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Message-ID: <52E11B68.5080309@bitfrost.no>
Date: Thu, 23 Jan 2014 14:38:48 +0100
From: Hans Petter Selasky <hps@bitfrost.no>
Organization: Bitfrost A/S
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To: Gleb Smirnoff <glebius@FreeBSD.org>, 
 Brock Williams <brock@cottonwoodcomputer.com>
Subject: Re: kern/183032: uep driver not working with eGalax touchcontroller
References: <201401230000.s0N002SO009456@freefall.freebsd.org>
 <20140123132705.GR66160@FreeBSD.org>
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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