wh5307 mtd maps 下 样例 点击：729 | 回复：0
发表于：2004-02-25 16:29:00
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/*
* Normal mappings of chips on wh5307 in physical memory
*/
#include
#include
#include
#include
#include
#include
#include
#include
#define WINDOW_ADDR 0xf0000000
#define WINDOW_SIZE 0x200000
#define BUSWIDTH 2
static struct mtd_info *whmtd;
__u8 wh5307_read8(struct map_info *map, unsigned long ofs)
{
return __raw_readb(map->map_priv_1 + ofs);
}
__u16 wh5307_read16(struct map_info *map, unsigned long ofs)
{
return __raw_readw(map->map_priv_1 + ofs);
}
__u32 wh5307_read32(struct map_info *map, unsigned long ofs)
{
return __raw_readl(map->map_priv_1 + ofs);
}
void wh5307_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
memcpy(to, (void *)(map->map_priv_1 + from), len);
}
void wh5307_write8(struct map_info *map, __u8 d, unsigned long adr)
{
__raw_writeb(d, map->map_priv_1 + adr);
}
void wh5307_write16(struct map_info *map, __u16 d, unsigned long adr)
{
__raw_writew(d, map->map_priv_1 + adr);
}
void wh5307_write32(struct map_info *map, __u32 d, unsigned long adr)
{
__raw_writel(d, map->map_priv_1 + adr);
}
void wh5307_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
{
memcpy((void *)(map->map_priv_1 + to), from, len);
}
struct map_info wh5307_map = {
name: "wh5307 flash device",
size: WINDOW_SIZE,
buswidth: BUSWIDTH,
read8: wh5307_read8,
read16: wh5307_read16,
read32: wh5307_read32,
copy_from: wh5307_copy_from,
write8: wh5307_write8,
write16: wh5307_write16,
write32: wh5307_write32,
copy_to: wh5307_copy_to
};
static struct mtd_partition wh5307_partitions[] = {
{
name: "reserved for kennel (1.5M)",
size: 0x180000,
offset: 0x0,
mask_flags: MTD_WRITEABLE
},
{
name: "used for jffs2 (512k)",
size: 0x80000,
offset: 0x180000
}
};
int __init init_wh5307(void)
{
printk(KERN_NOTICE "wh5307 flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
wh5307_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
if (!wh5307_map.map_priv_1) {
printk("Failed to ioremap\n");
return -EIO;
}
whmtd = do_map_probe("jedec_probe", &wh5307_map);
if (whmtd) {
whmtd->module = THIS_MODULE;
whmtd->erasesize = 0x1000;
return add_mtd_partitions(whmtd, wh5307_partitions, sizeof(wh5307_partitions) / sizeof(struct mtd_partition));
}
iounmap((void *)wh5307_map.map_priv_1);
return -ENXIO;
}
static void __exit cleanup_wh5307(void)
{
if (whmtd) {
del_mtd_partitions(whmtd);
map_destroy(whmtd);
}
if (wh5307_map.map_priv_1) {
iounmap((void *)wh5307_map.map_priv_1);
wh5307_map.map_priv_1 = 0;
}
}
module_init(init_wh5307);
module_exit(cleanup_wh5307);
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