blob: a0bb167980e745fee8be4274edc0579101de22c3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz58f189f2008-02-01 23:09:33 +01002 * Macintosh IDE Driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#define IDE_CONTROL 0x38 /* control/altstatus */
35
36/*
37 * Mac-specific registers
38 */
39
40/*
41 * this register is odd; it doesn't seem to do much and it's
42 * not word-aligned like virtually every other hardware register
43 * on the Mac...
44 */
45
46#define IDE_IFR 0x101 /* (0x101) IDE interrupt flags on Quadra:
47 *
48 * Bit 0+1: some interrupt flags
49 * Bit 2+3: some interrupt enable
50 * Bit 4: ??
51 * Bit 5: IDE interrupt flag (any hwif)
52 * Bit 6: maybe IDE interrupt enable (any hwif) ??
53 * Bit 7: Any interrupt condition
54 */
55
56volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058int macide_ack_intr(ide_hwif_t* hwif)
59{
60 if (*ide_ifr & 0x20) {
61 *ide_ifr &= ~0x20;
62 return 1;
63 }
64 return 0;
65}
66
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010067static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
68 int irq, ide_ack_intr_t *ack_intr)
69{
70 int i;
71
72 memset(hw, 0, sizeof(*hw));
73
74 for (i = 0; i < 8; i++)
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +020075 hw->io_ports_array[i] = base + i * 4;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010076
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +020077 hw->io_ports.ctl_addr = base + IDE_CONTROL;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010078
79 hw->irq = irq;
80 hw->ack_intr = ack_intr;
Bartlomiej Zolnierkiewiczd427e832008-06-10 20:56:37 +020081
82 hw->chipset = ide_generic;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010083}
84
Bartlomiej Zolnierkiewiczc99c92c2008-01-26 20:13:09 +010085static const char *mac_ide_name[] =
86 { "Quadra", "Powerbook", "Powerbook Baboon" };
87
Linus Torvalds1da177e2005-04-16 15:20:36 -070088/*
89 * Probe for a Macintosh IDE interface
90 */
91
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +010092static int __init macide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070093{
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010094 ide_ack_intr_t *ack_intr;
95 unsigned long base;
96 int irq;
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +020097 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Geert Uytterhoeven3ce92a22008-05-18 20:47:14 +020099 if (!MACH_IS_MAC)
100 return -ENODEV;
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 switch (macintosh_config->ide_type) {
103 case MAC_IDE_QUADRA:
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100104 base = IDE_BASE;
105 ack_intr = macide_ack_intr;
106 irq = IRQ_NUBUS_F;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 break;
108 case MAC_IDE_PB:
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100109 base = IDE_BASE;
110 ack_intr = macide_ack_intr;
111 irq = IRQ_NUBUS_C;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 break;
113 case MAC_IDE_BABOON:
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100114 base = BABOON_BASE;
115 ack_intr = NULL;
116 irq = IRQ_BABOON_1;
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100117 break;
118 default:
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100119 return -ENODEV;
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100120 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Bartlomiej Zolnierkiewiczc99c92c2008-01-26 20:13:09 +0100122 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
123 mac_ide_name[macintosh_config->ide_type - 1]);
124
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100125 macide_setup_ports(&hw, base, irq, ack_intr);
126
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +0200127 return ide_host_add(NULL, hws, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128}
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100129
130module_init(macide_init);
Adrian Bunk37c807a2008-04-02 21:22:04 +0200131
132MODULE_LICENSE("GPL");