/*
 *  linux/drivers/block/falconide.c -- Atari Falcon IDE Driver
 *
 *     Created 12 Jul 1997 by Geert Uytterhoeven
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of this archive for
 *  more details.
 */

#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>

#include "ide.h"

#include <asm/atarihw.h>
#include <asm/atariints.h>
#include <asm/atari_stdma.h>


    /*
     *  Base of the IDE interface
     */

#define ATA_HD_BASE	0xfff00000

    /*
     *  Offsets from the above base
     */

#define ATA_HD_DATA	0x00
#define ATA_HD_ERROR	0x05		/* see err-bits */
#define ATA_HD_NSECTOR	0x09		/* nr of sectors to read/write */
#define ATA_HD_SECTOR	0x0d		/* starting sector */
#define ATA_HD_LCYL	0x11		/* starting cylinder */
#define ATA_HD_HCYL	0x15		/* high byte of starting cyl */
#define ATA_HD_SELECT	0x19		/* 101dhhhh , d=drive, hhhh=head */
#define ATA_HD_STATUS	0x1d		/* see status-bits */
#define ATA_HD_CONTROL	0x39

static const int falconide_offsets[IDE_NR_PORTS] = {
    ATA_HD_DATA, ATA_HD_ERROR, ATA_HD_NSECTOR, ATA_HD_SECTOR, ATA_HD_LCYL,
    ATA_HD_HCYL, ATA_HD_SELECT, ATA_HD_STATUS, ATA_HD_CONTROL
};


    /*
     *  Probe for a Falcon IDE interface
     */

int falconide_probe_hwif(int index, ide_hwif_t *hwif)
{
    static int falcon_index = 0;

    if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
	return 0;

    if (!falcon_index) {
	printk("ide%d: Falcon IDE interface\n", index);
	falcon_index = index+1;
    }
    if (falcon_index == index+1) {
	ide_setup_ports(hwif, (ide_ioreg_t)ATA_HD_BASE, falconide_offsets, 0,
			NULL);
	hwif->irq = IRQ_MFP_IDE;
	return 1;
    }
    return 0;
}