1 /*
2 * linux/drivers/ide/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("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 int index = -1;
98
99 switch (macintosh_config->ide_type) {
100 case MAC_IDE_QUADRA:
101 ide_setup_ports(&hw, (ide_ioreg_t)IDE_BASE, macide_offsets,
102 0, 0, macide_ack_intr, IRQ_NUBUS_F);
103 index = ide_register_hw(&hw, NULL);
104 break;
105 case MAC_IDE_PB:
106 ide_setup_ports(&hw, (ide_ioreg_t)IDE_BASE, macide_offsets,
107 0, 0, macide_ack_intr, IRQ_NUBUS_C);
108 index = ide_register_hw(&hw, NULL);
109 break;
110 case MAC_IDE_BABOON:
111 ide_setup_ports(&hw, (ide_ioreg_t)BABOON_BASE, macide_offsets,
112 0, 0, NULL, IRQ_BABOON_1);
113 index = ide_register_hw(&hw, NULL);
114 if (index == -1) break;
115 if (macintosh_config->ident == MAC_MODEL_PB190) {
116
117 /* Fix breakage in ide-disk.c: drive capacity */
118 /* is not initialized for drives without a */
119 /* hardware ID, and we cna't get that without */
120 /* probing the drive which freezes a 190. */
121
122 ide_drive_t *drive = &ide_hwifs[index].drives[0];
123 drive->capacity = drive->cyl*drive->head*drive->sect;
124
125 #ifdef CONFIG_BLK_DEV_MAC_MEDIABAY
126 request_irq(IRQ_BABOON_2, macide_mediabay_interrupt,
127 IRQ_FLG_FAST, "mediabay",
128 macide_mediabay_interrupt);
129 #endif
130 }
131 break;
132
133 default:
134 return;
135 }
136
137 if (index != -1) {
138 if (macintosh_config->ide_type == MAC_IDE_QUADRA)
139 printk("ide%d: Macintosh Quadra IDE interface\n", index);
140 else if (macintosh_config->ide_type == MAC_IDE_PB)
141 printk("ide%d: Macintosh Powerbook IDE interface\n", index);
142 else if (macintosh_config->ide_type == MAC_IDE_BABOON)
143 printk("ide%d: Macintosh Powerbook Baboon IDE interface\n", index);
144 else
145 printk("ide%d: Unknown Macintosh IDE interface\n", index);
146 }
147 }
148
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