From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 21 Jan 2008 06:41:57 +0000
Subject: Re: [BUG] cannot access IO ports in CMI8738 sound chip.
Message-Id: <20080121064157.GB31245@linux-sh.org>
List-Id: <linux-sh.vger.kernel.org>
References: <20080121.152550.68560038.matsu@igel.co.jp>
In-Reply-To: <20080121.152550.68560038.matsu@igel.co.jp>
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To: linux-sh@vger.kernel.org

On Mon, Jan 21, 2008 at 03:25:50PM +0900, Katsuya MATSUBARA wrote:
>  Unfortunately CMI8738 cannot treat (large) memory addresses
>  as IO port numers because some upper bits of 'Base Address
>  Register 0' in the PCI configuration space cannot be updated.
>  (pcibios_setup_bars() in arch/sh/drivers/pci/pci-auto.c
>  updates the register with the memory address.)
>  
>  How should I fix the problem?

Disable PCI_AUTO_UPDATE_RESOURCES like the dreamcast does?

It's a reasonable workaround for PCI-like host controllers that don't
"quite" comply with the PCI specification.