2 * Handle mapping of the NOR flash on Cogent EDB7312 boards
4 * Copyright 2002 SYSGO Real-Time Solutions GmbH
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.
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
16 #include <linux/mtd/mtd.h>
17 #include <linux/mtd/map.h>
19 #ifdef CONFIG_MTD_PARTITIONS
20 #include <linux/mtd/partitions.h>
23 #define WINDOW_ADDR 0x00000000 /* physical properties of flash */
24 #define WINDOW_SIZE 0x01000000
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 }
31 #define MSG_PREFIX "EDB7312-NOR:" /* prefix for our printk()'s */
32 #define MTDID "edb7312-nor" /* for mtdparts= partitioning */
34 static struct mtd_info *mymtd;
36 struct map_info edb7312nor_map = {
37 .name = "NOR flash on EDB7312",
39 .bankwidth = BUSWIDTH,
43 #ifdef CONFIG_MTD_PARTITIONS
46 * MTD partitioning stuff
48 static struct mtd_partition static_partitions[3] =
67 static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
71 static int mtd_parts_nb = 0;
72 static struct mtd_partition *mtd_parts = 0;
74 static int __init init_edb7312nor(void)
76 static const char *rom_probe_types[] = PROBETYPES;
78 const char *part_type = 0;
80 printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08x\n",
81 WINDOW_SIZE, WINDOW_ADDR);
82 edb7312nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
84 if (!edb7312nor_map.virt) {
85 printk(MSG_PREFIX "failed to ioremap\n");
89 simple_map_init(&edb7312nor_map);
92 type = rom_probe_types;
93 for(; !mymtd && *type; type++) {
94 mymtd = do_map_probe(*type, &edb7312nor_map);
97 mymtd->owner = THIS_MODULE;
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";
104 if (mtd_parts_nb == 0)
106 mtd_parts = static_partitions;
107 mtd_parts_nb = ARRAY_SIZE(static_partitions);
108 part_type = "static";
111 add_mtd_device(mymtd);
112 if (mtd_parts_nb == 0)
113 printk(KERN_NOTICE MSG_PREFIX "no partition info available\n");
116 printk(KERN_NOTICE MSG_PREFIX
117 "using %s partition definition\n", part_type);
118 add_mtd_partitions(mymtd, mtd_parts, mtd_parts_nb);
123 iounmap((void *)edb7312nor_map.virt);
127 static void __exit cleanup_edb7312nor(void)
130 del_mtd_device(mymtd);
133 if (edb7312nor_map.virt) {
134 iounmap((void *)edb7312nor_map.virt);
135 edb7312nor_map.virt = 0;
139 module_init(init_edb7312nor);
140 module_exit(cleanup_edb7312nor);
142 MODULE_LICENSE("GPL");
143 MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>");
144 MODULE_DESCRIPTION("Generic configurable MTD map driver");