 fan speeds fan[1-6]. Additionally, the chips implement
|
||
|
|
up to 5 PWM outputs pwm[1-3,5-6] for controlling fan speeds both manually and
|
||
|
|
automatically.
|
||
|
|
|
||
|
|
For the DME1737, A8000 and SCH5027, fan[1-2] and pwm[1-2] are always present.
|
||
|
|
Fan[3-6] and pwm[3,5-6] are optional features and their availability depends on
|
||
|
|
the configuration of the chip. The driver will detect which features are
|
||
|
|
present during initialization and create the sysfs attributes accordingly.
|
||
|
|
|
||
|
|
For the SCH311x and SCH5127, fan[1-3] and pwm[1-3] are always present and
|
||
|
|
fan[4-6] and pwm[5-6] don't exist.
|
||
|
|
|
||
|
|
The hardware monitoring features of the DME1737, A8000, and SCH5027 are only
|
||
|
|
accessible via SMBus, while the SCH311x and SCH5127 only provide access via
|
||
|
|
the ISA bus. The driver will therefore register itself as an I2C client driver
|
||
|
|
if it detects a DME1737, A8000, or SCH5027 and as a platform driver if it
|
||
|
|
detects a SCH311x or SCH5127 chip.
|
||
|
|
|
||
|
|
|
||
|
|
Voltage Monitoring
|
||
|
|
------------------
|
||
|
|
|
||
|
|
The voltage inputs are sampled with 12-bit resolution and have internal
|
||
|
|
scaling resistors. The values returned by the driver therefore reflect true
|
||
|
|
millivolts and don't need scaling. The voltage inputs are mapped as follows
|
||
|
|
(the last column indicates the input ranges):
|
||
|
|
|
||
|
|
DME1737, A8000::
|
||
|
|
|
||
|
|
in0: +5VTR (+5V standby) 0V - 6.64V
|
||
|
|
in1: Vccp (processor core) 0V - 3V
|
||
|
|
in2: VCC (internal +3.3V) 0V - 4.38V
|
||
|
|
in3: +5V 0V - 6.64V
|
||
|
|
in4: +12V 0V - 16V
|
||
|
|
in5: VTR (+3.3V standby) 0V - 4.38V
|
||
|
|
in6: Vbat (+3.0V) 0V - 4.38V
|
||
|
|
|
||
|
|
SCH311x::
|
||
|
|
|
||
|
|
in0: +2.5V 0V - 3.32V
|
||
|
|
in1: Vccp (processor core) 0V - 2V
|
||
|
|
in2: VCC (internal +3.3V) 0V - 4.38V
|
||
|
|
in3: +5V 0V - 6.64V
|
||
|
|
in4: +12V 0V - 16V
|
||
|
|
in5: VTR (+3.3V standby) 0V - 4.38V
|
||
|
|
in6: Vbat (+3.0V) 0V - 4.38V
|
||
|
|
|
||
|
|
SCH5027::
|
||
|
|
|
||
|
|
in0: +5VTR (+5V standby) 0V - 6.64V
|
||
|
|
in1: Vccp (processor core) 0V - 3V
|
||
|
|
in2: VCC (internal +3.3V) 0V - 4.38V
|
||
|
|
in3: V2_IN 0V - 1.5V
|
||
|
|
in4: V1_IN 0V - 1.5V
|
||
|
|
in5: VTR (+3.3V standby) 0V - 4.38V
|
||
|
|
in6: Vbat (+3.0V) 0V - 4.38V
|
||
|
|
|
||
|
|
SCH5127::
|
||
|
|
|
||
|
|
in0: +2.5 0V - 3.32V
|
||
|
|
in1: Vccp (processor core) 0V - 3V
|
||
|
|
in2: VCC (internal +3.3V) 0V - 4.38V
|
||
|
|
in3: V2_IN 0V - 1.5V
|
||
|
|
in4: V1_IN 0V - 1.5V
|
||
|
|
in5: VTR (+3.3V standby) 0V - 4.38V
|
||
|
|
in6: Vbat (+3.0V) 0V - 4.38V
|
||
|
|
in7: Vtrip (+1.5V) 0V - 1.99V
|
||
|
|
|
||
|
|
Each voltage input has associated min and max limits which trigger an alarm
|
||
|
|
when crossed.
