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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 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/blkdev.h> | |
19 | #include <linux/hdreg.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/ide.h> | |
22 | ||
23 | #include <asm/machw.h> | |
24 | #include <asm/macintosh.h> | |
25 | #include <asm/macints.h> | |
26 | #include <asm/mac_baboon.h> | |
27 | ||
28 | #define IDE_BASE 0x50F1A000 /* Base address of IDE controller */ | |
29 | ||
30 | /* | |
31 | * Generic IDE registers as offsets from the base | |
32 | * These match MkLinux so they should be correct. | |
33 | */ | |
34 | ||
35 | #define IDE_DATA 0x00 | |
36 | #define IDE_ERROR 0x04 /* see err-bits */ | |
37 | #define IDE_NSECTOR 0x08 /* nr of sectors to read/write */ | |
38 | #define IDE_SECTOR 0x0c /* starting sector */ | |
39 | #define IDE_LCYL 0x10 /* starting cylinder */ | |
40 | #define IDE_HCYL 0x14 /* high byte of starting cyl */ | |
41 | #define IDE_SELECT 0x18 /* 101dhhhh , d=drive, hhhh=head */ | |
42 | #define IDE_STATUS 0x1c /* see status-bits */ | |
43 | #define IDE_CONTROL 0x38 /* control/altstatus */ | |
44 | ||
45 | /* | |
46 | * Mac-specific registers | |
47 | */ | |
48 | ||
49 | /* | |
50 | * this register is odd; it doesn't seem to do much and it's | |
51 | * not word-aligned like virtually every other hardware register | |
52 | * on the Mac... | |
53 | */ | |
54 | ||
55 | #define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra: | |
56 | * | |
57 | * Bit 0+1: some interrupt flags | |
58 | * Bit 2+3: some interrupt enable | |
59 | * Bit 4: ?? | |
60 | * Bit 5: IDE interrupt flag (any hwif) | |
61 | * Bit 6: maybe IDE interrupt enable (any hwif) ?? | |
62 | * Bit 7: Any interrupt condition | |
63 | */ | |
64 | ||
65 | volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); | |
66 | ||
67 | static int macide_offsets[IDE_NR_PORTS] = { | |
68 | IDE_DATA, IDE_ERROR, IDE_NSECTOR, IDE_SECTOR, IDE_LCYL, | |
69 | IDE_HCYL, IDE_SELECT, IDE_STATUS, IDE_CONTROL | |
70 | }; | |
71 | ||
72 | int macide_ack_intr(ide_hwif_t* hwif) | |
73 | { | |
74 | if (*ide_ifr & 0x20) { | |
75 | *ide_ifr &= ~0x20; | |
76 | return 1; | |
77 | } | |
78 | return 0; | |
79 | } | |
80 | ||
81 | #ifdef CONFIG_BLK_DEV_MAC_MEDIABAY | |
82 | static void macide_mediabay_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
83 | { | |
84 | int state = baboon->mb_status & 0x04; | |
85 | ||
86 | printk(KERN_INFO "macide: media bay %s detected\n", state? "removal":"insertion"); | |
87 | } | |
88 | #endif | |
89 | ||
90 | /* | |
91 | * Probe for a Macintosh IDE interface | |
92 | */ | |
93 | ||
94 | void macide_init(void) | |
95 | { | |
96 | hw_regs_t hw; | |
97 | ide_hwif_t *hwif; | |
98 | int index = -1; | |
99 | ||
100 | switch (macintosh_config->ide_type) { | |
101 | case MAC_IDE_QUADRA: | |
102 | ide_setup_ports(&hw, IDE_BASE, macide_offsets, | |
103 | 0, 0, macide_ack_intr, | |
104 | // quadra_ide_iops, | |
105 | IRQ_NUBUS_F); | |
106 | index = ide_register_hw(&hw, &hwif); | |
107 | break; | |
108 | case MAC_IDE_PB: | |
109 | ide_setup_ports(&hw, IDE_BASE, macide_offsets, | |
110 | 0, 0, macide_ack_intr, | |
111 | // macide_pb_iops, | |
112 | IRQ_NUBUS_C); | |
113 | index = ide_register_hw(&hw, &hwif); | |
114 | break; | |
115 | case MAC_IDE_BABOON: | |
116 | ide_setup_ports(&hw, BABOON_BASE, macide_offsets, | |
117 | 0, 0, NULL, | |
118 | // macide_baboon_iops, | |
119 | IRQ_BABOON_1); | |
120 | index = ide_register_hw(&hw, &hwif); | |
121 | if (index == -1) break; | |
122 | if (macintosh_config->ident == MAC_MODEL_PB190) { | |
123 | ||
124 | /* Fix breakage in ide-disk.c: drive capacity */ | |
125 | /* is not initialized for drives without a */ | |
126 | /* hardware ID, and we can't get that without */ | |
127 | /* probing the drive which freezes a 190. */ | |
128 | ||
129 | ide_drive_t *drive = &ide_hwifs[index].drives[0]; | |
130 | drive->capacity64 = drive->cyl*drive->head*drive->sect; | |
131 | ||
132 | #ifdef CONFIG_BLK_DEV_MAC_MEDIABAY | |
133 | request_irq(IRQ_BABOON_2, macide_mediabay_interrupt, | |
134 | IRQ_FLG_FAST, "mediabay", | |
135 | macide_mediabay_interrupt); | |
136 | #endif | |
137 | } | |
138 | break; | |
139 | ||
140 | default: | |
141 | return; | |
142 | } | |
143 | ||
144 | if (index != -1) { | |
145 | hwif->mmio = 2; | |
146 | if (macintosh_config->ide_type == MAC_IDE_QUADRA) | |
147 | printk(KERN_INFO "ide%d: Macintosh Quadra IDE interface\n", index); | |
148 | else if (macintosh_config->ide_type == MAC_IDE_PB) | |
149 | printk(KERN_INFO "ide%d: Macintosh Powerbook IDE interface\n", index); | |
150 | else if (macintosh_config->ide_type == MAC_IDE_BABOON) | |
151 | printk(KERN_INFO "ide%d: Macintosh Powerbook Baboon IDE interface\n", index); | |
152 | else | |
153 | printk(KERN_INFO "ide%d: Unknown Macintosh IDE interface\n", index); | |
154 | } | |
155 | } |