1/*
2 * $Id: mbx860.c,v 1.1.1.1 2007/08/03 18:52:43 Exp $
3 *
4 * Handle mapping of the flash on MBX860 boards
5 *
6 * Author:	Anton Todorov
7 * Copyright:	(C) 2001 Emness Technology
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 */
14
15#include <linux/module.h>
16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/init.h>
19#include <asm/io.h>
20#include <linux/mtd/mtd.h>
21#include <linux/mtd/map.h>
22#include <linux/mtd/partitions.h>
23
24
25#define WINDOW_ADDR 0xfe000000
26#define WINDOW_SIZE 0x00200000
27
28/* Flash / Partition sizing */
29#define MAX_SIZE_KiB              8192
30#define BOOT_PARTITION_SIZE_KiB    512
31#define KERNEL_PARTITION_SIZE_KiB 5632
32#define APP_PARTITION_SIZE_KiB    2048
33
34#define NUM_PARTITIONS 3
35
36/* partition_info gives details on the logical partitions that the split the
37 * single flash device into. If the size if zero we use up to the end of the
38 * device. */
39static struct mtd_partition partition_info[]={
40	{ .name = "MBX flash BOOT partition",
41	.offset = 0,
42	.size =   BOOT_PARTITION_SIZE_KiB*1024 },
43	{ .name = "MBX flash DATA partition",
44	.offset = BOOT_PARTITION_SIZE_KiB*1024,
45	.size = (KERNEL_PARTITION_SIZE_KiB)*1024 },
46	{ .name = "MBX flash APPLICATION partition",
47	.offset = (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 }
48};
49
50
51static struct mtd_info *mymtd;
52
53struct map_info mbx_map = {
54	.name = "MBX flash",
55	.size = WINDOW_SIZE,
56	.phys = WINDOW_ADDR,
57	.bankwidth = 4,
58};
59
60int __init init_mbx(void)
61{
62	printk(KERN_NOTICE "Motorola MBX flash device: 0x%x at 0x%x\n", WINDOW_SIZE*4, WINDOW_ADDR);
63	mbx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
64
65	if (!mbx_map.virt) {
66		printk("Failed to ioremap\n");
67		return -EIO;
68	}
69	simple_map_init(&mbx_map);
70
71	mymtd = do_map_probe("jedec_probe", &mbx_map);
72	if (mymtd) {
73		mymtd->owner = THIS_MODULE;
74		add_mtd_device(mymtd);
75                add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
76		return 0;
77	}
78
79	iounmap((void *)mbx_map.virt);
80	return -ENXIO;
81}
82
83static void __exit cleanup_mbx(void)
84{
85	if (mymtd) {
86		del_mtd_device(mymtd);
87		map_destroy(mymtd);
88	}
89	if (mbx_map.virt) {
90		iounmap((void *)mbx_map.virt);
91		mbx_map.virt = 0;
92	}
93}
94
95module_init(init_mbx);
96module_exit(cleanup_mbx);
97
98MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>");
99MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board");
100MODULE_LICENSE("GPL");
101