diff options
Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 305 |
1 files changed, 166 insertions, 139 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index d340b2f..bd39f7b 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2912,12 +2912,13 @@ static int nand_flash_detect_ext_param_page(struct mtd_info *mtd, /* get the info we want. */ ecc = (struct onfi_ext_ecc_info *)cursor; - if (ecc->codeword_size) { - chip->ecc_strength_ds = ecc->ecc_bits; - chip->ecc_step_ds = 1 << ecc->codeword_size; + if (!ecc->codeword_size) { + pr_debug("Invalid codeword size\n"); + goto ext_out; } - pr_info("ONFI extended param page detected.\n"); + chip->ecc_strength_ds = ecc->ecc_bits; + chip->ecc_step_ds = 1 << ecc->codeword_size; ret = 0; ext_out: @@ -2935,29 +2936,34 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, int i; int val; - /* ONFI need to be probed in 8 bits mode, and 16 bits should be selected with NAND_BUSWIDTH_AUTO */ - if (chip->options & NAND_BUSWIDTH_16) { - pr_err("Trying ONFI probe in 16 bits mode, aborting !\n"); - return 0; - } /* Try ONFI for unknown chip or LP */ chip->cmdfunc(mtd, NAND_CMD_READID, 0x20, -1); if (chip->read_byte(mtd) != 'O' || chip->read_byte(mtd) != 'N' || chip->read_byte(mtd) != 'F' || chip->read_byte(mtd) != 'I') return 0; + /* + * ONFI must be probed in 8-bit mode or with NAND_BUSWIDTH_AUTO, not + * with NAND_BUSWIDTH_16 + */ + if (chip->options & NAND_BUSWIDTH_16) { + pr_err("ONFI cannot be probed in 16-bit mode; aborting\n"); + return 0; + } + chip->cmdfunc(mtd, NAND_CMD_PARAM, 0, -1); for (i = 0; i < 3; i++) { chip->read_buf(mtd, (uint8_t *)p, sizeof(*p)); if (onfi_crc16(ONFI_CRC_BASE, (uint8_t *)p, 254) == le16_to_cpu(p->crc)) { - pr_info("ONFI param page %d valid\n", i); break; } } - if (i == 3) + if (i == 3) { + pr_err("Could not find valid ONFI parameter page; aborting\n"); return 0; + } /* Check version */ val = le16_to_cpu(p->revision); @@ -2981,11 +2987,23 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, sanitize_string(p->model, sizeof(p->model)); if (!mtd->name) mtd->name = p->model; + mtd->writesize = le32_to_cpu(p->byte_per_page); - mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize; + + /* + * pages_per_block and blocks_per_lun may not be a power-of-2 size + * (don't ask me who thought of this...). MTD assumes that these + * dimensions will be power-of-2, so just truncate the remaining area. + */ + mtd->erasesize = 1 << (fls(le32_to_cpu(p->pages_per_block)) - 1); + mtd->erasesize *= mtd->writesize; + mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page); - chip->chipsize = le32_to_cpu(p->blocks_per_lun); + + /* See erasesize comment */ + chip->chipsize = 1 << (fls(le32_to_cpu(p->blocks_per_lun)) - 1); chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count; + chip->bits_per_cell = p->bits_per_cell; if (onfi_feature(chip) & ONFI_FEATURE_16_BIT_BUS) *busw = NAND_BUSWIDTH_16; @@ -3009,10 +3027,11 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, /* The Extended Parameter Page is supported since ONFI 2.1. */ if (nand_flash_detect_ext_param_page(mtd, chip, p)) - pr_info("Failed to detect the extended param page.