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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51D55C77B7A for ; Tue, 6 Jun 2023 23:15:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240335AbjFFXP3 (ORCPT ); Tue, 6 Jun 2023 19:15:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240267AbjFFXOt (ORCPT ); Tue, 6 Jun 2023 19:14:49 -0400 Received: from mail-qk1-x72e.google.com (mail-qk1-x72e.google.com [IPv6:2607:f8b0:4864:20::72e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E4B61998 for ; Tue, 6 Jun 2023 16:14:48 -0700 (PDT) Received: by mail-qk1-x72e.google.com with SMTP id af79cd13be357-75d4b85b3ccso445665685a.2 for ; Tue, 06 Jun 2023 16:14:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1686093287; x=1688685287; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=nyPi1rPwS98XQwiWgY12WZBBaK5d1Swjzk87WsXmA6w=; b=PlDt06DFXzllU2CBA+uStg5g81PCA9DmFTbwBCqHiAyONJMaXSZXmGAVCFyfhlyrL9 gfsHvsVhfJ3t/CnALktbVJ+88jFSgDlW5bfQ+xxWC1pNdQj5GAw9OwLvVAWYZBBNFvmK 75r8cWtJRdmP08wqidiGU8UZ0oRx6mtBfQFpc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686093287; x=1688685287; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=nyPi1rPwS98XQwiWgY12WZBBaK5d1Swjzk87WsXmA6w=; b=K4ordKsBS9r6NQCBaDlUOaoqPtMhB1mHyKAOTQj7AR2v70VjlC/rcYLpRXX1jXmHZ7 ITKPr9tZXXQbwnANc20oPl98O8k8YU8IcXQk4ObSoTXb6X/B9X4s5JhExdkTq63KGSWz tJ4l7jafa5YhxeQ3UZSMvkJjDAdwCdsRsAP3py94dvi4bp5c3P6lIRAZYCd79+K5WEWu 9LqCVTZwhgu1K8wgRRC20RDhX3uLRdtZso3IXAOSwzSXx7rfeXqpRZIqo/G8zzGVED4U KaY/+gWy0sbyeUWJpFR8+IhwswVIORT/nZo8KqG3vcv+ZwODJOK+DOlTdfLZe0ZbBh9n 7nYg== X-Gm-Message-State: AC+VfDx83sox3EgyJUhBIc5JyOTj3cgWSQ8LTCoWrZ3Rx9KWhxuD9c2i BPVfDpOsrTQsYEy7DyQtMT8K2w== X-Google-Smtp-Source: ACHHUZ6ZFsQy5CRja97vDvyHczQ6NbfR6a9/XqHdgx5yN09JPHE4n+nhdH1OftBzrsfeOzW+ptjfHw== X-Received: by 2002:a05:620a:2541:b0:75b:23a1:3605 with SMTP id s1-20020a05620a254100b0075b23a13605mr221743qko.22.1686093287284; Tue, 06 Jun 2023 16:14:47 -0700 (PDT) Received: from ubuntu-22.localdomain ([192.19.222.250]) by smtp.gmail.com with ESMTPSA id x9-20020ae9e909000000b0075b23e55640sm5221519qkf.123.2023.06.06.16.14.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jun 2023 16:14:46 -0700 (PDT) From: William Zhang To: Broadcom Kernel List , Linux MTD List Cc: f.fainelli@gmail.com, rafal@milecki.pl, kursad.oney@broadcom.com, joel.peshkin@broadcom.com, computersforpeace@gmail.com, anand.gore@broadcom.com, dregan@mail.com, kamal.dasu@broadcom.com, tomer.yacoby@broadcom.com, dan.beygelman@broadcom.com, William Zhang , Miquel Raynal , linux-kernel@vger.kernel.org, Vignesh Raghavendra , Richard Weinberger , Kamal Dasu Subject: [PATCH 11/12] mtd: rawnand: brcmnand: Add support for getting ecc setting from strap Date: Tue, 6 Jun 2023 16:12:51 -0700 Message-Id: <20230606231252.94838-12-william.zhang@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230606231252.94838-1-william.zhang@broadcom.com> References: <20230606231252.94838-1-william.zhang@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000076d3dd05fd7e2f69" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --00000000000076d3dd05fd7e2f69 Content-Transfer-Encoding: 8bit BCMBCA broadband SoC based board design does not specify ecc setting in dts but rather use the SoC NAND strap info to obtain the ecc strength and spare area size setting. Add