Date: Mon, 18 Dec 2000 12:14:18 -0800 From: Julian Elischer <julian@elischer.org> To: Warner Losh <imp@village.org> Cc: Wes Peters <wes@softweyr.com>, Devin Butterfield <dbutter@wireless.net>, hackers@FreeBSD.ORG Subject: Re: Writing Device Drivers Message-ID: <3A3E701A.A104A940@elischer.org> References: <3A3E042F.7DEE0346@elischer.org> <3A3D513B.52737F48@wireless.net> <3A3D9D80.61F1EAFC@softweyr.com> <200012181732.KAA91834@harmony.village.org>
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Warner Losh wrote:
>
> In message <3A3E042F.7DEE0346@elischer.org> Julian Elischer writes:
> : I have the pci/isa driver skeleton pretty up-to-date, but it doesn't
> : have any DMA example code, nor does it have any sample code for
> : pccard or cardbus .
>
> Aren't there two kinds of DMA that we need to worry about? Those that
> are "isadma" where you have to program the DMA controller, and the
> more conventional DMA where the device becomes the bus master and the
> bytes just appear in host memory?
>
> Also, cardbus should be a 1 liner. I'll add that to your examples.
> Do you want to review them, or can I just do this and any other tweaks
> that might be necessary?
just add them.
I'll be as interested to see what it is as everyone else :-)
>
> Warner
>
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