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 | ||
21 | #include <asm/machw.h> | |
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 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
57 | int macide_ack_intr(ide_hwif_t* hwif) |
58 | { | |
59 | if (*ide_ifr & 0x20) { | |
60 | *ide_ifr &= ~0x20; | |
61 | return 1; | |
62 | } | |
63 | return 0; | |
64 | } | |
65 | ||
29dd5975 BZ |
66 | static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base, |
67 | int irq, ide_ack_intr_t *ack_intr) | |
68 | { | |
69 | int i; | |
70 | ||
71 | memset(hw, 0, sizeof(*hw)); | |
72 | ||
73 | for (i = 0; i < 8; i++) | |
4c3032d8 | 74 | hw->io_ports_array[i] = base + i * 4; |
29dd5975 | 75 | |
4c3032d8 | 76 | hw->io_ports.ctl_addr = base + IDE_CONTROL; |
29dd5975 BZ |
77 | |
78 | hw->irq = irq; | |
79 | hw->ack_intr = ack_intr; | |
d427e836 BZ |
80 | |
81 | hw->chipset = ide_generic; | |
29dd5975 BZ |
82 | } |
83 | ||
c99c92c5 BZ |
84 | static const char *mac_ide_name[] = |
85 | { "Quadra", "Powerbook", "Powerbook Baboon" }; | |
86 | ||
1da177e4 LT |
87 | /* |
88 | * Probe for a Macintosh IDE interface | |
89 | */ | |
90 | ||
ade2daf9 | 91 | static int __init macide_init(void) |
1da177e4 | 92 | { |
29dd5975 BZ |
93 | ide_ack_intr_t *ack_intr; |
94 | unsigned long base; | |
95 | int irq; | |
c97c6aca | 96 | hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; |
1da177e4 | 97 | |
3ce92a2a GU |
98 | if (!MACH_IS_MAC) |
99 | return -ENODEV; | |
100 | ||
1da177e4 LT |
101 | switch (macintosh_config->ide_type) { |
102 | case MAC_IDE_QUADRA: | |
29dd5975 BZ |
103 | base = IDE_BASE; |
104 | ack_intr = macide_ack_intr; | |
105 | irq = IRQ_NUBUS_F; | |
1da177e4 LT |
106 | break; |
107 | case MAC_IDE_PB: | |
29dd5975 BZ |
108 | base = IDE_BASE; |
109 | ack_intr = macide_ack_intr; | |
110 | irq = IRQ_NUBUS_C; | |
1da177e4 LT |
111 | break; |
112 | case MAC_IDE_BABOON: | |
29dd5975 BZ |
113 | base = BABOON_BASE; |
114 | ack_intr = NULL; | |
115 | irq = IRQ_BABOON_1; | |
cbb010c1 BZ |
116 | break; |
117 | default: | |
ade2daf9 | 118 | return -ENODEV; |
cbb010c1 | 119 | } |
1da177e4 | 120 | |
c99c92c5 BZ |
121 | printk(KERN_INFO "ide: Macintosh %s IDE controller\n", |
122 | mac_ide_name[macintosh_config->ide_type - 1]); | |
123 | ||
29dd5975 BZ |
124 | macide_setup_ports(&hw, base, irq, ack_intr); |
125 | ||
6f904d01 | 126 | return ide_host_add(NULL, hws, NULL); |
1da177e4 | 127 | } |
ade2daf9 BZ |
128 | |
129 | module_init(macide_init); | |
37c807a2 AB |
130 | |
131 | MODULE_LICENSE("GPL"); |