[deliverable/linux.git] / drivers / mtd / maps / physmap.c

/*
 * $Id: physmap.c,v 1.39 2005/11/29 14:49:36 gleixner Exp $
 *
 * Normal mappings of chips in physical memory
 *
 * Copyright (C) 2003 MontaVista Software Inc.
 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
 *
 * 031022 - [jsun] add run-time configure and partition setup
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/concat.h>
#include <asm/io.h>

#define MAX_RESOURCES		4

struct physmap_flash_info {
	struct mtd_info		*mtd[MAX_RESOURCES];
	struct mtd_info		*cmtd;
	struct map_info		map[MAX_RESOURCES];
	struct resource		*res;
#ifdef CONFIG_MTD_PARTITIONS
	int			nr_parts;
	struct mtd_partition	*parts;
#endif
};

static int physmap_flash_remove(struct platform_device *dev)
{
	struct physmap_flash_info *info;
	struct physmap_flash_data *physmap_data;
	int i;

	info = platform_get_drvdata(dev);
	if (info == NULL)
		return 0;
	platform_set_drvdata(dev, NULL);

	physmap_data = dev->dev.platform_data;

#ifdef CONFIG_MTD_CONCAT
	if (info->cmtd != info->mtd[0]) {
		del_mtd_device(info->cmtd);
		mtd_concat_destroy(info->cmtd);
	}
#endif

	for (i = 0; i < MAX_RESOURCES; i++) {
		if (info->mtd[i] != NULL) {
#ifdef CONFIG_MTD_PARTITIONS
			if (info->nr_parts) {
				del_mtd_partitions(info->mtd[i]);
				kfree(info->parts);
			} else if (physmap_data->nr_parts) {
				del_mtd_partitions(info->mtd[i]);
			} else {
				del_mtd_device(info->mtd[i]);
			}
#else
			del_mtd_device(info->mtd[i]);
#endif
			map_destroy(info->mtd[i]);
		}

		if (info->map[i].virt != NULL)
			iounmap(info->map[i].virt);
	}

	if (info->res != NULL) {
		release_resource(info->res);
		kfree(info->res);
	}

	return 0;
}

static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
#endif

static int physmap_flash_probe(struct platform_device *dev)
{
	struct physmap_flash_data *physmap_data;
	struct physmap_flash_info *info;
	const char **probe_type;
	int err = 0;
	int i;
	int devices_found = 0;

	physmap_data = dev->dev.platform_data;
	if (physmap_data == NULL)
		return -ENODEV;

	info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
	if (info == NULL) {
		err = -ENOMEM;
		goto err_out;
	}

	platform_set_drvdata(dev, info);

	for (i = 0; i < dev->num_resources; i++) {
		printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
		       (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
		       (unsigned long long)dev->resource[i].start);

		info->res = request_mem_region(dev->resource[i].start,
					       dev->resource[i].end - dev->resource[i].start + 1,
					       dev->dev.bus_id);
		if (info->res == NULL) {
			dev_err(&dev->dev, "Could not reserve memory region\n");
			err = -ENOMEM;
			goto err_out;
		}

		info->map[i].name = dev->dev.bus_id;
		info->map[i].phys = dev->resource[i].start;
		info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
		info->map[i].bankwidth = physmap_data->width;
		info->map[i].set_vpp = physmap_data->set_vpp;

		info->map[i].virt = ioremap(info->map[i].phys, info->map[i].size);
		if (info->map[i].virt == NULL) {
			dev_err(&dev->dev, "Failed to ioremap flash region\n");
			err = EIO;
			goto err_out;
		}

		simple_map_init(&info->map[i]);

		probe_type = rom_probe_types;
		for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
			info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
		if (info->mtd[i] == NULL) {
			dev_err(&dev->dev, "map_probe failed\n");
			err = -ENXIO;
			goto err_out;
		} else {
			devices_found++;
		}
		info->mtd[i]->owner = THIS_MODULE;
	}

	if (devices_found == 1) {
		info->cmtd = info->mtd[0];
	} else if (devices_found > 1) {
		/*
		 * We detected multiple devices. Concatenate them together.
		 */
#ifdef CONFIG_MTD_CONCAT
		info->cmtd = mtd_concat_create(info->mtd, devices_found, dev->dev.bus_id);
		if (info->cmtd == NULL)
			err = -ENXIO;
#else
		printk(KERN_ERR "physmap-flash: multiple devices "
		       "found but MTD concat support disabled.\n");
		err = -ENXIO;
#endif
	}
	if (err)
		goto err_out;

