274 lines
6.1 KiB
C
274 lines
6.1 KiB
C
|
/*-
|
||
|
* Copyright (c) 2009-2012 Semihalf
|
||
|
* All rights reserved.
|
||
|
*
|
||
|
* Redistribution and use in source and binary forms, with or without
|
||
|
* modification, are permitted provided that the following conditions
|
||
|
* are met:
|
||
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer.
|
||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
* documentation and/or other materials provided with the distribution.
|
||
|
*
|
||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
* SUCH DAMAGE.
|
||
|
*
|
||
|
* $FreeBSD$
|
||
|
*/
|
||
|
|
||
|
#include <sys/cdefs.h>
|
||
|
|
||
|
#include <sys/param.h>
|
||
|
#include <sys/systm.h>
|
||
|
#include <sys/kernel.h>
|
||
|
#include <sys/socket.h>
|
||
|
#include <sys/malloc.h>
|
||
|
#include <sys/bus.h>
|
||
|
|
||
|
#include <dev/nand/nand.h>
|
||
|
|
||
|
#include "nand_if.h"
|
||
|
|
||
|
#define BBT_PRIMARY_PATTERN 0x01020304
|
||
|
#define BBT_SECONDARY_PATTERN 0x05060708
|
||
|
|
||
|
enum bbt_place {
|
||
|
BBT_NONE,
|
||
|
BBT_PRIMARY,
|
||
|
BBT_SECONDARY
|
||
|
};
|
||
|
|
||
|
struct nand_bbt {
|
||
|
struct nand_chip *chip;
|
||
|
uint32_t primary_map;
|
||
|
uint32_t secondary_map;
|
||
|
enum bbt_place active;
|
||
|
struct bbt_header *hdr;
|
||
|
uint32_t tab_len;
|
||
|
uint32_t *table;
|
||
|
};
|
||
|
|
||
|
struct bbt_header {
|
||
|
uint32_t pattern;
|
||
|
int32_t seq_nr;
|
||
|
};
|
||
|
|
||
|
static int nand_bbt_save(struct nand_bbt *);
|
||
|
static int nand_bbt_load_hdr(struct nand_bbt *, struct bbt_header *, int8_t);
|
||
|
static int nand_bbt_load_table(struct nand_bbt *);
|
||
|
static int nand_bbt_prescan(struct nand_bbt *);
|
||
|
|
||
|
int
|
||
|
nand_init_bbt(struct nand_chip *chip)
|
||
|
{
|
||
|
struct chip_geom *cg;
|
||
|
struct nand_bbt *bbt;
|
||
|
int err;
|
||
|
|
||
|
cg = &chip->chip_geom;
|
||
|
|
||
|
bbt = malloc(sizeof(struct nand_bbt), M_NAND, M_ZERO | M_WAITOK);
|
||
|
if (!bbt) {
|
||
|
device_printf(chip->dev,
|
||
|
"Cannot allocate memory for bad block struct");
|
||
|
return (ENOMEM);
|
||
|
}
|
||
|
|
||
|
bbt->chip = chip;
|
||
|
bbt->active = BBT_NONE;
|
||
|
bbt->primary_map = cg->chip_size - cg->block_size;
|
||
|
bbt->secondary_map = cg->chip_size - 2 * cg->block_size;
|
||
|
bbt->tab_len = cg->blks_per_chip * sizeof(uint32_t);
|
||
|
bbt->hdr = malloc(sizeof(struct bbt_header) + bbt->tab_len, M_NAND,
|
||
|
M_WAITOK);
|
||
|
if (!bbt->hdr) {
|
||
|
device_printf(chip->dev, "Cannot allocate %d bytes for BB "
|
||
|
"Table", bbt->tab_len);
|
||
|
free(bbt, M_NAND);
|
||
|
return (ENOMEM);
|
||
|
}
|
||
|
bbt->hdr->seq_nr = 0;
|
||
|
bbt->table = (uint32_t *)((uint8_t *)bbt->hdr +
|
||
|
sizeof(struct bbt_header));
|
||
|
|
||
|
err = nand_bbt_load_table(bbt);
|
||
|
if (err) {
|
||
|
free(bbt->table, M_NAND);
|
||
|
free(bbt, M_NAND);
|
||
|
return (err);
|
||
|
}
|
||
|
|
||
|
chip->bbt = bbt;
|
||
|
if (bbt->active == BBT_NONE) {
|
||
|
bbt->active = BBT_PRIMARY;
|
||
|
memset(bbt->table, 0xff, bbt->tab_len);
|
||
|
nand_bbt_prescan(bbt);
|
||
|
nand_bbt_save(bbt);
|
||
|
} else
|
||
|
device_printf(chip->dev, "Found BBT table for chip\n");
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
nand_destroy_bbt(struct nand_chip *chip)
|
||
|
{
|
||
|
|
||
|
if (chip->bbt) {
|
||
|
nand_bbt_save(chip->bbt);
|
||
|
|
||
|
free(chip->bbt->hdr, M_NAND);
|
||
|
free(chip->bbt, M_NAND);
|
||
|
