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/*
* $Id: physmap.c,v 1.1 2000/07/04 08:58:10 dwmw2 Exp $
*
* Normal mappings of chips in physical memory
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#define WINDOW_ADDR 0x8000000
#define WINDOW_SIZE 0x4000000
static struct mtd_info *mymtd;
__u8 physmap_read8(struct map_info *map, unsigned long ofs)
{
return readb(map->map_priv_1 + ofs);
}
__u16 physmap_read16(struct map_info *map, unsigned long ofs)
{
return readw(map->map_priv_1 + ofs);
}
__u32 physmap_read32(struct map_info *map, unsigned long ofs)
{
return readl(map->map_priv_1 + ofs);
}
void physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
memcpy_fromio(to, map->map_priv_1 + from, len);
}
void physmap_write8(struct map_info *map, __u8 d, unsigned long adr)
{
writeb(d, map->map_priv_1 + adr);
}
void physmap_write16(struct map_info *map, __u16 d, unsigned long adr)
{
writew(d, map->map_priv_1 + adr);
}
void physmap_write32(struct map_info *map, __u32 d, unsigned long adr)
{
writel(d, map->map_priv_1 + adr);
}
void physmap_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
{
memcpy_toio(map->map_priv_1 + to, from, len);
}
struct map_info physmap_map = {
"Physically mapped flash",
WINDOW_SIZE,
2,
physmap_read8,
physmap_read16,
physmap_read32,
physmap_copy_from,
physmap_write8,
physmap_write16,
physmap_write32,
physmap_copy_to,
0,
0
};
#if LINUX_VERSION_CODE < 0x20300
#ifdef MODULE
#define init_physmap init_module
#define cleanup_physmap cleanup_module
#endif
#endif
int __init init_physmap(void)
{
printk(KERN_NOTICE "physmap flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
physmap_map.map_priv_1 = (unsigned long)ioremap(WINDOW_SIZE, WINDOW_ADDR);
if (!physmap_map.map_priv_1) {
printk("Failed to ioremap\n");
return -EIO;
}
mymtd = do_cfi_probe(&physmap_map);
if (mymtd) {
#ifdef MODULE
mymtd->module = &__this_module;
#endif
add_mtd_device(mymtd);
return 0;
}
return -ENXIO;
}
static void __exit cleanup_physmap(void)
{
if (mymtd) {
del_mtd_device(mymtd);
map_destroy(mymtd);
}
if (physmap_map.map_priv_1) {
iounmap((void *)physmap_map.map_priv_1);
physmap_map.map_priv_1 = 0;
}
}
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