linux-kernel - Re: [ANN] Atheros 802.11n USB firmware source code released

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Date:	Sun, 07 Jun 2009 11:43:34 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Maxim Levitsky <maximlevitsky@...il.com>
Cc:	"Luis R. Rodriguez" <mcgrof@...il.com>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	linux-kernel@...r.kernel.org, otus-devel@...ts.madwifi-project.org,
	David Woodhouse <dwmw2@...radead.org>,
	"John W. Linville" <linville@...driver.com>
Subject: Re: [ANN] Atheros 802.11n USB firmware source code released

On Sun, 2009-06-07 at 03:21 +0300, Maxim Levitsky wrote:

> > Is this source for same firmware that was closed?

Yes, but it was compiled differently afaik so you won't arrive at the
same binary.

> > Will AP mode work in future?

Well, not TYPE=AP, but we'll integrate whatever is necessary into one
firmware, I expect. It shouldn't be very hard given that AP mode really
works with the TYPE=STA firmware already, almost.

> What does this mean:
> 
> eeprom   : ORIGIN = 0x000000, LENGTH = 1024k
> 
> 
> Does the device have whole 1M of eeprom?
> What is there?

The eeprom is mapped there, but I don't think it's 1M, it's just the max
size of the mapping to the CPUs address space.

> Also what is this:
> 
> sram     : ORIGIN = 0x100000, LENGTH = 64k

This is just memory. It's used for buffering frames and dma descriptors
etc. internally. I want to change the code to do this with the linker
script rather than manually assigning addresses in the source. But if
you grep for this address you'll find how it's used.

> Description says that pram is 32K, but:
>  
> pram     : ORIGIN = 0x200000, LENGTH = 16k

Yeah, we're not exactly sure about this yet, but using 32k definitely
crashes the device.

johannes

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