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Commit | Line | Data |
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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> | |
18 | #include <linux/hdreg.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/ide.h> | |
21 | ||
22 | #include <asm/machw.h> | |
23 | #include <asm/macintosh.h> | |
24 | #include <asm/macints.h> | |
25 | #include <asm/mac_baboon.h> | |
26 | ||
27 | #define IDE_BASE 0x50F1A000 /* Base address of IDE controller */ | |
28 | ||
29 | /* | |
30 | * Generic IDE registers as offsets from the base | |
31 | * These match MkLinux so they should be correct. | |
32 | */ | |
33 | ||
1da177e4 LT |
34 | #define IDE_CONTROL 0x38 /* control/altstatus */ |
35 | ||
36 | /* | |
37 | * Mac-specific registers | |
38 | */ | |
39 | ||
40 | /* | |
41 | * this register is odd; it doesn't seem to do much and it's | |
42 | * not word-aligned like virtually every other hardware register | |
43 | * on the Mac... | |
44 | */ | |
45 | ||
46 | #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra: | |
47 | * | |
48 | * Bit 0+1: some interrupt flags | |
49 | * Bit 2+3: some interrupt enable | |
50 | * Bit 4: ?? | |
51 | * Bit 5: IDE interrupt flag (any hwif) | |
52 | * Bit 6: maybe IDE interrupt enable (any hwif) ?? | |
53 | * Bit 7: Any interrupt condition | |
54 | */ | |
55 | ||
56 | volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); | |
57 | ||
1da177e4 LT |
58 | int macide_ack_intr(ide_hwif_t* hwif) |
59 | { | |
60 | if (*ide_ifr & 0x20) { | |
61 | *ide_ifr &= ~0x20; | |
62 | return 1; | |
63 | } | |
64 | return 0; | |
65 | } | |
66 | ||
29dd5975 BZ |
67 | static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base, |
68 | int irq, ide_ack_intr_t *ack_intr) | |
69 | { | |
70 | int i; | |
71 | ||
72 | memset(hw, 0, sizeof(*hw)); | |
73 | ||
74 | for (i = 0; i < 8; i++) | |
75 | hw->io_ports[i] = base + i * 4; | |
76 | ||
899e1bc5 | 77 | hw->io_ports[IDE_CONTROL_OFFSET] = base + IDE_CONTROL; |
29dd5975 BZ |
78 | |
79 | hw->irq = irq; | |
80 | hw->ack_intr = ack_intr; | |
81 | } | |
82 | ||
c99c92c5 BZ |
83 | static const char *mac_ide_name[] = |
84 | { "Quadra", "Powerbook", "Powerbook Baboon" }; | |
85 | ||
1da177e4 LT |
86 | /* |
87 | * Probe for a Macintosh IDE interface | |
88 | */ | |
89 | ||
ade2daf9 | 90 | static int __init macide_init(void) |
1da177e4 | 91 | { |
1da177e4 | 92 | ide_hwif_t *hwif; |
29dd5975 BZ |
93 | ide_ack_intr_t *ack_intr; |
94 | unsigned long base; | |
95 | int irq; | |
96 | hw_regs_t hw; | |
1da177e4 LT |
97 | |
98 | switch (macintosh_config->ide_type) { | |
99 | case MAC_IDE_QUADRA: | |
29dd5975 BZ |
100 | base = IDE_BASE; |
101 | ack_intr = macide_ack_intr; | |
102 | irq = IRQ_NUBUS_F; | |
1da177e4 LT |
103 | break; |
104 | case MAC_IDE_PB: | |
29dd5975 BZ |
105 | base = IDE_BASE; |
106 | ack_intr = macide_ack_intr; | |
107 | irq = IRQ_NUBUS_C; | |
1da177e4 LT |
108 | break; |
109 | case MAC_IDE_BABOON: | |
29dd5975 BZ |
110 | base = BABOON_BASE; |
111 | ack_intr = NULL; | |
112 | irq = IRQ_BABOON_1; | |
cbb010c1 BZ |
113 | break; |
114 | default: | |
ade2daf9 | 115 | return -ENODEV; |
cbb010c1 | 116 | } |
1da177e4 | 117 | |
c99c92c5 BZ |
118 | printk(KERN_INFO "ide: Macintosh %s IDE controller\n", |
119 | mac_ide_name[macintosh_config->ide_type - 1]); | |
120 | ||
29dd5975 BZ |
121 | macide_setup_ports(&hw, base, irq, ack_intr); |
122 | ||
cbb010c1 BZ |
123 | hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]); |
124 | if (hwif) { | |
125 | u8 index = hwif->index; | |
8ac4ce74 | 126 | u8 idx[4] = { index, 0xff, 0xff, 0xff }; |
cbb010c1 BZ |
127 | |
128 | ide_init_port_data(hwif, index); | |
129 | ide_init_port_hw(hwif, &hw); | |
130 | ||
2ad1e558 | 131 | hwif->mmio = 1; |
8ac4ce74 | 132 | |
c413b9b9 | 133 | ide_device_add(idx, NULL); |
1da177e4 | 134 | } |
ade2daf9 BZ |
135 | |
136 | return 0; | |
1da177e4 | 137 | } |
ade2daf9 BZ |
138 | |
139 | module_init(macide_init); |