tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * 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/delay.h>
19#include <linux/ide.h>
20
21#include <asm/macintosh.h>
22#include <asm/macints.h>
23#include <asm/mac_baboon.h>
24
25#define IDE_BASE 0x50F1A000 /* Base address of IDE controller */
26
27/*
28 * Generic IDE registers as offsets from the base
29 * These match MkLinux so they should be correct.
30 */
31
32#define IDE_CONTROL 0x38 /* control/altstatus */
33
34/*
35 * Mac-specific registers
36 */
37
38/*
39 * this register is odd; it doesn't seem to do much and it's
40 * not word-aligned like virtually every other hardware register
41 * on the Mac...
42 */
43
44#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
45 *
46 * Bit 0+1: some interrupt flags
47 * Bit 2+3: some interrupt enable
48 * Bit 4: ??
49 * Bit 5: IDE interrupt flag (any hwif)
50 * Bit 6: maybe IDE interrupt enable (any hwif) ??
51 * Bit 7: Any interrupt condition
52 */
53
54volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
55
56int macide_ack_intr(ide_hwif_t* hwif)
57{
58 if (*ide_ifr & 0x20) {
59 *ide_ifr &= ~0x20;
60 return 1;
61 }
62 return 0;
63}
64
65static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
66 int irq, ide_ack_intr_t *ack_intr)
67{
68 int i;
69
70 memset(hw, 0, sizeof(*hw));
71
72 for (i = 0; i < 8; i++)
73 hw->io_ports_array[i] = base + i * 4;
74
75 hw->io_ports.ctl_addr = base + IDE_CONTROL;
76
77 hw->irq = irq;
78 hw->ack_intr = ack_intr;
79
80 hw->chipset = ide_generic;
81}
82
83static const char *mac_ide_name[] =
84 { "Quadra", "Powerbook", "Powerbook Baboon" };
85
86/*
87 * Probe for a Macintosh IDE interface
88 */
89
90static int __init macide_init(void)
91{
92 ide_ack_intr_t *ack_intr;
93 unsigned long base;
94 int irq;
95 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
96
97 if (!MACH_IS_MAC)
98 return -ENODEV;
99
100 switch (macintosh_config->ide_type) {
101 case MAC_IDE_QUADRA:
102 base = IDE_BASE;
103 ack_intr = macide_ack_intr;
104 irq = IRQ_NUBUS_F;
105 break;
106 case MAC_IDE_PB:
107 base = IDE_BASE;
108 ack_intr = macide_ack_intr;
109 irq = IRQ_NUBUS_C;
110 break;
111 case MAC_IDE_BABOON:
112 base = BABOON_BASE;
113 ack_intr = NULL;
114 irq = IRQ_BABOON_1;
115 break;
116 default:
117 return -ENODEV;
118 }
119
120 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
121 mac_ide_name[macintosh_config->ide_type - 1]);
122
123 macide_setup_ports(&hw, base, irq, ack_intr);
124
125 return ide_host_add(NULL, hws, NULL);
126}
127
128module_init(macide_init);
129
130MODULE_LICENSE("GPL");