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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,
	Nicolas Ferre <nicolas.ferre@atmel.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>,
	Alexandre Belloni <alexandre.belloni@free-electrons.com>,
	Wenyou Yang <wenyou.yang@atmel.com>,
	Josh Wu <rainyfeeling@outlook.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>, Kamal Dasu <kdasu.kdev@gmail.com>,
	bcm-kernel-feedback-list@broadcom.com, linux-api@vger.kernel.org,
	Boris Brezillon <boris.brezillon@free-electrons.com>
Subject: [PATCH v3 35/52] mtd: nand: fsmc: switch to mtd_ooblayout_ops
Date: Fri, 26 Feb 2016 01:57:43 +0100	[thread overview]
Message-ID: <1456448280-27788-36-git-send-email-boris.brezillon@free-electrons.com> (raw)
In-Reply-To: <1456448280-27788-1-git-send-email-boris.brezillon@free-electrons.com>

Implementing the mtd_ooblayout_ops interface is the new way of exposing
ECC/OOB layout to MTD users.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
 drivers/mtd/nand/fsmc_nand.c | 298 ++++++++++++-------------------------------
 1 file changed, 82 insertions(+), 216 deletions(-)

diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 1bdcd4f..275a98c 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -39,212 +39,6 @@
 #include <linux/amba/bus.h>
 #include <mtd/mtd-abi.h>
 
