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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 | ||
0cbccbc3 BZ |
25 | static int probe_mask = 0x03; |
26 | module_param(probe_mask, int, 0); | |
27 | MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports"); | |
28 | ||
f0298512 BZ |
29 | static ssize_t store_add(struct class *cls, const char *buf, size_t n) |
30 | { | |
f0298512 | 31 | unsigned int base, ctl; |
6f904d01 | 32 | int irq, rc; |
c97c6aca | 33 | hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; |
f0298512 BZ |
34 | |
35 | if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3) | |
36 | return -EINVAL; | |
37 | ||
f0298512 BZ |
38 | memset(&hw, 0, sizeof(hw)); |
39 | ide_std_init_ports(&hw, base, ctl); | |
40 | hw.irq = irq; | |
41 | hw.chipset = ide_generic; | |
42 | ||
6f904d01 BZ |
43 | rc = ide_host_add(NULL, hws, NULL); |
44 | if (rc) | |
45 | return rc; | |
f0298512 BZ |
46 | |
47 | return n; | |
48 | }; | |
49 | ||
50 | static struct class_attribute ide_generic_class_attrs[] = { | |
51 | __ATTR(add, S_IWUSR, NULL, store_add), | |
52 | __ATTR_NULL | |
53 | }; | |
54 | ||
55 | static void ide_generic_class_release(struct class *cls) | |
56 | { | |
57 | kfree(cls); | |
58 | } | |
59 | ||
60 | static int __init ide_generic_sysfs_init(void) | |
61 | { | |
62 | struct class *cls; | |
63 | int rc; | |
64 | ||
65 | cls = kzalloc(sizeof(*cls), GFP_KERNEL); | |
66 | if (!cls) | |
67 | return -ENOMEM; | |
68 | ||
69 | cls->name = DRV_NAME; | |
70 | cls->owner = THIS_MODULE; | |
71 | cls->class_release = ide_generic_class_release; | |
72 | cls->class_attrs = ide_generic_class_attrs; | |
73 | ||
74 | rc = class_register(cls); | |
75 | if (rc) { | |
76 | kfree(cls); | |
77 | return rc; | |
78 | } | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
1da177e4 LT |
83 | static int __init ide_generic_init(void) |
84 | { | |
c97c6aca | 85 | hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS]; |
48c3c107 | 86 | struct ide_host *host; |
8a69580e BZ |
87 | unsigned long io_addr; |
88 | int i, rc; | |
151575e4 | 89 | |
dbdec839 BZ |
90 | #ifdef CONFIG_MIPS |
91 | if (!ide_probe_legacy()) | |
92 | return -ENODEV; | |
93 | #endif | |
0cbccbc3 BZ |
94 | printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module " |
95 | "parameter for probing all legacy ISA IDE ports\n"); | |
96 | ||
b2a53bc6 | 97 | for (i = 0; i < MAX_HWIFS; i++) { |
8a69580e | 98 | io_addr = ide_default_io_base(i); |
486c92e2 | 99 | |
c97c6aca | 100 | hws[i] = NULL; |
16649498 | 101 | |
0cbccbc3 | 102 | if ((probe_mask & (1 << i)) && io_addr) { |
16649498 BZ |
103 | if (!request_region(io_addr, 8, DRV_NAME)) { |
104 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX " | |
105 | "not free.\n", | |
106 | DRV_NAME, io_addr, io_addr + 7); | |
107 | continue; | |
108 | } | |
109 | ||
110 | if (!request_region(io_addr + 0x206, 1, DRV_NAME)) { | |
111 | printk(KERN_ERR "%s: I/O resource 0x%lX " | |
112 | "not free.\n", | |
113 | DRV_NAME, io_addr + 0x206); | |
114 | release_region(io_addr, 8); | |
115 | continue; | |
116 | } | |
117 | ||
c97c6aca BZ |
118 | memset(&hw[i], 0, sizeof(hw[i])); |
119 | ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206); | |
120 | hw[i].irq = ide_default_irq(io_addr); | |
121 | hw[i].chipset = ide_generic; | |
b2a53bc6 | 122 | |
c97c6aca | 123 | hws[i] = &hw[i]; |
16649498 | 124 | } |
b2a53bc6 | 125 | } |
151575e4 | 126 | |
48c3c107 | 127 | host = ide_host_alloc_all(NULL, hws); |
8a69580e BZ |
128 | if (host == NULL) { |
129 | rc = -ENOMEM; | |
130 | goto err; | |
131 | } | |
132 | ||
133 | rc = ide_host_register(host, NULL, hws); | |
134 | if (rc) | |
135 | goto err_free; | |
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 | 141 | return 0; |
8a69580e BZ |
142 | err_free: |
143 | ide_host_free(host); | |
144 | err: | |
145 | for (i = 0; i < MAX_HWIFS; i++) { | |
146 | if (hws[i] == NULL) | |
147 | continue; | |
148 | ||
149 | io_addr = hws[i]->io_ports.data_addr; | |
150 | release_region(io_addr + 0x206, 1); | |
151 | release_region(io_addr, 8); | |
152 | } | |
153 | return rc; | |
1da177e4 LT |
154 | } |
155 | ||
156 | module_init(ide_generic_init); | |
157 | ||
158 | MODULE_LICENSE("GPL"); |