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Commit | Line | Data |
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1da177e4 | 1 | /* |
58f189fc | 2 | * Macintosh IDE Driver |
1da177e4 LT |
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 | ||
1da177e4 LT |
14 | #include <linux/types.h> |
15 | #include <linux/mm.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/blkdev.h> | |
1da177e4 LT |
18 | #include <linux/delay.h> |
19 | #include <linux/ide.h> | |
bff7832d | 20 | #include <linux/module.h> |
50c5feee | 21 | #include <linux/platform_device.h> |
1da177e4 | 22 | |
1da177e4 | 23 | #include <asm/macintosh.h> |
50c5feee FT |
24 | |
25 | #define DRV_NAME "mac_ide" | |
1da177e4 LT |
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 | ||
1da177e4 LT |
34 | #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 | ||
56 | volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR); | |
57 | ||
f4d3ffa5 | 58 | int macide_test_irq(ide_hwif_t *hwif) |
1da177e4 | 59 | { |
eba8999c | 60 | if (*ide_ifr & 0x20) |
1da177e4 | 61 | return 1; |
1da177e4 LT |
62 | return 0; |
63 | } | |
64 | ||
eba8999c SS |
65 | static void macide_clear_irq(ide_drive_t *drive) |
66 | { | |
67 | *ide_ifr &= ~0x20; | |
68 | } | |
69 | ||
9f36d314 | 70 | static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base, |
f4d3ffa5 | 71 | int irq) |
29dd5975 BZ |
72 | { |
73 | int i; | |
74 | ||
75 | memset(hw, 0, sizeof(*hw)); | |
76 | ||
77 | for (i = 0; i < 8; i++) | |
4c3032d8 | 78 | hw->io_ports_array[i] = base + i * 4; |
29dd5975 | 79 | |
4c3032d8 | 80 | hw->io_ports.ctl_addr = base + IDE_CONTROL; |
29dd5975 BZ |
81 | |
82 | hw->irq = irq; | |
29dd5975 BZ |
83 | } |
84 | ||
eba8999c SS |
85 | static const struct ide_port_ops macide_port_ops = { |
86 | .clear_irq = macide_clear_irq, | |
f4d3ffa5 | 87 | .test_irq = macide_test_irq, |
eba8999c SS |
88 | }; |
89 | ||
211176cc | 90 | static const struct ide_port_info macide_port_info = { |
eba8999c | 91 | .port_ops = &macide_port_ops, |
09a3e791 | 92 | .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, |
255115fb | 93 | .irq_flags = IRQF_SHARED, |
29e52cf7 | 94 | .chipset = ide_generic, |
211176cc BZ |
95 | }; |
96 | ||
c99c92c5 BZ |
97 | static const char *mac_ide_name[] = |
98 | { "Quadra", "Powerbook", "Powerbook Baboon" }; | |
99 | ||
1da177e4 LT |
100 | /* |
101 | * Probe for a Macintosh IDE interface | |
102 | */ | |
103 | ||
50c5feee | 104 | static int mac_ide_probe(struct platform_device *pdev) |
1da177e4 | 105 | { |
50c5feee | 106 | struct resource *mem, *irq; |
9f36d314 | 107 | struct ide_hw hw, *hws[] = { &hw }; |
eba8999c | 108 | struct ide_port_info d = macide_port_info; |
50c5feee FT |
109 | struct ide_host *host; |
110 | int rc; | |
1da177e4 | 111 | |
3ce92a2a GU |
112 | if (!MACH_IS_MAC) |
113 | return -ENODEV; | |
114 | ||
50c5feee FT |
115 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
116 | if (!mem) | |
117 | return -ENODEV; | |
118 | ||
119 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
120 | if (!irq) | |
ade2daf9 | 121 | return -ENODEV; |
50c5feee FT |
122 | |
123 | if (!devm_request_mem_region(&pdev->dev, mem->start, | |
124 | resource_size(mem), DRV_NAME)) { | |
125 | dev_err(&pdev->dev, "resources busy\n"); | |
126 | return -EBUSY; | |
cbb010c1 | 127 | } |
1da177e4 | 128 | |
c99c92c5 BZ |
129 | printk(KERN_INFO "ide: Macintosh %s IDE controller\n", |
130 | mac_ide_name[macintosh_config->ide_type - 1]); | |
131 | ||
50c5feee | 132 | macide_setup_ports(&hw, mem->start, irq->start); |
29dd5975 | 133 | |
50c5feee FT |
134 | rc = ide_host_add(&d, hws, 1, &host); |
135 | if (rc) | |
136 | return rc; | |
137 | ||
138 | platform_set_drvdata(pdev, host); | |
139 | return 0; | |
1da177e4 | 140 | } |
ade2daf9 | 141 | |
50c5feee FT |
142 | static int mac_ide_remove(struct platform_device *pdev) |
143 | { | |
144 | struct ide_host *host = platform_get_drvdata(pdev); | |
145 | ||
146 | ide_host_remove(host); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static struct platform_driver mac_ide_driver = { | |
151 | .driver = { | |
152 | .name = DRV_NAME, | |
153 | }, | |
154 | .probe = mac_ide_probe, | |
155 | .remove = mac_ide_remove, | |
156 | }; | |
157 | ||
158 | module_platform_driver(mac_ide_driver); | |
37c807a2 | 159 | |
50c5feee | 160 | MODULE_ALIAS("platform:" DRV_NAME); |
37c807a2 | 161 | MODULE_LICENSE("GPL"); |