[linux-2.6-block.git] / drivers / mtd / maps / rbtx4939-flash.c

/*
 * rbtx4939-flash (based on physmap.c)
 *
 * This is a simplified physmap driver with map_init callback function.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Copyright (C) 2009 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
 */

#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 <asm/txx9/rbtx4939.h>

struct rbtx4939_flash_info {
	struct mtd_info *mtd;
	struct map_info map;
};

static int rbtx4939_flash_remove(struct platform_device *dev)
{
	struct rbtx4939_flash_info *info;

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

	if (info->mtd) {
		struct rbtx4939_flash_data *pdata = dev->dev.platform_data;

		mtd_device_unregister(info->mtd);
		map_destroy(info->mtd);
	}
	return 0;
}

static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL };

static int rbtx4939_flash_probe(struct platform_device *dev)
{
	struct rbtx4939_flash_data *pdata;
	struct rbtx4939_flash_info *info;
	struct resource *res;
	const char **probe_type;
	int err = 0;
	unsigned long size;

	pdata = dev->dev.platform_data;
	if (!pdata)
		return -ENODEV;

	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;
	info = devm_kzalloc(&dev->dev, sizeof(struct rbtx4939_flash_info),
			    GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	platform_set_drvdata(dev, info);

	size = resource_size(res);
	pr_notice("rbtx4939 platform flash device: %pR\n", res);

	if (!devm_request_mem_region(&dev->dev, res->start, size,
				     dev_name(&dev->dev)))
		return -EBUSY;

	info->map.name = dev_name(&dev->dev);
	info->map.phys = res->start;
	info->map.size = size;
	info->map.bankwidth = pdata->width;

	info->map.virt = devm_ioremap(&dev->dev, info->map.phys, size);
	if (!info->map.virt)
		return -EBUSY;

	if (pdata->map_init)
		(*pdata->map_init)(&info->map);
	else
		simple_map_init(&info->map);

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

	if (err)
		goto err_out;
	return 0;

err_out:
	rbtx4939_flash_remove(dev);
	return err;
}

#ifdef CONFIG_PM
static void rbtx4939_flash_shutdown(struct platform_device *dev)
{
	struct rbtx4939_flash_info *info = platform_get_drvdata(dev);

	if (mtd_suspend(info->mtd) == 0)
		mtd_resume(info->mtd);
}
#else
#define rbtx4939_flash_shutdown NULL
#endif

