linux-imx

/*

 *  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/module.h>

#include <linux/types.h>

#include <linux/mm.h>

#include <linux/interrupt.h>

#include <linux/blkdev.h>

#include <linux/ide.h>

#include <linux/init.h>

​

#include <asm/setup.h>

#include <asm/atarihw.h>

#include <asm/atariints.h>

#include <asm/atari_stdma.h>

#include <asm/ide.h>

​

#define DRV_NAME "falconide"

​

    /*

     *  Base of the IDE interface

     */

​

#define ATA_HD_BASE 0xfff00000

​

    /*

     *  Offsets from the above base

     */

​

#define ATA_HD_CONTROL  0x39

​

    /*

     *  falconide_intr_lock is used to obtain access to the IDE interrupt,

     *  which is shared between several drivers.

     */

​

static int falconide_intr_lock;

​

static void falconide_release_lock(void)

{

    if (falconide_intr_lock == 0) {

        printk(KERN_ERR "%s: bug\n", __func__);

        return;

    }

    falconide_intr_lock = 0;

    stdma_release();

}

​

static void falconide_get_lock(irq_handler_t handler, void *data)

{

    if (falconide_intr_lock == 0) {

        if (in_interrupt() > 0)

            panic("Falcon IDE hasn't ST-DMA lock in interrupt");

        stdma_lock(handler, data);

        falconide_intr_lock = 1;

    }