From: Boris Brezillon <boris.brezillon@free-electrons.com>
To: David Woodhouse <dwmw2@infradead.org>,
Brian Norris <computersforpeace@gmail.com>,
linux-mtd@lists.infradead.org
Cc: Daniel Mack <daniel@zonque.org>,
Haojian Zhuang <haojian.zhuang@gmail.com>,
Robert Jarzmik <robert.jarzmik@free.fr>,
Kukjin Kim <kgene@kernel.org>,
Krzysztof Kozlowski <k.kozlowski@samsung.com>,
linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Ralf Baechle <ralf@linux-mips.org>,
linux-mips@linux-mips.org, Josh Wu <josh.wu@atmel.com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Chen-Yu Tsai <wens@csie.org>,
linux-sunxi@googlegroups.com, Stefan Agner <stefan@agner.ch>,
Kyungmin Park <kyungmin.park@samsung.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
punnaiah choudary kalluri <punnaia@xilinx.com>,
Priit Laes <plaes@plaes.org>,
Boris Brezillon <boris.brezillon@free-electrons.com>
Subject: [PATCH v2 21/51] mtd: nand: implement the default mtd_ooblayout_ops
Date: Thu, 4 Feb 2016 11:06:44 +0100 [thread overview]
Message-ID: <1454580434-32078-22-git-send-email-boris.brezillon@free-electrons.com> (raw)
In-Reply-To: <1454580434-32078-1-git-send-email-boris.brezillon@free-electrons.com>
Replace the default nand_ecclayout definitions for large and small page
devices with the equivalent mtd_ooblayout_ops.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
drivers/mtd/nand/nand_base.c | 147 ++++++++++++++++++++++++++++---------------
include/linux/mtd/nand.h | 3 +
2 files changed, 99 insertions(+), 51 deletions(-)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index a01b472..e4dc62b 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -48,50 +48,6 @@
#include <linux/mtd/partitions.h>
#include <linux/of_mtd.h>
-/* Define default oob placement schemes for large and small page devices */
-static struct nand_ecclayout nand_oob_8 = {
- .eccbytes = 3,
- .eccpos = {0, 1, 2},
- .oobfree = {
- {.offset = 3,
- .length = 2},
- {.offset = 6,
- .length = 2} }
-};
-
-static struct nand_ecclayout nand_oob_16 = {
- .eccbytes = 6,
- .eccpos = {0, 1, 2, 3, 6, 7},
- .oobfree = {
- {.offset = 8,
- . length = 8} }
-};
-
-static struct nand_ecclayout nand_oob_64 = {
- .eccbytes = 24,
- .eccpos = {
- 40, 41, 42, 43, 44, 45, 46, 47,
- 48, 49, 50, 51, 52, 53, 54, 55,
- 56, 57, 58, 59, 60, 61, 62, 63},
- .oobfree = {
- {.offset = 2,
- .length = 38} }
-};
-
-static struct nand_ecclayout nand_oob_128 = {
- .eccbytes = 48,
- .eccpos = {
- 80, 81, 82, 83, 84, 85, 86, 87,
- 88, 89, 90, 91, 92, 93, 94, 95,
- 96, 97, 98, 99, 100, 101, 102, 103,
- 104, 105, 106, 107, 108, 109, 110, 111,
- 112, 113, 114, 115, 116, 117, 118, 119,
- 120, 121, 122, 123, 124, 125, 126, 127},
- .oobfree = {
- {.offset = 2,
- .length = 78} }
-};
-
static int nand_get_device(struct mtd_info *mtd, int new_state);
static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
@@ -103,6 +59,92 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
*/
DEFINE_LED_TRIGGER(nand_led_trigger);
+/* Define default oob placement schemes for large and small page devices */
+static int nand_ooblayout_ecc_sp(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+
+ if (section > 1)
+ return -ERANGE;
+
+ if (!section) {
+ oobregion->offset = 0;
+ oobregion->length = 4;
+ } else {
+ oobregion->offset = 6;
+ oobregion->length = (ecc->bytes * ecc->steps) - 4;
+ }
+
+ return 0;
+}
+
+static int nand_ooblayout_free_sp(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ if (section > 1)
+ return -ERANGE;
+
+ if (mtd->oobsize == 16) {
+ if (section)
+ return -ERANGE;
+
+ oobregion->length = 8;
+ oobregion->offset = 8;
+ } else {
+ oobregion->length = 2;
+ if (!section)
+ oobregion->offset = 3;
+ else
+ oobregion->offset = 6;
+ }
+
+ return 0;
+}
+
+const struct mtd_ooblayout_ops nand_ooblayout_sp_ops = {
+ .ecc = nand_ooblayout_ecc_sp,
+ .free = nand_ooblayout_free_sp,
+};
+EXPORT_SYMBOL_GPL(nand_ooblayout_sp_ops);
+
+static int nand_ooblayout_ecc_lp(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+
+ if (section)
+ return -ERANGE;
+
+ oobregion->length = ecc->bytes * ecc->steps;
+ oobregion->offset = mtd->oobsize - oobregion->length;
+
+ return 0;
+}
+
+static int nand_ooblayout_free_lp(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+
+ if (section)
+ return -ERANGE;
+
+ oobregion->length = mtd->oobsize - (ecc->bytes * ecc->steps) - 2;
+ oobregion->offset = 2;
+
+ return 0;
+}
+
+const struct mtd_ooblayout_ops nand_ooblayout_lp_ops = {
+ .ecc = nand_ooblayout_ecc_lp,
+ .free = nand_ooblayout_free_lp,
+};
+EXPORT_SYMBOL_GPL(nand_ooblayout_lp_ops);
+
static int check_offs_len(struct mtd_info *mtd,
loff_t ofs, uint64_t len)
{
@@ -4119,21 +4161,24 @@ int nand_scan_tail(struct mtd_info *mtd)
chip->oob_poi = chip->buffers->databuf + mtd->writesize;
/*
+ * Set the provided ECC layout. If ecc->layout is NULL, the MTD core
+ * will just leave mtd->ooblayout to NULL, if it's not NULL, it will
+ * set ->ooblayout to the default ecclayout wrapper.
