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Date: Sat, 21 Jul 2018 20:05:06 +0200
From: Boris Brezillon <boris.brezillon@...tlin.com>
To: Miquel Raynal <miquel.raynal@...tlin.com>
Cc: Wenyou Yang <wenyou.yang@...rochip.com>,
Josh Wu <rainyfeeling@...look.com>,
Tudor Ambarus <Tudor.Ambarus@...rochip.com>,
Richard Weinberger <richard@....at>,
David Woodhouse <dwmw2@...radead.org>,
Brian Norris <computersforpeace@...il.com>,
Marek Vasut <marek.vasut@...il.com>,
Nicolas Ferre <nicolas.ferre@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Kamal Dasu <kdasu.kdev@...il.com>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Han Xu <han.xu@....com>,
Harvey Hunt <harveyhuntnexus@...il.com>,
Vladimir Zapolskiy <vz@...ia.com>,
Sylvain Lemieux <slemieux.tyco@...il.com>,
Xiaolei Li <xiaolei.li@...iatek.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Chen-Yu Tsai <wens@...e.org>,
Marc Gonzalez <marc.w.gonzalez@...e.fr>,
Mans Rullgard <mans@...sr.com>, Stefan Agner <stefan@...er.ch>,
linux-mtd@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
bcm-kernel-feedback-list@...adcom.com,
linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v4 25/35] mtd: rawnand: vf610: convert driver to
nand_scan()
On Fri, 20 Jul 2018 17:15:17 +0200
Miquel Raynal <miquel.raynal@...tlin.com> 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 <miquel.raynal@...tlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@...tlin.com>
> ---
> drivers/mtd/nand/raw/vf610_nfc.c | 127 ++++++++++++++++++++-------------------
> 1 file changed, 66 insertions(+), 61 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/vf610_nfc.c b/drivers/mtd/nand/raw/vf610_nfc.c
> index d5a22fc96878..6f6dcbf9095b 100644
> --- a/drivers/mtd/nand/raw/vf610_nfc.c
> +++ b/drivers/mtd/nand/raw/vf610_nfc.c
> @@ -747,6 +747,69 @@ static void vf610_nfc_init_controller(struct vf610_nfc *nfc)
> }
> }
>
> +static int vf610_nfc_attach_chip(struct nand_chip *chip)
> +{
> + struct mtd_info *mtd = nand_to_mtd(chip);
> + struct vf610_nfc *nfc = mtd_to_nfc(mtd);
> +
> + vf610_nfc_init_controller(nfc);
> +
> + /* Bad block options. */
> + if (chip->bbt_options & NAND_BBT_USE_FLASH)
> + chip->bbt_options |= NAND_BBT_NO_OOB;
> +
> + /* Single buffer only, max 256 OOB minus ECC status */
> + if (mtd->writesize + mtd->oobsize > PAGE_2K + OOB_MAX - 8) {
> + dev_err(nfc->dev, "Unsupported flash page size\n");
> + return -ENXIO;
> + }
> +
> + if (chip->ecc.mode != NAND_ECC_HW)
> + return 0;
> +
> + if (mtd->writesize != PAGE_2K && mtd->oobsize < 64) {
> + dev_err(nfc->dev, "Unsupported flash with hwecc\n");
> + return -ENXIO;
> + }
> +
> + if (chip->ecc.size != mtd->writesize) {
> + dev_err(nfc->dev, "Step size needs to be page size\n");
> + return -ENXIO;
> + }
> +
> + /* Only 64 byte ECC layouts known */
> + if (mtd->oobsize > 64)
> + mtd->oobsize = 64;
> +
> + /* Use default large page ECC layout defined in NAND core */
> + mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
> + if (chip->ecc.strength == 32) {
