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# Deepcool
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An unofficial Linux kernel module Provides early boot support and sysfs
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interface for monitoring and controlling device display modes for Deepcool
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||||||
Digital USB HID devices (CPU coolers, AIOs, cases). The module runs directly in
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kernel space, providing early boot support and standard Linux interfaces for
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controlling Deepcool Digital USB HID devices.
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## Motive
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[deepcool-digital-linux]: https://github.com/Nortank12/deepcool-digital-linux
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This project exists solely because I hoped to replace the userspace daemon with
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a kernel module that is always loaded. Simply put, I don't need it to be an
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userspace daemon, and I am under the impression that using the Linux kernel APIs
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directly will yield be better performance, or at least less overhead.
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[deepcool-digital-linux] is an userspace daemon that does a little more than
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this project, and is a more suitable replacement if you are not looking to taint
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your kernel with out-of-tree modules. Not that a "tainted kernel" is inherently
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bad, though. There are different usecases. See below for a better comparison
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between **Deepcool** (this module) and **deepcool-digital-linux**, the userspace
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daemon.
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## Features
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The primary feature of Deepcool is that it supports early boot, or in other
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words, its functionality fully available _as soon as you reach the kernel_. Rest
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of the functionality is almost identical with little caveats.
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- **Real-time Monitoring**: CPU temperature, usage, power, frequency
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- **Display Modes**: Auto-cycling, CPU temp, CPU usage, CPU power, and more
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- **Sysfs Interface**: Standard Linux interface for configuration
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- **Automatic Device Detection**: Supports most Deepcool Digital product series
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- **Multiple Device Series Support**:
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- AK Series (AK400 DIGITAL, AK500 DIGITAL, AK620 DIGITAL)
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||||||
- AK400 PRO, AK620 PRO
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||||||
- LS Series
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||||||
- AG Series
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- LQ Series
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||||||
- LD Series
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||||||
- LP Series
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||||||
- CH Series (Gen1, Gen2, CH510)
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> [!INFO]
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> **For device support, please refer to the
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||||||
> [device support matrix](#device-support-matrix) below**
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||||||
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If you believe there is anything missing that belongs in a kernel module, please
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||||||
feel free to let me know. I'd be happy to discuss.
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||||||
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||||||
## Usage
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To use Deepcool, you must load it in your kernel. The installation steps may
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||||||
differ based on your distro, but most distros should be supported out of the
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||||||
box.
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||||||
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||||||
### Requirements
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- Linux kernel 5.10 or later
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- Kernel headers for your running kernel
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- Build essentials (gcc, make)
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- Root/sudo access for installation
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#### Kernel Configuration
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||||||
The following kernel options must be enabled:
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```plaintext
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||||||
CONFIG_HID=y or m
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||||||
CONFIG_HIDRAW=y or m
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CONFIG_USB_HID=y or m
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||||||
CONFIG_THERMAL=y
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||||||
CONFIG_CPU_FREQ=y
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||||||
CONFIG_CPUFREQ_STATS=y
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||||||
CONFIG_SYSFS=y
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|
||||||
```
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|
||||||
|
|
||||||
Most of those features are enabled on most kernels, but is best to check before
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||||||
you build. `zcat` can be used to check the configuration for your current kernel
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|
||||||
configuration:
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|
||||||
|
|
||||||
```sh
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|
||||||
$ zcat /proc/config.gz | grep CONFIG_HID
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||||||
# => CONFIG_HIDRAW=y
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|
||||||
```
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|
||||||
|
|
||||||
For Intel RAPL power monitoring:
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|
||||||
|
|
||||||
```plaintext
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|
||||||
CONFIG_POWERCAP=y
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|
||||||
CONFIG_INTEL_RAPL=y or m
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|
||||||
```
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|
||||||
|
|
||||||
### Building
|
|
||||||
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|
||||||
Once you confirm that you meet the requirements, you may build the kernel
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|
||||||
module. To build, navigate to the cloned directory and run `make`.
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|
||||||
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|
||||||
```bash
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|
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$ make
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|
||||||
#=> The module will be built as `deepcool.ko`.
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|
||||||
```
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|
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## Installation
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|
||||||
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|
||||||
### Manual Installation
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|
||||||
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|
||||||
[DKMS framework]: https://wiki.archlinux.org/title/Dynamic_Kernel_Module_Support
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|
||||||
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|
||||||
The Makefile provides a task to install Deepcool for Linux distributions using
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|
||||||
the [DKMS framework]. NixOS should refer to the section below.
