Re: kern/183032: uep driver not working with eGalax touchcontroller

On 01/23/14 14:27, Gleb Smirnoff wrote:
> Hans, can you provide any advice on adding USB quirck. We've got
> different touchscreens that are identified and attached by uep(4),
> but they behave differently. Is there a way to fetch additional
> information from a device (vendor, revision, etc...)?

Hi,

Quirks can match on some fields in the USB device descriptor. See the 
usb_quirk.h header file.

struct usb_quirk_entry {
         uint16_t vid;
         uint16_t pid;
         uint16_t lo_rev;
         uint16_t hi_rev;
         uint16_t quirks[USB_SUB_QUIRKS_MAX];
};

vid: Vendor ID
pid: Product ID
hi_rev+lo_rev: Device revision.

You can match on vendor only too.

--HPS
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