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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 | |
56 | int macide_test_irq(ide_hwif_t *hwif) |
57 | { |
58 | if (*ide_ifr & 0x20) |
59 | return 1; |
60 | return 0; |
61 | } |
62 | |
63 | static void macide_clear_irq(ide_drive_t *drive) |
64 | { |
65 | *ide_ifr &= ~0x20; |
66 | } |
67 | |
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 | |
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 |
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