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Each lane is controlled by a HW block referred to as a "pad" in the Tegra hardware documentation. Each such "pad" may control either one or multiple lanes, and thus contains any logic common to all its lanes. Each lane can be separately configured and powered up. Some of the lanes are high-speed lanes, which can be used for PCIe, SATA or super-speed USB. Other lanes are for various types of low-speed, full-speed or high-speed USB (such as UTMI, ULPI and HSIC). The XUSB pad controller contains a software-configurable mux that sits between the I/O controller ports (e.g. PCIe) and the lanes. In addition to per-lane configuration, USB 3.0 ports may require additional settings on a per-board basis. Pads will be represented as children of the top-level XUSB pad controller device tree node. Each lane exposed by the pad will be represented by its own subnode and can be referenced by users of the lane using the standard PHY bindings, as described by the phy-bindings.txt file in this directory. The Tegra hardware documentation refers to the connection between the XUSB pad controller and the XUSB controller as "ports". This is confusing since "port" is typically used to denote the physical USB receptacle. The device tree binding in this document uses the term "port" to refer to the logical abstraction of the signals that are routed to a USB receptacle (i.e. a PHY for the USB signal, the VBUS power supply, the USB 2.0 companion port for USB 3.0 receptacles, ...). properties: compatible: oneOf: - enum: - nvidia,tegra124-xusb-padctl - items: - const: nvidia,tegra132-xusb-padctl - const: nvidia,tegra124-xusb-padctl reg: maxItems: 1 interrupts: items: - description: XUSB pad controller interrupt resets: items: - description: pad controller reset reset-names: items: - const: padctl avdd-pll-utmip-supply: description: UTMI PLL power supply. Must supply 1.8 V. avdd-pll-erefe-supply: description: PLLE reference PLL power supply. Must supply 1.05 V. avdd-pex-pll-supply: description: PCIe/USB3 PLL power supply. Must supply 1.05 V. hvdd-pex-pll-e-supply: description: High-voltage PLLE power supply. Must supply 3.3 V. pads: description: A required child node named "pads" contains a list of subnodes, one for each of the pads exposed by the XUSB pad controller. Each pad may need additional resources that can be referenced in its pad node. The "status" property is used to enable or disable the use of a pad. If set to "disabled", the pad will not be used on the given board. In order to use the pad and any of its lanes, this property must be set to "okay" or be absent. type: object additionalProperties: false properties: usb2: type: object additionalProperties: false properties: clocks: items: - description: USB2 tracking clock clock-names: items: - const: trk lanes: type: object additionalProperties: false properties: usb2-0: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ snps, xusb, uart ] usb2-1: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ snps, xusb, uart ] usb2-2: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ snps, xusb, uart ] ulpi: type: object additionalProperties: false properties: lanes: type: object additionalProperties: false properties: ulpi-0: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ snps, xusb ] hsic: type: object additionalProperties: false properties: clocks: items: - description: HSIC tracking clock clock-names: items: - const: trk lanes: type: object additionalProperties: false properties: hsic-0: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ snps, xusb ] hsic-1: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ snps, xusb ] pcie: type: object additionalProperties: false properties: clocks: items: - description: PLLE clock clock-names: items: - const: pll resets: items: - description: reset for the PCIe UPHY block reset-names: items: - const: phy lanes: type: object additionalProperties: false properties: pcie-0: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ pcie, usb3-ss ] pcie-1: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ pcie, usb3-ss ] pcie-2: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ pcie, usb3-ss ] pcie-3: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ pcie, usb3-ss ] pcie-4: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ pcie, usb3-ss ] sata: type: object additionalProperties: false properties: resets: items: - description: reset for the SATA UPHY block reset-names: items: - const: phy lanes: type: object additionalProperties: false properties: sata-0: type: object additionalProperties: false properties: "#phy-cells": const: 0 nvidia,function: description: Function selection for this lane. $ref: /schemas/types.yaml#/definitions/string enum: [ sata, usb3-ss ] ports: description: A required child node named "ports" contains a list of subnodes, one for each of the ports exposed by the XUSB pad controller. Each port may need additional resources that can be referenced in its port node. The "status" property is used to enable or disable the use of a port. If set to "disabled", the port will not be used on the given board. In order to use the port, this property must be set to "okay". type: object additionalProperties: false properties: usb2-0: type: object additionalProperties: false properties: # no need to further describe this because the connector will # match on gpio-usb-b-connector or usb-b-connector and cause # that binding to be selected for the subnode connector: type: object mode: description: A string that determines the mode in which to run the port. $ref: /schemas/types.yaml#/definitions/string enum: [ host, peripheral, otg ] nvidia,internal: description: A boolean property whose presence determines that a port is internal. In the absence of this property the port is considered to be external. $ref: /schemas/types.yaml#/definitions/flag usb-role-switch: description: | A boolean