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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 64A10C4361B for ; Thu, 17 Dec 2020 05:30:50 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 0588D23434 for ; Thu, 17 Dec 2020 05:30:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0588D23434 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60656 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kplsF-0006gR-H6 for qemu-devel@archiver.kernel.org; Thu, 17 Dec 2020 00:30:47 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:50044) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kplqI-0005Zx-4s; Thu, 17 Dec 2020 00:28:46 -0500 Received: from mail-qt1-x835.google.com ([2607:f8b0:4864:20::835]:34809) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kplqG-0006Rg-28; Thu, 17 Dec 2020 00:28:45 -0500 Received: by mail-qt1-x835.google.com with SMTP id 7so19413594qtp.1; Wed, 16 Dec 2020 21:28:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=EXChrC5gkzfVYI7erB3OTiU4nPjdhy+eCp+7MHWO3+E=; b=bo6xk9EM3d78QcVmnt9i5Rj+CgadpEvCoWTiyaXv6IH443GpUrN9XDaACbRZjrBBJ2 6Cc9zF8fE4LGcTkZFpBJQiK3v4DNTQy85m6/1hj8rfWIUlldpMOvP8nnDu8yrkMZ5dEo +qq1dztVmXAbgvDNVDfSEtwb4QEKNboXx0Hopj5MRDJfodzhTCW3pDggLalxtcQ1ngG5 GGjCiajzTNF0NOuiQTxCuvnU2XVtLhsYqRMNsGocNgesOOT7k9AdsnAuUulfESGUWEJq 4Ke8z7m7dDn3Gui0gkXO3VaifDOBviJRdcFWHduomNlp22Pq2UZNme96ezjhrRfmHUyF /Mgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=EXChrC5gkzfVYI7erB3OTiU4nPjdhy+eCp+7MHWO3+E=; b=DxIkoGAPedANlnXd7kjJl86qObRtsKgPGerh4r/IH/UbzVbwVdt5cuednMzxFiE5pE KLGH/eIujBm35PmrKxfmtHHyTejfTfYNY3hxB2pFlnXzIAwPbUQ7vntOH84G7pZEksUT Ttg4FJ5PN3R/i89TDO+Okw5V3juxGha/oN1W5XYBhslCZ5YBOS+7x66lCQZMI6IRVTqr GVnAiIllEffaKdjSuQ1s8U37gtGZHD+KNTOHI+inm63KJOhiSO9ae73GIrWWIACRKlvI kvcJsrEc5GND5+aHtDOe1WJU3X9Gqb9TX44jEMnGFsRucXyfBt436SA/tbyVU4G/Xgt5 Jdzw== X-Gm-Message-State: AOAM533/suwJZjTnIzLYeZVs6ZSK7XvlbTe5i9RlQi3qDwdPl9HfhXkO Cc4fnacX5RlAOSrK1rtDBPo= X-Google-Smtp-Source: ABdhPJwS4TwN5Rxz004PAEBXm2iEO6g4Sl8MlONkZQrCI0bwk1kG8LAUrhwKWjouvJKKQEji+M4M4w== X-Received: by 2002:ac8:5441:: with SMTP id d1mr2660193qtq.384.1608182922215; Wed, 16 Dec 2020 21:28:42 -0800 (PST) Received: from pek-vx-bsp2.wrs.com (unknown-124-94.windriver.com. [147.11.124.94]) by smtp.gmail.com with ESMTPSA id i13sm2674072qkk.83.2020.12.16.21.28.39 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 16 Dec 2020 21:28:41 -0800 (PST) From: Bin Meng To: Peter Maydell , Jean-Christophe Dubois , Alistair Francis , qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH 1/2] hw/ssi: imx_spi: Correct the burst length > 32 bit transfer logic Date: Thu, 17 Dec 2020 13:28:32 +0800 Message-Id: <1608182913-54603-1-git-send-email-bmeng.cn@gmail.com> X-Mailer: git-send-email 2.7.4 Received-SPF: pass client-ip=2607:f8b0:4864:20::835; envelope-from=bmeng.cn@gmail.com; helo=mail-qt1-x835.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bin Meng Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Bin Meng For the ECSPIx_CONREG register BURST_LENGTH field, the manual says: 0x020 A SPI burst contains the 1 LSB in first word and all 32 bits in second word. 0x021 A SPI burst contains the 2 LSB in first word and all 32 bits in second word. Current logic uses either s->burst_length or 32, whichever smaller, to determine how many bits it should read from the tx fifo each time. For example, for a 48 bit burst length, current logic transfers the first 32 bit from the first word in the tx fifo, followed by a 16 bit from the second word in the tx fifo, which is wrong. The correct logic should be: transfer the first 16 bit from the first word in the tx fifo, followed by a 32 bit from the second word in the tx fifo. With this change, SPI flash can be successfully probed by U-Boot on imx6 sabrelite board. => sf probe SF: Detected sst25vf016b with page size 256 Bytes, erase size 4 KiB, total 2 MiB Fixes: c906a3a01582 ("i.MX: Add the Freescale SPI Controller") Signed-off-by: Bin Meng --- hw/ssi/imx_spi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/ssi/imx_spi.c b/hw/ssi/imx_spi.c index 85c172e..509fb9f 100644 --- a/hw/ssi/imx_spi.c +++ b/hw/ssi/imx_spi.c @@ -178,7 +178,10 @@ static void imx_spi_flush_txfifo(IMXSPIState *s) DPRINTF("data tx:0x%08x\n", tx); - tx_burst = MIN(s->burst_length, 32); + tx_burst = s->burst_length % 32; + if (tx_burst == 0) { + tx_burst = 32; + } rx = 0; -- 2.7.4