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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 3B3AFC4724C for ; Thu, 30 Apr 2020 22:07:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A32D2495C for ; Thu, 30 Apr 2020 22:07:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bhmK4NgX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728083AbgD3WHG (ORCPT ); Thu, 30 Apr 2020 18:07:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48304 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728075AbgD3WHF (ORCPT ); Thu, 30 Apr 2020 18:07:05 -0400 Received: from mail-ej1-x643.google.com (mail-ej1-x643.google.com [IPv6:2a00:1450:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3432AC035494; Thu, 30 Apr 2020 15:07:05 -0700 (PDT) Received: by mail-ej1-x643.google.com with SMTP id gr25so5994238ejb.10; Thu, 30 Apr 2020 15:07:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=W5A/crgfZBL8YxYLkhsNHl2s+K8l8jm+GhQ951aW+/A=; b=bhmK4NgXPzg+9b2pTOX7XMP/8EMjfOr97em1PZUZZXthc6eMXBGfuItM+KkSQhVpcF W7IIcBrQYURVrkZG1CaFst8mjutMNOKwDPVEWr7ff2McocuUlPz2yyZ3BGOBVEUeK4/9 sBu0ua1seONVYb5fq93X6RP3WbVv6pImCErSiG6orXkOmFmTDepfVmQV9cfu0N2ULAMr dmNEVP7UhsFWNot3hmrq0G7sW+2+iczzDnEvMWAXbCFagqTe0GsYFM5f2RKgNC7MnZQV hAiOHn1Xkod++cixNMgfXyE8hCsfxYMDddOVCUrH623VmHeVXjseSc1nurTr/go0gnUk sbGQ== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=W5A/crgfZBL8YxYLkhsNHl2s+K8l8jm+GhQ951aW+/A=; b=PzFAsfW4yyQ5chCFc4avwg/Ler6drwzaR1xnRqXzdd31MW6TtHfsO9aK+LzAOmFd9S t5qO3By8CSdShQ8enq8SNCssy4df2XgRpRSHf27pQeYImxbfN6qbB0hLbrd6NeS1tcHZ j900TyKIKo4pULSKNWhpt00LwJDzhk2VBNYBhz5hhmjat6UgWU4OvMGy35yo4uW+RB6H qb6OMdF5/h0XQP60UE/77vBCzlpGkff2pJCZSSVB/2+363Zam3v7HPf/MYtPQ8+JRTqm yMS56zDD/AOq2ioB6Me/bKHyuWHyZMX7dlQD/929PxhWPiLtOce19da0LNkfiGMeNGtm hKAg== X-Gm-Message-State: AGi0PuZidYlXaYBCg8apC0w9/Q7WvE04HVgImQo0x6/UStPrTt/qqpfn hNAzGPjIelcJbkoOf+Tg/sM= X-Google-Smtp-Source: APiQypLzZJfog1vNc6Uoeh95qV8hGH+RRLoLGbJzYGzYvuO7ke/M2nr92ZgUv1ctCRRYieb/Nvolig== X-Received: by 2002:a17:906:4e50:: with SMTP id g16mr570966ejw.338.1588284423757; Thu, 30 Apr 2020 15:07:03 -0700 (PDT) Received: from Ansuel-XPS.localdomain ([79.37.253.240]) by smtp.googlemail.com with ESMTPSA id t17sm54185edq.88.2020.04.30.15.07.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Apr 2020 15:07:03 -0700 (PDT) From: Ansuel Smith To: Bjorn Andersson Cc: Sham Muthayyan , Ansuel Smith , Andy Gross , Bjorn Helgaas , Rob Herring , Mark Rutland , Stanimir Varbanov , Lorenzo Pieralisi , Andrew Murray , Philipp Zabel , linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 11/11] PCI: qcom: add Force GEN1 support Date: Fri, 1 May 2020 00:06:18 +0200 Message-Id: <20200430220619.3169-12-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200430220619.3169-1-ansuelsmth@gmail.com> References: <20200430220619.3169-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Sham Muthayyan Add Force GEN1 support needed in some ipq8064 board that needs to limit some PCIe line to gen1 for some hardware limitation. This is set by the max-link-speed binding and needed by some soc based on ipq8064. (for example Netgear R7800 router) Signed-off-by: Sham Muthayyan Signed-off-by: Ansuel Smith --- drivers/pci/controller/dwc/pcie-qcom.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 372d2c8508b5..a568f28645e7 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -27,6 +27,7 @@ #include #include +#include "../../pci.h" #include "pcie-designware.h" #define PCIE20_PARF_SYS_CTRL 0x00 @@ -99,6 +100,8 @@ #define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358 #define SLV_ADDR_SPACE_SZ 0x10000000 +#define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xa0 + #define DEVICE_TYPE_RC 0x4 #define QCOM_PCIE_2_1_0_MAX_SUPPLY 3 @@ -205,6 +208,7 @@ struct qcom_pcie { struct phy *phy; struct gpio_desc *reset; const struct qcom_pcie_ops *ops; + int gen; }; #define to_qcom_pcie(x) dev_get_drvdata((x)->dev) @@ -462,6 +466,11 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) /* wait for clock acquisition */ usleep_range(1000, 1500); + if (pcie->gen == 1) { + qcom_clear_and_set_dword(pci->dbi_base + + PCIE20_LNK_CONTROL2_LINK_STATUS2, 0, 1); + } + /* Set the Max TLP size to 2K, instead of using default of 4K */ writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K, @@ -1431,6 +1440,10 @@ static int qcom_pcie_probe(struct platform_device *pdev) goto err_pm_runtime_put; } + pcie->gen = of_pci_get_max_link_speed(pdev->dev.of_node); + if (pcie->gen < 0) + pcie->gen = 2; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "parf"); pcie->parf = devm_ioremap_resource(dev, res); if (IS_ERR(pcie->parf)) { -- 2.25.1