From patchwork Wed Aug 7 12:31:09 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ezequiel Garcia X-Patchwork-Id: 265492 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from casper.infradead.org (unknown [IPv6:2001:770:15f::2]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id F27422C0129 for ; Wed, 7 Aug 2013 22:33:13 +1000 (EST) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1V72ud-0007pc-U4; Wed, 07 Aug 2013 12:32:24 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1V72uT-0006q8-OF; Wed, 07 Aug 2013 12:32:13 +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 1V72uN-0006ls-Eh for linux-mtd@lists.infradead.org; Wed, 07 Aug 2013 12:32:08 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 251F76E7E; Wed, 7 Aug 2013 14:31:58 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.3.2 Received: from localhost.localdomain (unknown [190.2.109.158]) by mail.free-electrons.com (Postfix) with ESMTPA id 921516E78; Wed, 7 Aug 2013 14:31:54 +0200 (CEST) From: Ezequiel Garcia To: Subject: [PATCH v2 04/14] mtd: nand: pxa3xx: Support command buffer #3 Date: Wed, 7 Aug 2013 09:31:09 -0300 Message-Id: <1375878679-18098-5-git-send-email-ezequiel.garcia@free-electrons.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1375878679-18098-1-git-send-email-ezequiel.garcia@free-electrons.com> References: <1375878679-18098-1-git-send-email-ezequiel.garcia@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130807_083207_657711_B199E8A8 X-CRM114-Status: UNSURE ( 9.86 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.5 (/) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (0.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- 1.7 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list 0.7 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Lior Amsalem , Thomas Petazzoni , Jason Cooper , Artem Bityutskiy , Daniel Mack , Ezequiel Garcia , Gregory Clement , Brian Norris , David Woodhouse , Willy Tarreau X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Some newer controllers support a fourth command buffer. This additional command buffer allows to set an arbitrary length count, using the NDCB3.NDLENCNT field, to perform non-standard length operations such as the ONFI parameter page read. In controllers without this register, the operation has no effect. Signed-off-by: Ezequiel Garcia --- drivers/mtd/nand/pxa3xx_nand.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index a277def..65e3ee9 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -197,6 +197,7 @@ struct pxa3xx_nand_info { uint32_t ndcb0; uint32_t ndcb1; uint32_t ndcb2; + uint32_t ndcb3; }; static bool use_dma = 1; @@ -496,6 +497,10 @@ static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) nand_writel(info, NDCB0, info->ndcb0); nand_writel(info, NDCB0, info->ndcb1); nand_writel(info, NDCB0, info->ndcb2); + + /* NDCB3 register is available in NFCv2 (Armada 370/XP SoC) */ + if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370) + nand_writel(info, NDCB0, info->ndcb3); } /* clear NDSR to let the controller exit the IRQ */ @@ -554,6 +559,7 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, default: info->ndcb1 = 0; info->ndcb2 = 0; + info->ndcb3 = 0; break; }