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 #include <linux/module.h>
21
22 #include <asm/macintosh.h>
23 #include <asm/macints.h>
24 #include <asm/mac_baboon.h>
25
26 #define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
27
28 /*
29 * Generic IDE registers as offsets from the base
30 * These match MkLinux so they should be correct.
31 */
32
33 #define IDE_CONTROL 0x38 /* control/altstatus */
34
35 /*
36 * Mac-specific registers
37 */
38
39 /*
40 * this register is odd; it doesn't seem to do much and it's
41 * not word-aligned like virtually every other hardware register
42 * on the Mac...
43 */
44
45 #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
46 *
47 * Bit 0+1: some interrupt flags
48 * Bit 2+3: some interrupt enable
49 * Bit 4: ??
50 * Bit 5: IDE interrupt flag (any hwif)
51 * Bit 6: maybe IDE interrupt enable (any hwif) ??
52 * Bit 7: Any interrupt condition
53 */
54
55 volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
56
macide_test_irq(ide_hwif_t * hwif)57 int macide_test_irq(ide_hwif_t *hwif)
58 {
59 if (*ide_ifr & 0x20)
60 return 1;
61 return 0;
62 }
63
macide_clear_irq(ide_drive_t * drive)64 static void macide_clear_irq(ide_drive_t *drive)
65 {
66 *ide_ifr &= ~0x20;
67 }
68
macide_setup_ports(struct ide_hw * hw,unsigned long base,int irq)69 static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base,
70 int irq)
71 {
72 int i;
73
74 memset(hw, 0, sizeof(*hw));
75
76 for (i = 0; i < 8; i++)
77 hw->io_ports_array[i] = base + i * 4;
78
79 hw->io_ports.ctl_addr = base + IDE_CONTROL;
80
81 hw->irq = irq;
82 }
83
84 static const struct ide_port_ops macide_port_ops = {
85 .clear_irq = macide_clear_irq,
86 .test_irq = macide_test_irq,
87 };
88
89 static const struct ide_port_info macide_port_info = {
90 .port_ops = &macide_port_ops,
91 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
92 .irq_flags = IRQF_SHARED,
93 .chipset = ide_generic,
94 };
95
96 static const char *mac_ide_name[] =
97 { "Quadra", "Powerbook", "Powerbook Baboon" };
98
99 /*
100 * Probe for a Macintosh IDE interface
101 */
102
macide_init(void)103 static int __init macide_init(void)
104 {
105 unsigned long base;
106 int irq;
107 struct ide_hw hw, *hws[] = { &hw };
108 struct ide_port_info d = macide_port_info;
109
110 if (!MACH_IS_MAC)
111 return -ENODEV;
112
113 switch (macintosh_config->ide_type) {
114 case MAC_IDE_QUADRA:
115 base = IDE_BASE;
116 irq = IRQ_NUBUS_F;
117 break;
118 case MAC_IDE_PB:
119 base = IDE_BASE;
120 irq = IRQ_NUBUS_C;
121 break;
122 case MAC_IDE_BABOON:
123 base = BABOON_BASE;
124 d.port_ops = NULL;
125 irq = IRQ_BABOON_1;
126 break;
127 default:
128 return -ENODEV;
129 }
130
131 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
132 mac_ide_name[macintosh_config->ide_type - 1]);
133
134 macide_setup_ports(&hw, base, irq);
135
136 return ide_host_add(&d, hws, 1, NULL);
137 }
138
139 module_init(macide_init);
140
141 MODULE_LICENSE("GPL");
142