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/delay.h>
19 #include <linux/ide.h>
20
21 #include <asm/macintosh.h>
22 #include <asm/macints.h>
23 #include <asm/mac_baboon.h>
24
25 #define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
26
27 /*
28 * Generic IDE registers as offsets from the base
29 * These match MkLinux so they should be correct.
30 */
31
32 #define IDE_CONTROL 0x38 /* control/altstatus */
33
34 /*
35 * Mac-specific registers
36 */
37
38 /*
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
41 * on the Mac...
42 */
43
44 #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
45 *
46 * Bit 0+1: some interrupt flags
47 * Bit 2+3: some interrupt enable
48 * Bit 4: ??
49 * Bit 5: IDE interrupt flag (any hwif)
50 * Bit 6: maybe IDE interrupt enable (any hwif) ??
51 * Bit 7: Any interrupt condition
52 */
53
54 volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
55
macide_test_irq(ide_hwif_t * hwif)56 int macide_test_irq(ide_hwif_t *hwif)
57 {
58 if (*ide_ifr & 0x20)
59 return 1;
60 return 0;
61 }
62
macide_clear_irq(ide_drive_t * drive)63 static void macide_clear_irq(ide_drive_t *drive)
64 {
65 *ide_ifr &= ~0x20;
66 }
67
macide_setup_ports(struct ide_hw * hw,unsigned long base,int irq)68 static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base,
69 int irq)
70 {
71 int i;
72
73 memset(hw, 0, sizeof(*hw));
74
75 for (i = 0; i < 8; i++)
76 hw->io_ports_array[i] = base + i * 4;
77
78 hw->io_ports.ctl_addr = base + IDE_CONTROL;
79
80 hw->irq = irq;
81 }
82
83 static const struct ide_port_ops macide_port_ops = {
84 .clear_irq = macide_clear_irq,
85 .test_irq = macide_test_irq,
86 };
87
88 static const struct ide_port_info macide_port_info = {
89 .port_ops = &macide_port_ops,
90 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
91 .irq_flags = IRQF_SHARED,
92 .chipset = ide_generic,
93 };
94
95 static const char *mac_ide_name[] =
96 { "Quadra", "Powerbook", "Powerbook Baboon" };
97
98 /*
99 * Probe for a Macintosh IDE interface
100 */
101
macide_init(void)102 static int __init macide_init(void)
103 {
104 unsigned long base;
105 int irq;
106 struct ide_hw hw, *hws[] = { &hw };
107 struct ide_port_info d = macide_port_info;
108
109 if (!MACH_IS_MAC)
110 return -ENODEV;
111
112 switch (macintosh_config->ide_type) {
113 case MAC_IDE_QUADRA:
114 base = IDE_BASE;
115 irq = IRQ_NUBUS_F;
116 break;
117 case MAC_IDE_PB:
118 base = IDE_BASE;
119 irq = IRQ_NUBUS_C;
120 break;
121 case MAC_IDE_BABOON:
122 base = BABOON_BASE;
123 d.port_ops = NULL;
124 irq = IRQ_BABOON_1;
125 break;
126 default:
127 return -ENODEV;
128 }
129
130 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
131 mac_ide_name[macintosh_config->ide_type - 1]);
132
133 macide_setup_ports(&hw, base, irq);
134
135 return ide_host_add(&d, hws, 1, NULL);
136 }
137
138 module_init(macide_init);
139
140 MODULE_LICENSE("GPL");
141