Linux 2.6.26-rc5
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / ide / legacy / macide.c
blobcaa2632dd08e1f96d5e5e4379b23ea9ea8cc3563
1 /*
2 * Macintosh IDE Driver
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
11 * more details.
14 #include <linux/types.h>
15 #include <linux/mm.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
43 * on the Mac...
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
50 * Bit 4: ??
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) {
61 *ide_ifr &= ~0x20;
62 return 1;
64 return 0;
67 static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
68 int irq, ide_ack_intr_t *ack_intr)
70 int i;
72 memset(hw, 0, sizeof(*hw));
74 for (i = 0; i < 8; i++)
75 hw->io_ports_array[i] = base + i * 4;
77 hw->io_ports.ctl_addr = base + IDE_CONTROL;
79 hw->irq = irq;
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)
92 ide_hwif_t *hwif;
93 ide_ack_intr_t *ack_intr;
94 unsigned long base;
95 int irq;
96 hw_regs_t hw;
98 if (!MACH_IS_MAC)
99 return -ENODEV;
101 switch (macintosh_config->ide_type) {
102 case MAC_IDE_QUADRA:
103 base = IDE_BASE;
104 ack_intr = macide_ack_intr;
105 irq = IRQ_NUBUS_F;
106 break;
107 case MAC_IDE_PB:
108 base = IDE_BASE;
109 ack_intr = macide_ack_intr;
110 irq = IRQ_NUBUS_C;
111 break;
112 case MAC_IDE_BABOON:
113 base = BABOON_BASE;
114 ack_intr = NULL;
115 irq = IRQ_BABOON_1;
116 break;
117 default:
118 return -ENODEV;
121 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
122 mac_ide_name[macintosh_config->ide_type - 1]);
124 macide_setup_ports(&hw, base, irq, ack_intr);
126 hwif = ide_find_port();
127 if (hwif) {
128 u8 index = hwif->index;
129 u8 idx[4] = { index, 0xff, 0xff, 0xff };
131 ide_init_port_data(hwif, index);
132 ide_init_port_hw(hwif, &hw);
134 ide_device_add(idx, NULL);
137 return 0;
140 module_init(macide_init);
142 MODULE_LICENSE("GPL");