|
||
|
|
|
||
|
|
|
||
|
|
Temperature Monitoring
|
||
|
|
----------------------
|
||
|
|
|
||
|
|
Temperatures are measured with 12-bit resolution and reported in millidegree
|
||
|
|
Celsius. The chip also features offsets for all 3 temperature inputs which -
|
||
|
|
when programmed - get added to the input readings. The chip does all the
|
||
|
|
scaling by itself and the driver therefore reports true temperatures that don't
|
||
|
|
need any user-space adjustments. The temperature inputs are mapped as follows
|
||
|
|
(the last column indicates the input ranges)::
|
||
|
|
|
||
|
|
temp1: Remote diode 1 (3904 type) temperature -127C - +127C
|
||
|
|
temp2: DME1737 internal temperature -127C - +127C
|
||
|
|
temp3: Remote diode 2 (3904 type) temperature -127C - +127C
|
||
|
|
|
||
|
|
Each temperature input has associated min and max limits which trigger an alarm
|
||
|
|
when crossed. Additionally, each temperature input has a fault attribute that
|
||
|
|
returns 1 when a faulty diode or an unconnected input is detected and 0
|
||
|
|
otherwise.
|
||
|
|
|
||
|
|
|
||
|
|
Fan Monitoring
|
||
|
|
--------------
|
||
|
|
|
||
|
|
Fan RPMs are measured with 16-bit resolution. The chip provides inputs for 6
|
||
|
|
fan tachometers. All 6 inputs have an associated min limit which triggers an
|
||
|
|
alarm when crossed. Fan inputs 1-4 provide type attributes that need to be set
|
||
|
|
to the number of pulses per fan revolution that the connected tachometer
|
||
|
|
generates. Supported values are 1, 2, and 4. Fan inputs 5-6 only support fans
|
||
|
|
that generate 2 pulses per revolution. Fan inputs 5-6 also provide a max
|
||
|
|
attribute that needs to be set to the maximum attainable RPM (fan at 100% duty-
|
||
|
|
cycle) of the input. The chip adjusts the sampling rate based on this value.
|
||
|
|
|
||
|
|
|
||
|
|
PWM Output Control
|
||
|
|
------------------
|
||
|
|
|
||
|
|
This chip features 5 PWM outputs. PWM outputs 1-3 are associated with fan
|
||
|
|
inputs 1-3 and PWM outputs 5-6 are associated with fan inputs 5-6. PWM outputs
|
||
|
|
1-3 can be configured to operate either in manual or automatic mode by setting
|
||
|
|
the appropriate enable attribute accordingly. PWM outputs 5-6 can only operate
|
||
|
|
in manual mode, their enable attributes are therefore read-only. When set to
|
||
|
|
manual mode, the fan speed is set by writing the duty-cycle value to the
|
||
|
|
appropriate PWM attribute. In automatic mode, the PWM attribute returns the
|
||
|
|
current duty-cycle as set by the fan controller in the chip. All PWM outputs
|
||
|
|
support the setting of the output frequency via the freq attribute.
|
||
|
|
|
||
|
|
In automatic mode, the chip supports the setting of the PWM ramp rate which
|
||
|
|
defines how fast the PWM output is adjusting to changes of the associated
|
||
|
|
temperature input. Associating PWM outputs to temperature inputs is done via
|
||
|
|
temperature zones. The chip features 3 zones whose assignments to temperature
|
||
|
|
inputs is static and determined during initialization. These assignments can
|
||
|
|
be retrieved via the zone[1-3]_auto_channels_temp attributes. Each PWM output
|
||
|
|
is assigned to one (or hottest of multiple) temperature zone(s) through the
|
||
|
|
pwm[1-3]_auto_channels_zone attributes. Each PWM output has 3 distinct output
|
||
|
|
duty-cycles: full, low, and min. Full is internally hard-wired to 255 (100%)
|
||
|
|
and low and min can be programmed via pwm[1-3]_auto_point1_pwm and
|
||
|
|
pwm[1-3]_auto_pwm_min, respectively. The thermal thresholds of the zones are
|
||
|
|
programmed via zone[1-3]_auto_point[1-3]_temp and
|
||
|
|
zone[1-3]_auto_point1_temp_hyst:
|
||
|
|
|
||
|
|
=============================== =======================================
|
||
|
|
pwm[1-3]_auto_point2_pwm full-speed duty-cycle (255, i.e., 100%)
|
||
|
|
pwm[1-3]_auto_point1_pwm low-speed duty-cycle
|
||
|
|
pwm[1-3]_auto_pwm_min min-speed duty-cycle
|
||
|
|
|
||
|
|
zone[1-3]_auto_point3_temp full-speed temp (all outputs)
|
||
|
|
zone[1-3]_auto_point2_temp full-speed temp
|
||
|
|
zone[1-3]_auto_point1_temp low-speed temp
|
||
|
|
zone[1-3]_auto_point1_temp_hyst min-speed temp
|
||
|
|
=============================== =======================================
|
||
|
|
|
||
|
|
The chip adjusts the output duty-cycle linearly in the range of auto_point1_pwm
|
||
|
|
to auto_point2_pwm if the temperature of the associated zone is between
|
||
|
|
auto_point1_temp and auto_point2_temp. If the temperature drops below the
|
||
|
|
auto_point1_temp_hyst value, the output duty-cycle is set to the auto_pwm_min
|
||
|
|
value which only supports two values: 0 or auto_point1_pwm. That means that the
|
||
|
|
fan either turns completely off or keeps spinning with the low-speed
|
||
|
|
duty-cycle. If any of the temperatures rise above the auto_point3_temp value,
|
||
|
|
all PWM outputs are set to 100% duty-cycle.
