diff options
author | Josh Wu <josh.wu@atmel.com> | 2013-01-23 12:47:11 (GMT) |
---|---|---|
committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2013-02-12 15:00:54 (GMT) |
commit | e66b4318f8fc0e12421de6287c557cdd92789010 (patch) | |
tree | 40aa90c935f9e0b86f645f0a38a5fff1facc1b9b | |
parent | c0cf787f10c6ffb050e85c8ac9c0a8161cb06cb9 (diff) | |
download | linux-e66b4318f8fc0e12421de6287c557cdd92789010.tar.xz |
mtd: atmel_nand: make pmecc-cap, pmecc-sector-size in dts is optional.
If those two are not specified in dts file, driver will report an error.
TODO: in this case, driver will find ecc requirement in NAND ONFI parameters.
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
-rw-r--r-- | drivers/mtd/nand/atmel_nand.c | 52 |
1 files changed, 31 insertions, 21 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index 1d989db..f186a37 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -101,6 +101,8 @@ struct atmel_nand_host { u8 pmecc_corr_cap; u16 pmecc_sector_size; u32 pmecc_lookup_table_offset; + u32 pmecc_lookup_table_offset_512; + u32 pmecc_lookup_table_offset_1024; int pmecc_bytes_per_sector; int pmecc_sector_number; @@ -916,8 +918,16 @@ static int __init atmel_pmecc_nand_init_params(struct platform_device *pdev, struct resource *regs, *regs_pmerr, *regs_rom; int cap, sector_size, err_no; + if (host->pmecc_corr_cap == 0 || host->pmecc_sector_size == 0) + /* TODO: Should use ONFI ecc parameters. */ + return -EINVAL; + cap = host->pmecc_corr_cap; sector_size = host->pmecc_sector_size; + host->pmecc_lookup_table_offset = (sector_size == 512) ? + host->pmecc_lookup_table_offset_512 : + host->pmecc_lookup_table_offset_1024; + dev_info(host->dev, "Initialize PMECC params, cap: %d, sector: %d\n", cap, sector_size); @@ -1259,29 +1269,29 @@ static int atmel_of_init_port(struct atmel_nand_host *host, /* use PMECC, get correction capability, sector size and lookup * table offset. + * If correction bits and sector size are not specified, then find + * them from NAND ONFI parameters. */ - if (of_property_read_u32(np, "atmel,pmecc-cap", &val) != 0) { - dev_err(host->dev, "Cannot decide PMECC Capability\n"); - return -EINVAL; - } else if ((val != 2) && (val != 4) && (val != 8) && (val != 12) && - (val != 24)) { - dev_err(host->dev, - "Unsupported PMECC correction capability: %d; should be 2, 4, 8, 12 or 24\n", - val); - return -EINVAL; + if (of_property_read_u32(np, "atmel,pmecc-cap", &val) == 0) { + if ((val != 2) && (val != 4) && (val != 8) && (val != 12) && + (val != 24)) { + dev_err(host->dev, + "Unsupported PMECC correction capability: %d; should be 2, 4, 8, 12 or 24\n", + val); + return -EINVAL; + } + host->pmecc_corr_cap = (u8)val; } - host->pmecc_corr_cap = (u8)val; - if (of_property_read_u32(np, "atmel,pmecc-sector-size", &val) != 0) { - dev_err(host->dev, "Cannot decide PMECC Sector Size\n"); - return -EINVAL; - } else if ((val != 512) && (val != 1024)) { - dev_err(host->dev, - "Unsupported PMECC sector size: %d; should be 512 or 1024 bytes\n", - val); - return -EINVAL; + if (of_property_read_u32(np, "atmel,pmecc-sector-size", &val) == 0) { + if ((val != 512) && (val != 1024)) { + dev_err(host->dev, + "Unsupported PMECC sector size: %d; should be 512 or 1024 bytes\n", + val); + return -EINVAL; + } + host->pmecc_sector_size = (u16)val; } - host->pmecc_sector_size = (u16)val; if (of_property_read_u32_array(np, "atmel,pmecc-lookup-table-offset", offset, 2) != 0) { @@ -1292,8 +1302,8 @@ static int atmel_of_init_port(struct atmel_nand_host *host, dev_err(host->dev, "Invalid PMECC lookup table offset\n"); return -EINVAL; } - host->pmecc_lookup_table_offset = - (host->pmecc_sector_size == 512) ? offset[0] : offset[1]; + host->pmecc_lookup_table_offset_512 = offset[0]; + host->pmecc_lookup_table_offset_1024 = offset[1]; return 0; } |