diff options
Diffstat (limited to 'drivers/mtd/nand/davinci_nand.c')
| -rw-r--r-- | drivers/mtd/nand/davinci_nand.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index 5d425092f4..a079b1e5cf 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -305,6 +305,189 @@ static struct nand_ecclayout nand_davinci_4bit_layout_oobfirst = { #endif }; +#if defined CONFIG_KEYSTONE_RBL_NAND +#if defined(CONFIG_SYS_NAND_PAGE_2K) +static struct nand_ecclayout nand_keystone_rbl_4bit_layout_oobfirst = { + .eccbytes = 40, + .eccpos = { + 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + }, + .oobfree = { + {.offset = 2, .length = 4, }, + {.offset = 16, .length = 6, }, + {.offset = 32, .length = 6, }, + {.offset = 48, .length = 6, }, + }, +#elif defined(CONFIG_SYS_NAND_PAGE_4K) + .eccbytes = 80, + .eccpos = { + 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, + 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, + 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, + }, + .oobfree = { + {.offset = 2, .length = 4, }, + {.offset = 16, .length = 6, }, + {.offset = 32, .length = 6, }, + {.offset = 48, .length = 6, }, + {.offset = 64, .length = 6, }, + {.offset = 80, .length = 6, }, + {.offset = 96, .length = 6, }, + {.offset = 112, .length = 6, }, + }, +#endif +}; + +#ifdef CONFIG_SYS_NAND_PAGE_2K +#define CONFIG_KEYSTONE_NAND_MAX_RBL_PAGE CONFIG_KEYSTONE_NAND_MAX_RBL_SIZE >> 11 +#elif defined(CONFIG_SYS_NAND_PAGE_4K) +#define CONFIG_KEYSTONE_NAND_MAX_RBL_PAGE CONFIG_KEYSTONE_NAND_MAX_RBL_SIZE >> 12 +#endif + +/** + * nand_davinci_write_page - write one page + * @mtd: MTD device structure + * @chip: NAND chip descriptor + * @buf: the data to write + * @oob_required: must write chip->oob_poi to OOB + * @page: page number to write + * @cached: cached programming + * @raw: use _raw version of write_page + */ +static int nand_davinci_write_page(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf, int oob_required, + int page, int cached, int raw) +{ + int status; + int ret = 0; + struct nand_ecclayout *saved_ecc_layout; + + /* save current ECC layout and assign Keystone RBL ECC layout */ + if (page < CONFIG_KEYSTONE_NAND_MAX_RBL_PAGE) { + saved_ecc_layout = chip->ecc.layout; + chip->ecc.layout = &nand_keystone_rbl_4bit_layout_oobfirst; + mtd->oobavail = chip->ecc.layout->oobavail; + } + + chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); + + if (unlikely(raw)) + status = chip->ecc.write_page_raw(mtd, chip, buf, oob_required); + else + status = chip->ecc.write_page(mtd, chip, buf, oob_required); + + if (status < 0) { + ret = status; + goto err; + } + + chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); + status = chip->waitfunc(mtd, chip); + + /* + * See if operation failed and additional status checks are + * available. + */ + if ((status & NAND_STATUS_FAIL) && (chip->errstat)) + status = chip->errstat(mtd, chip, FL_WRITING, status, page); + + if (status & NAND_STATUS_FAIL) { + ret = -EIO; + goto err; + } + +#ifdef CONFIG_MTD_NAND_VERIFY_WRITE + /* Send command to read back the data */ + chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); + + if (chip->verify_buf(mtd, buf, mtd->writesize)) { + ret = -EIO; + goto err; + } + + /* Make sure the next page prog is preceded by a status read */ + chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); +#endif +err: + /* restore ECC layout */ + if (page < CONFIG_KEYSTONE_NAND_MAX_RBL_PAGE) { + chip->ecc.layout = saved_ecc_layout; + mtd->oobavail = saved_ecc_layout->oobavail; + } + + return ret; +} + +/** + * nand_davinci_read_page_hwecc - hardware ECC based page read function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data + * @oob_required: caller requires OOB data read to chip->oob_poi + * @page: page number to read + * + * Not for syndrome calculating ECC controllers which need a special oob layout. + */ +static int nand_davinci_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf, int oob_required, int page) +{ + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + uint32_t *eccpos; + uint8_t *p = buf; + uint8_t *ecc_code = chip->buffers->ecccode; + uint8_t *ecc_calc = chip->buffers->ecccalc; + struct nand_ecclayout *saved_ecc_layout = chip->ecc.layout; + + /* save current ECC layout and assign Keystone RBL ECC layout */ + if (page < CONFIG_KEYSTONE_NAND_MAX_RBL_PAGE) { + chip->ecc.layout = &nand_keystone_rbl_4bit_layout_oobfirst; + mtd->oobavail = chip->ecc.layout->oobavail; + } + + eccpos = chip->ecc.layout->eccpos; + + /* Read the OOB area first */ + chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); + chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); + chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); + + for (i = 0; i < chip->ecc.total; i++) + ecc_code[i] = chip->oob_poi[eccpos[i]]; + + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { + int stat; + + chip->ecc.hwctl(mtd, NAND_ECC_READ); + chip->read_buf(mtd, p, eccsize); + chip->ecc.calculate(mtd, p, &ecc_calc[i]); + + stat = chip->ecc.correct(mtd, p, &ecc_code[i], NULL); + if (stat < 0) + mtd->ecc_stats.failed++; + else + mtd->ecc_stats.corrected += stat; + } + + /* restore ECC layout */ + if (page < CONFIG_KEYSTONE_NAND_MAX_RBL_PAGE) { + chip->ecc.layout = saved_ecc_layout; + mtd->oobavail = saved_ecc_layout->oobavail; + } + + return 0; +} +#endif /* CONFIG_KEYSTONE_RBL_NAND */ + static void nand_davinci_4bit_enable_hwecc(struct mtd_info *mtd, int mode) { u32 val; @@ -604,6 +787,19 @@ static void nand_flash_init(void) void davinci_nand_init(struct nand_chip *nand) { +#if defined CONFIG_KEYSTONE_RBL_NAND + int i; + struct nand_ecclayout *layout; + + layout = &nand_keystone_rbl_4bit_layout_oobfirst; + layout->oobavail = 0; + for (i = 0; layout->oobfree[i].length && + i < ARRAY_SIZE(layout->oobfree); i++) + layout->oobavail += layout->oobfree[i].length; + + nand->write_page = nand_davinci_write_page; + nand->ecc.read_page = nand_davinci_read_page_hwecc; +#endif nand->chip_delay = 0; #ifdef CONFIG_SYS_NAND_USE_FLASH_BBT nand->bbt_options |= NAND_BBT_USE_FLASH; |