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/*
* linux/drivers/ide/gayle.c -- Amiga Gayle IDE Driver
*
* Created 9 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/config.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 <asm/amigahw.h>
#include <asm/amigaints.h>
/*
* Bases of the IDE interfaces
*/
#define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
#define GAYLE_BASE_1200 0xda0000 /* A1200/A600 */
/*
* Offsets from one of the above bases
*/
#define GAYLE_DATA 0x00
#define GAYLE_ERROR 0x06 /* see err-bits */
#define GAYLE_NSECTOR 0x0a /* nr of sectors to read/write */
#define GAYLE_SECTOR 0x0e /* starting sector */
#define GAYLE_LCYL 0x12 /* starting cylinder */
#define GAYLE_HCYL 0x16 /* high byte of starting cyl */
#define GAYLE_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
#define GAYLE_STATUS 0x1e /* see status-bits */
#define GAYLE_CONTROL 0x101a
static int __init gayle_offsets[IDE_NR_PORTS] = {
GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL,
GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1
};
/*
* These are at different offsets from the base
*/
#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
/*
* Offset of the secondary port for IDE doublers
* Note that GAYLE_CONTROL is NOT available then!
*/
#define GAYLE_NEXT_PORT 0x1000
#ifndef CONFIG_BLK_DEV_IDEDOUBLER
#define GAYLE_NUM_HWIFS 1
#define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
#define GAYLE_HAS_CONTROL_REG 1
#else /* CONFIG_BLK_DEV_IDEDOUBLER */
#define GAYLE_NUM_HWIFS 2
#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
GAYLE_NUM_HWIFS-1)
#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
int ide_doubler = 0; /* support IDE doublers? */
#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
/*
* Check and acknowledge the interrupt status
*/
static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
{
unsigned char ch;
ch = inb(hwif->io_ports[IDE_IRQ_OFFSET]);
if (!(ch & 0x80))
return 0;
return 1;
}
static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
{
unsigned char ch;
ch = inb(hwif->io_ports[IDE_IRQ_OFFSET]);
if (!(ch & 0x80))
return 0;
(void)inb(hwif->io_ports[IDE_STATUS_OFFSET]);
outb(0x7c | (ch & 0x03), hwif->io_ports[IDE_IRQ_OFFSET]);
return 1;
}
/*
* Probe for a Gayle IDE interface (and optionally for an IDE doubler)
*/
void __init gayle_init(void)
{
int a4000, i;
if (!MACH_IS_AMIGA)
return;
if (!(a4000 = AMIGAHW_PRESENT(A4000_IDE)) && !AMIGAHW_PRESENT(A1200_IDE))
return;
for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
ide_ioreg_t base, ctrlport, irqport;
ide_ack_intr_t *ack_intr;
hw_regs_t hw;
int index;
if (a4000) {
base = (ide_ioreg_t)ZTWO_VADDR(GAYLE_BASE_4000);
irqport = (ide_ioreg_t)ZTWO_VADDR(GAYLE_IRQ_4000);
ack_intr = gayle_ack_intr_a4000;
} else {
base = (ide_ioreg_t)ZTWO_VADDR(GAYLE_BASE_1200);
irqport = (ide_ioreg_t)ZTWO_VADDR(GAYLE_IRQ_1200);
ack_intr = gayle_ack_intr_a1200;
}
if (GAYLE_HAS_CONTROL_REG)
ctrlport = base + GAYLE_CONTROL;
else
ctrlport = 0;
base += i*GAYLE_NEXT_PORT;
ide_setup_ports(&hw, base, gayle_offsets,
ctrlport, irqport, ack_intr, IRQ_AMIGA_PORTS);
index = ide_register_hw(&hw, NULL);
if (index != -1) {
switch (i) {
case 0:
printk("ide%d: Gayle IDE interface (A%d style)\n", index,
a4000 ? 4000 : 1200);
break;
#ifdef CONFIG_BLK_DEV_IDEDOUBLER
case 1:
printk("ide%d: IDE doubler\n", index);
break;
#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
}
}
#if 1 /* TESTING */
if (i == 1) {
volatile u_short *addr = (u_short *)base;
u_short data;
printk("+++ Probing for IDE doubler... ");
*addr = 0xffff;
data = *addr;
printk("probe returned 0x%02x (PLEASE REPORT THIS!!)\n", data);
}
#endif /* TESTING */
}
}
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