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/*
* $Id: physmap.c,v 1.37 2004/11/28 09:40:40 dwmw2 Exp $
*
* Normal mappings of chips in physical memory
*
* Copyright (C) 2003 MontaVista Software Inc.
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
*
* 031022 - [jsun] add run-time configure and partition setup
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/config.h>
#include <linux/mtd/partitions.h>
static struct mtd_info *mymtd;
struct map_info physmap_map = {
.name = "phys_mapped_flash",
.phys = CONFIG_MTD_PHYSMAP_START,
.size = CONFIG_MTD_PHYSMAP_LEN,
.bankwidth = CONFIG_MTD_PHYSMAP_BANKWIDTH,
};
#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition *mtd_parts;
static int mtd_parts_nb;
static int num_physmap_partitions;
static struct mtd_partition *physmap_partitions;
static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL};
void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
{
physmap_partitions=parts;
num_physmap_partitions=num_parts;
}
#endif /* CONFIG_MTD_PARTITIONS */
static int __init init_physmap(void)
{
static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
const char **type;
printk(KERN_NOTICE "physmap flash device: %lx at %lx\n", physmap_map.size, physmap_map.phys);
physmap_map.virt = ioremap(physmap_map.phys, physmap_map.size);
if (!physmap_map.virt) {
printk("Failed to ioremap\n");
return -EIO;
}
simple_map_init(&physmap_map);
mymtd = NULL;
type = rom_probe_types;
for(; !mymtd && *type; type++) {
mymtd = do_map_probe(*type, &physmap_map);
}
if (mymtd) {
mymtd->owner = THIS_MODULE;
#ifdef CONFIG_MTD_PARTITIONS
mtd_parts_nb = parse_mtd_partitions(mymtd, part_probes,
&mtd_parts, 0);
if (mtd_parts_nb > 0)
{
add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb);
return 0;
}
if (num_physmap_partitions != 0)
{
printk(KERN_NOTICE
"Using physmap partition definition\n");
add_mtd_partitions (mymtd, physmap_partitions, num_physmap_partitions);
return 0;
}
#endif
add_mtd_device(mymtd);
return 0;
}
iounmap(physmap_map.virt);
return -ENXIO;
}
static void __exit cleanup_physmap(void)
{
#ifdef CONFIG_MTD_PARTITIONS
if (mtd_parts_nb) {
del_mtd_partitions(mymtd);
kfree(mtd_parts);
} else if (num_physmap_partitions) {
del_mtd_partitions(mymtd);
} else {
del_mtd_device(mymtd);
}
#else
del_mtd_device(mymtd);
#endif
map_destroy(mymtd);
iounmap(physmap_map.virt);
physmap_map.virt = NULL;
}
module_init(init_physmap);
module_exit(cleanup_physmap);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");
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