From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Date: Thu, 11 Jan 2007 15:58:32 +0100
Subject: [U-Boot-Users] reg ISP 1561 integration with u-boot1.1.6
In-Reply-To: <20070111131321.133C735264F@atlas.denx.de>
References: <20070111131321.133C735264F@atlas.denx.de>
Message-ID: <200701111558.32850.matthias.fuchs@esd-electronics.com>
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To: u-boot@lists.denx.de

Hi Wolfgang, 

On Thursday 11 January 2007 14:13, Wolfgang Denk wrote:
> > These are different issues! usb_ohci.c uses readl and writel to access the 
> > controller's registers from the CPU (e.g. ohci.regs). The original code 
never
> > swaps here. But a PCI OHCI controller on a PowerPC needs it. The mXX_swap
> > macros are used to swap data fields in structures that are passed to the 
host
> > controller indirectly.
> 
> Be careful! Keep in mind that you may need both cases in one system,
> like using a PCI OHCI controller on a MPC5200 board where you have to
> support USB both on the internal USB controllers and on the PCI card.
> 
> See our linuxppc_2_4_devel tree for one possible implementation.

Now it's getting ugly. But I will give it a glace.

Matthias