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/*
* Handle mapping of the NOR flash on Cogent EDB7312 boards
*
* Copyright 2002 SYSGO Real-Time Solutions GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#define WINDOW_ADDR 0x00000000 /* physical properties of flash */
#define WINDOW_SIZE 0x01000000
#define BUSWIDTH 2
#define FLASH_BLOCKSIZE_MAIN 0x20000
#define FLASH_NUMBLOCKS_MAIN 128
/* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */
#define PROBETYPES { "cfi_probe", NULL }
#define MSG_PREFIX "EDB7312-NOR:" /* prefix for our printk()'s */
#define MTDID "edb7312-nor" /* for mtdparts= partitioning */
static struct mtd_info *mymtd;
struct map_info edb7312nor_map = {
.name = "NOR flash on EDB7312",
.size = WINDOW_SIZE,
.bankwidth = BUSWIDTH,
.phys = WINDOW_ADDR,
};
/*
* MTD partitioning stuff
*/
static struct mtd_partition static_partitions[3] =
{
{
.name = "ARMboot",
.size = 0x40000,
.offset = 0
},
{
.name = "Kernel",
.size = 0x200000,
.offset = 0x40000
},
{
.name = "RootFS",
.size = 0xDC0000,
.offset = 0x240000
},
};
static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
static int mtd_parts_nb = 0;
static struct mtd_partition *mtd_parts = 0;
static int __init init_edb7312nor(void)
{
static const char *rom_probe_types[] = PROBETYPES;
const char **type;
const char *part_type = 0;
printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08x\n",
WINDOW_SIZE, WINDOW_ADDR);
edb7312nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
if (!edb7312nor_map.virt) {
printk(MSG_PREFIX "failed to ioremap\n");
return -EIO;
}
simple_map_init(&edb7312nor_map);
mymtd = 0;
type = rom_probe_types;
for(; !mymtd && *type; type++) {
mymtd = do_map_probe(*type, &edb7312nor_map);
}
if (mymtd) {
mymtd->owner = THIS_MODULE;
mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, MTDID);
if (mtd_parts_nb > 0)
part_type = "detected";
if (mtd_parts_nb == 0) {
mtd_parts = static_partitions;
mtd_parts_nb = ARRAY_SIZE(static_partitions);
part_type = "static";
}
if (mtd_parts_nb == 0)
printk(KERN_NOTICE MSG_PREFIX "no partition info available\n");
else
printk(KERN_NOTICE MSG_PREFIX
"using %s partition definition\n", part_type);
/* Register the whole device first. */
mtd_device_register(mymtd, NULL, 0);
mtd_device_register(mymtd, mtd_parts, mtd_parts_nb);
return 0;
}
iounmap((void *)edb7312nor_map.virt);
return -ENXIO;
}
static void __exit cleanup_edb7312nor(void)
{
if (mymtd) {
mtd_device_unregister(mymtd);
map_destroy(mymtd);
}
if (edb7312nor_map.virt) {
iounmap((void *)edb7312nor_map.virt);
edb7312nor_map.virt = 0;
}
}
module_init(init_edb7312nor);
module_exit(cleanup_edb7312nor);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");
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