[mirror_ubuntu-zesty-kernel.git] / drivers / mtd / onenand / generic.c

/*
 *  linux/drivers/mtd/onenand/generic.c
 *
 *  Copyright (c) 2005 Samsung Electronics
 *  Kyungmin Park <kyungmin.park@samsung.com>
 *
 * 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.
 *
 *  Overview:
 *   This is a device driver for the OneNAND flash for generic boards.
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/onenand.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>

/*
 * Note: Driver name and platform data format have been updated!
 *
 * This version of the driver is named "onenand-flash" and takes struct
 * onenand_platform_data as platform data. The old ARM-specific version
 * with the name "onenand" used to take struct flash_platform_data.
 */
#define DRIVER_NAME	"onenand-flash"

struct onenand_info {
	struct mtd_info		mtd;
	struct onenand_chip	onenand;
};

static int generic_onenand_probe(struct platform_device *pdev)
{
	struct onenand_info *info;
	struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev);
	struct resource *res = pdev->resource;
	unsigned long size = resource_size(res);
	int err;

	info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
		err = -EBUSY;
		goto out_free_info;
	}

	info->onenand.base = ioremap(res->start, size);
	if (!info->onenand.base) {
		err = -ENOMEM;
		goto out_release_mem_region;
	}

	info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL;
	info->onenand.irq = platform_get_irq(pdev, 0);

	info->mtd.dev.parent = &pdev->dev;
	info->mtd.priv = &info->onenand;

	if (onenand_scan(&info->mtd, 1)) {
		err = -ENXIO;
		goto out_iounmap;
	}

	err = mtd_device_parse_register(&info->mtd, NULL, NULL,
					pdata ? pdata->parts : NULL,
					pdata ? pdata->nr_parts : 0);

	platform_set_drvdata(pdev, info);

	return 0;

out_iounmap:
	iounmap(info->onenand.base);
out_release_mem_region:
	release_mem_region(res->start, size);
out_free_info:
	kfree(info);

	return err;
}

static int generic_onenand_remove(struct platform_device *pdev)
{
	struct onenand_info *info = platform_get_drvdata(pdev);
	struct resource *res = pdev->resource;
	unsigned long size = resource_size(res);

	if (info) {
		onenand_release(&info->mtd);
		release_mem_region(res->start, size);
		iounmap(info->onenand.base);
		kfree(info);
	}

	return 0;
}

static struct platform_driver generic_onenand_driver = {
	.driver = {
		.name		= DRIVER_NAME,
	},
	.probe		= generic_onenand_probe,
	.remove		= generic_onenand_remove,
};

module_platform_driver(generic_onenand_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
MODULE_ALIAS("platform:" DRIVER_NAME);
Commit	Line	Data
68ee4b1c KP	1	/*
	2	* linux/drivers/mtd/onenand/generic.c
	3	*
	4	* Copyright (c) 2005 Samsung Electronics
	5	* Kyungmin Park <kyungmin.park@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* Overview:
	12	* This is a device driver for the OneNAND flash for generic boards.
	13	*/
	14
68ee4b1c	15	#include <linux/module.h>
de25968c	16	#include <linux/slab.h>
27f4e083	17	#include <linux/platform_device.h>
68ee4b1c KP	18	#include <linux/mtd/mtd.h>
	19	#include <linux/mtd/onenand.h>
	20	#include <linux/mtd/partitions.h>
2584cf83	21	#include <linux/io.h>
68ee4b1c	22
778dbcc1 MD	23	/*
	24	* Note: Driver name and platform data format have been updated!
	25	*
	26	* This version of the driver is named "onenand-flash" and takes struct
	27	* onenand_platform_data as platform data. The old ARM-specific version
	28	* with the name "onenand" used to take struct flash_platform_data.
	29	*/
	30	#define DRIVER_NAME "onenand-flash"
68ee4b1c	31
68ee4b1c KP	32	struct onenand_info {
68ee4b1c KP	33	struct mtd_info mtd;
68ee4b1c KP	34	struct onenand_chip onenand;
	35	};
	36
06f25510	37	static int generic_onenand_probe(struct platform_device *pdev)
68ee4b1c KP	38	{
68ee4b1c KP	39	struct onenand_info *info;
e09f7f99	40	struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev);
68ee4b1c	41	struct resource *res = pdev->resource;
778dbcc1	42	unsigned long size = resource_size(res);
68ee4b1c KP	43	int err;
68ee4b1c KP	44
95b93a0c	45	info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
68ee4b1c KP	46	if (!info)
	47	return -ENOMEM;
	48
778dbcc1	49	if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
68ee4b1c KP	50	err = -EBUSY;
	51	goto out_free_info;
	52	}
	53
	54	info->onenand.base = ioremap(res->start, size);
	55	if (!info->onenand.base) {
	56	err = -ENOMEM;
	57	goto out_release_mem_region;
	58	}
	59
8b3ae733	60	info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL;
2c22120f	61	info->onenand.irq = platform_get_irq(pdev, 0);
68ee4b1c	62
fe003bc8	63	info->mtd.dev.parent = &pdev->dev;
68ee4b1c	64	info->mtd.priv = &info->onenand;
68ee4b1c KP	65
	66	if (onenand_scan(&info->mtd, 1)) {
	67	err = -ENXIO;
	68	goto out_iounmap;
	69	}
	70
42d7fbe2 AB	71	err = mtd_device_parse_register(&info->mtd, NULL, NULL,
	72	pdata ? pdata->parts : NULL,
	73	pdata ? pdata->nr_parts : 0);
68ee4b1c	74
7a192ec3	75	platform_set_drvdata(pdev, info);
68ee4b1c KP	76
	77	return 0;
	78
	79	out_iounmap:
	80	iounmap(info->onenand.base);
	81	out_release_mem_region:
	82	release_mem_region(res->start, size);
	83	out_free_info:
	84	kfree(info);
	85
	86	return err;
	87	}
	88
810b7e06	89	static int generic_onenand_remove(struct platform_device *pdev)
68ee4b1c	90	{
7a192ec3	91	struct onenand_info *info = platform_get_drvdata(pdev);
68ee4b1c	92	struct resource *res = pdev->resource;
778dbcc1	93	unsigned long size = resource_size(res);
68ee4b1c	94
68ee4b1c	95	if (info) {
68ee4b1c KP	96	onenand_release(&info->mtd);
	97	release_mem_region(res->start, size);
	98	iounmap(info->onenand.base);
	99	kfree(info);
	100	}
	101
	102	return 0;
	103	}
	104
7a192ec3 ML	105	static struct platform_driver generic_onenand_driver = {
	106	.driver = {
	107	.name = DRIVER_NAME,
7a192ec3	108	},
68ee4b1c	109	.probe = generic_onenand_probe,
5153b88c	110	.remove = generic_onenand_remove,
68ee4b1c KP	111	};
68ee4b1c KP	112
f99640de	113	module_platform_driver(generic_onenand_driver);
68ee4b1c KP	114
	115	MODULE_LICENSE("GPL");
	116	MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
	117	MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
f99640de	118	MODULE_ALIAS("platform:" DRIVER_NAME);