2 * $Id: edb7312.c,v 1.14 2005/11/07 11:14:27 gleixner Exp $
4 * Handle mapping of the NOR flash on Cogent EDB7312 boards
6 * Copyright 2002 SYSGO Real-Time Solutions GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
18 #include <linux/mtd/mtd.h>
19 #include <linux/mtd/map.h>
20 #include <linux/config.h>
22 #ifdef CONFIG_MTD_PARTITIONS
23 #include <linux/mtd/partitions.h>
26 #define WINDOW_ADDR 0x00000000 /* physical properties of flash */
27 #define WINDOW_SIZE 0x01000000
29 #define FLASH_BLOCKSIZE_MAIN 0x20000
30 #define FLASH_NUMBLOCKS_MAIN 128
31 /* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */
32 #define PROBETYPES { "cfi_probe", NULL }
34 #define MSG_PREFIX "EDB7312-NOR:" /* prefix for our printk()'s */
35 #define MTDID "edb7312-nor" /* for mtdparts= partitioning */
37 static struct mtd_info *mymtd;
39 struct map_info edb7312nor_map = {
40 .name = "NOR flash on EDB7312",
42 .bankwidth = BUSWIDTH,
46 #ifdef CONFIG_MTD_PARTITIONS
49 * MTD partitioning stuff
51 static struct mtd_partition static_partitions[3] =
70 static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
74 static int mtd_parts_nb = 0;
75 static struct mtd_partition *mtd_parts = 0;
77 int __init init_edb7312nor(void)
79 static const char *rom_probe_types[] = PROBETYPES;
81 const char *part_type = 0;
83 printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08x\n",
84 WINDOW_SIZE, WINDOW_ADDR);
85 edb7312nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
87 if (!edb7312nor_map.virt) {
88 printk(MSG_PREFIX "failed to ioremap\n");
92 simple_map_init(&edb7312nor_map);
95 type = rom_probe_types;
96 for(; !mymtd && *type; type++) {
97 mymtd = do_map_probe(*type, &edb7312nor_map);
100 mymtd->owner = THIS_MODULE;
102 #ifdef CONFIG_MTD_PARTITIONS
103 mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, MTDID);
104 if (mtd_parts_nb > 0)
105 part_type = "detected";
107 if (mtd_parts_nb == 0)
109 mtd_parts = static_partitions;
110 mtd_parts_nb = ARRAY_SIZE(static_partitions);
111 part_type = "static";
114 add_mtd_device(mymtd);
115 if (mtd_parts_nb == 0)
116 printk(KERN_NOTICE MSG_PREFIX "no partition info available\n");
119 printk(KERN_NOTICE MSG_PREFIX
120 "using %s partition definition\n", part_type);
121 add_mtd_partitions(mymtd, mtd_parts, mtd_parts_nb);
126 iounmap((void *)edb7312nor_map.virt);
130 static void __exit cleanup_edb7312nor(void)
133 del_mtd_device(mymtd);
136 if (edb7312nor_map.virt) {
137 iounmap((void *)edb7312nor_map.virt);
138 edb7312nor_map.virt = 0;
142 module_init(init_edb7312nor);
143 module_exit(cleanup_edb7312nor);
145 MODULE_LICENSE("GPL");
146 MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>");
147 MODULE_DESCRIPTION("Generic configurable MTD map driver");