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=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,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 65BF5C432BE for ; Thu, 26 Aug 2021 10:32:37 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 24DAB61058 for ; Thu, 26 Aug 2021 10:32:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 24DAB61058 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=ffd/rDlrmi7+HSX6Yuku0hrcsRDLQfJrj6eir1jER5g=; b=aYhynZXpZ5YyxC mccOCf2u41bxSToW8T8pXKLgZgw+IxxezKQocjBoHG5Tt/bENs3V3qzBi4jqrg2qr2L38eOotItlB /tjoPIC5oay5u374de9hfy7NZpiqYXrM5sLFE/RS36kCwHjPeqez6A82mrln1dUCv24kklEaM+0QV fGdxPxiE01NMtRLGNEUZusOXkVB0JbCSjOM82lBHXVX288ZfdAGJVsVM8dttmpVJ186dwwRo98Oov rkJ73UDWLHT4U8QttHPq0VEvYi7mb7FmZZ7rYOja+MSnlKsIP2o8hmBekwfDXFTZejKGxwQDdvMQg WammB8tJigJxBRPIsalA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mJCfZ-009oTf-UV; Thu, 26 Aug 2021 10:31:37 +0000 Received: from alexa-out.qualcomm.com ([129.46.98.28]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mJCfU-009oTJ-FB for linux-mtd@lists.infradead.org; Thu, 26 Aug 2021 10:31:33 +0000 Received: from ironmsg07-lv.qualcomm.com ([10.47.202.151]) by alexa-out.qualcomm.com with ESMTP; 26 Aug 2021 03:31:28 -0700 X-QCInternal: smtphost Received: from ironmsg01-blr.qualcomm.com ([10.86.208.130]) by ironmsg07-lv.qualcomm.com with ESMTP/TLS/AES256-SHA; 26 Aug 2021 03:31:27 -0700 X-QCInternal: smtphost Received: from mdalam-linux.qualcomm.com ([10.201.2.71]) by ironmsg01-blr.qualcomm.com with ESMTP; 26 Aug 2021 16:01:10 +0530 Received: by mdalam-linux.qualcomm.com (Postfix, from userid 466583) id 5155B22319; Thu, 26 Aug 2021 16:01:09 +0530 (IST) From: Md Sadre Alam To: miquel.raynal@bootlin.com, mani@kernel.org, boris.brezillon@collabora.com, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Cc: mdalam@codeaurora.org, sricharan@codeaurora.org Subject: [PATCH] mtd: rawnand: qcom: Update code word value for raw read Date: Thu, 26 Aug 2021 16:01:02 +0530 Message-Id: <1629973862-7248-1-git-send-email-mdalam@codeaurora.org> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210826_033132_610890_8C620365 X-CRM114-Status: GOOD ( 10.83 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org >From QPIC V2 onwards there is a separate register to read last code word "QPIC_NAND_READ_LOCATION_LAST_CW_n". qcom_nandc_read_cw_raw() is used to read only one code word at a time. If we will configure number of code words to 1 in in QPIC_NAND_DEV0_CFG0 register then QPIC controller thinks its reading the last code word, since from QPIC V2 onwards we are having separate register to read the last code word, we have to configure "QPIC_NAND_READ_LOCATION_LAST_CW_n" register to fetch data from controller buffer to system memory. Signed-off-by: Md Sadre Alam --- drivers/mtd/nand/raw/qcom_nandc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c index ef0bade..04e6f7b 100644 --- a/drivers/mtd/nand/raw/qcom_nandc.c +++ b/drivers/mtd/nand/raw/qcom_nandc.c @@ -1676,13 +1676,17 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip, struct nand_ecc_ctrl *ecc = &chip->ecc; int data_size1, data_size2, oob_size1, oob_size2; int ret, reg_off = FLASH_BUF_ACC, read_loc = 0; + int raw_cw = cw; nand_read_page_op(chip, page, 0, NULL, 0); host->use_ecc = false; + if (nandc->props->qpic_v2) + raw_cw = ecc->steps - 1; + clear_bam_transaction(nandc); set_address(host, host->cw_size * cw, page); - update_rw_regs(host, 1, true, cw); + update_rw_regs(host, 1, true, raw_cw); config_nand_page_read(chip); data_size1 = mtd->writesize - host->cw_size * (ecc->steps - 1); @@ -1711,7 +1715,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip, nandc_set_read_loc(chip, cw, 3, read_loc, oob_size2, 1); } - config_nand_cw_read(chip, false, cw); + config_nand_cw_read(chip, false, raw_cw); read_data_dma(nandc, reg_off, data_buf, data_size1, 0); reg_off += data_size1; -- 2.7.4 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/