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Sun, 20 Oct 2024 06:28:07 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Sun, 20 Oct 2024 21:28:04 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Sun, 20 Oct 2024 21:28:04 +0800 From: Sky Huang To: Matthias Brugger , Miquel Raynal , AngeloGioacchino Del Regno , Richard Weinberger , Vignesh Raghavendra , Daniel Golle , Chia-Lin Kao , "Mika Westerberg" , Cheng Ming Lin , , , , CC: Steven Liu , Sky.Huang Subject: [RFC PATCH nand/next 1/4] mtd: nand: Create param.c to do CRC check and bitwise majority for Parameter & CASN page Date: Sun, 20 Oct 2024 21:27:19 +0800 Message-ID: <20241020132722.20565-2-SkyLake.Huang@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20241020132722.20565-1-SkyLake.Huang@mediatek.com> References: <20241020132722.20565-1-SkyLake.Huang@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--11.493500-8.000000 X-TMASE-MatchedRID: dY/STlX7LWI0Z9sXcK7F6V3oTRqVXDv5sXPI9D4Uri5aW2Ktn+I8/v5Q PMcorVJC8AyWk2NFMNZM8qdoCvOVvj13WcdbGR6Qtw+xHnsmQjPDHSNFHFxB801KG1YrOQW/Oqn cbTLK4XiFuNbf28fb6PCUhGX/S6sVNngTMoCUVRTkKCFOKwAEzO3+iQEtoSj401IIGqgAbw3Z6K rkcB2NwXa9QqC2Cxib3BTxUdcaKkIfE8yM4pjsD23U7j2vVURrxEHRux+uk8hfNjF5BHUO+5hdg toyVDGsvXehZr+2YIXDWemDa0iNuN+SRkUpHtt1peNVPeL5BOo= X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--11.493500-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 893E3C62F29F17B06B98F8A0F5729048C8707D38DE12E4F30D58DAF9AF2EB93C2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241020_062812_512689_B713C826 X-CRM114-Status: GOOD ( 21.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "Sky.Huang" Create drivers/mtd/nand/param.c so ONFI parameter page & CASN page can both use nanddev_crc16() and nanddev_bit_wise_majority() directly like this: * For ONFI Parameter page: onfi_crc16() -> nanddev_crc16() * For CASN page: nanddev_crc16() nanddev_bit_wise_majority() is same as nand_bit_wise_majority(). nanddev_crc16() is same as onfi_crc16(). But there are lots of onfi_crc16() call, so keep onfi_crc16() there and hook it to nanddev_crc16(). Signed-off-by: Sky Huang --- drivers/mtd/nand/Makefile | 2 +- drivers/mtd/nand/param.c | 52 ++++++++++++++++++++++++++++++++ drivers/mtd/nand/raw/nand_onfi.c | 43 ++------------------------ include/linux/mtd/param.h | 20 ++++++++++++ 4 files changed, 76 insertions(+), 41 deletions(-) create mode 100644 drivers/mtd/nand/param.c create mode 100644 include/linux/mtd/param.h diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 19e1291ac4d5..790bde0148d1 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 -nandcore-objs := core.o bbt.o +nandcore-objs := core.o bbt.o param.o obj-$(CONFIG_MTD_NAND_CORE) += nandcore.o obj-$(CONFIG_MTD_NAND_ECC_MEDIATEK) += ecc-mtk.o diff --git a/drivers/mtd/nand/param.c b/drivers/mtd/nand/param.c new file mode 100644 index 000000000000..f67b9fe633d9 --- /dev/null +++ b/drivers/mtd/nand/param.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023 - Mediatek + * + * Author: Sky Huang + */ + +#include + +u16 nanddev_crc16(u16 crc, u8 const *p, size_t len) +{ + int i; + + while (len--) { + crc ^= *p++ << 8; + for (i = 0; i < 8; i++) + crc = (crc << 1) ^ ((crc & 0x8000) ? 0x8005 : 0); + } + + return crc; +} + +/* + * Recover data with bit-wise majority + */ +void nanddev_bit_wise_majority(const void **srcbufs, + unsigned int nsrcbufs, + void *dstbuf, + unsigned int bufsize) +{ + int i, j, k; + + for (i = 0; i < bufsize; i++) { + u8 val = 0; + + for (j = 0; j < 8; j++) { + unsigned int cnt = 0; + + for (k = 0; k < nsrcbufs; k++) { + const u8 *srcbuf = srcbufs[k]; + + if (srcbuf[i] & BIT(j)) + cnt++; + } + + if (cnt > nsrcbufs / 2) + val |= BIT(j); + } + + ((u8 *)dstbuf)[i] = val; + } +} diff --git a/drivers/mtd/nand/raw/nand_onfi.c b/drivers/mtd/nand/raw/nand_onfi.c index 861975e44b55..5d330dd53e8f 100644 --- a/drivers/mtd/nand/raw/nand_onfi.c +++ b/drivers/mtd/nand/raw/nand_onfi.c @@ -12,6 +12,7 @@ * This file contains all ONFI helpers. */ +#include #include #include "internals.h" @@ -20,14 +21,7 @@ u16 onfi_crc16(u16 crc, u8 const *p, size_t len) { - int i; - while (len--) { - crc ^= *p++ << 8; - for (i = 0; i < 8; i++) - crc = (crc << 1) ^ ((crc & 0x8000) ? 0x8005 : 0); - } - - return crc; + return nanddev_crc16(crc, p, len); } /* Parse the Extended Parameter Page. */ @@ -107,37 +101,6 @@ static int nand_flash_detect_ext_param_page(struct nand_chip *chip, return ret; } -/* - * Recover data with bit-wise majority - */ -static void nand_bit_wise_majority(const void **srcbufs, - unsigned int nsrcbufs, - void *dstbuf, - unsigned int bufsize) -{ - int i, j, k; - - for (i = 0; i < bufsize; i++) { - u8 val = 0; - - for (j = 0; j < 8; j++) { - unsigned int cnt = 0; - - for (k = 0; k < nsrcbufs; k++) { - const u8 *srcbuf = srcbufs[k]; - - if (srcbuf[i] & BIT(j)) - cnt++; - } - - if (cnt > nsrcbufs / 2) - val |= BIT(j); - } - - ((u8 *)dstbuf)[i] = val; - } -} - /* * Check if the NAND chip is ONFI compliant, returns 1 if it is, 0 otherwise. */ @@ -200,7 +163,7 @@ int nand_onfi_detect(struct nand_chip *chip) srcbufs[j] = pbuf + j; pr_warn("Could not find a valid ONFI parameter page, trying bit-wise majority to recover it\n"); - nand_bit_wise_majority(srcbufs, ONFI_PARAM_PAGES, pbuf, + nanddev_bit_wise_majority(srcbufs, ONFI_PARAM_PAGES, pbuf, sizeof(*pbuf)); crc = onfi_crc16(ONFI_CRC_BASE, (u8 *)pbuf, 254); diff --git a/include/linux/mtd/param.h b/include/linux/mtd/param.h new file mode 100644 index 000000000000..39636f66f1b4 --- /dev/null +++ b/include/linux/mtd/param.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2023 - Mediatek + * + * Author: Sky Huang + */ + +#ifndef __LINUX_NAND_PARAM +#define __LINUX_NAND_PARAM + +#include + +u16 nanddev_crc16(u16 crc, u8 const *p, size_t len); +void nanddev_bit_wise_majority(const void **srcbufs, + unsigned int nsrcbufs, + void *dstbuf, + unsigned int bufsize); + +#endif /* __LINUX_NAND_PARAM */ +