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/*
* Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
* (c) 2005 MontaVista Software, Inc.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/ioport.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/clocksource.h>
#include <asm/mach-types.h>
#include <asm/mach/flash.h>
#define DVR_VER "2.0"
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL };
#endif
struct mxcflash_info {
struct mtd_partition *parts;
struct mtd_info *mtd;
struct map_info map;
};
/*!
* @defgroup NOR_MTD NOR Flash MTD Driver
*/
/*!
* @file mxc_nor.c
*
* @brief This file contains the MTD Mapping information on the MXC.
*
* @ingroup NOR_MTD
*/
static int __devinit mxcflash_probe(struct platform_device *pdev)
{
int err, nr_parts = 0;
struct mxcflash_info *info;
struct flash_platform_data *flash = pdev->dev.platform_data;
struct resource *res = pdev->resource;
unsigned long size = res->end - res->start + 1;
info = kzalloc(sizeof(struct mxcflash_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
if (!request_mem_region(res->start, size, "flash")) {
err = -EBUSY;
goto out_free_info;
}
info->map.virt = ioremap(res->start, size);
if (!info->map.virt) {
err = -ENOMEM;
goto out_release_mem_region;
}
info->map.name = dev_name(&pdev->dev);
info->map.phys = res->start;
info->map.size = size;
info->map.bankwidth = flash->width;
simple_map_init(&info->map);
info->mtd = do_map_probe(flash->map_name, &info->map);
if (!info->mtd) {
err = -EIO;
goto out_iounmap;
}
info->mtd->owner = THIS_MODULE;
#ifdef CONFIG_MTD_PARTITIONS
nr_parts =
parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0);
if (nr_parts > 0) {
add_mtd_partitions(info->mtd, info->parts, nr_parts);
} else if (flash->parts) {
add_mtd_partitions(info->mtd, flash->parts, flash->nr_parts);
} else
#endif
{
printk(KERN_NOTICE "MXC flash: no partition info "
"available, registering whole flash\n");
add_mtd_device(info->mtd);
}
platform_set_drvdata(pdev, info);
return 0;
out_iounmap:
iounmap(info->map.virt);
out_release_mem_region:
release_mem_region(res->start, size);
out_free_info:
kfree(info);
return err;
}
static int __devexit mxcflash_remove(struct platform_device *pdev)
{
struct mxcflash_info *info = platform_get_drvdata(pdev);
struct flash_platform_data *flash = pdev->dev.platform_data;
platform_set_drvdata(pdev, NULL);
if (info) {
if (info->parts) {
del_mtd_partitions(info->mtd);
kfree(info->parts);
} else if (flash->parts)
del_mtd_partitions(info->mtd);
else
del_mtd_device(info->mtd);
map_destroy(info->mtd);
release_mem_region(info->map.phys, info->map.size);
iounmap((void __iomem *)info->map.virt);
kfree(info);
}
return 0;
}
static struct platform_driver mxcflash_driver = {
.driver = {
.name = "mxc_nor_flash",
},
.probe = mxcflash_probe,
.remove = __devexit_p(mxcflash_remove),
};
/*!
* This is the module's entry function. It passes board specific
* config details into the MTD physmap driver which then does the
* real work for us. After this function runs, our job is done.
*
* @return 0 if successful; non-zero otherwise
*/
static int __init mxc_mtd_init(void)
{
pr_info("MXC MTD nor Driver %s\n", DVR_VER);
if (platform_driver_register(&mxcflash_driver) != 0) {
printk(KERN_ERR "Driver register failed for mxcflash_driver\n");
return -ENODEV;
}
return 0;
}
/*!
* This function is the module's exit function. It's empty because the
* MTD physmap driver is doing the real work and our job was done after
* mxc_mtd_init() runs.
*/
static void __exit mxc_mtd_exit(void)
{
platform_driver_unregister(&mxcflash_driver);
}
module_init(mxc_mtd_init);
module_exit(mxc_mtd_exit);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("MTD map and partitions for Freescale MXC boards");
MODULE_LICENSE("GPL");
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