#ifdef CONFIG_MTD_PARTITIONS
	err = parse_mtd_partitions(info->cmtd, part_probe_types, &info->parts, 0);
	if (err > 0) {
		add_mtd_partitions(info->cmtd, info->parts, err);
		return 0;
	}

	if (physmap_data->nr_parts) {
		printk(KERN_NOTICE "Using physmap partition information\n");
		add_mtd_partitions(info->cmtd, physmap_data->parts,
				   physmap_data->nr_parts);
		return 0;
	}
#endif

	add_mtd_device(info->cmtd);
	return 0;

err_out:
	physmap_flash_remove(dev);
	return err;
}

#ifdef CONFIG_PM
static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
{
	struct physmap_flash_info *info = platform_get_drvdata(dev);
	int ret = 0;
	int i;

	if (info)
		for (i = 0; i < MAX_RESOURCES; i++)
			ret |= info->mtd[i].suspend(info->mtd[i]);

	return ret;
}

static int physmap_flash_resume(struct platform_device *dev)
{
	struct physmap_flash_info *info = platform_get_drvdata(dev);
	int i;

	if (info)
		for (i = 0; i < MAX_RESOURCES; i++)
			info->mtd[i].resume(info->mtd[i]);
	return 0;
}

static void physmap_flash_shutdown(struct platform_device *dev)
{
	struct physmap_flash_info *info = platform_get_drvdata(dev);
	int i;

	for (i = 0; i < MAX_RESOURCES; i++)
		if (info && info->mtd[i].suspend(info->mtd[i]) == 0)
			info->mtd[i].resume(info->mtd[i]);
}
#endif

static struct platform_driver physmap_flash_driver = {
	.probe		= physmap_flash_probe,
	.remove		= physmap_flash_remove,
#ifdef CONFIG_PM
	.suspend	= physmap_flash_suspend,
	.resume		= physmap_flash_resume,
	.shutdown	= physmap_flash_shutdown,
#endif
	.driver		= {
		.name	= "physmap-flash",
	},
};


#ifdef CONFIG_MTD_PHYSMAP_LEN
#if CONFIG_MTD_PHYSMAP_LEN != 0
#warning using PHYSMAP compat code
#define PHYSMAP_COMPAT
#endif
#endif

#ifdef PHYSMAP_COMPAT
static struct physmap_flash_data physmap_flash_data = {
	.width		= CONFIG_MTD_PHYSMAP_BANKWIDTH,
};

static struct resource physmap_flash_resource = {
	.start		= CONFIG_MTD_PHYSMAP_START,
	.end		= CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
	.flags		= IORESOURCE_MEM,
};

static struct platform_device physmap_flash = {
	.name		= "physmap-flash",
	.id		= 0,
	.dev		= {
		.platform_data	= &physmap_flash_data,
	},
	.num_resources	= 1,
	.resource	= &physmap_flash_resource,
};

void physmap_configure(unsigned long addr, unsigned long size,
		int bankwidth, void (*set_vpp)(struct map_info *, int))
{
	physmap_flash_resource.start = addr;
	physmap_flash_resource.end = addr + size - 1;
	physmap_flash_data.width = bankwidth;
	physmap_flash_data.set_vpp = set_vpp;
}

#ifdef CONFIG_MTD_PARTITIONS
void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
{
	physmap_flash_data.nr_parts = num_parts;
	physmap_flash_data.parts = parts;
}
#endif
#endif

static int __init physmap_init(void)
{
	int err;

	err = platform_driver_register(&physmap_flash_driver);
#ifdef PHYSMAP_COMPAT
	if (err == 0)
		platform_device_register(&physmap_flash);
#endif

	return err;
}

static void __exit physmap_exit(void)
{
#ifdef PHYSMAP_COMPAT
	platform_device_unregister(&physmap_flash);
#endif
	platform_driver_unregister(&physmap_flash_driver);
}

