From patchwork Fri Sep 5 17:39:42 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Murali Karicheri X-Patchwork-Id: 4853821 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7D3559F32F for ; Fri, 5 Sep 2014 17:42:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7B7832021A for ; Fri, 5 Sep 2014 17:42:04 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 52C202020E for ; Fri, 5 Sep 2014 17:42:03 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XPxUN-0002Kw-PX; Fri, 05 Sep 2014 17:39:59 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XPxUJ-0001xO-KP for linux-arm-kernel@lists.infradead.org; Fri, 05 Sep 2014 17:39:56 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id s85HdMnV017166; Fri, 5 Sep 2014 12:39:22 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s85HdLug006251; Fri, 5 Sep 2014 12:39:21 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.174.1; Fri, 5 Sep 2014 12:39:21 -0500 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s85HdKlP004658; Fri, 5 Sep 2014 12:39:20 -0500 From: Murali Karicheri To: , , , Subject: [PATCH] PCI: keystone: update to support multiple pci ports Date: Fri, 5 Sep 2014 13:39:42 -0400 Message-ID: <1409938782-31460-1-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140905_103955_767538_20C7E503 X-CRM114-Status: GOOD ( 15.33 ) X-Spam-Score: -6.7 (------) Cc: Mark Rutland , Pawel Moll , Ian Campbell , Rob Herring , Murali Karicheri , Santosh Shilimkar , Kumar Gala , Bjorn Helgaas X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP K2E SoC has two PCI ports. The SATA controller is connected to second PCI port (port 1). This patch enhances the driver to support multiple ports. Update the DT Documentation for the new attribute, ti,pcie-port and remove the note for bootargs as this is no longer needed. Signed-off-by: Murali Karicheri CC: Rob Herring CC: Pawel Moll CC: Mark Rutland CC: Ian Campbell CC: Kumar Gala CC: Bjorn Helgaas CC: Santosh Shilimkar --- .../devicetree/bindings/pci/pci-keystone.txt | 8 ++++--- drivers/pci/host/pci-keystone.c | 23 ++++++++++++++------ drivers/pci/host/pci-keystone.h | 4 ++-- 3 files changed, 23 insertions(+), 12 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/pci-keystone.txt b/Documentation/devicetree/bindings/pci/pci-keystone.txt index ceb3e24..e279143 100644 --- a/Documentation/devicetree/bindings/pci/pci-keystone.txt +++ b/Documentation/devicetree/bindings/pci/pci-keystone.txt @@ -58,11 +58,13 @@ Optional properties:- phy-names: name of the Generic Keystine SerDes phy for PCI - If boot loader already does PCI link establishment, then phys and phy-names shouldn't be present. + ti,pcie-port: PCI port number. This is used to configure the PCI port + number. For example K2E SoC supports 2 PCI ports and PCI bindings + for the second port adds ti,pcie-port = <1> to identify second port + and driver uses this to configure the PCI mode register for second + port. If not present, port number 0 is assumed. Designware DT Properties not applicable for Keystone PCI 1. pcie_bus clock-names not used. Instead, a phandle to phys is used. -Note for PCI driver usage -========================= -Driver requires pci=pcie_bus_perf in the bootargs for proper functioning. diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c index a132622..b4831e8 100644 --- a/drivers/pci/host/pci-keystone.c +++ b/drivers/pci/host/pci-keystone.c @@ -252,8 +252,8 @@ static int keystone_pcie_fault(unsigned long addr, unsigned int fsr, static void __init ks_pcie_host_init(struct pcie_port *pp) { - u32 vendor_device_id, val; struct keystone_pcie *ks_pcie = to_keystone_pcie(pp); + u32 val; ks_pcie_establish_link(ks_pcie); ks_dw_pcie_setup_rc_app_regs(ks_pcie); @@ -262,8 +262,7 @@ static void __init ks_pcie_host_init(struct pcie_port *pp) pp->dbi_base + PCI_IO_BASE); /* update the Vendor ID */ - vendor_device_id = readl(ks_pcie->va_reg_pciid); - writew((vendor_device_id >> 16), pp->dbi_base + PCI_DEVICE_ID); + writew(ks_pcie->device_id, pp->dbi_base + PCI_DEVICE_ID); /* update the DEV_STAT_CTRL to publish right mrrs */ val = readl(pp->dbi_base + PCIE_CAP_BASE + PCI_EXP_DEVCTL); @@ -344,12 +343,13 @@ static int __exit ks_pcie_remove(struct platform_device *pdev) static int __init ks_pcie_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; struct keystone_pcie *ks_pcie; + int ret = 0, port_id = 0; struct pcie_port *pp; struct resource *res; void __iomem *reg_p; struct phy *phy; - int ret = 0; u32 val; ks_pcie = devm_kzalloc(&pdev->dev, sizeof(*ks_pcie), @@ -360,17 +360,24 @@ static int __init ks_pcie_probe(struct platform_device *pdev) } pp = &ks_pcie->pp; + /* read the PCI port id */ + of_property_read_u32(np, "ti,pcie-port", &port_id); + /* index 2 is the devcfg register for RC mode settings */ res = platform_get_resource(pdev, IORESOURCE_MEM, 2); reg_p = devm_ioremap_resource(dev, res); if (IS_ERR(reg_p)) return PTR_ERR(reg_p); + /* enable RC mode in devcfg */ val = readl(reg_p); - val &= ~PCIE_MODE_MASK; - val |= PCIE_RC_MODE; + port_id <<= 1; + val &= ~(PCIE_MODE_MASK << port_id); + val |= (PCIE_RC_MODE << port_id); writel(val, reg_p); + devm_iounmap(dev, reg_p); + devm_release_mem_region(dev, res->start, resource_size(res)); /* initialize SerDes Phy if present */ phy = devm_phy_get(dev, "pcie-phy"); @@ -385,7 +392,9 @@ static int __init ks_pcie_probe(struct platform_device *pdev) reg_p = devm_ioremap_resource(dev, res); if (IS_ERR(reg_p)) return PTR_ERR(reg_p); - ks_pcie->va_reg_pciid = reg_p; + ks_pcie->device_id = readl(reg_p) >> 16; + devm_iounmap(dev, reg_p); + devm_release_mem_region(dev, res->start, resource_size(res)); pp->dev = dev; platform_set_drvdata(pdev, ks_pcie); diff --git a/drivers/pci/host/pci-keystone.h b/drivers/pci/host/pci-keystone.h index 729ea7d..80cfa8e 100644 --- a/drivers/pci/host/pci-keystone.h +++ b/drivers/pci/host/pci-keystone.h @@ -19,8 +19,8 @@ struct keystone_pcie { struct clk *clk; struct pcie_port pp; - void __iomem *va_reg_pciid; - + /* PCI Device ID */ + u32 device_id; int num_legacy_host_irqs; int legacy_host_irqs[MAX_LEGACY_HOST_IRQS]; struct device_node *legacy_intc_np;