tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/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
64volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
65
66static 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
71int 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
80#ifdef CONFIG_BLK_DEV_MAC_MEDIABAY
81static void macide_mediabay_interrupt(int irq, void *dev_id)
82{
83 int state = baboon->mb_status & 0x04;
84
85 printk(KERN_INFO "macide: media bay %s detected\n", state? "removal":"insertion");
86}
87#endif
88
89/*
90 * Probe for a Macintosh IDE interface
91 */
92
93void macide_init(void)
94{
95 hw_regs_t hw;
96 ide_hwif_t *hwif;
97 int index = -1;
98
99 switch (macintosh_config->ide_type) {
100 case MAC_IDE_QUADRA:
101 ide_setup_ports(&hw, IDE_BASE, macide_offsets,
102 0, 0, macide_ack_intr,
103// quadra_ide_iops,
104 IRQ_NUBUS_F);
105 index = ide_register_hw(&hw, &hwif);
106 break;
107 case MAC_IDE_PB:
108 ide_setup_ports(&hw, IDE_BASE, macide_offsets,
109 0, 0, macide_ack_intr,
110// macide_pb_iops,
111 IRQ_NUBUS_C);
112 index = ide_register_hw(&hw, &hwif);
113 break;
114 case MAC_IDE_BABOON:
115 ide_setup_ports(&hw, BABOON_BASE, macide_offsets,
116 0, 0, NULL,
117// macide_baboon_iops,
118 IRQ_BABOON_1);
119 index = ide_register_hw(&hw, &hwif);
120 if (index == -1) break;
121 if (macintosh_config->ident == MAC_MODEL_PB190) {
122
123 /* Fix breakage in ide-disk.c: drive capacity */
124 /* is not initialized for drives without a */
125 /* hardware ID, and we can't get that without */
126 /* probing the drive which freezes a 190. */
127
128 ide_drive_t *drive = &ide_hwifs[index].drives[0];
129 drive->capacity64 = drive->cyl*drive->head*drive->sect;
130
131#ifdef CONFIG_BLK_DEV_MAC_MEDIABAY
132 request_irq(IRQ_BABOON_2, macide_mediabay_interrupt,
133 IRQ_FLG_FAST, "mediabay",
134 macide_mediabay_interrupt);
135#endif
136 }
137 break;
138
139 default:
140 return;
141 }
142
143 if (index != -1) {
144 hwif->mmio = 2;
145 if (macintosh_config->ide_type == MAC_IDE_QUADRA)
146 printk(KERN_INFO "ide%d: Macintosh Quadra IDE interface\n", index);
147 else if (macintosh_config->ide_type == MAC_IDE_PB)
148 printk(KERN_INFO "ide%d: Macintosh Powerbook IDE interface\n", index);
149 else if (macintosh_config->ide_type == MAC_IDE_BABOON)
150 printk(KERN_INFO "ide%d: Macintosh Powerbook Baboon IDE interface\n", index);
151 else
152 printk(KERN_INFO "ide%d: Unknown Macintosh IDE interface\n", index);
153 }
154}