[mirror_ubuntu-zesty-kernel.git] / drivers / ide / ide-generic.c

/*
 * generic/default IDE host driver
 *
 * Copyright (C) 2004, 2008 Bartlomiej Zolnierkiewicz
 * This code was split off from ide.c.  See it for original copyrights.
 *
 * May be copied or modified under the terms of the GNU General Public License.
 */

/*
 * For special cases new interfaces may be added using sysfs, i.e.
 *
 *	echo -n "0x168:0x36e:10" > /sys/class/ide_generic/add
 *
 * will add an interface using I/O ports 0x168-0x16f/0x36e and IRQ 10.
 */

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

#define DRV_NAME	"ide_generic"

static int probe_mask = 0x03;
module_param(probe_mask, int, 0);
MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");

static ssize_t store_add(struct class *cls, const char *buf, size_t n)
{
	ide_hwif_t *hwif;
	unsigned int base, ctl;
	int irq;
	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
	u8 idx[] = { 0xff, 0xff, 0xff, 0xff };

	if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
		return -EINVAL;

	hwif = ide_find_port();
	if (hwif == NULL)
		return -ENOENT;

	memset(&hw, 0, sizeof(hw));
	ide_std_init_ports(&hw, base, ctl);
	hw.irq = irq;
	hw.chipset = ide_generic;

	idx[0] = hwif->index;

	ide_device_add(idx, NULL, hws);

	return n;
};

static struct class_attribute ide_generic_class_attrs[] = {
	__ATTR(add, S_IWUSR, NULL, store_add),
	__ATTR_NULL
};

static void ide_generic_class_release(struct class *cls)
{
	kfree(cls);
}

static int __init ide_generic_sysfs_init(void)
{
	struct class *cls;
	int rc;

	cls = kzalloc(sizeof(*cls), GFP_KERNEL);
	if (!cls)
		return -ENOMEM;

	cls->name = DRV_NAME;
	cls->owner = THIS_MODULE;
	cls->class_release = ide_generic_class_release;
	cls->class_attrs = ide_generic_class_attrs;

	rc = class_register(cls);
	if (rc) {
		kfree(cls);
		return rc;
	}

	return 0;
}

static int __init ide_generic_init(void)
{
	hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
	u8 idx[MAX_HWIFS];
	int i;

	printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
			 "parameter for probing all legacy ISA IDE ports\n");

	for (i = 0; i < MAX_HWIFS; i++) {
		ide_hwif_t *hwif;
		unsigned long io_addr = ide_default_io_base(i);

		hws[i] = NULL;
		idx[i] = 0xff;

		if ((probe_mask & (1 << i)) && io_addr) {
			if (!request_region(io_addr, 8, DRV_NAME)) {
				printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
						"not free.\n",
						DRV_NAME, io_addr, io_addr + 7);
				continue;
			}

			if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
				printk(KERN_ERR "%s: I/O resource 0x%lX "
						"not free.\n",
						DRV_NAME, io_addr + 0x206);
				release_region(io_addr, 8);
				continue;
			}

			hwif = ide_find_port();
			if (hwif == NULL)
				continue;

			hwif->chipset = ide_generic;

			memset(&hw[i], 0, sizeof(hw[i]));
			ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206);
			hw[i].irq = ide_default_irq(io_addr);
			hw[i].chipset = ide_generic;

			hws[i] = &hw[i];
			idx[i] = i;
		}
	}

	ide_device_add_all(idx, NULL, hws);

	if (ide_generic_sysfs_init())
		printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
					 "class\n");

	return 0;
}

module_init(ide_generic_init);

MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* generic/default IDE host driver
	3	*
f0298512	4	* Copyright (C) 2004, 2008 Bartlomiej Zolnierkiewicz
1da177e4 LT	5	* This code was split off from ide.c. See it for original copyrights.
	6	*
	7	* May be copied or modified under the terms of the GNU General Public License.
	8	*/
	9
f0298512 BZ	10	/*
	11	* For special cases new interfaces may be added using sysfs, i.e.
	12	*
	13	* echo -n "0x168:0x36e:10" > /sys/class/ide_generic/add
	14	*
	15	* will add an interface using I/O ports 0x168-0x16f/0x36e and IRQ 10.
	16	*/
	17
1da177e4 LT	18	#include <linux/kernel.h>
	19	#include <linux/init.h>
	20	#include <linux/module.h>
	21	#include <linux/ide.h>
	22
f0298512 BZ	23	#define DRV_NAME "ide_generic"
f0298512 BZ	24
0cbccbc3 BZ	25	static int probe_mask = 0x03;
	26	module_param(probe_mask, int, 0);
	27	MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
	28
f0298512 BZ	29	static ssize_t store_add(struct class cls, const char buf, size_t n)
	30	{
	31	ide_hwif_t *hwif;
	32	unsigned int base, ctl;
	33	int irq;
c97c6aca	34	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
f0298512 BZ	35	u8 idx[] = { 0xff, 0xff, 0xff, 0xff };
	36
	37	if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
	38	return -EINVAL;
	39
59bff5ba	40	hwif = ide_find_port();
f0298512 BZ	41	if (hwif == NULL)
	42	return -ENOENT;
	43
	44	memset(&hw, 0, sizeof(hw));
	45	ide_std_init_ports(&hw, base, ctl);
	46	hw.irq = irq;
	47	hw.chipset = ide_generic;
	48
f0298512 BZ	49	idx[0] = hwif->index;
f0298512 BZ	50
c97c6aca	51	ide_device_add(idx, NULL, hws);
f0298512 BZ	52
	53	return n;
	54	};
	55
	56	static struct class_attribute ide_generic_class_attrs[] = {
	57	__ATTR(add, S_IWUSR, NULL, store_add),
	58	__ATTR_NULL
	59	};
	60
	61	static void ide_generic_class_release(struct class *cls)
	62	{
	63	kfree(cls);
	64	}
	65
	66	static int __init ide_generic_sysfs_init(void)
	67	{
	68	struct class *cls;
	69	int rc;
	70
	71	cls = kzalloc(sizeof(*cls), GFP_KERNEL);
	72	if (!cls)
	73	return -ENOMEM;
	74
	75	cls->name = DRV_NAME;
	76	cls->owner = THIS_MODULE;
	77	cls->class_release = ide_generic_class_release;
	78	cls->class_attrs = ide_generic_class_attrs;
	79
	80	rc = class_register(cls);
	81	if (rc) {
	82	kfree(cls);
	83	return rc;
	84	}
	85
	86	return 0;
	87	}
	88
1da177e4 LT	89	static int __init ide_generic_init(void)
1da177e4 LT	90	{
c97c6aca	91	hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
151575e4 BZ	92	u8 idx[MAX_HWIFS];
	93	int i;
	94
0cbccbc3 BZ	95	printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
	96	"parameter for probing all legacy ISA IDE ports\n");
	97
b2a53bc6	98	for (i = 0; i < MAX_HWIFS; i++) {
dc9114e2	99	ide_hwif_t *hwif;
486c92e2	100	unsigned long io_addr = ide_default_io_base(i);
486c92e2	101
c97c6aca	102	hws[i] = NULL;
16649498 BZ	103	idx[i] = 0xff;
16649498 BZ	104
0cbccbc3	105	if ((probe_mask & (1 << i)) && io_addr) {
16649498 BZ	106	if (!request_region(io_addr, 8, DRV_NAME)) {
	107	printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
	108	"not free.\n",
	109	DRV_NAME, io_addr, io_addr + 7);
	110	continue;
	111	}
	112
	113	if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
	114	printk(KERN_ERR "%s: I/O resource 0x%lX "
	115	"not free.\n",
	116	DRV_NAME, io_addr + 0x206);
	117	release_region(io_addr, 8);
	118	continue;
	119	}
	120
dc9114e2	121	hwif = ide_find_port();
edc74b24	122	if (hwif == NULL)
dc9114e2	123	continue;
dc9114e2	124
c97c6aca BZ	125	hwif->chipset = ide_generic;
	126
	127	memset(&hw[i], 0, sizeof(hw[i]));
	128	ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206);
	129	hw[i].irq = ide_default_irq(io_addr);
	130	hw[i].chipset = ide_generic;
b2a53bc6	131
c97c6aca	132	hws[i] = &hw[i];
b2a53bc6	133	idx[i] = i;
16649498	134	}
b2a53bc6	135	}
151575e4	136
c97c6aca	137	ide_device_add_all(idx, NULL, hws);
1da177e4	138
f0298512 BZ	139	if (ide_generic_sysfs_init())
	140	printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
	141	"class\n");
	142
1da177e4 LT	143	return 0;
	144	}
	145
	146	module_init(ide_generic_init);
	147
	148	MODULE_LICENSE("GPL");