\n"); + pr_warn("Failed to detect ONFI extended param page\n"); + } else { + pr_warn("Could not retrieve ONFI ECC requirements\n"); } - pr_info("ONFI flash detected\n"); return 1; } @@ -3075,6 +3094,16 @@ static int nand_id_len(u8 *id_data, int arrlen) return arrlen; } +/* Extract the bits of per cell from the 3rd byte of the extended ID */ +static int nand_get_bits_per_cell(u8 cellinfo) +{ + int bits; + + bits = cellinfo & NAND_CI_CELLTYPE_MSK; + bits >>= NAND_CI_CELLTYPE_SHIFT; + return bits + 1; +} + /* * Many new NAND share similar device ID codes, which represent the size of the * chip. The rest of the parameters must be decoded according to generic or @@ -3085,7 +3114,7 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip, { int extid, id_len; /* The 3rd id byte holds MLC / multichip data */ - chip->cellinfo = id_data[2]; + chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]); /* The 4th id byte is the important one */ extid = id_data[3]; @@ -3101,8 +3130,7 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip, * ID to decide what to do. */ if (id_len == 6 && id_data[0] == NAND_MFR_SAMSUNG && - (chip->cellinfo & NAND_CI_CELLTYPE_MSK) && - id_data[5] != 0x00) { + !nand_is_slc(chip) && id_data[5] != 0x00) { /* Calc pagesize */ mtd->writesize = 2048 << (extid & 0x03); extid >>= 2; @@ -3134,7 +3162,7 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip, (((extid >> 1) & 0x04) | (extid & 0x03)); *busw = 0; } else if (id_len == 6 && id_data[0] == NAND_MFR_HYNIX && - (chip->cellinfo & NAND_CI_CELLTYPE_MSK)) { + !nand_is_slc(chip)) { unsigned int tmp; /* Calc pagesize */ @@ -3197,7 +3225,7 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip, * - ID byte 5, bit[7]: 1 -> BENAND, 0 -> raw SLC */ if (id_len >= 6 && id_data[0] == NAND_MFR_TOSHIBA && - !(chip->cellinfo & NAND_CI_CELLTYPE_MSK) && + nand_is_slc(chip) && (id_data[5] & 0x7) == 0x6 /* 24nm */ && !(id_data[4] & 0x80) /* !BENAND */) { mtd->oobsize = 32 * mtd->writesize >> 9; @@ -3222,6 +3250,9 @@ static void nand_decode_id(struct mtd_info *mtd, struct nand_chip *chip, mtd->oobsize = mtd->writesize / 32; *busw = type->options & NAND_BUSWIDTH_16; + /* All legacy ID NAND are small-page, SLC */ + chip->bits_per_cell = 1; + /* * Check for Spansion/AMD ID + repeating 5th, 6th byte since * some Spansion chips have erasesize that conflicts with size @@ -3258,11 +3289,11 @@ static void nand_decode_bbm_options(struct mtd_info *mtd, * Micron devices with 2KiB pages and on SLC Samsung, Hynix, Toshiba, * AMD/Spansion, and Macronix. All others scan only the first page. */ - if ((chip->cellinfo & NAND_CI_CELLTYPE_MSK) && + if (!nand_is_slc(chip) && (maf_id == NAND_MFR_SAMSUNG || maf_id == NAND_MFR_HYNIX)) chip->bbt_options |= NAND_BBT_SCANLASTPAGE; - else if ((!