On Fri, 20 Jul 2018 17:14:59 +0200 Miquel Raynal <[email protected]> wrote:
> Two helpers have been added to the core to make ECC-related > configuration between the detection phase and the final NAND scan. Use > these hooks and convert the driver to just use nand_scan() instead of > both nand_scan_ident() and nand_scan_tail(). > > Signed-off-by: Miquel Raynal <[email protected]> Reviewed-by: Boris Brezillon <[email protected]> > --- > drivers/mtd/nand/raw/fsmc_nand.c | 148 > +++++++++++++++++++++------------------ > 1 file changed, 78 insertions(+), 70 deletions(-) > > diff --git a/drivers/mtd/nand/raw/fsmc_nand.c > b/drivers/mtd/nand/raw/fsmc_nand.c > index 59524d181bfe..f418236fa020 100644 > --- a/drivers/mtd/nand/raw/fsmc_nand.c > +++ b/drivers/mtd/nand/raw/fsmc_nand.c > @@ -919,6 +919,82 @@ static int fsmc_nand_probe_config_dt(struct > platform_device *pdev, > return 0; > } > > +static int fsmc_nand_attach_chip(struct nand_chip *nand) > +{ > + struct mtd_info *mtd = nand_to_mtd(nand); > + struct fsmc_nand_data *host = mtd_to_fsmc(mtd); > + > + if (AMBA_REV_BITS(host->pid) >= 8) { > + switch (mtd->oobsize) { > + case 16: > + case 64: > + case 128: > + case 224: > + case 256: > + break; > + default: > + dev_warn(host->dev, > + "No oob scheme defined for oobsize %d\n", > + mtd->oobsize); > + return -EINVAL; > + } > + > + mtd_set_ooblayout(mtd, &fsmc_ecc4_ooblayout_ops); > + > + return 0; > + } > + > + switch (nand->ecc.mode) { > + case NAND_ECC_HW: > + dev_info(host->dev, "Using 1-bit HW ECC scheme\n"); > + nand->ecc.calculate = fsmc_read_hwecc_ecc1; > + nand->ecc.correct = nand_correct_data; > + nand->ecc.bytes = 3; > + nand->ecc.strength = 1; > + break; > + > + case NAND_ECC_SOFT: > + if (nand->ecc.algo == NAND_ECC_BCH) { > + dev_info(host->dev, > + "Using 4-bit SW BCH ECC scheme\n"); > + break; > + } > + > + case NAND_ECC_ON_DIE: > + break; > + > + default: > + dev_err(host->dev, "Unsupported ECC mode!\n"); > + return -ENOTSUPP; > + } > + > + /* > + * Don't set layout for BCH4 SW ECC. This will be > + * generated later in nand_bch_init() later. > + */ > + if (nand->ecc.mode == NAND_ECC_HW) { > + switch (mtd->oobsize) { > + case 16: > + case 64: > + case 128: > + mtd_set_ooblayout(mtd, > + &fsmc_ecc1_ooblayout_ops); > + break; > + default: > + dev_warn(host->dev, > + "No oob scheme defined for oobsize %d\n", > + mtd->oobsize); > + return -EINVAL; > + } > + } > + > + return 0; > +} > + > +static const struct nand_controller_ops fsmc_nand_controller_ops = { > + .attach_chip = fsmc_nand_attach_chip, > +}; > + > /* > * fsmc_nand_probe - Probe function > * @pdev: platform device structure > @@ -1048,76 +1124,8 @@ static int __init fsmc_nand_probe(struct > platform_device *pdev) > /* > * Scan to find existence of the device > */ > - ret = nand_scan_ident(mtd, 1, NULL); > - if (ret) { > - dev_err(&pdev->dev, "No NAND Device found!\n"); > - goto release_dma_write_chan; > - } > - > - if (AMBA_REV_BITS(host->pid) >= 8) { > - switch (mtd->oobsize) { > - case 16: > - case 64: > - case 128: > - case 224: > - case 256: > - break; > - default: > - dev_warn(&pdev->dev, "No oob scheme defined for oobsize > %d\n", > - mtd->oobsize); > - ret = -EINVAL; > - goto release_dma_write_chan; > - } > - > - mtd_set_ooblayout(mtd, &fsmc_ecc4_ooblayout_ops); > - } else { > - switch (nand->ecc.mode) { > - case NAND_ECC_HW: > - dev_info(&pdev->dev, "Using 1-bit HW ECC scheme\n"); > - nand->ecc.calculate = fsmc_read_hwecc_ecc1; > - nand->ecc.correct = nand_correct_data; > - nand->ecc.bytes = 3; > - nand->ecc.strength = 1; > - break; > - > - case NAND_ECC_SOFT: > - if (nand->ecc.algo == NAND_ECC_BCH) { > - dev_info(&pdev->dev, "Using 4-bit SW BCH ECC > scheme\n"); > - break; > - } > - > - case NAND_ECC_ON_DIE: > - break; > - > - default: > - dev_err(&pdev->dev, "Unsupported ECC mode!\n"); > - goto release_dma_write_chan; > - } > - > - /* > - * Don't set layout for BCH4 SW ECC. This will be > - * generated later in nand_bch_init() later. > - */ > - if (nand->ecc.mode == NAND_ECC_HW) { > - switch (mtd->oobsize) { > - case 16: > - case 64: > - case 128: > - mtd_set_ooblayout(mtd, > - &fsmc_ecc1_ooblayout_ops); > - break; > - default: > - dev_warn(&pdev->dev, > - "No oob scheme defined for oobsize > %d\n", > - mtd->oobsize); > - ret = -EINVAL; > - goto release_dma_write_chan; > - } > - } > - } > - > - /* Second stage of scan to fill MTD data-structures */ > - ret = nand_scan_tail(mtd); > + nand->dummy_controller.ops = &fsmc_nand_controller_ops; > + ret = nand_scan(mtd, 1); > if (ret) > goto release_dma_write_chan; >
