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#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>
#include <linux/mtd/partitions.h>
#include <linux/config.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/major.h>
#include <asm/io.h>
#if 1
#define DEBUGMTD printk
#else
#define DEBUGMTD
#endif
#define WINDOW_ADDR 0xFF000000 //lsshi
#define WINDOW_SIZE 0x400000 //flash size (4M)
#define BUSWIDTH 2
static struct mtd_info *mymtd;
__u8 W90N745_read8(struct map_info *map, unsigned long ofs)
{
return __raw_readb(map->map_priv_1 + ofs);
}
struct map_info W90N745_map;
__u16 W90N745_read16(struct map_info *map, unsigned long ofs)
{
return __raw_readw(map->map_priv_1 + ofs);
}
map_word W90N745_read(struct map_info *map, unsigned long ofs)
{
map_word r;
r.x[0] = __raw_readw(map->map_priv_1 + ofs);
return r;
}
__u32 W90N745_read32(struct map_info *map, unsigned long ofs)
{
return __raw_readl(map->map_priv_1 + ofs);
}
void W90N745_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
memcpy_fromio(to, map->map_priv_1 + from, len);
}
void W90N745_write8(struct map_info *map, __u8 d, unsigned long adr)
{
__raw_writeb(d, map->map_priv_1 + adr);
mb();
}
void W90N745_write16(struct map_info *map, __u16 d, unsigned long adr)
{
__raw_writew(d, map->map_priv_1 + adr);
mb();
}
void W90N745_write(struct map_info *map, const map_word datum, unsigned long ofs)
{
__raw_writew(datum.x[0], map->map_priv_1 + ofs);
mb();
}
void W90N745_write32(struct map_info *map, __u32 d, unsigned long adr)
{
__raw_writel(d, map->map_priv_1 + adr);
mb();
}
void W90N745_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 W90N745_map = {
name: "POS-TAX flash device", //lsshi W90N745 flash device
size: WINDOW_SIZE,
buswidth: BUSWIDTH,
read: W90N745_read,
read8: W90N745_read8,
read16: W90N745_read16,
read32: W90N745_read32,
copy_from: W90N745_copy_from,
write8: W90N745_write8,
write16: W90N745_write16,
write: W90N745_write,
write32: W90N745_write32,
copy_to: W90N745_copy_to
};
/*
* MTD 'PARTITIONING' STUFF
*/
static struct mtd_partition W90N745_partitions[] = {
{
name: "images 3M",
size: 0x300000,
offset: 0
}, {
/*if jffs2 can run on this partition the size can not less than 6 sectors*/
name: "user 1M",
size: 0x100000,
offset: 0x00300000 //offset
}
};
int __init init_POS_FLASH(void)
{
W90N745_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
if (!W90N745_map.map_priv_1) {
printk("Failed to ioremap\n");
return -EIO;
}
mymtd = do_map_probe("cfi_probe", &W90N745_map);
if (mymtd) {
// mymtd->owner = THIS_MODULE;
return add_mtd_partitions(mymtd, W90N745_partitions, sizeof(W90N745_partitions) / sizeof(struct mtd_partition));
}
iounmap((void *)W90N745_map.map_priv_1);
return -ENXIO;
}
static void __exit cleanup_POS_FLASH(void)
{
if (mymtd) {
del_mtd_partitions(mymtd);
map_destroy(mymtd);
}
if (W90N745_map.map_priv_1) {
iounmap((void *)W90N745_map.map_priv_1);
W90N745_map.map_priv_1 = 0;
}
}
module_init(init_POS_FLASH);
module_exit(cleanup_POS_FLASH);
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