From patchwork Mon Nov 1 23:23:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hao Wu X-Patchwork-Id: 1549395 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20210112 header.b=F/odgL06; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4Hjq0k6YxFz9s5P for ; Tue, 2 Nov 2021 10:26:14 +1100 (AEDT) Received: from localhost ([::1]:59134 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mhggu-0002b6-Nd for incoming@patchwork.ozlabs.org; Mon, 01 Nov 2021 19:26:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41552) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <3D3eAYQgKChIECzs6BAzy66y3w.u648w4C-vwDw3565y5C.69y@flex--wuhaotsh.bounces.google.com>) id 1mhgeo-0001jt-Ou for qemu-devel@nongnu.org; Mon, 01 Nov 2021 19:24:02 -0400 Received: from mail-pl1-x64a.google.com ([2607:f8b0:4864:20::64a]:51830) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from <3D3eAYQgKChIECzs6BAzy66y3w.u648w4C-vwDw3565y5C.69y@flex--wuhaotsh.bounces.google.com>) id 1mhgen-0002vT-Cy for qemu-devel@nongnu.org; Mon, 01 Nov 2021 19:24:02 -0400 Received: by mail-pl1-x64a.google.com with SMTP id g20-20020a170902869400b0014002b0f5bcso6674950plo.18 for ; Mon, 01 Nov 2021 16:24:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=pXfgJHvome9hq7DD3kgavdSisX+d0Zxf80aI+vn8Zlk=; b=F/odgL06mHj9hb0bXbwtWGyI4vGh0hGbE7wVh8tg5zZPV1yWzhOhTzaJCs97hF7+cs gB28R6tuzrb9SnodIP3h8BShJ+FMH8xpNJNaMG2SjBTsYjJMFCHE2Z3Pq2Lf16Mo4xFB 9A3q5HxuFwDb+0kZ3mrn/VzV93rhOwxlKsaF0UHmuFXqqoxvHgsbERdm+0ozpfj3IMdS Xgp/X1PFNlDAol8cA9RfrpwuX6eTkVZPLNzi/j2+PZ/BawxOil4iDWbbi36uFwxDutV1 4I83N6mEt0/UlwGd60wRZmIFqQvVSIh4JD5fk65C12G7izVzvTO0ZCOTk5V3+uuOSbMb ZctQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=pXfgJHvome9hq7DD3kgavdSisX+d0Zxf80aI+vn8Zlk=; b=dkj+0SI6gYYh5IF2FydVC3ODffGsff9pWNnaenLnbYflVL65ppmPeCQPJkmDXo1OHp +mTpZGuGilZ2A8D8f3qJjZ6AzDJVLQpAtE1AEoYxe3z9fZXdovup6N3fUlL49HfEbnFN 63EC8PCyql32feVXCe3bZZfHbTvgIIEYAynuPHfFJOF84dlmahFcDt1fmRvk5lKqOb90 IEXhWIU51+QzlLorrjfwFs9H2f3KSvuI6K6/LBlhjB9AMx2Lv6+xuZW8cex2Q8dVMmfP lpTEwko/4yUo5SlVMUr7gb7KWaVpDwQcPedq0b8B+qxFEoqqih694gpQyx25fUElV5ZZ yuRw== X-Gm-Message-State: AOAM531FTyudjB/XYavcY1poNkGyIOnZjuJkoAdNbpQ+le7LbLt6DYj0 tn3VXJwgTiKD0n8P1oSCQ6CV4eErJgQJ0A== X-Google-Smtp-Source: ABdhPJw0FKrfqjt+ebZNa7yRazo5cpYYlQ9KbCZV78nQz++Mi5usA4T4XYJoUgHieZPLbe0X8/qRIoxeVcyCzQ== X-Received: from mimik.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:4e]) (user=wuhaotsh job=sendgmr) by 2002:a17:90a:d317:: with SMTP id p23mr2266383pju.196.1635809039239; Mon, 01 Nov 2021 16:23:59 -0700 (PDT) Date: Mon, 1 Nov 2021 16:23:42 -0700 In-Reply-To: <20211101232346.1070813-1-wuhaotsh@google.com> Message-Id: <20211101232346.1070813-3-wuhaotsh@google.com> Mime-Version: 1.0 References: <20211101232346.1070813-1-wuhaotsh@google.com> X-Mailer: git-send-email 2.33.1.1089.g2158813163f-goog Subject: [PATCH v3 2/6] hw/i2c: Read FIFO during RXF_CTL change in NPCM7XX SMBus From: Hao Wu To: peter.maydell@linaro.org Cc: qemu-arm@nongnu.org, qemu-devel@nongnu.org, wuhaotsh@google.com, venture@google.com, Avi.Fishman@nuvoton.com, kfting@nuvoton.com, hskinnemoen@google.com, Titus Rwantare , Corey Minyard Received-SPF: pass client-ip=2607:f8b0:4864:20::64a; envelope-from=3D3eAYQgKChIECzs6BAzy66y3w.u648w4C-vwDw3565y5C.69y@flex--wuhaotsh.bounces.google.com; helo=mail-pl1-x64a.google.com X-Spam_score_int: -95 X-Spam_score: -9.6 X-Spam_bar: --------- X-Spam_report: (-9.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Originally we read in from SMBus when RXF_STS is cleared. However, the driver clears RXF_STS before setting RXF_CTL, causing the SM bus module to read incorrect amount of bytes in FIFO mode when the number of bytes read changed. This patch fixes this issue. Signed-off-by: Hao Wu Reviewed-by: Titus Rwantare Acked-by: Corey Minyard --- hw/i2c/npcm7xx_smbus.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/hw/i2c/npcm7xx_smbus.c b/hw/i2c/npcm7xx_smbus.c index f18e311556..1435daea94 100644 --- a/hw/i2c/npcm7xx_smbus.c +++ b/hw/i2c/npcm7xx_smbus.c @@ -637,9 +637,6 @@ static void npcm7xx_smbus_write_rxf_sts(NPCM7xxSMBusState *s, uint8_t value) { if (value & NPCM7XX_SMBRXF_STS_RX_THST) { s->rxf_sts &= ~NPCM7XX_SMBRXF_STS_RX_THST; - if (s->status == NPCM7XX_SMBUS_STATUS_RECEIVING) { - npcm7xx_smbus_recv_fifo(s); - } } } @@ -651,6 +648,9 @@ static void npcm7xx_smbus_write_rxf_ctl(NPCM7xxSMBusState *s, uint8_t value) new_ctl = KEEP_OLD_BIT(s->rxf_ctl, new_ctl, NPCM7XX_SMBRXF_CTL_LAST); } s->rxf_ctl = new_ctl; + if (s->status == NPCM7XX_SMBUS_STATUS_RECEIVING) { + npcm7xx_smbus_recv_fifo(s); + } } static uint64_t npcm7xx_smbus_read(void *opaque, hwaddr offset, unsigned size)