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|
||||||
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|
||||||
```bash
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|
||||||
# Build the module
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|
||||||
make
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|
||||||
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|
||||||
# Install to system
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|
||||||
sudo make dkms-install
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|
||||||
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|
||||||
# Load the module
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|
||||||
sudo modprobe deepcool
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|
||||||
```
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|
||||||
|
|
||||||
## Automatic Loading on Boot
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|
||||||
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|
||||||
Create a module configuration file:
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|
||||||
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|
||||||
```bash
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|
||||||
sudo tee /etc/modules-load.d/deepcool_digital.conf <<EOF
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|
||||||
deepcool
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|
||||||
EOF
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|
||||||
```
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|
||||||
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|
||||||
Once loaded, the module automatically detects connected Deepcool Digital devices
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|
||||||
and creates sysfs entries under `/sys/bus/hid/drivers/deepcool_digital/`.
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|
||||||
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|
||||||
### Finding Your Device
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|
||||||
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|
||||||
```bash
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|
||||||
# List all detected devices
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|
||||||
ls /sys/bus/hid/drivers/deepcool_digital/
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|
||||||
```
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|
||||||
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|
||||||
The device path will typically be something like:
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|
||||||
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|
||||||
```plaintext
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|
||||||
/sys/bus/hid/drivers/deepcool_digital/0003:3633:0007.XXXX/
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|
||||||
```
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|
||||||
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|
||||||
Replace `0003:3633:0007.XXXX` with your actual device path in the examples
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|
||||||
below.
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|
||||||
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|
||||||
### Sysfs Attributes
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|
||||||
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|
||||||
This module uses sysfs to interact with the module. You may find configuration
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|
||||||
attributes below.
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|
||||||
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|
||||||
#### Configuration Attributes (Read/Write)
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|
||||||
|
|
||||||
**`mode`** - Display mode
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|
||||||
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|
||||||
```bash
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|
||||||
# View current mode
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|
||||||
cat mode
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|
||||||
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|
||||||
# Set mode
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|
||||||
echo "cpu_temp" > mode
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|
||||||
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|
||||||
# Available modes:
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|
||||||
# - auto (cycle between supported metrics)
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|
||||||
# - cpu_temp (CPU temperature)
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|
||||||
# - cpu_usage (CPU usage percentage)
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|
||||||
# - cpu_power (CPU power consumption)
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|
||||||
# - cpu_freq (CPU frequency)
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|
||||||
