[deliverable/linux.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 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;
	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;

	ide_init_port_hw(hwif, &hw);

	idx[0] = hwif->index;

	ide_device_add(idx, NULL);

	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)
{
	u8 idx[MAX_HWIFS];
	int i;

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

		idx[i] = 0xff;

		if (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;
			}

			/*
			 * Skip probing if the corresponding
			 * slot is already occupied.
			 */
			hwif = ide_find_port();
			if (hwif == NULL || hwif->index != i) {
				idx[i] = 0xff;
				continue;
			}

			memset(&hw, 0, sizeof(hw));
			ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
			hw.irq = ide_default_irq(io_addr);
			ide_init_port_hw(hwif, &hw);

			idx[i] = i;
		}
	}

	ide_device_add_all(idx, NULL);

	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"
	24
	25	static ssize_t store_add(struct class cls, const char buf, size_t n)
	26	{
	27	ide_hwif_t *hwif;
	28	unsigned int base, ctl;
	29	int irq;
	30	hw_regs_t hw;
	31	u8 idx[] = { 0xff, 0xff, 0xff, 0xff };
	32
	33	if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
	34	return -EINVAL;
	35
59bff5ba	36	hwif = ide_find_port();
f0298512 BZ	37	if (hwif == NULL)
	38	return -ENOENT;
	39
	40	memset(&hw, 0, sizeof(hw));
	41	ide_std_init_ports(&hw, base, ctl);
	42	hw.irq = irq;
	43	hw.chipset = ide_generic;
	44
	45	ide_init_port_hw(hwif, &hw);
	46
	47	idx[0] = hwif->index;
	48
	49	ide_device_add(idx, NULL);
	50
	51	return n;
	52	};
	53
	54	static struct class_attribute ide_generic_class_attrs[] = {
	55	__ATTR(add, S_IWUSR, NULL, store_add),
	56	__ATTR_NULL
	57	};
	58
	59	static void ide_generic_class_release(struct class *cls)
	60	{
	61	kfree(cls);
	62	}
	63
	64	static int __init ide_generic_sysfs_init(void)
	65	{
	66	struct class *cls;
	67	int rc;
	68
	69	cls = kzalloc(sizeof(*cls), GFP_KERNEL);
	70	if (!cls)
	71	return -ENOMEM;
	72
	73	cls->name = DRV_NAME;
	74	cls->owner = THIS_MODULE;
	75	cls->class_release = ide_generic_class_release;
	76	cls->class_attrs = ide_generic_class_attrs;
	77
	78	rc = class_register(cls);
	79	if (rc) {
	80	kfree(cls);
	81	return rc;
	82	}
	83
	84	return 0;
	85	}
	86
1da177e4 LT	87	static int __init ide_generic_init(void)
1da177e4 LT	88	{
151575e4 BZ	89	u8 idx[MAX_HWIFS];
	90	int i;
	91
b2a53bc6	92	for (i = 0; i < MAX_HWIFS; i++) {
dc9114e2	93	ide_hwif_t *hwif;
486c92e2 BZ	94	unsigned long io_addr = ide_default_io_base(i);
	95	hw_regs_t hw;
	96
16649498 BZ	97	idx[i] = 0xff;
16649498 BZ	98
dc9114e2	99	if (io_addr) {
16649498 BZ	100	if (!request_region(io_addr, 8, DRV_NAME)) {
	101	printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
	102	"not free.\n",
	103	DRV_NAME, io_addr, io_addr + 7);
	104	continue;
	105	}
	106
	107	if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
	108	printk(KERN_ERR "%s: I/O resource 0x%lX "
	109	"not free.\n",
	110	DRV_NAME, io_addr + 0x206);
	111	release_region(io_addr, 8);
	112	continue;
	113	}
	114
dc9114e2 BZ	115	/*
	116	* Skip probing if the corresponding
	117	* slot is already occupied.
	118	*/
	119	hwif = ide_find_port();
	120	if (hwif == NULL \|\| hwif->index != i) {
	121	idx[i] = 0xff;
	122	continue;
	123	}
	124
486c92e2 BZ	125	memset(&hw, 0, sizeof(hw));
486c92e2 BZ	126	ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
273b8385	127	hw.irq = ide_default_irq(io_addr);
486c92e2	128	ide_init_port_hw(hwif, &hw);
b2a53bc6	129
b2a53bc6	130	idx[i] = i;
16649498	131	}
b2a53bc6	132	}
151575e4	133
c413b9b9	134	ide_device_add_all(idx, NULL);
1da177e4	135
f0298512 BZ	136	if (ide_generic_sysfs_init())
	137	printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
	138	"class\n");
	139
1da177e4 LT	140	return 0;
	141	}
	142
	143	module_init(ide_generic_init);
	144
	145	MODULE_LICENSE("GPL");