CFI Byte order problem

[Mori Hiroki]

I have AR2316 datasheet from net. This document have

3.1.4 Byteswap Control

This document have not parallel flash(cfi) information 
because of AR2316 don't have cfi interface. I guess
AR9132 datasheet have it.

I think two case. One is cfi byte swap is soc default.
Other is U-Boot is set to this control.

I use Buffalo WZR-HP-G300NH 1stGen.

http://www.dd-wrt.com/wiki/index.php/Buffalo_WZR-HP-G300NH


This router have 32MByte cfi flash 16 bit bus wide.

I think add check byte swap contole in cfi_core.c is more better.

Do you think this?

Regards.

Hiroki Mori

----- Original Message -----
> From: Adrian Chadd <adrian.chadd at gmail.com>
> To: Mori Hiroki <yamori813 at yahoo.co.jp>
> Cc: Warner Losh <imp at bsdimp.com>; "freebsd-mips at freebsd.org" <freebsd-mips at freebsd.org>
> Date: 2016/2/5, Fri 14:23
> Subject: Re: CFI Byte order problem
> 
> I have the AR9132 datasheet. What's the CFI hooked up to? That's what
> I'm confused about, the AR9132 doesn't /have/ a parallel flash
> interface. :P
> 
> 
> 
> -a
> 
> 
> On 4 February 2016 at 20:17, Mori Hiroki <yamori813 at yahoo.co.jp> wrote:
>>  I don't have AR9132 datasheet. But Some other Atheros datasheet
>>  tell to know Byteswap Control register. I think if Atheros open
>>  the AR9132 datasheet, then set correct to Byteswap Control
>>  register. But It's impossible, then ifdef workaround.
>> 
>>  Hiroki Mori
>> 
>>  ----- Original Message -----
>>> From: Warner Losh <imp at bsdimp.com>
>>> To: Mori Hiroki <yamori813 at yahoo.co.jp>
>>> Cc: "freebsd-mips at freebsd.org" 
> <freebsd-mips at freebsd.org>
>>> Date: 2016/2/5, Fri 13:04
>>> Subject: Re: CFI Byte order problem
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> On Thu, Feb 4, 2016 at 8:31 AM, Mori Hiroki 
> <yamori813 at yahoo.co.jp> wrote:
>>> 
>>> Hi.
>>>> 
>>>> I build Current for AR9132. But don't recognize cfi flash 
> memory.
>>>> I make debug write and found byte endian issue. I seem AR9132
>>>> is byte swap in cfi flash memory by default. Current cif code is
>>>> byte swap on Big Endian machine. This is conflict.
>>>> 
>>>> I make workaound by option for this problem.
>>>> 
>>>> https://github.com/yamori813/freebsd/commit/2da6531d24e0d689763f25055420078a63a08baa
>>> 
>>> 
>>> Why the #ifdef? Why not always swap on big endian platforms?
>>> 
>>> 
>>> Warner
>>> 
>>> 
>>> 
>>> 
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