# - cpu_fan (CPU fan speed, if supported)
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|
||||||
# - gpu_temp (GPU temperature, if supported)
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|
||||||
# - gpu_usage (GPU usage, if supported)
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|
||||||
# - gpu_power (GPU power, if supported)
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|
||||||
```
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|
||||||
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|
||||||
**`update_interval`** - Update interval in milliseconds (100-2000)
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|
||||||
|
|
||||||
```bash
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|
||||||
# View current interval
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|
||||||
cat update_interval
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|
||||||
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|
||||||
# Set to 500ms
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|
||||||
echo 500 > update_interval
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|
||||||
```
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|
||||||
|
|
||||||
**`fahrenheit`** - Temperature unit (0=Celsius, 1=Fahrenheit)
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|
||||||
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|
||||||
```bash
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|
||||||
# Use Fahrenheit
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|
||||||
echo 1 > fahrenheit
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|
||||||
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|
||||||
# Use Celsius
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|
||||||
echo 0 > fahrenheit
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|
||||||
```
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|
||||||
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|
||||||
**`alarm`** - Temperature alarm (0=off, 1=on)
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|
||||||
|
|
||||||
```bash
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|
||||||
# Enable alarm
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|
||||||
echo 1 > alarm
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|
||||||
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|
||||||
# Disable alarm
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|
||||||
echo 0 > alarm
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|
||||||
```
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|
||||||
|
|
||||||
#### Sensor Attributes (Read-Only)
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|
||||||
|
|
||||||
**`cpu_temp`** - CPU temperature (°C or °F based on fahrenheit setting)
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|
||||||
|
|
||||||
```bash
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|
||||||
cat cpu_temp
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|
||||||
```
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|
||||||
|
|
||||||
**`cpu_usage`** - CPU usage percentage (0-100)
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|
||||||
|
|
||||||
```bash
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|
||||||
cat cpu_usage
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|
||||||
```
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|
||||||
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|
||||||
**`cpu_power`** - CPU power consumption (Watts)
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|
||||||
|
|
||||||
```bash
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|
||||||
cat cpu_power
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|
||||||
```
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|
||||||
|
|
||||||
**`cpu_freq`** - CPU frequency (MHz)
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|
||||||
|
|
||||||
```bash
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|
||||||
cat cpu_freq
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|
||||||
```
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|
||||||
|
|
||||||
### Examples
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|
||||||
|
|
||||||
#### Set CPU temperature display with Fahrenheit
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|
||||||
|
|
||||||
```bash
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|
||||||
echo "cpu_temp" > /sys/bus/hid/drivers/deepcool_digital/0003:3633:0007.XXXX/mode
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|
||||||
echo 1 > fahrenheit
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|
||||||
echo 1 > alarm
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|
||||||
```
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|
||||||
|
|
||||||
#### Auto-cycle between metrics at 1-second intervals
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|
||||||
|
|
||||||
```bash
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|
||||||
echo "auto" > /sys/bus/hid/drivers/deepcool_digital/0003:3633:0007.XXXX/mode
