121 lines
4.4 KiB
Plaintext
Executable file
121 lines
4.4 KiB
Plaintext
Executable file
MT8173 xHCI
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The device node for Mediatek SOC USB3.0 host controller
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There are two scenarios: the first one only supports xHCI driver;
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the second one supports dual-role mode, and the host is based on xHCI
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driver. Take account of backward compatibility, we divide bindings
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into two parts.
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1st: only supports xHCI driver
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------------------------------------------------------------------------
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Required properties:
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- compatible : should be "mediatek,<soc-model>-xhci", "mediatek,mtk-xhci",
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soc-model is the name of SoC, such as mt8173, mt2712 etc, when using
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"mediatek,mtk-xhci" compatible string, you need SoC specific ones in
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addition, one of:
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- "mediatek,mt8173-xhci"
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- reg : specifies physical base address and size of the registers
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- reg-names: should be "mac" for xHCI MAC and "ippc" for IP port control
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- interrupts : interrupt used by the controller
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- power-domains : a phandle to USB power domain node to control USB's
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mtcmos
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- vusb33-supply : regulator of USB avdd3.3v
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- clocks : a list of phandle + clock-specifier pairs, one for each
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entry in clock-names
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- clock-names : must contain
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"sys_ck": controller clock used by normal mode,
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the following ones are optional:
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"ref_ck": reference clock used by low power mode etc,
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"mcu_ck": mcu_bus clock for register access,
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"dma_ck": dma_bus clock for data transfer by DMA
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- phys : see usb-hcd.txt in the current directory
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Optional properties:
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- wakeup-source : enable USB remote wakeup;
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- mediatek,syscon-wakeup : phandle to syscon used to access the register
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of the USB wakeup glue layer between xHCI and SPM; it depends on
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"wakeup-source", and has two arguments:
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- the first one : register base address of the glue layer in syscon;
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- the second one : hardware version of the glue layer
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- 1 : used by mt8173 etc
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- 2 : used by mt2712 etc
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- mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
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bit1 for u3port1, ... etc;
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- vbus-supply : reference to the VBUS regulator;
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- usb3-lpm-capable : supports USB3.0 LPM
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- pinctrl-names : a pinctrl state named "default" must be defined
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- pinctrl-0 : pin control group
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See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
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- imod-interval-ns: default interrupt moderation interval is 5000ns
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additionally the properties from usb-hcd.txt (in the current directory) are
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supported.
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Example:
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usb30: usb@11270000 {
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compatible = "mediatek,mt8173-xhci";
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reg = <0 0x11270000 0 0x1000>,
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<0 0x11280700 0 0x0100>;
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reg-names = "mac", "ippc";
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interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
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power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
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clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>,
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<&pericfg CLK_PERI_USB0>,
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<&pericfg CLK_PERI_USB1>;
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clock-names = "sys_ck", "ref_ck";
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phys = <&phy_port0 PHY_TYPE_USB3>,
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<&phy_port1 PHY_TYPE_USB2>;
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vusb33-supply = <&mt6397_vusb_reg>;
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vbus-supply = <&usb_p1_vbus>;
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usb3-lpm-capable;
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mediatek,syscon-wakeup = <&pericfg 0x400 1>;
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wakeup-source;
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imod-interval-ns = <10000>;
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};
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2nd: dual-role mode with xHCI driver
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------------------------------------------------------------------------
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In the case, xhci is added as subnode to mtu3. An example and the DT binding
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details of mtu3 can be found in:
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Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
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Required properties:
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- compatible : should be "mediatek,<soc-model>-xhci", "mediatek,mtk-xhci",
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soc-model is the name of SoC, such as mt8173, mt2712 etc, when using
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"mediatek,mtk-xhci" compatible string, you need SoC specific ones in
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addition, one of:
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- "mediatek,mt8173-xhci"
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- reg : specifies physical base address and size of the registers
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- reg-names: should be "mac" for xHCI MAC
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- interrupts : interrupt used by the host controller
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- power-domains : a phandle to USB power domain node to control USB's
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mtcmos
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- vusb33-supply : regulator of USB avdd3.3v
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- clocks : a list of phandle + clock-specifier pairs, one for each
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entry in clock-names
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- clock-names : must contain "sys_ck", and the following ones are optional:
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"ref_ck", "mcu_ck" and "dma_ck"
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Optional properties:
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- vbus-supply : reference to the VBUS regulator;
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- usb3-lpm-capable : supports USB3.0 LPM
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Example:
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usb30: usb@11270000 {
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compatible = "mediatek,mt8173-xhci";
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reg = <0 0x11270000 0 0x1000>;
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reg-names = "mac";
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interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
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power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
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clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>;
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clock-names = "sys_ck", "ref_ck";
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vusb33-supply = <&mt6397_vusb_reg>;
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usb3-lpm-capable;
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};
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