On Sat, 2007-03-24 at 16:00 +1100, Benjamin Herrenschmidt wrote:
> Hi folks !
>
> I mistakenly bought the wrong model... (the 2005 one that doesn't appear
> to work with MacOS 10.4.9 latest UVC driver).
>
> However, I've noticed that this camera works fine with the linux UVC
> driver. Since you guys have it listed as "support in progress", I wonder
> if you need some help there, in which case, I can try to spend some time
> digging in both source code and see if I can help bring some support for
> this model to maccam, or if it's already being taken care of.
>
> I'm totally unfamiliar with both drivers (though not with driver hacking
> in general) and fairly lazy so I'd be happy to just wait and see if
> support of it is close :-)
>
> (vendor 0x046d, device 0x08c5 btw)
More specifically, looking at the linux uvc driver, they do have a
special case for logitech for vendor controls. Here's a copy of a piece
of comment explaining it:
/* Logitech implements several vendor specific functions
* through vendor specific extension units (LXU).
*
* The LXU descriptors are similar to XU descriptors
* (see "USB Device Video Class for Video Devices", section
* 3.7.2.6 "Extension Unit Descriptor") with the following
* differences:
*
* ----------------------------------------------------------
* 0 bLength 1 Number
* Size of this descriptor, in bytes: 24+p+n*2
* ----------------------------------------------------------
* 23+p+n bmControlsType N Bitmap
* Individual bits in the set are defined:
* 0: Absolute
* 1: Relative
*
* This bitset is mapped exactly the same as bmControls.
* ----------------------------------------------------------
* 23+p+n*2 bReserved 1 Boolean
* ----------------------------------------------------------
* 24+p+n*2 iExtension 1 Index
* Index of a string descriptor that describes this
* extension unit.
* ----------------------------------------------------------
*/
Appart from that, a bunch of those Logitech announce themseves on USB as
vendor specific but are actually UVC compliant so it's mostly a matter of
tweaking the matching.
Ben.
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