diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/gpmi-nand/gpmi-lib.c | 6 | ||||
| -rw-r--r-- | drivers/mtd/nand/mtk_ecc.c | 19 | ||||
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 60 |
3 files changed, 55 insertions, 30 deletions
diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c index 0f68a99..141bd70 100644 --- a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c +++ b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c @@ -161,7 +161,7 @@ int gpmi_init(struct gpmi_nand_data *this) ret = gpmi_enable_clk(this); if (ret) - goto err_out; + return ret; ret = gpmi_reset_block(r->gpmi_regs, false); if (ret) goto err_out; @@ -197,6 +197,7 @@ int gpmi_init(struct gpmi_nand_data *this) gpmi_disable_clk(this); return 0; err_out: + gpmi_disable_clk(this); return ret; } @@ -270,7 +271,7 @@ int bch_set_geometry(struct gpmi_nand_data *this) ret = gpmi_enable_clk(this); if (ret) - goto err_out; + return ret; /* * Due to erratum #2847 of the MX23, the BCH cannot be soft reset on this @@ -308,6 +309,7 @@ int bch_set_geometry(struct gpmi_nand_data *this) gpmi_disable_clk(this); return 0; err_out: + gpmi_disable_clk(this); return ret; } diff --git a/drivers/mtd/nand/mtk_ecc.c b/drivers/mtd/nand/mtk_ecc.c index d54f666..dbf2562 100644 --- a/drivers/mtd/nand/mtk_ecc.c +++ b/drivers/mtd/nand/mtk_ecc.c @@ -86,6 +86,8 @@ struct mtk_ecc { struct completion done; struct mutex lock; u32 sectors; + + u8 eccdata[112]; }; static inline void mtk_ecc_wait_idle(struct mtk_ecc *ecc, @@ -366,9 +368,8 @@ int mtk_ecc_encode(struct mtk_ecc *ecc, struct mtk_ecc_config *config, u8 *data, u32 bytes) { dma_addr_t addr; - u8 *p; - u32 len, i, val; - int ret = 0; + u32 len; + int ret; addr = dma_map_single(ecc->dev, data, bytes, DMA_TO_DEVICE); ret = dma_mapping_error(ecc->dev, addr); @@ -393,14 +394,12 @@ int mtk_ecc_encode(struct mtk_ecc *ecc, struct mtk_ecc_config *config, /* Program ECC bytes to OOB: per sector oob = FDM + ECC + SPARE */ len = (config->strength * ECC_PARITY_BITS + 7) >> 3; - p = data + bytes; - /* write the parity bytes generated by the ECC back to the OOB region */ - for (i = 0; i < len; i++) { - if ((i % 4) == 0) - val = readl(ecc->regs + ECC_ENCPAR(i / 4)); - p[i] = (val >> ((i % 4) * 8)) & 0xff; - } + /* write the parity bytes generated by the ECC back to temp buffer */ + __ioread32_copy(ecc->eccdata, ecc->regs + ECC_ENCPAR(0), round_up(len, 4)); + + /* copy into possibly unaligned OOB region with actual length */ + memcpy(data + bytes, ecc->eccdata, len); timeout: dma_unmap_single(ecc->dev, addr, bytes, DMA_TO_DEVICE); diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index e5718e5..3bde96a 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -1095,10 +1095,11 @@ static void nand_release_data_interface(struct nand_chip *chip) /** * nand_reset - Reset and initialize a NAND device * @chip: The NAND chip + * @chipnr: Internal die id * * Returns 0 for success or negative error code otherwise */ -int nand_reset(struct nand_chip *chip) +int nand_reset(struct nand_chip *chip, int chipnr) { struct mtd_info *mtd = nand_to_mtd(chip); int ret; @@ -1107,9 +1108,17 @@ int nand_reset(struct nand_chip *chip) if (ret) return ret; + /* + * The CS line has to be released before we can apply the new NAND + * interface settings, hence this weird ->select_chip() dance. + */ + chip->select_chip(mtd, chipnr); chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); + chip->select_chip(mtd, -1); + chip->select_chip(mtd, chipnr); ret = nand_setup_data_interface(chip); + chip->select_chip(mtd, -1); if (ret) return ret; @@ -1185,8 +1194,6 @@ int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) /* Shift to get chip number */ chipnr = ofs >> chip->chip_shift; - chip->select_chip(mtd, chipnr); - /* * Reset the chip. * If we want to check the WP through READ STATUS and check the bit 7 @@ -1194,7 +1201,9 @@ int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) * some operation can also clear the bit 7 of status register * eg. erase/program a locked block */ - nand_reset(chip); + nand_reset(chip, chipnr); + + chip->select_chip(mtd, chipnr); /* Check, if it is write protected */ if (nand_check_wp(mtd)) { @@ -1244,8 +1253,6 @@ int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) /* Shift to get chip number */ chipnr = ofs >> chip->chip_shift; - chip->select_chip(mtd, chipnr); - /* * Reset the chip. * If we want to check the WP through READ STATUS and check the bit 7 @@ -1253,7 +1260,9 @@ int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) * some operation can also clear the bit 7 of status register * eg. erase/program a locked block */ - nand_reset(chip); + nand_reset(chip, chipnr); + + chip->select_chip(mtd, chipnr); /* Check, if it is write protected */ if (nand_check_wp(mtd)) { @@ -2940,10 +2949,6 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, } chipnr = (int)(to >> chip->chip_shift); - chip->select_chip(mtd, chipnr); - - /* Shift to get page */ - page = (int)(to >> chip->page_shift); /* * Reset the chip. Some chips (like the Toshiba TC5832DC found in one @@ -2951,7 +2956,12 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, * if we don't do this. I have no clue why, but I seem to have 'fixed' * it in the doc2000 driver in August 1999. dwmw2. */ - nand_reset(chip); + nand_reset(chip, chipnr); + + chip->select_chip(mtd, chipnr); + + /* Shift to get page */ + page = (int)(to >> chip->page_shift); /* Check, if it is write protected */ if (nand_check_wp(mtd)) { @@ -3984,14 +3994,14 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, int i, maf_idx; u8 id_data[8]; - /* Select the device */ - chip->select_chip(mtd, 0); - /* * Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx) * after power-up. */ - nand_reset(chip); + nand_reset(chip, 0); + + /* Select the device */ + chip->select_chip(mtd, 0); /* Send the command for reading device ID */ chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); @@ -4329,17 +4339,31 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, return PTR_ERR(type); } + /* Initialize the ->data_interface field. */ ret = nand_init_data_interface(chip); if (ret) return ret; + /* + * Setup the data interface correctly on the chip and controller side. + * This explicit call to nand_setup_data_interface() is only required + * for the first die, because nand_reset() has been called before + * ->data_interface and ->default_onfi_timing_mode were set. + * For the other dies, nand_reset() will automatically switch to the + * best mode for us. + */ + ret = nand_setup_data_interface(chip); + if (ret) + return ret; + chip->select_chip(mtd, -1); /* Check for a chip array */ for (i = 1; i < maxchips; i++) { - chip->select_chip(mtd, i); /* See comment in nand_get_flash_type for reset */ - nand_reset(chip); + nand_reset(chip, i); + + chip->select_chip(mtd, i); /* Send the command for reading device ID */ chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); /* Read manufacturer and device IDs */ |