[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 <asm/io.h>

struct physmap_flash_info {
	struct mtd_info		*mtd;
	struct map_info		map;
	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;

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

	physmap_data = dev->dev.platform_data;

	if (info->mtd != NULL) {
#ifdef CONFIG_MTD_PARTITIONS
		if (info->nr_parts) {
			del_mtd_partitions(info->mtd);
			kfree(info->parts);
		} else if (physmap_data->nr_parts) {
			del_mtd_partitions(info->mtd);
		} else {
			del_mtd_device(info->mtd);
		}
#else
		del_mtd_device(info->mtd);
#endif
		map_destroy(info->mtd);
	}

	if (info->map.virt != NULL)
		iounmap(info->map.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;

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

       	printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
	    (unsigned long long)dev->resource->end - dev->resource->start + 1,
	    (unsigned long long)dev->resource->start);

	info = kmalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
	if (info == NULL) {
		err = -ENOMEM;
		goto err_out;
	}
	memset(info, 0, sizeof(*info));

	platform_set_drvdata(dev, info);

	info->res = request_mem_region(dev->resource->start,
			dev->resource->end - dev->resource->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.name = dev->dev.bus_id;
	info->map.phys = dev->resource->start;
	info->map.size = dev->resource->end - dev->resource->start + 1;
	info->map.bankwidth = physmap_data->width;
	info->map.set_vpp = physmap_data->set_vpp;

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

	simple_map_init(&info->map);

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

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

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

	add_mtd_device(info->mtd);
	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;

	if (info)
		ret = info->mtd->suspend(info->mtd);

	return ret;
}

static int physmap_flash_resume(struct platform_device *dev)
{
	struct physmap_flash_info *info = platform_get_drvdata(dev);
	if (info)
		info->mtd->resume(info->mtd);
	return 0;
}

