From: Domenico Andreoli <cavokz@gmail.com>
To: Linux Driver Developers <devel@driverdev.osuosl.org>,
video4linux-list@redhat.com
Subject: Re: TW6800 based video capture boards
Date: Mon, 26 May 2008 17:41:23 +0200 [thread overview]
Message-ID: <20080526154123.GA22979@ska.dandreoli.com> (raw)
In-Reply-To: <20080526121513.60a1ea21@gaivota>
On Mon, May 26, 2008 at 12:15:13PM -0300, Mauro Carvalho Chehab wrote:
>
> > I have also some thoughts for bttv-risc.c. What is it? It is used
> > to generate any RISC op-codes to be downloaded on the board? It seem
> > responsible for DMA operations.
>
> Yes, that's the idea. Those chips have a set of risc instructions that needed
> to be loaded. Those risc code will command data send, via DMA, to the
> motherboard.
It looks that also TW6800 has this machinery with similar instructions.
I could start an all-private risc file and let see what happens as
time flows.
> bttv, cx88 and cx23885 drivers share the same risc code,
> provided by btcx-risc.c. bttv-risc.c has some code that is specific for bttv.
btcx-risc.c is not modified bby the upstream patch.
> If you are willing to write a new driver, I suggest you to use a more modern
> driver as a model. I would suggest you to take cx88 as a model.
great ;)
ciao,
Domenico
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next prev parent reply other threads:[~2008-05-26 15:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080525020028.GA22425@ska.dandreoli.com>
[not found] ` <20080526073959.5a624288@gaivota>
2008-05-26 14:58 ` TW6800 based video capture boards Domenico Andreoli
2008-05-26 15:15 ` Mauro Carvalho Chehab
2008-05-26 15:41 ` Domenico Andreoli [this message]
[not found] ` <20090104151427.GA4683@tilt.dandreoli.com>
2009-05-25 11:55 ` TW6800 based video capture boards (updates) Vito
2009-05-25 12:34 ` Domenico Andreoli
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