+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
-/*
- * calculate ecc code for nand flash
- *
- * Copyright (C) 2008 yajin <yajin@vm-kernel.org>
- * Copyright (C) 2009 Felix Fietkau <nbd@nbd.name>
- */
-
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <fcntl.h>
-#include <stdio.h>
-
-#define DEF_NAND_PAGE_SIZE 2048
-#define DEF_NAND_OOB_SIZE 64
-#define DEF_NAND_ECC_OFFSET 0x28
-
-static int page_size = DEF_NAND_PAGE_SIZE;
-static int oob_size = DEF_NAND_OOB_SIZE;
-static int ecc_offset = DEF_NAND_ECC_OFFSET;
-
-/*
- * Pre-calculated 256-way 1 byte column parity
- */
-static const uint8_t nand_ecc_precalc_table[] = {
- 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
- 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
- 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
- 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
- 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
- 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
- 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
- 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
- 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
- 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
- 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
- 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
- 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
- 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
- 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
- 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00
-};
-
-/**
- * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256-byte block
- * @dat: raw data
- * @ecc_code: buffer for ECC
- */
-int nand_calculate_ecc(const uint8_t *dat,
- uint8_t *ecc_code)
-{
- uint8_t idx, reg1, reg2, reg3, tmp1, tmp2;
- int i;
-
- /* Initialize variables */
- reg1 = reg2 = reg3 = 0;
-
- /* Build up column parity */
- for(i = 0; i < 256; i++) {
- /* Get CP0 - CP5 from table */
- idx = nand_ecc_precalc_table[*dat++];
- reg1 ^= (idx & 0x3f);
-
- /* All bit XOR = 1 ? */
- if (idx & 0x40) {
- reg3 ^= (uint8_t) i;
- reg2 ^= ~((uint8_t) i);
- }
- }
-
- /* Create non-inverted ECC code from line parity */
- tmp1 = (reg3 & 0x80) >> 0; /* B7 -> B7 */
- tmp1 |= (reg2 & 0x80) >> 1; /* B7 -> B6 */
- tmp1 |= (reg3 & 0x40) >> 1; /* B6 -> B5 */
- tmp1 |= (reg2 & 0x40) >> 2; /* B6 -> B4 */
- tmp1 |= (reg3 & 0x20) >> 2; /* B5 -> B3 */
- tmp1 |= (reg2 & 0x20) >> 3; /* B5 -> B2 */
- tmp1 |= (reg3 & 0x10) >> 3; /* B4 -> B1 */
- tmp1 |= (reg2 & 0x10) >> 4; /* B4 -> B0 */
-
- tmp2 = (reg3 & 0x08) << 4; /* B3 -> B7 */
- tmp2 |= (reg2 & 0x08) << 3; /* B3 -> B6 */
- tmp2 |= (reg3 & 0x04) << 3; /* B2 -> B5 */
- tmp2 |= (reg2 & 0x04) << 2; /* B2 -> B4 */
- tmp2 |= (reg3 & 0x02) << 2; /* B1 -> B3 */
- tmp2 |= (reg2 & 0x02) << 1; /* B1 -> B2 */
- tmp2 |= (reg3 & 0x01) << 1; /* B0 -> B1 */
- tmp2 |= (reg2 & 0x01) << 0; /* B7 -> B0 */
-
- /* Calculate final ECC code */
-#ifdef CONFIG_MTD_NAND_ECC_SMC
- ecc_code[0] = ~tmp2;
- ecc_code[1] = ~tmp1;
-#else
- ecc_code[0] = ~tmp1;
- ecc_code[1] = ~tmp2;
-#endif
- ecc_code[2] = ((~reg1) << 2) | 0x03;
-
- return 0;
-}
-
-/*
- * usage: bb-nandflash-ecc start_address size
- */
-void usage(const char *prog)
-{
- fprintf(stderr, "Usage: %s [options] <input> <output>\n"
- "Options:\n"
- " -p <pagesize> NAND page size (default: %d)\n"
- " -o <oobsize> NAND OOB size (default: %d)\n"
- " -e <offset> NAND ECC offset (default: %d)\n"
- "\n", prog, DEF_NAND_PAGE_SIZE, DEF_NAND_OOB_SIZE,
- DEF_NAND_ECC_OFFSET);
- exit(1);
-}
-
-/*start_address/size does not include oob
- */
-int main(int argc, char **argv)
-{
- uint8_t *page_data = NULL;
- uint8_t *ecc_data;
- int infd = -1, outfd = -1;
- int ret = 1;
- ssize_t bytes;
- int ch;
-
- while ((ch = getopt(argc, argv, "e:o:p:")) != -1) {
- switch(ch) {
- case 'p':
- page_size = strtoul(optarg, NULL, 0);
- break;
- case 'o':
- oob_size = strtoul(optarg, NULL, 0);
- break;
- case 'e':
- ecc_offset = strtoul(optarg, NULL, 0);
- break;
- default:
- usage(argv[0]);
- }
- }
- argc -= optind;
- if (argc < 2)
- usage(argv[0]);
-
- argv += optind;
-
- infd = open(argv[0], O_RDONLY, 0);
- if (infd < 0) {
- perror("open input file");
- goto out;
- }
-
- outfd = open(argv[1], O_WRONLY|O_CREAT|O_TRUNC, 0644);
- if (outfd < 0) {
- perror("open output file");
- goto out;
- }
-
- page_data = malloc(page_size + oob_size);
-
- while ((bytes = read(infd, page_data, page_size)) == page_size) {
- int j;
-
- ecc_data = page_data + page_size + ecc_offset;
- for (j = 0; j < page_size / 256; j++)
- {
- nand_calculate_ecc(page_data + j * 256, ecc_data);
- ecc_data += 3;
- }
- write(outfd, page_data, page_size + oob_size);
- }
-
- ret = 0;
-out:
- if (infd >= 0)
- close(infd);
- if (outfd >= 0)
- close(outfd);
- if (page_data)
- free(page_data);
- return ret;
-}
-
projects / openwrt / openwrt.git / blobdiff