linux/Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (c) 2020 MediaTek
%YAML 1.2
---
$id: http://devicetree.org/schemas/usb/mediatek,mtu3.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: MediaTek USB3 DRD Controller

maintainers:
  - Chunfeng Yun <chunfeng.yun@mediatek.com>

allOf:
  - $ref: "usb-drd.yaml"

description: |
  The DRD controller has a glue layer IPPC (IP Port Control), and its host is
  based on xHCI.  

properties:
  compatible:
    items:
      - enum:
          - mediatek,mt2712-mtu3
          - mediatek,mt8173-mtu3
          - mediatek,mt8183-mtu3
          - mediatek,mt8188-mtu3
          - mediatek,mt8192-mtu3
          - mediatek,mt8195-mtu3
      - const: mediatek,mtu3

  reg:
    items:
      - description: the registers of device MAC
      - description: the registers of IP Port Control

  reg-names:
    items:
      - const: mac
      - const: ippc

  interrupts:
    description:
      use "interrupts-extended" when the interrupts are connected to the
      separate interrupt controllers
    minItems: 1
    items:
      - description: SSUSB device controller interrupt
      - description: optional, wakeup interrupt used to support runtime PM

  interrupt-names:
    items:
      - const: device
      - const: wakeup

  power-domains:
    description: A phandle to USB power domain node to control USB's MTCMOS
    maxItems: 1

  clocks:
    minItems: 1
    items:
      - description: Controller clock used by normal mode
      - description: Reference clock used by low power mode etc
      - description: Mcu bus clock for register access
      - description: DMA bus clock for data transfer

  clock-names:
    minItems: 1
    items:
      - const: sys_ck  # required, others are optional
      - const: ref_ck
      - const: mcu_ck
      - const: dma_ck

  phys:
    description:
      List of all the USB PHYs used, it's better to keep the sequence
      as the hardware layout.
    minItems: 1
    items:
      - description: USB2/HS PHY    # required, others are optional
      - description: USB3/SS(P) PHY
      - description: USB2/HS PHY    # the following for backward compatible
      - description: USB3/SS(P) PHY
      - description: USB2/HS PHY
      - description: USB3/SS(P) PHY
      - description: USB2/HS PHY
      - description: USB3/SS(P) PHY
      - description: USB2/HS PHY

  vusb33-supply:
    description: Regulator of USB AVDD3.3v

  vbus-supply:
    deprecated: true
    description: |
      Regulator of USB VBUS5v, needed when supports dual-role mode.
      Particularly, if use an output GPIO to control a VBUS regulator, should
      model it as a regulator. See bindings/regulator/fixed-regulator.yaml
      It's considered valid for compatibility reasons, not allowed for
      new bindings, and put into a usb-connector node.      

  dr_mode:
    enum: [host, peripheral, otg]
    default: otg

  maximum-speed:
    enum: [super-speed-plus, super-speed, high-speed, full-speed]

  resets:
    maxItems: 1

  "#address-cells":
    enum: [1, 2]

  "#size-cells":
    enum: [1, 2]

  ranges: true

  extcon:
    deprecated: true
    description: |
      Phandle to the extcon device detecting the IDDIG state, needed
      when supports dual-role mode.
      It's considered valid for compatibility reasons, not allowed for
      new bindings, and use "usb-role-switch" property instead.      

  usb-role-switch:
    $ref: /schemas/types.yaml#/definitions/flag
    description: Support role switch.
    type: boolean

  role-switch-default-mode:
    enum: [host, peripheral]
    default: host

  connector:
    $ref: /schemas/connector/usb-connector.yaml#
    description:
      Connector for dual role switch, especially for "gpio-usb-b-connector"
    type: object

  port:
    description:
      Any connector to the data bus of this controller should be modelled
      using the OF graph bindings specified, if the "usb-role-switch"
      property is used. See graph.txt
    $ref: /schemas/graph.yaml#/properties/port

  enable-manual-drd:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      supports manual dual-role switch via debugfs; usually used when
      receptacle is TYPE-A and also wants to support dual-role mode.
    type: boolean

  wakeup-source:
    description: enable USB remote wakeup, see power/wakeup-source.txt
    type: boolean

  mediatek,syscon-wakeup:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    maxItems: 1
    description:
      A phandle to syscon used to access the register of the USB wakeup glue
      layer between xHCI and SPM, the field should always be 3 cells long.
    items:
      items:
        - description:
            The first cell represents a phandle to syscon
        - description:
            The second cell represents the register base address of the glue
            layer in syscon
        - description: |
            The third cell represents the hardware version of the glue layer,
            1 - used by mt8173 etc, revision 1 without following IPM rule;
            2 - used by mt2712 etc, revision 2 with following IPM rule;
            101 - used by mt8183, specific 1.01;
            102 - used by mt8192, specific 1.02;            
          enum: [1, 2, 101, 102]

  mediatek,u3p-dis-msk:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: The mask to disable u3ports, bit0 for u3port0,
      bit1 for u3port1, ... etc

  mediatek,u2p-dis-msk:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: The mask to disable u2ports, bit0 for u2port0,
      bit1 for u2port1, ... etc; but can't disable u2port0 if dual role mode
      is enabled, so will be skipped in this case.

