linux-imx

/*

 *    pata_sis.c - SiS ATA driver

 *

 *  (C) 2005 Red Hat

 *  (C) 2007,2009 Bartlomiej Zolnierkiewicz

 *

 *    Based upon linux/drivers/ide/pci/sis5513.c

 * Copyright (C) 1999-2000  Andre Hedrick <andre@linux-ide.org>

 * Copyright (C) 2002       Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer

 * Copyright (C) 2003       Vojtech Pavlik <vojtech@suse.cz>

 * SiS Taiwan       : for direct support and hardware.

 * Daniela Engert   : for initial ATA100 advices and numerous others.

 * John Fremlin, Manfred Spraul, Dave Morgan, Peter Kjellerstedt    :

 *            for checking code correctness, providing patches.

 * Original tests and design on the SiS620 chipset.

 * ATA100 tests and design on the SiS735 chipset.

 * ATA16/33 support from specs

 * ATA133 support for SiS961/962 by L.C. Chang <lcchang@sis.com.tw>

 *

 *

 *  TODO

 *  Check MWDMA on drives that don't support MWDMA speed pio cycles ?

 *  More Testing

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/blkdev.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <scsi/scsi_host.h>

#include <linux/libata.h>

#include <linux/ata.h>

#include "sis.h"

​

#define DRV_NAME    "pata_sis"

#define DRV_VERSION "0.5.2"

​

struct sis_chipset {

    u16 device;             /* PCI host ID */

    const struct ata_port_info *info;   /* Info block */

    /* Probably add family, cable detect type etc here to clean

       up code later */

};

​

struct sis_laptop {

    u16 device;

    u16 subvendor;

    u16 subdevice;

};

​

static const struct sis_laptop sis_laptop[] = {

    /* devid, subvendor, subdev */

    { 0x5513, 0x1043, 0x1107 }, /* ASUS A6K */

    { 0x5513, 0x1734, 0x105F }, /* FSC Amilo A1630 */

    { 0x5513, 0x1071, 0x8640 }, /* EasyNote K5305 */

    /* end marker */

    { 0, }

};

​

static int sis_short_ata40(struct pci_dev *dev)

{

    const struct sis_laptop *lap = &sis_laptop[0];

​

    while (lap->device) {

        if (lap->device == dev->device &&

            lap->subvendor == dev->subsystem_vendor &&

            lap->subdevice == dev->subsystem_device)

            return 1;

        lap++;

    }

​

    return 0;

}

​

/**

 *  sis_old_port_base - return PCI configuration base for dev

 *  @adev: device

 *

 *  Returns the base of the PCI configuration registers for this port

 *  number.

 */

​

static int sis_old_port_base(struct ata_device *adev)

{

    return 0x40 + (4 * adev->link->ap->port_no) + (2 * adev->devno);

}

​

/**

 *  sis_port_base - return PCI configuration base for dev

 *  @adev: device