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
9 static bool probe_4drives;
10
11 module_param_named(probe, probe_4drives, bool, 0);
12 MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
13
ide_4drives_init_dev(ide_drive_t * drive)14 static void ide_4drives_init_dev(ide_drive_t *drive)
15 {
16 if (drive->hwif->channel)
17 drive->select ^= 0x20;
18 }
19
20 static const struct ide_port_ops ide_4drives_port_ops = {
21 .init_dev = ide_4drives_init_dev,
22 };
23
24 static 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
ide_4drives_init(void)31 static 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
60 module_init(ide_4drives_init);
61
62 MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
63 MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
64 MODULE_LICENSE("GPL");
65