path: root/drivers/ata/ahci.c

/*
 *  ahci.c - AHCI SATA support
 *
 *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
 *    		    Please ALWAYS copy linux-ide@vger.kernel.org
 *		    on emails.
 *
 *  Copyright 2004-2005 Red Hat, Inc.
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 * libata documentation is available via 'make {ps|pdf}docs',
 * as Documentation/DocBook/libata.*
 *
 * AHCI hardware documentation:
 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/gfp.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>
#include "ahci.h"

#define DRV_NAME	"ahci"
#define DRV_VERSION	"3.0"

enum {
	AHCI_PCI_BAR		= 5,
};

enum board_ids {
	/* board IDs by feature in alphabetical order */
	board_ahci,
	board_ahci_ign_iferr,
	board_ahci_nosntf,
	board_ahci_yes_fbs,

	/* board IDs for specific chipsets in alphabetical order */
	board_ahci_mcp65,
	board_ahci_mcp77,
	board_ahci_mcp89,
	board_ahci_mv,
	board_ahci_sb600,
	board_ahci_sb700,	/* for SB700 and SB800 */
	board_ahci_vt8251,

	/* aliases */
	board_ahci_mcp_linux	= board_ahci_mcp65,
	board_ahci_mcp67	= board_ahci_mcp65,
	board_ahci_mcp73	= board_ahci_mcp65,
	board_ahci_mcp79	= board_ahci_mcp77,
};

static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
static int ahci_sb600_softreset(struct ata_link *link, unsigned int *class,
			  unsigned long deadline);
static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
				 unsigned long deadline);
static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
				unsigned long deadline);
#ifdef CONFIG_PM
static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
static int ahci_pci_device_resume(struct pci_dev *pdev);
#endif

static struct ata_port_operations ahci_vt8251_ops = {
	.inherits		= &ahci_ops,
	.hardreset		= ahci_vt8251_hardreset,
};

static struct ata_port_operations ahci_p5wdh_ops = {
	.inherits		= &ahci_ops,
	.hardreset		= ahci_p5wdh_hardreset,
};

static struct ata_port_operations ahci_sb600_ops = {
	.inherits		= &ahci_ops,
	.softreset		= ahci_sb600_softreset,
	.pmp_softreset		= ahci_sb600_softreset,
};

#define AHCI_HFLAGS(flags)	.private_data	= (void *)(flags)

static const struct ata_port_info ahci_port_info[] = {
	/* by features */
	[board_ahci] =
	{
		.flags		= AHCI_FLAG_COMMON,