/* Overhauled routines for dealing with different mmap regions of flash *//* $Id: map.h,v 1.27 2002/02/21 08:26:59 dwmw2 Exp $ */#ifndef __LINUX_MTD_MAP_H__#define __LINUX_MTD_MAP_H__#include <linux/config.h>#include <linux/types.h>#include <linux/mtd/mtd.h>#include <linux/slab.h>/* The map stuff is very simple. You fill in your struct map_info with   a handful of routines for accessing the device, making sure they handle   paging etc. correctly if your device needs it. Then you pass it off   to a chip driver which deals with a mapped device - generally either   do_cfi_probe() or do_ram_probe(), either of which will return a    struct mtd_info if they liked what they saw. At which point, you   fill in the mtd->module with your own module address, and register    it.      The mtd->priv field will point to the struct map_info, and any further   private data required by the chip driver is linked from the    mtd->priv->fldrv_priv field. This allows the map driver to get at    the destructor function map->fldrv_destroy() when it's tired   of living.*/struct map_info {	char *name;	unsigned long size;	int buswidth; /* in octets */	__u8 (*read8)(struct map_info *, unsigned long);	__u16 (*read16)(struct map_info *, unsigned long);	__u32 (*read32)(struct map_info *, unsigned long);  	__u64 (*read64)(struct map_info *, unsigned long);  	/* If it returned a 'long' I'd call it readl.	 * It doesn't.	 * I won't.	 * dwmw2 */		void (*copy_from)(struct map_info *, void *, unsigned long, ssize_t);	void (*write8)(struct map_info *, __u8, unsigned long);	void (*write16)(struct map_info *, __u16, unsigned long);	void (*write32)(struct map_info *, __u32, unsigned long);	void (*write64)(struct map_info *, __u64, unsigned long);	void (*copy_to)(struct map_info *, unsigned long, const void *, ssize_t);	void (*set_vpp)(struct map_info *, int);	/* We put these two here rather than a single void *map_priv, 	   because we want mappers to be able to have quickly-accessible	   cache for the 'currently-mapped page' without the _extra_	   redirection that would be necessary. If you need more than	   two longs, turn the second into a pointer. dwmw2 */	unsigned long map_priv_1;	unsigned long map_priv_2;	void *fldrv_priv;	struct mtd_chip_driver *fldrv;};struct mtd_chip_driver {	struct mtd_info *(*probe)(struct map_info *map);	void (*destroy)(struct mtd_info *);	struct module *module;	char *name;	struct list_head list;};void register_mtd_chip_driver(struct mtd_chip_driver *);void unregister_mtd_chip_driver(struct mtd_chip_driver *);struct mtd_info *do_map_probe(const char *name, struct map_info *map);/* * Destroy an MTD device which was created for a map device. * Make sure the MTD device is already unregistered before calling this */static inline void map_destroy(struct mtd_info *mtd){	struct map_info *map = mtd->priv;	if (map->fldrv->destroy)		map->fldrv->destroy(mtd);#ifdef CONFIG_MODULES	if (map->fldrv->module)		__MOD_DEC_USE_COUNT(map->fldrv->module);#endif	kfree(mtd);}#define ENABLE_VPP(map) do { if(map->set_vpp) map->set_vpp(map, 1); } while(0)#define DISABLE_VPP(map) do { if(map->set_vpp) map->set_vpp(map, 0); } while(0)#endif /* __LINUX_MTD_MAP_H__ */