Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Handle mapping of the flash on MBX860 boards |
3 | * | |
4 | * Author: Anton Todorov | |
5 | * Copyright: (C) 2001 Emness Technology | |
69f34c98 | 6 | * |
1da177e4 LT |
7 | * 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. */ | |
37 | static 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 | }; | |
69f34c98 | 47 | |
1da177e4 LT |
48 | |
49 | static struct mtd_info *mymtd; | |
50 | ||
51 | struct map_info mbx_map = { | |
52 | .name = "MBX flash", | |
53 | .size = WINDOW_SIZE, | |
54 | .phys = WINDOW_ADDR, | |
55 | .bankwidth = 4, | |
56 | }; | |
57 | ||
9cdd52fa | 58 | static int __init init_mbx(void) |
1da177e4 LT |
59 | { |
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; | |
ee0e87b1 JI |
72 | mtd_device_register(mymtd, NULL, 0); |
73 | mtd_device_register(mymtd, partition_info, NUM_PARTITIONS); | |
1da177e4 LT |
74 | return 0; |
75 | } | |
76 | ||
77 | iounmap((void *)mbx_map.virt); | |
78 | return -ENXIO; | |
79 | } | |
80 | ||
81 | static void __exit cleanup_mbx(void) | |
82 | { | |
83 | if (mymtd) { | |
ee0e87b1 | 84 | mtd_device_unregister(mymtd); |
1da177e4 LT |
85 | map_destroy(mymtd); |
86 | } | |
87 | if (mbx_map.virt) { | |
88 | iounmap((void *)mbx_map.virt); | |
89 | mbx_map.virt = 0; | |
90 | } | |
91 | } | |
92 | ||
93 | module_init(init_mbx); | |
94 | module_exit(cleanup_mbx); | |
95 | ||
96 | MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>"); | |
97 | MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board"); | |
98 | MODULE_LICENSE("GPL"); |