rpxlite.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- /*
- * $Id: rpxlite.c,v 1.15 2001/10/02 15:05:14 dwmw2 Exp $
- *
- * Handle mapping of the flash on the RPX Lite and CLLF boards
- */
- #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 0xfe000000
- #define WINDOW_SIZE 0x800000
- static struct mtd_info *mymtd;
- __u8 rpxlite_read8(struct map_info *map, unsigned long ofs)
- {
- return __raw_readb(map->map_priv_1 + ofs);
- }
- __u16 rpxlite_read16(struct map_info *map, unsigned long ofs)
- {
- return __raw_readw(map->map_priv_1 + ofs);
- }
- __u32 rpxlite_read32(struct map_info *map, unsigned long ofs)
- {
- return __raw_readl(map->map_priv_1 + ofs);
- }
- void rpxlite_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
- {
- memcpy_fromio(to, (void *)(map->map_priv_1 + from), len);
- }
- void rpxlite_write8(struct map_info *map, __u8 d, unsigned long adr)
- {
- __raw_writeb(d, map->map_priv_1 + adr);
- mb();
- }
- void rpxlite_write16(struct map_info *map, __u16 d, unsigned long adr)
- {
- __raw_writew(d, map->map_priv_1 + adr);
- mb();
- }
- void rpxlite_write32(struct map_info *map, __u32 d, unsigned long adr)
- {
- __raw_writel(d, map->map_priv_1 + adr);
- mb();
- }
- void rpxlite_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
- {
- memcpy_toio((void *)(map->map_priv_1 + to), from, len);
- }
- struct map_info rpxlite_map = {
- name: "RPX",
- size: WINDOW_SIZE,
- buswidth: 4,
- read8: rpxlite_read8,
- read16: rpxlite_read16,
- read32: rpxlite_read32,
- copy_from: rpxlite_copy_from,
- write8: rpxlite_write8,
- write16: rpxlite_write16,
- write32: rpxlite_write32,
- copy_to: rpxlite_copy_to
- };
- int __init init_rpxlite(void)
- {
- printk(KERN_NOTICE "RPX Lite or CLLF flash device: %x at %xn", WINDOW_SIZE*4, WINDOW_ADDR);
- rpxlite_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
- if (!rpxlite_map.map_priv_1) {
- printk("Failed to ioremapn");
- return -EIO;
- }
- mymtd = do_map_probe("cfi_probe", &rpxlite_map);
- if (mymtd) {
- mymtd->module = THIS_MODULE;
- add_mtd_device(mymtd);
- return 0;
- }
- iounmap((void *)rpxlite_map.map_priv_1);
- return -ENXIO;
- }
- static void __exit cleanup_rpxlite(void)
- {
- if (mymtd) {
- del_mtd_device(mymtd);
- map_destroy(mymtd);
- }
- if (rpxlite_map.map_priv_1) {
- iounmap((void *)rpxlite_map.map_priv_1);
- rpxlite_map.map_priv_1 = 0;
- }
- }
- module_init(init_rpxlite);
- module_exit(cleanup_rpxlite);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Arnold Christensen <AKC@pel.dk>");
- MODULE_DESCRIPTION("MTD map driver for RPX Lite and CLLF boards");