1
2#include <linux/kernel.h>
3#include <linux/init.h>
4#include <linux/module.h>
5#include <linux/ide.h>
6
7#define DRV_NAME "ide-4drives"
8
9static bool probe_4drives;
10
11module_param_named(probe, probe_4drives, bool, 0);
12MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
13
14static void ide_4drives_init_dev(ide_drive_t *drive)
15{
16	if (drive->hwif->channel)
17		drive->select ^= 0x20;
18}
19
20static const struct ide_port_ops ide_4drives_port_ops = {
21	.init_dev		= ide_4drives_init_dev,
22};
23
24static const struct ide_port_info ide_4drives_port_info = {
25	.port_ops		= &ide_4drives_port_ops,
26	.host_flags		= IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA |
27				  IDE_HFLAG_4DRIVES,
28	.chipset		= ide_4drives,
29};
30
31static int __init ide_4drives_init(void)
32{
33	unsigned long base = 0x1f0, ctl = 0x3f6;
34	struct ide_hw hw, *hws[] = { &hw, &hw };
35
36	if (probe_4drives == 0)
37		return -ENODEV;
38
39	if (!request_region(base, 8, DRV_NAME)) {
40		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
41				DRV_NAME, base, base + 7);
42		return -EBUSY;
43	}
44
45	if (!request_region(ctl, 1, DRV_NAME)) {
46		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
47				DRV_NAME, ctl);
48		release_region(base, 8);
49		return -EBUSY;
50	}
51
52	memset(&hw, 0, sizeof(hw));
53
54	ide_std_init_ports(&hw, base, ctl);
55	hw.irq = 14;
56
57	return ide_host_add(&ide_4drives_port_info, hws, 2, NULL);
58}
59
60module_init(ide_4drives_init);
61
62MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
63MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
64MODULE_LICENSE("GPL");
65