brcm,nand-ecc-use-strap dts propety for this purpose and update driver to support this option. The generic nand ecc settings still take precedence over this flag. For example, if nand-ecc-strength is set in the dts, the driver ignores the strap setting and falls back to original behavior. This makes sure that the existing BCMBCA board dts still works the old way even the strap flag is set in the BCMBCA chip dtsi. Signed-off-by: William Zhang --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 72 +++++++++++++++++++++--- 1 file changed, 64 insertions(+), 8 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 656be4d73016..8c7cea36ac71 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1076,6 +1076,38 @@ static void brcmnand_set_sector_size_1k(struct brcmnand_host *host, int val) nand_writereg(ctrl, acc_control_offs, tmp); } +static int brcmnand_get_spare_size(struct brcmnand_host *host) +{ + struct brcmnand_controller *ctrl = host->ctrl; + u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs, + BRCMNAND_CS_ACC_CONTROL); + u32 acc = nand_readreg(ctrl, acc_control_offs); + + return (acc&brcmnand_spare_area_mask(ctrl)); +} + +static int brcmnand_get_ecc_strength(struct brcmnand_host *host) +{ + struct brcmnand_controller *ctrl = host->ctrl; + u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs, + BRCMNAND_CS_ACC_CONTROL); + int sector_size_1k = brcmnand_get_sector_size_1k(host); + int spare_area_size, ecc_level, ecc_strength; + u32 acc; + + spare_area_size = brcmnand_get_spare_size(host); + acc = nand_readreg(ctrl, acc_control_offs); + ecc_level = (acc & brcmnand_ecc_level_mask(ctrl)) >> brcmnand_ecc_level_shift(ctrl); + if (sector_size_1k) + ecc_strength = ecc_level<<1; + else if (spare_area_size == 16 && ecc_level == 15) + ecc_strength = 1; /* hamming */ + else + ecc_strength = ecc_level; + + return ecc_strength; +} + /*********************************************************************** * CS_NAND_SELECT ***********************************************************************/ @@ -2656,19 +2688,43 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) nanddev_get_ecc_requirements(&chip->base); struct brcmnand_controller *ctrl = host->ctrl; struct brcmnand_cfg *cfg = &host->hwcfg; - char msg[128]; + struct device_node *np = nand_get_flash_node(chip); u32 offs, tmp, oob_sector; - int ret; + int ret, sector_size_1k = 0; + bool use_strap = false; + char msg[128]; memset(cfg, 0, sizeof(*cfg)); + use_strap = of_property_read_bool(np, "brcm,nand-ecc-use-strap"); + + /* + * Set ECC size and strength based on hw configuration from strap + * if device tree does not specify them and use strap property is set + * If ecc strength is set in dts, don't use strap setting. + */ + if (chip->ecc.strength) + use_strap = 0; + + if (use_strap) { + chip->ecc.strength = brcmnand_get_ecc_strength(host); + sector_size_1k = brcmnand_get_sector_size_1k(host); + if (chip->ecc.size == 0) { + if (sector_size_1k < 0) + chip->ecc.size = 512; + else + chip->ecc.size = 512<spare_area_size = mtd->oobsize / - (mtd->writesize >> FC_SHIFT); + if (use_strap) + cfg->spare_area_size = brcmnand_get_spare_size(host); + else + /* Use detected size */ + cfg->spare_area_size = mtd->oobsize / + (mtd->writesize >> FC_SHIFT); } else { 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