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/*
* 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/hdreg.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>
#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.
*/
int falconide_intr_lock;
EXPORT_SYMBOL(falconide_intr_lock);
static void falconide_input_data(ide_drive_t *drive, struct request *rq,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;
if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
return insw(data_addr, buf, (len + 1) / 2);
insw_swapw(data_addr, buf, (len + 1) / 2);
}
static void falconide_output_data(ide_drive_t *drive, struct request *rq,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;
if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
return outsw(data_addr, buf, (len + 1) / 2);
outsw_swapw(data_addr, buf, (len + 1) / 2);
}
static void __init falconide_setup_ports(hw_regs_t *hw)
{
int i;
memset(hw, 0, sizeof(*hw));
hw->io_ports.data_addr = ATA_HD_BASE;
for (i = 1; i < 8; i++)
hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
hw->irq = IRQ_MFP_IDE;
hw->ack_intr = NULL;
hw->chipset = ide_generic;
}
/*
* Probe for a Falcon IDE interface
*/
static int __init falconide_init(void)
{
ide_hwif_t *hwif;
hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
return 0;
printk(KERN_INFO "ide: Falcon IDE controller\n");
if (!request_mem_region(ATA_HD_BASE, 0x40, DRV_NAME)) {
printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
return -EBUSY;
}
falconide_setup_ports(&hw);
hwif = ide_find_port();
if (hwif) {
u8 index = hwif->index;
u8 idx[4] = { index, 0xff, 0xff, 0xff };
/* Atari has a byte-swapped IDE interface */
hwif->input_data = falconide_input_data;
hwif->output_data = falconide_output_data;
ide_get_lock(NULL, NULL);
ide_device_add(idx, NULL, hws);
ide_release_lock();
}
return 0;
}
module_init(falconide_init);
MODULE_LICENSE("GPL");
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