ide-4drives.c 1.6 KB
Newer Older
1 2 3 4 5 6

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/ide.h>

7 8
#define DRV_NAME "ide-4drives"

9
static int probe_4drives;
10 11 12 13

module_param_named(probe, probe_4drives, bool, 0);
MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");

14
static void ide_4drives_init_dev(ide_drive_t *drive)
15
{
16 17
	if (drive->hwif->channel)
		drive->select.all ^= 0x20;
18 19 20
}

static const struct ide_port_ops ide_4drives_port_ops = {
21
	.init_dev		= ide_4drives_init_dev,
22 23 24 25 26 27 28
};

static const struct ide_port_info ide_4drives_port_info = {
	.port_ops		= &ide_4drives_port_ops,
	.host_flags		= IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA,
};

29 30
static int __init ide_4drives_init(void)
{
31
	struct ide_host *host;
32
	unsigned long base = 0x1f0, ctl = 0x3f6;
33
	hw_regs_t hw, *hws[] = { &hw, &hw, NULL, NULL };
34 35 36 37

	if (probe_4drives == 0)
		return -ENODEV;

38 39 40 41 42 43 44 45 46 47 48 49 50
	if (!request_region(base, 8, DRV_NAME)) {
		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
				DRV_NAME, base, base + 7);
		return -EBUSY;
	}

	if (!request_region(ctl, 1, DRV_NAME)) {
		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
				DRV_NAME, ctl);
		release_region(base, 8);
		return -EBUSY;
	}

51
	memset(&hw, 0, sizeof(hw));
52

53
	ide_std_init_ports(&hw, base, ctl);
54 55
	hw.irq = 14;
	hw.chipset = ide_4drives;
56

57 58 59
	host = ide_host_alloc(&ide_4drives_port_info, hws);
	if (host)
		ide_host_register(host, &ide_4drives_port_info, hws);
60 61 62 63 64 65 66 67 68

	return 0;
}

module_init(ide_4drives_init);

MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
MODULE_LICENSE("GPL");