1 /*
2 * Macintosh IDE Driver
3 *
4 * Copyright (C) 1998 by Michael Schmitz
5 *
6 * This driver was written based on information obtained from the MacOS IDE
7 * driver binary by Mikael Forselius
8 *
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.
12 */
13
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>
21
22 #include <asm/machw.h>
23 #include <asm/macintosh.h>
24 #include <asm/macints.h>
25 #include <asm/mac_baboon.h>
26
27 #define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
28
29 /*
30 * Generic IDE registers as offsets from the base
31 * These match MkLinux so they should be correct.
32 */
33
34 #define IDE_CONTROL 0x38 /* control/altstatus */
35
36 /*
37 * Mac-specific registers
38 */
39
40 /*
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...
44 */
45
46 #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
47 *
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
54 */
55
56 volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
57
58 int macide_ack_intr(ide_hwif_t* hwif)
59 {
60 if (*ide_ifr & 0x20) {
61 *ide_ifr &= ~0x20;
62 return 1;
63 }
64 return 0;
65 }
66
67 static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
68 int irq, ide_ack_intr_t *ack_intr)
69 {
70 int i;
71
72 memset(hw, 0, sizeof(*hw));
73
74 for (i = 0; i < 8; i++)
75 hw->io_ports[i] = base + i * 4;
76
77 hw->io_ports[IDE_CONTROL_OFFSET] = base + IDE_CONTROL;
78
79 hw->irq = irq;
80 hw->ack_intr = ack_intr;
81 }
82
83 static const char *mac_ide_name[] =
84 { "Quadra", "Powerbook", "Powerbook Baboon" };
85
86 /*
87 * Probe for a Macintosh IDE interface
88 */
89
90 static int __init macide_init(void)
91 {
92 ide_hwif_t *hwif;
93 ide_ack_intr_t *ack_intr;
94 unsigned long base;
95 int irq;
96 hw_regs_t hw;
97
98 switch (macintosh_config->ide_type) {
99 case MAC_IDE_QUADRA:
100 base = IDE_BASE;
101 ack_intr = macide_ack_intr;
102 irq = IRQ_NUBUS_F;
103 break;
104 case MAC_IDE_PB:
105 base = IDE_BASE;
106 ack_intr = macide_ack_intr;
107 irq = IRQ_NUBUS_C;
108 break;
109 case MAC_IDE_BABOON:
110 base = BABOON_BASE;
111 ack_intr = NULL;
112 irq = IRQ_BABOON_1;
113 break;
114 default:
115 return -ENODEV;
116 }
117
118 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
119 mac_ide_name[macintosh_config->ide_type - 1]);
120
121 macide_setup_ports(&hw, base, irq, ack_intr);
122
123 hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
124 if (hwif) {
125 u8 index = hwif->index;
126 u8 idx[4] = { index, 0xff, 0xff, 0xff };
127
128 ide_init_port_data(hwif, index);
129 ide_init_port_hw(hwif, &hw);
130
131 hwif->mmio = 1;
132
133 ide_device_add(idx, NULL);
134 }
135
136 return 0;
137 }
138
139 module_init(macide_init);
140
141 MODULE_LICENSE("GPL");
142
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