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From: Kishon Vijay Abraham I <kishon@ti.com>
To: Jingoo Han <jingoohan1@gmail.com>,
	Joao Pinto <Joao.Pinto@synopsys.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Rob Herring <robh+dt@kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Murali Karicheri <m-karicheri2@ti.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	<Gustavo.Pimentel@synopsys.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Santosh Shilimkar <ssantosh@kernel.org>,
	Tero Kristo <t-kristo@ti.com>, Nishanth Menon <nm@ti.com>,
	<linux-pci@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>
Subject: [RFC PATCH 26/40] PCI: keystone: Explicitly set the PCIe mode
Date: Fri, 21 Sep 2018 15:51:41 +0530	[thread overview]
Message-ID: <20180921102155.22839-27-kishon@ti.com> (raw)
In-Reply-To: <20180921102155.22839-1-kishon@ti.com>

Explicitly set the PCIe mode to BOOTCFG_DEVCFG instead of always
relying on the default values. This is required when EP mode has to
be explicitly written to BOOTCFG_DEVCFG register.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 drivers/pci/controller/dwc/pci-keystone.c | 37 +++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 13e865f82f96..e8328039a017 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -80,6 +80,15 @@
 #define PCIE_RC_K2L			0xb00a
 #define PCIE_RC_K2G			0xb00b
 
+#define KS_PCIE_DEV_TYPE_MASK		(0x3 << 1)
+#define KS_PCIE_DEV_TYPE(mode)		((mode) << 1)
+
+#define EP				0x0
+#define LEG_EP				0x1
+#define RC				0x2
+
+#define KS_PCIE_SYSCLOCKOUTEN		BIT(0)
+
 #define to_keystone_pcie(x)		dev_get_drvdata((x)->dev)
 
 static int ks_pcie_start_link(struct dw_pcie *pci);
@@ -749,6 +758,30 @@ static int ks_pcie_enable_phy(struct keystone_pcie *ks_pcie)
 	return ret;
 }
 
+static int ks_pcie_set_mode(struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+	struct regmap *syscon;
+	u32 val;
+	u32 mask;
+	int ret = 0;
+
+	syscon = syscon_regmap_lookup_by_phandle(np, "ti,syscon-pcie-mode");
+	if (IS_ERR(syscon))
+		return 0;
+
+	mask = KS_PCIE_DEV_TYPE_MASK | KS_PCIE_SYSCLOCKOUTEN;
+	val = KS_PCIE_DEV_TYPE(RC) | KS_PCIE_SYSCLOCKOUTEN;
+
+	ret = regmap_update_bits(syscon, 0, mask, val);
+	if (ret) {
+		dev_err(dev, "failed to set pcie mode\n");
+		return ret;
+	}
+
+	return 0;
+}
+
 static int __init ks_pcie_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -865,6 +898,10 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
 		goto err_get_sync;
 	}
 
+	ret = ks_pcie_set_mode(dev);
+	if (ret < 0)
+		goto err_get_sync;
+
 	ret = ks_pcie_add_pcie_port(ks_pcie, pdev);
 	if (ret < 0)
 		goto err_get_sync;
-- 
2.17.1


  parent reply	other threads:[~2018-09-21 10:24 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-21 10:21 [RFC PATCH 00/40] Cleanup pci-keystone.c and Add AM654 PCIe Support Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 01/40] PCI: keystone: Use quirk to limit MRRS for K2G Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 02/40] PCI: keystone: Use quirk to set MRRS for PCI host bridge Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 03/40] PCI: keystone: Move dw_pcie_setup_rc out of ks_pcie_establish_link() Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 04/40] PCI: keystone: Do not initiate link training multiple times Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 05/40] PCI: keystone: Remove unused argument from ks_dw_pcie_host_init() Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 06/40] PCI: keystone: Add start_link/stop_link dw_pcie_ops Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 07/40] PCI: keystone: Merge pci-keystone-dw.c and pci-keystone.c Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 08/40] PCI: keystone: Cleanup MSI/legacy interrupt configuration and handling Kishon Vijay Abraham I
2021-07-03 21:01   ` Krzysztof Wilczyński
2021-07-05  8:21     ` Kishon Vijay Abraham I
2021-07-06 20:34       ` Krzysztof Wilczyński
2018-09-21 10:21 ` [RFC PATCH 09/40] PCI: keystone: Remove redundant platform_set_drvdata Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 10/40] PCI: keystone: Use uniform function naming convention Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 11/40] dt-bindings: PCI: keystone: Add bindings to get device control module Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 12/40] PCI: keystone: Use syscon APIs to get device id from " Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 13/40] dt-bindings: PCI: keystone: Add "reg-names" binding information Kishon Vijay Abraham I
     [not found]   ` <5baa1b0e.1c69fb81.4f57b.32f7@mx.google.com>
2018-11-02  7:19     ` Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 14/40] PCI: keystone: Use platform_get_resource_byname to get memory resources Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 15/40] PCI: keystone: Cleanup PHY handling Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 16/40] PCI: keystone: Invoke pm_runtime APIs to enable clock Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 17/40] PCI: keystone: Cleanup configuration space access Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 18/40] PCI: keystone: Get number of OB windows from DT and cleanup MEM space configuration Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 19/40] PCI: keystone: Cleanup set_dbi_mode and get_dbi_mode Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 20/40] PCI: keystone: Cleanup ks_pcie_link_up() Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 21/40] PCI: keystone: Add debug error message for all errors Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 22/40] PCI: keystone: Reorder header file in alphabetical order Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 23/40] PCI: keystone: Cleanup macros defined in pci-keystone.c Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 24/40] PCI: keystone: Move initializations to appropriate places Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 25/40] dt-bindings: PCI: Add dt-binding to configure PCIe mode Kishon Vijay Abraham I
2018-09-21 10:21 ` Kishon Vijay Abraham I [this message]
2018-09-21 10:21 ` [RFC PATCH 27/40] dt-bindings: PCI: Document "atu" reg-names Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 28/40] PCI: dwc: Fix ATU identification for designware version >= 4.80 Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 29/40] PCI: keystone: Prevent ARM32 specific code to be compiled for ARM64 Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 30/40] dt-bindings: PCI: Add PCI RC dt binding documentation for AM654 Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 31/40] PCI: keystone: Add support for PCIe in AM654x Platforms Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 32/40] phy: core: Invoke pm_runtime_get_*/pm_runtime_put_* before invoking reset callback Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 33/40] dt-bindings: phy: ti: Add dt binding documentation for SERDES in AM654x SoC Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 34/40] phy: ti: Add a new SERDES driver for TI's " Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 35/40] ARM: dts: keystone-k2e: Use the updated binding to describe PCIe in k2e Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 36/40] arm64: dts: k3-am6: Add "socionext,synquacer-pre-its" property to gic_its Kishon Vijay Abraham I
2018-09-21 19:42   ` Nishanth Menon
2018-09-21 10:21 ` [RFC PATCH 37/40] arm64: dts: k3-am6: Add Main System Control Module node Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 38/40] arm64: dts: k3-am6: Add mux-controller dt node required for muxing SERDES Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 39/40] arm64: dts: k3-am6: Add SERDES DT node Kishon Vijay Abraham I
2018-09-21 10:21 ` [RFC PATCH 40/40] arm64: dts: k3-am6: Add Root Complex PCIe dt node Kishon Vijay Abraham I
2018-10-12 13:47 ` [RFC PATCH 00/40] Cleanup pci-keystone.c and Add AM654 PCIe Support Lorenzo Pieralisi

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