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Date: Sat, 01 Nov 2008 21:44:51 +1000 From: Adam Nielsen <a.nielsen@...kadi.net> To: LKML Mailinglist <linux-kernel@...r.kernel.org> Subject: Can you use the USB HID interface within a driver? Hi all, I'm about to start writing a driver for a Gigabyte Odin PC power supply. This device has a USB connection which allows you to monitor temperature, voltages, current, etc. Before I start coding the USB side of things, I'd just like some advice as to the best way of communicating with the device. I would rather write the driver in kernel space (so that it "just works" and provides a hwmon interface without installing extra software), however the device already appears to the system as a USB HID device, and so gets claimed by the existing usbhid driver. Is there any way to interface with the HID driver from within another driver? Or will I have to claim the device first (or disconnect usbhid), and communicate with it myself? I've tried to find some example code from a driver that already does this (such as a USB keyboard driver) but I'm having some trouble finding one! The closest drivers I can find are all the ones in drivers/hid/usbhid, but they all seem to be "embedded" in hid-core.c. Does that mean I need to modify hid-core.c to call my driver? Or perhaps someone could point me in the direction of a USB HID driver that does things "properly" already? Many thanks, Adam. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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