module_init(physmap_init);
module_exit(physmap_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");
Commit	Line	Data
1da177e4	1	/*
2b9175c1	2	* $Id: physmap.c,v 1.39 2005/11/29 14:49:36 gleixner Exp $
1da177e4 LT	3	*
	4	* Normal mappings of chips in physical memory
	5	*
	6	* Copyright (C) 2003 MontaVista Software Inc.
	7	* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
	8	*
	9	* 031022 - [jsun] add run-time configure and partition setup
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/types.h>
	14	#include <linux/kernel.h>
	15	#include <linux/init.h>
	16	#include <linux/slab.h>
73566edf LB	17	#include <linux/device.h>
73566edf LB	18	#include <linux/platform_device.h>
1da177e4 LT	19	#include <linux/mtd/mtd.h>
1da177e4 LT	20	#include <linux/mtd/map.h>
1da177e4	21	#include <linux/mtd/partitions.h>
2b9175c1	22	#include <linux/mtd/physmap.h>
df66e716	23	#include <linux/mtd/concat.h>
73566edf	24	#include <asm/io.h>
1da177e4	25
df66e716 SR	26	#define MAX_RESOURCES 4
df66e716 SR	27
73566edf	28	struct physmap_flash_info {
df66e716 SR	29	struct mtd_info *mtd[MAX_RESOURCES];
	30	struct mtd_info *cmtd;
	31	struct map_info map[MAX_RESOURCES];
73566edf LB	32	struct resource *res;
	33	#ifdef CONFIG_MTD_PARTITIONS
	34	int nr_parts;
	35	struct mtd_partition *parts;
	36	#endif
1da177e4 LT	37	};
1da177e4 LT	38
73566edf LB	39	static int physmap_flash_remove(struct platform_device *dev)
	40	{
	41	struct physmap_flash_info *info;
	42	struct physmap_flash_data *physmap_data;
df66e716	43	int i;
73566edf LB	44
	45	info = platform_get_drvdata(dev);
	46	if (info == NULL)
	47	return 0;
	48	platform_set_drvdata(dev, NULL);
	49
	50	physmap_data = dev->dev.platform_data;
	51
df66e716 SR	52	#ifdef CONFIG_MTD_CONCAT
	53	if (info->cmtd != info->mtd[0]) {
	54	del_mtd_device(info->cmtd);
	55	mtd_concat_destroy(info->cmtd);
	56	}
	57	#endif
	58
	59	for (i = 0; i < MAX_RESOURCES; i++) {
	60	if (info->mtd[i] != NULL) {
1da177e4	61	#ifdef CONFIG_MTD_PARTITIONS
df66e716 SR	62	if (info->nr_parts) {
	63	del_mtd_partitions(info->mtd[i]);
	64	kfree(info->parts);
	65	} else if (physmap_data->nr_parts) {
	66	del_mtd_partitions(info->mtd[i]);
	67	} else {
	68	del_mtd_device(info->mtd[i]);
	69	}
73566edf	70	#else
df66e716	71	del_mtd_device(info->mtd[i]);
73566edf	72	#endif
df66e716 SR	73	map_destroy(info->mtd[i]);
df66e716 SR	74	}
1da177e4	75
df66e716 SR	76	if (info->map[i].virt != NULL)
	77	iounmap(info->map[i].virt);
	78	}
1da177e4	79
73566edf LB	80	if (info->res != NULL) {
	81	release_resource(info->res);
	82	kfree(info->res);
	83	}
1da177e4	84
73566edf	85	return 0;
1da177e4	86	}
1da177e4	87
73566edf LB	88	static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
	89	#ifdef CONFIG_MTD_PARTITIONS
	90	static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
	91	#endif
	92
	93	static int physmap_flash_probe(struct platform_device *dev)
1da177e4	94	{
73566edf LB	95	struct physmap_flash_data *physmap_data;
	96	struct physmap_flash_info *info;
	97	const char **probe_type;
df66e716 SR	98	int err = 0;
	99	int i;
	100	int devices_found = 0;
73566edf LB	101
	102	physmap_data = dev->dev.platform_data;
	103	if (physmap_data == NULL)
	104	return -ENODEV;
	105
95b93a0c	106	info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
73566edf LB	107	if (info == NULL) {
	108	err = -ENOMEM;
	109	goto err_out;
