Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
58f189fc | 2 | * Macintosh IDE Driver |
1da177e4 LT |
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 | ||
1da177e4 LT |
14 | #include <linux/types.h> |
15 | #include <linux/mm.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/blkdev.h> | |
1da177e4 LT |
18 | #include <linux/delay.h> |
19 | #include <linux/ide.h> | |
20 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
f4d3ffa5 | 56 | int macide_test_irq(ide_hwif_t *hwif) |
1da177e4 | 57 | { |
eba8999c | 58 | if (*ide_ifr & 0x20) |
1da177e4 | 59 | return 1; |
1da177e4 LT |
60 | return 0; |
61 | } | |
62 | ||
eba8999c SS |
63 | static void macide_clear_irq(ide_drive_t *drive) |
64 | { | |
65 | *ide_ifr &= ~0x20; | |
66 | } | |
67 | ||
9f36d314 | 68 | static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base, |
f4d3ffa5 | 69 | int irq) |
29dd5975 BZ |
70 | { |
71 | int i; | |
72 | ||
73 | memset(hw, 0, sizeof(*hw)); | |
74 | ||
75 | for (i = 0; i < 8; i++) | |
4c3032d8 | 76 | hw->io_ports_array[i] = base + i * 4; |
29dd5975 | 77 | |
4c3032d8 | 78 | hw->io_ports.ctl_addr = base + IDE_CONTROL; |
29dd5975 BZ |
79 | |
80 | hw->irq = irq; | |
29dd5975 BZ |
81 | } |
82 | ||
eba8999c SS |
83 | static const struct ide_port_ops macide_port_ops = { |
84 | .clear_irq = macide_clear_irq, | |
f4d3ffa5 | 85 | .test_irq = macide_test_irq, |
eba8999c SS |
86 | }; |
87 | ||
211176cc | 88 | static const struct ide_port_info macide_port_info = { |
eba8999c | 89 | .port_ops = &macide_port_ops, |
09a3e791 | 90 | .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, |
255115fb | 91 | .irq_flags = IRQF_SHARED, |
29e52cf7 | 92 | .chipset = ide_generic, |
211176cc BZ |
93 | }; |
94 | ||
c99c92c5 BZ |
95 | static const char *mac_ide_name[] = |
96 | { "Quadra", "Powerbook", "Powerbook Baboon" }; | |
97 | ||
1da177e4 LT |
98 | /* |
99 | * Probe for a Macintosh IDE interface | |
100 | */ | |
101 | ||
ade2daf9 | 102 | static int __init macide_init(void) |
1da177e4 | 103 | { |
29dd5975 BZ |
104 | unsigned long base; |
105 | int irq; | |
9f36d314 | 106 | struct ide_hw hw, *hws[] = { &hw }; |
eba8999c | 107 | struct ide_port_info d = macide_port_info; |
1da177e4 | 108 | |
3ce92a2a GU |
109 | if (!MACH_IS_MAC) |
110 | return -ENODEV; | |
111 | ||
1da177e4 LT |
112 | switch (macintosh_config->ide_type) { |
113 | case MAC_IDE_QUADRA: | |
29dd5975 | 114 | base = IDE_BASE; |
29dd5975 | 115 | irq = IRQ_NUBUS_F; |
1da177e4 LT |
116 | break; |
117 | case MAC_IDE_PB: | |
29dd5975 | 118 | base = IDE_BASE; |
29dd5975 | 119 | irq = IRQ_NUBUS_C; |
1da177e4 LT |
120 | break; |
121 | case MAC_IDE_BABOON: | |
29dd5975 | 122 | base = BABOON_BASE; |
eba8999c | 123 | d.port_ops = NULL; |
29dd5975 | 124 | irq = IRQ_BABOON_1; |
cbb010c1 BZ |
125 | break; |
126 | default: | |
ade2daf9 | 127 | return -ENODEV; |
cbb010c1 | 128 | } |
1da177e4 | 129 | |
c99c92c5 BZ |
130 | printk(KERN_INFO "ide: Macintosh %s IDE controller\n", |
131 | mac_ide_name[macintosh_config->ide_type - 1]); | |
132 | ||
f4d3ffa5 | 133 | macide_setup_ports(&hw, base, irq); |
29dd5975 | 134 | |
eba8999c | 135 | return ide_host_add(&d, hws, 1, NULL); |
1da177e4 | 136 | } |
ade2daf9 BZ |
137 | |
138 | module_init(macide_init); | |
37c807a2 AB |
139 | |
140 | MODULE_LICENSE("GPL"); |