# Required child node when support dual-role
patternProperties:
  "^usb@[0-9a-f]+$":
    type: object
    $ref: /schemas/usb/mediatek,mtk-xhci.yaml#
    description:
      The xhci should be added as subnode to mtu3 as shown in the following
      example if the host mode is enabled.

dependencies:
  connector: [ 'usb-role-switch' ]
  port: [ 'usb-role-switch' ]
  role-switch-default-mode: [ 'usb-role-switch' ]
  wakeup-source: [ 'mediatek,syscon-wakeup' ]

required:
  - compatible
  - reg
  - reg-names
  - interrupts
  - clocks
  - clock-names

additionalProperties: false

examples:
  # Dual role switch by extcon
  - |
    #include <dt-bindings/clock/mt8173-clk.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>
    #include <dt-bindings/phy/phy.h>
    #include <dt-bindings/power/mt8173-power.h>

    usb@11271000 {
        compatible = "mediatek,mt8173-mtu3", "mediatek,mtu3";
        reg = <0x11271000 0x3000>, <0x11280700 0x0100>;
        reg-names = "mac", "ippc";
        interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_LOW>;
        phys = <&phy_port0 PHY_TYPE_USB3>, <&phy_port1 PHY_TYPE_USB2>;
        power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
        clocks = <&topckgen CLK_TOP_USB30_SEL>;
        clock-names = "sys_ck";
        vusb33-supply = <&mt6397_vusb_reg>;
        vbus-supply = <&usb_p0_vbus>;
        extcon = <&extcon_usb>;
        dr_mode = "otg";
        wakeup-source;
        mediatek,syscon-wakeup = <&pericfg 0x400 1>;
        #address-cells = <1>;
        #size-cells = <1>;
        ranges;

        xhci: usb@11270000 {
            compatible = "mediatek,mt8173-xhci", "mediatek,mtk-xhci";
            reg = <0x11270000 0x1000>;
            reg-names = "mac";
            interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
            power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
            clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>;
            clock-names = "sys_ck", "ref_ck";
            vusb33-supply = <&mt6397_vusb_reg>;
        };
    };    

  # Dual role switch by gpio-usb-b-connector
  - |
    #include <dt-bindings/gpio/gpio.h>
    #include <dt-bindings/power/mt2712-power.h>

    usb@112c1000 {
        compatible = "mediatek,mt2712-mtu3", "mediatek,mtu3";
        reg = <0x112c1000 0x3000>, <0x112d0700 0x0100>;
        reg-names = "mac", "ippc";
        interrupts = <GIC_SPI 248 IRQ_TYPE_LEVEL_LOW>;
        phys = <&u2port2 PHY_TYPE_USB2>;
        power-domains = <&scpsys MT2712_POWER_DOMAIN_USB2>;
        clocks = <&topckgen CLK_TOP_USB30_SEL>;
        clock-names = "sys_ck";
        dr_mode = "otg";
        usb-role-switch;
        #address-cells = <1>;
        #size-cells = <1>;
        ranges;

        host0: usb@11270000 {
            compatible = "mediatek,mt2712-xhci", "mediatek,mtk-xhci";
            reg = <0x11270000 0x1000>;
            reg-names = "mac";
            interrupts = <GIC_SPI 123 IRQ_TYPE_LEVEL_LOW>;
            power-domains = <&scpsys MT2712_POWER_DOMAIN_USB>;
            clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>;
            clock-names = "sys_ck", "ref_ck";
        };

        connector {
            compatible = "gpio-usb-b-connector", "usb-b-connector";
            type = "micro";
            id-gpios = <&pio 12 GPIO_ACTIVE_HIGH>;
            vbus-supply = <&usb_p0_vbus>;
        };
    };    

  # Dual role switch with type-c
  - |
    usb@11201000 {
        compatible ="mediatek,mt8183-mtu3", "mediatek,mtu3";
        reg = <0x11201000 0x2e00>, <0x11203e00 0x0100>;
        reg-names = "mac", "ippc";
        interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_LOW>;
        phys = <&u2port0 PHY_TYPE_USB2>;
        clocks = <&clk26m>;
        clock-names = "sys_ck";
        mediatek,syscon-wakeup = <&pericfg 0x400 1>;
        wakeup-source;
        dr_mode = "otg";
        usb-role-switch;
        role-switch-default-mode = "host";
        #address-cells = <1>;
        #size-cells = <1>;
        ranges;

        host: usb@11200000 {
            compatible = "mediatek,mt8183-xhci", "mediatek,mtk-xhci";
            reg = <0x11200000 0x1000>;
            reg-names = "mac";
            interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_LOW>;
            clocks = <&clk26m>;
            clock-names = "sys_ck";
        };

        port {
            usb_role_sw: endpoint {
                remote-endpoint = <&hs_ep>;
            };
        };
    };    

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