From: Mark Lord <kernel@teksavvy.com>
To: Richard <tuxbox.guru@gmail.com>
Cc: linux-ide@vger.kernel.org
Subject: Re: Marvel PMP SATA controller
Date: Fri, 01 Oct 2010 09:46:25 -0400 [thread overview]
Message-ID: <4CA5E631.2030903@teksavvy.com> (raw)
In-Reply-To: <4CA498B5.6090503@gmail.com>
On 10-09-30 10:03 AM, Richard wrote:
> On 30/09/10 14:39, Mark Lord wrote:
..
>> Does the existing libata parameter take care of it for you?
>>
>> linux/Documentation/kernel-parameters.txt:
>> eg. libata.force=[ID:]1.5" ## replace [ID:] with port[.device] for the PMP and/or HD
>>
> Unfortunately not.. which is why I asked how to write commands directly on to the SATA bus from kernel space.
Right. Well, just keep plunking away at it in that ancient kernel, then.
The two modern routines to study/backport are sata_pmp_read() and sata_pmp_write(),
which are used by most controllers to perform PMP register accesses.
However, the host controller may require additional tweaks,
especially if it is a Marvell host controller (sata_mv),
or something that doesn't normally "do" PMP, like ata_piix.
Cheers
prev parent reply other threads:[~2010-10-01 13:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-29 6:56 Marvel PMP SATA controller Richard
2010-09-29 19:56 ` Mark Lord
2010-09-29 20:32 ` Richard
2010-09-30 13:39 ` Mark Lord
2010-09-30 14:03 ` Richard
2010-10-01 0:24 ` Robert Hancock
2010-10-01 6:33 ` Richard
2010-10-01 13:46 ` Mark Lord [this message]
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