[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 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)
{
	struct ide_host *host;
	unsigned int base, ctl;
	int irq;
	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };

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

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

	host = ide_host_alloc(NULL, hws);
	if (host == NULL)
		return -ENOENT;

	ide_host_register(host, 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];
	struct ide_host *host;
	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++) {
		unsigned long io_addr = ide_default_io_base(i);

		hws[i] = NULL;

		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;
			}

			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];
		}
	}

	host = ide_host_alloc_all(NULL, hws);
	if (host)
		ide_host_register(host, 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)
f0298512 BZ	30	{
48c3c107	31	struct ide_host *host;
f0298512 BZ	32	unsigned int base, ctl;
f0298512 BZ	33	int irq;
c97c6aca	34	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
f0298512 BZ	35
	36	if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
	37	return -EINVAL;
	38
f0298512 BZ	39	memset(&hw, 0, sizeof(hw));
	40	ide_std_init_ports(&hw, base, ctl);
	41	hw.irq = irq;
	42	hw.chipset = ide_generic;
	43
48c3c107 BZ	44	host = ide_host_alloc(NULL, hws);
	45	if (host == NULL)
	46	return -ENOENT;
f0298512	47
48c3c107	48	ide_host_register(host, NULL, hws);
f0298512 BZ	49
	50	return n;
	51	};
	52
	53	static struct class_attribute ide_generic_class_attrs[] = {
	54	__ATTR(add, S_IWUSR, NULL, store_add),
	55	__ATTR_NULL
	56	};
	57
	58	static void ide_generic_class_release(struct class *cls)
	59	{
	60	kfree(cls);
	61	}
	62
	63	static int __init ide_generic_sysfs_init(void)
	64	{
	65	struct class *cls;
	66	int rc;
	67
	68	cls = kzalloc(sizeof(*cls), GFP_KERNEL);
	69	if (!cls)
	70	return -ENOMEM;
	71
	72	cls->name = DRV_NAME;
	73	cls->owner = THIS_MODULE;
	74	cls->class_release = ide_generic_class_release;
	75	cls->class_attrs = ide_generic_class_attrs;
	76
	77	rc = class_register(cls);
	78	if (rc) {
	79	kfree(cls);
	80	return rc;
	81	}
	82
	83	return 0;
	84	}
	85
1da177e4 LT	86	static int __init ide_generic_init(void)
1da177e4 LT	87	{
c97c6aca	88	hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
48c3c107	89	struct ide_host *host;
151575e4 BZ	90	int i;
151575e4 BZ	91
0cbccbc3 BZ	92	printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
	93	"parameter for probing all legacy ISA IDE ports\n");
	94
b2a53bc6	95	for (i = 0; i < MAX_HWIFS; i++) {
486c92e2	96	unsigned long io_addr = ide_default_io_base(i);
486c92e2	97
c97c6aca	98	hws[i] = NULL;
16649498	99
0cbccbc3	100	if ((probe_mask & (1 << i)) && io_addr) {
16649498 BZ	101	if (!request_region(io_addr, 8, DRV_NAME)) {
	102	printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
	103	"not free.\n",
	104	DRV_NAME, io_addr, io_addr + 7);
	105	continue;
	106	}
	107
	108	if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
	109	printk(KERN_ERR "%s: I/O resource 0x%lX "
	110	"not free.\n",
	111	DRV_NAME, io_addr + 0x206);
	112	release_region(io_addr, 8);
	113	continue;
	114	}
	115
c97c6aca BZ	116	memset(&hw[i], 0, sizeof(hw[i]));
	117	ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206);
	118	hw[i].irq = ide_default_irq(io_addr);
	119	hw[i].chipset = ide_generic;
b2a53bc6	120
c97c6aca	121	hws[i] = &hw[i];
16649498	122	}
b2a53bc6	123	}
151575e4	124
48c3c107 BZ	125	host = ide_host_alloc_all(NULL, hws);
	126	if (host)
	127	ide_host_register(host, NULL, hws);
1da177e4	128
f0298512 BZ	129	if (ide_generic_sysfs_init())
	130	printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
	131	"class\n");
	132
1da177e4 LT	133	return 0;
	134	}
	135
	136	module_init(ide_generic_init);
	137
	138	MODULE_LICENSE("GPL");