fix Magicbox for .21 and convert to the new structure

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7328 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/magicbox-2.6/files/drivers/mtd/maps/magicmap.c

@@ -0,0 +1,113 @@
+/*
+ * 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");