f50f9d8867
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
|
|
* linux/drivers/ide/legacy/macide.c -- 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/hdreg.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/ide.h>
|
|
|
|
#include <asm/machw.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_DATA 0x00
|
|
#define IDE_ERROR 0x04 /* see err-bits */
|
|
#define IDE_NSECTOR 0x08 /* nr of sectors to read/write */
|
|
#define IDE_SECTOR 0x0c /* starting sector */
|
|
#define IDE_LCYL 0x10 /* starting cylinder */
|
|
#define IDE_HCYL 0x14 /* high byte of starting cyl */
|
|
#define IDE_SELECT 0x18 /* 101dhhhh , d=drive, hhhh=head */
|
|
#define IDE_STATUS 0x1c /* see status-bits */
|
|
#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);
|
|
|
|
static int macide_offsets[IDE_NR_PORTS] = {
|
|
IDE_DATA, IDE_ERROR, IDE_NSECTOR, IDE_SECTOR, IDE_LCYL,
|
|
IDE_HCYL, IDE_SELECT, IDE_STATUS, IDE_CONTROL
|
|
};
|
|
|
|
int macide_ack_intr(ide_hwif_t* hwif)
|
|
{
|
|
if (*ide_ifr & 0x20) {
|
|
*ide_ifr &= ~0x20;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Probe for a Macintosh IDE interface
|
|
*/
|
|
|
|
void macide_init(void)
|
|
{
|
|
hw_regs_t hw;
|
|
ide_hwif_t *hwif;
|
|
int index = -1;
|
|
|
|
switch (macintosh_config->ide_type) {
|
|
case MAC_IDE_QUADRA:
|
|
ide_setup_ports(&hw, IDE_BASE, macide_offsets,
|
|
0, 0, macide_ack_intr,
|
|
// quadra_ide_iops,
|
|
IRQ_NUBUS_F);
|
|
index = ide_register_hw(&hw, 1, &hwif);
|
|
break;
|
|
case MAC_IDE_PB:
|
|
ide_setup_ports(&hw, IDE_BASE, macide_offsets,
|
|
0, 0, macide_ack_intr,
|
|
// macide_pb_iops,
|
|
IRQ_NUBUS_C);
|
|
index = ide_register_hw(&hw, 1, &hwif);
|
|
break;
|
|
case MAC_IDE_BABOON:
|
|
ide_setup_ports(&hw, BABOON_BASE, macide_offsets,
|
|
0, 0, NULL,
|
|
// macide_baboon_iops,
|
|
IRQ_BABOON_1);
|
|
index = ide_register_hw(&hw, 1, &hwif);
|
|
if (index == -1) break;
|
|
if (macintosh_config->ident == MAC_MODEL_PB190) {
|
|
|
|
/* Fix breakage in ide-disk.c: drive capacity */
|
|
/* is not initialized for drives without a */
|
|
/* hardware ID, and we can't get that without */
|
|
/* probing the drive which freezes a 190. */
|
|
|
|
ide_drive_t *drive = &ide_hwifs[index].drives[0];
|
|
drive->capacity64 = drive->cyl*drive->head*drive->sect;
|
|
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return;
|
|
}
|
|
|
|
if (index != -1) {
|
|
hwif->mmio = 1;
|
|
if (macintosh_config->ide_type == MAC_IDE_QUADRA)
|
|
printk(KERN_INFO "ide%d: Macintosh Quadra IDE interface\n", index);
|
|
else if (macintosh_config->ide_type == MAC_IDE_PB)
|
|
printk(KERN_INFO "ide%d: Macintosh Powerbook IDE interface\n", index);
|
|
else if (macintosh_config->ide_type == MAC_IDE_BABOON)
|
|
printk(KERN_INFO "ide%d: Macintosh Powerbook Baboon IDE interface\n", index);
|
|
else
|
|
printk(KERN_INFO "ide%d: Unknown Macintosh IDE interface\n", index);
|
|
}
|
|
}
|