static struct platform_driver rbtx4939_flash_driver = {
	.probe		= rbtx4939_flash_probe,
	.remove		= rbtx4939_flash_remove,
	.shutdown	= rbtx4939_flash_shutdown,
	.driver		= {
		.name	= "rbtx4939-flash",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(rbtx4939_flash_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("RBTX4939 MTD map driver");
MODULE_ALIAS("platform:rbtx4939-flash");
Commit	Line	Data
610f75e7 AN	1	/*
	2	* rbtx4939-flash (based on physmap.c)
	3	*
	4	* This is a simplified physmap driver with map_init callback function.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	* Copyright (C) 2009 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/types.h>
	15	#include <linux/kernel.h>
	16	#include <linux/init.h>
	17	#include <linux/slab.h>
	18	#include <linux/device.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/mtd/mtd.h>
	21	#include <linux/mtd/map.h>
	22	#include <linux/mtd/partitions.h>
	23	#include <asm/txx9/rbtx4939.h>
	24
	25	struct rbtx4939_flash_info {
	26	struct mtd_info *mtd;
	27	struct map_info map;
610f75e7 AN	28	};
	29
	30	static int rbtx4939_flash_remove(struct platform_device *dev)
	31	{
	32	struct rbtx4939_flash_info *info;
	33
	34	info = platform_get_drvdata(dev);
	35	if (!info)
	36	return 0;
	37	platform_set_drvdata(dev, NULL);
	38
	39	if (info->mtd) {
610f75e7 AN	40	struct rbtx4939_flash_data *pdata = dev->dev.platform_data;
610f75e7 AN	41
16b0eb15	42	mtd_device_unregister(info->mtd);
610f75e7 AN	43	map_destroy(info->mtd);
	44	}
	45	return 0;
	46	}
	47
	48	static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL };
610f75e7 AN	49
	50	static int rbtx4939_flash_probe(struct platform_device *dev)
	51	{
	52	struct rbtx4939_flash_data *pdata;
	53	struct rbtx4939_flash_info *info;
	54	struct resource *res;
	55	const char **probe_type;
	56	int err = 0;
	57	unsigned long size;
	58
	59	pdata = dev->dev.platform_data;
	60	if (!pdata)
	61	return -ENODEV;
	62
	63	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
	64	if (!res)
	65	return -ENODEV;
	66	info = devm_kzalloc(&dev->dev, sizeof(struct rbtx4939_flash_info),
	67	GFP_KERNEL);
	68	if (!info)
	69	return -ENOMEM;
	70
	71	platform_set_drvdata(dev, info);
	72
	73	size = resource_size(res);
	74	pr_notice("rbtx4939 platform flash device: %pR\n", res);
	75
	76	if (!devm_request_mem_region(&dev->dev, res->start, size,
	77	dev_name(&dev->dev)))
	78	return -EBUSY;
	79
	80	info->map.name = dev_name(&dev->dev);
	81	info->map.phys = res->start;
	82	info->map.size = size;
	83	info->map.bankwidth = pdata->width;
	84
	85	info->map.virt = devm_ioremap(&dev->dev, info->map.phys, size);
	86	if (!info->map.virt)
	87	return -EBUSY;
	88
	89	if (pdata->map_init)
	90	(*pdata->map_init)(&info->map);
	91	else
	92	simple_map_init(&info->map);
	93
	94	probe_type = rom_probe_types;
	95	for (; !info->mtd && *probe_type; probe_type++)
	96	info->mtd = do_map_probe(*probe_type, &info->map);
	97	if (!info->mtd) {
	98	dev_err(&dev->dev, "map_probe failed\n");
	99	err = -ENXIO;
	100	goto err_out;
	101	}
	102	info->mtd->owner = THIS_MODULE;
42d7fbe2 AB	103	err = mtd_device_parse_register(info->mtd, NULL, NULL, pdata->parts,
42d7fbe2 AB	104	pdata->nr_parts);
610f75e7	105
c77d8092 DES	106	if (err)
c77d8092 DES	107	goto err_out;
610f75e7 AN	108	return 0;
	109
	110	err_out:
	111	rbtx4939_flash_remove(dev);
	112	return err;
	113	}
	114
	115	#ifdef CONFIG_PM
610f75e7 AN	116	static void rbtx4939_flash_shutdown(struct platform_device *dev)
	117	{
	118	struct rbtx4939_flash_info *info = platform_get_drvdata(dev);
	119
079c985e AB	120	if (mtd_suspend(info->mtd) == 0)
079c985e AB	121	mtd_resume(info->mtd);
610f75e7 AN	122	}
610f75e7 AN	123	#else
610f75e7 AN	124	#define rbtx4939_flash_shutdown NULL
	125	#endif
	126
	127	static struct platform_driver rbtx4939_flash_driver = {
	128	.probe = rbtx4939_flash_probe,
	129	.remove = rbtx4939_flash_remove,
610f75e7 AN	130	.shutdown = rbtx4939_flash_shutdown,
	131	.driver = {
	132	.name = "rbtx4939-flash",
	133	.owner = THIS_MODULE,
	134	},
	135	};
	136
f99640de	137	module_platform_driver(rbtx4939_flash_driver);
610f75e7 AN	138
	139	MODULE_LICENSE("GPL");
	140	MODULE_DESCRIPTION("RBTX4939 MTD map driver");
	141	MODULE_ALIAS("platform:rbtx4939-flash");