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/*
* linux/drivers/ide/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/config.h>
#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;
}
#ifdef CONFIG_BLK_DEV_MAC_MEDIABAY
static void macide_mediabay_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
int state = baboon->mb_status & 0x04;
printk("macide: media bay %s detected\n", state? "removal":"insertion");
}
#endif
/*
* Probe for a Macintosh IDE interface
*/
void macide_init(void)
{
hw_regs_t hw;
int index = -1;
switch (macintosh_config->ide_type) {
case MAC_IDE_QUADRA:
ide_setup_ports(&hw, (ide_ioreg_t)IDE_BASE, macide_offsets,
0, 0, macide_ack_intr, IRQ_NUBUS_F);
index = ide_register_hw(&hw, NULL);
break;
case MAC_IDE_PB:
ide_setup_ports(&hw, (ide_ioreg_t)IDE_BASE, macide_offsets,
0, 0, macide_ack_intr, IRQ_NUBUS_C);
index = ide_register_hw(&hw, NULL);
break;
case MAC_IDE_BABOON:
ide_setup_ports(&hw, (ide_ioreg_t)BABOON_BASE, macide_offsets,
0, 0, NULL, IRQ_BABOON_1);
index = ide_register_hw(&hw, NULL);
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 cna't get that without */
/* probing the drive which freezes a 190. */
ide_drive_t *drive = &ide_hwifs[index].drives[0];
drive->capacity = drive->cyl*drive->head*drive->sect;
#ifdef CONFIG_BLK_DEV_MAC_MEDIABAY
request_irq(IRQ_BABOON_2, macide_mediabay_interrupt,
IRQ_FLG_FAST, "mediabay",
macide_mediabay_interrupt);
#endif
}
break;
default:
return;
}
if (index != -1) {
if (macintosh_config->ide_type == MAC_IDE_QUADRA)
printk("ide%d: Macintosh Quadra IDE interface\n", index);
else if (macintosh_config->ide_type == MAC_IDE_PB)
printk("ide%d: Macintosh Powerbook IDE interface\n", index);
else if (macintosh_config->ide_type == MAC_IDE_BABOON)
printk("ide%d: Macintosh Powerbook Baboon IDE interface\n", index);
else
printk("ide%d: Unknown Macintosh IDE interface\n", index);
}
}
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