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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/delay.h>
19#include <linux/ide.h>
20
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070056int 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
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010065static 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++)
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +020073 hw->io_ports_array[i] = base + i * 4;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010074
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +020075 hw->io_ports.ctl_addr = base + IDE_CONTROL;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010076
77 hw->irq = irq;
78 hw->ack_intr = ack_intr;
Bartlomiej Zolnierkiewiczd427e832008-06-10 20:56:37 +020079
80 hw->chipset = ide_generic;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010081}
82
Bartlomiej Zolnierkiewicz211176c2009-03-27 12:46:18 +010083static const struct ide_port_info macide_port_info = {
Bartlomiej Zolnierkiewicz09a3e792009-03-27 12:46:23 +010084 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
Bartlomiej Zolnierkiewicz255115fb2009-03-27 12:46:27 +010085 .irq_flags = IRQF_SHARED,
Bartlomiej Zolnierkiewicz211176c2009-03-27 12:46:18 +010086};
87
Bartlomiej Zolnierkiewiczc99c92c2008-01-26 20:13:09 +010088static const char *mac_ide_name[] =
89 { "Quadra", "Powerbook", "Powerbook Baboon" };
90
Linus Torvalds1da177e2005-04-16 15:20:36 -070091/*
92 * Probe for a Macintosh IDE interface
93 */
94
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +010095static int __init macide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010097 ide_ack_intr_t *ack_intr;
98 unsigned long base;
99 int irq;
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +0200100 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Geert Uytterhoeven3ce92a22008-05-18 20:47:14 +0200102 if (!MACH_IS_MAC)
103 return -ENODEV;
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 switch (macintosh_config->ide_type) {
106 case MAC_IDE_QUADRA:
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100107 base = IDE_BASE;
108 ack_intr = macide_ack_intr;
109 irq = IRQ_NUBUS_F;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 break;
111 case MAC_IDE_PB:
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100112 base = IDE_BASE;
113 ack_intr = macide_ack_intr;
114 irq = IRQ_NUBUS_C;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 break;
116 case MAC_IDE_BABOON:
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100117 base = BABOON_BASE;
118 ack_intr = NULL;
119 irq = IRQ_BABOON_1;
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100120 break;
121 default:
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100122 return -ENODEV;
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100123 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Bartlomiej Zolnierkiewiczc99c92c2008-01-26 20:13:09 +0100125 printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
126 mac_ide_name[macintosh_config->ide_type - 1]);
127
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100128 macide_setup_ports(&hw, base, irq, ack_intr);
129
Bartlomiej Zolnierkiewicz211176c2009-03-27 12:46:18 +0100130 return ide_host_add(&macide_port_info, hws, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131}
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100132
133module_init(macide_init);
Adrian Bunk37c807a2008-04-02 21:22:04 +0200134
135MODULE_LICENSE("GPL");