[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>

/* FIXME: convert m32r to use ide_platform host driver */
#ifdef CONFIG_M32R
#include <asm/m32r.h>
#endif

#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)
{
	unsigned int base, ctl;
	int irq, rc;
	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;

	rc = ide_host_add(NULL, hws, NULL);
	if (rc)
		return rc;

	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;
}

#if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) \
	|| defined(CONFIG_PLAT_OPSPUT)
static const u16 legacy_bases[] = { 0x1f0 };
static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
#elif defined(CONFIG_PLAT_MAPPI3)
static const u16 legacy_bases[] = { 0x1f0, 0x170 };
static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
#elif defined(CONFIG_ALPHA)
static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
static const int legacy_irqs[]  = { 14, 15, 11, 10 };
#else
static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
#endif

static int __init ide_generic_init(void)
{
	hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
	struct ide_host *host;
	unsigned long io_addr;
	int i, rc;

#ifdef CONFIG_MIPS
	if (!ide_probe_legacy())
		return -ENODEV;
#endif
	printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
			 "parameter for probing all legacy ISA IDE ports\n");

	memset(hws, 0, sizeof(hw_regs_t *) * MAX_HWIFS);

	for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
		io_addr = legacy_bases[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);
#ifdef CONFIG_IA64
			hw[i].irq = isa_irq_to_vector(legacy_irqs[i]);
#else
			hw[i].irq = legacy_irqs[i];
#endif
			hw[i].chipset = ide_generic;

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

	host = ide_host_alloc_all(NULL, hws);
	if (host == NULL) {
		rc = -ENOMEM;
		goto err;
	}

	rc = ide_host_register(host, NULL, hws);
	if (rc)
		goto err_free;

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

	return 0;
err_free:
	ide_host_free(host);
err:
	for (i = 0; i < MAX_HWIFS; i++) {
		if (hws[i] == NULL)
			continue;

		io_addr = hws[i]->io_ports.data_addr;
		release_region(io_addr + 0x206, 1);
		release_region(io_addr, 8);
	}
	return rc;
}

