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/*
* magicmap.c: Copyleft 2005 Karol Lewandowski
*
* Mapping for MagicBox flash.
* Based on walnut.c.
*
* Heikki Lindholm <holindho@infradead.org>
*
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/autoconf.h>
#include <asm/io.h>
static struct mtd_info *flash;
static struct map_info magic_map = {
.name = "Magically mapped flash",
.phys = 0xffc00000,
.size = 0x400000,
.bankwidth = 2,
};
static struct mtd_partition magic_partitions[] = {
{
.name = "linux",
.offset = 0x0,
.size = 0x3c0000,
},
{
.name = "rootfs",
.offset = 0x100000,
.size = 0x2c0000,
},
{
.name = "bootloader",
.offset = 0x3c0000,
.size = 0x040000,
.mask_flags = MTD_WRITEABLE,
},
};
int __init init_magic(void)
{
u32 size, len;
magic_map.virt =
(void __iomem *)ioremap(magic_map.phys, magic_map.size);
if (!magic_map.virt) {
printk("Failed to ioremap flash.\n");
return -EIO;
}
simple_map_init(&magic_map);
flash = do_map_probe("cfi_probe", &magic_map);
if (flash) {
flash->owner = THIS_MODULE;
if (flash->read(flash, 12, sizeof(u32), &len, (char *) &size) ||
len != 4)
return -ENXIO;
size += 0x40; /* header size of the uImage */
if (size < 0x400000) {
/* skip to next erase block */
if (size & (flash->erasesize - 1)) {
size |= (flash->erasesize - 1);
size += 1;
}
magic_partitions[1].offset = size;
magic_partitions[1].size = magic_partitions[2].offset - size;
}
add_mtd_partitions(flash, magic_partitions,
ARRAY_SIZE(magic_partitions));
} else {
printk("map probe failed for flash\n");
return -ENXIO;
}
return 0;
}
static void __exit cleanup_magic(void)
{
if (flash) {
del_mtd_partitions(flash);
map_destroy(flash);
}
if (magic_map.virt) {
iounmap((void *)magic_map.virt);
magic_map.virt = NULL;
}
}
module_init(init_magic);
module_exit(cleanup_magic);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Karol Lewandowski");
MODULE_DESCRIPTION("MTD map and partitions for IBM 405EP MagicBox boards");
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