[PATCH] Fix alignment issues with DMA TX on BCM4331

[Rafał Miłecki]

W dniu 14 sierpnia 2011 00:17 użytkownik David Woodhouse
<dwmw2 at infradead.org> napisał:
> On Sun, 2011-08-14 at 00:12 +0200, Rafał Miłecki wrote:
>> I've just checked wl and they don't do that anyway. The keep order
>> depending on the alignment bool.
>
> Ah, OK. So they still write TXCTL first, if the device can't support
> unaligned descriptors?
>
> The brcm80211 driver doesn't; it writes TXCTL last, unconditionally.
>
> Do you want me to send another patch which makes it conditional? It
> complicates the code with something that might be unnecessary legacy
> baggage... but means we don't have to be worried about regressions on
> older hardware.

Here you have a log from wl from 14e4:432b:

write32 0xfaafc208 <- 0x00000ff0
 read32 0xfaafc208 -> 0x00000000
[that means no unaligned support]
...
 read32 0xfaafc200 -> 0x00000000
write32 0xfaafc200 <- 0x00000801
write32 0xfaafc208 <- 0x1b550000
write32 0xfaafc20c <- 0x80000000
[when no unaligned, first enable, then set addresses]

-- 
Rafał