|
||
|
|
|
||
|
|
Following is another representation of how the chip sets the output duty-cycle
|
||
|
|
based on the temperature of the associated thermal zone:
|
||
|
|
|
||
|
|
=============== =============== =================
|
||
|
|
Temperature Duty-Cycle Duty-Cycle
|
||
|
|
Rising Temp Falling Temp
|
||
|
|
=============== =============== =================
|
||
|
|
full-speed full-speed full-speed
|
||
|
|
|
||
|
|
- < linearly -
|
||
|
|
adjusted
|
||
|
|
duty-cycle >
|
||
|
|
|
||
|
|
low-speed low-speed low-speed
|
||
|
|
- min-speed low-speed
|
||
|
|
min-speed min-speed min-speed
|
||
|
|
- min-speed min-speed
|
||
|
|
=============== =============== =================
|
||
|
|
|
||
|
|
|
||
|
|
Sysfs Attributes
|
||
|
|
----------------
|
||
|
|
|
||
|
|
Following is a list of all sysfs attributes that the driver provides, their
|
||
|
|
permissions and a short description:
|
||
|
|
|
||
|
|
=============================== ======= =======================================
|
||
|
|
Name Perm Description
|
||
|
|
=============================== ======= =======================================
|
||
|
|
cpu0_vid RO CPU core reference voltage in
|
||
|
|
millivolts.
|
||
|
|
vrm RW Voltage regulator module version
|
||
|
|
number.
|
||
|
|
|
||
|
|
in[0-7]_input RO Measured voltage in millivolts.
|
||
|
|
in[0-7]_min RW Low limit for voltage input.
|
||
|
|
in[0-7]_max RW High limit for voltage input.
|
||
|
|
in[0-7]_alarm RO Voltage input alarm. Returns 1 if
|
||
|
|
voltage input is or went outside the
|
||
|
|
associated min-max range, 0 otherwise.
|
||
|
|
|
||
|
|
temp[1-3]_input RO Measured temperature in millidegree
|
||
|
|
Celsius.
|
||
|
|
temp[1-3]_min RW Low limit for temp input.
|
||
|
|
temp[1-3]_max RW High limit for temp input.
|
||
|
|
temp[1-3]_offset RW Offset for temp input. This value will
|
||
|
|
be added by the chip to the measured
|
||
|
|
temperature.
|
||
|
|
temp[1-3]_alarm RO Alarm for temp input. Returns 1 if temp
|
||
|
|
input is or went outside the associated
|
||
|
|
min-max range, 0 otherwise.
|
||
|
|
temp[1-3]_fault RO Temp input fault. Returns 1 if the chip
|
||
|
|
detects a faulty thermal diode or an
|
||
|
|
unconnected temp input, 0 otherwise.
|
||
|
|
|
||
|
|
zone[1-3]_auto_channels_temp RO Temperature zone to temperature input
|
||
|
|
mapping. This attribute is a bitfield
|
||
|
|
and supports the following values:
|
||
|
|
|
||
|
|
- 1: temp1
|
||
|
|
- 2: temp2
|
||
|
|
- 4: temp3
|
||
|
|
zone[1-3]_auto_point1_temp_hyst RW Auto PWM temp point1 hysteresis. The
|
||
|
|
output of the corresponding PWM is set
|
||
|
|
to the pwm_auto_min value if the temp
|
||
|
|
falls below the auto_point1_temp_hyst
|
||
|
|
value.
