[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ide / ide-4drives.c


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

#define DRV_NAME "ide-4drives"

static bool probe_4drives;

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

static void ide_4drives_init_dev(ide_drive_t *drive)
{
	if (drive->hwif->channel)
		drive->select ^= 0x20;
}

static const struct ide_port_ops ide_4drives_port_ops = {
	.init_dev		= ide_4drives_init_dev,
};

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 |
				  IDE_HFLAG_4DRIVES,
	.chipset		= ide_4drives,
};

static int __init ide_4drives_init(void)
{
	unsigned long base = 0x1f0, ctl = 0x3f6;
	struct ide_hw hw, *hws[] = { &hw, &hw };

	if (probe_4drives == 0)
		return -ENODEV;

	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;
	}

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

	ide_std_init_ports(&hw, base, ctl);
	hw.irq = 14;

	return ide_host_add(&ide_4drives_port_info, hws, 2, NULL);
}

module_init(ide_4drives_init);

MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
MODULE_LICENSE("GPL");
Commit	Line	Data
ffd4f6f0 BZ	1
	2	#include <linux/kernel.h>
	3	#include <linux/init.h>
	4	#include <linux/module.h>
	5	#include <linux/ide.h>
	6
2c4be251 BZ	7	#define DRV_NAME "ide-4drives"
2c4be251 BZ	8
90ab5ee9	9	static bool probe_4drives;
ffd4f6f0 BZ	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
e6d95bd1	14	static void ide_4drives_init_dev(ide_drive_t *drive)
f333f92b	15	{
e6d95bd1	16	if (drive->hwif->channel)
7f612f27	17	drive->select ^= 0x20;
f333f92b BZ	18	}
	19
	20	static const struct ide_port_ops ide_4drives_port_ops = {
e6d95bd1	21	.init_dev = ide_4drives_init_dev,
f333f92b BZ	22	};
	23
	24	static const struct ide_port_info ide_4drives_port_info = {
	25	.port_ops = &ide_4drives_port_ops,
c094ea07 BZ	26	.host_flags = IDE_HFLAG_SERIALIZE \| IDE_HFLAG_NO_DMA \|
c094ea07 BZ	27	IDE_HFLAG_4DRIVES,
29e52cf7	28	.chipset = ide_4drives,
f333f92b BZ	29	};
f333f92b BZ	30
ffd4f6f0 BZ	31	static int __init ide_4drives_init(void)
ffd4f6f0 BZ	32	{
2c4be251	33	unsigned long base = 0x1f0, ctl = 0x3f6;
9f36d314	34	struct ide_hw hw, *hws[] = { &hw, &hw };
ffd4f6f0 BZ	35
	36	if (probe_4drives == 0)
	37	return -ENODEV;
	38
2c4be251 BZ	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
dfd87842	52	memset(&hw, 0, sizeof(hw));
ffd4f6f0	53
2c4be251	54	ide_std_init_ports(&hw, base, ctl);
dfd87842	55	hw.irq = 14;
ffd4f6f0	56
dca39830	57	return ide_host_add(&ide_4drives_port_info, hws, 2, NULL);
ffd4f6f0 BZ	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");