From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff Garzik <jgarzik@pobox.com>
Subject: Re: [PATCH] libata DMADIR support
Date: Tue, 18 May 2004 19:50:01 -0400
Sender: linux-ide-owner@vger.kernel.org
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	Tue, 18 May 2004 19:50:14 -0400
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List-Id: linux-ide@vger.kernel.org
To: Pat LaVarre <p.lavarre@ieee.org>
Cc: linux-ide@vger.kernel.org

Pat LaVarre wrote:
> +#ifdef ATAPI_ENABLE_DMADIR
> +	printk(KERN_DEBUG "ata%u: dev %u cfg "
> +	       "62:%04x\n",
> +	       ap->id, device, dev->id[62]);
> +	if (dev->id[62] & (1 << 15)) { /* 0x8000 DMADIR */
> +		u16 * id = dev->id;
> +		if (id[62] & (1 << 10)) { /* 0x0400 DMA */
> +			id[49] |= (1 << 8);
> +			id[63] |= ((id[62] >> 7) & 0x07); /* 0x0380 MWDMA */
> +			id[88] |= ((id[62] >> 0) & 0x3F); /* 0x007F UDMA */
> +		}
> +	}
> +#endif


Yeah, something like this needs to be done for DMADIR bridges.

	Jeff