diff options
Diffstat (limited to 'tools/firmware-utils/src')
| -rw-r--r-- | tools/firmware-utils/src/nand_ecc.c | 408 |
1 files changed, 204 insertions, 204 deletions
diff --git a/tools/firmware-utils/src/nand_ecc.c b/tools/firmware-utils/src/nand_ecc.c index e270480d7..b1e930515 100644 --- a/tools/firmware-utils/src/nand_ecc.c +++ b/tools/firmware-utils/src/nand_ecc.c @@ -1,204 +1,204 @@ -/*
- * calculate ecc code for nand flash
- *
- * Copyright (C) 2008 yajin <yajin@vm-kernel.org>
- * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 or
- * (at your option) version 3 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-
-#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;
-}
-
+/* + * calculate ecc code for nand flash + * + * Copyright (C) 2008 yajin <yajin@vm-kernel.org> + * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 or + * (at your option) version 3 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + + +#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; +} + |