diff options
Diffstat (limited to 'common/env_nand.c')
| -rw-r--r-- | common/env_nand.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/common/env_nand.c b/common/env_nand.c index 50bc111..a5e1038 100644 --- a/common/env_nand.c +++ b/common/env_nand.c @@ -38,6 +38,7 @@ #include <linux/stddef.h> #include <malloc.h> #include <nand.h> +#include <asm/errno.h> #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND) #define CMD_SAVEENV @@ -284,6 +285,38 @@ int readenv (size_t offset, u_char * buf) return 0; } +#ifdef CONFIG_ENV_OFFSET_OOB +int get_nand_env_oob(nand_info_t *nand, unsigned long *result) +{ + struct mtd_oob_ops ops; + uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)]; + int ret; + + ops.datbuf = NULL; + ops.mode = MTD_OOB_AUTO; + ops.ooboffs = 0; + ops.ooblen = ENV_OFFSET_SIZE; + ops.oobbuf = (void *) oob_buf; + + ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops); + if (ret) { + printf("error reading OOB block 0\n"); + return ret; + } + + if (oob_buf[0] == ENV_OOB_MARKER) { + *result = oob_buf[1] * nand->erasesize; + } else if (oob_buf[0] == ENV_OOB_MARKER_OLD) { + *result = oob_buf[1]; + } else { + printf("No dynamic environment marker in OOB block 0\n"); + return -ENOENT; + } + + return 0; +} +#endif + #ifdef CONFIG_ENV_OFFSET_REDUND void env_relocate_spec (void) { @@ -353,6 +386,17 @@ void env_relocate_spec (void) #if !defined(ENV_IS_EMBEDDED) int ret; +#if defined(CONFIG_ENV_OFFSET_OOB) + ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset); + /* If unable to read environment offset from NAND OOB then fall through + * to the normal environment reading code below + */ + if (!ret) + printf("Found Environment offset in OOB..\n"); + else + return use_default(); +#endif + ret = readenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr); if (ret) return use_default(); |