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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/legacy/macide.c -- 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 | ||
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 | ||
34 | #define IDE_DATA 0x00 | |
35 | #define IDE_ERROR 0x04 /* see err-bits */ | |
36 | #define IDE_NSECTOR 0x08 /* nr of sectors to read/write */ | |
37 | #define IDE_SECTOR 0x0c /* starting sector */ | |
38 | #define IDE_LCYL 0x10 /* starting cylinder */ | |
39 | #define IDE_HCYL 0x14 /* high byte of starting cyl */ | |
40 | #define IDE_SELECT 0x18 /* 101dhhhh , d=drive, hhhh=head */ | |
41 | #define IDE_STATUS 0x1c /* see status-bits */ | |
42 | #define IDE_CONTROL 0x38 /* control/altstatus */ | |
43 | ||
44 | /* | |
45 | * Mac-specific registers | |
46 | */ | |
47 | ||
48 | /* | |
49 | * this register is odd; it doesn't seem to do much and it's | |
50 | * not word-aligned like virtually every other hardware register | |
51 | * on the Mac... | |
52 | */ | |
53 | ||
54 | #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra: | |
55 | * | |
56 | * Bit 0+1: some interrupt flags | |
57 | * Bit 2+3: some interrupt enable | |
58 | * Bit 4: ?? | |
59 | * Bit 5: IDE interrupt flag (any hwif) | |
60 | * Bit 6: maybe IDE interrupt enable (any hwif) ?? | |
61 | * Bit 7: Any interrupt condition | |
62 | */ | |
63 | ||
64 | volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); | |
65 | ||
66 | static int macide_offsets[IDE_NR_PORTS] = { | |
67 | IDE_DATA, IDE_ERROR, IDE_NSECTOR, IDE_SECTOR, IDE_LCYL, | |
68 | IDE_HCYL, IDE_SELECT, IDE_STATUS, IDE_CONTROL | |
69 | }; | |
70 | ||
71 | int macide_ack_intr(ide_hwif_t* hwif) | |
72 | { | |
73 | if (*ide_ifr & 0x20) { | |
74 | *ide_ifr &= ~0x20; | |
75 | return 1; | |
76 | } | |
77 | return 0; | |
78 | } | |
79 | ||
c99c92c5 BZ |
80 | static const char *mac_ide_name[] = |
81 | { "Quadra", "Powerbook", "Powerbook Baboon" }; | |
82 | ||
1da177e4 LT |
83 | /* |
84 | * Probe for a Macintosh IDE interface | |
85 | */ | |
86 | ||
ade2daf9 | 87 | static int __init macide_init(void) |
1da177e4 LT |
88 | { |
89 | hw_regs_t hw; | |
90 | ide_hwif_t *hwif; | |
1da177e4 LT |
91 | |
92 | switch (macintosh_config->ide_type) { | |
93 | case MAC_IDE_QUADRA: | |
94 | ide_setup_ports(&hw, IDE_BASE, macide_offsets, | |
95 | 0, 0, macide_ack_intr, | |
96 | // quadra_ide_iops, | |
97 | IRQ_NUBUS_F); | |
1da177e4 LT |
98 | break; |
99 | case MAC_IDE_PB: | |
100 | ide_setup_ports(&hw, IDE_BASE, macide_offsets, | |
101 | 0, 0, macide_ack_intr, | |
102 | // macide_pb_iops, | |
103 | IRQ_NUBUS_C); | |
1da177e4 LT |
104 | break; |
105 | case MAC_IDE_BABOON: | |
106 | ide_setup_ports(&hw, BABOON_BASE, macide_offsets, | |
107 | 0, 0, NULL, | |
108 | // macide_baboon_iops, | |
109 | IRQ_BABOON_1); | |
cbb010c1 BZ |
110 | break; |
111 | default: | |
ade2daf9 | 112 | return -ENODEV; |
cbb010c1 | 113 | } |
1da177e4 | 114 | |
c99c92c5 BZ |
115 | printk(KERN_INFO "ide: Macintosh %s IDE controller\n", |
116 | mac_ide_name[macintosh_config->ide_type - 1]); | |
117 | ||
cbb010c1 BZ |
118 | hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]); |
119 | if (hwif) { | |
120 | u8 index = hwif->index; | |
8ac4ce74 | 121 | u8 idx[4] = { index, 0xff, 0xff, 0xff }; |
cbb010c1 BZ |
122 | |
123 | ide_init_port_data(hwif, index); | |
124 | ide_init_port_hw(hwif, &hw); | |
125 | ||
126 | if (macintosh_config->ide_type == MAC_IDE_BABOON && | |
127 | macintosh_config->ident == MAC_MODEL_PB190) { | |
1da177e4 LT |
128 | /* Fix breakage in ide-disk.c: drive capacity */ |
129 | /* is not initialized for drives without a */ | |
130 | /* hardware ID, and we can't get that without */ | |
131 | /* probing the drive which freezes a 190. */ | |
cbb010c1 | 132 | ide_drive_t *drive = &hwif->drives[0]; |
1da177e4 | 133 | drive->capacity64 = drive->cyl*drive->head*drive->sect; |
1da177e4 | 134 | } |
1da177e4 | 135 | |
2ad1e558 | 136 | hwif->mmio = 1; |
8ac4ce74 BZ |
137 | |
138 | ide_device_add(idx); | |
1da177e4 | 139 | } |
ade2daf9 BZ |
140 | |
141 | return 0; | |
1da177e4 | 142 | } |
ade2daf9 BZ |
143 | |
144 | module_init(macide_init); |