-static struct nand_ecclayout fsmc_ecc1_128_layout = {
-	.eccbytes = 24,
-	.eccpos = {2, 3, 4, 18, 19, 20, 34, 35, 36, 50, 51, 52,
-		66, 67, 68, 82, 83, 84, 98, 99, 100, 114, 115, 116},
-	.oobfree = {
-		{.offset = 8, .length = 8},
-		{.offset = 24, .length = 8},
-		{.offset = 40, .length = 8},
-		{.offset = 56, .length = 8},
-		{.offset = 72, .length = 8},
-		{.offset = 88, .length = 8},
-		{.offset = 104, .length = 8},
-		{.offset = 120, .length = 8}
-	}
-};
-
-static struct nand_ecclayout fsmc_ecc1_64_layout = {
-	.eccbytes = 12,
-	.eccpos = {2, 3, 4, 18, 19, 20, 34, 35, 36, 50, 51, 52},
-	.oobfree = {
-		{.offset = 8, .length = 8},
-		{.offset = 24, .length = 8},
-		{.offset = 40, .length = 8},
-		{.offset = 56, .length = 8},
-	}
-};
-
-static struct nand_ecclayout fsmc_ecc1_16_layout = {
-	.eccbytes = 3,
-	.eccpos = {2, 3, 4},
-	.oobfree = {
-		{.offset = 8, .length = 8},
-	}
-};
-
-/*
- * ECC4 layout for NAND of pagesize 8192 bytes & OOBsize 256 bytes. 13*16 bytes
- * of OB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block and 46
- * bytes are free for use.
- */
-static struct nand_ecclayout fsmc_ecc4_256_layout = {
-	.eccbytes = 208,
-	.eccpos = {  2,   3,   4,   5,   6,   7,   8,
-		9,  10,  11,  12,  13,  14,
-		18,  19,  20,  21,  22,  23,  24,
-		25,  26,  27,  28,  29,  30,
-		34,  35,  36,  37,  38,  39,  40,
-		41,  42,  43,  44,  45,  46,
-		50,  51,  52,  53,  54,  55,  56,
-		57,  58,  59,  60,  61,  62,
-		66,  67,  68,  69,  70,  71,  72,
-		73,  74,  75,  76,  77,  78,
-		82,  83,  84,  85,  86,  87,  88,
-		89,  90,  91,  92,  93,  94,
-		98,  99, 100, 101, 102, 103, 104,
-		105, 106, 107, 108, 109, 110,
-		114, 115, 116, 117, 118, 119, 120,
-		121, 122, 123, 124, 125, 126,
-		130, 131, 132, 133, 134, 135, 136,
-		137, 138, 139, 140, 141, 142,
-		146, 147, 148, 149, 150, 151, 152,
-		153, 154, 155, 156, 157, 158,
-		162, 163, 164, 165, 166, 167, 168,
-		169, 170, 171, 172, 173, 174,
-		178, 179, 180, 181, 182, 183, 184,
-		185, 186, 187, 188, 189, 190,
-		194, 195, 196, 197, 198, 199, 200,
-		201, 202, 203, 204, 205, 206,
-		210, 211, 212, 213, 214, 215, 216,
-		217, 218, 219, 220, 221, 222,
-		226, 227, 228, 229, 230, 231, 232,
-		233, 234, 235, 236, 237, 238,
-		242, 243, 244, 245, 246, 247, 248,
-		249, 250, 251, 252, 253, 254
-	},
-	.oobfree = {
-		{.offset = 15, .length = 3},
-		{.offset = 31, .length = 3},
-		{.offset = 47, .length = 3},
-		{.offset = 63, .length = 3},
-		{.offset = 79, .length = 3},
-		{.offset = 95, .length = 3},
-		{.offset = 111, .length = 3},
-		{.offset = 127, .length = 3},
-		{.offset = 143, .length = 3},
-		{.offset = 159, .length = 3},
-		{.offset = 175, .length = 3},
-		{.offset = 191, .length = 3},
-		{.offset = 207, .length = 3},
-		{.offset = 223, .length = 3},
-		{.offset = 239, .length = 3},
-		{.offset = 255, .length = 1}
-	}
-};
-
-/*
- * ECC4 layout for NAND of pagesize 4096 bytes & OOBsize 224 bytes. 13*8 bytes
- * of OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block & 118
- * bytes are free for use.
- */
-static struct nand_ecclayout fsmc_ecc4_224_layout = {
-	.eccbytes = 104,
-	.eccpos = {  2,   3,   4,   5,   6,   7,   8,
-		9,  10,  11,  12,  13,  14,
-		18,  19,  20,  21,  22,  23,  24,
-		25,  26,  27,  28,  29,  30,
-		34,  35,  36,  37,  38,  39,  40,
-		41,  42,  43,  44,  45,  46,
-		50,  51,  52,  53,  54,  55,  56,
-		57,  58,  59,  60,  61,  62,
-		66,  67,  68,  69,  70,  71,  72,
-		73,  74,  75,  76,  77,  78,
-		82,  83,  84,  85,  86,  87,  88,
-		89,  90,  91,  92,  93,  94,
-		98,  99, 100, 101, 102, 103, 104,
-		105, 106, 107, 108, 109, 110,
-		114, 115, 116, 117, 118, 119, 120,
-		121, 122, 123, 124, 125, 126
-	},
-	.oobfree = {
-		{.offset = 15, .length = 3},
-		{.offset = 31, .length = 3},
-		{.offset = 47, .length = 3},
-		{.offset = 63, .length = 3},
-		{.offset = 79, .length = 3},
-		{.offset = 95, .length = 3},
-		{.offset = 111, .length = 3},
-		{.offset = 127, .length = 97}
-	}
-};
-
-/*
- * ECC4 layout for NAND of pagesize 4096 bytes & OOBsize 128 bytes. 13*8 bytes
- * of OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block & 22
- * bytes are free for use.
- */
-static struct nand_ecclayout fsmc_ecc4_128_layout = {
-	.eccbytes = 104,
-	.eccpos = {  2,   3,   4,   5,   6,   7,   8,
-		9,  10,  11,  12,  13,  14,
-		18,  19,  20,  21,  22,  23,  24,
-		25,  26,  27,  28,  29,  30,
-		34,  35,  36,  37,  38,  39,  40,
-		41,  42,  43,  44,  45,  46,
-		50,  51,  52,  53,  54,  55,  56,
-		57,  58,  59,  60,  61,  62,
-		66,  67,  68,  69,  70,  71,  72,
-		73,  74,  75,  76,  77,  78,
-		82,  83,  84,  85,  86,  87,  88,
-		89,  90,  91,  92,  93,  94,
-		98,  99, 100, 101, 102, 103, 104,
-		105, 106, 107, 108, 109, 110,
-		114, 115, 116, 117, 118, 119, 120,
-		121, 122, 123, 124, 125, 126
-	},
-	.oobfree = {
-		{.offset = 15, .length = 3},
-		{.offset = 31, .length = 3},
-		{.offset = 47, .length = 3},
-		{.offset = 63, .length = 3},
-		{.offset = 79, .length = 3},
-		{.offset = 95, .length = 3},
-		{.offset = 111, .length = 3},
-		{.offset = 127, .length = 1}
-	}
-};
-
-/*
- * ECC4 layout for NAND of pagesize 2048 bytes & OOBsize 64 bytes. 13*4 bytes of
- * OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block and 10
- * bytes are free for use.
- */
-static struct nand_ecclayout fsmc_ecc4_64_layout = {
-	.eccbytes = 52,
-	.eccpos = {  2,   3,   4,   5,   6,   7,   8,
-		9,  10,  11,  12,  13,  14,
-		18,  19,  20,  21,  22,  23,  24,
-		25,  26,  27,  28,  29,  30,
-		34,  35,  36,  37,  38,  39,  40,
-		41,  42,  43,  44,  45,  46,
-		50,  51,  52,  53,  54,  55,  56,
-		57,  58,  59,  60,  61,  62,
-	},
-	.oobfree = {
-		{.offset = 15, .length = 3},
-		{.offset = 31, .length = 3},
-		{.offset = 47, .length = 3},
-		{.offset = 63, .length = 1},
-	}
-};
-
-/*
- * ECC4 layout for NAND of pagesize 512 bytes & OOBsize 16 bytes. 13 bytes of
- * OOB size is reserved for ECC, Byte no. 4 & 5 reserved for bad block and One
- * byte is free for use.
- */
-static struct nand_ecclayout fsmc_ecc4_16_layout = {
-	.eccbytes = 13,
-	.eccpos = { 0,  1,  2,  3,  6,  7, 8,
-		9, 10, 11, 12, 13, 14
-	},
-	.oobfree = {
-		{.offset = 15, .length = 1},
-	}
-};
-
 /*
  * ECC placement definitions in oobfree type format.
  * There are 13 bytes of ecc for every 512 byte block and it has to be read
@@ -274,6 +68,84 @@ static struct fsmc_eccplace fsmc_ecc4_sp_place = {
 	}
 };
 
