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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Thomas Gleixner69f34c92005-11-07 11:15:40 +00002 * $Id: mbx860.c,v 1.9 2005/11/07 11:14:27 gleixner Exp $
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * Handle mapping of the flash on MBX860 boards
5 *
6 * Author: Anton Todorov
7 * Copyright: (C) 2001 Emness Technology
Thomas Gleixner69f34c92005-11-07 11:15:40 +00008 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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};
Thomas Gleixner69f34c92005-11-07 11:15:40 +000049
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
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");