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 98972ECDFB8 for ; Fri, 20 Jul 2018 15:17:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B87A204EC for ; Fri, 20 Jul 2018 15:17:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B87A204EC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.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 S2388097AbeGTQEq (ORCPT ); Fri, 20 Jul 2018 12:04:46 -0400 Received: from mail.bootlin.com ([62.4.15.54]:54381 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388058AbeGTQEp (ORCPT ); Fri, 20 Jul 2018 12:04:45 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id 78EA1207E8; Fri, 20 Jul 2018 17:15:59 +0200 (CEST) Received: from localhost.localdomain (AAubervilliers-681-1-78-122.w90-88.abo.wanadoo.fr [90.88.20.122]) by mail.bootlin.com (Postfix) with ESMTPSA id B530A2095C; Fri, 20 Jul 2018 17:15:37 +0200 (CEST) From: Miquel Raynal To: Wenyou Yang , Josh Wu , Tudor Ambarus , Boris Brezillon , Miquel Raynal , Richard Weinberger , David Woodhouse , Brian Norris , Marek Vasut , Nicolas Ferre , Alexandre Belloni , Kamal Dasu , Masahiro Yamada , Han Xu , Harvey Hunt , Vladimir Zapolskiy , Sylvain Lemieux , Xiaolei Li , Matthias Brugger , Maxime Ripard , Chen-Yu Tsai , Marc Gonzalez , Mans Rullgard , Stefan Agner Cc: linux-mtd@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, linux-mediatek@lists.infradead.org Subject: [PATCH v4 16/35] mtd: rawnand: nandsim: convert driver to nand_scan() Date: Fri, 20 Jul 2018 17:15:08 +0200 Message-Id: <20180720151527.16038-17-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180720151527.16038-1-miquel.raynal@bootlin.com> References: <20180720151527.16038-1-miquel.raynal@bootlin.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- drivers/mtd/nand/raw/nandsim.c | 82 +++++++++++++++++++++++------------------- 1 file changed, 45 insertions(+), 37 deletions(-) diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c index 8a3b36cfe5ea..71ac034aee9c 100644 --- a/drivers/mtd/nand/raw/nandsim.c +++ b/drivers/mtd/nand/raw/nandsim.c @@ -2192,6 +2192,48 @@ static void ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) return; } +static int ns_attach_chip(struct nand_chip *chip) +{ + unsigned int eccsteps, eccbytes; + + if (!bch) + return 0; + + if (!mtd_nand_has_bch()) { + NS_ERR("BCH ECC support is disabled\n"); + return -EINVAL; + } + + /* Use 512-byte ecc blocks */ + eccsteps = nsmtd->writesize / 512; + eccbytes = ((bch * 13) + 7) / 8; + + /* Do not bother supporting small page devices */ + if (nsmtd->oobsize < 64 || !eccsteps) { + NS_ERR("BCH not available on small page devices\n"); + return -EINVAL; + } + + if (((eccbytes * eccsteps) + 2) > nsmtd->oobsize) { + NS_ERR("Invalid BCH value %u\n", bch); + return -EINVAL; + } + + chip->ecc.mode = NAND_ECC_SOFT; + chip->ecc.algo = NAND_ECC_BCH; + chip->ecc.size = 512; + chip->ecc.strength = bch; + chip->ecc.bytes = eccbytes; + + NS_INFO("Using %u-bit/%u bytes BCH ECC\n", bch, chip->ecc.size); + + return 0; +} + +static const struct nand_controller_ops ns_controller_ops = { + .attach_chip = ns_attach_chip, +}; + /* * Module initialization function */ @@ -2276,44 +2318,10 @@ static int __init ns_init_module(void) if ((retval = parse_gravepages()) != 0) goto error; - retval = nand_scan_ident(nsmtd, 1, NULL); + chip->dummy_controller.ops = &ns_controller_ops; + retval = nand_scan(nsmtd, 1); if (retval) { - NS_ERR("cannot scan NAND Simulator device\n"); - goto error; - } - - if (bch) { - unsigned int eccsteps, eccbytes; - if (!mtd_nand_has_bch()) { - NS_ERR("BCH ECC support is disabled\n"); - retval = -EINVAL; - goto error; - } - /* use 512-byte ecc blocks */ - eccsteps = nsmtd->writesize/512; - eccbytes = (bch*13+7)/8; - /* do not bother supporting small page devices */ - if ((nsmtd->oobsize < 64) || !eccsteps) { - NS_ERR("bch not available on small page devices\n"); - retval = -EINVAL; - goto error; - } - if ((eccbytes*eccsteps+2) > nsmtd->oobsize) { - NS_ERR("invalid bch value %u\n", bch); - retval = -EINVAL; - goto error; - } - chip->ecc.mode = NAND_ECC_SOFT; - chip->ecc.algo = NAND_ECC_BCH; - chip->ecc.size = 512; - chip->ecc.strength = bch; - chip->ecc.bytes = eccbytes; - NS_INFO("using %u-bit/%u bytes BCH ECC\n", bch, chip->ecc.size); - } - - retval = nand_scan_tail(nsmtd); - if (retval) { - NS_ERR("can't register NAND Simulator\n"); + NS_ERR("Could not scan NAND Simulator device\n"); goto error; } -- 2.14.1