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 D4250C433E2 for ; Tue, 2 Jun 2020 11:54:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B50342074B for ; Tue, 2 Jun 2020 11:54:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MABAl+mE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728480AbgFBLy6 (ORCPT ); Tue, 2 Jun 2020 07:54:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726977AbgFBLy4 (ORCPT ); Tue, 2 Jun 2020 07:54:56 -0400 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 58405C061A0E; Tue, 2 Jun 2020 04:54:55 -0700 (PDT) Received: by mail-wr1-x443.google.com with SMTP id j10so3089533wrw.8; Tue, 02 Jun 2020 04:54:55 -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=7M0pgcCpgKIyPa/msmRAjsWPWr7rOEx9Iq4gL/Ihm/M=; b=MABAl+mEplCv5avjexorM4MeCMlpqiWsDvbKgPGJa8TCuGMSFtIOLMF9a3HPXQcuQs qzzFlsMc1kcTv1VBaZ5qUbMdmwUtJCqdq0GHpDJxFJFgUhv1U5Sl34NiNdoLcLEnME8+ 5RmYc/ysWbT4k5xpaoTKWrizTrQTaRIz5xVrO0lbV56z0WypNdFcfyQtai+EU7wX7hiM qe1utxf0Ua6i7W0a4Cy/CV1Nxjgo6iScq+l1FErSp5xVYwK57oijSK08oS1pDMCM3Z8Q +E/y6R913frD++QMrhszSRFy0I3Vwi6aiSwXoV5tIjYV3o3tR1XAxsNraF1BY/ddPKJP 1ehw== 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=7M0pgcCpgKIyPa/msmRAjsWPWr7rOEx9Iq4gL/Ihm/M=; b=dAjcndXn+ck8S0L6kSwJF0B5ZnSyWE4GnOEDKOjaMFvzxKBu3SeXxtKYbJh0+2i+ED 8Tp8PY80kCD8Nyig+T3zTAP6eHKrI9HxCxamj73LVtFbXFJdi2xWd8jpxGDRBNZoc3Aa TvT2fKnEdW7d3h31EuUjuioweKKQdhQNJJfVeaq/OQwo5dgWl3B5nb4Ym0xYEZ9H0dgb Oo+Yo3hQR2CjeElH2O6T/YdsIHO5irijBh8QM2Aut4tqGnOHhbMmy0LiRJ0Z+qohMKtH aEsuyJ2SNfWk05MLdK+C4xqHMCdd3wTnEmVPNgiMK/F7fpiC2fu0+gucCys2Ve3622ay +drg== X-Gm-Message-State: AOAM532DDj9qkiSf8mnzrYwvBukak2AyiZHxnRfApTOI6A9cwBFJdhg2 SB4yEZ52zJSAGv7ELoDKScYA3kRAtBGjow== X-Google-Smtp-Source: ABdhPJypOIwgcVbOKZfGKseAXLeB7agS7aD0IDuLQSIbdUKttZtsgODYJZ3f2BbVpqx6ZtbHjdU+Ew== X-Received: by 2002:adf:c391:: with SMTP id p17mr24817566wrf.243.1591098893955; Tue, 02 Jun 2020 04:54:53 -0700 (PDT) Received: from Ansuel-XPS.localdomain (host9-254-dynamic.3-87-r.retail.telecomitalia.it. [87.3.254.9]) by smtp.googlemail.com with ESMTPSA id b18sm3273777wrn.88.2020.06.02.04.54.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jun 2020 04:54:53 -0700 (PDT) From: Ansuel Smith To: Rob Herring Cc: Sham Muthayyan , Ansuel Smith , Rob Herring , Andy Gross , Bjorn Andersson , Bjorn Helgaas , 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 v5 11/11] PCI: qcom: Add Force GEN1 support Date: Tue, 2 Jun 2020 13:53:52 +0200 Message-Id: <20200602115353.20143-12-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200602115353.20143-1-ansuelsmth@gmail.com> References: <20200602115353.20143-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 Reviewed-by: Rob Herring --- 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 259b627bf890..0ce15d53c46e 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 @@ -195,6 +198,7 @@ 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) @@ -395,6 +399,11 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) /* wait for clock acquisition */ usleep_range(1000, 1500); + if (pcie->gen == 1) { + val = readl(pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2); + val |= 1; + writel(val, pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2); + } /* Set the Max TLP size to 2K, instead of using default of 4K */ writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K, @@ -1397,6 +1406,10 @@ 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