From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECDE1C433F5 for ; Thu, 6 Sep 2018 21:31:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF6C820857 for ; Thu, 6 Sep 2018 21:31:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AF6C820857 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ziswiler.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728609AbeIGCIu (ORCPT ); Thu, 6 Sep 2018 22:08:50 -0400 Received: from mout.perfora.net ([74.208.4.194]:48319 "EHLO mout.perfora.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726116AbeIGCIu (ORCPT ); Thu, 6 Sep 2018 22:08:50 -0400 Received: from localhost.net ([89.217.215.226]) by mrelay.perfora.net (mreueus002 [74.208.5.2]) with ESMTPA (Nemesis) id 0MA7R9-1g8mQ727XV-00BKug; Thu, 06 Sep 2018 23:30:35 +0200 From: Marcel Ziswiler To: linux-mtd@lists.infradead.org Cc: Marcel Ziswiler , Arnd Bergmann , Stefan Agner , linux-kernel@vger.kernel.org, Marek Vasut , Dmitry Osipenko , Richard Weinberger , David Woodhouse , Greg Kroah-Hartman , Boris Brezillon , Miquel Raynal , Brian Norris Subject: [PATCH v2 2/2] mtd: rawnand: ESMT: retrieve ECC requirements from 5th id byte Date: Thu, 6 Sep 2018 23:30:20 +0200 Message-Id: <20180906213020.7493-2-marcel@ziswiler.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20180906213020.7493-1-marcel@ziswiler.com> References: <20180906213020.7493-1-marcel@ziswiler.com> X-Provags-ID: V03:K1:8K9w1DpsH0BYVpxRT4Ko/Yv3Usfd5WMTz81W+BESfPkM0swuLbM 9iwjmq2IanD4yd5lshx7dzXxfDqV14MncSkKsHyJs3lcxOZrP7vUEum+SDR7RghhiZ2O6kZ nVEathQSbXLPmq/jQzr777gTt1KPvIWqA08MlXJUOzn0BmhQgtsxfyHuwGOP6tDOOO0Og03 IZX+NKtMP8dR1AewBx4Tw== X-UI-Out-Filterresults: notjunk:1;V01:K0:10ZmuVbvr50=:FP2RNANDCW/ibKFmmb5AIb lBLmjoaGxxblicSXcP3Q+RU3NiAmk2iWHEJA1y42SeCbgLF6EpAIonAbebbYTZzrnFaQfyXZt /cxNpCqM4TIOzKsHAaIf37gOnZkLhiNagIbKJXiJvdeUSvcbZApK5KXuM4/b4rqCEGtM2hTxZ 1ulZ3kwXCmSKQnn3hqVH/4LSBrUbQtNcGF4CalOSEjI9NuJByEh2mQB+6eUlgMQ5TGKdh/eqe EIk99Kg0Ong+/mr6FKjIBdL4rCoeO+qBG9DVsNwrjDoqBfN2H7vI+E/7eyCUb9+kOEyOFY89O JxXWlKXtQWPz3iLvtsG+RCM0G9oGjJF8IJXrRAE1WPKdi9AxO1aj0GUZ0ttvbeJGSc5jgoExU jvfAHHYbmu/K/cGMcOS5Q2VDLl0dT5+o099oi8AzMgIg/mp7xRcOWTE78E2RuRJjLxyieDBTs 10XW6mEbdfSiUCFxv7czGLERhxz5yyqRKEJcGLSdrFGWpID92F3MNsVpIIqmORvh1UfRipAHb Qc6oa8GK6s8dOa5U5JsYLmdTPD+YFZpUuemXw9DFwOE9goa6c48zTkvgoM/9jYtQ+H2gNPTPX XsLDSnADeKVVoLlzmcHSr+wuEFWkt6FPp1+zoyZhXjzNdLXNr5iYNp/NKhnVvS5DnM9zG/P88 vi2koKH0SfNNT2LQ9wmmnwgDfITWmQAvWn/2nRs8J/81QYJlioBaRIkTx83Gjfw8vDto= Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Marcel Ziswiler This patch enables support to read the ECC level from the NAND flash using ESMT SLC NAND ID byte 5 information as documented e.g. in the following data sheet: https://www.esmt.com.tw/upload/pdf/ESMT/datasheets/F59L1G81LA(2Y).pdf Signed-off-by: Marcel Ziswiler --- Changes in v2: - Also hook the new esmt_nand_manuf_ops to the ESMT entry in the nand_manufacturer table as discovered by Boris. - Also add the Makefile as