Hello,
I’ve recently installed a Corsair Hydro Series H80i* integrated liquid CPU cooler in my work computer.** It works in Linux without any software, but Corsair has a Windows software package with some extra features and I was thinking of porting some of it to Linux. I’ve only just started looking at reverse engineering it, and I don't even know yet what it can do, but as far as I can tell it should at least have sensors for the fan rotation speeds, and it probably has at least one temperature sensor and allows software control of the fans’ speeds.
I intend to reverse engineer what the Corsair software does and make a little application to do at least those parts that I’m interested in, but I thought I might integrate the relevant parts of it in existing Linux tools. lm-sensors is the first that came to mind, so here I am. This is a sort of preemptive search for information. Perhaps some of you could offer some pointers about how best to handle integrating the functionality in lm-sensors (and maybe other things where it would make sense; I'm willing to do some work even on programs I don’t use as an exercise, though I’m not sure how much time I’ll be able to spend on that). Once I have some running code I’ll start digging through the site and the dev docs by myself, no need for RTFM answers, I’m just hoping that someone with experience could point me to the more relevant code & documentation or give some advice to avoid dead-ends or common mistakes. (In particular, the FAQ says “see doc/developers/new_drivers” for instructions, but at least in trunk that file seems to be missing, is there any replacement somewhere?)
The cooler uses an somewhat unusual (at least in my experience) technique: it connects to an internal USB header on the motherboard, and presents itself as a USB HID (human interface device), though to my knowledge it uses a manufacturer-specific interface (i.e., it does not masquerade as a keyboard or anything like that).
AFAIK lm-sensors does not seem to have support for anything USB-based, at least on first sight I didn’t notice any. Some pointers towards the best way to handle it would be welcome.
— Bogdan Butnaru
(**: The previous one, a no longer sold model from a different manufacturer, decided to spill its coolant all over the inside of the computer one night. After a day of washing everything with alcohol and forced drying, everything else seems to work.)
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