chip->bbt = NULL;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
int
|
||
|
nand_update_bbt(struct nand_chip *chip)
|
||
|
{
|
||
|
|
||
|
nand_bbt_save(chip->bbt);
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
nand_bbt_save(struct nand_bbt *bbt)
|
||
|
{
|
||
|
enum bbt_place next;
|
||
|
uint32_t addr;
|
||
|
int32_t err;
|
||
|
|
||
|
if (bbt->active == BBT_PRIMARY) {
|
||
|
addr = bbt->secondary_map;
|
||
|
bbt->hdr->pattern = BBT_SECONDARY_PATTERN;
|
||
|
next = BBT_SECONDARY;
|
||
|
} else {
|
||
|
addr = bbt->primary_map;
|
||
|
bbt->hdr->pattern = BBT_PRIMARY_PATTERN;
|
||
|
next = BBT_PRIMARY;
|
||
|
}
|
||
|
|
||
|
err = nand_erase_blocks(bbt->chip, addr,
|
||
|
bbt->chip->chip_geom.block_size);
|
||
|
if (err)
|
||
|
return (err);
|
||
|
|
||
|
bbt->hdr->seq_nr++;
|
||
|
|
||
|
err = nand_prog_pages_raw(bbt->chip, addr, bbt->hdr,
|
||
|
bbt->tab_len + sizeof(struct bbt_header));
|
||
|
if (err)
|
||
|
return (err);
|
||
|
|
||
|
bbt->active = next;
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
nand_bbt_load_hdr(struct nand_bbt *bbt, struct bbt_header *hdr, int8_t primary)
|
||
|
{
|
||
|
uint32_t addr;
|
||
|
|
||
|
if (primary)
|
||
|
addr = bbt->primary_map;
|
||
|
else
|
||
|
addr = bbt->secondary_map;
|
||
|
|
||
|
return (nand_read_pages_raw(bbt->chip, addr, hdr,
|
||
|
sizeof(struct bbt_header)));
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
nand_bbt_load_table(struct nand_bbt *bbt)
|
||
|
{
|
||
|
struct bbt_header hdr1, hdr2;
|
||
|
uint32_t address = 0;
|
||
|
int err = 0;
|
||
|
|
||
|
bzero(&hdr1, sizeof(hdr1));
|
||
|
bzero(&hdr2, sizeof(hdr2));
|
||
|
|
||
|
nand_bbt_load_hdr(bbt, &hdr1, 1);
|
||
|
if (hdr1.pattern == BBT_PRIMARY_PATTERN) {
|
||
|
bbt->active = BBT_PRIMARY;
|
||
|
address = bbt->primary_map;
|
||
|
} else
|
||
|
bzero(&hdr1, sizeof(hdr1));
|
||
|
|
||
|
|
||
|
nand_bbt_load_hdr(bbt, &hdr2, 0);
|
||
|
if ((hdr2.pattern == BBT_SECONDARY_PATTERN) &&
|
||
|
(hdr2.seq_nr > hdr1.seq_nr)) {
|
||
|
bbt->active = BBT_SECONDARY;
|
||
|
address = bbt->secondary_map;
|
||
|
} else
|
||
|
bzero(&hdr2, sizeof(hdr2));
|
||
|
|
||
|
if (bbt->active != BBT_NONE)
|
||
|
err = nand_read_pages_raw(bbt->chip, address, bbt->hdr,
|
||
|
bbt->tab_len + sizeof(struct bbt_header));
|
||
|
|
||
|
return (err);
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
nand_bbt_prescan(struct nand_bbt *bbt)
|
||
|
{
|
||
|
int32_t i;
|
||
|
uint8_t bad;
|
||
|
bool printed_hash = 0;
|
||
|
|
||
|
device_printf(bbt->chip->dev, "No BBT found. Prescan chip...\n");
|
||
|
for (i = 0; i < bbt->chip->chip_geom.blks_per_chip; i++) {
|
||
|
if (NAND_IS_BLK_BAD(bbt->chip->dev, i, &bad))
|
||
|
return (ENXIO);
|
||
|
|
||
|
if (bad) {
|
||
|
device_printf(bbt->chip->dev, "Bad block(%d)\n", i);
|
||
|
bbt->table[i] = 0x0FFFFFFF;
|
||
|
}
|
||
|
if (!(i % 100)) {
|
||
|
printf("#");
|
||
|
printed_hash = 1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (printed_hash)
|
||
|
printf("\n");
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
nand_check_bad_block(struct nand_chip *chip, uint32_t block_number)
|
||
|
{
|
||
|
|
||
|
if (!chip || !chip->bbt)
|
||
|
return (0);
|
||
|
|
||
|
if ((chip->bbt->table[block_number] & 0xF0000000) == 0)
|
||
|
return (1);
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
nand_mark_bad_block(struct nand_chip *chip, uint32_t block_number)
|
||
|
{
|
||
|
|
||
|
chip->bbt->table[block_number] = 0x0FFFFFFF;
|
||
|
|
||
|
return (0);
|
||
|
}
|