Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Handle mapping of the NOR flash on Cogent EDB7312 boards |
3 | * | |
4 | * Copyright 2002 SYSGO Real-Time Solutions GmbH | |
69f34c98 | 5 | * |
1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <asm/io.h> | |
16 | #include <linux/mtd/mtd.h> | |
17 | #include <linux/mtd/map.h> | |
1da177e4 LT |
18 | |
19 | #ifdef CONFIG_MTD_PARTITIONS | |
20 | #include <linux/mtd/partitions.h> | |
21 | #endif | |
22 | ||
23 | #define WINDOW_ADDR 0x00000000 /* physical properties of flash */ | |
24 | #define WINDOW_SIZE 0x01000000 | |
25 | #define BUSWIDTH 2 | |
26 | #define FLASH_BLOCKSIZE_MAIN 0x20000 | |
27 | #define FLASH_NUMBLOCKS_MAIN 128 | |
28 | /* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */ | |
29 | #define PROBETYPES { "cfi_probe", NULL } | |
30 | ||
31 | #define MSG_PREFIX "EDB7312-NOR:" /* prefix for our printk()'s */ | |
32 | #define MTDID "edb7312-nor" /* for mtdparts= partitioning */ | |
33 | ||
34 | static struct mtd_info *mymtd; | |
35 | ||
36 | struct map_info edb7312nor_map = { | |
37 | .name = "NOR flash on EDB7312", | |
38 | .size = WINDOW_SIZE, | |
39 | .bankwidth = BUSWIDTH, | |
40 | .phys = WINDOW_ADDR, | |
41 | }; | |
42 | ||
43 | #ifdef CONFIG_MTD_PARTITIONS | |
44 | ||
45 | /* | |
69f34c98 | 46 | * MTD partitioning stuff |
1da177e4 LT |
47 | */ |
48 | static struct mtd_partition static_partitions[3] = | |
49 | { | |
50 | { | |
51 | .name = "ARMboot", | |
52 | .size = 0x40000, | |
53 | .offset = 0 | |
54 | }, | |
55 | { | |
56 | .name = "Kernel", | |
57 | .size = 0x200000, | |
58 | .offset = 0x40000 | |
59 | }, | |
60 | { | |
61 | .name = "RootFS", | |
62 | .size = 0xDC0000, | |
63 | .offset = 0x240000 | |
64 | }, | |
65 | }; | |
66 | ||
67 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; | |
68 | ||
69 | #endif | |
70 | ||
71 | static int mtd_parts_nb = 0; | |
72 | static struct mtd_partition *mtd_parts = 0; | |
73 | ||
d8156adb | 74 | static int __init init_edb7312nor(void) |
1da177e4 LT |
75 | { |
76 | static const char *rom_probe_types[] = PROBETYPES; | |
77 | const char **type; | |
78 | const char *part_type = 0; | |
79 | ||
69f34c98 | 80 | printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08x\n", |
1da177e4 LT |
81 | WINDOW_SIZE, WINDOW_ADDR); |
82 | edb7312nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); | |
83 | ||
84 | if (!edb7312nor_map.virt) { | |
85 | printk(MSG_PREFIX "failed to ioremap\n"); | |
86 | return -EIO; | |
87 | } | |
69f34c98 | 88 | |
1da177e4 LT |
89 | simple_map_init(&edb7312nor_map); |
90 | ||
91 | mymtd = 0; | |
92 | type = rom_probe_types; | |
93 | for(; !mymtd && *type; type++) { | |
94 | mymtd = do_map_probe(*type, &edb7312nor_map); | |
95 | } | |
96 | if (mymtd) { | |
97 | mymtd->owner = THIS_MODULE; | |
98 | ||
99 | #ifdef CONFIG_MTD_PARTITIONS | |
100 | mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, MTDID); | |
101 | if (mtd_parts_nb > 0) | |
102 | part_type = "detected"; | |
103 | ||
104 | if (mtd_parts_nb == 0) | |
105 | { | |
106 | mtd_parts = static_partitions; | |
107 | mtd_parts_nb = ARRAY_SIZE(static_partitions); | |
108 | part_type = "static"; | |
109 | } | |
110 | #endif | |
111 | add_mtd_device(mymtd); | |
112 | if (mtd_parts_nb == 0) | |
113 | printk(KERN_NOTICE MSG_PREFIX "no partition info available\n"); | |
114 | else | |
115 | { | |
116 | printk(KERN_NOTICE MSG_PREFIX | |
117 | "using %s partition definition\n", part_type); | |
118 | add_mtd_partitions(mymtd, mtd_parts, mtd_parts_nb); | |
119 | } | |
120 | return 0; | |
121 | } | |
122 | ||
123 | iounmap((void *)edb7312nor_map.virt); | |
124 | return -ENXIO; | |
125 | } | |
126 | ||
127 | static void __exit cleanup_edb7312nor(void) | |
128 | { | |
129 | if (mymtd) { | |
130 | del_mtd_device(mymtd); | |
131 | map_destroy(mymtd); | |
132 | } | |
133 | if (edb7312nor_map.virt) { | |
134 | iounmap((void *)edb7312nor_map.virt); | |
135 | edb7312nor_map.virt = 0; | |
136 | } | |
137 | } | |
138 | ||
139 | module_init(init_edb7312nor); | |
140 | module_exit(cleanup_edb7312nor); | |
141 | ||
142 | MODULE_LICENSE("GPL"); | |
143 | MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>"); | |
144 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); |