well as include file changes as required. drivers/mtd/nand/raw/Makefile | 1 + drivers/mtd/nand/raw/nand_esmt.c | 46 ++++++++++++++++++++++++++++++++++++++++ drivers/mtd/nand/raw/nand_ids.c | 2 +- include/linux/mtd/rawnand.h | 1 + 4 files changed, 49 insertions(+), 1 deletion(-) create mode 100644 drivers/mtd/nand/raw/nand_esmt.c diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index d5a5f9832b88..ecb4d6cde1ee 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -60,6 +60,7 @@ obj-$(CONFIG_MTD_NAND_TEGRA) += tegra_nand.o nand-objs := nand_base.o nand_bbt.o nand_timings.o nand_ids.o nand-objs += nand_amd.o +nand-objs += nand_esmt.o nand-objs += nand_hynix.o nand-objs += nand_macronix.o nand-objs += nand_micron.o diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c new file mode 100644 index 000000000000..360d351ac043 --- /dev/null +++ b/drivers/mtd/nand/raw/nand_esmt.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Toradex AG + * + * Author: Marcel Ziswiler + */ + +#include + +static void esmt_nand_decode_id(struct nand_chip *chip) +{ + nand_decode_ext_id(chip); + + /* Extract ECC requirements from 5th id byte. */ + if (chip->id.len >= 5 && nand_is_slc(chip)) { + chip->ecc_step_ds = 512; + switch (chip->id.data[4] & 0x3) { + case 0x0: + chip->ecc_strength_ds = 4; + break; + case 0x1: + chip->ecc_strength_ds = 2; + break; + case 0x2: + chip->ecc_strength_ds = 1; + break; + default: + WARN(1, "Could not get ECC info"); + chip->ecc_step_ds = 0; + break; + } + } +} + +static int esmt_nand_init(struct nand_chip *chip) +{ + if (nand_is_slc(chip)) + chip->bbt_options |= NAND_BBT_SCAN2NDPAGE; + + return 0; +} + +const struct nand_manufacturer_ops esmt_nand_manuf_ops = { + .detect = esmt_nand_decode_id, + .init = esmt_nand_init, +}; diff --git a/drivers/mtd/nand/raw/nand_ids.c b/drivers/mtd/nand/raw/nand_ids.c index 0851cd86bf19..f904f8b987e3 100644 --- a/drivers/mtd/nand/raw/nand_ids.c +++ b/drivers/mtd/nand/raw/nand_ids.c @@ -172,7 +172,7 @@ static const struct nand_manufacturer nand_manufacturers[] = { {NAND_MFR_AMD, "AMD/Spansion", &amd_nand_manuf_ops}, {NAND_MFR_ATO, "ATO"}, {NAND_MFR_EON, "Eon"}, - {NAND_MFR_ESMT, "ESMT"}, + {NAND_MFR_ESMT, "ESMT", &esmt_nand_manuf_ops}, {NAND_MFR_FUJITSU, "Fujitsu"}, {NAND_MFR_HYNIX, "Hynix", &hynix_nand_manuf_ops}, {NAND_MFR_INTEL, "Intel"}, diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 20516fc28b74..c4656e3eeba1 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1542,6 +1542,7 @@ nand_manufacturer_name(const struct nand_manufacturer *manufacturer) extern struct nand_flash_dev nand_flash_ids[]; extern const struct nand_manufacturer_ops amd_nand_manuf_ops; +extern const struct nand_manufacturer_ops esmt_nand_manuf_ops; extern const struct nand_manufacturer_ops hynix_nand_manuf_ops; extern const struct nand_manufacturer_ops macronix_nand_manuf_ops; extern const struct nand_manufacturer_ops micron_nand_manuf_ops; -- 2.14.4