linux-kernel - Re: [PATCH] libata-sff: Allow for wacky systems

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Message-ID: <22963.1161683076@redhat.com>
Date:	Tue, 24 Oct 2006 10:44:36 +0100
From:	David Howells <dhowells@...hat.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	akpm@...l.org, jgarzik@...ox.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] libata-sff: Allow for wacky systems 

Alan Cox <alan@...rguk.ukuu.org.uk> wrote:

> There are some Linux supported platforms that simply cannot hit the low
> I/O addresses used by ATA legacy mode PCI mappings. These platforms have
> a window for PCI space that is fixed by the board logic and doesn't
> include the neccessary locations.
> 
> Provide a config option so that such platforms faced with a controller
> that they cannot support simply error it and punt

Yep, that works:

warthog>grep ATA_LEGACY .config
CONFIG_NO_ATA_LEGACY=y

...
pata_hpt37x: BIOS has not set timing clocks.                                    
hpt37x: HPT371: Bus clock 33MHz.                                                
ata1: PATA max UDMA/133 cmd 0xE4000820 ctl 0xE400082A bmdma 0xE4000C00 irq 20   
ata2: PATA max UDMA/133 cmd 0xE4000830 ctl 0xE400082E bmdma 0xE4000C08 irq 20   
scsi0 : pata_hpt37x                                                             
ATA: abnormal status 0x7D on port 0xE4000827                                    
scsi1 : pata_hpt37x                                                             
ATA: abnormal status 0x8 on port 0xE4000837                                     
pata_it821x: controller in smart mode.                                          
ata3: PATA max MWDMA2 cmd 0xE4000838 ctl 0xE4000842 bmdma 0xE4000850 irq 22     
ata4: PATA max MWDMA2 cmd 0xE4000848 ctl 0xE4000846 bmdma 0xE4000858 irq 22     
scsi2 : pata_it821x                                                             
scsi3 : pata_it821x                                                             
...


David
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