linux-imx

/*

 *  Macintosh IDE Driver

 *

 *     Copyright (C) 1998 by Michael Schmitz

 *

 *  This driver was written based on information obtained from the MacOS IDE

 *  driver binary by Mikael Forselius

 *

 *  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/delay.h>

#include <linux/ide.h>

#include <linux/module.h>

​

#include <asm/macintosh.h>

#include <asm/macints.h>

#include <asm/mac_baboon.h>

​

#define IDE_BASE 0x50F1A000 /* Base address of IDE controller */

​

/*

 * Generic IDE registers as offsets from the base

 * These match MkLinux so they should be correct.

 */

​

#define IDE_CONTROL 0x38    /* control/altstatus */

​

/*

 * Mac-specific registers

 */

​

/*

 * this register is odd; it doesn't seem to do much and it's

 * not word-aligned like virtually every other hardware register

 * on the Mac...

 */

​

#define IDE_IFR     0x101   /* (0x101) IDE interrupt flags on Quadra:

                 *

                 * Bit 0+1: some interrupt flags

                 * Bit 2+3: some interrupt enable

                 * Bit 4:   ??

                 * Bit 5:   IDE interrupt flag (any hwif)

                 * Bit 6:   maybe IDE interrupt enable (any hwif) ??

                 * Bit 7:   Any interrupt condition

                 */

​

volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);

​

int macide_test_irq(ide_hwif_t *hwif)

{

    if (*ide_ifr & 0x20)

        return 1;

    return 0;

}

​