linux-kernel - Re: CFA 4.0 patch

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Message-ID: <20120515153818.3e70d845@pyramind.ukuu.org.uk>
Date:	Tue, 15 May 2012 15:38:18 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"Andre Hedrick (anhedric)" <anhedric@...co.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: Re: CFA 4.0 patch

> 044Ah: This is the alternate value of Word 0 turns on ATA device and
> turns off Removable Media and Removable Device while 	preserving all
> Retired bits in the word.
> 
> 0040h: This is the alternate value of Word 0 turns on ATA device and
> turns off Removable Media and Removable Device while 	zeroing all
> Retired bits in the word
> 
> Cheers,
> Andre
> --------------------
> The Linux X-ATA/SATA guy
      ^former ;)


> --- linux-2.6.32.orig/include/linux/ata.h	Mon May 14 15:48:24 2012
> +++ linux-2.6.32/include/linux/ata.h	Mon May 14 15:51:42 2012
> @@ -819,6 +819,10 @@
>  {
>  	if (id[ATA_ID_CONFIG] == 0x848A)	/* Traditional CF */
>  		return 1;
> +	if (id[ATA_ID_CONFIG] == 0x044A)	/* Alternative CF w/
> removable turned off, preserving retired bits */
> +		return 1;
> +	if (id[ATA_ID_CONFIG] == 0x0040)	/* Alternative CF w/
> removable turned off, zeroing retired bits*/
> +		return 1;

Do you have test case hardware for this that fails the other checks. I've
never ever come across any. I don't believe it exists at this point.

Also 2.6.32 is some years ago 8)

Alan
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