From patchwork Mon Jun 15 04:05:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Tomlinson X-Patchwork-Id: 214426 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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 88F43C433E0 for ; Mon, 15 Jun 2020 04:06:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62ABE20747 for ; Mon, 15 Jun 2020 04:06:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=alliedtelesis.co.nz header.i=@alliedtelesis.co.nz header.b="w+RKgGlS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728233AbgFOEGJ (ORCPT ); Mon, 15 Jun 2020 00:06:09 -0400 Received: from gate2.alliedtelesis.co.nz ([202.36.163.20]:50533 "EHLO gate2.alliedtelesis.co.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728201AbgFOEGH (ORCPT ); Mon, 15 Jun 2020 00:06:07 -0400 Received: from mmarshal3.atlnz.lc (mmarshal3.atlnz.lc [10.32.18.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by gate2.alliedtelesis.co.nz (Postfix) with ESMTPS id EDF1D891B2; Mon, 15 Jun 2020 16:05:57 +1200 (NZST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1592193957; bh=aYu5nfgaWwoNizinGEq9qqfsv0a+/kTso+vvT11d+U8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=w+RKgGlSdShLQkZZbeKBgGpX4s4d7ddCTiZTugf+0vXSgzIknKngcZcY2lHlrX0t+ 6lGXdJN7xTavUK1H8py0tS3etkNRF2c0M5H3tIAjE9/rxk1CfOYcek2B3Fr4/LODTv edqfFJA+IcOebXZaRgUDKe/nG4WUdxZVpKxBV37DV46G50hXdUSb+fVsCSlz0fA+NG okDamSd2VdcugN0MX42gjqoHovX9reoYFoHVydhaHJNoOA68gmlCGh5V5fh2iL9OKb a2kHatZvW9YxWtEnfkdQdzlyyW5rFUZT44I4bLSHsVr3MD3HMb93YTIsiJzQ60/WiA 5m3kYcRl3RdYQ== Received: from smtp (Not Verified[10.32.16.33]) by mmarshal3.atlnz.lc with Trustwave SEG (v7, 5, 8, 10121) id ; Mon, 15 Jun 2020 16:05:57 +1200 Received: from markto-dl.ws.atlnz.lc (markto-dl.ws.atlnz.lc [10.33.23.25]) by smtp (Postfix) with ESMTP id A189F13EEBA; Mon, 15 Jun 2020 16:05:56 +1200 (NZST) Received: by markto-dl.ws.atlnz.lc (Postfix, from userid 1155) id 54E84341107; Mon, 15 Jun 2020 16:05:57 +1200 (NZST) From: Mark Tomlinson To: broonie@kernel.org, kdasu.kdev@gmail.com Cc: linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, Mark Tomlinson Subject: [PATCH 3/5] spi: bcm-qspi: Do not split transfers into small chunks Date: Mon, 15 Jun 2020 16:05:55 +1200 Message-Id: <20200615040557.2011-4-mark.tomlinson@alliedtelesis.co.nz> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200615040557.2011-1-mark.tomlinson@alliedtelesis.co.nz> References: <20200615040557.2011-1-mark.tomlinson@alliedtelesis.co.nz> MIME-Version: 1.0 x-atlnz-ls: pat Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Instead of splitting transfers into smaller parts, just perform the operation that the higher level asked for. Reviewed-by: Callum Sinclair Reviewed-by: Chris Packham Signed-off-by: Mark Tomlinson --- drivers/spi/spi-bcm-qspi.c | 69 +++++++++++++++----------------------- 1 file changed, 27 insertions(+), 42 deletions(-) diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c index 