	110	}
1da177e4	111
73566edf	112	platform_set_drvdata(dev, info);
1da177e4	113
df66e716 SR	114	for (i = 0; i < dev->num_resources; i++) {
	115	printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
	116	(unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
	117	(unsigned long long)dev->resource[i].start);
	118
	119	info->res = request_mem_region(dev->resource[i].start,
	120	dev->resource[i].end - dev->resource[i].start + 1,
	121	dev->dev.bus_id);
	122	if (info->res == NULL) {
	123	dev_err(&dev->dev, "Could not reserve memory region\n");
	124	err = -ENOMEM;
	125	goto err_out;
	126	}
1da177e4	127
df66e716 SR	128	info->map[i].name = dev->dev.bus_id;
	129	info->map[i].phys = dev->resource[i].start;
	130	info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
	131	info->map[i].bankwidth = physmap_data->width;
	132	info->map[i].set_vpp = physmap_data->set_vpp;
	133
	134	info->map[i].virt = ioremap(info->map[i].phys, info->map[i].size);
	135	if (info->map[i].virt == NULL) {
	136	dev_err(&dev->dev, "Failed to ioremap flash region\n");
	137	err = EIO;
	138	goto err_out;
	139	}
73566edf	140
df66e716	141	simple_map_init(&info->map[i]);
1da177e4	142
df66e716 SR	143	probe_type = rom_probe_types;
	144	for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
	145	info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
	146	if (info->mtd[i] == NULL) {
	147	dev_err(&dev->dev, "map_probe failed\n");
	148	err = -ENXIO;
	149	goto err_out;
	150	} else {
	151	devices_found++;
	152	}
	153	info->mtd[i]->owner = THIS_MODULE;
	154	}
73566edf	155
df66e716 SR	156	if (devices_found == 1) {
	157	info->cmtd = info->mtd[0];
	158	} else if (devices_found > 1) {
	159	/*
	160	* We detected multiple devices. Concatenate them together.
	161	*/
	162	#ifdef CONFIG_MTD_CONCAT
	163	info->cmtd = mtd_concat_create(info->mtd, devices_found, dev->dev.bus_id);
	164	if (info->cmtd == NULL)
	165	err = -ENXIO;
	166	#else
	167	printk(KERN_ERR "physmap-flash: multiple devices "
	168	"found but MTD concat support disabled.\n");
73566edf	169	err = -ENXIO;
df66e716	170	#endif
1da177e4	171	}
df66e716 SR	172	if (err)
df66e716 SR	173	goto err_out;
1da177e4 LT	174
1da177e4 LT	175	#ifdef CONFIG_MTD_PARTITIONS
df66e716	176	err = parse_mtd_partitions(info->cmtd, part_probe_types, &info->parts, 0);
73566edf	177	if (err > 0) {
df66e716	178	add_mtd_partitions(info->cmtd, info->parts, err);
73566edf LB	179	return 0;
73566edf LB	180	}
1da177e4	181
73566edf LB	182	if (physmap_data->nr_parts) {
73566edf LB	183	printk(KERN_NOTICE "Using physmap partition information\n");
df66e716 SR	184	add_mtd_partitions(info->cmtd, physmap_data->parts,
df66e716 SR	185	physmap_data->nr_parts);
73566edf LB	186	return 0;
	187	}
	188	#endif
	189
df66e716	190	add_mtd_device(info->cmtd);
73566edf LB	191	return 0;
	192
	193	err_out:
	194	physmap_flash_remove(dev);
	195	return err;
	196	}
	197
17c2dae3 LB	198	#ifdef CONFIG_PM
	199	static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
	200	{
	201	struct physmap_flash_info *info = platform_get_drvdata(dev);
	202	int ret = 0;
df66e716	203	int i;
17c2dae3 LB	204
17c2dae3 LB	205	if (info)
df66e716 SR	206	for (i = 0; i < MAX_RESOURCES; i++)
df66e716 SR	207	ret \|= info->mtd[i].suspend(info->mtd[i]);
17c2dae3 LB	208
	209	return ret;
	210	}
	211
	212	static int physmap_flash_resume(struct platform_device *dev)
