patch-2.4.6 linux/drivers/mtd/map_ram.c

• Lines: 138
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.5/linux/drivers/mtd/map_ram.c
• Orig date: Fri Feb 9 11:30:23 2001

diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/map_ram.c linux/drivers/mtd/map_ram.c
@@ -1,137 +0,0 @@
-/*
- * Common code to handle map devices which are simple RAM
- * (C) 2000 Red Hat. GPL'd.
- * $Id: map_ram.c,v 1.7 2000/12/10 01:39:13 dwmw2 Exp $
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <asm/io.h>
-#include <asm/byteorder.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-
-#include <linux/mtd/map.h>
-
-
-static int mapram_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
-static int mapram_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
-static int mapram_erase (struct mtd_info *, struct erase_info *);
-static void mapram_nop (struct mtd_info *);
-
-static const char im_name[] = "map_ram_probe";
-
-/* This routine is made available to other mtd code via
- * inter_module_register.  It must only be accessed through
- * inter_module_get which will bump the use count of this module.  The
- * addresses passed back in mtd are valid as long as the use count of
- * this module is non-zero, i.e. between inter_module_get and
- * inter_module_put.  Keith Owens <kaos@ocs.com.au> 29 Oct 2000.
- */
-
-static struct mtd_info *map_ram_probe(struct map_info *map)
-{
-	struct mtd_info *mtd;
-
-	/* Check the first byte is RAM */
-	map->write8(map, 0x55, 0);
-	if (map->read8(map, 0) != 0x55)
-		return NULL;
-
-	map->write8(map, 0xAA, 0);
-	if (map->read8(map, 0) != 0xAA)
-		return NULL;
-
-	/* Check the last byte is RAM */
-	map->write8(map, 0x55, map->size-1);
-	if (map->read8(map, map->size-1) != 0x55)
-		return NULL;
-
-	map->write8(map, 0xAA, map->size-1);
-	if (map->read8(map, map->size-1) != 0xAA)
-		return NULL;
-
-	/* OK. It seems to be RAM. */
-
-	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
-	if (!mtd)
-		return NULL;
-
-	memset(mtd, 0, sizeof(*mtd));
-
-	map->im_name = im_name;
-	map->fldrv_destroy = mapram_nop;
-	mtd->priv = map;
-	mtd->name = map->name;
-	mtd->type = MTD_RAM;
-	mtd->erasesize = 0x10000;
-	mtd->size = map->size;
-	mtd->erase = mapram_erase;
-	mtd->read = mapram_read;
-	mtd->write = mapram_write;
-	mtd->sync = mapram_nop;
-	mtd->flags = MTD_CAP_RAM | MTD_VOLATILE;
-	mtd->erasesize = PAGE_SIZE;
-
-	return mtd;
-}
-
-
-static int mapram_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
-{
-	struct map_info *map = (struct map_info *)mtd->priv;
-
-	map->copy_from(map, buf, from, len);
-	*retlen = len;
-	return 0;
-}
-
-static int mapram_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
-{
-	struct map_info *map = (struct map_info *)mtd->priv;
-
-	map->copy_to(map, to, buf, len);
-	*retlen = len;
-	return 0;
-}
-
-static int mapram_erase (struct mtd_info *mtd, struct erase_info *instr)
-{
-	/* Yeah, it's inefficient. Who cares? It's faster than a _real_
-	   flash erase. */
-	struct map_info *map = (struct map_info *)mtd->priv;
-	unsigned long i;
-
-	for (i=0; i<instr->len; i++)
-		map->write8(map, 0xFF, instr->addr + i);
-
-	if (instr->callback)
-		instr->callback(instr);
-
-	return 0;
-}
-
-static void mapram_nop(struct mtd_info *mtd)
-{
-	/* Nothing to see here */
-}
-
-#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
-#define map_ram_init init_module
-#define map_ram_exit cleanup_module
-#endif
-
-static int __init map_ram_init(void)
-{
-	inter_module_register(im_name, THIS_MODULE, &map_ram_probe);
-	return 0;
-}
-
-static void __exit map_ram_exit(void)
-{
-	inter_module_unregister(im_name);
-}
-
-module_init(map_ram_init);
-module_exit(map_ram_exit);