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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 | #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 | |
57 | int macide_test_irq(ide_hwif_t *hwif) |
58 | { |
59 | if (*ide_ifr & 0x20) |
60 | return 1; |
61 | return 0; |
62 | } |
63 | |
64 | static void macide_clear_irq(ide_drive_t *drive) |
65 | { |
66 | *ide_ifr &= ~0x20; |
67 | } |
68 | |
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 | |
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 |
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