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/*
* 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_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);
int macide_ack_intr(ide_hwif_t* hwif)
{
if (*ide_ifr & 0x20) {
*ide_ifr &= ~0x20;
return 1;
}
return 0;
}
static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
int irq, ide_ack_intr_t *ack_intr)
{
int i;
memset(hw, 0, sizeof(*hw));
for (i = 0; i < 8; i++)
hw->io_ports[i] = base + i * 4;
hw->io_ports[IDE_CONTROL_OFFSET] = IDE_CONTROL;
hw->irq = irq;
hw->ack_intr = ack_intr;
}
static const char *mac_ide_name[] =
{ "Quadra", "Powerbook", "Powerbook Baboon" };
/*
* Probe for a Macintosh IDE interface
*/
static int __init macide_init(void)
{
ide_hwif_t *hwif;
ide_ack_intr_t *ack_intr;
unsigned long base;
int irq;
hw_regs_t hw;
switch (macintosh_config->ide_type) {
case MAC_IDE_QUADRA:
base = IDE_BASE;
ack_intr = macide_ack_intr;
irq = IRQ_NUBUS_F;
break;
case MAC_IDE_PB:
base = IDE_BASE;
ack_intr = macide_ack_intr;
irq = IRQ_NUBUS_C;
break;
case MAC_IDE_BABOON:
base = BABOON_BASE;
ack_intr = NULL;
irq = IRQ_BABOON_1;
break;
default:
return -ENODEV;
}
printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
mac_ide_name[macintosh_config->ide_type - 1]);
macide_setup_ports(&hw, base, irq, ack_intr);
hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
if (hwif) {
u8 index = hwif->index;
u8 idx[4] = { index, 0xff, 0xff, 0xff };
ide_init_port_data(hwif, index);
ide_init_port_hw(hwif, &hw);
hwif->mmio = 1;
ide_device_add(idx, NULL);
}
return 0;
}
module_init(macide_init);
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