1537078d8f
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
276 lines
6.1 KiB
C
276 lines
6.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2009-2012 Semihalf
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/malloc.h>
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#include <sys/bus.h>
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#include <dev/nand/nand.h>
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#include "nand_if.h"
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#define BBT_PRIMARY_PATTERN 0x01020304
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#define BBT_SECONDARY_PATTERN 0x05060708
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enum bbt_place {
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BBT_NONE,
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BBT_PRIMARY,
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BBT_SECONDARY
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};
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struct nand_bbt {
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struct nand_chip *chip;
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uint32_t primary_map;
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uint32_t secondary_map;
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enum bbt_place active;
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struct bbt_header *hdr;
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uint32_t tab_len;
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uint32_t *table;
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};
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struct bbt_header {
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uint32_t pattern;
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int32_t seq_nr;
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};
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static int nand_bbt_save(struct nand_bbt *);
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static int nand_bbt_load_hdr(struct nand_bbt *, struct bbt_header *, int8_t);
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static int nand_bbt_load_table(struct nand_bbt *);
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static int nand_bbt_prescan(struct nand_bbt *);
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int
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nand_init_bbt(struct nand_chip *chip)
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{
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struct chip_geom *cg;
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struct nand_bbt *bbt;
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int err;
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cg = &chip->chip_geom;
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bbt = malloc(sizeof(struct nand_bbt), M_NAND, M_ZERO | M_WAITOK);
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if (!bbt) {
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device_printf(chip->dev,
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"Cannot allocate memory for bad block struct");
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return (ENOMEM);
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}
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bbt->chip = chip;
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bbt->active = BBT_NONE;
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bbt->primary_map = cg->chip_size - cg->block_size;
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bbt->secondary_map = cg->chip_size - 2 * cg->block_size;
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bbt->tab_len = cg->blks_per_chip * sizeof(uint32_t);
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bbt->hdr = malloc(sizeof(struct bbt_header) + bbt->tab_len, M_NAND,
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M_WAITOK);
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if (!bbt->hdr) {
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device_printf(chip->dev, "Cannot allocate %d bytes for BB "
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"Table", bbt->tab_len);
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free(bbt, M_NAND);
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return (ENOMEM);
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}
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bbt->hdr->seq_nr = 0;
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bbt->table = (uint32_t *)((uint8_t *)bbt->hdr +
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sizeof(struct bbt_header));
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err = nand_bbt_load_table(bbt);
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if (err) {
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free(bbt->table, M_NAND);
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free(bbt, M_NAND);
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return (err);
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}
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chip->bbt = bbt;
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if (bbt->active == BBT_NONE) {
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bbt->active = BBT_PRIMARY;
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memset(bbt->table, 0xff, bbt->tab_len);
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nand_bbt_prescan(bbt);
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nand_bbt_save(bbt);
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} else
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device_printf(chip->dev, "Found BBT table for chip\n");
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return (0);
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}
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void
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nand_destroy_bbt(struct nand_chip *chip)
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{
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if (chip->bbt) {
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nand_bbt_save(chip->bbt);
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free(chip->bbt->hdr, M_NAND);
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free(chip->bbt, M_NAND);
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chip->bbt = NULL;
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}
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}
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int
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nand_update_bbt(struct nand_chip *chip)
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{
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nand_bbt_save(chip->bbt);
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return (0);
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}
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static int
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nand_bbt_save(struct nand_bbt *bbt)
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{
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enum bbt_place next;
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uint32_t addr;
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int32_t err;
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if (bbt->active == BBT_PRIMARY) {
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addr = bbt->secondary_map;
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bbt->hdr->pattern = BBT_SECONDARY_PATTERN;
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next = BBT_SECONDARY;
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} else {
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addr = bbt->primary_map;
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bbt->hdr->pattern = BBT_PRIMARY_PATTERN;
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next = BBT_PRIMARY;
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}
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err = nand_erase_blocks(bbt->chip, addr,
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bbt->chip->chip_geom.block_size);
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if (err)
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return (err);
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bbt->hdr->seq_nr++;
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err = nand_prog_pages_raw(bbt->chip, addr, bbt->hdr,
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bbt->tab_len + sizeof(struct bbt_header));
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if (err)
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return (err);
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bbt->active = next;
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return (0);
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}
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static int
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nand_bbt_load_hdr(struct nand_bbt *bbt, struct bbt_header *hdr, int8_t primary)
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{
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uint32_t addr;
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if (primary)
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addr = bbt->primary_map;
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else
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addr = bbt->secondary_map;
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return (nand_read_pages_raw(bbt->chip, addr, hdr,
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sizeof(struct bbt_header)));
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}
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static int
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nand_bbt_load_table(struct nand_bbt *bbt)
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{
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struct bbt_header hdr1, hdr2;
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uint32_t address = 0;
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int err = 0;
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bzero(&hdr1, sizeof(hdr1));
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bzero(&hdr2, sizeof(hdr2));
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nand_bbt_load_hdr(bbt, &hdr1, 1);
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if (hdr1.pattern == BBT_PRIMARY_PATTERN) {
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bbt->active = BBT_PRIMARY;
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address = bbt->primary_map;
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} else
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bzero(&hdr1, sizeof(hdr1));
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nand_bbt_load_hdr(bbt, &hdr2, 0);
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if ((hdr2.pattern == BBT_SECONDARY_PATTERN) &&
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(hdr2.seq_nr > hdr1.seq_nr)) {
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bbt->active = BBT_SECONDARY;
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address = bbt->secondary_map;
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} else
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bzero(&hdr2, sizeof(hdr2));
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if (bbt->active != BBT_NONE)
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err = nand_read_pages_raw(bbt->chip, address, bbt->hdr,
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bbt->tab_len + sizeof(struct bbt_header));
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return (err);
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}
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static int
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nand_bbt_prescan(struct nand_bbt *bbt)
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{
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int32_t i;
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uint8_t bad;
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bool printed_hash = 0;
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device_printf(bbt->chip->dev, "No BBT found. Prescan chip...\n");
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for (i = 0; i < bbt->chip->chip_geom.blks_per_chip; i++) {
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if (NAND_IS_BLK_BAD(bbt->chip->dev, i, &bad))
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return (ENXIO);
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if (bad) {
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device_printf(bbt->chip->dev, "Bad block(%d)\n", i);
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bbt->table[i] = 0x0FFFFFFF;
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}
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if (!(i % 100)) {
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printf("#");
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printed_hash = 1;
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}
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}
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if (printed_hash)
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printf("\n");
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return (0);
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}
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int
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nand_check_bad_block(struct nand_chip *chip, uint32_t block_number)
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{
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if (!chip || !chip->bbt)
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return (0);
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if ((chip->bbt->table[block_number] & 0xF0000000) == 0)
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return (1);
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return (0);
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}
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int
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nand_mark_bad_block(struct nand_chip *chip, uint32_t block_number)
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{
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chip->bbt->table[block_number] = 0x0FFFFFFF;
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return (0);
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}
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