forked from luck/tmp_suning_uos_patched
59018b6d2a
Once upon a time, the MTD repository was using CVS. This patch therefore removes all usages of the no longer updated CVS keywords from the MTD code. This also includes code that printed them to the user. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
142 lines
3.1 KiB
C
142 lines
3.1 KiB
C
/*
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* Common code to handle map devices which are simple RAM
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* (C) 2000 Red Hat. GPL'd.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <asm/io.h>
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#include <asm/byteorder.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/compatmac.h>
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static int mapram_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
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static int mapram_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
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static int mapram_erase (struct mtd_info *, struct erase_info *);
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static void mapram_nop (struct mtd_info *);
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static struct mtd_info *map_ram_probe(struct map_info *map);
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static struct mtd_chip_driver mapram_chipdrv = {
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.probe = map_ram_probe,
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.name = "map_ram",
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.module = THIS_MODULE
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};
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static struct mtd_info *map_ram_probe(struct map_info *map)
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{
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struct mtd_info *mtd;
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/* Check the first byte is RAM */
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#if 0
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map_write8(map, 0x55, 0);
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if (map_read8(map, 0) != 0x55)
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return NULL;
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map_write8(map, 0xAA, 0);
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if (map_read8(map, 0) != 0xAA)
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return NULL;
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/* Check the last byte is RAM */
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map_write8(map, 0x55, map->size-1);
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if (map_read8(map, map->size-1) != 0x55)
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return NULL;
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map_write8(map, 0xAA, map->size-1);
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if (map_read8(map, map->size-1) != 0xAA)
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return NULL;
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#endif
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/* OK. It seems to be RAM. */
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mtd = kzalloc(sizeof(*mtd), GFP_KERNEL);
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if (!mtd)
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return NULL;
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map->fldrv = &mapram_chipdrv;
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mtd->priv = map;
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mtd->name = map->name;
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mtd->type = MTD_RAM;
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mtd->size = map->size;
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mtd->erase = mapram_erase;
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mtd->read = mapram_read;
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mtd->write = mapram_write;
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mtd->sync = mapram_nop;
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mtd->flags = MTD_CAP_RAM;
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mtd->writesize = 1;
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mtd->erasesize = PAGE_SIZE;
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while(mtd->size & (mtd->erasesize - 1))
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mtd->erasesize >>= 1;
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__module_get(THIS_MODULE);
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return mtd;
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}
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static int mapram_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
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{
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struct map_info *map = mtd->priv;
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map_copy_from(map, buf, from, len);
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*retlen = len;
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return 0;
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}
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static int mapram_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
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{
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struct map_info *map = mtd->priv;
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map_copy_to(map, to, buf, len);
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*retlen = len;
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return 0;
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}
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static int mapram_erase (struct mtd_info *mtd, struct erase_info *instr)
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{
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/* Yeah, it's inefficient. Who cares? It's faster than a _real_
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flash erase. */
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struct map_info *map = mtd->priv;
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map_word allff;
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unsigned long i;
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allff = map_word_ff(map);
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for (i=0; i<instr->len; i += map_bankwidth(map))
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map_write(map, allff, instr->addr + i);
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instr->state = MTD_ERASE_DONE;
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mtd_erase_callback(instr);
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return 0;
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}
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static void mapram_nop(struct mtd_info *mtd)
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{
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/* Nothing to see here */
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}
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static int __init map_ram_init(void)
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{
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register_mtd_chip_driver(&mapram_chipdrv);
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return 0;
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}
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static void __exit map_ram_exit(void)
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{
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unregister_mtd_chip_driver(&mapram_chipdrv);
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}
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module_init(map_ram_init);
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module_exit(map_ram_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
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MODULE_DESCRIPTION("MTD chip driver for RAM chips");
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