From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id m4QFfYcF004717 for ; Mon, 26 May 2008 11:41:34 -0400 Received: from mu-out-0910.google.com (mu-out-0910.google.com [209.85.134.188]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id m4QFfILN031315 for ; Mon, 26 May 2008 11:41:19 -0400 Received: by mu-out-0910.google.com with SMTP id w8so1538782mue.1 for ; Mon, 26 May 2008 08:41:17 -0700 (PDT) Date: Mon, 26 May 2008 17:41:23 +0200 From: Domenico Andreoli To: Linux Driver Developers , video4linux-list@redhat.com Message-ID: <20080526154123.GA22979@ska.dandreoli.com> References: <20080525020028.GA22425@ska.dandreoli.com> <20080526073959.5a624288@gaivota> <20080526145830.GA22459@ska.dandreoli.com> <20080526121513.60a1ea21@gaivota> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080526121513.60a1ea21@gaivota> Cc: Subject: Re: TW6800 based video capture boards List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: video4linux-list-bounces@redhat.com Errors-To: video4linux-list-bounces@redhat.com List-ID: 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 -----[ Domenico Andreoli, aka cavok --[ http://www.dandreoli.com/gpgkey.asc ---[ 3A0F 2F80 F79C 678A 8936 4FEE 0677 9033 A20E BC50 -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list