[PATCH 2/2] riscv: dts: spacemit: add usb3.0 support for K1

[Ze Huang]

Add USB 3.0 support for the SpacemiT K1 SoC, including the
following components:

- USB 2.0 PHY nodes
- USB 3.0 combo PHY node
- USB 3.0 host controller
- USB 3.0 hub and vbus regulator (usb3_vhub, usb3_vbus)
- DRAM interconnect node for USB DMA ("dma-mem")

The `usb3_vbus` and `usb3_vhub` regulator node provides a fixed 5V
supply to power the onboard USB 3.0 hub and usb vbus.

On K1, some DMA transfers from devices to memory use separate buses with
different DMA address translation rules from the parent node. We express
this relationship through the interconnects node("dma-mem").

Signed-off-by: Ze Huang <huangze at whut.edu.cn>
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 52 +++++++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k1.dtsi            | 56 +++++++++++++++++++++++++
 2 files changed, 108 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index 816ef1bc358ec490aff184d5915d680dbd9f00cb..0c0bf572d31e056955eb2ff377c3262271dcc156 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -28,6 +28,25 @@ led1 {
 			default-state = "on";
 		};
 	};
+
+	usb3_vhub: regulator-vhub-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "USB30_VHUB";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio K1_GPIO(123) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	usb3_vbus: regulator-vbus-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "USB30_VBUS";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		gpio = <&gpio K1_GPIO(97) GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
 };
 
 &uart0 {
@@ -35,3 +54,36 @@ &uart0 {
 	pinctrl-0 = <&uart0_2_cfg>;
 	status = "okay";
 };
+
+&usbphy2 {
+	status = "okay";
+};
+
+&combphy {
+	status = "okay";
+};
+
+&usb_dwc3 {
+	dr_mode = "host";
+	phy_type = "utmi";
+	snps,hsphy_interface = "utmi";
+	snps,dis_enblslpm_quirk;
+	snps,dis-u1u2-quirk;
+	snps,dis-u2-freeclk-exists-quirk;
+	snps,dis-del-phy-power-chg-quirk;
+	snps,dis_u2_susphy_quirk;
+	snps,dis_u3_susphy_quirk;
+	snps,dis_rxdet_inp3_quirk;
+	snps,xhci-trb-ent-quirk;
+	vbus-supply = <&usb3_vbus>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	hub at 1 {
+		compatible = "usb2109,817";
+		reg = <0x1>;
+		vdd-supply = <&usb3_vhub>;
+		reset-gpios = <&gpio K1_GPIO(124) GPIO_ACTIVE_LOW>;
+	};
+};
diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index c0cc4b99c9356d550a470291dba9f2625b10f8df..c7b86c850da969e5412ad42c63995cd20b4d0484 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -4,6 +4,8 @@
  */
 
 #include <dt-bindings/clock/spacemit,k1-syscon.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/phy/phy.h>
 
 /dts-v1/;
 / {
@@ -346,6 +348,13 @@ soc {
 		dma-noncoherent;
 		ranges;
 
+		dram_range0: dram-range at 0 {
+			#address-cells = <2>;
+			#size-cells = <2>;
+			dma-ranges = <0x0 0x00000000 0x0 0x00000000 0x0 0x80000000>;
+			#interconnect-cells = <0>;
+		};
+
 		syscon_rcpu: system-controller at c0880000 {
 			compatible = "spacemit,k1-syscon-rcpu";
 			reg = <0x0 0xc0880000 0x0 0x2048>;
@@ -358,6 +367,53 @@ syscon_rcpu2: system-controller at c0888000 {
 			#reset-cells = <1>;
 		};
 
+		usb_dwc3: usb at c0a00000 {
+			compatible = "spacemit,k1-dwc3", "snps,dwc3";
+			reg = <0x0 0xc0a00000 0x0 0x10000>;
+			clocks = <&syscon_apmu CLK_USB30>;
+			clock-names = "bus_early";
+			resets = <&syscon_apmu RESET_USB3_0>;
+			interrupt-parent = <&plic>;
+			interrupts = <125>;
+			interconnects = <&dram_range0>;
+			interconnect-names = "dma-mem";
+			phys = <&usbphy2>, <&combphy PHY_TYPE_USB3>;
+			phy-names = "usb2-phy", "usb3-phy";
+			status = "disabled";
+		};
+
+		usbphy0: phy at c0940000 {
+			compatible = "spacemit,usb2-phy";
+			reg = <0x0 0xc0940000 0x0 0x200>;
+			clocks = <&syscon_apmu CLK_USB_AXI>;
+			status = "disabled";
+		};
+
+		usbphy1: phy at c09c0000 {
+			compatible = "spacemit,usb2-phy";
+			reg = <0x0 0xc09c0000 0x0 0x200>;
+			clocks = <&syscon_apmu CLK_USB_P1>;
+			status = "disabled";
+		};
+
+		usbphy2: phy at 0xc0a30000 {
+			compatible = "spacemit,k1-usb2-phy";
+			reg = <0x0 0xc0a30000 0x0 0x200>;
+			clocks = <&syscon_apmu CLK_USB30>;
+			#phy-cells = <0>;
+			status = "disabled";
+		};
+
+		combphy: phy at c0b10000 {
+			compatible = "spacemit,k1-combphy";
+			reg = <0x0 0xc0b10000 0x0 0x800>,
+			      <0x0 0xd4282910 0x0 0x400>;
+			reg-names = "ctrl", "sel";
+			resets = <&syscon_apmu RESET_PCIE0>;
+			#phy-cells = <1>;
+			status = "disabled";
+		};
+
 		syscon_apbc: system-control at d4015000 {
 			compatible = "spacemit,k1-syscon-apbc";
 			reg = <0x0 0xd4015000 0x0 0x1000>;

-- 
2.49.0