+static int fsmc_ecc1_ooblayout_ecc(struct mtd_info *mtd, int section,
+				   struct mtd_oob_region *oobregion)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	if (section >= chip->ecc.steps)
+		return -ERANGE;
+
+	oobregion->offset = (section * 16) + 2;
+	oobregion->length = 3;
+
+	return 0;
+}
+
+static int fsmc_ecc1_ooblayout_free(struct mtd_info *mtd, int section,
+				    struct mtd_oob_region *oobregion)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	if (section >= chip->ecc.steps)
+		return -ERANGE;
+
+	oobregion->offset = (section * 16) + 8;
+
+	if (section < chip->ecc.steps - 1)
+		oobregion->length = 8;
+	else
+		oobregion->length = mtd->oobsize - oobregion->offset;
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops fsmc_ecc1_ooblayout_ops = {
+	.ecc = fsmc_ecc1_ooblayout_ecc,
+	.free = fsmc_ecc1_ooblayout_free,
+};
+
+static int fsmc_ecc4_ooblayout_ecc(struct mtd_info *mtd, int section,
+				   struct mtd_oob_region *oobregion)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	if (section >= chip->ecc.steps)
+		return -ERANGE;
+
+	oobregion->length = chip->ecc.bytes;
+
+	if (!section && mtd->writesize <= 512)
+		oobregion->offset = 0;
+	else
+		oobregion->offset = (section * 16) + 2;
+
+	return 0;
+}
+
+static int fsmc_ecc4_ooblayout_free(struct mtd_info *mtd, int section,
+				    struct mtd_oob_region *oobregion)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+
+	if (section >= chip->ecc.steps)
+		return -ERANGE;
+
+	oobregion->offset = (section * 16) + 15;
+
+	if (section < chip->ecc.steps - 1)
+		oobregion->length = 3;
+	else
+		oobregion->length = mtd->oobsize - oobregion->offset;
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops fsmc_ecc4_ooblayout_ops = {
+	.ecc = fsmc_ecc4_ooblayout_ecc,
+	.free = fsmc_ecc4_ooblayout_free,
+};
+
 /**
  * struct fsmc_nand_data - structure for FSMC NAND device state
  *
@@ -1084,23 +956,18 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 	if (AMBA_REV_BITS(host->pid) >= 8) {
 		switch (mtd->oobsize) {
 		case 16:
-			nand->ecc.layout = &fsmc_ecc4_16_layout;
 			host->ecc_place = &fsmc_ecc4_sp_place;
 			break;
 		case 64:
-			nand->ecc.layout = &fsmc_ecc4_64_layout;
 			host->ecc_place = &fsmc_ecc4_lp_place;
 			break;
 		case 128:
-			nand->ecc.layout = &fsmc_ecc4_128_layout;
 			host->ecc_place = &fsmc_ecc4_lp_place;
 			break;
 		case 224:
-			nand->ecc.layout = &fsmc_ecc4_224_layout;
 			host->ecc_place = &fsmc_ecc4_lp_place;
 			break;
 		case 256:
-			nand->ecc.layout = &fsmc_ecc4_256_layout;
 			host->ecc_place = &fsmc_ecc4_lp_place;
 			break;
 		default:
@@ -1109,6 +976,8 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 			ret = -EINVAL;
 			goto err_probe;
 		}
+
+		mtd_set_ooblayout(mtd, &fsmc_ecc4_ooblayout_ops);
 	} else {
 		switch (nand->ecc.mode) {
 		case NAND_ECC_HW:
@@ -1135,13 +1004,10 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 		if (nand->ecc.mode != NAND_ECC_SOFT_BCH) {
 			switch (mtd->oobsize) {
 			case 16:
-				nand->ecc.layout = &fsmc_ecc1_16_layout;
-				break;
 			case 64:
-				nand->ecc.layout = &fsmc_ecc1_64_layout;
-				break;
 			case 128:
-				nand->ecc.layout = &fsmc_ecc1_128_layout;
+				mtd_set_ooblayout(mtd,
+						  &fsmc_ecc1_ooblayout_ops);
 				break;
 			default:
 				dev_warn(&pdev->dev,
-- 
2.1.4

