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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;
ide_hwifs[0].mate = &ide_hwifs[1];
ide_hwifs[1].mate = &ide_hwifs[0];
}
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