tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 int 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};
28
29static int __init ide_4drives_init(void)
30{
31 unsigned long base = 0x1f0, ctl = 0x3f6;
32 hw_regs_t hw, *hws[] = { &hw, &hw, NULL, NULL };
33
34 if (probe_4drives == 0)
35 return -ENODEV;
36
37 if (!request_region(base, 8, DRV_NAME)) {
38 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
39 DRV_NAME, base, base + 7);
40 return -EBUSY;
41 }
42
43 if (!request_region(ctl, 1, DRV_NAME)) {
44 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
45 DRV_NAME, ctl);
46 release_region(base, 8);
47 return -EBUSY;
48 }
49
50 memset(&hw, 0, sizeof(hw));
51
52 ide_std_init_ports(&hw, base, ctl);
53 hw.irq = 14;
54 hw.chipset = ide_4drives;
55
56 return ide_host_add(&ide_4drives_port_info, hws, NULL);
57}
58
59module_init(ide_4drives_init);
60
61MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
62MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
63MODULE_LICENSE("GPL");