Call for Test and Review: bwn(4) - another Broadcom Wireless driver

[Weongyo Jeong]

On Mon, Mar 01, 2010 at 10:32:40AM +0200, Alexandr Rybalko wrote:
> On Sun, 28 Feb 2010 01:52:59 -0800
> Weongyo Jeong <weongyo.jeong at gmail.com> wrote:
> 
> >> On Sat, Feb 27, 2010 at 01:15:35AM +0200, Alex RAY wrote:
> >> > Hi Weongyo,
> >> > 
> >> > Can new siba release operate in systems like in this SVG image?
> >> > System example: CPU BCM5836 + Wi-Fi BCM4318
> >> 
> >> Recent changes of siba(4) by myself doesn't change code flow, layout and
> >> doesn't include enhancements if you're an user of SENTRY5 mips CPU (like
> >> BCM5836)
> >> 
> >> All I did on recent changes were to put common routines or codes which
> >> could be used for original siba(4).  These codes are only used for
> >> bwn(4) driver currently and don't be merged with original siba(4).  That
> >> means there are two separated codes in current siba(4) so merging two
> >> into one is a TODO.
> >> 
> >> I have no idea current siba(4) supports a system using on CPU BCM5836 +
> >> Wi-Fi BCM4318 but in theory it should work without problems though I
> >> didn't test.
> >> 
> >> > And can we compile siba bus code without pci code?
> >> 
> >> I think it looks that it could be possible to compile without pci code.
> >> But makes sure that your device doesn't have PCI core.
> 
> Can You test your driver without siba_switchcore, I see the device
> have mapping for all cores on SSB?

I see what you mean.  siba_core.c which depends on PCI code would be
compiled when it builds on SENTRY5.  So it looks currently it needs a
patch to compile siba bus code without PCI code.  I'll try to make a
patch.

> > ssb0: <Broadcom BCM4315 802.11b/g Wireless> mem 0xf4000000-0xf4003fff 
> Think thre is 4 cores.
> When SSB on nexus, we don`t need core switching, maybe on PCI too.

I think this is a difference between siba(4) and siba_bwn currently and
it's one of TODOs we should solve to merge two codes.

AFAIK approach to access each cores isn't same; it looks siba(4) creates
devices for each cores so it'd not need to switch cores.  But siba_bwn
doesn't do it like siba(4) so it needs to switch cores because all are
handled on one device.

regards,
Weongyo Jeong