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|
||||||
echo 1000 > /sys/bus/hid/drivers/deepcool_digital/0003:3633:0007.XXXX/update_interval
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|
||||||
```
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|
||||||
|
|
||||||
#### Monitor CPU power consumption
|
|
||||||
|
|
||||||
```bash
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|
||||||
echo "cpu_power" > /sys/bus/hid/drivers/deepcool_digital/0003:3633:0007.XXXX/mode
|
|
||||||
```
|
|
||||||
|
|
||||||
#### Create a simple monitoring script
|
|
||||||
|
|
||||||
```bash
|
|
||||||
#!/usr/bin/env bash
|
|
||||||
DEVICE="/sys/bus/hid/drivers/deepcool_digital/0003:3633:0007.XXXX"
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|
||||||
|
|
||||||
while true; do
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|
||||||
echo "CPU Temp: $(cat $DEVICE/cpu_temp)°C"
|
|
||||||
echo "CPU Usage: $(cat $DEVICE/cpu_usage)%"
|
|
||||||
echo "CPU Power: $(cat $DEVICE/cpu_power)W"
|
|
||||||
echo "CPU Freq: $(cat $DEVICE/cpu_freq)MHz"
|
|
||||||
echo "---"
|
|
||||||
sleep 1
|
|
||||||
done
|
|
||||||
```
|
|
||||||
|
|
||||||
## Device Support Matrix
|
|
||||||
|
|
||||||
<!-- markdownlint-disable MD013 -->
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|
||||||
|
|
||||||
| Device Series | Auto Mode | Alarm | Fahrenheit | Secondary Display | Rotation |
|
|
||||||
| ------------- | --------- | ------ | ---------- | ----------------- | -------- |
|
|
||||||
| AK Series | ✓ | ✓ | ✓ | ✗ | ✗ |
|
|
||||||
| AK400 PRO | ✓ | HW | ✓ | ✗ | ✗ |
|
|
||||||
| AK620 PRO | ✓ | HW | ✓ | ✗ | ✗ |
|
|
||||||
| LS Series | ✓ | ✓ | ✓ | ✗ | ✗ |
|
|
||||||
| AG Series | ✓ | ✓ | ✗ | ✗ | ✗ |
|
|
||||||
| LP Series | ✓ | ✗ | ✓ | ✓ | ✓ |
|
|
||||||
| LQ Series | ✓ | ✓ | ✓ | ✗ | ✗ |
|
|
||||||
| CH Series | ✓ | varies | varies | varies | ✗ |
|
|
||||||
|
|
||||||
<!-- markdownlint-enabled MD013 -->
|
|
||||||
|
|
||||||
**Legend:**
|
|
||||||
|
|
||||||
| Supported | Not Supported | Hardware-Controlled (Fixed thresholds) |
|
|
||||||
| :-------: | :-----------: | :------------------------------------: |
|
|
||||||
| ✓ | ✗ | HW |
|
|
||||||
|
|
||||||
## How It Works
|
|
||||||
|
|
||||||
### Initialization
|
|
||||||
|
|
||||||
1. Module loads and registers HID driver
|
|
||||||
2. Kernel calls `probe()` when device is detected
|
|
||||||
3. Driver identifies device series and capabilities
|
|
||||||
4. Sysfs attributes are created
|
|
||||||
5. Work queue is scheduled for periodic updates
|
|
||||||
|
|
||||||
### Runtime Operation
|
|
||||||
|
|
||||||
```
|
|
||||||
Timer fires (every update_interval ms)
|
|
||||||
↓
|
|
||||||
Work queue handler executes
|
|
||||||
↓
|
|
||||||
Read CPU sensors:
|
|
||||||
* Temperature from thermal subsystem
|
|
||||||
* Usage from kernel CPU statistics
|
|
||||||
* Frequency from CPUFreq
|
|
||||||
* Power from Intel RAPL
|
|
||||||
↓
|
|
||||||
Build device-specific packet
|
|
||||||
↓
|
|
||||||
Send HID output report over USB
|
|
||||||
↓
|
|
||||||
Display updates
|
|
||||||
↓
|
|
||||||
Reschedule work queue
|
|
||||||
```
|
|
||||||
|
|
||||||
### User Interaction
|
|
||||||
|
|
||||||
```
|
|
||||||
User writes to sysfs attribute
|
|
||||||
↓
|
|
||||||
Kernel calls store() handler
|
|
||||||
↓
|
|
||||||
Validate input
|
|
||||||
↓
|
|
||||||
Update device configuration
|
|
||||||
↓
|
|
||||||
Next work cycle uses new configuration
|
|
||||||
```
|
|
||||||
|
|
||||||
## Contributing
|
|
||||||
|
|
||||||
Contributions are always welcome! When submitting patches, please try to follow
|
|
||||||
the several recommendations:
|
|
||||||
|
|
||||||
- Tabs and 8 character indentations are heretical. A cardinal sin. Please don't
|
|
||||||
use those.
|
|
||||||
- Testing on your own hardware is recommended, but not a hard-requirement
|
|
||||||
- If there is device-specific behaviour (or non-behaviour), please document it!
|
|
||||||
- Include dmesg output for new devices
|
|
||||||
|
|
||||||
Refer to [BUILD.md](./BUILD.md) for additional notes on working with and
|
|
||||||
building Deepcool.
|
|
||||||
|
|
||||||
## License
|
|
||||||
|
|
||||||
GPL-2.0-only
|
|
||||||
|
|
||||||
## Attributions
|
|
||||||
|
|
||||||
[Nortank12]: https://github.com/Nortank12
|
|
||||||
[zenpower]: https://github.com/ocerman/zenpower
|
|
||||||
|
|
||||||
There are a few projects that I would like to give credit to. Namely I'd like to
|
|
||||||
thank the [deepcool-digital-linux] project for the inspiration and the device
|
|
||||||
data. This project would be incredibly annoying to do without the efforts of
|
|
||||||
[Nortank12]. Please make sure to give them some love!
|
|
||||||
|
|
||||||
I'd like to extend my thanks to the [zenpower] project that provided insight
|
|
||||||
into developing Linux kernel modules, and the DKMS installation tasks. Thank you
|
|
||||||
:)
|
|
||||||
|
|
||||||
## See Also
|
|
||||||
|
|
||||||
- [deepcool-digital-linux]: an userspace daemon providing similar functionality,
|
|
||||||
with better GPU support.
