* and/or modified under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
+ *
+ * The function nand_biterror() in this file is inspired from
+ * mtd-utils/nand-utils/nandflipbits.c which was released under GPLv2
+ * only
*/
#include <common.h>
+#include <bootstage.h>
#include <image.h>
+#include <asm/cache.h>
#include <linux/mtd/mtd.h>
+#include <linux/mtd/rawnand.h>
#include <command.h>
#include <console.h>
#include <env.h>
u8 *part_num, struct part_info **part);
#endif
+#define MAX_NUM_PAGES 64
+
+static int nand_biterror(struct mtd_info *mtd, ulong off, int bit)
+{
+ int ret = 0;
+ int page = 0;
+ ulong block_off;
+ u_char *datbuf[MAX_NUM_PAGES]; /* Data and OOB */
+ u_char data;
+ int pages_per_blk = mtd->erasesize / mtd->writesize;
+ struct erase_info einfo;
+
+ if (pages_per_blk > MAX_NUM_PAGES) {
+ printf("Too many pages in one erase block\n");
+ return 1;
+ }
+
+ if (bit < 0 || bit > 7) {
+ printf("bit position 0 to 7 is allowed\n");
+ return 1;
+ }
+
+ /* Allocate memory */
+ memset(datbuf, 0, sizeof(datbuf));
+ for (page = 0; page < pages_per_blk ; page++) {
+ datbuf[page] = malloc(mtd->writesize + mtd->oobsize);
+ if (!datbuf[page]) {
+ printf("No memory for page buffer\n");
+ ret = -ENOMEM;
+ goto free_memory;
+ }
+ }
+
+ /* Align to erase block boundary */
+ block_off = off & (~(mtd->erasesize - 1));
+
+ /* Read out memory as first step */
+ for (page = 0; page < pages_per_blk ; page++) {
+ struct mtd_oob_ops ops;
+ loff_t addr = (loff_t)block_off;
+
+ memset(&ops, 0, sizeof(ops));
+ ops.datbuf = datbuf[page];
+ ops.oobbuf = datbuf[page] + mtd->writesize;
+ ops.len = mtd->writesize;
+ ops.ooblen = mtd->oobsize;
+ ops.mode = MTD_OPS_RAW;
+ ret = mtd_read_oob(mtd, addr, &ops);
+ if (ret < 0) {
+ printf("Error (%d) reading page %08lx\n",
+ ret, block_off);
+ ret = 1;
+ goto free_memory;
+ }
+ block_off += mtd->writesize;
+ }
+
+ /* Erase the block */
+ memset(&einfo, 0, sizeof(einfo));
+ einfo.mtd = mtd;
+ /* Align to erase block boundary */
+ einfo.addr = (loff_t)(off & (~(mtd->erasesize - 1)));
+ einfo.len = mtd->erasesize;
+ ret = mtd_erase(mtd, &einfo);
+ if (ret < 0) {
+ printf("Error (%d) nand_erase_nand page %08llx\n",
+ ret, einfo.addr);
+ ret = 1;
+ goto free_memory;
+ }
+
+ /* Twist a bit in data part */
+ block_off = off & (mtd->erasesize - 1);
+ data = datbuf[block_off / mtd->writesize][block_off % mtd->writesize];
+ data ^= (1 << bit);
+ datbuf[block_off / mtd->writesize][block_off % mtd->writesize] = data;
+
+ printf("Flip data at 0x%lx with xor 0x%02x (bit=%d) to value=0x%02x\n",
+ off, (1 << bit), bit, data);
+
+ /* Write back twisted data and unmodified OOB */
+ /* Align to erase block boundary */
+ block_off = off & (~(mtd->erasesize - 1));
+ for (page = 0; page < pages_per_blk; page++) {
+ struct mtd_oob_ops ops;
+ loff_t addr = (loff_t)block_off;
+
+ memset(&ops, 0, sizeof(ops));
+ ops.datbuf = datbuf[page];
+ ops.oobbuf = datbuf[page] + mtd->writesize;
+ ops.len = mtd->writesize;
+ ops.ooblen = mtd->oobsize;
+ ops.mode = MTD_OPS_RAW;
+ ret = mtd_write_oob(mtd, addr, &ops);
+ if (ret < 0) {
+ printf("Error (%d) write page %08lx\n", ret, block_off);
+ ret = 1;
+ goto free_memory;
+ }
+ block_off += mtd->writesize;
+ }
+
+free_memory:
+ for (page = 0; page < pages_per_blk ; page++) {
+ if (datbuf[page])
+ free(datbuf[page]);
+ }
+ return ret;
+}
+
static int nand_dump(struct mtd_info *mtd, ulong off, int only_oob,
int repeat)
{
#ifdef CONFIG_ENV_OFFSET_OOB
unsigned long nand_env_oob_offset;