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
f01d35d8 BZ	23	/* FIXME: convert m32r to use ide_platform host driver */
	24	#ifdef CONFIG_M32R
	25	#include <asm/m32r.h>
	26	#endif
	27
f0298512 BZ	28	#define DRV_NAME "ide_generic"
f0298512 BZ	29
0cbccbc3 BZ	30	static int probe_mask = 0x03;
	31	module_param(probe_mask, int, 0);
	32	MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
	33
f0298512 BZ	34	static ssize_t store_add(struct class cls, const char buf, size_t n)
f0298512 BZ	35	{
f0298512	36	unsigned int base, ctl;
6f904d01	37	int irq, rc;
c97c6aca	38	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
f0298512 BZ	39
	40	if (sscanf(buf, "%x:%x:%d", &base, &ctl, &irq) != 3)
	41	return -EINVAL;
	42
f0298512 BZ	43	memset(&hw, 0, sizeof(hw));
	44	ide_std_init_ports(&hw, base, ctl);
	45	hw.irq = irq;
	46	hw.chipset = ide_generic;
	47
6f904d01 BZ	48	rc = ide_host_add(NULL, hws, NULL);
	49	if (rc)
	50	return rc;
f0298512 BZ	51
	52	return n;
	53	};
	54
	55	static struct class_attribute ide_generic_class_attrs[] = {
	56	__ATTR(add, S_IWUSR, NULL, store_add),
	57	__ATTR_NULL
	58	};
	59
	60	static void ide_generic_class_release(struct class *cls)
	61	{
	62	kfree(cls);
	63	}
	64
	65	static int __init ide_generic_sysfs_init(void)
	66	{
	67	struct class *cls;
	68	int rc;
	69
	70	cls = kzalloc(sizeof(*cls), GFP_KERNEL);
	71	if (!cls)
	72	return -ENOMEM;
	73
	74	cls->name = DRV_NAME;
	75	cls->owner = THIS_MODULE;
	76	cls->class_release = ide_generic_class_release;
	77	cls->class_attrs = ide_generic_class_attrs;
	78
	79	rc = class_register(cls);
	80	if (rc) {
	81	kfree(cls);
	82	return rc;
	83	}
	84
	85	return 0;
	86	}
	87
f01d35d8 BZ	88	#if defined(CONFIG_PLAT_M32700UT) \|\| defined(CONFIG_PLAT_MAPPI2) \
	89	\|\| defined(CONFIG_PLAT_OPSPUT)
	90	static const u16 legacy_bases[] = { 0x1f0 };
	91	static const int legacy_irqs[] = { PLD_IRQ_CFIREQ };
	92	#elif defined(CONFIG_PLAT_MAPPI3)
	93	static const u16 legacy_bases[] = { 0x1f0, 0x170 };
	94	static const int legacy_irqs[] = { PLD_IRQ_CFIREQ, PLD_IRQ_IDEIREQ };
	95	#elif defined(CONFIG_ALPHA)
	96	static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
	97	static const int legacy_irqs[] = { 14, 15, 11, 10 };
	98	#else
	99	static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
	100	static const int legacy_irqs[] = { 14, 15, 11, 10, 8, 12 };
	101	#endif
	102
1da177e4 LT	103	static int __init ide_generic_init(void)
1da177e4 LT	104	{
c97c6aca	105	hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
48c3c107	106	struct ide_host *host;
8a69580e BZ	107	unsigned long io_addr;
8a69580e BZ	108	int i, rc;
151575e4	109
dbdec839 BZ	110	#ifdef CONFIG_MIPS
	111	if (!ide_probe_legacy())
	112	return -ENODEV;
	113	#endif
0cbccbc3 BZ	114	printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
	115	"parameter for probing all legacy ISA IDE ports\n");
	116
f01d35d8 BZ	117	memset(hws, 0, sizeof(hw_regs_t ) MAX_HWIFS);
	118
	119	for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
	120	io_addr = legacy_bases[i];
486c92e2	121
c97c6aca	122	hws[i] = NULL;
16649498	123
0cbccbc3	124	if ((probe_mask & (1 << i)) && io_addr) {
16649498 BZ	125	if (!request_region(io_addr, 8, DRV_NAME)) {
	126	printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
	127	"not free.\n",
	128	DRV_NAME, io_addr, io_addr + 7);
	129	continue;
	130	}
	131
	132	if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
	133	printk(KERN_ERR "%s: I/O resource 0x%lX "
	134	"not free.\n",
	135	DRV_NAME, io_addr + 0x206);
	136	release_region(io_addr, 8);
	137	continue;
	138	}
	139
c97c6aca BZ	140	memset(&hw[i], 0, sizeof(hw[i]));
c97c6aca BZ	141	ide_std_init_ports(&hw[i], io_addr, io_addr + 0x206);
f01d35d8 BZ	142	#ifdef CONFIG_IA64
	143	hw[i].irq = isa_irq_to_vector(legacy_irqs[i]);
	144	#else
	145	hw[i].irq = legacy_irqs[i];
	146	#endif
c97c6aca	147	hw[i].chipset = ide_generic;
b2a53bc6	148
c97c6aca	149	hws[i] = &hw[i];
16649498	150	}
b2a53bc6	151	}
151575e4	152
48c3c107	153	host = ide_host_alloc_all(NULL, hws);
8a69580e BZ	154	if (host == NULL) {
	155	rc = -ENOMEM;
	156	goto err;
	157	}
	158
	159	rc = ide_host_register(host, NULL, hws);
	160	if (rc)
	161	goto err_free;
1da177e4	162
f0298512 BZ	163	if (ide_generic_sysfs_init())
	164	printk(KERN_ERR DRV_NAME ": failed to create ide_generic "
	165	"class\n");
	166
1da177e4	167	return 0;
8a69580e BZ	168	err_free:
	169	ide_host_free(host);
	170	err:
	171	for (i = 0; i < MAX_HWIFS; i++) {
	172	if (hws[i] == NULL)
	173	continue;
	174
	175	io_addr = hws[i]->io_ports.data_addr;
	176	release_region(io_addr + 0x206, 1);
	177	release_region(io_addr, 8);
	178	}
	179	return rc;
1da177e4 LT	180	}
	181
	182	module_init(ide_generic_init);
	183
	184	MODULE_LICENSE("GPL");