From: Mark Lord <liml@rtr.ca>
To: Tejun Heo <htejun@gmail.com>
Cc: jgarzik@pobox.com, linux-ide@vger.kernel.org,
albertcc@tw.ibm.com, alan@lxorguk.ukuu.org.uk
Subject: Re: [PATCHSET] libata: reorganize configuration and implement revalidation
Date: Thu, 26 Jan 2006 12:42:37 -0500 [thread overview]
Message-ID: <43D90A0D.6000900@rtr.ca> (raw)
In-Reply-To: <1138289951261-git-send-email-htejun@gmail.com>
Tejun Heo wrote:
>
> Also, please pay attention to the following. It's taken from #08's
> description.
>
> This function is probably the place to set transfer mode to PIO0
> before IDENTIFY. However, reset -> identify -> init_dev_params
> order should be kept for pre-ATA4 devices so we cannot set transfer
> mode before IDENTIFY for them. How do we know if a device is
> post-ATA4 before IDENTIFY?
>
> How should we do this? Ignore pre-ATA4 devices?
It should be more a matter of setting the chipset to PIO0
before doing the IDENTIFY.
The drives themselves should "just work", as the RESET would
have bumped them back to their default (slow) PIO timing mode.
IDENTIFY has to be the very first drive command, so there's no
way to do a SET_FEATURES/XFER_MODE beforehand.
-ml
prev parent reply other threads:[~2006-01-26 17:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-26 15:39 [PATCHSET] libata: reorganize configuration and implement revalidation Tejun Heo
2006-01-26 15:39 ` [PATCH 01/16] libata: implement ata_dev_id_c_string() Tejun Heo
2006-01-26 15:39 ` [PATCH 05/16] libata: make ata_dump_id() take @id instead of @dev Tejun Heo
2006-01-26 15:39 ` [PATCH 04/16] libata: separate out ata_id_major_version() Tejun Heo
2006-01-26 15:39 ` [PATCH 12/16] libata: reorganize ata_bus_probe() Tejun Heo
2006-01-26 15:39 ` [PATCH 11/16] libata: fold ata_dev_config() into ata_dev_configure() Tejun Heo
2006-01-26 15:39 ` [PATCH 09/16] libata: kill ata_dev_reread_id() Tejun Heo
2006-01-26 15:39 ` [PATCH 02/16] libata: use ata_dev_id_c_string() Tejun Heo
2006-01-26 15:39 ` [PATCH 07/16] libata: convert dev->id to pointer Tejun Heo
2006-01-26 15:39 ` [PATCH 15/16] libata: implement ata_dev_revalidate() Tejun Heo
2006-01-26 15:39 ` [PATCH 16/16] libata: revalidate after transfer mode configuration Tejun Heo
2006-01-26 15:39 ` [PATCH 13/16] libata: re-initialize parameters before configuring Tejun Heo
2006-01-26 17:42 ` Mark Lord [this message]
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