linux-kernel - Re: [PATCH] sata_via: PATA support, resubmit

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Date:	Mon, 08 Jan 2007 11:34:00 -0500
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Alan <alan@...rguk.ukuu.org.uk>
CC:	akpm@...l.org, torvalds@...l.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sata_via: PATA support, resubmit

Alan wrote:
>> Just separate PATA and SATA operations.  That way everything works as 
>> expected, and you don't unintentionally add lovely oopses all over the 
>> place.
> 
> Ok - based on your pointers to [ab]using port_start you want something
> like this for now, with the port_start evaporating when Tejun's probe
> changes go in ?
> 
> Signed-off-by: Alan Cox <alan@...hat.com>

Looks good to me, modulo minor comments below...



> +static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
> +{
> +	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
> +	static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
> +	if (ap->port_no == PATA_PORT)
> +		pci_write_config_byte(pdev, PATA_PIO_TIMING, pio_bits[adev->pio_mode - XFER_PIO_0]);
> +}
> +
> +static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
> +{
> +	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
> +	static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
> +	if (ap->port_no == PATA_PORT)
> +		pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->pio_mode - XFER_UDMA_0]);
> +}

You can kill the '== PATA_PORT' tests now.

	Jeff


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