153 строки
3.2 KiB
C
153 строки
3.2 KiB
C
/*
|
|
* 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>
|
|
|
|
#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);
|
|
}
|
|
|
|
/* Atari has a byte-swapped IDE interface */
|
|
static const struct ide_tp_ops falconide_tp_ops = {
|
|
.exec_command = ide_exec_command,
|
|
.read_status = ide_read_status,
|
|
.read_altstatus = ide_read_altstatus,
|
|
|
|
.set_irq = ide_set_irq,
|
|
|
|
.tf_load = ide_tf_load,
|
|
.tf_read = ide_tf_read,
|
|
|
|
.input_data = falconide_input_data,
|
|
.output_data = falconide_output_data,
|
|
};
|
|
|
|
static const struct ide_port_info falconide_port_info = {
|
|
.tp_ops = &falconide_tp_ops,
|
|
.host_flags = IDE_HFLAG_NO_DMA,
|
|
};
|
|
|
|
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)
|
|
{
|
|
struct ide_host *host;
|
|
hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
|
|
int rc;
|
|
|
|
if (!MACH_IS_ATARI || !ATARIHW_PRESENT(IDE))
|
|
return -ENODEV;
|
|
|
|
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);
|
|
|
|
host = ide_host_alloc(&falconide_port_info, hws);
|
|
if (host == NULL) {
|
|
rc = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
ide_get_lock(NULL, NULL);
|
|
rc = ide_host_register(host, &falconide_port_info, hws);
|
|
ide_release_lock();
|
|
|
|
if (rc)
|
|
goto err_free;
|
|
|
|
return 0;
|
|
err_free:
|
|
ide_host_free(host);
|
|
err:
|
|
release_mem_region(ATA_HD_BASE, 0x40);
|
|
return rc;
|
|
}
|
|
|
|
module_init(falconide_init);
|
|
|
|
MODULE_LICENSE("GPL");
|