diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/flash/nand.c | 61 | ||||
| -rw-r--r-- | src/flash/nand.h | 12 |
2 files changed, 68 insertions, 5 deletions
diff --git a/src/flash/nand.c b/src/flash/nand.c index 7946e344..6977b68a 100644 --- a/src/flash/nand.c +++ b/src/flash/nand.c @@ -186,6 +186,39 @@ nand_manufacturer_t nand_manuf_ids[] = {0x0, NULL}, }; +/* + * Define default oob placement schemes for large and small page devices + */ + +nand_ecclayout_t nand_oob_8 = { + .eccbytes = 3, + .eccpos = {0, 1, 2}, + .oobfree = { + {.offset = 3, + .length = 2}, + {.offset = 6, + .length = 2}} +}; + +nand_ecclayout_t nand_oob_16 = { + .eccbytes = 6, + .eccpos = {0, 1, 2, 3, 6, 7}, + .oobfree = { + {.offset = 8, + . length = 8}} +}; + +nand_ecclayout_t nand_oob_64 = { + .eccbytes = 24, + .eccpos = { + 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, + 56, 57, 58, 59, 60, 61, 62, 63}, + .oobfree = { + {.offset = 2, + .length = 38}} +}; + /* nand device <nand_controller> [controller options] */ int handle_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) @@ -1291,6 +1324,7 @@ int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cmd, char u32 page_size = 0; u8 *oob = NULL; u32 oob_size = 0; + const int *eccpos = NULL; offset = strtoul(args[2], NULL, 0); @@ -1303,6 +1337,8 @@ int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cmd, char oob_format |= NAND_OOB_RAW; else if (!strcmp(args[i], "oob_only")) oob_format |= NAND_OOB_RAW | NAND_OOB_ONLY; + else if (!strcmp(args[i], "oob_softecc")) + oob_format |= NAND_OOB_SW_ECC; else { command_print(cmd_ctx, "unknown option: %s", args[i]); @@ -1326,12 +1362,15 @@ int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cmd, char page = malloc(p->page_size); } - if (oob_format & NAND_OOB_RAW) + if (oob_format & (NAND_OOB_RAW | NAND_OOB_SW_ECC)) { - if (p->page_size == 512) + if (p->page_size == 512) { oob_size = 16; - else if (p->page_size == 2048) + eccpos = nand_oob_16.eccpos; + } else if (p->page_size == 2048) { oob_size = 64; + eccpos = nand_oob_64.eccpos; + } oob = malloc(oob_size); } @@ -1357,8 +1396,20 @@ int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cmd, char memset(page + size_read, 0xff, page_size - size_read); } } - - if (NULL != oob) + + if (oob_format & NAND_OOB_SW_ECC) + { + int i, j; + u8 ecc[3]; + memset(oob, 0xff, oob_size); + for (i = 0, j = 0; i < page_size; i += 256) { + nand_calculate_ecc(p, page+i, ecc); + oob[eccpos[j++]] = ecc[0]; + oob[eccpos[j++]] = ecc[1]; + oob[eccpos[j++]] = ecc[2]; + } + } + else if (NULL != oob) { fileio_read(&fileio, oob_size, oob, &size_read); buf_cnt -= size_read; diff --git a/src/flash/nand.h b/src/flash/nand.h index 5535221a..bd9554c3 100644 --- a/src/flash/nand.h +++ b/src/flash/nand.h @@ -56,6 +56,18 @@ typedef struct nand_block_s int is_bad; } nand_block_t; +struct nand_oobfree { + int offset; + int length; +}; + +typedef struct nand_ecclayout_s { + int eccbytes; + int eccpos[64]; + int oobavail; + struct nand_oobfree oobfree[2]; +} nand_ecclayout_t; + typedef struct nand_device_s { nand_flash_controller_t *controller; |