|
||
|
|
zone[1-3]_auto_point[1-3]_temp RW Auto PWM temp points. Auto_point1 is
|
||
|
|
the low-speed temp, auto_point2 is the
|
||
|
|
full-speed temp, and auto_point3 is the
|
||
|
|
temp at which all PWM outputs are set
|
||
|
|
to full-speed (100% duty-cycle).
|
||
|
|
|
||
|
|
fan[1-6]_input RO Measured fan speed in RPM.
|
||
|
|
fan[1-6]_min RW Low limit for fan input.
|
||
|
|
fan[1-6]_alarm RO Alarm for fan input. Returns 1 if fan
|
||
|
|
input is or went below the associated
|
||
|
|
min value, 0 otherwise.
|
||
|
|
fan[1-4]_type RW Type of attached fan. Expressed in
|
||
|
|
number of pulses per revolution that
|
||
|
|
the fan generates. Supported values are
|
||
|
|
1, 2, and 4.
|
||
|
|
fan[5-6]_max RW Max attainable RPM at 100% duty-cycle.
|
||
|
|
Required for chip to adjust the
|
||
|
|
sampling rate accordingly.
|
||
|
|
|
||
|
|
pmw[1-3,5-6] RO/RW Duty-cycle of PWM output. Supported
|
||
|
|
values are 0-255 (0%-100%). Only
|
||
|
|
writeable if the associated PWM is in
|
||
|
|
manual mode.
|
||
|
|
pwm[1-3]_enable RW Enable of PWM outputs 1-3. Supported
|
||
|
|
values are:
|
||
|
|
|
||
|
|
- 0: turned off (output @ 100%)
|
||
|
|
- 1: manual mode
|
||
|
|
- 2: automatic mode
|
||
|
|
pwm[5-6]_enable RO Enable of PWM outputs 5-6. Always
|
||
|
|
returns 1 since these 2 outputs are
|
||
|
|
hard-wired to manual mode.
|
||
|
|
pmw[1-3,5-6]_freq RW Frequency of PWM output. Supported
|
||
|
|
values are in the range 11Hz-30000Hz
|
||
|
|
(default is 25000Hz).
|
||
|
|
pmw[1-3]_ramp_rate RW Ramp rate of PWM output. Determines how
|
||
|
|
fast the PWM duty-cycle will change
|
||
|
|
when the PWM is in automatic mode.
|
||
|
|
Expressed in ms per PWM step. Supported
|
||
|
|
values are in the range 0ms-206ms
|
||
|
|
(default is 0, which means the duty-
|
||
|
|
cycle changes instantly).
|
||
|
|
pwm[1-3]_auto_channels_zone RW PWM output to temperature zone mapping.
|
||
|
|
This attribute is a bitfield and
|
||
|
|
supports the following values:
|
||
|
|
|
||
|
|
- 1: zone1
|
||
|
|
- 2: zone2
|
||
|
|
- 4: zone3
|
||
|
|
- 6: highest of zone[2-3]
|
||
|
|
- 7: highest of zone[1-3]
|
||
|
|
pwm[1-3]_auto_pwm_min RW Auto PWM min pwm. Minimum PWM duty-
|
||
|
|
cycle. Supported values are 0 or
|
||
|
|
auto_point1_pwm.
|
||
|
|
pwm[1-3]_auto_point1_pwm RW Auto PWM pwm point. Auto_point1 is the
|
||
|
|
low-speed duty-cycle.
|
||
|
|
pwm[1-3]_auto_point2_pwm RO Auto PWM pwm point. Auto_point2 is the
|
||
|
|
full-speed duty-cycle which is hard-
|
||
|
|
wired to 255 (100% duty-cycle).
|
||
|
|
=============================== ======= =======================================
|
||
|
|
|
||
|
|
Chip Differences
|
||
|
|
----------------
|
||
|
|
|
||
|
|
======================= ======= ======= ======= =======
|
||
|
|
Feature dme1737 sch311x sch5027 sch5127
|
||
|
|
======================= ======= ======= ======= =======
|
||
|
|
temp[1-3]_offset yes yes
|
||
|
|
vid yes
|
||
|
|
zone3 yes yes yes
|
||
|
|
zone[1-3]_hyst yes yes
|
||
|
|
pwm min/off yes yes
|
||
|
|
fan3 opt yes opt yes
|
||
|
|
pwm3 opt yes opt yes
|
||
|
|
fan4 opt opt
|
||
|
|
fan5 opt opt
|
||
|
|
pwm5 opt opt
|
||
|
|
fan6 opt opt
|
||
|
|
pwm6 opt opt
|
||
|
|
in7 yes
|
||
|
|
======================= ======= ======= ======= =======
|