diff options
Diffstat (limited to 'drivers/mtd/nand/raw/socrates_nand.c')
| -rw-r--r-- | drivers/mtd/nand/raw/socrates_nand.c | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/drivers/mtd/nand/raw/socrates_nand.c b/drivers/mtd/nand/raw/socrates_nand.c index 243b34cfbc1b..668584683ce5 100644 --- a/drivers/mtd/nand/raw/socrates_nand.c +++ b/drivers/mtd/nand/raw/socrates_nand.c @@ -8,8 +8,9 @@ #include <linux/mtd/mtd.h> #include <linux/mtd/rawnand.h> #include <linux/mtd/partitions.h> +#include <linux/of.h> #include <linux/of_address.h> -#include <linux/of_platform.h> +#include <linux/platform_device.h> #include <linux/io.h> #define FPGA_NAND_CMD_MASK (0x7 << 28) @@ -22,6 +23,7 @@ #define FPGA_NAND_DATA_SHIFT 16 struct socrates_nand_host { + struct nand_controller controller; struct nand_chip nand_chip; void __iomem *io_base; struct device *dev; @@ -116,6 +118,19 @@ static int socrates_nand_device_ready(struct nand_chip *nand_chip) return 1; } +static int socrates_attach_chip(struct nand_chip *chip) +{ + if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_SOFT && + chip->ecc.algo == NAND_ECC_ALGO_UNKNOWN) + chip->ecc.algo = NAND_ECC_ALGO_HAMMING; + + return 0; +} + +static const struct nand_controller_ops socrates_ops = { + .attach_chip = socrates_attach_chip, +}; + /* * Probe for the NAND device. */ @@ -141,6 +156,10 @@ static int socrates_nand_probe(struct platform_device *ofdev) mtd = nand_to_mtd(nand_chip); host->dev = &ofdev->dev; + nand_controller_init(&host->controller); + host->controller.ops = &socrates_ops; + nand_chip->controller = &host->controller; + /* link the private data structures */ nand_set_controller_data(nand_chip, host); nand_set_flash_node(nand_chip, ofdev->dev.of_node); @@ -153,12 +172,16 @@ static int socrates_nand_probe(struct platform_device *ofdev) nand_chip->legacy.read_buf = socrates_nand_read_buf; nand_chip->legacy.dev_ready = socrates_nand_device_ready; - nand_chip->ecc.mode = NAND_ECC_SOFT; /* enable ECC */ - nand_chip->ecc.algo = NAND_ECC_HAMMING; - /* TODO: I have no idea what real delay is. */ nand_chip->legacy.chip_delay = 20; /* 20us command delay time */ + /* + * This driver assumes that the default ECC engine should be TYPE_SOFT. + * Set ->engine_type before registering the NAND devices in order to + * provide a driver specific default value. + */ + nand_chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_SOFT; + dev_set_drvdata(&ofdev->dev, host); res = nand_scan(nand_chip, 1); @@ -179,7 +202,7 @@ out: /* * Remove a NAND device. */ -static int socrates_nand_remove(struct platform_device *ofdev) +static void socrates_nand_remove(struct platform_device *ofdev) { struct socrates_nand_host *host = dev_get_drvdata(&ofdev->dev); struct nand_chip *chip = &host->nand_chip; @@ -190,8 +213,6 @@ static int socrates_nand_remove(struct platform_device *ofdev) nand_cleanup(chip); iounmap(host->io_base); - - return 0; } static const struct of_device_id socrates_nand_match[] = |