diff options
Diffstat (limited to 'tools/firmware-utils/src/nand_ecc.c')
| -rw-r--r-- | tools/firmware-utils/src/nand_ecc.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/tools/firmware-utils/src/nand_ecc.c b/tools/firmware-utils/src/nand_ecc.c deleted file mode 100644 index 7189278011..0000000000 --- a/tools/firmware-utils/src/nand_ecc.c +++ /dev/null @@ -1,190 +0,0 @@ -// 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; -} - |