92e04d24359f..ce30ebf27f06 100644 --- a/drivers/spi/spi-bcm-qspi.c +++ b/drivers/spi/spi-bcm-qspi.c @@ -78,8 +78,6 @@ #define BSPI_BPP_MODE_SELECT_MASK BIT(8) #define BSPI_BPP_ADDR_SELECT_MASK BIT(16) -#define BSPI_READ_LENGTH 256 - /* MSPI register offsets */ #define MSPI_SPCR0_LSB 0x000 #define MSPI_SPCR0_MSB 0x004 @@ -888,9 +886,9 @@ static int bcm_qspi_bspi_exec_mem_op(struct spi_device *spi, const struct spi_mem_op *op) { struct bcm_qspi *qspi = spi_master_get_devdata(spi->master); - u32 addr = 0, len, rdlen, len_words, from = 0; + u32 addr = 0, len, len_words, from = 0; int ret = 0; - unsigned long timeo = msecs_to_jiffies(100); + unsigned long timeo = msecs_to_jiffies(1500); struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc; if (bcm_qspi_bspi_ver_three(qspi)) @@ -925,47 +923,34 @@ static int bcm_qspi_bspi_exec_mem_op(struct spi_device *spi, * into RAF buffer read lengths */ len = op->data.nbytes; + reinit_completion(&qspi->bspi_done); + bcm_qspi_enable_bspi(qspi); + len_words = (len + 3) >> 2; + qspi->bspi_rf_op = op; + qspi->bspi_rf_op_status = 0; qspi->bspi_rf_op_idx = 0; + qspi->bspi_rf_op_len = len; + dev_dbg(&qspi->pdev->dev, "bspi xfr addr 0x%x len 0x%x", addr, len); - do { - if (len > BSPI_READ_LENGTH) - rdlen = BSPI_READ_LENGTH; - else - rdlen = len; - - reinit_completion(&qspi->bspi_done); - bcm_qspi_enable_bspi(qspi); - len_words = (rdlen + 3) >> 2; - qspi->bspi_rf_op = op; - qspi->bspi_rf_op_status = 0; - qspi->bspi_rf_op_len = rdlen; - dev_dbg(&qspi->pdev->dev, - "bspi xfr addr 0x%x len 0x%x", addr, rdlen); - bcm_qspi_write(qspi, BSPI, BSPI_RAF_START_ADDR, addr); - bcm_qspi_write(qspi, BSPI, BSPI_RAF_NUM_WORDS, len_words); - bcm_qspi_write(qspi, BSPI, BSPI_RAF_WATERMARK, 0); - if (qspi->soc_intc) { - /* - * clear soc MSPI and BSPI interrupts and enable - * BSPI interrupts. - */ - soc_intc->bcm_qspi_int_ack(soc_intc, MSPI_BSPI_DONE); - soc_intc->bcm_qspi_int_set(soc_intc, BSPI_DONE, true); - } - - /* Must flush previous writes before starting BSPI operation */ - mb(); - bcm_qspi_bspi_lr_start(qspi); - if (!wait_for_completion_timeout(&qspi->bspi_done, timeo)) { - dev_err(&qspi->pdev->dev, "timeout waiting for BSPI\n"); - ret = -ETIMEDOUT; - break; - } + bcm_qspi_write(qspi, BSPI, BSPI_RAF_START_ADDR, addr); + bcm_qspi_write(qspi, BSPI, BSPI_RAF_NUM_WORDS, len_words); + bcm_qspi_write(qspi, BSPI, BSPI_RAF_WATERMARK, 0); + if (qspi->soc_intc) { + /* + * clear soc MSPI and BSPI interrupts and enable + * BSPI interrupts. + */ + soc_intc->bcm_qspi_int_ack(soc_intc, MSPI_BSPI_DONE); + soc_intc->bcm_qspi_int_set(soc_intc, BSPI_DONE, true); + } - /* set msg return length */ - addr += rdlen; - len -= rdlen; - } while (len); + /* Must flush previous writes before starting BSPI operation */ + mb(); + bcm_qspi_bspi_lr_start(qspi); + if (!wait_for_completion_timeout(&qspi->bspi_done, timeo)) { + dev_err(&qspi->pdev->dev, "timeout waiting for BSPI\n"); + ret = -ETIMEDOUT; + } return ret; }