+ */
+ mtd_set_ecclayout(mtd, ecc->layout);
+
+ /*
* If no default placement scheme is given, select an appropriate one.
*/
- if (!ecc->layout && (ecc->mode != NAND_ECC_SOFT_BCH)) {
+ if (!mtd->ooblayout && (ecc->mode != NAND_ECC_SOFT_BCH)) {
switch (mtd->oobsize) {
case 8:
- ecc->layout = &nand_oob_8;
- break;
case 16:
- ecc->layout = &nand_oob_16;
+ mtd_set_ooblayout(mtd, &nand_ooblayout_sp_ops);
break;
case 64:
- ecc->layout = &nand_oob_64;
- break;
case 128:
- ecc->layout = &nand_oob_128;
+ mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
break;
default:
pr_warn("No oob scheme defined for oobsize %d\n",
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 7604f4b..82a005a 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -740,6 +740,9 @@ struct nand_chip {
void *priv;
};
+extern const struct mtd_ooblayout_ops nand_ooblayout_sp_ops;
+extern const struct mtd_ooblayout_ops nand_ooblayout_lp_ops;
+
static inline void nand_set_flash_node(struct nand_chip *chip,
struct device_node *np)
{
--
2.1.4
next prev parent reply other threads:[~2016-02-04 10:22 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-04 10:06 [PATCH v2 00/51] mtd: rework ECC layout definition Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 01/51] mtd: kill the ecclayout->oobavail field Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 02/51] mtd: create an mtd_oobavail() helper and make use of it Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 03/51] mtd: mtdswap: remove useless if (!mtd->ecclayout) test Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 04/51] mtd: nand: simplify nand_bch_init() usage Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 05/51] mtd: add mtd_ooblayout_xxx() helper functions Boris Brezillon
2016-02-05 7:35 ` Boris Brezillon
2016-02-05 9:27 ` Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 06/51] mtd: use mtd_ooblayout_xxx() helpers where appropriate Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 07/51] mtd: nand: core: " Boris Brezillon
2016-02-05 9:31 ` Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 08/51] mtd: nand: atmel: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 09/51] mtd: nand: fsl_ifc: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 10/51] mtd: nand: gpmi: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 11/51] mtd: nand: lpc32xx: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 12/51] mtd: nand: omap2: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 13/51] mtd: onenand: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 14/51] mtd: add mtd_set_ecclayout() helper function Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 15/51] mtd: use mtd_set_ecclayout() where appropriate Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 16/51] mtd: nand: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 17/51] mtd: onenand: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 18/51] mtd: docg3: " Boris Brezillon
2016-02-06 21:55 ` Robert Jarzmik
2016-02-04 10:06 ` [PATCH v2 19/51] mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 20/51] mtd: docg3: switch to mtd_ooblayout_ops Boris Brezillon
2016-02-06 21:57 ` Robert Jarzmik
2016-02-04 10:06 ` Boris Brezillon [this message]
2016-02-04 10:06 ` [PATCH v2 22/51] mtd: nand: bch: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 23/51] mtd: nand: sharpsl: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 24/51] mtd: nand: jz4740: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 25/51] mtd: nand: atmel: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 26/51] mtd: nand: bf5xx: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 27/51] mtd: nand: brcm: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 28/51] mtd: nand: cafe: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 29/51] mtd: nand: davinci: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 30/51] mtd: nand: denali: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 31/51] mtd: nand: diskonchip: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 32/51] mtd: nand: docg4: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 33/51] mtd: nand: fsl_elbc: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 34/51] mtd: nand: fsl_ifc: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 35/51] mtd: nand: fsmc: " Boris Brezillon
2016-02-04 10:06 ` [PATCH v2 36/51] mtd: nand: gpmi: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 37/51] mtd: nand: hisi504: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 38/51] mtd: nand: jz4780: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 39/51] mtd: nand: lpc32xx: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 40/51] mtd: nand: mxc: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 41/51] mtd: nand: omap2: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 42/51] mtd: nand: pxa3xx: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 43/51] mtd: nand: s3c2410: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 44/51] mtd: nand: sh_flctl: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 45/51] mtd: nand: sm_common: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 46/51] mtd: nand: sunxi: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 47/51] mtd: nand: vf610: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 48/51] mtd: onenand: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 49/51] staging: mt29f_spinand: " Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 50/51] mtd: nand: kill the ecc->layout field Boris Brezillon
2016-02-04 10:07 ` [PATCH v2 51/51] mtd: kill the nand_ecclayout struct Boris Brezillon
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