[PATCH 0/2] add new UniPhier PCIe host driver

[PATCH 0/2] add new UniPhier PCIe host driver

[Kunihiko Hayashi]

This series adds PCIe host controller driver for Socionext UniPhier SoCs.
This controller is based on the DesignWare PCIe core. This driver
supports LD20 and PXs3 SoCs.

Kunihiko Hayashi (2):
  dt-bindings: pci: add UniPhier PCIe host controller description
  pci: dwc: add UniPhier PCIe host controller support

 .../devicetree/bindings/pci/uniphier-pcie.txt      |  78 ++++
 drivers/pci/controller/dwc/Kconfig                 |   9 +
 drivers/pci/controller/dwc/Makefile                |   1 +
 drivers/pci/controller/dwc/pcie-uniphier.c         | 464 +++++++++++++++++++++
 4 files changed, 552 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt
 create mode 100644 drivers/pci/controller/dwc/pcie-uniphier.c

-- 
2.7.4

[PATCH 0/2] add new UniPhier PCIe host driver

[Kunihiko Hayashi]

This series adds PCIe host controller driver for Socionext UniPhier SoCs.
This controller is based on the DesignWare PCIe core. This driver
supports LD20 and PXs3 SoCs.

Kunihiko Hayashi (2):
  dt-bindings: pci: add UniPhier PCIe host controller description
  pci: dwc: add UniPhier PCIe host controller support

 .../devicetree/bindings/pci/uniphier-pcie.txt      |  78 ++++
 drivers/pci/controller/dwc/Kconfig                 |   9 +
 drivers/pci/controller/dwc/Makefile                |   1 +
 drivers/pci/controller/dwc/pcie-uniphier.c         | 464 +++++++++++++++++++++
 4 files changed, 552 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt
 create mode 100644 drivers/pci/controller/dwc/pcie-uniphier.c

-- 
2.7.4


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linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH 0/2] add new UniPhier PCIe host driver

[Kunihiko Hayashi]

This series adds PCIe host controller driver for Socionext UniPhier SoCs.
This controller is based on the DesignWare PCIe core. This driver
supports LD20 and PXs3 SoCs.

Kunihiko Hayashi (2):
  dt-bindings: pci: add UniPhier PCIe host controller description
  pci: dwc: add UniPhier PCIe host controller support

 .../devicetree/bindings/pci/uniphier-pcie.txt      |  78 ++++
 drivers/pci/controller/dwc/Kconfig                 |   9 +
 drivers/pci/controller/dwc/Makefile                |   1 +
 drivers/pci/controller/dwc/pcie-uniphier.c         | 464 +++++++++++++++++++++
 4 files changed, 552 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt
 create mode 100644 drivers/pci/controller/dwc/pcie-uniphier.c

-- 
2.7.4

[PATCH 1/2] dt-bindings: pci: add UniPhier PCIe host controller description

[Kunihiko Hayashi]

Add DT bindings for PCIe controller implemented in UniPhier SoCs when
configured in Root Complex (host) mode. This controller is based on
the Designware PCIe Core.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
---
 .../devicetree/bindings/pci/uniphier-pcie.txt      | 78 ++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt

diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
new file mode 100644
index 0000000..ea63f78
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
@@ -0,0 +1,78 @@
+Socionext UniPhier PCI-express host controller bindings
+
+This describes the devicetree bindings for PCI-express host controller
+implemented on Socionext UniPhier SoCs.
+
+UniPhier PCI-express host controller is based on the Synopsys DesignWare
+PCI core. It shares common functions with the PCIe DesignWare core driver
+and inherits common properties defined in
+Documentation/devicetree/bindings/pci/designware-pcie.txt.
+
+Required properties:
+- compatible: Should be "socionext,uniphier-pcie".
+- reg: Specifies offset and length of the register set for the device.
+	According to the reg-names, appropriate register sets are required.
+- reg-names: Must include the following entries:
+    "dbi"    - controller configuration registers
+    "link"   - SoC-specific glue layer registers
+    "config" - PCIe configuration space
+- clocks: A phandle to the clock gate for PCIe glue layer including
+	the host controller.
+- resets: A phandle to the reset line for PCIe glue layer including
+	the host controller.
+- interrupts: A list of interrupt specifiers. According to the
+	interrupt-names, appropriate interrupts are required.
+- interrupt-names: Must include the following entries:
+    "dma"    - DMA interrupt
+    "msi"    - MSI interrupt
+    "intx"   - Legacy INTA/B/C/D interrupt
+
+Optional properties:
+- phys: A phandle to generic PCIe PHY. According to the phy-names, appropriate
+	phys are required.
+- phy-names: Must be "pcie-phy".
+
+Required sub-node:
+- interrupt-controller: Specifies interrupt controller for legacy PCI
+	interrupts. The node name isn't important.
+
+Required properties for interrupt-controller:
+- interrupt-controller: identifies the node as an interrupt controller.
+- #interrupt-cells: specifies the number of cells needed to encode an
+	interrupt source. The value must be 1.
+
+Example:
+
+	pcie: pcie@66000000 {
+		compatible = "socionext,uniphier-pcie", "snps,dw-pcie";
+		status = "disabled";
+		reg-names = "dbi", "link", "config";
+		reg = <0x66000000 0x1000>, <0x66010000 0x10000>,
+		      <0x2fff0000 0x10000>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		clocks = <&sys_clk 24>;
+		resets = <&sys_rst 24>;
+		num-lanes = <1>;
+		num-viewport = <1>;
+		bus-range = <0x0 0xff>;
+		device_type = "pci";
+		ranges =
+		/* downstream I/O */
+			<0x81000000 0 0x00000000  0x2ffe0000  0 0x00010000
+		/* non-prefetchable memory */
+			 0x82000000 0 0x00000000  0x20000000  0 0x0ffe0000>;
+		#interrupt-cells = <1>;
+		interrupt-names = "dma", "msi", "intx";
+		interrupts = <0 224 4>, <0 225 4>, <0 226 4>;
+		interrupt-map-mask = <0 0 0  7>;
+		interrupt-map = <0 0 0  1  &pcie_intc 0>,	/* INTA */
+				<0 0 0  2  &pcie_intc 1>,	/* INTB */
+				<0 0 0  3  &pcie_intc 2>,	/* INTC */
+				<0 0 0  4  &pcie_intc 3>;	/* INTD */
+
+		pcie_intc: interrupt-controller {
+			interrupt-controller;
+			#interrupt-cells = <1>;
+		};
+	};
-- 
2.7.4

[PATCH 1/2] dt-bindings: pci: add UniPhier PCIe host controller description

[Kunihiko Hayashi]

Add DT bindings for PCIe controller implemented in UniPhier SoCs when
configured in Root Complex (host) mode. This controller is based on
the Designware PCIe Core.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
---
 .../devicetree/bindings/pci/uniphier-pcie.txt      | 78 ++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt

diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
new file mode 100644
index 0000000..ea63f78
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
@@ -0,0 +1,78 @@
+Socionext UniPhier PCI-express host controller bindings
+
+This describes the devicetree bindings for PCI-express host controller
+implemented on Socionext UniPhier SoCs.
+
+UniPhier PCI-express host controller is based on the Synopsys DesignWare
+PCI core. It shares common functions with the PCIe DesignWare core driver
+and inherits common properties defined in
+Documentation/devicetree/bindings/pci/designware-pcie.txt.
+
+Required properties:
+- compatible: Should be "socionext,uniphier-pcie".
+- reg: Specifies offset and length of the register set for the device.
+	According to the reg-names, appropriate register sets are required.
+- reg-names: Must include the following entries:
+    "dbi"    - controller configuration registers
+    "link"   - SoC-specific glue layer registers
+    "config" - PCIe configuration space
+- clocks: A phandle to the clock gate for PCIe glue layer including
+	the host controller.
+- resets: A phandle to the reset line for PCIe glue layer including
+	the host controller.
+- interrupts: A list of interrupt specifiers. According to the
+	interrupt-names, appropriate interrupts are required.
+- interrupt-names: Must include the following entries:
+    "dma"    - DMA interrupt
+    "msi"    - MSI interrupt
+    "intx"   - Legacy INTA/B/C/D interrupt
+
+Optional properties:
+- phys: A phandle to generic PCIe PHY. According to the phy-names, appropriate
+	phys are required.
+- phy-names: Must be "pcie-phy".
+
+Required sub-node:
+- interrupt-controller: Specifies interrupt controller for legacy PCI
+	interrupts. The node name isn't important.
+
+Required properties for interrupt-controller:
+- interrupt-controller: identifies the node as an interrupt controller.
+- #interrupt-cells: specifies the number of cells needed to encode an
+	interrupt source. The value must be 1.
+
+Example:
+
+	pcie: pcie@66000000 {
+		compatible = "socionext,uniphier-pcie", "snps,dw-pcie";
+		status = "disabled";
+		reg-names = "dbi", "link", "config";
+		reg = <0x66000000 0x1000>, <0x66010000 0x10000>,
+		      <0x2fff0000 0x10000>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		clocks = <&sys_clk 24>;
+		resets = <&sys_rst 24>;
+		num-lanes = <1>;
+		num-viewport = <1>;
+		bus-range = <0x0 0xff>;
+		device_type = "pci";
+		ranges =
+		/* downstream I/O */
+			<0x81000000 0 0x00000000  0x2ffe0000  0 0x00010000
+		/* non-prefetchable memory */
+			 0x82000000 0 0x00000000  0x20000000  0 0x0ffe0000>;
+		#interrupt-cells = <1>;
+		interrupt-names = "dma", "msi", "intx";
+		interrupts = <0 224 4>, <0 225 4>, <0 226 4>;
+		interrupt-map-mask = <0 0 0  7>;
+		interrupt-map = <0 0 0  1  &pcie_intc 0>,	/* INTA */
+				<0 0 0  2  &pcie_intc 1>,	/* INTB */
+				<0 0 0  3  &pcie_intc 2>,	/* INTC */
+				<0 0 0  4  &pcie_intc 3>;	/* INTD */
+
+		pcie_intc: interrupt-controller {
+			interrupt-controller;
+			#interrupt-cells = <1>;
+		};
+	};
-- 
2.7.4


