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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * generic/default IDE host driver | |
3 | * | |
f0298512 | 4 | * Copyright (C) 2004, 2008 Bartlomiej Zolnierkiewicz |
1da177e4 LT |
5 | * This code was split off from ide.c. See it for original copyrights. |
6 | * | |
7 | * May be copied or modified under the terms of the GNU General Public License. | |
8 | */ | |
9 | ||
f0298512 BZ |
10 | /* |
11 | * For special cases new interfaces may be added using sysfs, i.e. | |
12 | * | |
13 | * echo -n "0x168:0x36e:10" > /sys/class/ide_generic/add | |
14 | * | |
15 | * will add an interface using I/O ports 0x168-0x16f/0x36e and IRQ 10. | |
16 | */ | |
17 | ||
1da177e4 LT |
18 | #include <linux/kernel.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/ide.h> | |
22 | ||
f0298512 BZ |
23 | #define DRV_NAME "ide_generic" |
24 | ||
25 | static ssize_t store_add(struct class *cls, const char *buf, size_t n) | |
26 | { | |
27 | ide_hwif_t *hwif; | |
28 | unsigned int base, ctl; | |
29 | int irq; | |
30 | hw_regs_t hw; | |
31 | u8 idx[] = { 0xff, 0xff, 0xff, 0xff }; | |
32 | ||
33 | if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3) | |
34 | return -EINVAL; | |
35 | ||
59bff5ba | 36 | hwif = ide_find_port(); |
f0298512 BZ |
37 | if (hwif == NULL) |
38 | return -ENOENT; | |
39 | ||
40 | memset(&hw, 0, sizeof(hw)); | |
41 | ide_std_init_ports(&hw, base, ctl); | |
42 | hw.irq = irq; | |
43 | hw.chipset = ide_generic; | |
44 | ||
45 | ide_init_port_hw(hwif, &hw); | |
46 | ||
47 | idx[0] = hwif->index; | |
48 | ||
49 | ide_device_add(idx, NULL); | |
50 | ||
51 | return n; | |
52 | }; | |
53 | ||
54 | static struct class_attribute ide_generic_class_attrs[] = { | |
55 | __ATTR(add, S_IWUSR, NULL, store_add), | |
56 | __ATTR_NULL | |
57 | }; | |
58 | ||
59 | static void ide_generic_class_release(struct class *cls) | |
60 | { | |
61 | kfree(cls); | |
62 | } | |
63 | ||
64 | static int __init ide_generic_sysfs_init(void) | |
65 | { | |
66 | struct class *cls; | |
67 | int rc; | |
68 | ||
69 | cls = kzalloc(sizeof(*cls), GFP_KERNEL); | |
70 | if (!cls) | |
71 | return -ENOMEM; | |
72 | ||
73 | cls->name = DRV_NAME; | |
74 | cls->owner = THIS_MODULE; | |
75 | cls->class_release = ide_generic_class_release; | |
76 | cls->class_attrs = ide_generic_class_attrs; | |
77 | ||
78 | rc = class_register(cls); | |
79 | if (rc) { | |
80 | kfree(cls); | |
81 | return rc; | |
82 | } | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
1da177e4 LT |
87 | static int __init ide_generic_init(void) |
88 | { | |
151575e4 BZ |
89 | u8 idx[MAX_HWIFS]; |
90 | int i; | |
91 | ||
b2a53bc6 | 92 | for (i = 0; i < MAX_HWIFS; i++) { |
dc9114e2 | 93 | ide_hwif_t *hwif; |
486c92e2 BZ |
94 | unsigned long io_addr = ide_default_io_base(i); |
95 | hw_regs_t hw; | |
96 | ||
16649498 BZ |
97 | idx[i] = 0xff; |
98 | ||
dc9114e2 | 99 | if (io_addr) { |
16649498 BZ |
100 | if (!request_region(io_addr, 8, DRV_NAME)) { |
101 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX " | |
102 | "not free.\n", | |
103 | DRV_NAME, io_addr, io_addr + 7); | |
104 | continue; | |
105 | } | |
106 | ||
107 | if (!request_region(io_addr + 0x206, 1, DRV_NAME)) { | |
108 | printk(KERN_ERR "%s: I/O resource 0x%lX " | |
109 | "not free.\n", | |
110 | DRV_NAME, io_addr + 0x206); | |
111 | release_region(io_addr, 8); | |
112 | continue; | |
113 | } | |
114 | ||
dc9114e2 BZ |
115 | /* |
116 | * Skip probing if the corresponding | |
117 | * slot is already occupied. | |
118 | */ | |
119 | hwif = ide_find_port(); | |
120 | if (hwif == NULL || hwif->index != i) { | |
121 | idx[i] = 0xff; | |
122 | continue; | |
123 | } | |
124 | ||
486c92e2 BZ |
125 | memset(&hw, 0, sizeof(hw)); |
126 | ide_std_init_ports(&hw, io_addr, io_addr + 0x206); | |
273b8385 | 127 | hw.irq = ide_default_irq(io_addr); |
343a3451 | 128 | hw.chipset = ide_generic; |
486c92e2 | 129 | ide_init_port_hw(hwif, &hw); |
b2a53bc6 | 130 | |
b2a53bc6 | 131 | idx[i] = i; |
16649498 | 132 | } |
b2a53bc6 | 133 | } |
151575e4 | 134 | |
c413b9b9 | 135 | ide_device_add_all(idx, NULL); |
1da177e4 | 136 | |
f0298512 BZ |
137 | if (ide_generic_sysfs_init()) |
138 | printk(KERN_ERR DRV_NAME ": failed to create ide_generic " | |
139 | "class\n"); | |
140 | ||
1da177e4 LT |
141 | return 0; |
142 | } | |
143 | ||
144 | module_init(ide_generic_init); | |
145 | ||
146 | MODULE_LICENSE("GPL"); |