[linux-2.6-block.git] / drivers / mtd / maps / physmap.c

/*
 * 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 <linux/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];
#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;

	if (info->cmtd) {
#ifdef CONFIG_MTD_PARTITIONS
		if (info->nr_parts || physmap_data->nr_parts)
			del_mtd_partitions(info->cmtd);
		else
			del_mtd_device(info->cmtd);
#else
		del_mtd_device(info->cmtd);
#endif
	}
#ifdef CONFIG_MTD_PARTITIONS
	if (info->nr_parts)
		kfree(info->parts);
#endif

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

	for (i = 0; i < MAX_RESOURCES; i++) {
		if (info->mtd[i] != NULL)
			map_destroy(info->mtd[i]);
	}
	return 0;
}

static const char *rom_probe_types[] = {
					"cfi_probe",
					"jedec_probe",
					"qinfo_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 = devm_kzalloc(&dev->dev, 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);

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

		info->map[i].name = dev_name(&dev->dev);
		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].pfow_base = physmap_data->pfow_base;

		info->map[i].virt = devm_ioremap(&dev->dev, 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;
		info->mtd[i]->dev.parent = &dev->dev;
	}

	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_name(&dev->dev));
		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);
		info->nr_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 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 && info->mtd[i]; i++)
		if (info->mtd[i]->suspend && info->mtd[i]->resume)
			if (info->mtd[i]->suspend(info->mtd[i]) == 0)
				info->mtd[i]->resume(info->mtd[i]);
}
#else
#define physmap_flash_shutdown NULL
#endif

static struct platform_driver physmap_flash_driver = {
	.probe		= physmap_flash_probe,
	.remove		= physmap_flash_remove,
	.shutdown	= physmap_flash_shutdown,
	.driver		= {
		.name	= "physmap-flash",
		.owner	= THIS_MODULE,
	},
};


#ifdef CONFIG_MTD_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 CONFIG_MTD_PHYSMAP_COMPAT
	if (err == 0)
		platform_device_register(&physmap_flash);
#endif

	return err;
}

static void __exit physmap_exit(void)
{
#ifdef CONFIG_MTD_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");

