Question about GPIO bitbang MII
marius at alchemy.franken.de
Wed Oct 12 20:42:24 UTC 2011
On Tue, Oct 11, 2011 at 03:55:31PM -0700, YongHyeon PYUN wrote:
> On Tue, Oct 11, 2011 at 11:23:18PM +0200, Marius Strobl wrote:
> > On Mon, Oct 10, 2011 at 12:22:38PM -0700, YongHyeon PYUN wrote:
> > > On Sun, Oct 09, 2011 at 06:58:38PM +0200, Marius Strobl wrote:
> > > > On Fri, Oct 07, 2011 at 10:34:58AM +0800, dave jones wrote:
> > > > > Hi,
> > > > >
> > > > > Does FreeBSD have gpio bitbang api for MII? If not, any driver in tree using
> > > > > gpio-bitbang mii that I can refer to? Thanks.
> > > > > It seems like OpenBSD, NetBSD and Linux have added support to gpio bitbang mii,
> > > > > and it's useful for porting embedded devices.
> > > > >
> > > >
> > > > If what you are referring to is their mii_bitbang.[c,h] then I've a patch
> > > > which (im)ports these and converts drivers to take advantage of it here:
> > > > http://people.freebsd.org/~marius/mii_bitbang.diff
> > >
> > > Patch looks good to me.
> > > What about other drivers(rl(4), bm(4), lge(4), tl(4), nge(4), wb(4)
> > > and xe(4))?
> > >
> > Meanwhile I've also converted bm(4), just re-fetch the patch. Generally
> > I've started with the drivers were the corresponding NetBSD one also
> > uses the common MII bitbang'ing code. As for nge(4), tl(4), wb(4) I'm
> > aware that these should also be convertible to the common code, I just
> > didn't get around to it so far. As for lge(4) that driver has some
> > remnants of MII bitbang'ing but doesn't actually use it AFAICT. I've
> Ah, I just blindly grepped the string, sorry.
> > previously missed rl(4) as I was only grepping beneath sys/dev and I
> > currently can't explain why I missed xe(4), so thanks for mentioning
> > these.
> > In my experience MII bitbang'ing is very fragile though and subtle
> > changes may break it so I don't want to commit these without testing
> > or in the case of smc(4) where at least the corresponding NetBSD
> > driver already uses the common code. Unfortunately, I only have
> > hardware for dc(4), stge(4), xl(4) and somewhere also for rl(4) and
> > tl(4) and I guess I can nwhitehorn@ regarding testing bm(4). Do you
> > happen to have hardware to test the remaining drivers, i.e. nge(4),
> > sis(4), ste(4), wb(4) and xe(4)?
> I have access to sis(4) and ste(4). I also have a nge(4) but I'm
> not able to access to the hardware, at least in US.
It would be great if you could test sis(4) and ste(4).
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