135 lines
4.4 KiB
Markdown
135 lines
4.4 KiB
Markdown
# ASUS P5Q
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This page describes how to run coreboot on the [ASUS P5Q] desktop board.
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## Working
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+ PCI slots
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+ PCI-e slots
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+ Onboard Ethernet
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+ USB
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+ Onboard sound card
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+ PS/2 keyboard
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+ All 4 DIMM slots
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+ S3 suspend and resume
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+ Red SATA ports
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+ Fan control through the W83667HG chip
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+ FireWire
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## Not working
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+ PS/2 mouse support
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+ PATA aka IDE (because of buggy IDE controller)
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+ Fan profiles with Q-Fan
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+ TPM module (support not implemented)
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## Untested
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+ S/PDIF
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+ CD Audio In
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+ Floppy disk drive
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## Flashing coreboot
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```eval_rst
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+-------------------+----------------+
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| Type | Value |
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+===================+================+
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| Socketed flash | Yes |
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+-------------------+----------------+
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| Model | MX25L8005 |
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+-------------------+----------------+
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| Size | 1 MiB |
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+-------------------+----------------+
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| Package | Socketed DIP-8 |
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+-------------------+----------------+
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| Write protection | No |
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+-------------------+----------------+
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| Dual BIOS feature | No |
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+-------------------+----------------+
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| Internal flashing | Yes |
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+-------------------+----------------+
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```
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You can flash coreboot into your motherboard using [this guide].
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## Technology
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```eval_rst
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+------------------+---------------------------------------------------+
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| Northbridge | Intel P45 (called x4x in coreboot code) |
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+------------------+---------------------------------------------------+
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| Southbridge | Intel ICH10R (called i82801jx in coreboot code) |
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+------------------+---------------------------------------------------+
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| CPU (LGA775) | Model f4x, f6x, 6fx, 1067x (Pentium 4, d, Core 2) |
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+------------------+---------------------------------------------------+
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| SuperIO | Winbond W83667HG |
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+------------------+---------------------------------------------------+
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| Coprocessor | No |
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+------------------+---------------------------------------------------+
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| Clockgen (CK505) | ICS 9LPRS918JKLF |
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+------------------+---------------------------------------------------+
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```
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## Controlling fans
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With vendor firmware, the P5Q uses the ATK0110 ACPI device to control its fans
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according to the parameters configured in the BIOS setup menu. With coreboot,
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one can instead control the Super I/O directly as described in the
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[kernel docs]:
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+ pwm1 controls fan1 (CHA_FAN1) and fan4 (CHA_FAN2)
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+ pwm2 controls fan2 (CPU_FAN)
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+ fan3 (PWR_FAN) cannot be controlled
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+ temp1 (board) can be used to control fan1 and fan4
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+ temp2 (CPU) can be used to control fan2
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### Manual fan speed
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These commands set the chassis fans to a constant speed:
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# Use PWM output
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echo 1 >/sys/class/hwmon/hwmon2/pwm1_mode
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# Set to manual mode
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echo 1 >/sys/class/hwmon/hwmon2/pwm1_enable
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# Set relative speed: 0 (stop) to 255 (full)
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echo 150 >/sys/class/hwmon/hwmon2/pwm1
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### Automatic fan speed
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The W83667HG can adjust fan speeds when things get too warm. These settings will
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control the chassis fans:
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# Set to "Thermal Cruise" mode
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echo 2 >/sys/class/hwmon/hwmon2/pwm1_enable
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# Target temperature: 60°C
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echo 60000 >/sys/class/hwmon/hwmon2/pwm1_target
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# Minimum fan speed when spinning up
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echo 135 >/sys/class/hwmon/hwmon2/pwm1_start_output
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# Minimum fan speed when spinning down
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echo 135 >/sys/class/hwmon/hwmon2/pwm1_stop_output
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# Tolerance: 2°C
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echo 2000 >/sys/class/hwmon/hwmon2/pwm1_tolerance
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# Turn fans off after 600 seconds when below defined range
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echo 600000 >/sys/class/hwmon/hwmon2/pwm1_stop_time
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You can also control the CPU fan with similar rules:
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# Switch to "Thermal Cruise" mode
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echo 2 >/sys/class/hwmon/hwmon2/pwm2_enable
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# Target temperature: 55°C
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echo 55000 >/sys/class/hwmon/hwmon2/pwm2_target
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# Minimum fan speed when spinning down
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echo 50 >/sys/class/hwmon/hwmon2/pwm2_stop_output
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# Rate of fan speed change
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echo 50 >/sys/class/hwmon/hwmon2/pwm2_step_output
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# Maximum fan speed
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echo 200 >/sys/class/hwmon/hwmon2/pwm2_max_output
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# Tolerance: 2°C
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echo 2000 >/sys/class/hwmon/hwmon2/pwm1_tolerance
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[ASUS P5Q]: https://www.asus.com/Motherboards/P5Q
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[this guide]: https://doc.coreboot.org/flash_tutorial/int_flashrom.html
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[kernel docs]: https://www.kernel.org/doc/Documentation/hwmon/w83627ehf.rst
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