|
|
||||||
- Linux HID documentation: `Documentation/hid/` in kernel source
|
|
||||||
- Sysfs documentation: `Documentation/filesystems/sysfs.txt`
|
|
||||||
27
flake.lock
generated
27
flake.lock
generated
|
|
@ -1,27 +0,0 @@
|
||||||
{
|
|
||||||
"nodes": {
|
|
||||||
"nixpkgs": {
|
|
||||||
"locked": {
|
|
||||||
"lastModified": 1759381078,
|
|
||||||
"narHash": "sha256-gTrEEp5gEspIcCOx9PD8kMaF1iEmfBcTbO0Jag2QhQs=",
|
|
||||||
"owner": "nixos",
|
|
||||||
"repo": "nixpkgs",
|
|
||||||
"rev": "7df7ff7d8e00218376575f0acdcc5d66741351ee",
|
|
||||||
"type": "github"
|
|
||||||
},
|
|
||||||
"original": {
|
|
||||||
"owner": "nixos",
|
|
||||||
"ref": "nixos-unstable",
|
|
||||||
"repo": "nixpkgs",
|
|
||||||
"type": "github"
|
|
||||||
}
|
|
||||||
},
|
|
||||||
"root": {
|
|
||||||
"inputs": {
|
|
||||||
"nixpkgs": "nixpkgs"
|
|
||||||
}
|
|
||||||
}
|
|
||||||
},
|
|
||||||
"root": "root",
|
|
||||||
"version": 7
|
|
||||||
}
|
|
||||||
96
flake.nix
96
flake.nix
|
|
@ -1,96 +0,0 @@
|
||||||
{
|
|
||||||
inputs.nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
|
|
||||||
|
|
||||||
outputs = {
|
|
||||||
self,
|
|
||||||
nixpkgs,
|
|
||||||
}: let
|
|
||||||
system = "x86_64-linux";
|
|
||||||
pkgs = nixpkgs.legacyPackages.${system};
|
|
||||||
lib = nixpkgs.lib;
|
|
||||||
in {
|
|
||||||
packages."${system}" = let
|
|
||||||
inherit (pkgs.linuxPackages_latest) kernel;
|
|
||||||
kmod = pkgs.callPackage ./nix/kmod.nix {inherit kernel;};
|
|
||||||
in {
|
|
||||||
inherit kernel kmod;
|
|
||||||
};
|
|
||||||
|
|
||||||
nixosConfigurations."gamma" = let
|
|
||||||
inherit (lib) nixosSystem;
|
|
||||||
inherit (lib.modules) mkDefault;
|
|
||||||
in
|
|
||||||
nixosSystem {
|
|
||||||
system = null;
|
|
||||||
modules = [
|
|
||||||
({modulesPath, ...}: {
|
|
||||||
imports = [(modulesPath + "/profiles/qemu-guest.nix")];
|
|
||||||
networking.hostName = "gamma";
|
|
||||||
|
|
||||||
boot = {
|
|
||||||
growPartition = false;
|
|
||||||
kernelParams = ["console=ttyAMA0,115200n8" "console=tty0"];
|
|
||||||
consoleLogLevel = mkDefault 7; # ground control to kernel
|
|
||||||
};
|
|
||||||
|
|
||||||
# Empty password
|
|
||||||
# root can login without a password
|
|
||||||
users.extraUsers.root.initialHashedPassword = "";
|
|
||||||
|
|
||||||
# Nixpkgs options
|
|
||||||
nixpkgs.pkgs = pkgs; # discard everything else, follow flake `pkgs`
|
|
||||||
|
|
||||||
# Packages
|
|
||||||
environment.systemPackages = [pkgs.microfetch];
|
|
||||||
|
|
||||||
# Bootable
|
|
||||||
fileSystems."/boot" = {
|
|
||||||
device = "/dev/vda1";
|
|
||||||
fsType = "vfat";
|
|
||||||
};
|
|
||||||
|
|
||||||
fileSystems."/" = {
|
|
||||||
device = "/dev/vda2";
|
|
||||||
fsType = "ext4";
|
|
||||||
};
|
|
||||||
|
|
||||||
boot.loader.grub = {
|
|
||||||
efiSupport = true;
|
|
||||||
efiInstallAsRemovable = true;
|
|
||||||
device = "nodev";
|
|
||||||
};
|
|
||||||
|
|
||||||
# Kernel fun
|
|
||||||
boot = {
|
|
||||||
# Use kernel package defined in flake.nix
|
|
||||||
kernelPackages = pkgs.linuxPackagesFor self.packages.${system}.kernel; # exposed kernel
|
|
||||||
|
|
||||||
# Get test module from flake outputs
|
|
||||||
extraModulePackages = [self.packages.${system}.kmod];
|
|
||||||
|
|
||||||
# Load module from package.
|
|
||||||
# Alternatively, `$ modprobe test` would work too
|
|
||||||
kernelModules = ["deepcool"];
|
|
||||||
};
|
|
||||||
|
|
||||||
# Make it smaller
|
|
||||||
documentation = {
|
|
||||||
doc.enable = false;
|
|
||||||
man.enable = false;
|
|
||||||
nixos.enable = false;
|
|
||||||
info.enable = false;
|
|
||||||
};