property whole presence indicates that the port supports OTG or peripheral mode. If present, the port supports switching between USB host and peripheral roles. A connector must be added as a subnode in that case. See ../connector/usb-connector.yaml. vbus-supply: description: A phandle to the regulator supplying the VBUS voltage. usb2-1: type: object additionalProperties: false properties: # no need to further describe this because the connector will # match on gpio-usb-b-connector or usb-b-connector and cause # that binding to be selected for the subnode connector: type: object mode: description: A string that determines the mode in which to run the port. $ref: /schemas/types.yaml#/definitions/string enum: [ host, peripheral, otg ] nvidia,internal: description: A boolean property whose presence determines that a port is internal. In the absence of this property the port is considered to be external. $ref: /schemas/types.yaml#/definitions/flag usb-role-switch: description: | A boolean property whole presence indicates that the port supports OTG or peripheral mode. If present, the port supports switching between USB host and peripheral roles. A connector must be added as a subnode in that case. See ../connector/usb-connector.yaml. vbus-supply: description: A phandle to the regulator supplying the VBUS voltage. usb2-2: type: object additionalProperties: false properties: # no need to further describe this because the connector will # match on gpio-usb-b-connector or usb-b-connector and cause # that binding to be selected for the subnode connector: type: object mode: description: A string that determines the mode in which to run the port. $ref: /schemas/types.yaml#/definitions/string enum: [ host, peripheral, otg ] nvidia,internal: description: A boolean property whose presence determines that a port is internal. In the absence of this property the port is considered to be external. $ref: /schemas/types.yaml#/definitions/flag usb-role-switch: description: | A boolean property whole presence indicates that the port supports OTG or peripheral mode. If present, the port supports switching between USB host and peripheral roles. A connector must be added as a subnode in that case. See ../connector/usb-connector.yaml. vbus-supply: description: A phandle to the regulator supplying the VBUS voltage. ulpi-0: type: object additionalProperties: false properties: nvidia,internal: description: A boolean property whose presence determines that a port is internal. In the absence of this property the port is considered to be external. $ref: /schemas/types.yaml#/definitions/flag vbus-supply: description: A phandle to the regulator supplying the VBUS voltage. hsic-0: type: object additionalProperties: false properties: vbus-supply: description: A phandle to the regulator supplying the VBUS voltage. hsic-1: type: object additionalProperties: false properties: vbus-supply: description: A phandle to the regulator supplying the VBUS voltage. usb3-0: type: object additionalProperties: false properties: nvidia,internal: description: A boolean property whose presence determines that a port is internal. In the absence of this property the port is considered to be external. $ref: /schemas/types.yaml#/definitions/flag nvidia,usb2-companion: description: A single cell that specifies the physical port number to map this super-speed USB port to. The range of valid port numbers varies with the SoC generation. $ref: /schemas/types.yaml#/definitions/uint32 enum: [ 0, 1, 2 ] vbus-supply: description: A phandle to the regulator supplying the VBUS voltage. usb3-1: type: object additionalProperties: false properties: nvidia,internal: description: A boolean property whose presence determines that a port is internal. In the absence of this property the port is considered to be external. $ref: /schemas/types.yaml#/definitions/flag nvidia,usb2-companion: description: A single cell that specifies the physical port number to map this super-speed USB port to. The range of valid port numbers varies with the SoC generation. $ref: /schemas/types.yaml#/definitions/uint32 enum: [ 0, 1, 2 ] vbus-supply: description: A phandle to the regulator supplying the VBUS voltage. additionalProperties: false required: - compatible - reg - resets - reset-names - avdd-pll-utmip-supply - avdd-pll-erefe-supply - avdd-pex-pll-supply - hvdd-pex-pll-e-supply examples: # Tegra124 and Tegra132 - | #include <dt-bindings/interrupt-controller/arm-gic.h> padctl@7009f000 { compatible = "nvidia,tegra124-xusb-padctl"; reg = <0x7009f000 0x1000>; interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>; resets = <&tegra_car 142>; reset-names = "padctl"; avdd-pll-utmip-supply = <&vddio_1v8>; avdd-pll-erefe-supply = <&avdd_1v05_run>; avdd-pex-pll-supply = <&vdd_1v05_run>; hvdd-pex-pll-e-supply = <&vdd_3v3_lp0>; pads { usb2 { lanes { usb2-0 { nvidia,function = "xusb"; #phy-cells = <0>; }; usb2-1 { nvidia,function = "xusb"; #phy-cells = <0>; }; usb2-2 { nvidia,function = "xusb"; #phy-cells = <0>; }; }; }; ulpi { lanes { ulpi-0 { status = "disabled"; #phy-cells = <0>; }; }; }; hsic { lanes { hsic-0 { status = "disabled"; #phy-cells = <0>; }; hsic-1 { status = "disabled"; #phy-cells = <0>; }; }; }; pcie { lanes { pcie-0 { nvidia,function = "usb3-ss"; #phy-cells = <0>; }; pcie-1 { status = "disabled"; #phy-cells = <0>; }; pcie-2 { nvidia,function = "pcie"; #phy-cells = <0>; }; pcie-3 { status = "disabled"; #phy-cells = <0>; }; pcie-4 { nvidia,function = "pcie"; #phy-cells = <0>; }; }; }; sata { lanes { sata-0 { nvidia,function = "sata"; #phy-cells = <0>; }; }; }; }; ports { /* Micro A/B */ usb2-0 { mode = "otg"; }; /* Mini PCIe */ usb2-1 { mode = "host"; }; /* USB3 */ usb2-2 { vbus-supply = <&vdd_usb3_vbus>; mode = "host"; }; ulpi-0 { status = "disabled"; }; hsic-0 { status = "disabled"; }; hsic-1 { status = "disabled"; }; usb3-0 { nvidia,usb2-companion = <2>; }; usb3-1 { status = "disabled"; }; }; }; |