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

	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	91	printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
998a43e7	92	(unsigned long long)(dev->resource->end - dev->resource->start + 1),
f24ff6bf	93	(unsigned long long)dev->resource->start);
73566edf	94
95b93a0c	95	info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
73566edf LB	96	if (info == NULL) {
	97	err = -ENOMEM;
	98	goto err_out;
	99	}
1da177e4	100
73566edf	101	platform_set_drvdata(dev, info);
1da177e4	102
73566edf LB	103	info->res = request_mem_region(dev->resource->start,
	104	dev->resource->end - dev->resource->start + 1,
	105	dev->dev.bus_id);
	106	if (info->res == NULL) {
	107	dev_err(&dev->dev, "Could not reserve memory region\n");
	108	err = -ENOMEM;
	109	goto err_out;
1da177e4 LT	110	}
1da177e4 LT	111
73566edf LB	112	info->map.name = dev->dev.bus_id;
	113	info->map.phys = dev->resource->start;
	114	info->map.size = dev->resource->end - dev->resource->start + 1;
	115	info->map.bankwidth = physmap_data->width;
	116	info->map.set_vpp = physmap_data->set_vpp;
	117
	118	info->map.virt = ioremap(info->map.phys, info->map.size);
	119	if (info->map.virt == NULL) {
	120	dev_err(&dev->dev, "Failed to ioremap flash region\n");
	121	err = EIO;
	122	goto err_out;
	123	}
1da177e4	124
73566edf LB	125	simple_map_init(&info->map);
	126
	127	probe_type = rom_probe_types;
	128	for (; info->mtd == NULL && *probe_type != NULL; probe_type++)
	129	info->mtd = do_map_probe(*probe_type, &info->map);
	130	if (info->mtd == NULL) {
	131	dev_err(&dev->dev, "map_probe failed\n");
	132	err = -ENXIO;
	133	goto err_out;
1da177e4	134	}
73566edf	135	info->mtd->owner = THIS_MODULE;
1da177e4 LT	136
1da177e4 LT	137	#ifdef CONFIG_MTD_PARTITIONS
73566edf LB	138	err = parse_mtd_partitions(info->mtd, part_probe_types, &info->parts, 0);
	139	if (err > 0) {
	140	add_mtd_partitions(info->mtd, info->parts, err);
	141	return 0;
	142	}
1da177e4	143
73566edf LB	144	if (physmap_data->nr_parts) {
	145	printk(KERN_NOTICE "Using physmap partition information\n");
	146	add_mtd_partitions(info->mtd, physmap_data->parts,
	147	physmap_data->nr_parts);
	148	return 0;
	149	}
	150	#endif
	151
	152	add_mtd_device(info->mtd);
	153	return 0;
	154
	155	err_out:
	156	physmap_flash_remove(dev);
	157	return err;
	158	}
	159
17c2dae3 LB	160	#ifdef CONFIG_PM
	161	static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
	162	{
	163	struct physmap_flash_info *info = platform_get_drvdata(dev);
	164	int ret = 0;
	165
	166	if (info)
	167	ret = info->mtd->suspend(info->mtd);
	168
	169	return ret;
	170	}
	171
	172	static int physmap_flash_resume(struct platform_device *dev)
	173	{
	174	struct physmap_flash_info *info = platform_get_drvdata(dev);
	175	if (info)
	176	info->mtd->resume(info->mtd);
	177	return 0;
	178	}
	179
	180	static void physmap_flash_shutdown(struct platform_device *dev)
	181	{
	182	struct physmap_flash_info *info = platform_get_drvdata(dev);
	183	if (info && info->mtd->suspend(info->mtd) == 0)
	184	info->mtd->resume(info->mtd);
	185	}
	186	#endif
	187
73566edf LB	188	static struct platform_driver physmap_flash_driver = {
	189	.probe = physmap_flash_probe,
	190	.remove = physmap_flash_remove,
17c2dae3 LB	191	#ifdef CONFIG_PM
	192	.suspend = physmap_flash_suspend,
	193	.resume = physmap_flash_resume,
	194	.shutdown = physmap_flash_shutdown,
	195	#endif
73566edf LB	196	.driver = {
	197	.name = "physmap-flash",
	198	},
	199	};
1da177e4	200
1da177e4	201
73566edf LB	202	#ifdef CONFIG_MTD_PHYSMAP_LEN
	203	#if CONFIG_MTD_PHYSMAP_LEN != 0
	204	#warning using PHYSMAP compat code
	205	#define PHYSMAP_COMPAT
	206	#endif
1da177e4	207	#endif
1da177e4	208
73566edf LB	209	#ifdef PHYSMAP_COMPAT
	210	static struct physmap_flash_data physmap_flash_data = {
	211	.width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
	212	};
1da177e4	213
73566edf LB	214	static struct resource physmap_flash_resource = {
73566edf LB	215	.start = CONFIG_MTD_PHYSMAP_START,
6d4f8224	216	.end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
73566edf LB	217	.flags = IORESOURCE_MEM,
73566edf LB	218	};
1da177e4	219
73566edf LB	220	static struct platform_device physmap_flash = {
	221	.name = "physmap-flash",
	222	.id = 0,
	223	.dev = {
	224	.platform_data = &physmap_flash_data,
	225	},
	226	.num_resources = 1,
	227	.resource = &physmap_flash_resource,
	228	};
	229
	230	void physmap_configure(unsigned long addr, unsigned long size,
	231	int bankwidth, void (set_vpp)(struct map_info , int))
1da177e4	232	{
73566edf LB	233	physmap_flash_resource.start = addr;
	234	physmap_flash_resource.end = addr + size - 1;
	235	physmap_flash_data.width = bankwidth;
	236	physmap_flash_data.set_vpp = set_vpp;
	237	}
	238
1da177e4	239	#ifdef CONFIG_MTD_PARTITIONS
73566edf LB	240	void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
	241	{
	242	physmap_flash_data.nr_parts = num_parts;
	243	physmap_flash_data.parts = parts;
	244	}
	245	#endif
1da177e4	246	#endif
1da177e4	247
73566edf LB	248	static int __init physmap_init(void)
	249	{
	250	int err;
	251
	252	err = platform_driver_register(&physmap_flash_driver);
	253	#ifdef PHYSMAP_COMPAT
	254	if (err == 0)
	255	platform_device_register(&physmap_flash);
	256	#endif
	257
	258	return err;
1da177e4 LT	259	}
1da177e4 LT	260
73566edf LB	261	static void __exit physmap_exit(void)
	262	{
	263	#ifdef PHYSMAP_COMPAT
	264	platform_device_unregister(&physmap_flash);
	265	#endif
	266	platform_driver_unregister(&physmap_flash_driver);
	267	}
1da177e4	268
73566edf LB	269	module_init(physmap_init);
73566edf LB	270	module_exit(physmap_exit);
1da177e4 LT	271
	272	MODULE_LICENSE("GPL");
	273	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	274	MODULE_DESCRIPTION("Generic configurable MTD map driver");