/* legacy platform drivers can't hotplug or coldplg */
#ifndef CONFIG_MTD_PHYSMAP_COMPAT
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:physmap-flash");
#endif
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Normal mappings of chips in physical memory
	3	*
	4	* Copyright (C) 2003 MontaVista Software Inc.
	5	* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
	6	*
	7	* 031022 - [jsun] add run-time configure and partition setup
	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/types.h>
	12	#include <linux/kernel.h>
	13	#include <linux/init.h>
	14	#include <linux/slab.h>
73566edf LB	15	#include <linux/device.h>
73566edf LB	16	#include <linux/platform_device.h>
1da177e4 LT	17	#include <linux/mtd/mtd.h>
1da177e4 LT	18	#include <linux/mtd/map.h>
1da177e4	19	#include <linux/mtd/partitions.h>
2b9175c1	20	#include <linux/mtd/physmap.h>
df66e716	21	#include <linux/mtd/concat.h>
3136e903	22	#include <linux/io.h>
1da177e4	23
df66e716 SR	24	#define MAX_RESOURCES 4
df66e716 SR	25
73566edf	26	struct physmap_flash_info {
df66e716 SR	27	struct mtd_info *mtd[MAX_RESOURCES];
	28	struct mtd_info *cmtd;
	29	struct map_info map[MAX_RESOURCES];
73566edf LB	30	#ifdef CONFIG_MTD_PARTITIONS
73566edf LB	31	int nr_parts;
e480814f	32	struct mtd_partition *parts;
73566edf	33	#endif
1da177e4 LT	34	};
1da177e4 LT	35
73566edf LB	36	static int physmap_flash_remove(struct platform_device *dev)
	37	{
	38	struct physmap_flash_info *info;
	39	struct physmap_flash_data *physmap_data;
df66e716	40	int i;
73566edf LB	41
	42	info = platform_get_drvdata(dev);
	43	if (info == NULL)
	44	return 0;
	45	platform_set_drvdata(dev, NULL);
	46
	47	physmap_data = dev->dev.platform_data;
	48
d58ab5cf	49	if (info->cmtd) {
e480814f	50	#ifdef CONFIG_MTD_PARTITIONS
d58ab5cf AN	51	if (info->nr_parts \|\| physmap_data->nr_parts)
	52	del_mtd_partitions(info->cmtd);
	53	else
	54	del_mtd_device(info->cmtd);
e480814f	55	#else
d58ab5cf AN	56	del_mtd_device(info->cmtd);
	57	#endif
	58	}
	59	#ifdef CONFIG_MTD_PARTITIONS
	60	if (info->nr_parts)
	61	kfree(info->parts);
e480814f AN	62	#endif
	63
	64	#ifdef CONFIG_MTD_CONCAT
	65	if (info->cmtd != info->mtd[0])
df66e716	66	mtd_concat_destroy(info->cmtd);
df66e716 SR	67	#endif
	68
	69	for (i = 0; i < MAX_RESOURCES; i++) {
e480814f	70	if (info->mtd[i] != NULL)
df66e716	71	map_destroy(info->mtd[i]);
73566edf	72	}
73566edf	73	return 0;
1da177e4	74	}
1da177e4	75
d8140830 AK	76	static const char *rom_probe_types[] = {
	77	"cfi_probe",
	78	"jedec_probe",
	79	"qinfo_probe",
	80	"map_rom",
	81	NULL };
73566edf LB	82	#ifdef CONFIG_MTD_PARTITIONS
	83	static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
	84	#endif
	85
	86	static int physmap_flash_probe(struct platform_device *dev)
1da177e4	87	{
73566edf LB	88	struct physmap_flash_data *physmap_data;
	89	struct physmap_flash_info *info;
	90	const char **probe_type;
df66e716 SR	91	int err = 0;
	92	int i;
	93	int devices_found = 0;
73566edf LB	94
	95	physmap_data = dev->dev.platform_data;
	96	if (physmap_data == NULL)
	97	return -ENODEV;
	98
3136e903 AN	99	info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info),
3136e903 AN	100	GFP_KERNEL);
73566edf LB	101	if (info == NULL) {
	102	err = -ENOMEM;
	103	goto err_out;
	104	}
1da177e4	105
73566edf	106	platform_set_drvdata(dev, info);
1da177e4	107
df66e716 SR	108	for (i = 0; i < dev->num_resources; i++) {
	109	printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
	110	(unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
	111	(unsigned long long)dev->resource[i].start);
	112
3136e903 AN	113	if (!devm_request_mem_region(&dev->dev,
	114	dev->resource[i].start,
	115	dev->resource[i].end - dev->resource[i].start + 1,
160bbab3	116	dev_name(&dev->dev))) {
df66e716 SR	117	dev_err(&dev->dev, "Could not reserve memory region\n");
	118	err = -ENOMEM;
	119	goto err_out;
	120	}
1da177e4	121
160bbab3	122	info->map[i].name = dev_name(&dev->dev);
df66e716 SR	123	info->map[i].phys = dev->resource[i].start;
	124	info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
	125	info->map[i].bankwidth = physmap_data->width;
	126	info->map[i].set_vpp = physmap_data->set_vpp;
d8140830	127	info->map[i].pfow_base = physmap_data->pfow_base;
df66e716	128
3136e903 AN	129	info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
3136e903 AN	130	info->map[i].size);
df66e716 SR	131	if (info->map[i].virt == NULL) {
	132	dev_err(&dev->dev, "Failed to ioremap flash region\n");
	133	err = EIO;
	134	goto err_out;
	135	}
73566edf	136
df66e716	137	simple_map_init(&info->map[i]);
1da177e4	138
df66e716 SR	139	probe_type = rom_probe_types;
	140	for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
	141	info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
	142	if (info->mtd[i] == NULL) {
	143	dev_err(&dev->dev, "map_probe failed\n");
	144	err = -ENXIO;
	145	goto err_out;
	146	} else {
	147	devices_found++;
