1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/*
* generic/default IDE host driver
*
* Copyright (C) 2004, 2008 Bartlomiej Zolnierkiewicz
* This code was split off from ide.c. See it for original copyrights.
*
* May be copied or modified under the terms of the GNU General Public License.
*/
/*
* For special cases new interfaces may be added using sysfs, i.e.
*
* echo -n "0x168:0x36e:10" > /sys/class/ide_generic/add
*
* will add an interface using I/O ports 0x168-0x16f/0x36e and IRQ 10.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/ide.h>
#define DRV_NAME "ide_generic"
static ssize_t store_add(struct class *cls, const char *buf, size_t n)
{
ide_hwif_t *hwif;
unsigned int base, ctl;
int irq;
hw_regs_t hw;
u8 idx[] = { 0xff, 0xff, 0xff, 0xff };
if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
return -EINVAL;
hwif = ide_find_port(base);
if (hwif == NULL)
return -ENOENT;
memset(&hw, 0, sizeof(hw));
ide_std_init_ports(&hw, base, ctl);
hw.irq = irq;
hw.chipset = ide_generic;
ide_init_port_hw(hwif, &hw);
idx[0] = hwif->index;
ide_device_add(idx, NULL);
return n;
};
static struct class_attribute ide_generic_class_attrs[] = {
__ATTR(add, S_IWUSR, NULL, store_add),
__ATTR_NULL
};
static void ide_generic_class_release(struct class *cls)
{
kfree(cls);
}
static int __init ide_generic_sysfs_init(void)
{
struct class *cls;
int rc;
cls = kzalloc(sizeof(*cls), GFP_KERNEL);
if (!cls)
return -ENOMEM;
cls->name = DRV_NAME;
cls->owner = THIS_MODULE;
cls->class_release = ide_generic_class_release;
cls->class_attrs = ide_generic_class_attrs;
rc = class_register(cls);
if (rc) {
kfree(cls);
return rc;
}
return 0;
}
static int __init ide_generic_init(void)
{
u8 idx[MAX_HWIFS];
int i;
for (i = 0; i < MAX_HWIFS; i++) {
ide_hwif_t *hwif = &ide_hwifs[i];
if (hwif->io_ports[IDE_DATA_OFFSET] &&
hwif->chipset == ide_unknown)
idx[i] = i;
else
idx[i] = 0xff;
}
ide_device_add_all(idx, NULL);
if (ide_generic_sysfs_init())
printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
"class\n");
return 0;
}
module_init(ide_generic_init);
MODULE_LICENSE("GPL");
|