> + nfc->ecc_mode = ECC_60_BYTE;
> + chip->ecc.bytes = 60;
> + } else if (chip->ecc.strength == 24) {
> + nfc->ecc_mode = ECC_45_BYTE;
> + chip->ecc.bytes = 45;
> + } else {
> + dev_err(nfc->dev, "Unsupported ECC strength\n");
> + return -ENXIO;
> + }
> +
> + chip->ecc.read_page = vf610_nfc_read_page;
> + chip->ecc.write_page = vf610_nfc_write_page;
> + chip->ecc.read_page_raw = vf610_nfc_read_page_raw;
> + chip->ecc.write_page_raw = vf610_nfc_write_page_raw;
> + chip->ecc.read_oob = vf610_nfc_read_oob;
> + chip->ecc.write_oob = vf610_nfc_write_oob;
> +
> + chip->ecc.size = PAGE_2K;
> +
> + return 0;
> +}
> +
> +static const struct nand_controller_ops vf610_nfc_controller_ops = {
> + .attach_chip = vf610_nfc_attach_chip,
> +};
> +
> static int vf610_nfc_probe(struct platform_device *pdev)
> {
> struct vf610_nfc *nfc;
> @@ -827,67 +890,9 @@ static int vf610_nfc_probe(struct platform_device *pdev)
>
> vf610_nfc_preinit_controller(nfc);
>
> - /* first scan to find the device and get the page size */
> - err = nand_scan_ident(mtd, 1, NULL);
> - if (err)
> - goto err_disable_clk;
> -
> - vf610_nfc_init_controller(nfc);
> -
> - /* Bad block options. */
> - if (chip->bbt_options & NAND_BBT_USE_FLASH)
> - chip->bbt_options |= NAND_BBT_NO_OOB;
> -
> - /* Single buffer only, max 256 OOB minus ECC status */
> - if (mtd->writesize + mtd->oobsize > PAGE_2K + OOB_MAX - 8) {
> - dev_err(nfc->dev, "Unsupported flash page size\n");
> - err = -ENXIO;
> - goto err_disable_clk;
> - }
> -
> - if (chip->ecc.mode == NAND_ECC_HW) {
> - if (mtd->writesize != PAGE_2K && mtd->oobsize < 64) {
> - dev_err(nfc->dev, "Unsupported flash with hwecc\n");
> - err = -ENXIO;
> - goto err_disable_clk;
> - }
> -
> - if (chip->ecc.size != mtd->writesize) {
> - dev_err(nfc->dev, "Step size needs to be page size\n");
> - err = -ENXIO;
> - goto err_disable_clk;
> - }
> -
> - /* Only 64 byte ECC layouts known */
> - if (mtd->oobsize > 64)
> - mtd->oobsize = 64;
> -
> - /* Use default large page ECC layout defined in NAND core */
> - mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
> - if (chip->ecc.strength == 32) {
> - nfc->ecc_mode = ECC_60_BYTE;
> - chip->ecc.bytes = 60;
> - } else if (chip->ecc.strength == 24) {
> - nfc->ecc_mode = ECC_45_BYTE;
> - chip->ecc.bytes = 45;
> - } else {
> - dev_err(nfc->dev, "Unsupported ECC strength\n");
> - err = -ENXIO;
> - goto err_disable_clk;
> - }
> -
> - chip->ecc.read_page = vf610_nfc_read_page;
> - chip->ecc.write_page = vf610_nfc_write_page;
> - chip->ecc.read_page_raw = vf610_nfc_read_page_raw;
> - chip->ecc.write_page_raw = vf610_nfc_write_page_raw;
> - chip->ecc.read_oob = vf610_nfc_read_oob;
> - chip->ecc.write_oob = vf610_nfc_write_oob;
> -
> - chip->ecc.size = PAGE_2K;
> - }
> -
> - /* second phase scan */
> - err = nand_scan_tail(mtd);
> + /* Scan the NAND chip */
> + chip->dummy_controller.ops = &vf610_nfc_controller_ops;
> + err = nand_scan(mtd, 1);
> if (err)
> goto err_disable_clk;
>
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