4 * Copyright (C) 1998 by Michael Schmitz
6 * This driver was written based on information obtained from the MacOS IDE
7 * driver binary by Mikael Forselius
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive for
14 #include <linux/types.h>
16 #include <linux/interrupt.h>
17 #include <linux/blkdev.h>
18 #include <linux/delay.h>
19 #include <linux/ide.h>
21 #include <asm/macintosh.h>
22 #include <asm/macints.h>
23 #include <asm/mac_baboon.h>
25 #define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
28 * Generic IDE registers as offsets from the base
29 * These match MkLinux so they should be correct.
32 #define IDE_CONTROL 0x38 /* control/altstatus */
35 * Mac-specific registers
39 * this register is odd; it doesn't seem to do much and it's
40 * not word-aligned like virtually every other hardware register
44 #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
46 * Bit 0+1: some interrupt flags
47 * Bit 2+3: some interrupt enable
49 * Bit 5: IDE interrupt flag (any hwif)
50 * Bit 6: maybe IDE interrupt enable (any hwif) ??
51 * Bit 7: Any interrupt condition
54 volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
56 int macide_ack_intr(ide_hwif_t* hwif)
58 if (*ide_ifr & 0x20) {
65 static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
66 int irq, ide_ack_intr_t *ack_intr)
70 memset(hw, 0, sizeof(*hw));
72 for (i = 0; i < 8; i++)
73 hw->io_ports_array[i] = base + i * 4;
75 hw->io_ports.ctl_addr = base + IDE_CONTROL;
78 hw->ack_intr = ack_intr;
80 hw->chipset = ide_generic;
83 static const struct ide_port_info macide_port_info = {
84 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
85 .irq_flags = IRQF_SHARED,
88 static const char *mac_ide_name[] =
89 { "Quadra", "Powerbook", "Powerbook Baboon" };
92 * Probe for a Macintosh IDE interface
95 static int __init macide_init(void)
97 ide_ack_intr_t *ack_intr;
100 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
105 switch (macintosh_config->ide_type) {
108 ack_intr = macide_ack_intr;
113 ack_intr = macide_ack_intr;
125 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
126 mac_ide_name[macintosh_config->ide_type - 1]);
128 macide_setup_ports(&hw, base, irq, ack_intr);
130 return ide_host_add(&macide_port_info, hws, NULL);
133 module_init(macide_init);
135 MODULE_LICENSE("GPL");