ide-legacy.c revision 29e52cf793ded6bece50de50e738596f94f07d9f 
1#include <linux/kernel.h>
2#include <linux/ide.h>
3
4static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw,
5				u8 port_no, const struct ide_port_info *d,
6				unsigned long config)
7{
8	unsigned long base, ctl;
9	int irq;
10
11	if (port_no == 0) {
12		base = 0x1f0;
13		ctl  = 0x3f6;
14		irq  = 14;
15	} else {
16		base = 0x170;
17		ctl  = 0x376;
18		irq  = 15;
19	}
20
21	if (!request_region(base, 8, d->name)) {
22		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
23				d->name, base, base + 7);
24		return;
25	}
26
27	if (!request_region(ctl, 1, d->name)) {
28		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
29				d->name, ctl);
30		release_region(base, 8);
31		return;
32	}
33
34	ide_std_init_ports(hw, base, ctl);
35	hw->irq = irq;
36	hw->config = config;
37
38	hws[port_no] = hw;
39}
40
41int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
42{
43	hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL };
44
45	memset(&hw, 0, sizeof(hw));
46
47	if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
48		ide_legacy_init_one(hws, &hw[0], 0, d, config);
49	ide_legacy_init_one(hws, &hw[1], 1, d, config);
50
51	if (hws[0] == NULL && hws[1] == NULL &&
52	    (d->host_flags & IDE_HFLAG_SINGLE))
53		return -ENOENT;
54
55	return ide_host_add(d, hws, NULL);
56}
57EXPORT_SYMBOL_GPL(ide_legacy_device_add);
58