-/*
- * 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");
projects / openwrt / staging / chunkeey.git / commitdiff