(chip->cellinfo & NAND_CI_CELLTYPE_MSK) && + else if ((nand_is_slc(chip) && (maf_id == NAND_MFR_SAMSUNG || maf_id == NAND_MFR_HYNIX || maf_id == NAND_MFR_TOSHIBA || @@ -3286,7 +3317,7 @@ static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip, mtd->erasesize = type->erasesize; mtd->oobsize = type->oobsize; - chip->cellinfo = id_data[2]; + chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]); chip->chipsize = (uint64_t)type->chipsize << 20; chip->options |= type->options; chip->ecc_strength_ds = NAND_ECC_STRENGTH(type); @@ -3441,11 +3472,13 @@ ident_done: if (mtd->writesize > 512 && chip->cmdfunc == nand_command) chip->cmdfunc = nand_command_lp; - pr_info("NAND device: Manufacturer ID: 0x%02x, Chip ID: 0x%02x (%s %s)," - " %dMiB, page size: %d, OOB size: %d\n", + pr_info("NAND device: Manufacturer ID: 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, *dev_id, nand_manuf_ids[maf_idx].name, - chip->onfi_version ? chip->onfi_params.model : type->name, - (int)(chip->chipsize >> 20), mtd->writesize, mtd->oobsize); + chip->onfi_version ? chip->onfi_params.model : type->name); + + pr_info("NAND device: %dMiB, %s, page size: %d, OOB size: %d\n", + (int)(chip->chipsize >> 20), nand_is_slc(chip) ? "SLC" : "MLC", + mtd->writesize, mtd->oobsize); return type; } @@ -3525,6 +3558,7 @@ int nand_scan_tail(struct mtd_info *mtd) { int i; struct nand_chip *chip = mtd->priv; + struct nand_ecc_ctrl *ecc = &chip->ecc; /* New bad blocks should be marked in OOB, flash-based BBT, or both */ BUG_ON((chip->bbt_options & NAND_BBT_NO_OOB_BBM) && @@ -3541,19 +3575,19 @@ int nand_scan_tail(struct mtd_info *mtd) /* * If no default placement scheme is given, select an appropriate one. */ - if (!chip->ecc.layout && (chip->ecc.mode != NAND_ECC_SOFT_BCH)) { + if (!ecc->layout && (ecc->mode != NAND_ECC_SOFT_BCH)) { switch (mtd->oobsize) { case 8: - chip->ecc.layout = &nand_oob_8; + ecc->layout = &nand_oob_8; break; case 16: - chip->ecc.layout = &nand_oob_16; + ecc->layout = &nand_oob_16; break; case 64: - chip->ecc.layout = &nand_oob_64; + ecc->layout = &nand_oob_64; break; case 128: - chip->ecc.layout = &nand_oob_128; + ecc->layout = &nand_oob_128; break; default: pr_warn("No oob scheme defined for oobsize %d\n", @@ -3570,64 +3604,62 @@ int nand_scan_tail(struct mtd_info *mtd) * selected and we have 256 byte pagesize fallback to software ECC */ - switch (chip->ecc.mode) { + switch (ecc->mode) { case NAND_ECC_HW_OOB_FIRST: /* Similar to NAND_ECC_HW, but a separate read_page handle */ - if (!chip->ecc.calculate || !chip->ecc.correct || - !chip->ecc.hwctl) { + if (!ecc->calculate || !ecc->correct || !ecc->hwctl) { pr_warn("No ECC functions supplied; " "hardware ECC not possible\n"); BUG(); } - if (!chip->ecc.read_page) - chip->ecc.read_page = nand_read_page_hwecc_oob_first; + if (!ecc->read_page) + ecc->read_page = nand_read_page_hwecc_oob_first; case NAND_ECC_HW: /* Use standard hwecc read page function? */ - if (!chip->ecc.read_page) - chip->ecc.read_page = nand_read_page_hwecc; - if (!chip->ecc.write_page) - chip->ecc.write_page = nand_write_page_hwecc; - if (!chip->ecc.read_page_raw) - chip->ecc.read_page_raw = nand_read_page_raw; - if (!chip->ecc.write_page_raw) - chip->ecc.write_page_raw = nand_write_page_raw; - if (!chip->ecc.read_oob) - chip->ecc.read_oob = nand_read_oob_std; - if (!chip->ecc.write_oob) - chip->ecc.write_oob = nand_write_oob_std; - if (!chip->ecc.read_subpage) - chip->ecc.read_subpage = nand_read_subpage; - if (!chip->ecc.write_subpage) - chip->ecc.write_subpage = nand_write_subpage_hwecc; + if (!ecc->read_page) + ecc->read_page = nand_read_page_hwecc; + if (!ecc->write_page) + ecc->write_page = nand_write_page_hwecc; + if (!ecc->read_page_raw) + ecc->read_page_raw = nand_read_page_raw; + if (!ecc->write_page_raw) + ecc->write_page_raw = nand_write_page_raw; + if (!ecc->read_oob) + ecc->read_oob = nand_read_oob_std; + if (!ecc->write_oob) + ecc->write_oob = nand_write_oob_std; + if (!ecc->read_subpage) + ecc->read_subpage = nand_read_subpage; + if (!ecc->write_subpage) + ecc->write_subpage = nand_write_subpage_hwecc; case NAND_ECC_HW_SYNDROME: - if ((!chip->ecc.calculate || !chip->ecc.correct || - !chip->ecc.hwctl) && - (!chip->ecc.read_page || - chip->ecc.read_page == nand_read_page_hwecc || - !chip->ecc.write_page || - chip->ecc.write_page == nand_write_page_hwecc)) { + if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) && + (!ecc->read_page || + ecc->read_page == nand_read_page_hwecc || + !ecc->write_page || + ecc->write_page == nand_write_page_hwecc)) { pr_warn("No ECC functions supplied; " "hardware ECC not possible\n"); BUG(); } /* Use standard syndrome read/write page function? */ - if (!chip->ecc.read_page) - chip->ecc.read_page = nand_read_page_syndrome; - if (!chip->ecc.write_page) - chip->ecc.write_page = nand_write_page_syndrome; - if (!chip->ecc.read_page_raw) - chip->ecc.read_page_raw = nand_read_page_raw_syndrome; - if (!chip->ecc.write_page_raw) - chip->ecc.write_page_raw = nand_write_page_raw_syndrome; - if (!chip->ecc.read_oob) - chip->ecc.read_oob = nand_read_oob_syndrome; - if (!chip->ecc.write_oob) - chip->ecc.write_oob = nand_write_oob_syndrome; - - if (mtd->writesize >= chip->ecc.size) { - if (!chip->ecc.strength) { + if (!ecc->read_page) + ecc->read_page = nand_read_page_syndrome; + if (!ecc->write_page) + ecc->write_page = nand_write_page_syndrome; + if (!ecc->read_page_raw) + ecc->read_page_raw = nand_read_page_raw_syndrome; + if (!ecc->write_page_raw) + ecc->write_page_raw = nand_write_page_raw_syndrome; + if (!ecc->read_oob) + ecc->read_oob = nand_read_oob_syndrome; + if (!ecc->write_oob) + ecc->write_oob = nand_write_oob_syndrome; + + if (mtd->writesize >= ecc->size) { + if (!ecc->strength) { pr_warn("Driver must set ecc.strength when using hardware ECC\n"); BUG(); } @@ -3635,23 +3667,23 @@ int nand_scan_tail(struct mtd_info *mtd) } pr_warn("%d byte HW ECC not possible on " "%d byte page size, fallback to SW ECC\n", - chip->ecc.size, mtd->writesize); - chip->ecc.mode = NAND_ECC_SOFT; + ecc->size, mtd->writesize); + ecc->mode = NAND_ECC_SOFT; case NAND_ECC_SOFT: - chip->ecc.calculate = nand_calculate_ecc; - chip->ecc.correct = nand_correct_data; - chip->ecc.read_page = nand_read_page_swecc; - chip->ecc.read_subpage = nand_read_subpage; - chip->ecc.write_page = nand_write_page_swecc; - chip->ecc.read_page_raw = nand_read_page_raw; - chip->ecc.write_page_raw = nand_write_page_raw; - chip->ecc.read_oob = nand_read_oob_std; - chip->ecc.write_oob = nand_write_oob_std; - if (!chip->ecc.size) - chip->ecc.size = 256; - chip->ecc.bytes = 3; - chip->ecc.strength = 1; + ecc->calculate = nand_calculate_ecc; + ecc->correct = nand_correct_data; + ecc->read_page = nand_read_page_swecc; + ecc->read_subpage = nand_read_subpage; + ecc->write_page = nand_write_page_swecc; + ecc->read_page_raw = nand_read_page_raw; + ecc->write_page_raw = nand_write_page_raw; + ecc->read_oob = nand_read_oob_std; + ecc->write_oob = nand_write_oob_std; + if (!ecc->size) + ecc->size = 256; + ecc->bytes = 3; + ecc->strength = 1; break; case NAND_ECC_SOFT_BCH: @@ -3659,88 +3691,83 @@ int nand_scan_tail(struct mtd_info *mtd) pr_warn("CONFIG_MTD_ECC_BCH not enabled\n"); BUG(); } - chip->ecc.calculate = nand_bch_calculate_ecc; - chip->ecc.correct = nand_bch_correct_data; - chip->ecc.read_page = nand_read_page_swecc; - chip->ecc.read_subpage = nand_read_subpage; - chip->ecc.write_page = nand_write_page_swecc; - chip->ecc.read_page_raw = nand_read_page_raw; - chip->ecc.write_page_raw = nand_write_page_raw; - chip->ecc.read_oob = nand_read_oob_std; - chip->ecc.write_oob = nand_write_oob_std; + ecc->calculate = nand_bch_calculate_ecc; + ecc->correct = nand_bch_correct_data; + ecc->read_page = nand_read_page_swecc; + ecc->read_subpage = nand_read_subpage; + ecc->write_page = nand_write_page_swecc; + ecc->read_page_raw = nand_read_page_raw; + ecc->write_page_raw = nand_write_page_raw; + ecc->read_oob = nand_read_oob_std; + ecc->write_oob = nand_write_oob_std; /* * Board driver should supply ecc.size and ecc.bytes values to * select how many bits are correctable; see nand_bch_init() * for details. Otherwise, default to 4 bits for large page * devices. */ - if (!chip->ecc.size && (mtd->oobsize >= 64)) { - chip->ecc.size = 512; - chip->ecc.bytes = 7; + if (!ecc->size && (mtd->oobsize >= 64)) { + ecc->size = 512; + ecc->bytes = 7; } - chip->ecc.priv = nand_bch_init(mtd, - chip->ecc.size, - chip->ecc.bytes, - &chip->ecc.layout); - if (!chip->ecc.priv) { + ecc->priv = nand_bch_init(mtd, ecc->size, ecc->bytes, + &ecc->layout); + if (!ecc->priv) { pr_warn("BCH ECC initialization failed!\n"); BUG(); } - chip->ecc.strength = - chip->ecc.bytes * 8 / fls(8 * chip->ecc.size); + ecc->strength = ecc->bytes * 8 / fls(8 * ecc->size); break; case NAND_ECC_NONE: pr_warn("NAND_ECC_NONE selected by board driver. " "This is not recommended!\n"); - chip->ecc.read_page = nand_read_page_raw; - chip->ecc.write_page = nand_write_page_raw; - chip->ecc.read_oob = nand_read_oob_std; - chip->ecc.read_page_raw = nand_read_page_raw; - chip->ecc.write_page_raw = nand_write_page_raw; - chip->ecc.write_oob = nand_write_oob_std; - chip->ecc.size = mtd->writesize; - chip->ecc.bytes = 0; - chip->ecc.strength = 0; + ecc->read_page = nand_read_page_raw; + ecc->write_page = nand_write_page_raw; + ecc->read_oob = nand_read_oob_std; + ecc->read_page_raw = nand_read_page_raw; + ecc->write_page_raw = nand_write_page_raw; + ecc->write_oob = nand_write_oob_std; + ecc->size = mtd->writesize; + ecc->bytes = 0; + ecc->strength = 0; break; default: - pr_warn("Invalid NAND_ECC_MODE %d\n", chip->ecc.mode); + pr_warn("Invalid NAND_ECC_MODE %d\n", ecc->mode); BUG(); } /* For many systems, the standard OOB write also works for raw */ - if (!chip->ecc.read_oob_raw) - chip->ecc.read_oob_raw = chip->ecc.read_oob; - if (!chip->ecc.write_oob_raw) - chip->ecc.write_oob_raw = chip->ecc.write_oob; + if (!ecc->read_oob_raw) + ecc->read_oob_raw = ecc->read_oob; + if (!ecc->write_oob_raw) + ecc->write_oob_raw = ecc->write_oob; /* * The number of bytes available for a client to place data into * the out of band area. */ - chip->ecc.layout->oobavail = 0; - for (i = 0; chip->ecc.layout->oobfree[i].length - && i < ARRAY_SIZE(chip->ecc.layout->oobfree); i++) - chip->ecc.layout->oobavail += - chip->ecc.layout->oobfree[i].length; - mtd->oobavail = chip->ecc.layout->oobavail; + ecc->layout->oobavail = 0; + for (i = 0; ecc->layout->oobfree[i].length + && i < ARRAY_SIZE(ecc->layout->oobfree); i++) + ecc->layout->oobavail += ecc->layout->oobfree[i].length; + mtd->oobavail = ecc->layout->oobavail; /* * Set the number of read / write steps for one page depending on ECC * mode. */ - chip->ecc.steps = mtd->writesize / chip->ecc.size; - if (chip->ecc.steps * chip->ecc.size != mtd->writesize) { + ecc->steps = mtd->writesize / ecc->size; + if (ecc->steps * ecc->size != mtd->writesize) { pr_warn("Invalid ECC parameters\n"); BUG(); } - chip->ecc.total = chip->ecc.steps * chip->ecc.bytes; + ecc->total = ecc->steps * ecc->bytes; /* Allow subpage writes up to ecc.steps. Not possible for MLC flash */ - if (!(chip->options & NAND_NO_SUBPAGE_WRITE) && - !(chip->cellinfo & NAND_CI_CELLTYPE_MSK)) { - switch (chip->ecc.steps) { + if (!(chip->options & NAND_NO_SUBPAGE_WRITE) && nand_is_slc(chip)) { + switch (ecc->steps) { case 2: mtd->subpage_sft = 1; break; @@ -3760,11 +3787,11 @@ int nand_scan_tail(struct mtd_info *mtd) chip->pagebuf = -1; /* Large page NAND with SOFT_ECC should support subpage reads */ - if ((chip->ecc.mode == NAND_ECC_SOFT) && (chip->page_shift > 9)) + if ((ecc->mode == NAND_ECC_SOFT) && (chip->page_shift > 9)) chip->options |= NAND_SUBPAGE_READ; /* Fill in remaining MTD driver data */ - mtd->type = MTD_NANDFLASH; + mtd->type = nand_is_slc(chip) ? MTD_NANDFLASH : MTD_MLCNANDFLASH; mtd->flags = (chip->options & NAND_ROM) ? MTD_CAP_ROM : MTD_CAP_NANDFLASH; mtd->_erase = nand_erase; @@ -3785,9 +3812,9 @@ int nand_scan_tail(struct mtd_info *mtd) mtd->writebufsize = mtd->writesize; /* propagate ecc info to mtd_info */ - mtd->ecclayout = chip->ecc.layout; - mtd->ecc_strength = chip->ecc.strength; - mtd->ecc_step_size = chip->ecc.size; + mtd->ecclayout = ecc->layout; + mtd->ecc_strength = ecc->strength; + mtd->ecc_step_size = ecc->size; /* * Initialize bitflip_threshold to its default prior scan_bbt() call. * scan_bbt() might invoke mtd_read(), thus bitflip_threshold must be |
