From patchwork Mon Aug 17 15:12:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 247860 Delivered-To: patch@linaro.org Received: by 2002:a92:cc90:0:0:0:0:0 with SMTP id x16csp2889267ilo; Mon, 17 Aug 2020 12:05:55 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyFJpj5qLXZoCNBEuialWqnij3AlU9J1JrnzZk+iiZalIGBeCQru5IDbSjfg5fVZpLTBeSP X-Received: by 2002:a05:6402:1443:: with SMTP id d3mr16982745edx.40.1597691155570; Mon, 17 Aug 2020 12:05:55 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1597691155; cv=none; d=google.com; s=arc-20160816; b=RN7pEBwIZVCe79MoAMSvaOYmvTKbVgN41XL06UFZl0/3F5IJhx96Eixof0t0mzCoaR gP4hvRqfB5tyJmVPfwrNPVxy+xxL2WZ0HDAbbOgDIWGZ3OCGVc2Y4z/AJuW1e39RFgXR 2wHNGxAMypvGj+7DxBOdyDdYX852skStAn4O4QIBAQ/Ng7C5v5EL9d2SrqLIC+Zz/83z pqBsOnYe2j3f/Dm+qzb/9ayWMDGJylDQYYYPLBGp5fBSWkCR6yPLk979P6Iv6rEfmcZ8 ZITJaaynKNYe8MelxjQ4ScfdYB/qp7imDLMFQ2rHPyiTEv4QMyyFpmliLzquo605JalN Pusw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :user-agent:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=26VOpNUd8RM/jpzGP1Q6OZUTMblTshksPE8XpKvD4SI=; b=Um9SrV8iI1tPIQSMuzQYnITrOFYhjLjgMbqzX8uyT6kO4VpST5Tn2aiqVj2MCp/WEH p7hYe/MXsFCZufnrLquDjKMcA+4cr21tzHcyHUPY0ppTv9tqxT6CO8D+fuBdK51llSwX QErxQyYR+jqrImOqTEk1+xSxA7VeU/StLLuZEi848HwOzLY/KHWkzvtxSms5DYa8AZhe UQ7zcF+VsA+PrmNeDHLuD98NfpWbvXtQq026jliMROgx/OMtH9cqrXrh9o+ngbV5D6T9 dlJ4FHAHekUG6cUQzxmM3AL07cD1bB7IsqdlwHl9cVidiT4bv9GAz8KFAvI2oCooCwxB qQuA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=Y+pb6tZX; spf=pass (google.com: domain of stable-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id n12si11476524eji.301.2020.08.17.12.05.55; Mon, 17 Aug 2020 12:05:55 -0700 (PDT) Received-SPF: pass (google.com: domain of stable-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=Y+pb6tZX; spf=pass (google.com: domain of stable-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387699AbgHQPol (ORCPT + 15 others); Mon, 17 Aug 2020 11:44:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:55262 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730488AbgHQPoa (ORCPT ); Mon, 17 Aug 2020 11:44:30 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 010F122CAE; Mon, 17 Aug 2020 15:44:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597679069; bh=hbh2onNfrYZWgzJOpBJ8qUnoyWuTiPcRne0L8EkdyiI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y+pb6tZXeCxFDo9XrBbvq0yrING26XE6+ABZUsCIvtwxTPq7JwYHI2gHlG8ch2ItD DR2YlfVRR85F/Ru1oXiUX9iQpBwPZhuiq4zCzL6tD+I5g2EZW9UKfajXEycudU17Iy rCBhRxbOeAF8lJy0KVeEquWbb9Mc4v3kRa0ffYSs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Masahiro Yamada , Ulf Hansson , Sasha Levin Subject: [PATCH 5.7 084/393] mmc: sdhci-cadence: do not use hardware tuning for SD mode Date: Mon, 17 Aug 2020 17:12:14 +0200 Message-Id: <20200817143823.704932164@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143819.579311991@linuxfoundation.org> References: <20200817143819.579311991@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Masahiro Yamada [ Upstream commit adc40a5179df30421a5537bfeb4545100ab97d5e ] As commit ef6b75671b5f ("mmc: sdhci-cadence: send tune request twice to work around errata") stated, this IP has an errata. This commit applies the second workaround for the SD mode. Due to the errata, it is not possible to use the hardware tuning provided by SDHCI_HOST_CONTROL2. Use the software-controlled tuning like the eMMC mode. Set sdhci_host_ops::platform_execute_tuning instead of overriding mmc_host_ops::execute_tuning. Signed-off-by: Masahiro Yamada Link: https://lore.kernel.org/r/20200720061141.172944-1-yamada.masahiro@socionext.com Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin --- drivers/mmc/host/sdhci-cadence.c | 123 ++++++++++++++++--------------- 1 file changed, 62 insertions(+), 61 deletions(-) -- 2.25.1 diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c index 6da6d4fb5edd7..07a4cb989a68a 100644 --- a/drivers/mmc/host/sdhci-cadence.c +++ b/drivers/mmc/host/sdhci-cadence.c @@ -194,57 +194,6 @@ static u32 sdhci_cdns_get_emmc_mode(struct sdhci_cdns_priv *priv) return FIELD_GET(SDHCI_CDNS_HRS06_MODE, tmp); } -static void sdhci_cdns_set_uhs_signaling(struct sdhci_host *host, - unsigned int timing) -{ - struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); - u32 mode; - - switch (timing) { - case MMC_TIMING_MMC_HS: - mode = SDHCI_CDNS_HRS06_MODE_MMC_SDR; - break; - case MMC_TIMING_MMC_DDR52: - mode = SDHCI_CDNS_HRS06_MODE_MMC_DDR; - break; - case MMC_TIMING_MMC_HS200: - mode = SDHCI_CDNS_HRS06_MODE_MMC_HS200; - break; - case MMC_TIMING_MMC_HS400: - if (priv->enhanced_strobe) - mode = SDHCI_CDNS_HRS06_MODE_MMC_HS400ES; - else - mode = SDHCI_CDNS_HRS06_MODE_MMC_HS400; - break; - default: - mode = SDHCI_CDNS_HRS06_MODE_SD; - break; - } - - sdhci_cdns_set_emmc_mode(priv, mode); - - /* For SD, fall back to the default handler */ - if (mode == SDHCI_CDNS_HRS06_MODE_SD) - sdhci_set_uhs_signaling(host, timing); -} - -static const struct sdhci_ops sdhci_cdns_ops = { - .set_clock = sdhci_set_clock, - .get_timeout_clock = sdhci_cdns_get_timeout_clock, - .set_bus_width = sdhci_set_bus_width, - .reset = sdhci_reset, - .set_uhs_signaling = sdhci_cdns_set_uhs_signaling, -}; - -static const struct sdhci_pltfm_data sdhci_cdns_uniphier_pltfm_data = { - .ops = &sdhci_cdns_ops, - .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, -}; - -static const struct sdhci_pltfm_data sdhci_cdns_pltfm_data = { - .ops = &sdhci_cdns_ops, -}; - static int sdhci_cdns_set_tune_val(struct sdhci_host *host, unsigned int val) { struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); @@ -278,23 +227,24 @@ static int sdhci_cdns_set_tune_val(struct sdhci_host *host, unsigned int val) return 0; } -static int sdhci_cdns_execute_tuning(struct mmc_host *mmc, u32 opcode) +/* + * In SD mode, software must not use the hardware tuning and instead perform + * an almost identical procedure to eMMC. + */ +static int sdhci_cdns_execute_tuning(struct sdhci_host *host, u32 opcode) { - struct sdhci_host *host = mmc_priv(mmc); int cur_streak = 0; int max_streak = 0; int end_of_streak = 0; int i; /* - * This handler only implements the eMMC tuning that is specific to - * this controller. Fall back to the standard method for SD timing. + * Do not execute tuning for UHS_SDR50 or UHS_DDR50. + * The delay is set by probe, based on the DT properties. */ - if (host->timing != MMC_TIMING_MMC_HS200) - return sdhci_execute_tuning(mmc, opcode); - - if (WARN_ON(opcode != MMC_SEND_TUNING_BLOCK_HS200)) - return -EINVAL; + if (host->timing != MMC_TIMING_MMC_HS200 && + host->timing != MMC_TIMING_UHS_SDR104) + return 0; for (i = 0; i < SDHCI_CDNS_MAX_TUNING_LOOP; i++) { if (sdhci_cdns_set_tune_val(host, i) || @@ -317,6 +267,58 @@ static int sdhci_cdns_execute_tuning(struct mmc_host *mmc, u32 opcode) return sdhci_cdns_set_tune_val(host, end_of_streak - max_streak / 2); } +static void sdhci_cdns_set_uhs_signaling(struct sdhci_host *host, + unsigned int timing) +{ + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); + u32 mode; + + switch (timing) { + case MMC_TIMING_MMC_HS: + mode = SDHCI_CDNS_HRS06_MODE_MMC_SDR; + break; + case MMC_TIMING_MMC_DDR52: + mode = SDHCI_CDNS_HRS06_MODE_MMC_DDR; + break; + case MMC_TIMING_MMC_HS200: + mode = SDHCI_CDNS_HRS06_MODE_MMC_HS200; + break; + case MMC_TIMING_MMC_HS400: + if (priv->enhanced_strobe) + mode = SDHCI_CDNS_HRS06_MODE_MMC_HS400ES; + else + mode = SDHCI_CDNS_HRS06_MODE_MMC_HS400; + break; + default: + mode = SDHCI_CDNS_HRS06_MODE_SD; + break; + } + + sdhci_cdns_set_emmc_mode(priv, mode); + + /* For SD, fall back to the default handler */ + if (mode == SDHCI_CDNS_HRS06_MODE_SD) + sdhci_set_uhs_signaling(host, timing); +} + +static const struct sdhci_ops sdhci_cdns_ops = { + .set_clock = sdhci_set_clock, + .get_timeout_clock = sdhci_cdns_get_timeout_clock, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_reset, + .platform_execute_tuning = sdhci_cdns_execute_tuning, + .set_uhs_signaling = sdhci_cdns_set_uhs_signaling, +}; + +static const struct sdhci_pltfm_data sdhci_cdns_uniphier_pltfm_data = { + .ops = &sdhci_cdns_ops, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, +}; + +static const struct sdhci_pltfm_data sdhci_cdns_pltfm_data = { + .ops = &sdhci_cdns_ops, +}; + static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, struct mmc_ios *ios) { @@ -377,7 +379,6 @@ static int sdhci_cdns_probe(struct platform_device *pdev) priv->hrs_addr = host->ioaddr; priv->enhanced_strobe = false; host->ioaddr += SDHCI_CDNS_SRS_BASE; - host->mmc_host_ops.execute_tuning = sdhci_cdns_execute_tuning; host->mmc_host_ops.hs400_enhanced_strobe = sdhci_cdns_hs400_enhanced_strobe; sdhci_enable_v4_mode(host);