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/hdreg.h>
19 #include <linux/delay.h>
20 #include <linux/ide.h>
22 #include <asm/machw.h>
23 #include <asm/macintosh.h>
24 #include <asm/macints.h>
25 #include <asm/mac_baboon.h>
27 #define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
30 * Generic IDE registers as offsets from the base
31 * These match MkLinux so they should be correct.
34 #define IDE_CONTROL 0x38 /* control/altstatus */
37 * Mac-specific registers
41 * this register is odd; it doesn't seem to do much and it's
42 * not word-aligned like virtually every other hardware register
46 #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
48 * Bit 0+1: some interrupt flags
49 * Bit 2+3: some interrupt enable
51 * Bit 5: IDE interrupt flag (any hwif)
52 * Bit 6: maybe IDE interrupt enable (any hwif) ??
53 * Bit 7: Any interrupt condition
56 volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
58 int macide_ack_intr(ide_hwif_t* hwif)
60 if (*ide_ifr & 0x20) {
67 static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
68 int irq, ide_ack_intr_t *ack_intr)
72 memset(hw, 0, sizeof(*hw));
74 for (i = 0; i < 8; i++)
75 hw->io_ports[i] = base + i * 4;
77 hw->io_ports[IDE_CONTROL_OFFSET] = base + IDE_CONTROL;
80 hw->ack_intr = ack_intr;
83 static const char *mac_ide_name[] =
84 { "Quadra", "Powerbook", "Powerbook Baboon" };
87 * Probe for a Macintosh IDE interface
90 static int __init macide_init(void)
93 ide_ack_intr_t *ack_intr;
98 switch (macintosh_config->ide_type) {
101 ack_intr = macide_ack_intr;
106 ack_intr = macide_ack_intr;
118 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
119 mac_ide_name[macintosh_config->ide_type - 1]);
121 macide_setup_ports(&hw, base, irq, ack_intr);
123 hwif = ide_find_port();
125 u8 index = hwif->index;
126 u8 idx[4] = { index, 0xff, 0xff, 0xff };
128 ide_init_port_data(hwif, index);
129 ide_init_port_hw(hwif, &hw);
133 ide_device_add(idx, NULL);
139 module_init(macide_init);
141 MODULE_LICENSE("GPL");