linux-kernel - Re: [PATCH 4/5] sis5513: backport short cables support from pata

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Date:	Tue, 26 Jun 2007 22:50:57 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] sis5513: backport short cables support from pata_sis.c

Bartlomiej Zolnierkiewicz wrote:

> Backport short cables support from pata_sis.c.

> This patch should allow UDMA > 2 modes on ASUS A6K.

> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>

Acked-by: Sergei Shtylyov <sshtylyov@...mvista.com>

> Index: b/drivers/ide/pci/sis5513.c
> ===================================================================
> --- a/drivers/ide/pci/sis5513.c
> +++ b/drivers/ide/pci/sis5513.c
[...]
> @@ -796,10 +796,33 @@ static unsigned int __devinit init_chips
>  	return 0;
>  }
>  
> +struct sis_laptop {
> +	u16 device;
> +	u16 subvendor;
> +	u16 subdevice;
> +};
> +
> +static const struct sis_laptop sis_laptop[] = {
> +	/* devid, subvendor, subdev */
> +	{ 0x5513, 0x1043, 0x1107 },	/* ASUS A6K */
> +	/* end marker */
> +	{ 0, }
> +};
> +
>  static u8 __devinit ata66_sis5513(ide_hwif_t *hwif)
>  {
> +	struct pci_dev *pdev = hwif->pci_dev;
> +	const struct sis_laptop *lap = &sis_laptop[0];
>  	u8 ata66 = 0;
>  
> +	while (lap->device) {
> +		if (lap->device == pdev->device &&
> +		    lap->subvendor == pdev->subsystem_vendor &&
> +		    lap->subdevice == pdev->subsystem_device)
> +			return ATA_CBL_PATA40_SHORT;
> +		lap++;
> +	}
> +

   The code even starts looking generic enough to be put into helper...

>  	if (chipset_family >= ATA_133) {
>  		u16 regw = 0;
>  		u16 reg_addr = hwif->channel ? 0x52: 0x50;

MBR, Sergei
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