	148	}
	149	info->mtd[i]->owner = THIS_MODULE;
87f39f04	150	info->mtd[i]->dev.parent = &dev->dev;
df66e716	151	}
73566edf	152
df66e716 SR	153	if (devices_found == 1) {
	154	info->cmtd = info->mtd[0];
	155	} else if (devices_found > 1) {
	156	/*
	157	* We detected multiple devices. Concatenate them together.
	158	*/
	159	#ifdef CONFIG_MTD_CONCAT
160bbab3	160	info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev));
df66e716 SR	161	if (info->cmtd == NULL)
	162	err = -ENXIO;
	163	#else
	164	printk(KERN_ERR "physmap-flash: multiple devices "
	165	"found but MTD concat support disabled.\n");
73566edf	166	err = -ENXIO;
df66e716	167	#endif
1da177e4	168	}
df66e716 SR	169	if (err)
df66e716 SR	170	goto err_out;
1da177e4 LT	171
1da177e4 LT	172	#ifdef CONFIG_MTD_PARTITIONS
e480814f AN	173	err = parse_mtd_partitions(info->cmtd, part_probe_types,
e480814f AN	174	&info->parts, 0);
73566edf	175	if (err > 0) {
e480814f AN	176	add_mtd_partitions(info->cmtd, info->parts, err);
e480814f AN	177	info->nr_parts = err;
73566edf LB	178	return 0;
73566edf LB	179	}
1da177e4	180
73566edf LB	181	if (physmap_data->nr_parts) {
73566edf LB	182	printk(KERN_NOTICE "Using physmap partition information\n");
df66e716 SR	183	add_mtd_partitions(info->cmtd, physmap_data->parts,
df66e716 SR	184	physmap_data->nr_parts);
73566edf LB	185	return 0;
	186	}
	187	#endif
	188
df66e716	189	add_mtd_device(info->cmtd);
73566edf LB	190	return 0;
	191
	192	err_out:
	193	physmap_flash_remove(dev);
	194	return err;
	195	}
	196
17c2dae3	197	#ifdef CONFIG_PM
17c2dae3 LB	198	static void physmap_flash_shutdown(struct platform_device *dev)
	199	{
	200	struct physmap_flash_info *info = platform_get_drvdata(dev);
df66e716 SR	201	int i;
df66e716 SR	202
4a5691c0	203	for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
7b249191 RJ	204	if (info->mtd[i]->suspend && info->mtd[i]->resume)
	205	if (info->mtd[i]->suspend(info->mtd[i]) == 0)
	206	info->mtd[i]->resume(info->mtd[i]);
17c2dae3	207	}
d5476689	208	#else
d5476689	209	#define physmap_flash_shutdown NULL
17c2dae3 LB	210	#endif
17c2dae3 LB	211
73566edf LB	212	static struct platform_driver physmap_flash_driver = {
	213	.probe = physmap_flash_probe,
	214	.remove = physmap_flash_remove,
17c2dae3	215	.shutdown = physmap_flash_shutdown,
73566edf LB	216	.driver = {
73566edf LB	217	.name = "physmap-flash",
41d867c9	218	.owner = THIS_MODULE,
73566edf LB	219	},
73566edf LB	220	};
1da177e4	221
1da177e4	222
dcb3e137	223	#ifdef CONFIG_MTD_PHYSMAP_COMPAT
73566edf LB	224	static struct physmap_flash_data physmap_flash_data = {
	225	.width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
	226	};
1da177e4	227
73566edf LB	228	static struct resource physmap_flash_resource = {
73566edf LB	229	.start = CONFIG_MTD_PHYSMAP_START,
6d4f8224	230	.end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
73566edf LB	231	.flags = IORESOURCE_MEM,
73566edf LB	232	};
1da177e4	233
73566edf LB	234	static struct platform_device physmap_flash = {
	235	.name = "physmap-flash",
	236	.id = 0,
	237	.dev = {
	238	.platform_data = &physmap_flash_data,
	239	},
	240	.num_resources = 1,
	241	.resource = &physmap_flash_resource,
	242	};
	243
	244	void physmap_configure(unsigned long addr, unsigned long size,
	245	int bankwidth, void (set_vpp)(struct map_info , int))
1da177e4	246	{
73566edf LB	247	physmap_flash_resource.start = addr;
	248	physmap_flash_resource.end = addr + size - 1;
	249	physmap_flash_data.width = bankwidth;
	250	physmap_flash_data.set_vpp = set_vpp;
	251	}
	252
1da177e4	253	#ifdef CONFIG_MTD_PARTITIONS
73566edf LB	254	void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
	255	{
	256	physmap_flash_data.nr_parts = num_parts;
	257	physmap_flash_data.parts = parts;
	258	}
	259	#endif
1da177e4	260	#endif
1da177e4	261
73566edf LB	262	static int __init physmap_init(void)
	263	{
	264	int err;
	265
	266	err = platform_driver_register(&physmap_flash_driver);
dcb3e137	267	#ifdef CONFIG_MTD_PHYSMAP_COMPAT
73566edf LB	268	if (err == 0)
	269	platform_device_register(&physmap_flash);
	270	#endif
	271
	272	return err;
1da177e4 LT	273	}
1da177e4 LT	274
73566edf LB	275	static void __exit physmap_exit(void)
73566edf LB	276	{
dcb3e137	277	#ifdef CONFIG_MTD_PHYSMAP_COMPAT
73566edf LB	278	platform_device_unregister(&physmap_flash);
	279	#endif
	280	platform_driver_unregister(&physmap_flash_driver);
	281	}
1da177e4	282
73566edf LB	283	module_init(physmap_init);
73566edf LB	284	module_exit(physmap_exit);
1da177e4 LT	285
	286	MODULE_LICENSE("GPL");
	287	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	288	MODULE_DESCRIPTION("Generic configurable MTD map driver");
41d867c9 KS	289
41d867c9 KS	290	/* legacy platform drivers can't hotplug or coldplg */
dcb3e137	291	#ifndef CONFIG_MTD_PHYSMAP_COMPAT
41d867c9 KS	292	/* work with hotplug and coldplug */
	293	MODULE_ALIAS("platform:physmap-flash");
	294	#endif