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/*
* Handle mapping of the flash on MBX860 boards
*
* Author: Anton Todorov
* Copyright: (C) 2001 Emness Technology
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#define WINDOW_ADDR 0xfe000000
#define WINDOW_SIZE 0x00200000
/* Flash / Partition sizing */
#define MAX_SIZE_KiB 8192
#define BOOT_PARTITION_SIZE_KiB 512
#define KERNEL_PARTITION_SIZE_KiB 5632
#define APP_PARTITION_SIZE_KiB 2048
#define NUM_PARTITIONS 3
/* partition_info gives details on the logical partitions that the split the
* single flash device into. If the size if zero we use up to the end of the
* device. */
static struct mtd_partition partition_info[]={
{ .name = "MBX flash BOOT partition",
.offset = 0,
.size = BOOT_PARTITION_SIZE_KiB*1024 },
{ .name = "MBX flash DATA partition",
.offset = BOOT_PARTITION_SIZE_KiB*1024,
.size = (KERNEL_PARTITION_SIZE_KiB)*1024 },
{ .name = "MBX flash APPLICATION partition",
.offset = (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 }
};
static struct mtd_info *mymtd;
struct map_info mbx_map = {
.name = "MBX flash",
.size = WINDOW_SIZE,
.phys = WINDOW_ADDR,
.bankwidth = 4,
};
static int __init init_mbx(void)
{
printk(KERN_NOTICE "Motorola MBX flash device: 0x%x at 0x%x\n", WINDOW_SIZE*4, WINDOW_ADDR);
mbx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
if (!mbx_map.virt) {
printk("Failed to ioremap\n");
return -EIO;
}
simple_map_init(&mbx_map);
mymtd = do_map_probe("jedec_probe", &mbx_map);
if (mymtd) {
mymtd->owner = THIS_MODULE;
add_mtd_device(mymtd);
add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
return 0;
}
iounmap((void *)mbx_map.virt);
return -ENXIO;
}
static void __exit cleanup_mbx(void)
{
if (mymtd) {
del_mtd_device(mymtd);
map_destroy(mymtd);
}
if (mbx_map.virt) {
iounmap((void *)mbx_map.virt);
mbx_map.virt = 0;
}
}
module_init(init_mbx);
module_exit(cleanup_mbx);
MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>");
MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board");
MODULE_LICENSE("GPL");
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