From patchwork Thu Nov 7 15:17:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ezequiel Garcia X-Patchwork-Id: 3153521 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A7CD09F3C4 for ; Thu, 7 Nov 2013 15:58:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 859D720452 for ; Thu, 7 Nov 2013 15:58:38 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3F6CC2039D for ; Thu, 7 Nov 2013 15:58:37 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VeRRL-00007B-77; Thu, 07 Nov 2013 15:24:13 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VeRQZ-0002L0-FJ; Thu, 07 Nov 2013 15:23:23 +0000 Received: from top.free-electrons.com ([176.31.233.9] helo=mail.free-electrons.com) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VeROs-00026a-IM; Thu, 07 Nov 2013 15:21:40 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 2AF4697D; Thu, 7 Nov 2013 16:21:31 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost.localdomain (unknown [190.2.98.212]) by mail.free-electrons.com (Postfix) with ESMTPA id 34B1B965; Thu, 7 Nov 2013 16:19:26 +0100 (CET) From: Ezequiel Garcia To: , , Subject: [PATCH v4 23/31] mtd: nand: pxa3xx: Move the data buffer clean to prepare_start_command() Date: Thu, 7 Nov 2013 12:17:27 -0300 Message-Id: <1383837455-30721-24-git-send-email-ezequiel.garcia@free-electrons.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1383837455-30721-1-git-send-email-ezequiel.garcia@free-electrons.com> References: <1383837455-30721-1-git-send-email-ezequiel.garcia@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131107_102138_760181_8496ADE6 X-CRM114-Status: GOOD ( 11.38 ) X-Spam-Score: -1.2 (-) Cc: Lior Amsalem , Thomas Petazzoni , Jason Cooper , Tawfik Bayouk , Daniel Mack , Huang Shijie , Ezequiel Garcia , Gregory Clement , Brian Norris , Willy Tarreau X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP To allow future support of multiple page reading/writing, move the data buffer clean out of prepare_set_command(). This is done to prevent the data buffer from being cleaned on every command preparation, when a multiple command sequence is implemented to read/write pages larger than the FIFO size (2 KiB). Signed-off-by: Ezequiel Garcia --- drivers/mtd/nand/pxa3xx_nand.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index d3f3959..5f874a6 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -609,6 +609,9 @@ static void set_command_address(struct pxa3xx_nand_info *info, static void prepare_start_command(struct pxa3xx_nand_info *info, int command) { + struct pxa3xx_nand_host *host = info->host[info->cs]; + struct mtd_info *mtd = host->mtd; + /* reset data and oob column point to handle data */ info->buf_start = 0; info->buf_count = 0; @@ -633,6 +636,19 @@ static void prepare_start_command(struct pxa3xx_nand_info *info, int command) info->ndcb2 = 0; break; } + + /* + * If we are about to isse a read command, or about to set + * the write address, then clean the data buffer. + */ + if (command == NAND_CMD_READ0 || + command == NAND_CMD_READOOB || + command == NAND_CMD_SEQIN) { + + info->buf_count = mtd->writesize + mtd->oobsize; + memset(info->data_buff, 0xFF, info->buf_count); + } + } static int prepare_set_command(struct pxa3xx_nand_info *info, int command, @@ -674,16 +690,11 @@ static int prepare_set_command(struct pxa3xx_nand_info *info, int command, info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8); set_command_address(info, mtd->writesize, column, page_addr); - info->buf_count = mtd->writesize + mtd->oobsize; - memset(info->data_buff, 0xFF, info->buf_count); break; case NAND_CMD_SEQIN: set_command_address(info, mtd->writesize, column, page_addr); - info->buf_count = mtd->writesize + mtd->oobsize; - memset(info->data_buff, 0xFF, info->buf_count); - break; case NAND_CMD_PAGEPROG: