blob: 93fa56c33003bf162eeb29b1a351cbe320c7c2fa [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Handle mapping of the flash on MBX860 boards
3 *
4 * Author: Anton Todorov
5 * Copyright: (C) 2001 Emness Technology
Thomas Gleixner69f34c92005-11-07 11:15:40 +00006 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 */
12
13#include <linux/module.h>
14#include <linux/types.h>
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <asm/io.h>
18#include <linux/mtd/mtd.h>
19#include <linux/mtd/map.h>
20#include <linux/mtd/partitions.h>
21
22
23#define WINDOW_ADDR 0xfe000000
24#define WINDOW_SIZE 0x00200000
25
26/* Flash / Partition sizing */
27#define MAX_SIZE_KiB 8192
28#define BOOT_PARTITION_SIZE_KiB 512
29#define KERNEL_PARTITION_SIZE_KiB 5632
30#define APP_PARTITION_SIZE_KiB 2048
31
32#define NUM_PARTITIONS 3
33
34/* partition_info gives details on the logical partitions that the split the
35 * single flash device into. If the size if zero we use up to the end of the
36 * device. */
37static struct mtd_partition partition_info[]={
38 { .name = "MBX flash BOOT partition",
39 .offset = 0,
40 .size = BOOT_PARTITION_SIZE_KiB*1024 },
41 { .name = "MBX flash DATA partition",
42 .offset = BOOT_PARTITION_SIZE_KiB*1024,
43 .size = (KERNEL_PARTITION_SIZE_KiB)*1024 },
44 { .name = "MBX flash APPLICATION partition",
45 .offset = (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 }
46};
Thomas Gleixner69f34c92005-11-07 11:15:40 +000047
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49static struct mtd_info *mymtd;
50
51struct map_info mbx_map = {
52 .name = "MBX flash",
53 .size = WINDOW_SIZE,
54 .phys = WINDOW_ADDR,
55 .bankwidth = 4,
56};
57
Dmitri Vorobiev9cdd52f2008-11-25 02:55:01 +020058static int __init init_mbx(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059{
60 printk(KERN_NOTICE "Motorola MBX flash device: 0x%x at 0x%x\n", WINDOW_SIZE*4, WINDOW_ADDR);
61 mbx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
62
63 if (!mbx_map.virt) {
64 printk("Failed to ioremap\n");
65 return -EIO;
66 }
67 simple_map_init(&mbx_map);
68
69 mymtd = do_map_probe("jedec_probe", &mbx_map);
70 if (mymtd) {
71 mymtd->owner = THIS_MODULE;
Jamie Ilesee0e87b2011-05-23 10:23:40 +010072 mtd_device_register(mymtd, NULL, 0);
73 mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 return 0;
75 }
76
77 iounmap((void *)mbx_map.virt);
78 return -ENXIO;
79}
80
81static void __exit cleanup_mbx(void)
82{
83 if (mymtd) {
Jamie Ilesee0e87b2011-05-23 10:23:40 +010084 mtd_device_unregister(mymtd);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 map_destroy(mymtd);
86 }
87 if (mbx_map.virt) {
88 iounmap((void *)mbx_map.virt);
89 mbx_map.virt = 0;
90 }
91}
92
93module_init(init_mbx);
94module_exit(cleanup_mbx);
95
96MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>");
97MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board");
98MODULE_LICENSE("GPL");