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH 1/2] dt-bindings: pci: add UniPhier PCIe host controller description

[Kunihiko Hayashi]

Add DT bindings for PCIe controller implemented in UniPhier SoCs when
configured in Root Complex (host) mode. This controller is based on
the Designware PCIe Core.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
---
 .../devicetree/bindings/pci/uniphier-pcie.txt      | 78 ++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt

diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
new file mode 100644
index 0000000..ea63f78
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
@@ -0,0 +1,78 @@
+Socionext UniPhier PCI-express host controller bindings
+
+This describes the devicetree bindings for PCI-express host controller
+implemented on Socionext UniPhier SoCs.
+
+UniPhier PCI-express host controller is based on the Synopsys DesignWare
+PCI core. It shares common functions with the PCIe DesignWare core driver
+and inherits common properties defined in
+Documentation/devicetree/bindings/pci/designware-pcie.txt.
+
+Required properties:
+- compatible: Should be "socionext,uniphier-pcie".
+- reg: Specifies offset and length of the register set for the device.
+	According to the reg-names, appropriate register sets are required.
+- reg-names: Must include the following entries:
+    "dbi"    - controller configuration registers
+    "link"   - SoC-specific glue layer registers
+    "config" - PCIe configuration space
+- clocks: A phandle to the clock gate for PCIe glue layer including
+	the host controller.
+- resets: A phandle to the reset line for PCIe glue layer including
+	the host controller.
+- interrupts: A list of interrupt specifiers. According to the
+	interrupt-names, appropriate interrupts are required.
+- interrupt-names: Must include the following entries:
+    "dma"    - DMA interrupt
+    "msi"    - MSI interrupt
+    "intx"   - Legacy INTA/B/C/D interrupt
+
+Optional properties:
+- phys: A phandle to generic PCIe PHY. According to the phy-names, appropriate
+	phys are required.
+- phy-names: Must be "pcie-phy".
+
+Required sub-node:
+- interrupt-controller: Specifies interrupt controller for legacy PCI
+	interrupts. The node name isn't important.
+
+Required properties for interrupt-controller:
+- interrupt-controller: identifies the node as an interrupt controller.
+- #interrupt-cells: specifies the number of cells needed to encode an
+	interrupt source. The value must be 1.
+
+Example:
+
+	pcie: pcie at 66000000 {
+		compatible = "socionext,uniphier-pcie", "snps,dw-pcie";
+		status = "disabled";
+		reg-names = "dbi", "link", "config";
+		reg = <0x66000000 0x1000>, <0x66010000 0x10000>,
+		      <0x2fff0000 0x10000>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		clocks = <&sys_clk 24>;
+		resets = <&sys_rst 24>;
+		num-lanes = <1>;
+		num-viewport = <1>;
+		bus-range = <0x0 0xff>;
+		device_type = "pci";
+		ranges =
+		/* downstream I/O */
+			<0x81000000 0 0x00000000  0x2ffe0000  0 0x00010000
+		/* non-prefetchable memory */
+			 0x82000000 0 0x00000000  0x20000000  0 0x0ffe0000>;
+		#interrupt-cells = <1>;
+		interrupt-names = "dma", "msi", "intx";
+		interrupts = <0 224 4>, <0 225 4>, <0 226 4>;
+		interrupt-map-mask = <0 0 0  7>;
+		interrupt-map = <0 0 0  1  &pcie_intc 0>,	/* INTA */
+				<0 0 0  2  &pcie_intc 1>,	/* INTB */
+				<0 0 0  3  &pcie_intc 2>,	/* INTC */
+				<0 0 0  4  &pcie_intc 3>;	/* INTD */
+
+		pcie_intc: interrupt-controller {
+			interrupt-controller;
+			#interrupt-cells = <1>;
+		};
+	};
-- 
2.7.4

[PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Kunihiko Hayashi]

This introduces specific glue layer for UniPhier platform to support
PCIe host controller that is based on the Designware PCIe Core, and
this driver supports Root Complex (host) mode.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
---
 drivers/pci/controller/dwc/Kconfig         |   9 +
 drivers/pci/controller/dwc/Makefile        |   1 +
 drivers/pci/controller/dwc/pcie-uniphier.c | 464 +++++++++++++++++++++++++++++
 3 files changed, 474 insertions(+)
 create mode 100644 drivers/pci/controller/dwc/pcie-uniphier.c

diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index 91b0194..d8fdb02 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -193,4 +193,13 @@ config PCIE_HISI_STB
 	help
           Say Y here if you want PCIe controller support on HiSilicon STB SoCs
 
+config PCIE_UNIPHIER
+	bool "Socionext UniPhier PCIe controllers"
+	depends on OF && (ARCH_UNIPHIER || COMPILE_TEST)
+	depends on PCI_MSI_IRQ_DOMAIN
+	select PCIE_DW_HOST
+	help
+	  Say Y here if you want PCIe controller support on UniPhier SoCs.
+	  This driver supports LD20 and PXs3 SoCs.
+
 endmenu
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index 5d2ce72..cbde733 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_PCIE_ARMADA_8K) += pcie-armada8k.o
 obj-$(CONFIG_PCIE_ARTPEC6) += pcie-artpec6.o
 obj-$(CONFIG_PCIE_KIRIN) += pcie-kirin.o
 obj-$(CONFIG_PCIE_HISI_STB) += pcie-histb.o
+obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
 
 # The following drivers are for devices that use the generic ACPI
 # pci_root.c driver but don't support standard ECAM config access.
diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
new file mode 100644
index 0000000..13ce02e
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -0,0 +1,464 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// PCI-express host controller driver for UniPhier SoCs
+// Copyright 2018 Socionext Inc.
+// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include "pcie-designware.h"
+
+#define PCL_PINCTRL0			0x002c
+#define PCL_PERST_PLDN_REGEN		BIT(12)
+#define PCL_PERST_NOE_REGEN		BIT(11)
+#define PCL_PERST_OUT_REGEN		BIT(8)
+#define PCL_PERST_PLDN_REGVAL		BIT(4)
+#define PCL_PERST_NOE_REGVAL		BIT(3)
+#define PCL_PERST_OUT_REGVAL		BIT(0)
+
+#define PCL_PIPEMON			0x0044
+#define PCL_PCLK_ALIVE			BIT(15)
+
+#define PCL_APP_READY_CTRL		0x8008
+#define PCL_APP_LTSSM_ENABLE		BIT(0)
+
+#define PCL_APP_PM0			0x8078
+#define PCL_SYS_AUX_PWR_DET		BIT(8)
+
+#define PCL_RCV_INT			0x8108
+#define PCL_CFG_BW_MGT_ENABLE		BIT(20)
+#define PCL_CFG_LINK_AUTO_BW_ENABLE	BIT(19)
+#define PCL_CFG_AER_RC_ERR_MSI_ENABLE	BIT(18)
+#define PCL_CFG_PME_MSI_ENABLE		BIT(17)
+#define PCL_CFG_BW_MGT_STATUS		BIT(4)
+#define PCL_CFG_LINK_AUTO_BW_STATUS	BIT(3)
+#define PCL_CFG_AER_RC_ERR_MSI_STATUS	BIT(2)
+#define PCL_CFG_PME_MSI_STATUS		BIT(1)
+#define PCL_RCV_INT_ALL_ENABLE			\
+	(PCL_CFG_BW_MGT_ENABLE | PCL_CFG_LINK_AUTO_BW_ENABLE \
+	 | PCL_CFG_AER_RC_ERR_MSI_ENABLE | PCL_CFG_PME_MSI_ENABLE)
+
+#define PCL_RCV_INTX			0x810c
+#define PCL_RADM_INTD_ENABLE		BIT(19)
+#define PCL_RADM_INTC_ENABLE		BIT(18)
+#define PCL_RADM_INTB_ENABLE		BIT(17)
+#define PCL_RADM_INTA_ENABLE		BIT(16)
+#define PCL_RADM_INTD_STATUS		BIT(3)
+#define PCL_RADM_INTC_STATUS		BIT(2)
+#define PCL_RADM_INTB_STATUS		BIT(1)
+#define PCL_RADM_INTA_STATUS		BIT(0)
+#define PCL_RCV_INTX_ALL_ENABLE			\
+	(PCL_RADM_INTD_ENABLE | PCL_RADM_INTC_ENABLE \
+	 | PCL_RADM_INTB_ENABLE	| PCL_RADM_INTA_ENABLE)
+
+#define PCL_STATUS_LINK			0x8140
+#define PCL_RDLH_LINK_UP		BIT(1)
+#define PCL_XMLH_LINK_UP		BIT(0)
+
+struct uniphier_pcie_priv {
+	void __iomem *base;
+	struct dw_pcie pci;
+	struct clk *clk;
+	struct reset_control *rst;
+	struct phy *phy;
+	struct irq_domain *irq_domain;
+};
+
+#define to_uniphier_pcie(x)	dev_get_drvdata((x)->dev)
+
+static void uniphier_pcie_ltssm_enable(struct uniphier_pcie_priv *priv)
+{
+	u32 val;
+
+	val = readl(priv->base + PCL_APP_READY_CTRL);
+	val |= PCL_APP_LTSSM_ENABLE;
+	writel(val, priv->base + PCL_APP_READY_CTRL);
+}
+
+static void uniphier_pcie_ltssm_disable(struct uniphier_pcie_priv *priv)
+{
+	u32 val;
+
+	val = readl(priv->base + PCL_APP_READY_CTRL);
+	val &= ~PCL_APP_LTSSM_ENABLE;
+	writel(val, priv->base + PCL_APP_READY_CTRL);
+}
+
+static void uniphier_pcie_init_rc(struct uniphier_pcie_priv *priv)
+{
+	u32 val;
+
+	/* use auxiliary power detection */
+	val = readl(priv->base + PCL_APP_PM0);
+	val |= PCL_SYS_AUX_PWR_DET;
+	writel(val, priv->base + PCL_APP_PM0);
+
+	/* assert PERST# */
+	val = readl(priv->base + PCL_PINCTRL0);
+	val &= ~(PCL_PERST_NOE_REGVAL | PCL_PERST_OUT_REGVAL
+		 | PCL_PERST_PLDN_REGVAL);
+	val |= PCL_PERST_NOE_REGEN | PCL_PERST_OUT_REGEN
+		| PCL_PERST_PLDN_REGEN;
+	writel(val, priv->base + PCL_PINCTRL0);
+
+	uniphier_pcie_ltssm_disable(priv);
+
+	usleep_range(100000, 200000);
+
+	/* deassert PERST# */
+	val = readl(priv->base + PCL_PINCTRL0);
+	val |= PCL_PERST_OUT_REGVAL | PCL_PERST_OUT_REGEN;
+	writel(val, priv->base + PCL_PINCTRL0);
+}
+
+static int uniphier_pcie_wait_rc(struct uniphier_pcie_priv *priv)
+{
+	u32 status;
+	int ret;
+
+	/* wait PIPE clock */
+	ret = readl_poll_timeout(priv->base + PCL_PIPEMON, status,
+				 status & PCL_PCLK_ALIVE, 100000, 1000000);
+	if (ret) {
+		dev_err(priv->pci.dev,
+			"Failed to initialize controller in RC mode\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int uniphier_pcie_link_up(struct dw_pcie *pci)
+{
+	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
+	u32 val, mask;
+
+	val = readl(priv->base + PCL_STATUS_LINK);
+	mask = PCL_RDLH_LINK_UP | PCL_XMLH_LINK_UP;
+
+	return (val & mask) == mask;
+}
+
+static int uniphier_pcie_establish_link(struct dw_pcie *pci)
+{
+	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
+	int ret;
+
+	if (dw_pcie_link_up(pci))
+		return 0;
+
+	uniphier_pcie_ltssm_enable(priv);
+
+	ret = dw_pcie_wait_for_link(pci);
+	if (ret == -ETIMEDOUT) {
+		dev_warn(pci->dev, "Link not up\n");
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static void uniphier_pcie_stop_link(struct dw_pcie *pci)
+{
+	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
+
+	uniphier_pcie_ltssm_disable(priv);
+}
+
+static int uniphier_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+				  irq_hw_number_t hwirq)
+{
+	irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
+	irq_set_chip_data(irq, domain->host_data);
+
+	return 0;
+}
+
+static const struct irq_domain_ops uniphier_intx_domain_ops = {
+	.map = uniphier_pcie_intx_map,
+};
+
+static int uniphier_pcie_init_irq_domain(struct pcie_port *pp)
+{
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
+	struct device_node *np = pci->dev->of_node;
+	struct device_node *np_intc = of_get_next_child(np, NULL);
+
+	if (!np_intc) {
+		dev_err(pci->dev, "Failed to get child node\n");
+		return -ENODEV;
+	}
+
+	priv->irq_domain = irq_domain_add_linear(np_intc, PCI_NUM_INTX,
+						 &uniphier_intx_domain_ops,
+						 pp);
+	if (!priv->irq_domain) {
+		dev_err(pci->dev, "Failed to get INTx domain\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void uniphier_pcie_irq_enable(struct uniphier_pcie_priv *priv)
+{
+	writel(PCL_RCV_INT_ALL_ENABLE, priv->base + PCL_RCV_INT);
+	writel(PCL_RCV_INTX_ALL_ENABLE, priv->base + PCL_RCV_INTX);
+}
+
+static void uniphier_pcie_irq_disable(struct uniphier_pcie_priv *priv)
+{
+	writel(0, priv->base + PCL_RCV_INT);
+	writel(0, priv->base + PCL_RCV_INTX);
+}
+
+static irqreturn_t uniphier_pcie_irq_handler(int irq, void *arg)
+{
+	struct uniphier_pcie_priv *priv = arg;
+	struct dw_pcie *pci = &priv->pci;
+	u32 val;
+
+	/* INT for debug */
+	val = readl(priv->base + PCL_RCV_INT);
+
+	if (val & PCL_CFG_BW_MGT_STATUS)
+		dev_dbg(pci->dev, "Link Bandwidth Management Event\n");
+	if (val & PCL_CFG_LINK_AUTO_BW_STATUS)
+		dev_dbg(pci->dev, "Link Autonomous Bandwidth Event\n");
+	if (val & PCL_CFG_AER_RC_ERR_MSI_STATUS)
+		dev_dbg(pci->dev, "Root Error\n");
+	if (val & PCL_CFG_PME_MSI_STATUS)
+		dev_dbg(pci->dev, "PME Interrupt\n");
+
+	writel(val, priv->base + PCL_RCV_INT);
+
+	/* INTx */
+	val = readl(priv->base + PCL_RCV_INTX);
+
+	if (val & PCL_RADM_INTA_STATUS)
+		generic_handle_irq(irq_find_mapping(priv->irq_domain, 0));
+	if (val & PCL_RADM_INTB_STATUS)
+		generic_handle_irq(irq_find_mapping(priv->irq_domain, 1));
+	if (val & PCL_RADM_INTC_STATUS)
+		generic_handle_irq(irq_find_mapping(priv->irq_domain, 2));
+	if (val & PCL_RADM_INTD_STATUS)
+		generic_handle_irq(irq_find_mapping(priv->irq_domain, 3));
+
+	writel(val, priv->base + PCL_RCV_INTX);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t uniphier_pcie_msi_irq_handler(int irq, void *arg)
+{
+	struct pcie_port *pp = arg;
+
+	return dw_handle_msi_irq(pp);
+}
+
+static int uniphier_pcie_host_init(struct pcie_port *pp)
+{
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	int ret;
+
+	dw_pcie_setup_rc(pp);
+	ret = uniphier_pcie_establish_link(pci);
+	if (ret)
+		return ret;
+
+	if (IS_ENABLED(CONFIG_PCI_MSI))
+		dw_pcie_msi_init(pp);
+
+	return 0;
+}
+
+static const struct dw_pcie_host_ops uniphier_pcie_host_ops = {
+	.host_init = uniphier_pcie_host_init,
+};
+
+static int uniphier_add_pcie_port(struct uniphier_pcie_priv *priv,
+				  struct platform_device *pdev)
+{
+	struct dw_pcie *pci = &priv->pci;
+	struct pcie_port *pp = &pci->pp;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	pp->root_bus_nr = -1;
+	pp->ops = &uniphier_pcie_host_ops;
+
+	pp->irq = platform_get_irq_byname(pdev, "intx");
+	if (pp->irq < 0) {
+		dev_err(dev, "Failed to get intx irq\n");
+		return pp->irq;
+	}
+
+	ret = devm_request_irq(dev, pp->irq, uniphier_pcie_irq_handler,
+			       IRQF_SHARED, "pcie", priv);
+	if (ret) {
+		dev_err(dev, "Failed to request irq %d\n", pp->irq);
+		return ret;
+	}
+
+	ret = uniphier_pcie_init_irq_domain(pp);
+	if (ret)
+		return ret;
+
+	if (IS_ENABLED(CONFIG_PCI_MSI)) {
+		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
+		if (pp->msi_irq < 0)
+			return pp->msi_irq;
+
+		ret = devm_request_irq(dev, pp->msi_irq,
+				       uniphier_pcie_msi_irq_handler,
+				       IRQF_SHARED, "pcie-msi", pp);
+		if (ret) {
+			dev_err(dev, "failed to request msi_irq %d\n",
+				pp->msi_irq);
+			return ret;
+		}
+	}
+
+	ret = dw_pcie_host_init(pp);
+	if (ret) {
+		dev_err(dev, "Failed to initialize host (%d)\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int uniphier_pcie_host_enable(struct uniphier_pcie_priv *priv)
+{
+	int ret;
+
+	ret = clk_prepare_enable(priv->clk);
+	if (ret)
+		return ret;
+
+	ret = reset_control_deassert(priv->rst);
+	if (ret)
+		goto out_clk_disable;
+
+	uniphier_pcie_init_rc(priv);
+
+	ret = phy_init(priv->phy);
+	if (ret)
+		goto out_rst_assert;
+
+	ret = uniphier_pcie_wait_rc(priv);
+	if (ret)
+		goto out_phy_exit;
+
+	uniphier_pcie_irq_enable(priv);
+
+	return 0;
+
+out_phy_exit:
+	phy_exit(priv->phy);
+out_rst_assert:
+	reset_control_assert(priv->rst);
+out_clk_disable:
+	clk_disable_unprepare(priv->clk);
+
+	return ret;
+}
+
+static void uniphier_pcie_host_disable(struct uniphier_pcie_priv *priv)
+{
+	uniphier_pcie_irq_disable(priv);
+	phy_exit(priv->phy);
+	reset_control_assert(priv->rst);
+	clk_disable_unprepare(priv->clk);
+}
+
+static const struct dw_pcie_ops dw_pcie_ops = {
+	.start_link = uniphier_pcie_establish_link,
+	.stop_link = uniphier_pcie_stop_link,
+	.link_up = uniphier_pcie_link_up,
+};
+
+static int uniphier_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct uniphier_pcie_priv *priv;
+	struct resource *res;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->pci.dev = dev;
+	priv->pci.ops = &dw_pcie_ops;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
+	priv->pci.dbi_base = devm_pci_remap_cfg_resource(dev, res);
+	if (IS_ERR(priv->pci.dbi_base))
+		return PTR_ERR(priv->pci.dbi_base);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "link");
+	priv->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
+
+	priv->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(priv->clk))
+		return PTR_ERR(priv->clk);
+
+	priv->rst = devm_reset_control_get_shared(dev, NULL);
+	if (IS_ERR(priv->rst))
+		return PTR_ERR(priv->rst);
+
+	priv->phy = devm_phy_optional_get(dev, "pcie-phy");
+	if (IS_ERR(priv->phy))
+		return PTR_ERR(priv->phy);
+
+	platform_set_drvdata(pdev, priv);
+
+	ret = uniphier_pcie_host_enable(priv);
+	if (ret)
+		return ret;
+
+	return uniphier_add_pcie_port(priv, pdev);
+}
+
+static int uniphier_pcie_remove(struct platform_device *pdev)
+{
+	struct uniphier_pcie_priv *priv = platform_get_drvdata(pdev);
+
+	uniphier_pcie_host_disable(priv);
+
+	return 0;
+}
+
+static const struct of_device_id uniphier_pcie_match[] = {
+	{ .compatible = "socionext,uniphier-pcie", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, uniphier_pcie_match);
+
+static struct platform_driver uniphier_pcie_driver = {
+	.probe  = uniphier_pcie_probe,
+	.remove = uniphier_pcie_remove,
+	.driver = {
+		.name = "uniphier-pcie",
+		.of_match_table = uniphier_pcie_match,
+	},
+};
+builtin_platform_driver(uniphier_pcie_driver);
+
+MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>");
+MODULE_DESCRIPTION("UniPhier PCIe host controller driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

[PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Kunihiko Hayashi]

This introduces specific glue layer for UniPhier platform to support
PCIe host controller that is based on the Designware PCIe Core, and
this driver supports Root Complex (host) mode.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
---
 drivers/pci/controller/dwc/Kconfig         |   9 +
 drivers/pci/controller/dwc/Makefile        |   1 +
 drivers/pci/controller/dwc/pcie-uniphier.c | 464 +++++++++++++++++++++++++++++
 3 files changed, 474 insertions(+)
 create mode 100644 drivers/pci/controller/dwc/pcie-uniphier.c

diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index 91b0194..d8fdb02 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -193,4 +193,13 @@ config PCIE_HISI_STB
 	help
           Say Y here if you want PCIe controller support on HiSilicon STB SoCs
 
+config PCIE_UNIPHIER
+	bool "Socionext UniPhier PCIe controllers"
+	depends on OF && (ARCH_UNIPHIER || COMPILE_TEST)
+	depends on PCI_MSI_IRQ_DOMAIN
+	select PCIE_DW_HOST
+	help
+	  Say Y here if you want PCIe controller support on UniPhier SoCs.
+	  This driver supports LD20 and PXs3 SoCs.
+
 endmenu
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index 5d2ce72..cbde733 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_PCIE_ARMADA_8K) += pcie-armada8k.o
 obj-$(CONFIG_PCIE_ARTPEC6) += pcie-artpec6.o
 obj-$(CONFIG_PCIE_KIRIN) += pcie-kirin.o
 obj-$(CONFIG_PCIE_HISI_STB) += pcie-histb.o
+obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
 
 # The following drivers are for devices that use the generic ACPI
 # pci_root.c driver but don't support standard ECAM config access.
diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
new file mode 100644
index 0000000..13ce02e
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -0,0 +1,464 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// PCI-express host controller driver for UniPhier SoCs
+// Copyright 2018 Socionext Inc.
+// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include "pcie-designware.h"
+
+#define PCL_PINCTRL0			0x002c
+#define PCL_PERST_PLDN_REGEN		BIT(12)
+#define PCL_PERST_NOE_REGEN		BIT(11)
+#define PCL_PERST_OUT_REGEN		BIT(8)
+#define PCL_PERST_PLDN_REGVAL		BIT(4)
+#define PCL_PERST_NOE_REGVAL		BIT(3)
+#define PCL_PERST_OUT_REGVAL		BIT(0)
+
+#define PCL_PIPEMON			0x0044
+#define PCL_PCLK_ALIVE			BIT(15)
+
+#define PCL_APP_READY_CTRL		0x8008
+#define PCL_APP_LTSSM_ENABLE		BIT(0)
+
+#define PCL_APP_PM0			0x8078
+#define PCL_SYS_AUX_PWR_DET		BIT(8)
+
+#define PCL_RCV_INT			0x8108
+#define PCL_CFG_BW_MGT_ENABLE		BIT(20)
+#define PCL_CFG_LINK_AUTO_BW_ENABLE	BIT(19)
+#define PCL_CFG_AER_RC_ERR_MSI_ENABLE	BIT(18)
+#define PCL_CFG_PME_MSI_ENABLE		BIT(17)
+#define PCL_CFG_BW_MGT_STATUS		BIT(4)
+#define PCL_CFG_LINK_AUTO_BW_STATUS	BIT(3)
+#define PCL_CFG_AER_RC_ERR_MSI_STATUS	BIT(2)
+#define PCL_CFG_PME_MSI_STATUS		BIT(1)
+#define PCL_RCV_INT_ALL_ENABLE			\
+	(PCL_CFG_BW_MGT_ENABLE | PCL_CFG_LINK_AUTO_BW_ENABLE \
+	 | PCL_CFG_AER_RC_ERR_MSI_ENABLE | PCL_CFG_PME_MSI_ENABLE)
+
+#define PCL_RCV_INTX			0x810c
+#define PCL_RADM_INTD_ENABLE		BIT(19)
+#define PCL_RADM_INTC_ENABLE		BIT(18)
+#define PCL_RADM_INTB_ENABLE		BIT(17)
+#define PCL_RADM_INTA_ENABLE		BIT(16)
+#define PCL_RADM_INTD_STATUS		BIT(3)
+#define PCL_RADM_INTC_STATUS		BIT(2)
+#define PCL_RADM_INTB_STATUS		BIT(1)
+#define PCL_RADM_INTA_STATUS		BIT(0)
+#define PCL_RCV_INTX_ALL_ENABLE			\
+	(PCL_RADM_INTD_ENABLE | PCL_RADM_INTC_ENABLE \
+	 | PCL_RADM_INTB_ENABLE	| PCL_RADM_INTA_ENABLE)
+
+#define PCL_STATUS_LINK			0x8140
+#define PCL_RDLH_LINK_UP		BIT(1)
+#define PCL_XMLH_LINK_UP		BIT(0)
+
+struct uniphier_pcie_priv {
+	void __iomem *base;
+	struct dw_pcie pci;
+	struct clk *clk;
+	struct reset_control *rst;
+	struct phy *phy;
+	struct irq_domain *irq_domain;
+};
+
+#define to_uniphier_pcie(x)	dev_get_drvdata((x)->dev)
+
+static void uniphier_pcie_ltssm_enable(struct uniphier_pcie_priv *priv)
+{
+	u32 val;
+
+	val = readl(priv->base + PCL_APP_READY_CTRL);
+	val |= PCL_APP_LTSSM_ENABLE;
+	writel(val, priv->base + PCL_APP_READY_CTRL);
+}
+
+static void uniphier_pcie_ltssm_disable(struct uniphier_pcie_priv *priv)
+{
+	u32 val;
+
+	val = readl(priv->base + PCL_APP_READY_CTRL);
+	val &= ~PCL_APP_LTSSM_ENABLE;
+	writel(val, priv->base + PCL_APP_READY_CTRL);
+}
+
+static void uniphier_pcie_init_rc(struct uniphier_pcie_priv *priv)
+{
+	u32 val;
+
+	/* use auxiliary power detection */
+	val = readl(priv->base + PCL_APP_PM0);
+	val |= PCL_SYS_AUX_PWR_DET;
+	writel(val, priv->base + PCL_APP_PM0);
+
+	/* assert PERST# */
+	val = readl(priv->base + PCL_PINCTRL0);
+	val &= ~(PCL_PERST_NOE_REGVAL | PCL_PERST_OUT_REGVAL
+		 | PCL_PERST_PLDN_REGVAL);
+	val |= PCL_PERST_NOE_REGEN | PCL_PERST_OUT_REGEN
+		| PCL_PERST_PLDN_REGEN;
+	writel(val, priv->base + PCL_PINCTRL0);
+
+	uniphier_pcie_ltssm_disable(priv);
+
+	usleep_range(100000, 200000);
+
+	/* deassert PERST# */
+	val = readl(priv->base + PCL_PINCTRL0);
+	val |= PCL_PERST_OUT_REGVAL | PCL_PERST_OUT_REGEN;
+	writel(val, priv->base + PCL_PINCTRL0);
+}
+
+static int uniphier_pcie_wait_rc(struct uniphier_pcie_priv *priv)
+{
+	u32 status;
+	int ret;
+
+	/* wait PIPE clock */
+	ret = readl_poll_timeout(priv->base + PCL_PIPEMON, status,
+				 status & PCL_PCLK_ALIVE, 100000, 1000000);
+	if (ret) {
+		dev_err(priv->pci.dev,
+			"Failed to initialize controller in RC mode\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int uniphier_pcie_link_up(struct dw_pcie *pci)
+{
+	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
+	u32 val, mask;
+
+	val = readl(priv->base + PCL_STATUS_LINK);
+	mask = PCL_RDLH_LINK_UP | PCL_XMLH_LINK_UP;
+
+	return (val & mask) == mask;
+}
+
+static int uniphier_pcie_establish_link(struct dw_pcie *pci)
+{
+	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
+	int ret;
+
+	if (dw_pcie_link_up(pci))
+		return 0;
+
+	uniphier_pcie_ltssm_enable(priv);
+
+	ret = dw_pcie_wait_for_link(pci);
+	if (ret == -ETIMEDOUT) {
+		dev_warn(pci->dev, "Link not up\n");
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static void uniphier_pcie_stop_link(struct dw_pcie *pci)
+{
+	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
+
+	uniphier_pcie_ltssm_disable(priv);
+}
+
+static int uniphier_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+				  irq_hw_number_t hwirq)
+{
+	irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
+	irq_set_chip_data(irq, domain->host_data);
+
+	return 0;
+}
+
+static const struct irq_domain_ops uniphier_intx_domain_ops = {
+	.map = uniphier_pcie_intx_map,
+};
+
+static int uniphier_pcie_init_irq_domain(struct pcie_port *pp)
+{
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	struct uniphier_pcie_priv *priv = to_uniphier_pcie(pci);
+	struct device_node *np = pci->dev->of_node;
+	struct device_node *np_intc = of_get_next_child(np, NULL);
+
+	if (!np_intc) {
+		dev_err(pci->dev, "Failed to get child node\n");
+		return -ENODEV;
+	}
+
+	priv->irq_domain = irq_domain_add_linear(np_intc, PCI_NUM_INTX,
+						 &uniphier_intx_domain_ops,
+						 pp);
+	if (!priv->irq_domain) {
+		dev_err(pci->dev, "Failed to get INTx domain\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void uniphier_pcie_irq_enable(struct uniphier_pcie_priv *priv)
+{
+	writel(PCL_RCV_INT_ALL_ENABLE, priv->base + PCL_RCV_INT);
+	writel(PCL_RCV_INTX_ALL_ENABLE, priv->base + PCL_RCV_INTX);
+}
+
+static void uniphier_pcie_irq_disable(struct uniphier_pcie_priv *priv)
+{
+	writel(0, priv->base + PCL_RCV_INT);
+	writel(0, priv->base + PCL_RCV_INTX);
+}
+
+static irqreturn_t uniphier_pcie_irq_handler(int irq, void *arg)
+{
+	struct uniphier_pcie_priv *priv = arg;
+	struct dw_pcie *pci = &priv->pci;
+	u32 val;
+
+	/* INT for debug */
+	val = readl(priv->base + PCL_RCV_INT);
+
+	if (val & PCL_CFG_BW_MGT_STATUS)
+		dev_dbg(pci->dev, "Link Bandwidth Management Event\n");
+	if (val & PCL_CFG_LINK_AUTO_BW_STATUS)
+		dev_dbg(pci->dev, "Link Autonomous Bandwidth Event\n");
+	if (val & PCL_CFG_AER_RC_ERR_MSI_STATUS)
+		dev_dbg(pci->dev, "Root Error\n");
+	if (val & PCL_CFG_PME_MSI_STATUS)
+		dev_dbg(pci->dev, "PME Interrupt\n");
+
+	writel(val, priv->base + PCL_RCV_INT);
+
+	/* INTx */
+	val = readl(priv->base + PCL_RCV_INTX);
+
+	if (val & PCL_RADM_INTA_STATUS)
+		generic_handle_irq(irq_find_mapping(priv->irq_domain, 0));
+	if (val & PCL_RADM_INTB_STATUS)
+		generic_handle_irq(irq_find_mapping(priv->irq_domain, 1));
+	if (val & PCL_RADM_INTC_STATUS)
+		generic_handle_irq(irq_find_mapping(priv->irq_domain, 2));
+	if (val & PCL_RADM_INTD_STATUS)
+		generic_handle_irq(irq_find_mapping(priv->irq_domain, 3));
+
+	writel(val, priv->base + PCL_RCV_INTX);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t uniphier_pcie_msi_irq_handler(int irq, void *arg)
+{
+	struct pcie_port *pp = arg;
+
+	return dw_handle_msi_irq(pp);
+}
+
+static int uniphier_pcie_host_init(struct pcie_port *pp)
+{
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	int ret;
+
+	dw_pcie_setup_rc(pp);
+	ret = uniphier_pcie_establish_link(pci);
+	if (ret)
+		return ret;
+
+	if (IS_ENABLED(CONFIG_PCI_MSI))
+		dw_pcie_msi_init(pp);
+
+	return 0;
+}
+
+static const struct dw_pcie_host_ops uniphier_pcie_host_ops = {
+	.host_init = uniphier_pcie_host_init,
+};
+
+static int uniphier_add_pcie_port(struct uniphier_pcie_priv *priv,
+				  struct platform_device *pdev)
+{
+	struct dw_pcie *pci = &priv->pci;
+	struct pcie_port *pp = &pci->pp;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	pp->root_bus_nr = -1;
+	pp->ops = &uniphier_pcie_host_ops;
+
+	pp->irq = platform_get_irq_byname(pdev, "intx");
+	if (pp->irq < 0) {
+		dev_err(dev, "Failed to get intx irq\n");
+		return pp->irq;
+	}
+
+	ret = devm_request_irq(dev, pp->irq, uniphier_pcie_irq_handler,
+			       IRQF_SHARED, "pcie", priv);
+	if (ret) {
+		dev_err(dev, "Failed to request irq %d\n", pp->irq);
+		return ret;
+	}
+
+	ret = uniphier_pcie_init_irq_domain(pp);
+	if (ret)
+		return ret;
+
+	if (IS_ENABLED(CONFIG_PCI_MSI)) {
+		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
+		if (pp->msi_irq < 0)
+			return pp->msi_irq;
+
+		ret = devm_request_irq(dev, pp->msi_irq,
+				       uniphier_pcie_msi_irq_handler,
+				       IRQF_SHARED, "pcie-msi", pp);
+		if (ret) {
+			dev_err(dev, "failed to request msi_irq %d\n",
+				pp->msi_irq);
+			return ret;
+		}
+	}
+
+	ret = dw_pcie_host_init(pp);
+	if (ret) {
+		dev_err(dev, "Failed to initialize host (%d)\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int uniphier_pcie_host_enable(struct uniphier_pcie_priv *priv)
+{
+	int ret;
+
+	ret = clk_prepare_enable(priv->clk);
+	if (ret)
+		return ret;
+
+	ret = reset_control_deassert(priv->rst);
+	if (ret)
+		goto out_clk_disable;
+
+	uniphier_pcie_init_rc(priv);
+
+	ret = phy_init(priv->phy);
+	if (ret)
+		goto out_rst_assert;
+
+	ret = uniphier_pcie_wait_rc(priv);
+	if (ret)
+		goto out_phy_exit;
+
+	uniphier_pcie_irq_enable(priv);
+
+	return 0;
+
+out_phy_exit:
+	phy_exit(priv->phy);
+out_rst_assert:
+	reset_control_assert(priv->rst);
+out_clk_disable:
+	clk_disable_unprepare(priv->clk);
+
+	return ret;
+}
+
+static void uniphier_pcie_host_disable(struct uniphier_pcie_priv *priv)
+{
+	uniphier_pcie_irq_disable(priv);
+	phy_exit(priv->phy);
+	reset_control_assert(priv->rst);
+	clk_disable_unprepare(priv->clk);
+}
+
+static const struct dw_pcie_ops dw_pcie_ops = {
+	.start_link = uniphier_pcie_establish_link,
+	.stop_link = uniphier_pcie_stop_link,
+	.link_up = uniphier_pcie_link_up,
+};
+
+static int uniphier_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct uniphier_pcie_priv *priv;
+	struct resource *res;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->pci.dev = dev;
+	priv->pci.ops = &dw_pcie_ops;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
+	priv->pci.dbi_base = devm_pci_remap_cfg_resource(dev, res);
+	if (IS_ERR(priv->pci.dbi_base))
+		return PTR_ERR(priv->pci.dbi_base);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "link");
+	priv->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->base))
+		return PTR_ERR(priv->base);
+
+	priv->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(priv->clk))
+		return PTR_ERR(priv->clk);
+
+	priv->rst = devm_reset_control_get_shared(dev, NULL);
+	if (IS_ERR(priv->rst))
+		return PTR_ERR(priv->rst);
+
+	priv->phy = devm_phy_optional_get(dev, "pcie-phy");
+	if (IS_ERR(priv->phy))
+		return PTR_ERR(priv->phy);
+
+	platform_set_drvdata(pdev, priv);
+
+	ret = uniphier_pcie_host_enable(priv);
+	if (ret)
+		return ret;
+
+	return uniphier_add_pcie_port(priv, pdev);
+}
+
+static int uniphier_pcie_remove(struct platform_device *pdev)
+{
+	struct uniphier_pcie_priv *priv = platform_get_drvdata(pdev);
+
+	uniphier_pcie_host_disable(priv);
+
+	return 0;
+}
+
+static const struct of_device_id uniphier_pcie_match[] = {
+	{ .compatible = "socionext,uniphier-pcie", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, uniphier_pcie_match);
+
+static struct platform_driver uniphier_pcie_driver = {
+	.probe  = uniphier_pcie_probe,
+	.remove = uniphier_pcie_remove,
+	.driver = {
+		.name = "uniphier-pcie",
+		.of_match_table = uniphier_pcie_match,
+	},
+};
+builtin_platform_driver(uniphier_pcie_driver);
+
+MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>");
+MODULE_DESCRIPTION("UniPhier PCIe host controller driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

Re: [PATCH 1/2] dt-bindings: pci: add UniPhier PCIe host controller description

[Bjorn Helgaas]

Please follow the capitalization convention, i.e.,

  $ git log --oneline --no-merges Documentaon/devicetree/bindings/pci/ | grep -i pci
  82dfbd27c837 dt-bindings: PCI: cadence: Add DT bindings for optional PHYs
  92f9ccca4c08 PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver DT bindings
  71918e24cb49 dt-bindings: PCI: designware: Add support for EP in DesignWare driver
  467c7a737642 dt-bindings: PCI: designware: Example update
  1dca7a636933 dt-bindings: PCI: rockchip: Add DT bindings for Rockchip PCIe EP driver
  2ca25bd7472f dt-bindings: PCI: rockchip: Rename rockchip-pcie.txt to rockchip-pcie-host.txt

On Wed, Sep 05, 2018 at 11:32:10AM +0900, Kunihiko Hayashi wrote:
> Add DT bindings for PCIe controller implemented in UniPhier SoCs when
> configured in Root Complex (host) mode. This controller is based on
> the Designware PCIe Core.

s/Designware/DesignWare/
s/Core/core/

> 
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> ---
>  .../devicetree/bindings/pci/uniphier-pcie.txt      | 78 ++++++++++++++++++++++
>  1 file changed, 78 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> 
> diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> new file mode 100644
> index 0000000..ea63f78
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> @@ -0,0 +1,78 @@
> +Socionext UniPhier PCI-express host controller bindings

s/PCI-express/PCIe/ (also in other occurrences below)

> +
> +This describes the devicetree bindings for PCI-express host controller
> +implemented on Socionext UniPhier SoCs.
> +
> +UniPhier PCI-express host controller is based on the Synopsys DesignWare
> +PCI core. It shares common functions with the PCIe DesignWare core driver
> +and inherits common properties defined in
> +Documentation/devicetree/bindings/pci/designware-pcie.txt.

Re: [PATCH 1/2] dt-bindings: pci: add UniPhier PCIe host controller description

[Bjorn Helgaas]

Please follow the capitalization convention, i.e.,

  $ git log --oneline --no-merges Documentaon/devicetree/bindings/pci/ | grep -i pci
  82dfbd27c837 dt-bindings: PCI: cadence: Add DT bindings for optional PHYs
  92f9ccca4c08 PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver DT bindings
  71918e24cb49 dt-bindings: PCI: designware: Add support for EP in DesignWare driver
  467c7a737642 dt-bindings: PCI: designware: Example update
  1dca7a636933 dt-bindings: PCI: rockchip: Add DT bindings for Rockchip PCIe EP driver
  2ca25bd7472f dt-bindings: PCI: rockchip: Rename rockchip-pcie.txt to rockchip-pcie-host.txt

On Wed, Sep 05, 2018 at 11:32:10AM +0900, Kunihiko Hayashi wrote:
> Add DT bindings for PCIe controller implemented in UniPhier SoCs when
> configured in Root Complex (host) mode. This controller is based on
> the Designware PCIe Core.

s/Designware/DesignWare/
s/Core/core/

> 
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> ---
>  .../devicetree/bindings/pci/uniphier-pcie.txt      | 78 ++++++++++++++++++++++
>  1 file changed, 78 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> 
> diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> new file mode 100644
> index 0000000..ea63f78
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> @@ -0,0 +1,78 @@
> +Socionext UniPhier PCI-express host controller bindings

s/PCI-express/PCIe/ (also in other occurrences below)

> +
> +This describes the devicetree bindings for PCI-express host controller
> +implemented on Socionext UniPhier SoCs.
> +
> +UniPhier PCI-express host controller is based on the Synopsys DesignWare
> +PCI core. It shares common functions with the PCIe DesignWare core driver
> +and inherits common properties defined in
> +Documentation/devicetree/bindings/pci/designware-pcie.txt.

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[PATCH 1/2] dt-bindings: pci: add UniPhier PCIe host controller description

[Bjorn Helgaas]

Please follow the capitalization convention, i.e.,

  $ git log --oneline --no-merges Documentaon/devicetree/bindings/pci/ | grep -i pci
  82dfbd27c837 dt-bindings: PCI: cadence: Add DT bindings for optional PHYs
  92f9ccca4c08 PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver DT bindings
  71918e24cb49 dt-bindings: PCI: designware: Add support for EP in DesignWare driver
  467c7a737642 dt-bindings: PCI: designware: Example update
  1dca7a636933 dt-bindings: PCI: rockchip: Add DT bindings for Rockchip PCIe EP driver
  2ca25bd7472f dt-bindings: PCI: rockchip: Rename rockchip-pcie.txt to rockchip-pcie-host.txt

On Wed, Sep 05, 2018 at 11:32:10AM +0900, Kunihiko Hayashi wrote:
> Add DT bindings for PCIe controller implemented in UniPhier SoCs when
> configured in Root Complex (host) mode. This controller is based on
> the Designware PCIe Core.

s/Designware/DesignWare/
s/Core/core/

> 
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> ---
>  .../devicetree/bindings/pci/uniphier-pcie.txt      | 78 ++++++++++++++++++++++
>  1 file changed, 78 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> 
> diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> new file mode 100644
> index 0000000..ea63f78
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> @@ -0,0 +1,78 @@
> +Socionext UniPhier PCI-express host controller bindings

s/PCI-express/PCIe/ (also in other occurrences below)

> +
> +This describes the devicetree bindings for PCI-express host controller
> +implemented on Socionext UniPhier SoCs.
> +
> +UniPhier PCI-express host controller is based on the Synopsys DesignWare
> +PCI core. It shares common functions with the PCIe DesignWare core driver
> +and inherits common properties defined in
> +Documentation/devicetree/bindings/pci/designware-pcie.txt.

Re: [PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Bjorn Helgaas]

Follow capitalization conventions for subject.

On Wed, Sep 05, 2018 at 11:32:11AM +0900, Kunihiko Hayashi wrote:
> This introduces specific glue layer for UniPhier platform to support
> PCIe host controller that is based on the Designware PCIe Core, and
> this driver supports Root Complex (host) mode.

s/Designware/DesignWare/
s/Core/core/

> diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
> new file mode 100644
> index 0000000..13ce02e
> --- /dev/null
> +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> @@ -0,0 +1,464 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// PCI-express host controller driver for UniPhier SoCs
> +// Copyright 2018 Socionext Inc.
> +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>

Use /* ... */ comments except for the SPDX line.

Re: [PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Bjorn Helgaas]

Follow capitalization conventions for subject.

On Wed, Sep 05, 2018 at 11:32:11AM +0900, Kunihiko Hayashi wrote:
> This introduces specific glue layer for UniPhier platform to support
> PCIe host controller that is based on the Designware PCIe Core, and
> this driver supports Root Complex (host) mode.

s/Designware/DesignWare/
s/Core/core/

> diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
> new file mode 100644
> index 0000000..13ce02e
> --- /dev/null
> +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> @@ -0,0 +1,464 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// PCI-express host controller driver for UniPhier SoCs
> +// Copyright 2018 Socionext Inc.
> +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>

Use /* ... */ comments except for the SPDX line.


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[PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Bjorn Helgaas]

Follow capitalization conventions for subject.

On Wed, Sep 05, 2018 at 11:32:11AM +0900, Kunihiko Hayashi wrote:
> This introduces specific glue layer for UniPhier platform to support
> PCIe host controller that is based on the Designware PCIe Core, and
> this driver supports Root Complex (host) mode.

s/Designware/DesignWare/
s/Core/core/

> diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
> new file mode 100644
> index 0000000..13ce02e
> --- /dev/null
> +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> @@ -0,0 +1,464 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// PCI-express host controller driver for UniPhier SoCs
> +// Copyright 2018 Socionext Inc.
> +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>

Use /* ... */ comments except for the SPDX line.

Re: [PATCH 1/2] dt-bindings: pci: add UniPhier PCIe host controller description

[Kunihiko Hayashi]

Hi Bjorn,

Thank you for reviewing.

On Wed, 5 Sep 2018 12:21:18 -0500 <helgaas@kernel.org> wrote:

> 
> Please follow the capitalization convention, i.e.,
> 
>   $ git log --oneline --no-merges Documentaon/devicetree/bindings/pci/ | grep -i pci
>   82dfbd27c837 dt-bindings: PCI: cadence: Add DT bindings for optional PHYs
>   92f9ccca4c08 PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver DT bindings
>   71918e24cb49 dt-bindings: PCI: designware: Add support for EP in DesignWare driver
>   467c7a737642 dt-bindings: PCI: designware: Example update
>   1dca7a636933 dt-bindings: PCI: rockchip: Add DT bindings for Rockchip PCIe EP driver
>   2ca25bd7472f dt-bindings: PCI: rockchip: Rename rockchip-pcie.txt to rockchip-pcie-host.txt
> 
> On Wed, Sep 05, 2018 at 11:32:10AM +0900, Kunihiko Hayashi wrote:
> > Add DT bindings for PCIe controller implemented in UniPhier SoCs when
> > configured in Root Complex (host) mode. This controller is based on
> > the Designware PCIe Core.
> 
> s/Designware/DesignWare/
> s/Core/core/

Okay, I'll fix capitalization conventions in all the descriptions
according to the previous commits.

> > 
> > Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> > ---
> >  .../devicetree/bindings/pci/uniphier-pcie.txt      | 78 ++++++++++++++++++++++
> >  1 file changed, 78 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> > new file mode 100644
> > index 0000000..ea63f78
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> > @@ -0,0 +1,78 @@
> > +Socionext UniPhier PCI-express host controller bindings
> 
> s/PCI-express/PCIe/ (also in other occurrences below)
>
> > +
> > +This describes the devicetree bindings for PCI-express host controller
> > +implemented on Socionext UniPhier SoCs.
> > +
> > +UniPhier PCI-express host controller is based on the Synopsys DesignWare
> > +PCI core. It shares common functions with the PCIe DesignWare core driver
> > +and inherits common properties defined in
> > +Documentation/devicetree/bindings/pci/designware-pcie.txt.

Indeed, there are descriptions of inconsistency. I'll fix them.

Thank you,

---
Best Regards,
Kunihiko Hayashi

[PATCH 1/2] dt-bindings: pci: add UniPhier PCIe host controller description

[Kunihiko Hayashi]

Hi Bjorn,

Thank you for reviewing.

On Wed, 5 Sep 2018 12:21:18 -0500 <helgaas@kernel.org> wrote:

> 
> Please follow the capitalization convention, i.e.,
> 
>   $ git log --oneline --no-merges Documentaon/devicetree/bindings/pci/ | grep -i pci
>   82dfbd27c837 dt-bindings: PCI: cadence: Add DT bindings for optional PHYs
>   92f9ccca4c08 PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver DT bindings
>   71918e24cb49 dt-bindings: PCI: designware: Add support for EP in DesignWare driver
>   467c7a737642 dt-bindings: PCI: designware: Example update
>   1dca7a636933 dt-bindings: PCI: rockchip: Add DT bindings for Rockchip PCIe EP driver
>   2ca25bd7472f dt-bindings: PCI: rockchip: Rename rockchip-pcie.txt to rockchip-pcie-host.txt
> 
> On Wed, Sep 05, 2018 at 11:32:10AM +0900, Kunihiko Hayashi wrote:
> > Add DT bindings for PCIe controller implemented in UniPhier SoCs when
> > configured in Root Complex (host) mode. This controller is based on
> > the Designware PCIe Core.
> 
> s/Designware/DesignWare/
> s/Core/core/

Okay, I'll fix capitalization conventions in all the descriptions
according to the previous commits.

> > 
> > Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> > ---
> >  .../devicetree/bindings/pci/uniphier-pcie.txt      | 78 ++++++++++++++++++++++
> >  1 file changed, 78 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/pci/uniphier-pcie.txt b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> > new file mode 100644
> > index 0000000..ea63f78
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pci/uniphier-pcie.txt
> > @@ -0,0 +1,78 @@
> > +Socionext UniPhier PCI-express host controller bindings
> 
> s/PCI-express/PCIe/ (also in other occurrences below)
>
> > +
> > +This describes the devicetree bindings for PCI-express host controller
> > +implemented on Socionext UniPhier SoCs.
> > +
> > +UniPhier PCI-express host controller is based on the Synopsys DesignWare
> > +PCI core. It shares common functions with the PCIe DesignWare core driver
> > +and inherits common properties defined in
> > +Documentation/devicetree/bindings/pci/designware-pcie.txt.

Indeed, there are descriptions of inconsistency. I'll fix them.

Thank you,

---
Best Regards,
Kunihiko Hayashi

Re: [PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Kunihiko Hayashi]

Hi Bjorn,

On Wed, 5 Sep 2018 12:25:29 -0500 <helgaas@kernel.org> wrote:

> Follow capitalization conventions for subject.
> 
> On Wed, Sep 05, 2018 at 11:32:11AM +0900, Kunihiko Hayashi wrote:
> > This introduces specific glue layer for UniPhier platform to support
> > PCIe host controller that is based on the Designware PCIe Core, and
> > this driver supports Root Complex (host) mode.
> 
> s/Designware/DesignWare/
> s/Core/core/

I'll fix them like [1/2].

> 
> > diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
> > new file mode 100644
> > index 0000000..13ce02e
> > --- /dev/null
> > +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> > @@ -0,0 +1,464 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +//
> > +// PCI-express host controller driver for UniPhier SoCs
> > +// Copyright 2018 Socionext Inc.
> > +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> 
> Use /* ... */ comments except for the SPDX line.

Okay, although I wondered which way to put, I'll replace the header next.

Thank you,

---
Best Regards,
Kunihiko Hayashi

[PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Kunihiko Hayashi]

Hi Bjorn,

On Wed, 5 Sep 2018 12:25:29 -0500 <helgaas@kernel.org> wrote:

> Follow capitalization conventions for subject.
> 
> On Wed, Sep 05, 2018 at 11:32:11AM +0900, Kunihiko Hayashi wrote:
> > This introduces specific glue layer for UniPhier platform to support
> > PCIe host controller that is based on the Designware PCIe Core, and
> > this driver supports Root Complex (host) mode.
> 
> s/Designware/DesignWare/
> s/Core/core/

I'll fix them like [1/2].

> 
> > diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
> > new file mode 100644
> > index 0000000..13ce02e
> > --- /dev/null
> > +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> > @@ -0,0 +1,464 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +//
> > +// PCI-express host controller driver for UniPhier SoCs
> > +// Copyright 2018 Socionext Inc.
> > +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> 
> Use /* ... */ comments except for the SPDX line.

Okay, although I wondered which way to put, I'll replace the header next.

Thank you,

---
Best Regards,
Kunihiko Hayashi

Re: [PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Bjorn Helgaas]

On Thu, Sep 06, 2018 at 10:38:20AM +0900, Kunihiko Hayashi wrote:
> > > +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> > > @@ -0,0 +1,464 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +//
> > > +// PCI-express host controller driver for UniPhier SoCs
> > > +// Copyright 2018 Socionext Inc.
> > > +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> > 
> > Use /* ... */ comments except for the SPDX line.
> 
> Okay, although I wondered which way to put, I'll replace the header next.

The easiest thing is to look at similar files already in the tree and
follow their style.  The details are here:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst#n540
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/license-rules.rst#n74

Re: [PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Bjorn Helgaas]

On Thu, Sep 06, 2018 at 10:38:20AM +0900, Kunihiko Hayashi wrote:
> > > +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> > > @@ -0,0 +1,464 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +//
> > > +// PCI-express host controller driver for UniPhier SoCs
> > > +// Copyright 2018 Socionext Inc.
> > > +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> > 
> > Use /* ... */ comments except for the SPDX line.
> 
> Okay, although I wondered which way to put, I'll replace the header next.

The easiest thing is to look at similar files already in the tree and
follow their style.  The details are here:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst#n540
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/license-rules.rst#n74

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[PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Bjorn Helgaas]

On Thu, Sep 06, 2018 at 10:38:20AM +0900, Kunihiko Hayashi wrote:
> > > +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> > > @@ -0,0 +1,464 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +//
> > > +// PCI-express host controller driver for UniPhier SoCs
> > > +// Copyright 2018 Socionext Inc.
> > > +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> > 
> > Use /* ... */ comments except for the SPDX line.
> 
> Okay, although I wondered which way to put, I'll replace the header next.

The easiest thing is to look at similar files already in the tree and
follow their style.  The details are here:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst#n540
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/license-rules.rst#n74

Re: [PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Kunihiko Hayashi]

Hi Bjorn,

On Thu, 6 Sep 2018 09:09:27 -0500 <helgaas@kernel.org> wrote:

> On Thu, Sep 06, 2018 at 10:38:20AM +0900, Kunihiko Hayashi wrote:
> > > > +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> > > > @@ -0,0 +1,464 @@
> > > > +// SPDX-License-Identifier: GPL-2.0
> > > > +//
> > > > +// PCI-express host controller driver for UniPhier SoCs
> > > > +// Copyright 2018 Socionext Inc.
> > > > +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> > > 
> > > Use /* ... */ comments except for the SPDX line.
> > 
> > Okay, although I wondered which way to put, I'll replace the header next.
> 
> The easiest thing is to look at similar files already in the tree and
> follow their style.  The details are here:
> 
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst#n540
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/license-rules.rst#n74

Thanks for your advice.
Although I've found both styles in some sub-systems, these are helpful for me.

I replaced it in posted v2.

Thank you,

---
Best Regards,
Kunihiko Hayashi

Re: [PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Kunihiko Hayashi]

Hi Bjorn,

On Thu, 6 Sep 2018 09:09:27 -0500 <helgaas@kernel.org> wrote:

> On Thu, Sep 06, 2018 at 10:38:20AM +0900, Kunihiko Hayashi wrote:
> > > > +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> > > > @@ -0,0 +1,464 @@
> > > > +// SPDX-License-Identifier: GPL-2.0
> > > > +//
> > > > +// PCI-express host controller driver for UniPhier SoCs
> > > > +// Copyright 2018 Socionext Inc.
> > > > +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> > > 
> > > Use /* ... */ comments except for the SPDX line.
> > 
> > Okay, although I wondered which way to put, I'll replace the header next.
> 
> The easiest thing is to look at similar files already in the tree and
> follow their style.  The details are here:
> 
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst#n540
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/license-rules.rst#n74

Thanks for your advice.
Although I've found both styles in some sub-systems, these are helpful for me.

I replaced it in posted v2.

Thank you,

---
Best Regards,
Kunihiko Hayashi

[PATCH 2/2] pci: dwc: add UniPhier PCIe host controller support

[Kunihiko Hayashi]

Hi Bjorn,

On Thu, 6 Sep 2018 09:09:27 -0500 <helgaas@kernel.org> wrote:

> On Thu, Sep 06, 2018 at 10:38:20AM +0900, Kunihiko Hayashi wrote:
> > > > +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> > > > @@ -0,0 +1,464 @@
> > > > +// SPDX-License-Identifier: GPL-2.0
> > > > +//
> > > > +// PCI-express host controller driver for UniPhier SoCs
> > > > +// Copyright 2018 Socionext Inc.
> > > > +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
> > > 
> > > Use /* ... */ comments except for the SPDX line.
> > 
> > Okay, although I wondered which way to put, I'll replace the header next.
> 
> The easiest thing is to look at similar files already in the tree and
> follow their style.  The details are here:
> 
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst#n540
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/license-rules.rst#n74

Thanks for your advice.
Although I've found both styles in some sub-systems, these are helpful for me.

I replaced it in posted v2.

Thank you,

---
Best Regards,
Kunihiko Hayashi