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/*

 *  linux/drivers/block/qd6580.c       Version 0.02  Feb 09, 1996

 *

 *  Copyright (C) 1996  Linus Torvalds & author (see below)

 */

/*

 * QDI QD6580 EIDE controller fast support by Colten Edwards.

 * No net access, but (maybe) can be reached at pje120@cs.usask.ca

 */

#undef REALLY_SLOW_IO           /* most systems can safely undef this */

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/timer.h>

#include <linux/mm.h>

#include <linux/ioport.h>

#include <linux/blkdev.h>

#include <linux/hdreg.h>

#include <asm/io.h>

#include "ide.h"

#include "ide_modes.h"

/*

 * Register 0xb3 looks like:

 *      0x4f is fast            mode3 ?

 *      0x3f is medium          mode2 ?

 *      0x2f is slower          mode1 ?

 *      0x1f is slower yet      mode0 ?

 *      0x0f ???                ???

 *

 * Don't know whether this sets BOTH drives, or just the first drive.

 * Don't know if there is a separate setting for the second drive.

 *

 * Feel free to patch this if you have one of these beasts

 * and can work out the answers!

 *

 * I/O ports are 0xb0 0xb2 and 0xb3

 *

 * More research on qd6580 being done by willmore@cig.mot.com (David)

 *      -- this is apparently a *dual* IDE interface

 */

static void tune_qd6580 (ide_drive_t *drive, byte pio)

{

        unsigned long flags;

        pio = ide_get_best_pio_mode(drive, pio, 3, NULL);

        save_flags(flags);

        cli();

        outb_p(0x8d,0xb0);

        outb_p(0x0 ,0xb2);

        outb_p(((pio+1)<<4)|0x0f,0xb3);

        inb(0x3f6);

        restore_flags(flags);

}

void init_qd6580 (void)

{

        ide_hwifs[0].chipset = ide_qd6580;

        ide_hwifs[1].chipset = ide_qd6580;

        ide_hwifs[0].tuneproc = &tune_qd6580;

}