-int do_nand_env_oob(cmd_tbl_t *cmdtp, int argc, char *const argv[])
+int do_nand_env_oob(struct cmd_tbl *cmdtp, int argc, char *const argv[])
{
int ret;
uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
}
}
-static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int do_nand(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
{
int i, ret = 0;
ulong addr;
return 0;
}
- dev = (int)simple_strtoul(argv[2], NULL, 10);
+ dev = (int)dectoul(argv[2], NULL);
set_dev(dev);
return 0;
if (argc < 3)
goto usage;
- off = (int)simple_strtoul(argv[2], NULL, 16);
+ off = (int)hextoul(argv[2], NULL);
ret = nand_dump(mtd, off, !strcmp(&cmd[4], ".oob"), repeat);
return ret == 0 ? 1 : 0;
if (argc < 4)
goto usage;
- addr = (ulong)simple_strtoul(argv[2], NULL, 16);
+ addr = (ulong)hextoul(argv[2], NULL);
read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
printf("\nNAND %s: ", read ? "read" : "write");
goto usage;
while (argc > 0) {
- addr = simple_strtoul(*argv, NULL, 16);
+ addr = hextoul(*argv, NULL);
if (mtd_block_markbad(mtd, addr)) {
printf("block 0x%08lx NOT marked "
}
if (strcmp(cmd, "biterr") == 0) {
- /* todo */
- return 1;
+ int bit;
+
+ if (argc != 4)
+ goto usage;
+
+ off = (int)simple_strtoul(argv[2], NULL, 16);
+ bit = (int)simple_strtoul(argv[3], NULL, 10);
+ ret = nand_biterror(mtd, off, bit);
+ return ret;
}
#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
"nand scrub [-y] off size | scrub.part partition | scrub.chip\n"
" really clean NAND erasing bad blocks (UNSAFE)\n"
"nand markbad off [...] - mark bad block(s) at offset (UNSAFE)\n"
- "nand biterr off - make a bit error at offset (UNSAFE)"
+ "nand biterr off bit - make a bit error at offset and bit position (UNSAFE)"
#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
"\n"
"nand lock [tight] [status]\n"
"NAND sub-system", nand_help_text
);
-static int nand_load_image(cmd_tbl_t *cmdtp, struct mtd_info *mtd,
+static int nand_load_image(struct cmd_tbl *cmdtp, struct mtd_info *mtd,
ulong offset, ulong addr, char *cmd)
{
int r;
#if defined(CONFIG_FIT)
/* This cannot be done earlier, we need complete FIT image in RAM first */
if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
- if (!fit_check_format (fit_hdr)) {
+ if (fit_check_format(fit_hdr, IMAGE_SIZE_INVAL)) {
bootstage_error(BOOTSTAGE_ID_NAND_FIT_READ);
puts ("** Bad FIT image format\n");
return 1;
return bootm_maybe_autostart(cmdtp, cmd);
}
-static int do_nandboot(cmd_tbl_t *cmdtp, int flag, int argc,
- char * const argv[])
+static int do_nandboot(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
{
char *boot_device = NULL;
int idx;
if (argc > 3)
goto usage;
if (argc == 3)
- addr = simple_strtoul(argv[1], NULL, 16);
+ addr = hextoul(argv[1], NULL);
else
addr = CONFIG_SYS_LOAD_ADDR;
boot_device = env_get("bootdevice");
break;
case 2:
- addr = simple_strtoul(argv[1], NULL, 16);
+ addr = hextoul(argv[1], NULL);
boot_device = env_get("bootdevice");
break;
case 3:
- addr = simple_strtoul(argv[1], NULL, 16);
+ addr = hextoul(argv[1], NULL);
boot_device = argv[2];
break;
case 4:
- addr = simple_strtoul(argv[1], NULL, 16);
+ addr = hextoul(argv[1], NULL);
boot_device = argv[2];
- offset = simple_strtoul(argv[3], NULL, 16);
+ offset = hextoul(argv[3], NULL);
break;
default:
#if defined(CONFIG_CMD_MTDPARTS)
}
bootstage_mark(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
- idx = simple_strtoul(boot_device, NULL, 16);
+ idx = hextoul(boot_device, NULL);
mtd = get_nand_dev_by_index(idx);
if (!mtd) {
projects / J-u-boot.git / blobdiff