linux-kernel - Re: [PATCHv3 07/11] USB: gadget: g_multi: added documentation and INF files

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Date:	Wed, 2 Jun 2010 21:38:54 +0800
From:	Xiaofan Chen <xiaofanc@...il.com>
To:	Michal Nazarewicz <m.nazarewicz@...sung.com>
Cc:	linux-usb@...r.kernel.org,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 07/11] USB: gadget: g_multi: added documentation and INF 
	files

On Wed, Jun 2, 2010 at 8:45 PM, Michal Nazarewicz
<m.nazarewicz@...sung.com> wrote:

> +**** Customising the gadget
> +
> +If you intend to hack the g_multi gadget be advised that rearranging
> +functions will obviously change interface numbers for each of the
> +functionality.  As an effect provided INFs won't work since they have
> +interface numbers hard-coded in them (it's not hard to change those
> +though).

Probably you can show an example of how to add the "&MI_mm"
to the VID/PID.

A good reference here:
http://www.cygnal.org/ubb/Forum9/HTML/001050.html

> +This also means, that after experimenting with g_multi and changing
> +provided functions one should change gadget's vendor and/or product ID
> +so there will be no collision with other customised gadgets or the
> +original gadget.
> +
> +Failing to comply may cause brain damage after wondering for hours why
> +things don't work as intended before realising Windows have cached
> +some drivers information (changing USB port may sometimes help).
> +

This is indeed quite true. However, you may not need to really change
the VID/PID (it will work but not necessary) if you use the nice
usbdeview utility to remove the phantom USB device.
http://www.nirsoft.net/utils/usb_devices_view.html



-- 
Xiaofan http://mcuee.blogspot.com
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