131 lines
2.7 KiB
C
131 lines
2.7 KiB
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/delay.h>
|
|
#include <linux/ide.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_array[i] = base + i * 4;
|
|
|
|
hw->io_ports.ctl_addr = base + IDE_CONTROL;
|
|
|
|
hw->irq = irq;
|
|
hw->ack_intr = ack_intr;
|
|
|
|
hw->chipset = ide_generic;
|
|
}
|
|
|
|
static const char *mac_ide_name[] =
|
|
{ "Quadra", "Powerbook", "Powerbook Baboon" };
|
|
|
|
/*
|
|
* Probe for a Macintosh IDE interface
|
|
*/
|
|
|
|
static int __init macide_init(void)
|
|
{
|
|
ide_ack_intr_t *ack_intr;
|
|
unsigned long base;
|
|
int irq;
|
|
hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
|
|
|
|
if (!MACH_IS_MAC)
|
|
return -ENODEV;
|
|
|
|
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);
|
|
|
|
return ide_host_add(NULL, hws, NULL);
|
|
}
|
|
|
|
module_init(macide_init);
|
|
|
|
MODULE_LICENSE("GPL");
|