|
|
||||||
|
|
||||||
# Get out.
|
|
||||||
programs = {
|
|
||||||
bash.completion.enable = false;
|
|
||||||
command-not-found.enable = false;
|
|
||||||
};
|
|
||||||
|
|
||||||
# Shut up.
|
|
||||||
system.stateVersion = "25.11";
|
|
||||||
})
|
|
||||||
];
|
|
||||||
};
|
|
||||||
};
|
|
||||||
}
|
|
||||||
76
nix/kmod.nix
76
nix/kmod.nix
|
|
@ -1,76 +0,0 @@
|
||||||
{
|
|
||||||
lib,
|
|
||||||
stdenv,
|
|
||||||
linuxPackages_latest,
|
|
||||||
kernel ? linuxPackages_latest.kernel,
|
|
||||||
...
|
|
||||||
}: let
|
|
||||||
pname = "deepcool";
|
|
||||||
version = "0.1.0";
|
|
||||||
in
|
|
||||||
stdenv.mkDerivation {
|
|
||||||
inherit pname version;
|
|
||||||
|
|
||||||
src = let
|
|
||||||
fs = lib.fileset;
|
|
||||||
sp = ../.;
|
|
||||||
in
|
|
||||||
fs.toSource {
|
|
||||||
root = sp;
|
|
||||||
fileset = fs.unions [
|
|
||||||
(sp + /deepcool.c)
|
|
||||||
(sp + /Makefile)
|
|
||||||
];
|
|
||||||
};
|
|
||||||
|
|
||||||
enableParallelBuilding = true;
|
|
||||||
nativeBuildInputs = kernel.moduleBuildDependencies;
|
|
||||||
hardeningDisable = ["pic" "format"];
|
|
||||||
|
|
||||||
env = {
|
|
||||||
KVERSION = kernel.modDirVersion;
|
|
||||||
INSTALL_MOD_PATH = builtins.placeholder "out";
|
|
||||||
};
|
|
||||||
|
|
||||||
buildPhase = ''
|
|
||||||
runHook preBuild
|
|
||||||
echo "Kernel version: $KVERSION"
|
|
||||||
make -C ${kernel.dev}/lib/modules/${kernel.modDirVersion}/build \
|
|
||||||
M=$(pwd) \
|
|
||||||
modules
|
|
||||||
runHook postBuild
|
|
||||||
'';
|
|
||||||
|
|
||||||
installPhase = ''
|
|
||||||
runHook preInstall
|
|
||||||
echo "Module Installation Path: $INSTALL_MOD_PATH"
|
|
||||||
make -C ${kernel.dev}/lib/modules/${kernel.modDirVersion}/build \
|
|
||||||
M=$(pwd) \
|
|
||||||
modules_install
|
|
||||||
runHook postInstall
|
|
||||||
'';
|
|
||||||
|
|
||||||
postInstall = ''
|
|
||||||
if [ -d $out/lib/modules/${kernel.modDirVersion}/extra ]; then
|
|
||||||
mkdir -p $out/lib/modules/${kernel.modDirVersion}/kernel/drivers/hid
|
|
||||||
find $out/lib/modules/${kernel.modDirVersion}/extra -name "*.ko*" \
|
|
||||||
-exec mv {} $out/lib/modules/${kernel.modDirVersion}/kernel/drivers/hid/ \;
|
|
||||||
rmdir $out/lib/modules/${kernel.modDirVersion}/extra 2>/dev/null || true
|
|
||||||
fi
|
|
||||||
'';
|
|
||||||
|
|
||||||
passthru = {
|
|
||||||
inherit kernel;
|
|
||||||
kernelVersion = kernel.modDirVersion;
|
|
||||||
moduleName = "deepcool_digital";
|
|
||||||
modulePath = "kernel/drivers/hid/deepcool_digital.ko";
|
|
||||||
};
|
|
||||||
|
|
||||||
meta = {
|
|
||||||
description = "Linux kernel module for Deepcool Digital USB HID devices";
|
|
||||||
license = lib.licenses.gpl2Plus;
|
|
||||||
maintainers = [];
|
|
||||||
platforms = lib.platforms.linux;
|
|
||||||
broken = lib.versionOlder kernel.version "5.10";
|
|
||||||
};
|
|
||||||
}
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue