[PATCH 0/3] PCI: dwc: Visoconti: PCIe RC controller driver

[PATCH 0/3] PCI: dwc: Visoconti: PCIe RC controller driver

[Nobuhiro Iwamatsu]

Hi,

This series is the PCIe driver for Toshiba's ARM SoC, Visconti[0].
This provides DT binding documentation, device driver, MAINTAINER files.

Best regards,
  Nobuhiro

[0]: https://toshiba.semicon-storage.com/ap-en/semiconductor/product/image-recognition-processors-visconti.html

Nobuhiro Iwamatsu (3):
  dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller
  PCI: dwc: Visoconti: PCIe RC controller driver
  MAINTAINERS: Add entries for Toshiba Visconti PCIe controller

 .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++
 MAINTAINERS                                   |   2 +
 drivers/pci/controller/dwc/Kconfig            |  10 +
 drivers/pci/controller/dwc/Makefile           |   1 +
 drivers/pci/controller/dwc/pcie-visconti.c    | 358 ++++++++++++++++++
 5 files changed, 492 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
 create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c

-- 
2.30.0.rc2

[PATCH 0/3] PCI: dwc: Visoconti: PCIe RC controller driver

[Nobuhiro Iwamatsu]

Hi,

This series is the PCIe driver for Toshiba's ARM SoC, Visconti[0].
This provides DT binding documentation, device driver, MAINTAINER files.

Best regards,
  Nobuhiro

[0]: https://toshiba.semicon-storage.com/ap-en/semiconductor/product/image-recognition-processors-visconti.html

Nobuhiro Iwamatsu (3):
  dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller
  PCI: dwc: Visoconti: PCIe RC controller driver
  MAINTAINERS: Add entries for Toshiba Visconti PCIe controller

 .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++
 MAINTAINERS                                   |   2 +
 drivers/pci/controller/dwc/Kconfig            |  10 +
 drivers/pci/controller/dwc/Makefile           |   1 +
 drivers/pci/controller/dwc/pcie-visconti.c    | 358 ++++++++++++++++++
 5 files changed, 492 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
 create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c

-- 
2.30.0.rc2

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[PATCH 1/3] dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller

[Nobuhiro Iwamatsu]

This commit adds the Device Tree binding documentation that allows
to describe the PCIe controller found in Toshiba Visconti SoCs.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
---
 .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml

diff --git a/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
new file mode 100644
index 000000000000..8ab60c235007
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
@@ -0,0 +1,121 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/toshiba,visconti-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Toshiba Visconti5 SoC PCIe Host Controller Device Tree Bindings
+
+maintainers:
+  - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+
+description: |+
+  Toshiba Visconti5 SoC PCIe host controller is based on the Synopsys DesignWare PCIe IP.
+
+allOf:
+  - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+  compatible:
+    const: toshiba,visconti-pcie
+
+  reg:
+    items:
+      - description: Data Bus Interface (DBI) registers.
+      - description: PCIe configuration space region.
+      - description: Visconti specific additional registers.
+      - description: Visconti specific SMU registers
+      - description: Visconti specific memory protection unit registers (MPU)
+
+  reg-names:
+    items:
+      - const: dbi
+      - const: config
+      - const: ulreg
+      - const: smu
+      - const: mpu
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: PCIe reference clock
+      - description: PCIe system clock
+      - description: Auxiliary clock
+
+  clock-names:
+    items:
+      - const: pcie_refclk
+      - const: sysclk
+      - const: auxclk
+
+  num-lanes:
+    const: 2
+
+  num-viewport:
+    const: 8
+
+required:
+  - reg
+  - reg-names
+  - interrupts
+  - "#address-cells"
+  - "#size-cells"
+  - "#interrupt-cells"
+  - interrupt-map
+  - interrupt-map-mask
+  - ranges
+  - bus-range
+  - device_type
+  - num-lanes
+  - num-viewport
+  - clocks
+  - clock-names
+  - max-link-speed
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pcie: pcie@28400000 {
+            compatible = "toshiba,visconti-pcie";
+            reg = <0x0 0x28400000 0x0 0x00400000>,
+                  <0x0 0x70000000 0x0 0x10000000>,
+                  <0x0 0x28050000 0x0 0x00010000>,
+                  <0x0 0x24200000 0x0 0x00002000>,
+                  <0x0 0x24162000 0x0 0x00001000>;
+            reg-names  = "dbi", "config", "ulreg", "smu", "mpu";
+            device_type = "pci";
+            bus-range = <0x00 0xff>;
+            num-lanes = <2>;
+            num-viewport = <8>;
+
+            #address-cells = <3>;
+            #size-cells = <2>;
+            #interrupt-cells = <1>;
+            ranges = <0x81000000 0 0x40000000 0 0x40000000 0 0x00010000>,
+                     <0x82000000 0 0x50000000 0 0x50000000 0 0x20000000>;
+            interrupts = <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-names = "intr";
+            interrupt-map-mask = <0 0 0 7>;
+            interrupt-map =
+                <0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
+                 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
+                 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
+                 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&extclk100mhz>, <&clk600mhz>, <&clk25mhz>;
+            clock-names = "pcie_refclk", "sysclk", "auxclk";
+            max-link-speed = <2>;
+
+            status = "disabled";
+        };
+    };
+...
-- 
2.30.0.rc2

[PATCH 1/3] dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller

[Nobuhiro Iwamatsu]

This commit adds the Device Tree binding documentation that allows
to describe the PCIe controller found in Toshiba Visconti SoCs.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
---
 .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml

diff --git a/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
new file mode 100644
index 000000000000..8ab60c235007
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
@@ -0,0 +1,121 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/toshiba,visconti-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Toshiba Visconti5 SoC PCIe Host Controller Device Tree Bindings
+
+maintainers:
+  - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+
+description: |+
+  Toshiba Visconti5 SoC PCIe host controller is based on the Synopsys DesignWare PCIe IP.
+
+allOf:
+  - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+  compatible:
+    const: toshiba,visconti-pcie
+
+  reg:
+    items:
+      - description: Data Bus Interface (DBI) registers.
+      - description: PCIe configuration space region.
+      - description: Visconti specific additional registers.
+      - description: Visconti specific SMU registers
+      - description: Visconti specific memory protection unit registers (MPU)
+
+  reg-names:
+    items:
+      - const: dbi
+      - const: config
+      - const: ulreg
+      - const: smu
+      - const: mpu
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: PCIe reference clock
+      - description: PCIe system clock
+      - description: Auxiliary clock
+
+  clock-names:
+    items:
+      - const: pcie_refclk
+      - const: sysclk
+      - const: auxclk
+
+  num-lanes:
+    const: 2
+
+  num-viewport:
+    const: 8
+
+required:
+  - reg
+  - reg-names
+  - interrupts
+  - "#address-cells"
+  - "#size-cells"
+  - "#interrupt-cells"
+  - interrupt-map
+  - interrupt-map-mask
+  - ranges
+  - bus-range
+  - device_type
+  - num-lanes
+  - num-viewport
+  - clocks
+  - clock-names
+  - max-link-speed
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pcie: pcie@28400000 {
+            compatible = "toshiba,visconti-pcie";
+            reg = <0x0 0x28400000 0x0 0x00400000>,
+                  <0x0 0x70000000 0x0 0x10000000>,
+                  <0x0 0x28050000 0x0 0x00010000>,
+                  <0x0 0x24200000 0x0 0x00002000>,
+                  <0x0 0x24162000 0x0 0x00001000>;
+            reg-names  = "dbi", "config", "ulreg", "smu", "mpu";
+            device_type = "pci";
+            bus-range = <0x00 0xff>;
+            num-lanes = <2>;
+            num-viewport = <8>;
+
+            #address-cells = <3>;
+            #size-cells = <2>;
+            #interrupt-cells = <1>;
+            ranges = <0x81000000 0 0x40000000 0 0x40000000 0 0x00010000>,
+                     <0x82000000 0 0x50000000 0 0x50000000 0 0x20000000>;
+            interrupts = <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-names = "intr";
+            interrupt-map-mask = <0 0 0 7>;
+            interrupt-map =
+                <0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
+                 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
+                 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
+                 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&extclk100mhz>, <&clk600mhz>, <&clk25mhz>;
+            clock-names = "pcie_refclk", "sysclk", "auxclk";
+            max-link-speed = <2>;
+
+            status = "disabled";
+        };
+    };
+...
-- 
2.30.0.rc2


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linux-arm-kernel mailing list
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Re: [PATCH 1/3] dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller

[Rob Herring]

On Tue, Apr 6, 2021 at 10:19 PM Nobuhiro Iwamatsu
<nobuhiro1.iwamatsu@toshiba.co.jp> wrote:
>
> This commit adds the Device Tree binding documentation that allows
> to describe the PCIe controller found in Toshiba Visconti SoCs.
>
> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> ---
>  .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++++++++++++++
>  1 file changed, 121 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
>
> diff --git a/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> new file mode 100644
> index 000000000000..8ab60c235007
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> @@ -0,0 +1,121 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/toshiba,visconti-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Toshiba Visconti5 SoC PCIe Host Controller Device Tree Bindings
> +
> +maintainers:
> +  - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> +
> +description: |+
> +  Toshiba Visconti5 SoC PCIe host controller is based on the Synopsys DesignWare PCIe IP.
> +
> +allOf:
> +  - $ref: /schemas/pci/pci-bus.yaml#
> +
> +properties:
> +  compatible:
> +    const: toshiba,visconti-pcie
> +
> +  reg:
> +    items:
> +      - description: Data Bus Interface (DBI) registers.
> +      - description: PCIe configuration space region.
> +      - description: Visconti specific additional registers.
> +      - description: Visconti specific SMU registers
> +      - description: Visconti specific memory protection unit registers (MPU)
> +
> +  reg-names:
> +    items:
> +      - const: dbi
> +      - const: config
> +      - const: ulreg
> +      - const: smu
> +      - const: mpu
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PCIe reference clock
> +      - description: PCIe system clock
> +      - description: Auxiliary clock
> +
> +  clock-names:
> +    items:
> +      - const: pcie_refclk
> +      - const: sysclk
> +      - const: auxclk
> +
> +  num-lanes:
> +    const: 2
> +
> +  num-viewport:
> +    const: 8

Drop this, we detect this now.

> +
> +required:

Drop everything that pci-bus.yaml already requires.

> +  - reg
> +  - reg-names
> +  - interrupts
> +  - "#address-cells"
> +  - "#size-cells"
> +  - "#interrupt-cells"
> +  - interrupt-map
> +  - interrupt-map-mask
> +  - ranges
> +  - bus-range

If you support 0-0xff, there's no need for this to be required.

> +  - device_type
> +  - num-lanes
> +  - num-viewport
> +  - clocks
> +  - clock-names
> +  - max-link-speed
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        pcie: pcie@28400000 {
> +            compatible = "toshiba,visconti-pcie";
> +            reg = <0x0 0x28400000 0x0 0x00400000>,
> +                  <0x0 0x70000000 0x0 0x10000000>,
> +                  <0x0 0x28050000 0x0 0x00010000>,
> +                  <0x0 0x24200000 0x0 0x00002000>,
> +                  <0x0 0x24162000 0x0 0x00001000>;
> +            reg-names  = "dbi", "config", "ulreg", "smu", "mpu";
> +            device_type = "pci";
> +            bus-range = <0x00 0xff>;
> +            num-lanes = <2>;
> +            num-viewport = <8>;
> +
> +            #address-cells = <3>;
> +            #size-cells = <2>;
> +            #interrupt-cells = <1>;
> +            ranges = <0x81000000 0 0x40000000 0 0x40000000 0 0x00010000>,
> +                     <0x82000000 0 0x50000000 0 0x50000000 0 0x20000000>;
> +            interrupts = <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> +            interrupt-names = "intr";
> +            interrupt-map-mask = <0 0 0 7>;
> +            interrupt-map =
> +                <0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&extclk100mhz>, <&clk600mhz>, <&clk25mhz>;
> +            clock-names = "pcie_refclk", "sysclk", "auxclk";
> +            max-link-speed = <2>;
> +
> +            status = "disabled";

Don't show status in examples.

> +        };
> +    };
> +...
> --
> 2.30.0.rc2
>

Re: [PATCH 1/3] dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller

[Rob Herring]

On Tue, Apr 6, 2021 at 10:19 PM Nobuhiro Iwamatsu
<nobuhiro1.iwamatsu@toshiba.co.jp> wrote:
>
> This commit adds the Device Tree binding documentation that allows
> to describe the PCIe controller found in Toshiba Visconti SoCs.
>
> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> ---
>  .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++++++++++++++
>  1 file changed, 121 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
>
> diff --git a/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> new file mode 100644
> index 000000000000..8ab60c235007
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> @@ -0,0 +1,121 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/toshiba,visconti-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Toshiba Visconti5 SoC PCIe Host Controller Device Tree Bindings
> +
> +maintainers:
> +  - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> +
> +description: |+
> +  Toshiba Visconti5 SoC PCIe host controller is based on the Synopsys DesignWare PCIe IP.
> +
> +allOf:
> +  - $ref: /schemas/pci/pci-bus.yaml#
> +
> +properties:
> +  compatible:
> +    const: toshiba,visconti-pcie
> +
> +  reg:
> +    items:
> +      - description: Data Bus Interface (DBI) registers.
> +      - description: PCIe configuration space region.
> +      - description: Visconti specific additional registers.
> +      - description: Visconti specific SMU registers
> +      - description: Visconti specific memory protection unit registers (MPU)
> +
> +  reg-names:
> +    items:
> +      - const: dbi
> +      - const: config
> +      - const: ulreg
> +      - const: smu
> +      - const: mpu
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PCIe reference clock
> +      - description: PCIe system clock
> +      - description: Auxiliary clock
> +
> +  clock-names:
> +    items:
> +      - const: pcie_refclk
> +      - const: sysclk
> +      - const: auxclk
> +
> +  num-lanes:
> +    const: 2
> +
> +  num-viewport:
> +    const: 8

Drop this, we detect this now.

> +
> +required:

Drop everything that pci-bus.yaml already requires.

> +  - reg
> +  - reg-names
> +  - interrupts
> +  - "#address-cells"
> +  - "#size-cells"
> +  - "#interrupt-cells"
> +  - interrupt-map
> +  - interrupt-map-mask
> +  - ranges
> +  - bus-range

If you support 0-0xff, there's no need for this to be required.

> +  - device_type
> +  - num-lanes
> +  - num-viewport
> +  - clocks
> +  - clock-names
> +  - max-link-speed
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        pcie: pcie@28400000 {
> +            compatible = "toshiba,visconti-pcie";
> +            reg = <0x0 0x28400000 0x0 0x00400000>,
> +                  <0x0 0x70000000 0x0 0x10000000>,
> +                  <0x0 0x28050000 0x0 0x00010000>,
> +                  <0x0 0x24200000 0x0 0x00002000>,
> +                  <0x0 0x24162000 0x0 0x00001000>;
> +            reg-names  = "dbi", "config", "ulreg", "smu", "mpu";
> +            device_type = "pci";
> +            bus-range = <0x00 0xff>;
> +            num-lanes = <2>;
> +            num-viewport = <8>;
> +
> +            #address-cells = <3>;
> +            #size-cells = <2>;
> +            #interrupt-cells = <1>;
> +            ranges = <0x81000000 0 0x40000000 0 0x40000000 0 0x00010000>,
> +                     <0x82000000 0 0x50000000 0 0x50000000 0 0x20000000>;
> +            interrupts = <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> +            interrupt-names = "intr";
> +            interrupt-map-mask = <0 0 0 7>;
> +            interrupt-map =
> +                <0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> +                 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&extclk100mhz>, <&clk600mhz>, <&clk25mhz>;
> +            clock-names = "pcie_refclk", "sysclk", "auxclk";
> +            max-link-speed = <2>;
> +
> +            status = "disabled";

Don't show status in examples.

> +        };
> +    };
> +...
> --
> 2.30.0.rc2
>

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Re: [PATCH 1/3] dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller

[Nobuhiro Iwamatsu]

Hi,

Thanks for your review.

On Wed, Apr 07, 2021 at 08:18:58AM -0500, Rob Herring wrote:
> On Tue, Apr 6, 2021 at 10:19 PM Nobuhiro Iwamatsu
> <nobuhiro1.iwamatsu@toshiba.co.jp> wrote:
> >
> > This commit adds the Device Tree binding documentation that allows
> > to describe the PCIe controller found in Toshiba Visconti SoCs.
> >
> > Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> > ---
> >  .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++++++++++++++
> >  1 file changed, 121 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> > new file mode 100644
> > index 000000000000..8ab60c235007
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> > @@ -0,0 +1,121 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/pci/toshiba,visconti-pcie.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Toshiba Visconti5 SoC PCIe Host Controller Device Tree Bindings
> > +
> > +maintainers:
> > +  - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> > +
> > +description: |+
> > +  Toshiba Visconti5 SoC PCIe host controller is based on the Synopsys DesignWare PCIe IP.
> > +
> > +allOf:
> > +  - $ref: /schemas/pci/pci-bus.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    const: toshiba,visconti-pcie
> > +
> > +  reg:
> > +    items:
> > +      - description: Data Bus Interface (DBI) registers.
> > +      - description: PCIe configuration space region.
> > +      - description: Visconti specific additional registers.
> > +      - description: Visconti specific SMU registers
> > +      - description: Visconti specific memory protection unit registers (MPU)
> > +
> > +  reg-names:
> > +    items:
> > +      - const: dbi
> > +      - const: config
> > +      - const: ulreg
> > +      - const: smu
> > +      - const: mpu
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +      - description: PCIe reference clock
> > +      - description: PCIe system clock
> > +      - description: Auxiliary clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: pcie_refclk
> > +      - const: sysclk
> > +      - const: auxclk
> > +
> > +  num-lanes:
> > +    const: 2
> > +
> > +  num-viewport:
> > +    const: 8
> 
> Drop this, we detect this now.
> 

OK, I will drop this.

> > +
> > +required:
> 
> Drop everything that pci-bus.yaml already requires.

OK, I will check pci-bus.yaml, and update this.

> 
> > +  - reg
> > +  - reg-names
> > +  - interrupts
> > +  - "#address-cells"
> > +  - "#size-cells"
> > +  - "#interrupt-cells"
> > +  - interrupt-map
> > +  - interrupt-map-mask
> > +  - ranges
> > +  - bus-range
> 
> If you support 0-0xff, there's no need for this to be required.
> 

OK, this device supports 0x0 -0xff, I will drop.

> > +  - device_type
> > +  - num-lanes
> > +  - num-viewport
> > +  - clocks
> > +  - clock-names
> > +  - max-link-speed
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +
> > +    soc {
> > +        #address-cells = <2>;
> > +        #size-cells = <2>;
> > +
> > +        pcie: pcie@28400000 {
> > +            compatible = "toshiba,visconti-pcie";
> > +            reg = <0x0 0x28400000 0x0 0x00400000>,
> > +                  <0x0 0x70000000 0x0 0x10000000>,
> > +                  <0x0 0x28050000 0x0 0x00010000>,
> > +                  <0x0 0x24200000 0x0 0x00002000>,
> > +                  <0x0 0x24162000 0x0 0x00001000>;
> > +            reg-names  = "dbi", "config", "ulreg", "smu", "mpu";
> > +            device_type = "pci";
> > +            bus-range = <0x00 0xff>;
> > +            num-lanes = <2>;
> > +            num-viewport = <8>;
> > +
> > +            #address-cells = <3>;
> > +            #size-cells = <2>;
> > +            #interrupt-cells = <1>;
> > +            ranges = <0x81000000 0 0x40000000 0 0x40000000 0 0x00010000>,
> > +                     <0x82000000 0 0x50000000 0 0x50000000 0 0x20000000>;
> > +            interrupts = <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> > +            interrupt-names = "intr";
> > +            interrupt-map-mask = <0 0 0 7>;
> > +            interrupt-map =
> > +                <0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> > +                 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> > +                 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> > +                 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> > +            clocks = <&extclk100mhz>, <&clk600mhz>, <&clk25mhz>;
> > +            clock-names = "pcie_refclk", "sysclk", "auxclk";
> > +            max-link-speed = <2>;
> > +
> > +            status = "disabled";
> 
> Don't show status in examples.

OK, I will drop.

> 
> > +        };
> > +    };
> > +...
> > --
> > 2.30.0.rc2
> >
> 

Best regards,
  Nobuhiro

Re: [PATCH 1/3] dt-bindings: pci: Add DT binding for Toshiba Visconti PCIe controller

[Nobuhiro Iwamatsu]

Hi,

Thanks for your review.

On Wed, Apr 07, 2021 at 08:18:58AM -0500, Rob Herring wrote:
> On Tue, Apr 6, 2021 at 10:19 PM Nobuhiro Iwamatsu
> <nobuhiro1.iwamatsu@toshiba.co.jp> wrote:
> >
> > This commit adds the Device Tree binding documentation that allows
> > to describe the PCIe controller found in Toshiba Visconti SoCs.
> >
> > Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> > ---
> >  .../bindings/pci/toshiba,visconti-pcie.yaml   | 121 ++++++++++++++++++
> >  1 file changed, 121 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> > new file mode 100644
> > index 000000000000..8ab60c235007
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
> > @@ -0,0 +1,121 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/pci/toshiba,visconti-pcie.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Toshiba Visconti5 SoC PCIe Host Controller Device Tree Bindings
> > +
> > +maintainers:
> > +  - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> > +
> > +description: |+
> > +  Toshiba Visconti5 SoC PCIe host controller is based on the Synopsys DesignWare PCIe IP.
> > +
> > +allOf:
> > +  - $ref: /schemas/pci/pci-bus.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    const: toshiba,visconti-pcie
> > +
> > +  reg:
> > +    items:
> > +      - description: Data Bus Interface (DBI) registers.
> > +      - description: PCIe configuration space region.
> > +      - description: Visconti specific additional registers.
> > +      - description: Visconti specific SMU registers
> > +      - description: Visconti specific memory protection unit registers (MPU)
> > +
> > +  reg-names:
> > +    items:
> > +      - const: dbi
> > +      - const: config
> > +      - const: ulreg
> > +      - const: smu
> > +      - const: mpu
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +      - description: PCIe reference clock
> > +      - description: PCIe system clock
> > +      - description: Auxiliary clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: pcie_refclk
> > +      - const: sysclk
> > +      - const: auxclk
> > +
> > +  num-lanes:
> > +    const: 2
> > +
> > +  num-viewport:
> > +    const: 8
> 
> Drop this, we detect this now.
> 

OK, I will drop this.

> > +
> > +required:
> 
> Drop everything that pci-bus.yaml already requires.

OK, I will check pci-bus.yaml, and update this.

> 
> > +  - reg
> > +  - reg-names
> > +  - interrupts
> > +  - "#address-cells"
> > +  - "#size-cells"
> > +  - "#interrupt-cells"
> > +  - interrupt-map
> > +  - interrupt-map-mask
> > +  - ranges
> > +  - bus-range
> 
> If you support 0-0xff, there's no need for this to be required.
> 

OK, this device supports 0x0 -0xff, I will drop.

> > +  - device_type
> > +  - num-lanes
> > +  - num-viewport
> > +  - clocks
> > +  - clock-names
> > +  - max-link-speed
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +
> > +    soc {
> > +        #address-cells = <2>;
> > +        #size-cells = <2>;
> > +
> > +        pcie: pcie@28400000 {
> > +            compatible = "toshiba,visconti-pcie";
> > +            reg = <0x0 0x28400000 0x0 0x00400000>,
> > +                  <0x0 0x70000000 0x0 0x10000000>,
> > +                  <0x0 0x28050000 0x0 0x00010000>,
> > +                  <0x0 0x24200000 0x0 0x00002000>,
> > +                  <0x0 0x24162000 0x0 0x00001000>;
> > +            reg-names  = "dbi", "config", "ulreg", "smu", "mpu";
> > +            device_type = "pci";
> > +            bus-range = <0x00 0xff>;
> > +            num-lanes = <2>;
> > +            num-viewport = <8>;
> > +
> > +            #address-cells = <3>;
> > +            #size-cells = <2>;
> > +            #interrupt-cells = <1>;
> > +            ranges = <0x81000000 0 0x40000000 0 0x40000000 0 0x00010000>,
> > +                     <0x82000000 0 0x50000000 0 0x50000000 0 0x20000000>;
> > +            interrupts = <GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> > +            interrupt-names = "intr";
> > +            interrupt-map-mask = <0 0 0 7>;
> > +            interrupt-map =
> > +                <0 0 0 1 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> > +                 0 0 0 2 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> > +                 0 0 0 3 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH
> > +                 0 0 0 4 &gic GIC_SPI 215 IRQ_TYPE_LEVEL_HIGH>;
> > +            clocks = <&extclk100mhz>, <&clk600mhz>, <&clk25mhz>;
> > +            clock-names = "pcie_refclk", "sysclk", "auxclk";
> > +            max-link-speed = <2>;
> > +
> > +            status = "disabled";
> 
> Don't show status in examples.

OK, I will drop.

> 
> > +        };
> > +    };
> > +...
> > --
> > 2.30.0.rc2
> >
> 

Best regards,
  Nobuhiro


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[PATCH 2/3] PCI: dwc: Visoconti: PCIe RC controller driver

[Nobuhiro Iwamatsu]

Add support to PCIe RC controller on Toshiba Visconti ARM SoCs.
PCIe controller is based of Synopsys DesignWare PCIe core.

Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
---
 drivers/pci/controller/dwc/Kconfig         |  10 +
 drivers/pci/controller/dwc/Makefile        |   1 +
 drivers/pci/controller/dwc/pcie-visconti.c | 358 +++++++++++++++++++++
 3 files changed, 369 insertions(+)
 create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c

diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index b9aaa84452c4..ae125d7cf375 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -286,6 +286,16 @@ config PCIE_TEGRA194_EP
 	  in order to enable device-specific features PCIE_TEGRA194_EP must be
 	  selected. This uses the DesignWare core.
 
+config PCIE_VISCONTI
+	bool "Toshiba VISCONTI PCIe controllers"
+	depends on ARCH_VISCONTI || COMPILE_TEST
+	depends on OF && HAS_IOMEM
+	depends on PCI_MSI_IRQ_DOMAIN
+	select PCIE_DW_HOST
+	help
+	  Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
+	  This driver supports TMPV77xx.
+
 config PCIE_UNIPHIER
 	bool "Socionext UniPhier PCIe host controllers"
 	depends on ARCH_UNIPHIER || COMPILE_TEST
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index ba7c42f6df6f..46ac5d49dc75 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_PCI_MESON) += pci-meson.o
 obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
 obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
 obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
+obj-$(CONFIG_PCIE_VISCONTI) += pcie-visconti.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-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c
new file mode 100644
index 000000000000..e24f83df41b8
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-visconti.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * DWC PCIe RC driver for Toshiba Visconti ARM SoC
+ *
+ * Copyright (C) 2019, 2020 Toshiba Electronic Device & Storage Corporation
+ * Copyright (C) 2020, TOSHIBA CORPORATION
+ *
+ * Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/of_platform.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/resource.h>
+#include <linux/types.h>
+
+#include "pcie-designware.h"
+#include "../../pci.h"
+
+struct visconti_pcie {
+	struct dw_pcie *pci;
+	void __iomem *ulreg_base;
+	void __iomem *smu_base;
+	void __iomem *mpu_base;
+	struct clk *refclk;
+	struct clk *sysclk;
+	struct clk *auxclk;
+};
+
+#define PCIE_UL_REG_S_PCIE_MODE		0x00F4
+#define  PCIE_UL_REG_S_PCIE_MODE_EP	0x00
+#define  PCIE_UL_REG_S_PCIE_MODE_RC	0x04
+
+#define PCIE_UL_REG_S_PERSTN_CTRL	0x00F8
+#define  PCIE_UL_IOM_PCIE_PERSTN_I_EN	BIT(3)
+#define  PCIE_UL_DIRECT_PERSTN_EN	BIT(2)
+#define  PCIE_UL_PERSTN_OUT		BIT(1)
+#define  PCIE_UL_DIRECT_PERSTN		BIT(0)
+
+#define PCIE_UL_REG_S_PHY_INIT_02	0x0104
+#define  PCIE_UL_PHY0_SRAM_EXT_LD_DONE	BIT(0)
+
+#define PCIE_UL_REG_S_PHY_INIT_03	0x0108
+#define  PCIE_UL_PHY0_SRAM_INIT_DONE	BIT(0)
+
+#define PCIE_UL_REG_S_INT_EVENT_MASK1	0x0138
+#define  PCIE_UL_CFG_PME_INT		BIT(0)
+#define  PCIE_UL_CFG_LINK_EQ_REQ_INT	BIT(1)
+#define  PCIE_UL_EDMA_INT0		BIT(2)
+#define  PCIE_UL_EDMA_INT1		BIT(3)
+#define  PCIE_UL_EDMA_INT2		BIT(4)
+#define  PCIE_UL_EDMA_INT3		BIT(5)
+#define  PCIE_UL_S_INT_EVENT_MASK1_ALL  (PCIE_UL_CFG_PME_INT | PCIE_UL_CFG_LINK_EQ_REQ_INT | \
+					 PCIE_UL_EDMA_INT0 | PCIE_UL_EDMA_INT1 | \
+					 PCIE_UL_EDMA_INT2 | PCIE_UL_EDMA_INT3)
+
+#define PCIE_UL_REG_S_SB_MON		0x0198
+#define PCIE_UL_REG_S_SIG_MON		0x019C
+#define  PCIE_UL_CORE_RST_N_MON		BIT(0)
+
+#define PCIE_UL_REG_V_SII_DBG_00	0x0844
+#define PCIE_UL_REG_V_SII_GEN_CTRL_01	0x0860
+#define  PCIE_UL_APP_LTSSM_ENABLE	BIT(0)
+
+#define PCIE_UL_REG_V_PHY_ST_00		0x0864
+#define  PCIE_UL_SMLH_LINK_UP		BIT(0)
+
+#define PCIE_UL_REG_V_PHY_ST_02		0x0868
+#define  PCIE_UL_S_DETECT_ACT		0x01
+#define  PCIE_UL_S_L0			0x11
+
+#define PISMU_CKON_PCIE			0x0038
+#define  PISMU_CKON_PCIE_AUX_CLK	BIT(1)
+#define  PISMU_CKON_PCIE_MSTR_ACLK	BIT(0)
+
+#define PISMU_RSOFF_PCIE		0x0538
+#define  PISMU_RSOFF_PCIE_ULREG_RST_N	BIT(1)
+#define  PISMU_RSOFF_PCIE_PWR_UP_RST_N	BIT(0)
+
+#define PCIE_MPU_REG_MP_EN		0x0
+#define  MPU_MP_EN_DISABLE		BIT(0)
+
+#define PCIE_BUS_OFFSET			0x40000000
+
+/* Access registers in PCIe ulreg */
+static inline void visconti_ulreg_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
+{
+	writel(val, pcie->ulreg_base + reg);
+}
+
+/* Access registers in PCIe smu */
+static inline void visconti_smu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
+{
+	writel(val, pcie->smu_base + reg);
+}
+
+/* Access registers in PCIe mpu */
+static inline void visconti_mpu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
+{
+	writel(val, pcie->mpu_base + reg);
+}
+
+static inline u32 visconti_mpu_readl(struct visconti_pcie *pcie, u32 reg)
+{
+	return readl(pcie->mpu_base + reg);
+}
+
+static int visconti_pcie_check_link_status(struct visconti_pcie *pcie)
+{
+	int err;
+	u32 val;
+
+	/* wait for linkup of phy link layer */
+	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_00, val,
+				 (val & PCIE_UL_SMLH_LINK_UP), 1000, 10000);
+	if (err)
+		return err;
+
+	/* wait for linkup of data link layer */
+	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
+				 (val & PCIE_UL_S_DETECT_ACT), 1000, 10000);
+	if (err)
+		return err;
+
+	/* wait for LTSSM Status */
+	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
+				  (val & PCIE_UL_S_L0), 1000, 10000);
+}
+
+static int visconti_pcie_establish_link(struct pcie_port *pp)
+{
+	int ret;
+	u32 val;
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	struct visconti_pcie *pcie = dev_get_drvdata(pci->dev);
+
+	visconti_ulreg_writel(pcie, PCIE_UL_APP_LTSSM_ENABLE, PCIE_UL_REG_V_SII_GEN_CTRL_01);
+
+	ret = visconti_pcie_check_link_status(pcie);
+	if (ret < 0) {
+		dev_info(pci->dev, "Link failure\n");
+		return ret;
+	}
+
+	val = visconti_mpu_readl(pcie, PCIE_MPU_REG_MP_EN);
+	visconti_mpu_writel(pcie, val & ~MPU_MP_EN_DISABLE, PCIE_MPU_REG_MP_EN);
+
+	visconti_ulreg_writel(pcie, PCIE_UL_S_INT_EVENT_MASK1_ALL, PCIE_UL_REG_S_INT_EVENT_MASK1);
+
+	return 0;
+}
+
+static int visconti_pcie_host_init(struct pcie_port *pp)
+{
+	int ret;
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+	dw_pcie_setup_rc(pp);
+	ret = visconti_pcie_establish_link(pp);
+	if (ret < 0)
+		return ret;
+
+	dw_pcie_wait_for_link(pci);
+
+	return 0;
+}
+
+static const struct dw_pcie_host_ops visconti_pcie_host_ops = {
+	.host_init = visconti_pcie_host_init,
+};
+
+static u64 visconti_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 pci_addr)
+{
+	return pci_addr - PCIE_BUS_OFFSET;
+}
+
+static const struct dw_pcie_ops dw_pcie_ops = {
+	.cpu_addr_fixup = visconti_pcie_cpu_addr_fixup,
+};
+
+static int visconti_get_resources(struct platform_device *pdev,
+				  struct visconti_pcie *pcie)
+{
+	struct device *dev = &pdev->dev;
+
+	pcie->pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
+	if (IS_ERR(pcie->pci->dbi_base))
+		return PTR_ERR(pcie->pci->dbi_base);
+
+	pcie->ulreg_base = devm_platform_ioremap_resource_byname(pdev, "ulreg");
+	if (IS_ERR(pcie->ulreg_base))
+		return PTR_ERR(pcie->ulreg_base);
+
+	pcie->smu_base = devm_platform_ioremap_resource_byname(pdev, "smu");
+	if (IS_ERR(pcie->smu_base))
+		return PTR_ERR(pcie->smu_base);
+
+	pcie->mpu_base = devm_platform_ioremap_resource_byname(pdev, "mpu");
+	if (IS_ERR(pcie->mpu_base))
+		return PTR_ERR(pcie->mpu_base);
+
+	pcie->refclk = devm_clk_get(dev, "pcie_refclk");
+	if (IS_ERR(pcie->refclk)) {
+		dev_err(dev, "Failed to get refclk clock: %ld\n", PTR_ERR(pcie->refclk));
+		return PTR_ERR(pcie->refclk);
+	}
+
+	pcie->sysclk = devm_clk_get(dev, "sysclk");
+	if (IS_ERR(pcie->sysclk)) {
+		dev_err(dev, "Failed to get sysclk clock: %ld\n", PTR_ERR(pcie->sysclk));
+		return PTR_ERR(pcie->sysclk);
+	}
+
+	pcie->auxclk = devm_clk_get(dev, "auxclk");
+	if (IS_ERR(pcie->auxclk)) {
+		dev_err(dev, "Failed to get auxclk clock: %ld\n", PTR_ERR(pcie->auxclk));
+		return PTR_ERR(pcie->auxclk);
+	}
+
+	return 0;
+}
+
+static int visconti_device_turnon(struct visconti_pcie *pcie)
+{
+	int err;
+	u32 val;
+
+	visconti_smu_writel(pcie, PISMU_CKON_PCIE_AUX_CLK | PISMU_CKON_PCIE_MSTR_ACLK,
+			    PISMU_CKON_PCIE);
+	ndelay(250);
+
+	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_ULREG_RST_N, PISMU_RSOFF_PCIE);
+
+	visconti_ulreg_writel(pcie, PCIE_UL_REG_S_PCIE_MODE_RC, PCIE_UL_REG_S_PCIE_MODE);
+
+	val = PCIE_UL_IOM_PCIE_PERSTN_I_EN | PCIE_UL_DIRECT_PERSTN_EN | PCIE_UL_DIRECT_PERSTN;
+	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
+	udelay(100);
+
+	val |= PCIE_UL_PERSTN_OUT;
+	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
+	udelay(100);
+
+	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_PWR_UP_RST_N, PISMU_RSOFF_PCIE);
+
+	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_PHY_INIT_03, val,
+				 (val & PCIE_UL_PHY0_SRAM_INIT_DONE), 100, 1000);
+	if (err)
+		return err;
+
+	visconti_ulreg_writel(pcie, PCIE_UL_PHY0_SRAM_EXT_LD_DONE, PCIE_UL_REG_S_PHY_INIT_02);
+
+	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_SIG_MON, val,
+				 (val & PCIE_UL_CORE_RST_N_MON), 100, 1000);
+}
+
+static int visconti_add_pcie_port(struct visconti_pcie *pcie, struct platform_device *pdev)
+{
+	struct dw_pcie *pci = pcie->pci;
+	struct pcie_port *pp = &pci->pp;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	pp->irq = platform_get_irq_byname(pdev, "intr");
+	if (pp->irq < 0) {
+		dev_err(dev, "interrupt intr is missing");
+		return pp->irq;
+	}
+
+	if (IS_ENABLED(CONFIG_PCI_MSI)) {
+		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
+		if (pp->msi_irq < 0) {
+			dev_err(dev, "interrupt msi is missing");
+			return pp->msi_irq;
+		}
+	}
+
+	pp->ops = &visconti_pcie_host_ops;
+
+	pci->link_gen = of_pci_get_max_link_speed(pdev->dev.of_node);
+	if (pci->link_gen < 0 || pci->link_gen > 3) {
+		pci->link_gen = 3;
+		dev_dbg(dev, "Applied default link speed\n");
+	}
+
+	dev_dbg(dev, "link speed Gen %d", pci->link_gen);
+
+	ret = visconti_device_turnon(pcie);
+	if (ret)
+		goto error;
+
+	ret = dw_pcie_host_init(pp);
+	if (ret)
+		dev_err(dev, "Failed to initialize host\n");
+
+error:
+	return ret;
+}
+
+static int visconti_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct visconti_pcie *pcie;
+	struct pcie_port *pp;
+	struct dw_pcie *pci;
+	int ret;
+
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36));
+	if (ret)
+		return ret;
+
+	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
+	if (!pcie)
+		return -ENOMEM;
+
+	pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+	if (!pci)
+		return -ENOMEM;
+
+	pp = &pci->pp;
+	pp->num_vectors = MAX_MSI_IRQS;
+
+	pci->dev = dev;
+	pci->ops = &dw_pcie_ops;
+	pcie->pci = pci;
+
+	ret = visconti_get_resources(pdev, pcie);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, pcie);
+
+	return visconti_add_pcie_port(pcie, pdev);
+}
+
+static const struct of_device_id visconti_pcie_match[] = {
+	{ .compatible = "toshiba,visconti-pcie" },
+	{},
+};
+
+static struct platform_driver visconti_pcie_driver = {
+	.probe = visconti_pcie_probe,
+	.driver = {
+		.name = "visconti-pcie",
+		.of_match_table = visconti_pcie_match,
+		.suppress_bind_attrs = true,
+	},
+};
+
+builtin_platform_driver(visconti_pcie_driver);
-- 
2.30.0.rc2

[PATCH 2/3] PCI: dwc: Visoconti: PCIe RC controller driver

[Nobuhiro Iwamatsu]

Add support to PCIe RC controller on Toshiba Visconti ARM SoCs.
PCIe controller is based of Synopsys DesignWare PCIe core.

Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
---
 drivers/pci/controller/dwc/Kconfig         |  10 +
 drivers/pci/controller/dwc/Makefile        |   1 +
 drivers/pci/controller/dwc/pcie-visconti.c | 358 +++++++++++++++++++++
 3 files changed, 369 insertions(+)
 create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c

diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index b9aaa84452c4..ae125d7cf375 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -286,6 +286,16 @@ config PCIE_TEGRA194_EP
 	  in order to enable device-specific features PCIE_TEGRA194_EP must be
 	  selected. This uses the DesignWare core.
 
+config PCIE_VISCONTI
+	bool "Toshiba VISCONTI PCIe controllers"
+	depends on ARCH_VISCONTI || COMPILE_TEST
+	depends on OF && HAS_IOMEM
+	depends on PCI_MSI_IRQ_DOMAIN
+	select PCIE_DW_HOST
+	help
+	  Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
+	  This driver supports TMPV77xx.
+
 config PCIE_UNIPHIER
 	bool "Socionext UniPhier PCIe host controllers"
 	depends on ARCH_UNIPHIER || COMPILE_TEST
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index ba7c42f6df6f..46ac5d49dc75 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_PCI_MESON) += pci-meson.o
 obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
 obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
 obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
+obj-$(CONFIG_PCIE_VISCONTI) += pcie-visconti.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-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c
new file mode 100644
index 000000000000..e24f83df41b8
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-visconti.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * DWC PCIe RC driver for Toshiba Visconti ARM SoC
+ *
+ * Copyright (C) 2019, 2020 Toshiba Electronic Device & Storage Corporation
+ * Copyright (C) 2020, TOSHIBA CORPORATION
+ *
+ * Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/of_platform.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/resource.h>
+#include <linux/types.h>
+
+#include "pcie-designware.h"
+#include "../../pci.h"
+
+struct visconti_pcie {
+	struct dw_pcie *pci;
+	void __iomem *ulreg_base;
+	void __iomem *smu_base;
+	void __iomem *mpu_base;
+	struct clk *refclk;
+	struct clk *sysclk;
+	struct clk *auxclk;
+};
+
+#define PCIE_UL_REG_S_PCIE_MODE		0x00F4
+#define  PCIE_UL_REG_S_PCIE_MODE_EP	0x00
+#define  PCIE_UL_REG_S_PCIE_MODE_RC	0x04
+
+#define PCIE_UL_REG_S_PERSTN_CTRL	0x00F8
+#define  PCIE_UL_IOM_PCIE_PERSTN_I_EN	BIT(3)
+#define  PCIE_UL_DIRECT_PERSTN_EN	BIT(2)
+#define  PCIE_UL_PERSTN_OUT		BIT(1)
+#define  PCIE_UL_DIRECT_PERSTN		BIT(0)
+
+#define PCIE_UL_REG_S_PHY_INIT_02	0x0104
+#define  PCIE_UL_PHY0_SRAM_EXT_LD_DONE	BIT(0)
+
+#define PCIE_UL_REG_S_PHY_INIT_03	0x0108
+#define  PCIE_UL_PHY0_SRAM_INIT_DONE	BIT(0)
+
+#define PCIE_UL_REG_S_INT_EVENT_MASK1	0x0138
+#define  PCIE_UL_CFG_PME_INT		BIT(0)
+#define  PCIE_UL_CFG_LINK_EQ_REQ_INT	BIT(1)
+#define  PCIE_UL_EDMA_INT0		BIT(2)
+#define  PCIE_UL_EDMA_INT1		BIT(3)
+#define  PCIE_UL_EDMA_INT2		BIT(4)
+#define  PCIE_UL_EDMA_INT3		BIT(5)
+#define  PCIE_UL_S_INT_EVENT_MASK1_ALL  (PCIE_UL_CFG_PME_INT | PCIE_UL_CFG_LINK_EQ_REQ_INT | \
+					 PCIE_UL_EDMA_INT0 | PCIE_UL_EDMA_INT1 | \
+					 PCIE_UL_EDMA_INT2 | PCIE_UL_EDMA_INT3)
+
+#define PCIE_UL_REG_S_SB_MON		0x0198
+#define PCIE_UL_REG_S_SIG_MON		0x019C
+#define  PCIE_UL_CORE_RST_N_MON		BIT(0)
+
+#define PCIE_UL_REG_V_SII_DBG_00	0x0844
+#define PCIE_UL_REG_V_SII_GEN_CTRL_01	0x0860
+#define  PCIE_UL_APP_LTSSM_ENABLE	BIT(0)
+
+#define PCIE_UL_REG_V_PHY_ST_00		0x0864
+#define  PCIE_UL_SMLH_LINK_UP		BIT(0)
+
+#define PCIE_UL_REG_V_PHY_ST_02		0x0868
+#define  PCIE_UL_S_DETECT_ACT		0x01
+#define  PCIE_UL_S_L0			0x11
+
+#define PISMU_CKON_PCIE			0x0038
+#define  PISMU_CKON_PCIE_AUX_CLK	BIT(1)
+#define  PISMU_CKON_PCIE_MSTR_ACLK	BIT(0)
+
+#define PISMU_RSOFF_PCIE		0x0538
+#define  PISMU_RSOFF_PCIE_ULREG_RST_N	BIT(1)
+#define  PISMU_RSOFF_PCIE_PWR_UP_RST_N	BIT(0)
+
+#define PCIE_MPU_REG_MP_EN		0x0
+#define  MPU_MP_EN_DISABLE		BIT(0)
+
+#define PCIE_BUS_OFFSET			0x40000000
+
+/* Access registers in PCIe ulreg */
+static inline void visconti_ulreg_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
+{
+	writel(val, pcie->ulreg_base + reg);
+}
+
+/* Access registers in PCIe smu */
+static inline void visconti_smu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
+{
+	writel(val, pcie->smu_base + reg);
+}
+
+/* Access registers in PCIe mpu */
+static inline void visconti_mpu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
+{
+	writel(val, pcie->mpu_base + reg);
+}
+
+static inline u32 visconti_mpu_readl(struct visconti_pcie *pcie, u32 reg)
+{
+	return readl(pcie->mpu_base + reg);
+}
+
+static int visconti_pcie_check_link_status(struct visconti_pcie *pcie)
+{
+	int err;
+	u32 val;
+
+	/* wait for linkup of phy link layer */
+	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_00, val,
+				 (val & PCIE_UL_SMLH_LINK_UP), 1000, 10000);
+	if (err)
+		return err;
+
+	/* wait for linkup of data link layer */
+	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
+				 (val & PCIE_UL_S_DETECT_ACT), 1000, 10000);
+	if (err)
+		return err;
+
+	/* wait for LTSSM Status */
+	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
+				  (val & PCIE_UL_S_L0), 1000, 10000);
+}
+
+static int visconti_pcie_establish_link(struct pcie_port *pp)
+{
+	int ret;
+	u32 val;
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	struct visconti_pcie *pcie = dev_get_drvdata(pci->dev);
+
+	visconti_ulreg_writel(pcie, PCIE_UL_APP_LTSSM_ENABLE, PCIE_UL_REG_V_SII_GEN_CTRL_01);
+
+	ret = visconti_pcie_check_link_status(pcie);
+	if (ret < 0) {
+		dev_info(pci->dev, "Link failure\n");
+		return ret;
+	}
+
+	val = visconti_mpu_readl(pcie, PCIE_MPU_REG_MP_EN);
+	visconti_mpu_writel(pcie, val & ~MPU_MP_EN_DISABLE, PCIE_MPU_REG_MP_EN);
+
+	visconti_ulreg_writel(pcie, PCIE_UL_S_INT_EVENT_MASK1_ALL, PCIE_UL_REG_S_INT_EVENT_MASK1);
+
+	return 0;
+}
+
+static int visconti_pcie_host_init(struct pcie_port *pp)
+{
+	int ret;
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+	dw_pcie_setup_rc(pp);
+	ret = visconti_pcie_establish_link(pp);
+	if (ret < 0)
+		return ret;
+
+	dw_pcie_wait_for_link(pci);
+
+	return 0;
+}
+
+static const struct dw_pcie_host_ops visconti_pcie_host_ops = {
+	.host_init = visconti_pcie_host_init,
+};
+
+static u64 visconti_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 pci_addr)
+{
+	return pci_addr - PCIE_BUS_OFFSET;
+}
+
+static const struct dw_pcie_ops dw_pcie_ops = {
+	.cpu_addr_fixup = visconti_pcie_cpu_addr_fixup,
+};
+
+static int visconti_get_resources(struct platform_device *pdev,
+				  struct visconti_pcie *pcie)
+{
+	struct device *dev = &pdev->dev;
+
+	pcie->pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
+	if (IS_ERR(pcie->pci->dbi_base))
+		return PTR_ERR(pcie->pci->dbi_base);
+
+	pcie->ulreg_base = devm_platform_ioremap_resource_byname(pdev, "ulreg");
+	if (IS_ERR(pcie->ulreg_base))
+		return PTR_ERR(pcie->ulreg_base);
+
+	pcie->smu_base = devm_platform_ioremap_resource_byname(pdev, "smu");
+	if (IS_ERR(pcie->smu_base))
+		return PTR_ERR(pcie->smu_base);
+
+	pcie->mpu_base = devm_platform_ioremap_resource_byname(pdev, "mpu");
+	if (IS_ERR(pcie->mpu_base))
+		return PTR_ERR(pcie->mpu_base);
+
+	pcie->refclk = devm_clk_get(dev, "pcie_refclk");
+	if (IS_ERR(pcie->refclk)) {
+		dev_err(dev, "Failed to get refclk clock: %ld\n", PTR_ERR(pcie->refclk));
+		return PTR_ERR(pcie->refclk);
+	}
+
+	pcie->sysclk = devm_clk_get(dev, "sysclk");
+	if (IS_ERR(pcie->sysclk)) {
+		dev_err(dev, "Failed to get sysclk clock: %ld\n", PTR_ERR(pcie->sysclk));
+		return PTR_ERR(pcie->sysclk);
+	}
+
+	pcie->auxclk = devm_clk_get(dev, "auxclk");
+	if (IS_ERR(pcie->auxclk)) {
+		dev_err(dev, "Failed to get auxclk clock: %ld\n", PTR_ERR(pcie->auxclk));
+		return PTR_ERR(pcie->auxclk);
+	}
+
+	return 0;
+}
+
+static int visconti_device_turnon(struct visconti_pcie *pcie)
+{
+	int err;
+	u32 val;
+
+	visconti_smu_writel(pcie, PISMU_CKON_PCIE_AUX_CLK | PISMU_CKON_PCIE_MSTR_ACLK,
+			    PISMU_CKON_PCIE);
+	ndelay(250);
+
+	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_ULREG_RST_N, PISMU_RSOFF_PCIE);
+
+	visconti_ulreg_writel(pcie, PCIE_UL_REG_S_PCIE_MODE_RC, PCIE_UL_REG_S_PCIE_MODE);
+
+	val = PCIE_UL_IOM_PCIE_PERSTN_I_EN | PCIE_UL_DIRECT_PERSTN_EN | PCIE_UL_DIRECT_PERSTN;
+	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
+	udelay(100);
+
+	val |= PCIE_UL_PERSTN_OUT;
+	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
+	udelay(100);
+
+	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_PWR_UP_RST_N, PISMU_RSOFF_PCIE);
+
+	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_PHY_INIT_03, val,
+				 (val & PCIE_UL_PHY0_SRAM_INIT_DONE), 100, 1000);
+	if (err)
+		return err;
+
+	visconti_ulreg_writel(pcie, PCIE_UL_PHY0_SRAM_EXT_LD_DONE, PCIE_UL_REG_S_PHY_INIT_02);
+
+	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_SIG_MON, val,
+				 (val & PCIE_UL_CORE_RST_N_MON), 100, 1000);
+}
+
+static int visconti_add_pcie_port(struct visconti_pcie *pcie, struct platform_device *pdev)
+{
+	struct dw_pcie *pci = pcie->pci;
+	struct pcie_port *pp = &pci->pp;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	pp->irq = platform_get_irq_byname(pdev, "intr");
+	if (pp->irq < 0) {
+		dev_err(dev, "interrupt intr is missing");
+		return pp->irq;
+	}
+
+	if (IS_ENABLED(CONFIG_PCI_MSI)) {
+		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
+		if (pp->msi_irq < 0) {
+			dev_err(dev, "interrupt msi is missing");
+			return pp->msi_irq;
+		}
+	}
+
+	pp->ops = &visconti_pcie_host_ops;
+
+	pci->link_gen = of_pci_get_max_link_speed(pdev->dev.of_node);
+	if (pci->link_gen < 0 || pci->link_gen > 3) {
+		pci->link_gen = 3;
+		dev_dbg(dev, "Applied default link speed\n");
+	}
+
+	dev_dbg(dev, "link speed Gen %d", pci->link_gen);
+
+	ret = visconti_device_turnon(pcie);
+	if (ret)
+		goto error;
+
+	ret = dw_pcie_host_init(pp);
+	if (ret)
+		dev_err(dev, "Failed to initialize host\n");
+
+error:
+	return ret;
+}
+
+static int visconti_pcie_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct visconti_pcie *pcie;
+	struct pcie_port *pp;
+	struct dw_pcie *pci;
+	int ret;
+
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36));
+	if (ret)
+		return ret;
+
+	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
+	if (!pcie)
+		return -ENOMEM;
+
+	pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+	if (!pci)
+		return -ENOMEM;
+
+	pp = &pci->pp;
+	pp->num_vectors = MAX_MSI_IRQS;
+
+	pci->dev = dev;
+	pci->ops = &dw_pcie_ops;
+	pcie->pci = pci;
+
+	ret = visconti_get_resources(pdev, pcie);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, pcie);
+
+	return visconti_add_pcie_port(pcie, pdev);
+}
+
+static const struct of_device_id visconti_pcie_match[] = {
+	{ .compatible = "toshiba,visconti-pcie" },
+	{},
+};
+
+static struct platform_driver visconti_pcie_driver = {
+	.probe = visconti_pcie_probe,
+	.driver = {
+		.name = "visconti-pcie",
+		.of_match_table = visconti_pcie_match,
+		.suppress_bind_attrs = true,
+	},
+};
+
+builtin_platform_driver(visconti_pcie_driver);
-- 
2.30.0.rc2


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Re: [PATCH 2/3] PCI: dwc: Visoconti: PCIe RC controller driver

[Rob Herring]

On Wed, Apr 07, 2021 at 12:18:38PM +0900, Nobuhiro Iwamatsu wrote:
> Add support to PCIe RC controller on Toshiba Visconti ARM SoCs.
> PCIe controller is based of Synopsys DesignWare PCIe core.
> 
> Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> ---
>  drivers/pci/controller/dwc/Kconfig         |  10 +
>  drivers/pci/controller/dwc/Makefile        |   1 +
>  drivers/pci/controller/dwc/pcie-visconti.c | 358 +++++++++++++++++++++
>  3 files changed, 369 insertions(+)
>  create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c
> 
> diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> index b9aaa84452c4..ae125d7cf375 100644
> --- a/drivers/pci/controller/dwc/Kconfig
> +++ b/drivers/pci/controller/dwc/Kconfig
> @@ -286,6 +286,16 @@ config PCIE_TEGRA194_EP
>  	  in order to enable device-specific features PCIE_TEGRA194_EP must be
>  	  selected. This uses the DesignWare core.
>  
> +config PCIE_VISCONTI
> +	bool "Toshiba VISCONTI PCIe controllers"
> +	depends on ARCH_VISCONTI || COMPILE_TEST
> +	depends on OF && HAS_IOMEM

Is this line really needed? Seems we have a mixture on other drivers.

> +	depends on PCI_MSI_IRQ_DOMAIN
> +	select PCIE_DW_HOST
> +	help
> +	  Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
> +	  This driver supports TMPV77xx.
> +
>  config PCIE_UNIPHIER
>  	bool "Socionext UniPhier PCIe host controllers"
>  	depends on ARCH_UNIPHIER || COMPILE_TEST
> diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
> index ba7c42f6df6f..46ac5d49dc75 100644
> --- a/drivers/pci/controller/dwc/Makefile
> +++ b/drivers/pci/controller/dwc/Makefile
> @@ -20,6 +20,7 @@ obj-$(CONFIG_PCI_MESON) += pci-meson.o
>  obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
>  obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
>  obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
> +obj-$(CONFIG_PCIE_VISCONTI) += pcie-visconti.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-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c
> new file mode 100644
> index 000000000000..e24f83df41b8
> --- /dev/null
> +++ b/drivers/pci/controller/dwc/pcie-visconti.c
> @@ -0,0 +1,358 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * DWC PCIe RC driver for Toshiba Visconti ARM SoC
> + *
> + * Copyright (C) 2019, 2020 Toshiba Electronic Device & Storage Corporation
> + * Copyright (C) 2020, TOSHIBA CORPORATION
> + *
> + * Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> + *
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/gpio.h>
> +#include <linux/interrupt.h>
> +#include <linux/init.h>
> +#include <linux/iopoll.h>
> +#include <linux/kernel.h>
> +#include <linux/of_platform.h>
> +#include <linux/pci.h>
> +#include <linux/platform_device.h>
> +#include <linux/resource.h>
> +#include <linux/types.h>
> +
> +#include "pcie-designware.h"
> +#include "../../pci.h"
> +
> +struct visconti_pcie {
> +	struct dw_pcie *pci;

Embed this rather than a pointer. 1 less alloc.

> +	void __iomem *ulreg_base;
> +	void __iomem *smu_base;
> +	void __iomem *mpu_base;
> +	struct clk *refclk;
> +	struct clk *sysclk;
> +	struct clk *auxclk;
> +};
> +
> +#define PCIE_UL_REG_S_PCIE_MODE		0x00F4
> +#define  PCIE_UL_REG_S_PCIE_MODE_EP	0x00
> +#define  PCIE_UL_REG_S_PCIE_MODE_RC	0x04
> +
> +#define PCIE_UL_REG_S_PERSTN_CTRL	0x00F8
> +#define  PCIE_UL_IOM_PCIE_PERSTN_I_EN	BIT(3)
> +#define  PCIE_UL_DIRECT_PERSTN_EN	BIT(2)
> +#define  PCIE_UL_PERSTN_OUT		BIT(1)
> +#define  PCIE_UL_DIRECT_PERSTN		BIT(0)
> +
> +#define PCIE_UL_REG_S_PHY_INIT_02	0x0104
> +#define  PCIE_UL_PHY0_SRAM_EXT_LD_DONE	BIT(0)
> +
> +#define PCIE_UL_REG_S_PHY_INIT_03	0x0108
> +#define  PCIE_UL_PHY0_SRAM_INIT_DONE	BIT(0)
> +
> +#define PCIE_UL_REG_S_INT_EVENT_MASK1	0x0138
> +#define  PCIE_UL_CFG_PME_INT		BIT(0)
> +#define  PCIE_UL_CFG_LINK_EQ_REQ_INT	BIT(1)
> +#define  PCIE_UL_EDMA_INT0		BIT(2)
> +#define  PCIE_UL_EDMA_INT1		BIT(3)
> +#define  PCIE_UL_EDMA_INT2		BIT(4)
> +#define  PCIE_UL_EDMA_INT3		BIT(5)
> +#define  PCIE_UL_S_INT_EVENT_MASK1_ALL  (PCIE_UL_CFG_PME_INT | PCIE_UL_CFG_LINK_EQ_REQ_INT | \
> +					 PCIE_UL_EDMA_INT0 | PCIE_UL_EDMA_INT1 | \
> +					 PCIE_UL_EDMA_INT2 | PCIE_UL_EDMA_INT3)
> +
> +#define PCIE_UL_REG_S_SB_MON		0x0198
> +#define PCIE_UL_REG_S_SIG_MON		0x019C
> +#define  PCIE_UL_CORE_RST_N_MON		BIT(0)
> +
> +#define PCIE_UL_REG_V_SII_DBG_00	0x0844
> +#define PCIE_UL_REG_V_SII_GEN_CTRL_01	0x0860
> +#define  PCIE_UL_APP_LTSSM_ENABLE	BIT(0)
> +
> +#define PCIE_UL_REG_V_PHY_ST_00		0x0864
> +#define  PCIE_UL_SMLH_LINK_UP		BIT(0)
> +
> +#define PCIE_UL_REG_V_PHY_ST_02		0x0868
> +#define  PCIE_UL_S_DETECT_ACT		0x01
> +#define  PCIE_UL_S_L0			0x11
> +
> +#define PISMU_CKON_PCIE			0x0038
> +#define  PISMU_CKON_PCIE_AUX_CLK	BIT(1)
> +#define  PISMU_CKON_PCIE_MSTR_ACLK	BIT(0)
> +
> +#define PISMU_RSOFF_PCIE		0x0538
> +#define  PISMU_RSOFF_PCIE_ULREG_RST_N	BIT(1)
> +#define  PISMU_RSOFF_PCIE_PWR_UP_RST_N	BIT(0)
> +
> +#define PCIE_MPU_REG_MP_EN		0x0
> +#define  MPU_MP_EN_DISABLE		BIT(0)
> +
> +#define PCIE_BUS_OFFSET			0x40000000
> +
> +/* Access registers in PCIe ulreg */
> +static inline void visconti_ulreg_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> +{
> +	writel(val, pcie->ulreg_base + reg);

Do these need ordering WRT DMA? If not, use _relaxed variant.

> +}
> +
> +/* Access registers in PCIe smu */
> +static inline void visconti_smu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> +{
> +	writel(val, pcie->smu_base + reg);
> +}
> +
> +/* Access registers in PCIe mpu */
> +static inline void visconti_mpu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> +{
> +	writel(val, pcie->mpu_base + reg);
> +}
> +
> +static inline u32 visconti_mpu_readl(struct visconti_pcie *pcie, u32 reg)
> +{
> +	return readl(pcie->mpu_base + reg);
> +}
> +
> +static int visconti_pcie_check_link_status(struct visconti_pcie *pcie)
> +{
> +	int err;
> +	u32 val;
> +
> +	/* wait for linkup of phy link layer */
> +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_00, val,
> +				 (val & PCIE_UL_SMLH_LINK_UP), 1000, 10000);
> +	if (err)
> +		return err;
> +
> +	/* wait for linkup of data link layer */
> +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
> +				 (val & PCIE_UL_S_DETECT_ACT), 1000, 10000);
> +	if (err)
> +		return err;
> +
> +	/* wait for LTSSM Status */
> +	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
> +				  (val & PCIE_UL_S_L0), 1000, 10000);
> +}
> +
> +static int visconti_pcie_establish_link(struct pcie_port *pp)
> +{
> +	int ret;
> +	u32 val;
> +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> +	struct visconti_pcie *pcie = dev_get_drvdata(pci->dev);
> +
> +	visconti_ulreg_writel(pcie, PCIE_UL_APP_LTSSM_ENABLE, PCIE_UL_REG_V_SII_GEN_CTRL_01);
> +
> +	ret = visconti_pcie_check_link_status(pcie);
> +	if (ret < 0) {
> +		dev_info(pci->dev, "Link failure\n");
> +		return ret;
> +	}
> +
> +	val = visconti_mpu_readl(pcie, PCIE_MPU_REG_MP_EN);
> +	visconti_mpu_writel(pcie, val & ~MPU_MP_EN_DISABLE, PCIE_MPU_REG_MP_EN);
> +
> +	visconti_ulreg_writel(pcie, PCIE_UL_S_INT_EVENT_MASK1_ALL, PCIE_UL_REG_S_INT_EVENT_MASK1);

Seems like all this should be a phy driver.

> +
> +	return 0;
> +}
> +
> +static int visconti_pcie_host_init(struct pcie_port *pp)
> +{
> +	int ret;
> +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> +
> +	dw_pcie_setup_rc(pp);

> +	ret = visconti_pcie_establish_link(pp);
> +	if (ret < 0)
> +		return ret;
> +
> +	dw_pcie_wait_for_link(pci);

The DWC core code does link handling now.

> +
> +	return 0;
> +}
> +
> +static const struct dw_pcie_host_ops visconti_pcie_host_ops = {
> +	.host_init = visconti_pcie_host_init,
> +};
> +
> +static u64 visconti_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 pci_addr)
> +{
> +	return pci_addr - PCIE_BUS_OFFSET;
> +}
> +
> +static const struct dw_pcie_ops dw_pcie_ops = {
> +	.cpu_addr_fixup = visconti_pcie_cpu_addr_fixup,
> +};
> +
> +static int visconti_get_resources(struct platform_device *pdev,
> +				  struct visconti_pcie *pcie)
> +{
> +	struct device *dev = &pdev->dev;
> +
> +	pcie->pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
> +	if (IS_ERR(pcie->pci->dbi_base))
> +		return PTR_ERR(pcie->pci->dbi_base);

The DWC core handles this now.

> +
> +	pcie->ulreg_base = devm_platform_ioremap_resource_byname(pdev, "ulreg");
> +	if (IS_ERR(pcie->ulreg_base))
> +		return PTR_ERR(pcie->ulreg_base);
> +
> +	pcie->smu_base = devm_platform_ioremap_resource_byname(pdev, "smu");
> +	if (IS_ERR(pcie->smu_base))
> +		return PTR_ERR(pcie->smu_base);
> +
> +	pcie->mpu_base = devm_platform_ioremap_resource_byname(pdev, "mpu");
> +	if (IS_ERR(pcie->mpu_base))
> +		return PTR_ERR(pcie->mpu_base);
> +
> +	pcie->refclk = devm_clk_get(dev, "pcie_refclk");
> +	if (IS_ERR(pcie->refclk)) {
> +		dev_err(dev, "Failed to get refclk clock: %ld\n", PTR_ERR(pcie->refclk));
> +		return PTR_ERR(pcie->refclk);
> +	}
> +
> +	pcie->sysclk = devm_clk_get(dev, "sysclk");
> +	if (IS_ERR(pcie->sysclk)) {
> +		dev_err(dev, "Failed to get sysclk clock: %ld\n", PTR_ERR(pcie->sysclk));
> +		return PTR_ERR(pcie->sysclk);
> +	}
> +
> +	pcie->auxclk = devm_clk_get(dev, "auxclk");
> +	if (IS_ERR(pcie->auxclk)) {
> +		dev_err(dev, "Failed to get auxclk clock: %ld\n", PTR_ERR(pcie->auxclk));
> +		return PTR_ERR(pcie->auxclk);
> +	}
> +
> +	return 0;
> +}
> +
> +static int visconti_device_turnon(struct visconti_pcie *pcie)
> +{
> +	int err;
> +	u32 val;
> +
> +	visconti_smu_writel(pcie, PISMU_CKON_PCIE_AUX_CLK | PISMU_CKON_PCIE_MSTR_ACLK,
> +			    PISMU_CKON_PCIE);

Clock control? Should be a clock provider then.

> +	ndelay(250);
> +
> +	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_ULREG_RST_N, PISMU_RSOFF_PCIE);
> +
> +	visconti_ulreg_writel(pcie, PCIE_UL_REG_S_PCIE_MODE_RC, PCIE_UL_REG_S_PCIE_MODE);
> +
> +	val = PCIE_UL_IOM_PCIE_PERSTN_I_EN | PCIE_UL_DIRECT_PERSTN_EN | PCIE_UL_DIRECT_PERSTN;
> +	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
> +	udelay(100);
> +
> +	val |= PCIE_UL_PERSTN_OUT;
> +	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
> +	udelay(100);
> +
> +	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_PWR_UP_RST_N, PISMU_RSOFF_PCIE);
> +
> +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_PHY_INIT_03, val,
> +				 (val & PCIE_UL_PHY0_SRAM_INIT_DONE), 100, 1000);
> +	if (err)
> +		return err;
> +
> +	visconti_ulreg_writel(pcie, PCIE_UL_PHY0_SRAM_EXT_LD_DONE, PCIE_UL_REG_S_PHY_INIT_02);
> +
> +	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_SIG_MON, val,
> +				 (val & PCIE_UL_CORE_RST_N_MON), 100, 1000);
> +}
> +
> +static int visconti_add_pcie_port(struct visconti_pcie *pcie, struct platform_device *pdev)
> +{
> +	struct dw_pcie *pci = pcie->pci;
> +	struct pcie_port *pp = &pci->pp;
> +	struct device *dev = &pdev->dev;
> +	int ret;
> +
> +	pp->irq = platform_get_irq_byname(pdev, "intr");
> +	if (pp->irq < 0) {
> +		dev_err(dev, "interrupt intr is missing");
> +		return pp->irq;
> +	}
> +
> +	if (IS_ENABLED(CONFIG_PCI_MSI)) {
> +		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
> +		if (pp->msi_irq < 0) {
> +			dev_err(dev, "interrupt msi is missing");
> +			return pp->msi_irq;
> +		}
> +	}

DWC core handles this now.

> +
> +	pp->ops = &visconti_pcie_host_ops;
> +
> +	pci->link_gen = of_pci_get_max_link_speed(pdev->dev.of_node);
> +	if (pci->link_gen < 0 || pci->link_gen > 3) {
> +		pci->link_gen = 3;
> +		dev_dbg(dev, "Applied default link speed\n");
> +	}
> +
> +	dev_dbg(dev, "link speed Gen %d", pci->link_gen);
> +
> +	ret = visconti_device_turnon(pcie);
> +	if (ret)
> +		goto error;
> +
> +	ret = dw_pcie_host_init(pp);
> +	if (ret)
> +		dev_err(dev, "Failed to initialize host\n");
> +
> +error:
> +	return ret;
> +}
> +
> +static int visconti_pcie_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct visconti_pcie *pcie;
> +	struct pcie_port *pp;
> +	struct dw_pcie *pci;
> +	int ret;
> +
> +	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36));
> +	if (ret)
> +		return ret;
> +
> +	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
> +	if (!pcie)
> +		return -ENOMEM;
> +
> +	pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
> +	if (!pci)
> +		return -ENOMEM;
> +
> +	pp = &pci->pp;
> +	pp->num_vectors = MAX_MSI_IRQS;
> +
> +	pci->dev = dev;
> +	pci->ops = &dw_pcie_ops;
> +	pcie->pci = pci;
> +
> +	ret = visconti_get_resources(pdev, pcie);
> +	if (ret)
> +		return ret;
> +
> +	platform_set_drvdata(pdev, pcie);
> +
> +	return visconti_add_pcie_port(pcie, pdev);
> +}
> +
> +static const struct of_device_id visconti_pcie_match[] = {
> +	{ .compatible = "toshiba,visconti-pcie" },
> +	{},
> +};
> +
> +static struct platform_driver visconti_pcie_driver = {
> +	.probe = visconti_pcie_probe,
> +	.driver = {
> +		.name = "visconti-pcie",
> +		.of_match_table = visconti_pcie_match,
> +		.suppress_bind_attrs = true,
> +	},
> +};
> +
> +builtin_platform_driver(visconti_pcie_driver);
> -- 
> 2.30.0.rc2
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH 2/3] PCI: dwc: Visoconti: PCIe RC controller driver

[Rob Herring]

On Wed, Apr 07, 2021 at 12:18:38PM +0900, Nobuhiro Iwamatsu wrote:
> Add support to PCIe RC controller on Toshiba Visconti ARM SoCs.
> PCIe controller is based of Synopsys DesignWare PCIe core.
> 
> Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> ---
>  drivers/pci/controller/dwc/Kconfig         |  10 +
>  drivers/pci/controller/dwc/Makefile        |   1 +
>  drivers/pci/controller/dwc/pcie-visconti.c | 358 +++++++++++++++++++++
>  3 files changed, 369 insertions(+)
>  create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c
> 
> diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> index b9aaa84452c4..ae125d7cf375 100644
> --- a/drivers/pci/controller/dwc/Kconfig
> +++ b/drivers/pci/controller/dwc/Kconfig
> @@ -286,6 +286,16 @@ config PCIE_TEGRA194_EP
>  	  in order to enable device-specific features PCIE_TEGRA194_EP must be
>  	  selected. This uses the DesignWare core.
>  
> +config PCIE_VISCONTI
> +	bool "Toshiba VISCONTI PCIe controllers"
> +	depends on ARCH_VISCONTI || COMPILE_TEST
> +	depends on OF && HAS_IOMEM

Is this line really needed? Seems we have a mixture on other drivers.

> +	depends on PCI_MSI_IRQ_DOMAIN
> +	select PCIE_DW_HOST
> +	help
> +	  Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
> +	  This driver supports TMPV77xx.
> +
>  config PCIE_UNIPHIER
>  	bool "Socionext UniPhier PCIe host controllers"
>  	depends on ARCH_UNIPHIER || COMPILE_TEST
> diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
> index ba7c42f6df6f..46ac5d49dc75 100644
> --- a/drivers/pci/controller/dwc/Makefile
> +++ b/drivers/pci/controller/dwc/Makefile
> @@ -20,6 +20,7 @@ obj-$(CONFIG_PCI_MESON) += pci-meson.o
>  obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
>  obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
>  obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
> +obj-$(CONFIG_PCIE_VISCONTI) += pcie-visconti.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-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c
> new file mode 100644
> index 000000000000..e24f83df41b8
> --- /dev/null
> +++ b/drivers/pci/controller/dwc/pcie-visconti.c
> @@ -0,0 +1,358 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * DWC PCIe RC driver for Toshiba Visconti ARM SoC
> + *
> + * Copyright (C) 2019, 2020 Toshiba Electronic Device & Storage Corporation
> + * Copyright (C) 2020, TOSHIBA CORPORATION
> + *
> + * Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> + *
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/gpio.h>
> +#include <linux/interrupt.h>
> +#include <linux/init.h>
> +#include <linux/iopoll.h>
> +#include <linux/kernel.h>
> +#include <linux/of_platform.h>
> +#include <linux/pci.h>
> +#include <linux/platform_device.h>
> +#include <linux/resource.h>
> +#include <linux/types.h>
> +
> +#include "pcie-designware.h"
> +#include "../../pci.h"
> +
> +struct visconti_pcie {
> +	struct dw_pcie *pci;

Embed this rather than a pointer. 1 less alloc.

> +	void __iomem *ulreg_base;
> +	void __iomem *smu_base;
> +	void __iomem *mpu_base;
> +	struct clk *refclk;
> +	struct clk *sysclk;
> +	struct clk *auxclk;
> +};
> +
> +#define PCIE_UL_REG_S_PCIE_MODE		0x00F4
> +#define  PCIE_UL_REG_S_PCIE_MODE_EP	0x00
> +#define  PCIE_UL_REG_S_PCIE_MODE_RC	0x04
> +
> +#define PCIE_UL_REG_S_PERSTN_CTRL	0x00F8
> +#define  PCIE_UL_IOM_PCIE_PERSTN_I_EN	BIT(3)
> +#define  PCIE_UL_DIRECT_PERSTN_EN	BIT(2)
> +#define  PCIE_UL_PERSTN_OUT		BIT(1)
> +#define  PCIE_UL_DIRECT_PERSTN		BIT(0)
> +
> +#define PCIE_UL_REG_S_PHY_INIT_02	0x0104
> +#define  PCIE_UL_PHY0_SRAM_EXT_LD_DONE	BIT(0)
> +
> +#define PCIE_UL_REG_S_PHY_INIT_03	0x0108
> +#define  PCIE_UL_PHY0_SRAM_INIT_DONE	BIT(0)
> +
> +#define PCIE_UL_REG_S_INT_EVENT_MASK1	0x0138
> +#define  PCIE_UL_CFG_PME_INT		BIT(0)
> +#define  PCIE_UL_CFG_LINK_EQ_REQ_INT	BIT(1)
> +#define  PCIE_UL_EDMA_INT0		BIT(2)
> +#define  PCIE_UL_EDMA_INT1		BIT(3)
> +#define  PCIE_UL_EDMA_INT2		BIT(4)
> +#define  PCIE_UL_EDMA_INT3		BIT(5)
> +#define  PCIE_UL_S_INT_EVENT_MASK1_ALL  (PCIE_UL_CFG_PME_INT | PCIE_UL_CFG_LINK_EQ_REQ_INT | \
> +					 PCIE_UL_EDMA_INT0 | PCIE_UL_EDMA_INT1 | \
> +					 PCIE_UL_EDMA_INT2 | PCIE_UL_EDMA_INT3)
> +
> +#define PCIE_UL_REG_S_SB_MON		0x0198
> +#define PCIE_UL_REG_S_SIG_MON		0x019C
> +#define  PCIE_UL_CORE_RST_N_MON		BIT(0)
> +
> +#define PCIE_UL_REG_V_SII_DBG_00	0x0844
> +#define PCIE_UL_REG_V_SII_GEN_CTRL_01	0x0860
> +#define  PCIE_UL_APP_LTSSM_ENABLE	BIT(0)
> +
> +#define PCIE_UL_REG_V_PHY_ST_00		0x0864
> +#define  PCIE_UL_SMLH_LINK_UP		BIT(0)
> +
> +#define PCIE_UL_REG_V_PHY_ST_02		0x0868
> +#define  PCIE_UL_S_DETECT_ACT		0x01
> +#define  PCIE_UL_S_L0			0x11
> +
> +#define PISMU_CKON_PCIE			0x0038
> +#define  PISMU_CKON_PCIE_AUX_CLK	BIT(1)
> +#define  PISMU_CKON_PCIE_MSTR_ACLK	BIT(0)
> +
> +#define PISMU_RSOFF_PCIE		0x0538
> +#define  PISMU_RSOFF_PCIE_ULREG_RST_N	BIT(1)
> +#define  PISMU_RSOFF_PCIE_PWR_UP_RST_N	BIT(0)
> +
> +#define PCIE_MPU_REG_MP_EN		0x0
> +#define  MPU_MP_EN_DISABLE		BIT(0)
> +
> +#define PCIE_BUS_OFFSET			0x40000000
> +
> +/* Access registers in PCIe ulreg */
> +static inline void visconti_ulreg_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> +{
> +	writel(val, pcie->ulreg_base + reg);

Do these need ordering WRT DMA? If not, use _relaxed variant.

> +}
> +
> +/* Access registers in PCIe smu */
> +static inline void visconti_smu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> +{
> +	writel(val, pcie->smu_base + reg);
> +}
> +
> +/* Access registers in PCIe mpu */
> +static inline void visconti_mpu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> +{
> +	writel(val, pcie->mpu_base + reg);
> +}
> +
> +static inline u32 visconti_mpu_readl(struct visconti_pcie *pcie, u32 reg)
> +{
> +	return readl(pcie->mpu_base + reg);
> +}
> +
> +static int visconti_pcie_check_link_status(struct visconti_pcie *pcie)
> +{
> +	int err;
> +	u32 val;
> +
> +	/* wait for linkup of phy link layer */
> +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_00, val,
> +				 (val & PCIE_UL_SMLH_LINK_UP), 1000, 10000);
> +	if (err)
> +		return err;
> +
> +	/* wait for linkup of data link layer */
> +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
> +				 (val & PCIE_UL_S_DETECT_ACT), 1000, 10000);
> +	if (err)
> +		return err;
> +
> +	/* wait for LTSSM Status */
> +	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
> +				  (val & PCIE_UL_S_L0), 1000, 10000);
> +}
> +
> +static int visconti_pcie_establish_link(struct pcie_port *pp)
> +{
> +	int ret;
> +	u32 val;
> +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> +	struct visconti_pcie *pcie = dev_get_drvdata(pci->dev);
> +
> +	visconti_ulreg_writel(pcie, PCIE_UL_APP_LTSSM_ENABLE, PCIE_UL_REG_V_SII_GEN_CTRL_01);
> +
> +	ret = visconti_pcie_check_link_status(pcie);
> +	if (ret < 0) {
> +		dev_info(pci->dev, "Link failure\n");
> +		return ret;
> +	}
> +
> +	val = visconti_mpu_readl(pcie, PCIE_MPU_REG_MP_EN);
> +	visconti_mpu_writel(pcie, val & ~MPU_MP_EN_DISABLE, PCIE_MPU_REG_MP_EN);
> +
> +	visconti_ulreg_writel(pcie, PCIE_UL_S_INT_EVENT_MASK1_ALL, PCIE_UL_REG_S_INT_EVENT_MASK1);

Seems like all this should be a phy driver.

> +
> +	return 0;
> +}
> +
> +static int visconti_pcie_host_init(struct pcie_port *pp)
> +{
> +	int ret;
> +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> +
> +	dw_pcie_setup_rc(pp);

> +	ret = visconti_pcie_establish_link(pp);
> +	if (ret < 0)
> +		return ret;
> +
> +	dw_pcie_wait_for_link(pci);

The DWC core code does link handling now.

> +
> +	return 0;
> +}
> +
> +static const struct dw_pcie_host_ops visconti_pcie_host_ops = {
> +	.host_init = visconti_pcie_host_init,
> +};
> +
> +static u64 visconti_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 pci_addr)
> +{
> +	return pci_addr - PCIE_BUS_OFFSET;
> +}
> +
> +static const struct dw_pcie_ops dw_pcie_ops = {
> +	.cpu_addr_fixup = visconti_pcie_cpu_addr_fixup,
> +};
> +
> +static int visconti_get_resources(struct platform_device *pdev,
> +				  struct visconti_pcie *pcie)
> +{
> +	struct device *dev = &pdev->dev;
> +
> +	pcie->pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
> +	if (IS_ERR(pcie->pci->dbi_base))
> +		return PTR_ERR(pcie->pci->dbi_base);

The DWC core handles this now.

> +
> +	pcie->ulreg_base = devm_platform_ioremap_resource_byname(pdev, "ulreg");
> +	if (IS_ERR(pcie->ulreg_base))
> +		return PTR_ERR(pcie->ulreg_base);
> +
> +	pcie->smu_base = devm_platform_ioremap_resource_byname(pdev, "smu");
> +	if (IS_ERR(pcie->smu_base))
> +		return PTR_ERR(pcie->smu_base);
> +
> +	pcie->mpu_base = devm_platform_ioremap_resource_byname(pdev, "mpu");
> +	if (IS_ERR(pcie->mpu_base))
> +		return PTR_ERR(pcie->mpu_base);
> +
> +	pcie->refclk = devm_clk_get(dev, "pcie_refclk");
> +	if (IS_ERR(pcie->refclk)) {
> +		dev_err(dev, "Failed to get refclk clock: %ld\n", PTR_ERR(pcie->refclk));
> +		return PTR_ERR(pcie->refclk);
> +	}
> +
> +	pcie->sysclk = devm_clk_get(dev, "sysclk");
> +	if (IS_ERR(pcie->sysclk)) {
> +		dev_err(dev, "Failed to get sysclk clock: %ld\n", PTR_ERR(pcie->sysclk));
> +		return PTR_ERR(pcie->sysclk);
> +	}
> +
> +	pcie->auxclk = devm_clk_get(dev, "auxclk");
> +	if (IS_ERR(pcie->auxclk)) {
> +		dev_err(dev, "Failed to get auxclk clock: %ld\n", PTR_ERR(pcie->auxclk));
> +		return PTR_ERR(pcie->auxclk);
> +	}
> +
> +	return 0;
> +}
> +
> +static int visconti_device_turnon(struct visconti_pcie *pcie)
> +{
> +	int err;
> +	u32 val;
> +
> +	visconti_smu_writel(pcie, PISMU_CKON_PCIE_AUX_CLK | PISMU_CKON_PCIE_MSTR_ACLK,
> +			    PISMU_CKON_PCIE);

Clock control? Should be a clock provider then.

> +	ndelay(250);
> +
> +	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_ULREG_RST_N, PISMU_RSOFF_PCIE);
> +
> +	visconti_ulreg_writel(pcie, PCIE_UL_REG_S_PCIE_MODE_RC, PCIE_UL_REG_S_PCIE_MODE);
> +
> +	val = PCIE_UL_IOM_PCIE_PERSTN_I_EN | PCIE_UL_DIRECT_PERSTN_EN | PCIE_UL_DIRECT_PERSTN;
> +	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
> +	udelay(100);
> +
> +	val |= PCIE_UL_PERSTN_OUT;
> +	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
> +	udelay(100);
> +
> +	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_PWR_UP_RST_N, PISMU_RSOFF_PCIE);
> +
> +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_PHY_INIT_03, val,
> +				 (val & PCIE_UL_PHY0_SRAM_INIT_DONE), 100, 1000);
> +	if (err)
> +		return err;
> +
> +	visconti_ulreg_writel(pcie, PCIE_UL_PHY0_SRAM_EXT_LD_DONE, PCIE_UL_REG_S_PHY_INIT_02);
> +
> +	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_SIG_MON, val,
> +				 (val & PCIE_UL_CORE_RST_N_MON), 100, 1000);
> +}
> +
> +static int visconti_add_pcie_port(struct visconti_pcie *pcie, struct platform_device *pdev)
> +{
> +	struct dw_pcie *pci = pcie->pci;
> +	struct pcie_port *pp = &pci->pp;
> +	struct device *dev = &pdev->dev;
> +	int ret;
> +
> +	pp->irq = platform_get_irq_byname(pdev, "intr");
> +	if (pp->irq < 0) {
> +		dev_err(dev, "interrupt intr is missing");
> +		return pp->irq;
> +	}
> +
> +	if (IS_ENABLED(CONFIG_PCI_MSI)) {
> +		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
> +		if (pp->msi_irq < 0) {
> +			dev_err(dev, "interrupt msi is missing");
> +			return pp->msi_irq;
> +		}
> +	}

DWC core handles this now.

> +
> +	pp->ops = &visconti_pcie_host_ops;
> +
> +	pci->link_gen = of_pci_get_max_link_speed(pdev->dev.of_node);
> +	if (pci->link_gen < 0 || pci->link_gen > 3) {
> +		pci->link_gen = 3;
> +		dev_dbg(dev, "Applied default link speed\n");
> +	}
> +
> +	dev_dbg(dev, "link speed Gen %d", pci->link_gen);
> +
> +	ret = visconti_device_turnon(pcie);
> +	if (ret)
> +		goto error;
> +
> +	ret = dw_pcie_host_init(pp);
> +	if (ret)
> +		dev_err(dev, "Failed to initialize host\n");
> +
> +error:
> +	return ret;
> +}
> +
> +static int visconti_pcie_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct visconti_pcie *pcie;
> +	struct pcie_port *pp;
> +	struct dw_pcie *pci;
> +	int ret;
> +
> +	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36));
> +	if (ret)
> +		return ret;
> +
> +	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
> +	if (!pcie)
> +		return -ENOMEM;
> +
> +	pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
> +	if (!pci)
> +		return -ENOMEM;
> +
> +	pp = &pci->pp;
> +	pp->num_vectors = MAX_MSI_IRQS;
> +
> +	pci->dev = dev;
> +	pci->ops = &dw_pcie_ops;
> +	pcie->pci = pci;
> +
> +	ret = visconti_get_resources(pdev, pcie);
> +	if (ret)
> +		return ret;
> +
> +	platform_set_drvdata(pdev, pcie);
> +
> +	return visconti_add_pcie_port(pcie, pdev);
> +}
> +
> +static const struct of_device_id visconti_pcie_match[] = {
> +	{ .compatible = "toshiba,visconti-pcie" },
> +	{},
> +};
> +
> +static struct platform_driver visconti_pcie_driver = {
> +	.probe = visconti_pcie_probe,
> +	.driver = {
> +		.name = "visconti-pcie",
> +		.of_match_table = visconti_pcie_match,
> +		.suppress_bind_attrs = true,
> +	},
> +};
> +
> +builtin_platform_driver(visconti_pcie_driver);
> -- 
> 2.30.0.rc2
> 
> 
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Re: [PATCH 2/3] PCI: dwc: Visoconti: PCIe RC controller driver

[Nobuhiro Iwamatsu]

Hi,

Thanks for your review.

On Wed, Apr 07, 2021 at 09:27:34AM -0500, Rob Herring wrote:
> On Wed, Apr 07, 2021 at 12:18:38PM +0900, Nobuhiro Iwamatsu wrote:
> > Add support to PCIe RC controller on Toshiba Visconti ARM SoCs.
> > PCIe controller is based of Synopsys DesignWare PCIe core.
> > 
> > Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
> > Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> > ---
> >  drivers/pci/controller/dwc/Kconfig         |  10 +
> >  drivers/pci/controller/dwc/Makefile        |   1 +
> >  drivers/pci/controller/dwc/pcie-visconti.c | 358 +++++++++++++++++++++
> >  3 files changed, 369 insertions(+)
> >  create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c
> > 
> > diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> > index b9aaa84452c4..ae125d7cf375 100644
> > --- a/drivers/pci/controller/dwc/Kconfig
> > +++ b/drivers/pci/controller/dwc/Kconfig
> > @@ -286,6 +286,16 @@ config PCIE_TEGRA194_EP
> >  	  in order to enable device-specific features PCIE_TEGRA194_EP must be
> >  	  selected. This uses the DesignWare core.
> >  
> > +config PCIE_VISCONTI
> > +	bool "Toshiba VISCONTI PCIe controllers"
> > +	depends on ARCH_VISCONTI || COMPILE_TEST
> > +	depends on OF && HAS_IOMEM
> 
> Is this line really needed? Seems we have a mixture on other drivers.

hmm, thanks. I will remove this.

> 
> > +	depends on PCI_MSI_IRQ_DOMAIN
> > +	select PCIE_DW_HOST
> > +	help
> > +	  Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
> > +	  This driver supports TMPV77xx.
> > +
> >  config PCIE_UNIPHIER
> >  	bool "Socionext UniPhier PCIe host controllers"
> >  	depends on ARCH_UNIPHIER || COMPILE_TEST
> > diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
> > index ba7c42f6df6f..46ac5d49dc75 100644
> > --- a/drivers/pci/controller/dwc/Makefile
> > +++ b/drivers/pci/controller/dwc/Makefile
> > @@ -20,6 +20,7 @@ obj-$(CONFIG_PCI_MESON) += pci-meson.o
> >  obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
> >  obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
> >  obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
> > +obj-$(CONFIG_PCIE_VISCONTI) += pcie-visconti.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-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c
> > new file mode 100644
> > index 000000000000..e24f83df41b8
> > --- /dev/null
> > +++ b/drivers/pci/controller/dwc/pcie-visconti.c
> > @@ -0,0 +1,358 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * DWC PCIe RC driver for Toshiba Visconti ARM SoC
> > + *
> > + * Copyright (C) 2019, 2020 Toshiba Electronic Device & Storage Corporation
> > + * Copyright (C) 2020, TOSHIBA CORPORATION
> > + *
> > + * Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> > + *
> > + */
> > +
> > +#include <linux/clk.h>
> > +#include <linux/delay.h>
> > +#include <linux/gpio.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/init.h>
> > +#include <linux/iopoll.h>
> > +#include <linux/kernel.h>
> > +#include <linux/of_platform.h>
> > +#include <linux/pci.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/resource.h>
> > +#include <linux/types.h>
> > +
> > +#include "pcie-designware.h"
> > +#include "../../pci.h"
> > +
> > +struct visconti_pcie {
> > +	struct dw_pcie *pci;
> 
> Embed this rather than a pointer. 1 less alloc.

I see. I will change .

> 
> > +	void __iomem *ulreg_base;
> > +	void __iomem *smu_base;
> > +	void __iomem *mpu_base;
> > +	struct clk *refclk;
> > +	struct clk *sysclk;
> > +	struct clk *auxclk;
> > +};
> > +
> > +#define PCIE_UL_REG_S_PCIE_MODE		0x00F4
> > +#define  PCIE_UL_REG_S_PCIE_MODE_EP	0x00
> > +#define  PCIE_UL_REG_S_PCIE_MODE_RC	0x04
> > +
> > +#define PCIE_UL_REG_S_PERSTN_CTRL	0x00F8
> > +#define  PCIE_UL_IOM_PCIE_PERSTN_I_EN	BIT(3)
> > +#define  PCIE_UL_DIRECT_PERSTN_EN	BIT(2)
> > +#define  PCIE_UL_PERSTN_OUT		BIT(1)
> > +#define  PCIE_UL_DIRECT_PERSTN		BIT(0)
> > +
> > +#define PCIE_UL_REG_S_PHY_INIT_02	0x0104
> > +#define  PCIE_UL_PHY0_SRAM_EXT_LD_DONE	BIT(0)
> > +
> > +#define PCIE_UL_REG_S_PHY_INIT_03	0x0108
> > +#define  PCIE_UL_PHY0_SRAM_INIT_DONE	BIT(0)
> > +
> > +#define PCIE_UL_REG_S_INT_EVENT_MASK1	0x0138
> > +#define  PCIE_UL_CFG_PME_INT		BIT(0)
> > +#define  PCIE_UL_CFG_LINK_EQ_REQ_INT	BIT(1)
> > +#define  PCIE_UL_EDMA_INT0		BIT(2)
> > +#define  PCIE_UL_EDMA_INT1		BIT(3)
> > +#define  PCIE_UL_EDMA_INT2		BIT(4)
> > +#define  PCIE_UL_EDMA_INT3		BIT(5)
> > +#define  PCIE_UL_S_INT_EVENT_MASK1_ALL  (PCIE_UL_CFG_PME_INT | PCIE_UL_CFG_LINK_EQ_REQ_INT | \
> > +					 PCIE_UL_EDMA_INT0 | PCIE_UL_EDMA_INT1 | \
> > +					 PCIE_UL_EDMA_INT2 | PCIE_UL_EDMA_INT3)
> > +
> > +#define PCIE_UL_REG_S_SB_MON		0x0198
> > +#define PCIE_UL_REG_S_SIG_MON		0x019C
> > +#define  PCIE_UL_CORE_RST_N_MON		BIT(0)
> > +
> > +#define PCIE_UL_REG_V_SII_DBG_00	0x0844
> > +#define PCIE_UL_REG_V_SII_GEN_CTRL_01	0x0860
> > +#define  PCIE_UL_APP_LTSSM_ENABLE	BIT(0)
> > +
> > +#define PCIE_UL_REG_V_PHY_ST_00		0x0864
> > +#define  PCIE_UL_SMLH_LINK_UP		BIT(0)
> > +
> > +#define PCIE_UL_REG_V_PHY_ST_02		0x0868
> > +#define  PCIE_UL_S_DETECT_ACT		0x01
> > +#define  PCIE_UL_S_L0			0x11
> > +
> > +#define PISMU_CKON_PCIE			0x0038
> > +#define  PISMU_CKON_PCIE_AUX_CLK	BIT(1)
> > +#define  PISMU_CKON_PCIE_MSTR_ACLK	BIT(0)
> > +
> > +#define PISMU_RSOFF_PCIE		0x0538
> > +#define  PISMU_RSOFF_PCIE_ULREG_RST_N	BIT(1)
> > +#define  PISMU_RSOFF_PCIE_PWR_UP_RST_N	BIT(0)
> > +
> > +#define PCIE_MPU_REG_MP_EN		0x0
> > +#define  MPU_MP_EN_DISABLE		BIT(0)
> > +
> > +#define PCIE_BUS_OFFSET			0x40000000
> > +
> > +/* Access registers in PCIe ulreg */
> > +static inline void visconti_ulreg_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> > +{
> > +	writel(val, pcie->ulreg_base + reg);
> 
> Do these need ordering WRT DMA? If not, use _relaxed variant.

This and others does not required WRT DMA. I will change to use _relaxed functions.

> 
> > +}
> > +
> > +/* Access registers in PCIe smu */
> > +static inline void visconti_smu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> > +{
> > +	writel(val, pcie->smu_base + reg);
> > +}
> > +
> > +/* Access registers in PCIe mpu */
> > +static inline void visconti_mpu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> > +{
> > +	writel(val, pcie->mpu_base + reg);
> > +}
> > +
> > +static inline u32 visconti_mpu_readl(struct visconti_pcie *pcie, u32 reg)
> > +{
> > +	return readl(pcie->mpu_base + reg);
> > +}
> > +
> > +static int visconti_pcie_check_link_status(struct visconti_pcie *pcie)
> > +{
> > +	int err;
> > +	u32 val;
> > +
> > +	/* wait for linkup of phy link layer */
> > +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_00, val,
> > +				 (val & PCIE_UL_SMLH_LINK_UP), 1000, 10000);
> > +	if (err)
> > +		return err;
> > +
> > +	/* wait for linkup of data link layer */
> > +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
> > +				 (val & PCIE_UL_S_DETECT_ACT), 1000, 10000);
> > +	if (err)
> > +		return err;
> > +
> > +	/* wait for LTSSM Status */
> > +	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
> > +				  (val & PCIE_UL_S_L0), 1000, 10000);
> > +}
> > +
> > +static int visconti_pcie_establish_link(struct pcie_port *pp)
> > +{
> > +	int ret;
> > +	u32 val;
> > +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> > +	struct visconti_pcie *pcie = dev_get_drvdata(pci->dev);
> > +
> > +	visconti_ulreg_writel(pcie, PCIE_UL_APP_LTSSM_ENABLE, PCIE_UL_REG_V_SII_GEN_CTRL_01);
> > +
> > +	ret = visconti_pcie_check_link_status(pcie);
> > +	if (ret < 0) {
> > +		dev_info(pci->dev, "Link failure\n");
> > +		return ret;
> > +	}
> > +
> > +	val = visconti_mpu_readl(pcie, PCIE_MPU_REG_MP_EN);
> > +	visconti_mpu_writel(pcie, val & ~MPU_MP_EN_DISABLE, PCIE_MPU_REG_MP_EN);
> > +
> > +	visconti_ulreg_writel(pcie, PCIE_UL_S_INT_EVENT_MASK1_ALL, PCIE_UL_REG_S_INT_EVENT_MASK1);
> 
> Seems like all this should be a phy driver.
> 

I see. I will consider if it can be replaced with a phy driver.


> > +
> > +	return 0;
> > +}
> > +
> > +static int visconti_pcie_host_init(struct pcie_port *pp)
> > +{
> > +	int ret;
> > +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> > +
> > +	dw_pcie_setup_rc(pp);
> 
> > +	ret = visconti_pcie_establish_link(pp);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	dw_pcie_wait_for_link(pci);
> 
> The DWC core code does link handling now.
> 

OK, I will check this.

> > +
> > +	return 0;
> > +}
> > +
> > +static const struct dw_pcie_host_ops visconti_pcie_host_ops = {
> > +	.host_init = visconti_pcie_host_init,
> > +};
> > +
> > +static u64 visconti_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 pci_addr)
> > +{
> > +	return pci_addr - PCIE_BUS_OFFSET;
> > +}
> > +
> > +static const struct dw_pcie_ops dw_pcie_ops = {
> > +	.cpu_addr_fixup = visconti_pcie_cpu_addr_fixup,
> > +};
> > +
> > +static int visconti_get_resources(struct platform_device *pdev,
> > +				  struct visconti_pcie *pcie)
> > +{
> > +	struct device *dev = &pdev->dev;
> > +
> > +	pcie->pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
> > +	if (IS_ERR(pcie->pci->dbi_base))
> > +		return PTR_ERR(pcie->pci->dbi_base);
> 
> The DWC core handles this now.

OK, I will drop this.

> 
> > +
> > +	pcie->ulreg_base = devm_platform_ioremap_resource_byname(pdev, "ulreg");
> > +	if (IS_ERR(pcie->ulreg_base))
> > +		return PTR_ERR(pcie->ulreg_base);
> > +
> > +	pcie->smu_base = devm_platform_ioremap_resource_byname(pdev, "smu");
> > +	if (IS_ERR(pcie->smu_base))
> > +		return PTR_ERR(pcie->smu_base);
> > +
> > +	pcie->mpu_base = devm_platform_ioremap_resource_byname(pdev, "mpu");
> > +	if (IS_ERR(pcie->mpu_base))
> > +		return PTR_ERR(pcie->mpu_base);
> > +
> > +	pcie->refclk = devm_clk_get(dev, "pcie_refclk");
> > +	if (IS_ERR(pcie->refclk)) {
> > +		dev_err(dev, "Failed to get refclk clock: %ld\n", PTR_ERR(pcie->refclk));
> > +		return PTR_ERR(pcie->refclk);
> > +	}
> > +
> > +	pcie->sysclk = devm_clk_get(dev, "sysclk");
> > +	if (IS_ERR(pcie->sysclk)) {
> > +		dev_err(dev, "Failed to get sysclk clock: %ld\n", PTR_ERR(pcie->sysclk));
> > +		return PTR_ERR(pcie->sysclk);
> > +	}
> > +
> > +	pcie->auxclk = devm_clk_get(dev, "auxclk");
> > +	if (IS_ERR(pcie->auxclk)) {
> > +		dev_err(dev, "Failed to get auxclk clock: %ld\n", PTR_ERR(pcie->auxclk));
> > +		return PTR_ERR(pcie->auxclk);
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int visconti_device_turnon(struct visconti_pcie *pcie)
> > +{
> > +	int err;
> > +	u32 val;
> > +
> > +	visconti_smu_writel(pcie, PISMU_CKON_PCIE_AUX_CLK | PISMU_CKON_PCIE_MSTR_ACLK,
> > +			    PISMU_CKON_PCIE);
> 
> Clock control? Should be a clock provider then.
> 

Visconti does not have clock driver yet, I'm also developping a driver for this,
but it's still in the process. I plan to replace it with a clock driver later.
And I should have written this in the commit message.


> > +	ndelay(250);
> > +
> > +	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_ULREG_RST_N, PISMU_RSOFF_PCIE);
> > +
> > +	visconti_ulreg_writel(pcie, PCIE_UL_REG_S_PCIE_MODE_RC, PCIE_UL_REG_S_PCIE_MODE);
> > +
> > +	val = PCIE_UL_IOM_PCIE_PERSTN_I_EN | PCIE_UL_DIRECT_PERSTN_EN | PCIE_UL_DIRECT_PERSTN;
> > +	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
> > +	udelay(100);
> > +
> > +	val |= PCIE_UL_PERSTN_OUT;
> > +	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
> > +	udelay(100);
> > +
> > +	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_PWR_UP_RST_N, PISMU_RSOFF_PCIE);
> > +
> > +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_PHY_INIT_03, val,
> > +				 (val & PCIE_UL_PHY0_SRAM_INIT_DONE), 100, 1000);
> > +	if (err)
> > +		return err;
> > +
> > +	visconti_ulreg_writel(pcie, PCIE_UL_PHY0_SRAM_EXT_LD_DONE, PCIE_UL_REG_S_PHY_INIT_02);
> > +
> > +	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_SIG_MON, val,
> > +				 (val & PCIE_UL_CORE_RST_N_MON), 100, 1000);
> > +}
> > +
> > +static int visconti_add_pcie_port(struct visconti_pcie *pcie, struct platform_device *pdev)
> > +{
> > +	struct dw_pcie *pci = pcie->pci;
> > +	struct pcie_port *pp = &pci->pp;
> > +	struct device *dev = &pdev->dev;
> > +	int ret;
> > +
> > +	pp->irq = platform_get_irq_byname(pdev, "intr");
> > +	if (pp->irq < 0) {
> > +		dev_err(dev, "interrupt intr is missing");
> > +		return pp->irq;
> > +	}
> > +
> > +	if (IS_ENABLED(CONFIG_PCI_MSI)) {
> > +		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
> > +		if (pp->msi_irq < 0) {
> > +			dev_err(dev, "interrupt msi is missing");
> > +			return pp->msi_irq;
> > +		}
> > +	}
> 
> DWC core handles this now.

OK, I will drop this.

Best regards,
  Nobuhiro

Re: [PATCH 2/3] PCI: dwc: Visoconti: PCIe RC controller driver

[Nobuhiro Iwamatsu]

Hi,

Thanks for your review.

On Wed, Apr 07, 2021 at 09:27:34AM -0500, Rob Herring wrote:
> On Wed, Apr 07, 2021 at 12:18:38PM +0900, Nobuhiro Iwamatsu wrote:
> > Add support to PCIe RC controller on Toshiba Visconti ARM SoCs.
> > PCIe controller is based of Synopsys DesignWare PCIe core.
> > 
> > Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@toshiba.co.jp>
> > Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> > ---
> >  drivers/pci/controller/dwc/Kconfig         |  10 +
> >  drivers/pci/controller/dwc/Makefile        |   1 +
> >  drivers/pci/controller/dwc/pcie-visconti.c | 358 +++++++++++++++++++++
> >  3 files changed, 369 insertions(+)
> >  create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c
> > 
> > diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> > index b9aaa84452c4..ae125d7cf375 100644
> > --- a/drivers/pci/controller/dwc/Kconfig
> > +++ b/drivers/pci/controller/dwc/Kconfig
> > @@ -286,6 +286,16 @@ config PCIE_TEGRA194_EP
> >  	  in order to enable device-specific features PCIE_TEGRA194_EP must be
> >  	  selected. This uses the DesignWare core.
> >  
> > +config PCIE_VISCONTI
> > +	bool "Toshiba VISCONTI PCIe controllers"
> > +	depends on ARCH_VISCONTI || COMPILE_TEST
> > +	depends on OF && HAS_IOMEM
> 
> Is this line really needed? Seems we have a mixture on other drivers.

hmm, thanks. I will remove this.

> 
> > +	depends on PCI_MSI_IRQ_DOMAIN
> > +	select PCIE_DW_HOST
> > +	help
> > +	  Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
> > +	  This driver supports TMPV77xx.
> > +
> >  config PCIE_UNIPHIER
> >  	bool "Socionext UniPhier PCIe host controllers"
> >  	depends on ARCH_UNIPHIER || COMPILE_TEST
> > diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
> > index ba7c42f6df6f..46ac5d49dc75 100644
> > --- a/drivers/pci/controller/dwc/Makefile
> > +++ b/drivers/pci/controller/dwc/Makefile
> > @@ -20,6 +20,7 @@ obj-$(CONFIG_PCI_MESON) += pci-meson.o
> >  obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
> >  obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
> >  obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
> > +obj-$(CONFIG_PCIE_VISCONTI) += pcie-visconti.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-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c
> > new file mode 100644
> > index 000000000000..e24f83df41b8
> > --- /dev/null
> > +++ b/drivers/pci/controller/dwc/pcie-visconti.c
> > @@ -0,0 +1,358 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * DWC PCIe RC driver for Toshiba Visconti ARM SoC
> > + *
> > + * Copyright (C) 2019, 2020 Toshiba Electronic Device & Storage Corporation
> > + * Copyright (C) 2020, TOSHIBA CORPORATION
> > + *
> > + * Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
> > + *
> > + */
> > +
> > +#include <linux/clk.h>
> > +#include <linux/delay.h>
> > +#include <linux/gpio.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/init.h>
> > +#include <linux/iopoll.h>
> > +#include <linux/kernel.h>
> > +#include <linux/of_platform.h>
> > +#include <linux/pci.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/resource.h>
> > +#include <linux/types.h>
> > +
> > +#include "pcie-designware.h"
> > +#include "../../pci.h"
> > +
> > +struct visconti_pcie {
> > +	struct dw_pcie *pci;
> 
> Embed this rather than a pointer. 1 less alloc.

I see. I will change .

> 
> > +	void __iomem *ulreg_base;
> > +	void __iomem *smu_base;
> > +	void __iomem *mpu_base;
> > +	struct clk *refclk;
> > +	struct clk *sysclk;
> > +	struct clk *auxclk;
> > +};
> > +
> > +#define PCIE_UL_REG_S_PCIE_MODE		0x00F4
> > +#define  PCIE_UL_REG_S_PCIE_MODE_EP	0x00
> > +#define  PCIE_UL_REG_S_PCIE_MODE_RC	0x04
> > +
> > +#define PCIE_UL_REG_S_PERSTN_CTRL	0x00F8
> > +#define  PCIE_UL_IOM_PCIE_PERSTN_I_EN	BIT(3)
> > +#define  PCIE_UL_DIRECT_PERSTN_EN	BIT(2)
> > +#define  PCIE_UL_PERSTN_OUT		BIT(1)
> > +#define  PCIE_UL_DIRECT_PERSTN		BIT(0)
> > +
> > +#define PCIE_UL_REG_S_PHY_INIT_02	0x0104
> > +#define  PCIE_UL_PHY0_SRAM_EXT_LD_DONE	BIT(0)
> > +
> > +#define PCIE_UL_REG_S_PHY_INIT_03	0x0108
> > +#define  PCIE_UL_PHY0_SRAM_INIT_DONE	BIT(0)
> > +
> > +#define PCIE_UL_REG_S_INT_EVENT_MASK1	0x0138
> > +#define  PCIE_UL_CFG_PME_INT		BIT(0)
> > +#define  PCIE_UL_CFG_LINK_EQ_REQ_INT	BIT(1)
> > +#define  PCIE_UL_EDMA_INT0		BIT(2)
> > +#define  PCIE_UL_EDMA_INT1		BIT(3)
> > +#define  PCIE_UL_EDMA_INT2		BIT(4)
> > +#define  PCIE_UL_EDMA_INT3		BIT(5)
> > +#define  PCIE_UL_S_INT_EVENT_MASK1_ALL  (PCIE_UL_CFG_PME_INT | PCIE_UL_CFG_LINK_EQ_REQ_INT | \
> > +					 PCIE_UL_EDMA_INT0 | PCIE_UL_EDMA_INT1 | \
> > +					 PCIE_UL_EDMA_INT2 | PCIE_UL_EDMA_INT3)
> > +
> > +#define PCIE_UL_REG_S_SB_MON		0x0198
> > +#define PCIE_UL_REG_S_SIG_MON		0x019C
> > +#define  PCIE_UL_CORE_RST_N_MON		BIT(0)
> > +
> > +#define PCIE_UL_REG_V_SII_DBG_00	0x0844
> > +#define PCIE_UL_REG_V_SII_GEN_CTRL_01	0x0860
> > +#define  PCIE_UL_APP_LTSSM_ENABLE	BIT(0)
> > +
> > +#define PCIE_UL_REG_V_PHY_ST_00		0x0864
> > +#define  PCIE_UL_SMLH_LINK_UP		BIT(0)
> > +
> > +#define PCIE_UL_REG_V_PHY_ST_02		0x0868
> > +#define  PCIE_UL_S_DETECT_ACT		0x01
> > +#define  PCIE_UL_S_L0			0x11
> > +
> > +#define PISMU_CKON_PCIE			0x0038
> > +#define  PISMU_CKON_PCIE_AUX_CLK	BIT(1)
> > +#define  PISMU_CKON_PCIE_MSTR_ACLK	BIT(0)
> > +
> > +#define PISMU_RSOFF_PCIE		0x0538
> > +#define  PISMU_RSOFF_PCIE_ULREG_RST_N	BIT(1)
> > +#define  PISMU_RSOFF_PCIE_PWR_UP_RST_N	BIT(0)
> > +
> > +#define PCIE_MPU_REG_MP_EN		0x0
> > +#define  MPU_MP_EN_DISABLE		BIT(0)
> > +
> > +#define PCIE_BUS_OFFSET			0x40000000
> > +
> > +/* Access registers in PCIe ulreg */
> > +static inline void visconti_ulreg_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> > +{
> > +	writel(val, pcie->ulreg_base + reg);
> 
> Do these need ordering WRT DMA? If not, use _relaxed variant.

This and others does not required WRT DMA. I will change to use _relaxed functions.

> 
> > +}
> > +
> > +/* Access registers in PCIe smu */
> > +static inline void visconti_smu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> > +{
> > +	writel(val, pcie->smu_base + reg);
> > +}
> > +
> > +/* Access registers in PCIe mpu */
> > +static inline void visconti_mpu_writel(struct visconti_pcie *pcie, u32 val, u32 reg)
> > +{
> > +	writel(val, pcie->mpu_base + reg);
> > +}
> > +
> > +static inline u32 visconti_mpu_readl(struct visconti_pcie *pcie, u32 reg)
> > +{
> > +	return readl(pcie->mpu_base + reg);
> > +}
> > +
> > +static int visconti_pcie_check_link_status(struct visconti_pcie *pcie)
> > +{
> > +	int err;
> > +	u32 val;
> > +
> > +	/* wait for linkup of phy link layer */
> > +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_00, val,
> > +				 (val & PCIE_UL_SMLH_LINK_UP), 1000, 10000);
> > +	if (err)
> > +		return err;
> > +
> > +	/* wait for linkup of data link layer */
> > +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
> > +				 (val & PCIE_UL_S_DETECT_ACT), 1000, 10000);
> > +	if (err)
> > +		return err;
> > +
> > +	/* wait for LTSSM Status */
> > +	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_V_PHY_ST_02, val,
> > +				  (val & PCIE_UL_S_L0), 1000, 10000);
> > +}
> > +
> > +static int visconti_pcie_establish_link(struct pcie_port *pp)
> > +{
> > +	int ret;
> > +	u32 val;
> > +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> > +	struct visconti_pcie *pcie = dev_get_drvdata(pci->dev);
> > +
> > +	visconti_ulreg_writel(pcie, PCIE_UL_APP_LTSSM_ENABLE, PCIE_UL_REG_V_SII_GEN_CTRL_01);
> > +
> > +	ret = visconti_pcie_check_link_status(pcie);
> > +	if (ret < 0) {
> > +		dev_info(pci->dev, "Link failure\n");
> > +		return ret;
> > +	}
> > +
> > +	val = visconti_mpu_readl(pcie, PCIE_MPU_REG_MP_EN);
> > +	visconti_mpu_writel(pcie, val & ~MPU_MP_EN_DISABLE, PCIE_MPU_REG_MP_EN);
> > +
> > +	visconti_ulreg_writel(pcie, PCIE_UL_S_INT_EVENT_MASK1_ALL, PCIE_UL_REG_S_INT_EVENT_MASK1);
> 
> Seems like all this should be a phy driver.
> 

I see. I will consider if it can be replaced with a phy driver.


> > +
> > +	return 0;
> > +}
> > +
> > +static int visconti_pcie_host_init(struct pcie_port *pp)
> > +{
> > +	int ret;
> > +	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> > +
> > +	dw_pcie_setup_rc(pp);
> 
> > +	ret = visconti_pcie_establish_link(pp);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	dw_pcie_wait_for_link(pci);
> 
> The DWC core code does link handling now.
> 

OK, I will check this.

> > +
> > +	return 0;
> > +}
> > +
> > +static const struct dw_pcie_host_ops visconti_pcie_host_ops = {
> > +	.host_init = visconti_pcie_host_init,
> > +};
> > +
> > +static u64 visconti_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 pci_addr)
> > +{
> > +	return pci_addr - PCIE_BUS_OFFSET;
> > +}
> > +
> > +static const struct dw_pcie_ops dw_pcie_ops = {
> > +	.cpu_addr_fixup = visconti_pcie_cpu_addr_fixup,
> > +};
> > +
> > +static int visconti_get_resources(struct platform_device *pdev,
> > +				  struct visconti_pcie *pcie)
> > +{
> > +	struct device *dev = &pdev->dev;
> > +
> > +	pcie->pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
> > +	if (IS_ERR(pcie->pci->dbi_base))
> > +		return PTR_ERR(pcie->pci->dbi_base);
> 
> The DWC core handles this now.

OK, I will drop this.

> 
> > +
> > +	pcie->ulreg_base = devm_platform_ioremap_resource_byname(pdev, "ulreg");
> > +	if (IS_ERR(pcie->ulreg_base))
> > +		return PTR_ERR(pcie->ulreg_base);
> > +
> > +	pcie->smu_base = devm_platform_ioremap_resource_byname(pdev, "smu");
> > +	if (IS_ERR(pcie->smu_base))
> > +		return PTR_ERR(pcie->smu_base);
> > +
> > +	pcie->mpu_base = devm_platform_ioremap_resource_byname(pdev, "mpu");
> > +	if (IS_ERR(pcie->mpu_base))
> > +		return PTR_ERR(pcie->mpu_base);
> > +
> > +	pcie->refclk = devm_clk_get(dev, "pcie_refclk");
> > +	if (IS_ERR(pcie->refclk)) {
> > +		dev_err(dev, "Failed to get refclk clock: %ld\n", PTR_ERR(pcie->refclk));
> > +		return PTR_ERR(pcie->refclk);
> > +	}
> > +
> > +	pcie->sysclk = devm_clk_get(dev, "sysclk");
> > +	if (IS_ERR(pcie->sysclk)) {
> > +		dev_err(dev, "Failed to get sysclk clock: %ld\n", PTR_ERR(pcie->sysclk));
> > +		return PTR_ERR(pcie->sysclk);
> > +	}
> > +
> > +	pcie->auxclk = devm_clk_get(dev, "auxclk");
> > +	if (IS_ERR(pcie->auxclk)) {
> > +		dev_err(dev, "Failed to get auxclk clock: %ld\n", PTR_ERR(pcie->auxclk));
> > +		return PTR_ERR(pcie->auxclk);
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int visconti_device_turnon(struct visconti_pcie *pcie)
> > +{
> > +	int err;
> > +	u32 val;
> > +
> > +	visconti_smu_writel(pcie, PISMU_CKON_PCIE_AUX_CLK | PISMU_CKON_PCIE_MSTR_ACLK,
> > +			    PISMU_CKON_PCIE);
> 
> Clock control? Should be a clock provider then.
> 

Visconti does not have clock driver yet, I'm also developping a driver for this,
but it's still in the process. I plan to replace it with a clock driver later.
And I should have written this in the commit message.


> > +	ndelay(250);
> > +
> > +	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_ULREG_RST_N, PISMU_RSOFF_PCIE);
> > +
> > +	visconti_ulreg_writel(pcie, PCIE_UL_REG_S_PCIE_MODE_RC, PCIE_UL_REG_S_PCIE_MODE);
> > +
> > +	val = PCIE_UL_IOM_PCIE_PERSTN_I_EN | PCIE_UL_DIRECT_PERSTN_EN | PCIE_UL_DIRECT_PERSTN;
> > +	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
> > +	udelay(100);
> > +
> > +	val |= PCIE_UL_PERSTN_OUT;
> > +	visconti_ulreg_writel(pcie, val, PCIE_UL_REG_S_PERSTN_CTRL);
> > +	udelay(100);
> > +
> > +	visconti_smu_writel(pcie, PISMU_RSOFF_PCIE_PWR_UP_RST_N, PISMU_RSOFF_PCIE);
> > +
> > +	err = readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_PHY_INIT_03, val,
> > +				 (val & PCIE_UL_PHY0_SRAM_INIT_DONE), 100, 1000);
> > +	if (err)
> > +		return err;
> > +
> > +	visconti_ulreg_writel(pcie, PCIE_UL_PHY0_SRAM_EXT_LD_DONE, PCIE_UL_REG_S_PHY_INIT_02);
> > +
> > +	return readl_poll_timeout(pcie->ulreg_base + PCIE_UL_REG_S_SIG_MON, val,
> > +				 (val & PCIE_UL_CORE_RST_N_MON), 100, 1000);
> > +}
> > +
> > +static int visconti_add_pcie_port(struct visconti_pcie *pcie, struct platform_device *pdev)
> > +{
> > +	struct dw_pcie *pci = pcie->pci;
> > +	struct pcie_port *pp = &pci->pp;
> > +	struct device *dev = &pdev->dev;
> > +	int ret;
> > +
> > +	pp->irq = platform_get_irq_byname(pdev, "intr");
> > +	if (pp->irq < 0) {
> > +		dev_err(dev, "interrupt intr is missing");
> > +		return pp->irq;
> > +	}
> > +
> > +	if (IS_ENABLED(CONFIG_PCI_MSI)) {
> > +		pp->msi_irq = platform_get_irq_byname(pdev, "msi");
> > +		if (pp->msi_irq < 0) {
> > +			dev_err(dev, "interrupt msi is missing");
> > +			return pp->msi_irq;
> > +		}
> > +	}
> 
> DWC core handles this now.

OK, I will drop this.

Best regards,
  Nobuhiro


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[PATCH 3/3] MAINTAINERS: Add entries for Toshiba Visconti PCIe controller

[Nobuhiro Iwamatsu]

Add entries for Toshiba Visconti PCIe controller binding and driver.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
---
 MAINTAINERS | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 8a154939ae27..3e5187c5b8d2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2621,11 +2621,13 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/iwamatsu/linux-visconti.git
 F:	Documentation/devicetree/bindings/arm/toshiba.yaml
 F:	Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
 F:	Documentation/devicetree/bindings/gpio/toshiba,gpio-visconti.yaml
+F:	Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
 F:	Documentation/devicetree/bindings/pinctrl/toshiba,tmpv7700-pinctrl.yaml
 F:	Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml
 F:	arch/arm64/boot/dts/toshiba/
 F:	drivers/net/ethernet/stmicro/stmmac/dwmac-visconti.c
 F:	drivers/gpio/gpio-visconti.c
+F:	drivers/pci/controller/dwc/pcie-visconti.c
 F:	drivers/pinctrl/visconti/
 F:	drivers/watchdog/visconti_wdt.c
 N:	visconti
-- 
2.30.0.rc2

[PATCH 3/3] MAINTAINERS: Add entries for Toshiba Visconti PCIe controller

[Nobuhiro Iwamatsu]

Add entries for Toshiba Visconti PCIe controller binding and driver.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
---
 MAINTAINERS | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 8a154939ae27..3e5187c5b8d2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2621,11 +2621,13 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/iwamatsu/linux-visconti.git
 F:	Documentation/devicetree/bindings/arm/toshiba.yaml
 F:	Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
 F:	Documentation/devicetree/bindings/gpio/toshiba,gpio-visconti.yaml
+F:	Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
 F:	Documentation/devicetree/bindings/pinctrl/toshiba,tmpv7700-pinctrl.yaml
 F:	Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml
 F:	arch/arm64/boot/dts/toshiba/
 F:	drivers/net/ethernet/stmicro/stmmac/dwmac-visconti.c
 F:	drivers/gpio/gpio-visconti.c
+F:	drivers/pci/controller/dwc/pcie-visconti.c
 F:	drivers/pinctrl/visconti/
 F:	drivers/watchdog/visconti_wdt.c
 N:	visconti
-- 
2.30.0.rc2


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Re: [PATCH 2/3] PCI: dwc: Visoconti: PCIe RC controller driver

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 1996 bytes --]

CC: kbuild-all(a)lists.01.org
In-Reply-To: <20210407031839.386088-3-nobuhiro1.iwamatsu@toshiba.co.jp>
References: <20210407031839.386088-3-nobuhiro1.iwamatsu@toshiba.co.jp>
TO: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
TO: Bjorn Helgaas <helgaas@kernel.org>
TO: Rob Herring <robh+dt@kernel.org>
TO: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
CC: linux-pci(a)vger.kernel.org
CC: punit1.agrawal(a)toshiba.co.jp
CC: yuji2.ishikawa(a)toshiba.co.jp
CC: linux-arm-kernel(a)lists.infradead.org
CC: linux-kernel(a)vger.kernel.org
CC: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>

Hi Nobuhiro,

I love your patch! Perhaps something to improve:

[auto build test WARNING on pci/next]
[also build test WARNING on robh/for-next linus/master v5.12-rc6 next-20210407]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Nobuhiro-Iwamatsu/PCI-dwc-Visoconti-PCIe-RC-controller-driver/20210407-112059
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
:::::: branch date: 16 hours ago
:::::: commit date: 16 hours ago
config: riscv-allyesconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>


cocci warnings: (new ones prefixed by >>)
>> drivers/pci/controller/dwc/pcie-visconti.c:274:2-9: line 274 is redundant because platform_get_irq() already prints an error
   drivers/pci/controller/dwc/pcie-visconti.c:281:3-10: line 281 is redundant because platform_get_irq() already prints an error

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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