From patchwork Mon Mar 25 08:34:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 10868337 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 80E371708 for ; Mon, 25 Mar 2019 08:39:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7245529275 for ; Mon, 25 Mar 2019 08:39:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 669FF29277; Mon, 25 Mar 2019 08:39:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0DED229275 for ; Mon, 25 Mar 2019 08:39:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730113AbfCYIgf (ORCPT ); Mon, 25 Mar 2019 04:36:35 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:54832 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730134AbfCYIgc (ORCPT ); Mon, 25 Mar 2019 04:36:32 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id x2P8a4x7106345; Mon, 25 Mar 2019 03:36:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1553502964; bh=m/r4pmfH/rvhmKXLXqhFDQ96qk6ri3w13xsKwUvy1hk=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=RREiOKaaBZjueDGcax1cuROorFpY98z3sXH9V65ZpCDRN7ICv8hND/zKnq6vF+RWT GnZbuLG0EwYXFvlLjy2zthlW0dqvS40Lbu2Pamb7rRyTcEa6yYsYsqnt6bHT047+6r xrkASv4Jj9QU1z+xgv1kzn3kvBQBhFBjhIxawi4g= Received: from DLEE109.ent.ti.com (dlee109.ent.ti.com [157.170.170.41]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x2P8a3YD090923 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 25 Mar 2019 03:36:04 -0500 Received: from DLEE102.ent.ti.com (157.170.170.32) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Mon, 25 Mar 2019 03:36:02 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1713.5 via Frontend Transport; Mon, 25 Mar 2019 03:36:02 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id x2P8ZsFh006534; Mon, 25 Mar 2019 03:35:59 -0500 From: Kishon Vijay Abraham I To: Gustavo Pimentel , Bjorn Helgaas , Rob Herring , Lorenzo Pieralisi , Arnd Bergmann , Murali Karicheri CC: Kishon Vijay Abraham I , Jingoo Han , Greg Kroah-Hartman , , , , , , Subject: [PATCH v2 01/26] PCI: keystone: Add start_link/stop_link dw_pcie_ops Date: Mon, 25 Mar 2019 14:04:36 +0530 Message-ID: <20190325083501.8088-2-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190325083501.8088-1-kishon@ti.com> References: <20190325083501.8088-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add start_link/stop_link dw_pcie_ops and invoke ks_pcie_start_link directly from host_init. start_link/stop_link ops is required for adding EP mode support. Signed-off-by: Kishon Vijay Abraham I --- drivers/pci/controller/dwc/pci-keystone.c | 44 +++++++++++------------ 1 file changed, 22 insertions(+), 22 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index b757692e2848..07f55b355d75 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -460,18 +460,33 @@ static int ks_pcie_link_up(struct dw_pcie *pci) return (val == PORT_LOGIC_LTSSM_STATE_L0); } -static void ks_pcie_initiate_link_train(struct keystone_pcie *ks_pcie) +static void ks_pcie_stop_link(struct dw_pcie *pci) { + struct keystone_pcie *ks_pcie = to_keystone_pcie(pci); u32 val; /* Disable Link training */ val = ks_pcie_app_readl(ks_pcie, CMD_STATUS); val &= ~LTSSM_EN_VAL; ks_pcie_app_writel(ks_pcie, CMD_STATUS, LTSSM_EN_VAL | val); +} + +static int ks_pcie_start_link(struct dw_pcie *pci) +{ + struct keystone_pcie *ks_pcie = to_keystone_pcie(pci); + struct device *dev = pci->dev; + u32 val; + + if (dw_pcie_link_up(pci)) { + dev_dbg(dev, "link is already up\n"); + return 0; + } /* Initiate Link Training */ val = ks_pcie_app_readl(ks_pcie, CMD_STATUS); ks_pcie_app_writel(ks_pcie, CMD_STATUS, LTSSM_EN_VAL | val); + + return 0; } /** @@ -556,26 +571,6 @@ static void ks_pcie_quirk(struct pci_dev *dev) } DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, ks_pcie_quirk); -static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie) -{ - struct dw_pcie *pci = ks_pcie->pci; - struct device *dev = pci->dev; - - if (dw_pcie_link_up(pci)) { - dev_info(dev, "Link already up\n"); - return 0; - } - - ks_pcie_initiate_link_train(ks_pcie); - - /* check if the link is up or not */ - if (!dw_pcie_wait_for_link(pci)) - return 0; - - dev_err(dev, "phy link never came up\n"); - return -ETIMEDOUT; -} - static void ks_pcie_msi_irq_handler(struct irq_desc *desc) { unsigned int irq = desc->irq_data.hwirq; @@ -813,7 +808,7 @@ static int __init ks_pcie_host_init(struct pcie_port *pp) dw_pcie_setup_rc(pp); - ks_pcie_establish_link(ks_pcie); + ks_pcie_stop_link(pci); ks_pcie_setup_rc_app_regs(ks_pcie); ks_pcie_setup_interrupts(ks_pcie); writew(PCI_IO_RANGE_TYPE_32 | (PCI_IO_RANGE_TYPE_32 << 8), @@ -830,6 +825,9 @@ static int __init ks_pcie_host_init(struct pcie_port *pp) hook_fault_code(17, ks_pcie_fault, SIGBUS, 0, "Asynchronous external abort"); + ks_pcie_start_link(pci); + dw_pcie_wait_for_link(pci); + return 0; } @@ -892,6 +890,8 @@ static const struct of_device_id ks_pcie_of_match[] = { }; static const struct dw_pcie_ops ks_pcie_dw_pcie_ops = { + .start_link = ks_pcie_start_link, + .stop_link = ks_pcie_stop_link, .link_up = ks_pcie_link_up, };