From patchwork Thu Jan 23 10:31:15 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Jones X-Patchwork-Id: 313581 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:770:15f::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 2B4942C009B for ; Thu, 23 Jan 2014 23:19:42 +1100 (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 1W6HeT-00085F-Vu; Thu, 23 Jan 2014 10:36:50 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1W6He6-0003Vc-MW; Thu, 23 Jan 2014 10:36:26 +0000 Received: from mail-wg0-f54.google.com ([74.125.82.54]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W6Hax-00037O-Ll for linux-mtd@lists.infradead.org; Thu, 23 Jan 2014 10:33:12 +0000 Received: by mail-wg0-f54.google.com with SMTP id x13so1248205wgg.33 for ; Thu, 23 Jan 2014 02:32:50 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=d/m/OY+7NTkakWf87JUgT+bdNofodMGmkPXG/GZDuIo=; b=ilKRBXUezVARwOPggSsipAxqiJ+vnn9qKUNnS3juAPMdSdAo4OFFttrGR/JpdvOyCZ jTWr0qQSC2sCuX/T8tGBAdL1aWyDW6CI0LHjDBWfycPYUbQcEDRpOD6EqtW64tGuh8TK F30FGJTWDCfNR7BIXnb22bQJszyNrXzOMmlNDIo6kzqqqIeSNsHsWj57tHyYtibnv1jC JytEzAFj+19kRpjaBESBWaNwEfF4yYNh1+igFxWTWSNb/9s+SlB56oERtjRbhQzExbA1 IYaZvMSAGDXcy8jcvNLZvkh23CxzUn6sS16ePStJn85V7oG44X1BUbQcwNlrn5xyL5xe AbbQ== X-Gm-Message-State: ALoCoQmDxJRpEsPdpM4LmHVAZvr2qEzOt4CnZ2khBL6sX21xfnZTexpSnqds7ohjN0n5iB1PVQcF X-Received: by 10.180.21.166 with SMTP id w6mr23641488wie.31.1390473170075; Thu, 23 Jan 2014 02:32:50 -0800 (PST) Received: from localhost.localdomain ([80.76.198.141]) by mx.google.com with ESMTPSA id ay6sm21257831wjb.23.2014.01.23.02.32.47 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 23 Jan 2014 02:32:49 -0800 (PST) From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH RESEND v4 27/37] mtd: st_spi_fsm: Write to Flash via the FSM FIFO Date: Thu, 23 Jan 2014 10:31:15 +0000 Message-Id: <1390473085-24626-28-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1390473085-24626-1-git-send-email-lee.jones@linaro.org> References: <1390473085-24626-1-git-send-email-lee.jones@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140123_053311_869444_497CA977 X-CRM114-Status: GOOD ( 11.49 ) X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [74.125.82.54 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: olivier.clergeaud@st.com, Angus.Clark@st.com, Lee Jones , linus.walleij@linaro.org, linux-mtd@lists.infradead.org, computersforpeace@gmail.com, dwmw2@infradead.org, DCG_UPD_stlinux_kernel@list.st.com 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 When we write data to the FIFO the FSM Controller subsequently writes that data out to the Serial Flash chip. Signed-off-by: Lee Jones --- drivers/mtd/devices/st_spi_fsm.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index b43fed1..c64f741 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -661,6 +661,20 @@ static void stfsm_read_fifo(struct stfsm *fsm, uint32_t *buf, } } +static int stfsm_write_fifo(struct stfsm *fsm, + const uint32_t *buf, const uint32_t size) +{ + uint32_t words = size >> 2; + + dev_dbg(fsm->dev, "writing %d bytes to FIFO\n", size); + + BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3)); + + writesl(fsm->base + SPI_FAST_SEQ_DATA_REG, buf, words); + + return size; +} + static int stfsm_enter_32bit_addr(struct stfsm *fsm, int enter) { struct stfsm_seq *seq = &stfsm_seq_en_32bit_addr;