Date: Tue, 11 Oct 2011 15:55:31 -0700 From: YongHyeon PYUN <pyunyh@gmail.com> To: Marius Strobl <marius@alchemy.franken.de> Cc: freebsd-net@freebsd.org, dave jones <s.dave.jones@gmail.com> Subject: Re: Question about GPIO bitbang MII Message-ID: <20111011225531.GD5661@michelle.cdnetworks.com> In-Reply-To: <20111011212318.GC81376@alchemy.franken.de> References: <CANf5e8bcAfrXX%2BuqzVRoZJPmsvyPegx%2BFOYHSt-GHwEigUCoeg@mail.gmail.com> <20111009165838.GA19886@alchemy.franken.de> <20111010192238.GC1781@michelle.cdnetworks.com> <20111011212318.GC81376@alchemy.franken.de>
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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. > Marius >
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