  parent reply	other threads:[~2016-02-26  1:07 UTC|newest]

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-26  0:57 [PATCH v3 00/52] mtd: rework ECC layout definition Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 01/52] mtd: kill the ecclayout->oobavail field Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 02/52] mtd: create an mtd_oobavail() helper and make use of it Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 03/52] mtd: mtdswap: remove useless if (!mtd->ecclayout) test Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 04/52] mtd: nand: simplify nand_bch_init() usage Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 05/52] mtd: add mtd_ooblayout_xxx() helper functions Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 06/52] mtd: use mtd_ooblayout_xxx() helpers where appropriate Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 07/52] mtd: nand: core: " Boris Brezillon
2016-02-26 14:35   ` Harvey Hunt
2016-02-26 15:10     ` Boris Brezillon
2016-02-26 15:17       ` Harvey Hunt
2016-02-26 18:33         ` Boris Brezillon
2016-02-29 10:33           ` Harvey Hunt
2016-02-26  0:57 ` [PATCH v3 08/52] mtd: nand: atmel: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 09/52] mtd: nand: fsl_ifc: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 10/52] mtd: nand: gpmi: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 11/52] mtd: nand: lpc32xx: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 12/52] mtd: nand: omap2: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 13/52] mtd: onenand: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 14/52] mtd: add mtd_set_ecclayout() helper function Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 15/52] mtd: use mtd_set_ecclayout() where appropriate Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 16/52] mtd: nand: " Boris Brezillon
2016-03-05  2:26   ` Brian Norris
2016-03-05  8:53     ` Boris Brezillon
2016-03-05  9:01       ` Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 17/52] mtd: onenand: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 18/52] mtd: docg3: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 19/52] mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 20/52] mtd: docg3: switch to mtd_ooblayout_ops Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 21/52] mtd: nand: implement the default mtd_ooblayout_ops Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 22/52] mtd: nand: bch: switch to mtd_ooblayout_ops Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 23/52] mtd: nand: sharpsl: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 24/52] mtd: nand: jz4740: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 25/52] mtd: nand: atmel: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 26/52] mtd: nand: bf5xx: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 27/52] mtd: nand: brcm: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 28/52] mtd: nand: cafe: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 29/52] mtd: nand: davinci: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 30/52] mtd: nand: denali: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 31/52] mtd: nand: diskonchip: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 32/52] mtd: nand: docg4: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 33/52] mtd: nand: fsl_elbc: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 34/52] mtd: nand: fsl_ifc: " Boris Brezillon
2016-02-26  0:57 ` Boris Brezillon [this message]
2016-02-26  0:57 ` [PATCH v3 36/52] mtd: nand: fsmc: get rid of the fsmc_nand_eccplace struct Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 37/52] mtd: nand: gpmi: switch to mtd_ooblayout_ops Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 38/52] mtd: nand: hisi504: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 39/52] mtd: nand: jz4780: " Boris Brezillon
2016-02-29 10:45   ` Harvey Hunt
2016-02-26  0:57 ` [PATCH v3 40/52] mtd: nand: lpc32xx: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 41/52] mtd: nand: mxc: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 42/52] mtd: nand: omap2: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 43/52] mtd: nand: pxa3xx: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 44/52] mtd: nand: s3c2410: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 45/52] mtd: nand: sh_flctl: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 46/52] mtd: nand: sm_common: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 47/52] mtd: nand: sunxi: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 48/52] mtd: nand: vf610: " Boris Brezillon
2016-02-26 19:43   ` Stefan Agner
2016-02-26 20:43     ` Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 49/52] mtd: onenand: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 50/52] staging: mt29f_spinand: " Boris Brezillon
2016-02-26  0:57 ` [PATCH v3 51/52] mtd: nand: kill the ecc->layout field Boris Brezillon
2016-02-26  0:58 ` [PATCH v3 52/52] mtd: kill the nand_ecclayout struct Boris Brezillon
2016-02-26  1:27 ` [PATCH v3 00/52] mtd: rework ECC layout definition Stefan Agner
2016-02-26  2:16   ` Boris Brezillon

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