	213	{
	214	struct physmap_flash_info *info = platform_get_drvdata(dev);
df66e716 SR	215	int i;
df66e716 SR	216
17c2dae3	217	if (info)
df66e716 SR	218	for (i = 0; i < MAX_RESOURCES; i++)
df66e716 SR	219	info->mtd[i].resume(info->mtd[i]);
17c2dae3 LB	220	return 0;
	221	}
	222
	223	static void physmap_flash_shutdown(struct platform_device *dev)
	224	{
	225	struct physmap_flash_info *info = platform_get_drvdata(dev);
df66e716 SR	226	int i;
	227
	228	for (i = 0; i < MAX_RESOURCES; i++)
	229	if (info && info->mtd[i].suspend(info->mtd[i]) == 0)
	230	info->mtd[i].resume(info->mtd[i]);
17c2dae3 LB	231	}
	232	#endif
	233
73566edf LB	234	static struct platform_driver physmap_flash_driver = {
	235	.probe = physmap_flash_probe,
	236	.remove = physmap_flash_remove,
17c2dae3 LB	237	#ifdef CONFIG_PM
	238	.suspend = physmap_flash_suspend,
	239	.resume = physmap_flash_resume,
	240	.shutdown = physmap_flash_shutdown,
	241	#endif
73566edf LB	242	.driver = {
	243	.name = "physmap-flash",
	244	},
	245	};
1da177e4	246
1da177e4	247
73566edf LB	248	#ifdef CONFIG_MTD_PHYSMAP_LEN
	249	#if CONFIG_MTD_PHYSMAP_LEN != 0
	250	#warning using PHYSMAP compat code
	251	#define PHYSMAP_COMPAT
	252	#endif
1da177e4	253	#endif
1da177e4	254
73566edf LB	255	#ifdef PHYSMAP_COMPAT
	256	static struct physmap_flash_data physmap_flash_data = {
	257	.width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
	258	};
1da177e4	259
73566edf LB	260	static struct resource physmap_flash_resource = {
73566edf LB	261	.start = CONFIG_MTD_PHYSMAP_START,
6d4f8224	262	.end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
73566edf LB	263	.flags = IORESOURCE_MEM,
73566edf LB	264	};
1da177e4	265
73566edf LB	266	static struct platform_device physmap_flash = {
	267	.name = "physmap-flash",
	268	.id = 0,
	269	.dev = {
	270	.platform_data = &physmap_flash_data,
	271	},
	272	.num_resources = 1,
	273	.resource = &physmap_flash_resource,
	274	};
	275
	276	void physmap_configure(unsigned long addr, unsigned long size,
	277	int bankwidth, void (set_vpp)(struct map_info , int))
1da177e4	278	{
73566edf LB	279	physmap_flash_resource.start = addr;
	280	physmap_flash_resource.end = addr + size - 1;
	281	physmap_flash_data.width = bankwidth;
	282	physmap_flash_data.set_vpp = set_vpp;
	283	}
	284
1da177e4	285	#ifdef CONFIG_MTD_PARTITIONS
73566edf LB	286	void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
	287	{
	288	physmap_flash_data.nr_parts = num_parts;
	289	physmap_flash_data.parts = parts;
	290	}
	291	#endif
1da177e4	292	#endif
1da177e4	293
73566edf LB	294	static int __init physmap_init(void)
	295	{
	296	int err;
	297
	298	err = platform_driver_register(&physmap_flash_driver);
	299	#ifdef PHYSMAP_COMPAT
	300	if (err == 0)
	301	platform_device_register(&physmap_flash);
	302	#endif
	303
	304	return err;
1da177e4 LT	305	}
1da177e4 LT	306
73566edf LB	307	static void __exit physmap_exit(void)
	308	{
	309	#ifdef PHYSMAP_COMPAT
	310	platform_device_unregister(&physmap_flash);
	311	#endif
	312	platform_driver_unregister(&physmap_flash_driver);
	313	}
1da177e4	314
73566edf LB	315	module_init(physmap_init);
73566edf LB	316	module_exit(physmap_exit);
1da177e4 LT	317
	318	MODULE_LICENSE("GPL");
	319	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	320	MODULE_DESCRIPTION("Generic configurable MTD map driver");