static void physmap_flash_shutdown(struct platform_device *dev)
{
	struct physmap_flash_info *info = platform_get_drvdata(dev);
	if (info && info->mtd->suspend(info->mtd) == 0)
		info->mtd->resume(info->mtd);
}
#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>
73566edf	23	#include <asm/io.h>
1da177e4	24
73566edf LB	25	struct physmap_flash_info {
	26	struct mtd_info *mtd;
	27	struct map_info map;
	28	struct resource *res;
	29	#ifdef CONFIG_MTD_PARTITIONS
	30	int nr_parts;
	31	struct mtd_partition *parts;
	32	#endif
1da177e4 LT	33	};
1da177e4 LT	34
73566edf LB	35
	36	static int physmap_flash_remove(struct platform_device *dev)
	37	{
	38	struct physmap_flash_info *info;
	39	struct physmap_flash_data *physmap_data;
	40
	41	info = platform_get_drvdata(dev);
	42	if (info == NULL)
	43	return 0;
	44	platform_set_drvdata(dev, NULL);
	45
	46	physmap_data = dev->dev.platform_data;
	47
	48	if (info->mtd != NULL) {
1da177e4	49	#ifdef CONFIG_MTD_PARTITIONS
73566edf LB	50	if (info->nr_parts) {
	51	del_mtd_partitions(info->mtd);
	52	kfree(info->parts);
	53	} else if (physmap_data->nr_parts) {
	54	del_mtd_partitions(info->mtd);
	55	} else {
	56	del_mtd_device(info->mtd);
	57	}
	58	#else
	59	del_mtd_device(info->mtd);
	60	#endif
	61	map_destroy(info->mtd);
	62	}
1da177e4	63
73566edf	64	if (info->map.virt != NULL)
afc12d30	65	iounmap(info->map.virt);
1da177e4	66
73566edf LB	67	if (info->res != NULL) {
	68	release_resource(info->res);
	69	kfree(info->res);
	70	}
1da177e4	71
73566edf	72	return 0;
1da177e4	73	}
1da177e4	74
73566edf LB	75	static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
	76	#ifdef CONFIG_MTD_PARTITIONS
	77	static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
	78	#endif
	79
	80	static int physmap_flash_probe(struct platform_device *dev)
1da177e4	81	{
73566edf LB	82	struct physmap_flash_data *physmap_data;
	83	struct physmap_flash_info *info;
	84	const char **probe_type;
	85	int err;
	86
	87	physmap_data = dev->dev.platform_data;
	88	if (physmap_data == NULL)
	89	return -ENODEV;
	90
f24ff6bf AM	91	printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
	92	(unsigned long long)dev->resource->end - dev->resource->start + 1,
	93	(unsigned long long)dev->resource->start);
73566edf LB	94
	95	info = kmalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
	96	if (info == NULL) {
	97	err = -ENOMEM;
	98	goto err_out;
	99	}
	100	memset(info, 0, sizeof(*info));
1da177e4	101
73566edf	102	platform_set_drvdata(dev, info);
1da177e4	103
73566edf LB	104	info->res = request_mem_region(dev->resource->start,
	105	dev->resource->end - dev->resource->start + 1,
	106	dev->dev.bus_id);
	107	if (info->res == NULL) {
	108	dev_err(&dev->dev, "Could not reserve memory region\n");
	109	err = -ENOMEM;
	110	goto err_out;
1da177e4 LT	111	}
1da177e4 LT	112
73566edf LB	113	info->map.name = dev->dev.bus_id;
	114	info->map.phys = dev->resource->start;
	115	info->map.size = dev->resource->end - dev->resource->start + 1;
	116	info->map.bankwidth = physmap_data->width;
	117	info->map.set_vpp = physmap_data->set_vpp;
	118
	119	info->map.virt = ioremap(info->map.phys, info->map.size);
	120	if (info->map.virt == NULL) {
	121	dev_err(&dev->dev, "Failed to ioremap flash region\n");
	122	err = EIO;
	123	goto err_out;
	124	}
1da177e4	125
73566edf LB	126	simple_map_init(&info->map);
	127
	128	probe_type = rom_probe_types;
	129	for (; info->mtd == NULL && *probe_type != NULL; probe_type++)
	130	info->mtd = do_map_probe(*probe_type, &info->map);
	131	if (info->mtd == NULL) {
	132	dev_err(&dev->dev, "map_probe failed\n");
	133	err = -ENXIO;
	134	goto err_out;
1da177e4	135	}
73566edf	136	info->mtd->owner = THIS_MODULE;
1da177e4 LT	137
1da177e4 LT	138	#ifdef CONFIG_MTD_PARTITIONS
73566edf LB	139	err = parse_mtd_partitions(info->mtd, part_probe_types, &info->parts, 0);
	140	if (err > 0) {
	141	add_mtd_partitions(info->mtd, info->parts, err);
	142	return 0;
	143	}
1da177e4	144
73566edf LB	145	if (physmap_data->nr_parts) {
	146	printk(KERN_NOTICE "Using physmap partition information\n");
	147	add_mtd_partitions(info->mtd, physmap_data->parts,
	148	physmap_data->nr_parts);
	149	return 0;
	150	}
	151	#endif
	152
	153	add_mtd_device(info->mtd);
	154	return 0;
	155
	156	err_out:
	157	physmap_flash_remove(dev);
	158	return err;
	159	}
	160
17c2dae3 LB	161	#ifdef CONFIG_PM
	162	static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
	163	{
	164	struct physmap_flash_info *info = platform_get_drvdata(dev);
	165	int ret = 0;
	166
	167	if (info)
	168	ret = info->mtd->suspend(info->mtd);
	169
	170	return ret;
	171	}
	172
	173	static int physmap_flash_resume(struct platform_device *dev)
	174	{
	175	struct physmap_flash_info *info = platform_get_drvdata(dev);
	176	if (info)
	177	info->mtd->resume(info->mtd);
	178	return 0;
	179	}
	180
	181	static void physmap_flash_shutdown(struct platform_device *dev)
	182	{
	183	struct physmap_flash_info *info = platform_get_drvdata(dev);
	184	if (info && info->mtd->suspend(info->mtd) == 0)
	185	info->mtd->resume(info->mtd);
	186	}
	187	#endif
	188
73566edf LB	189	static struct platform_driver physmap_flash_driver = {
	190	.probe = physmap_flash_probe,
	191	.remove = physmap_flash_remove,
17c2dae3 LB	192	#ifdef CONFIG_PM
	193	.suspend = physmap_flash_suspend,
	194	.resume = physmap_flash_resume,
	195	.shutdown = physmap_flash_shutdown,
	196	#endif
73566edf LB	197	.driver = {
	198	.name = "physmap-flash",
	199	},
	200	};
1da177e4	201
1da177e4	202
73566edf LB	203	#ifdef CONFIG_MTD_PHYSMAP_LEN
	204	#if CONFIG_MTD_PHYSMAP_LEN != 0
	205	#warning using PHYSMAP compat code
	206	#define PHYSMAP_COMPAT
	207	#endif
1da177e4	208	#endif
1da177e4	209
73566edf LB	210	#ifdef PHYSMAP_COMPAT
	211	static struct physmap_flash_data physmap_flash_data = {
	212	.width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
	213	};
1da177e4	214
73566edf LB	215	static struct resource physmap_flash_resource = {
73566edf LB	216	.start = CONFIG_MTD_PHYSMAP_START,
6d4f8224	217	.end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
73566edf LB	218	.flags = IORESOURCE_MEM,
73566edf LB	219	};
1da177e4	220
73566edf LB	221	static struct platform_device physmap_flash = {
	222	.name = "physmap-flash",
	223	.id = 0,
	224	.dev = {
	225	.platform_data = &physmap_flash_data,
	226	},
	227	.num_resources = 1,
	228	.resource = &physmap_flash_resource,
	229	};
	230
	231	void physmap_configure(unsigned long addr, unsigned long size,
	232	int bankwidth, void (set_vpp)(struct map_info , int))
1da177e4	233	{
73566edf LB	234	physmap_flash_resource.start = addr;
	235	physmap_flash_resource.end = addr + size - 1;
	236	physmap_flash_data.width = bankwidth;
	237	physmap_flash_data.set_vpp = set_vpp;
	238	}
	239
1da177e4	240	#ifdef CONFIG_MTD_PARTITIONS
73566edf LB	241	void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
	242	{
	243	physmap_flash_data.nr_parts = num_parts;
	244	physmap_flash_data.parts = parts;
	245	}
	246	#endif
1da177e4	247	#endif
1da177e4	248
73566edf LB	249	static int __init physmap_init(void)
	250	{
	251	int err;
	252
	253	err = platform_driver_register(&physmap_flash_driver);
	254	#ifdef PHYSMAP_COMPAT
	255	if (err == 0)
	256	platform_device_register(&physmap_flash);
	257	#endif
	258
	259	return err;
1da177e4 LT	260	}
1da177e4 LT	261
73566edf LB	262	static void __exit physmap_exit(void)
	263	{
	264	#ifdef PHYSMAP_COMPAT
	265	platform_device_unregister(&physmap_flash);
	266	#endif
	267	platform_driver_unregister(&physmap_flash_driver);
	268	}
1da177e4	269
73566edf LB	270	module_init(physmap_init);
73566edf LB	271	module_exit(physmap_exit);
1da177e4 LT	272
	273	MODULE_LICENSE("GPL");
	274	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	275	MODULE_DESCRIPTION("Generic configurable MTD map driver");