linux/drivers/mtd/nand/sm_common.c
Maxim Levitsky c3611570dd mtd: sm_common: split smartmedia and xD table
2GB xD card, and 4MB SmartMedia ROM card share same ID, so to make both work
split xD and smartmedia ID tables.

Hardware driver must be able to know which type it handles (and probably just one).

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-05-14 01:03:46 +01:00

148 lines
4.6 KiB
C

/*
* Copyright © 2009 - Maxim Levitsky
* Common routines & support for xD format
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/mtd/nand.h>
#include "sm_common.h"
static struct nand_ecclayout nand_oob_sm = {
.eccbytes = 6,
.eccpos = {8, 9, 10, 13, 14, 15},
.oobfree = {
{.offset = 0 , .length = 4}, /* reserved */
{.offset = 6 , .length = 2}, /* LBA1 */
{.offset = 11, .length = 2} /* LBA2 */
}
};
/* NOTE: This layout is is not compatabable with SmartMedia, */
/* because the 256 byte devices have page depenent oob layout */
/* However it does preserve the bad block markers */
/* If you use smftl, it will bypass this and work correctly */
/* If you not, then you break SmartMedia compliance anyway */
static struct nand_ecclayout nand_oob_sm_small = {
.eccbytes = 3,
.eccpos = {0, 1, 2},
.oobfree = {
{.offset = 3 , .length = 2}, /* reserved */
{.offset = 6 , .length = 2}, /* LBA1 */
}
};
static int sm_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
struct mtd_oob_ops ops;
struct sm_oob oob;
int ret, error = 0;
memset(&oob, -1, SM_OOB_SIZE);
oob.block_status = 0x0F;
/* As long as this function is called on erase block boundaries
it will work correctly for 256 byte nand */
ops.mode = MTD_OOB_PLACE;
ops.ooboffs = 0;
ops.ooblen = mtd->oobsize;
ops.oobbuf = (void *)&oob;
ops.datbuf = NULL;
ret = mtd->write_oob(mtd, ofs, &ops);
if (ret < 0 || ops.oobretlen != SM_OOB_SIZE) {
printk(KERN_NOTICE
"sm_common: can't mark sector at %i as bad\n",
(int)ofs);
error = -EIO;
} else
mtd->ecc_stats.badblocks++;
return error;
}
static struct nand_flash_dev nand_smartmedia_flash_ids[] = {
{"SmartMedia 1MiB 5V", 0x6e, 256, 1, 0x1000, 0},
{"SmartMedia 1MiB 3,3V", 0xe8, 256, 1, 0x1000, 0},
{"SmartMedia 1MiB 3,3V", 0xec, 256, 1, 0x1000, 0},
{"SmartMedia 2MiB 3,3V", 0xea, 256, 2, 0x1000, 0},
{"SmartMedia 2MiB 5V", 0x64, 256, 2, 0x1000, 0},
{"SmartMedia 2MiB 3,3V ROM", 0x5d, 512, 2, 0x2000, NAND_ROM},
{"SmartMedia 4MiB 3,3V", 0xe3, 512, 4, 0x2000, 0},
{"SmartMedia 4MiB 3,3/5V", 0xe5, 512, 4, 0x2000, 0},
{"SmartMedia 4MiB 5V", 0x6b, 512, 4, 0x2000, 0},
{"SmartMedia 4MiB 3,3V ROM", 0xd5, 512, 4, 0x2000, NAND_ROM},
{"SmartMedia 8MiB 3,3V", 0xe6, 512, 8, 0x2000, 0},
{"SmartMedia 8MiB 3,3V ROM", 0xd6, 512, 8, 0x2000, NAND_ROM},
{"SmartMedia 16MiB 3,3V", 0x73, 512, 16, 0x4000, 0},
{"SmartMedia 16MiB 3,3V ROM", 0x57, 512, 16, 0x4000, NAND_ROM},
{"SmartMedia 32MiB 3,3V", 0x75, 512, 32, 0x4000, 0},
{"SmartMedia 32MiB 3,3V ROM", 0x58, 512, 32, 0x4000, NAND_ROM},
{"SmartMedia 64MiB 3,3V", 0x76, 512, 64, 0x4000, 0},
{"SmartMedia 64MiB 3,3V ROM", 0xd9, 512, 64, 0x4000, NAND_ROM},
{"SmartMedia 128MiB 3,3V", 0x79, 512, 128, 0x4000, 0},
{"SmartMedia 128MiB 3,3V ROM", 0xda, 512, 128, 0x4000, NAND_ROM},
{"SmartMedia 256MiB 3,3V", 0x71, 512, 256, 0x4000 },
{"SmartMedia 256MiB 3,3V ROM", 0x5b, 512, 256, 0x4000, NAND_ROM},
{NULL,}
};
#define XD_TYPEM (NAND_NO_AUTOINCR | NAND_BROKEN_XD)
static struct nand_flash_dev nand_xd_flash_ids[] = {
{"xD 16MiB 3,3V", 0x73, 512, 16, 0x4000, 0},
{"xD 32MiB 3,3V", 0x75, 512, 32, 0x4000, 0},
{"xD 64MiB 3,3V", 0x76, 512, 64, 0x4000, 0},
{"xD 128MiB 3,3V", 0x79, 512, 128, 0x4000, 0},
{"xD 256MiB 3,3V", 0x71, 512, 256, 0x4000, XD_TYPEM},
{"xD 512MiB 3,3V", 0xdc, 512, 512, 0x4000, XD_TYPEM},
{"xD 1GiB 3,3V", 0xd3, 512, 1024, 0x4000, XD_TYPEM},
{"xD 2GiB 3,3V", 0xd5, 512, 2048, 0x4000, XD_TYPEM},
{NULL,}
};
int sm_register_device(struct mtd_info *mtd, int smartmedia)
{
struct nand_chip *chip = (struct nand_chip *)mtd->priv;
int ret;
chip->options |= NAND_SKIP_BBTSCAN;
/* Scan for card properties */
ret = nand_scan_ident(mtd, 1, smartmedia ?
nand_smartmedia_flash_ids : nand_xd_flash_ids);
if (ret)
return ret;
/* Bad block marker postion */
chip->badblockpos = 0x05;
chip->badblockbits = 7;
chip->block_markbad = sm_block_markbad;
/* ECC layout */
if (mtd->writesize == SM_SECTOR_SIZE)
chip->ecc.layout = &nand_oob_sm;
else if (mtd->writesize == SM_SMALL_PAGE)
chip->ecc.layout = &nand_oob_sm_small;
else
return -ENODEV;
ret = nand_scan_tail(mtd);
if (ret)
return ret;
return add_mtd_device(mtd);
}
EXPORT_SYMBOL_GPL(sm_register_device);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Maxim Levitsky <maximlevitsky@gmail.com>");
MODULE_DESCRIPTION("Common SmartMedia/xD functions");