[PW_SID:971617] Add Ethernet MAC support for SpacemiT K1

Documentation/devicetree/bindings/net/spacemit,k1-emac.yaml

@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/spacemit,k1-emac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SpacemiT K1 Ethernet MAC
+
+allOf:
+  - $ref: ethernet-controller.yaml#
+
+maintainers:
+  - Vivian Wang <wangruikang@iscas.ac.cn>
+
+properties:
+  compatible:
+    const: spacemit,k1-emac
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  mdio-bus:
+    $ref: mdio.yaml#
+    unevaluatedProperties: false
+
+  resets:
+    maxItems: 1
+
+  spacemit,apmu:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: phandle to syscon that controls this MAC
+          - description: offset of control registers
+    description:
+      A phandle to syscon with byte offset to control registers for this MAC
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+  - resets
+  - spacemit,apmu
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/spacemit,k1-syscon.h>
+
+    ethernet@cac80000 {
+        compatible = "spacemit,k1-emac";
+        reg = <0xcac80000 0x00000420>;
+        clocks = <&syscon_apmu CLK_EMAC0_BUS>;
+        interrupts = <131>;
+        mac-address = [ 00 00 00 00 00 00 ];
+        phy-handle = <&rgmii0>;
+        phy-mode = "rgmii-id";
+        pinctrl-names = "default";
+        pinctrl-0 = <&gmac0_cfg>;
+        resets = <&syscon_apmu RESET_EMAC0>;
+        rx-internal-delay-ps = <0>;
+        tx-internal-delay-ps = <0>;
+        spacemit,apmu = <&syscon_apmu 0x3e4>;
+
+        mdio-bus {
+            #address-cells = <0x1>;
+            #size-cells = <0x0>;
+
+            rgmii0: phy@1 {
+                reg = <0x1>;
+            };
+        };
+    };

arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts

@@ -35,3 +35,49 @@
 	pinctrl-0 = <&uart0_2_cfg>;
 	status = "okay";
 };
+
+&eth0 {
+	phy-handle = <&rgmii0>;
+	phy-mode = "rgmii-id";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac0_cfg>;
+	rx-internal-delay-ps = <0>;
+	tx-internal-delay-ps = <0>;
+	status = "okay";
+
+	mdio-bus {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+
+		reset-gpios = <&gpio K1_GPIO(110) GPIO_ACTIVE_LOW>;
+		reset-delay-us = <10000>;
+		reset-post-delay-us = <100000>;
+
+		rgmii0: phy@1 {
+			reg = <0x1>;
+		};
+	};
+};
+
+&eth1 {
+	phy-handle = <&rgmii1>;
+	phy-mode = "rgmii-id";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac1_cfg>;
+	rx-internal-delay-ps = <0>;
+	tx-internal-delay-ps = <250>;
+	status = "okay";
+
+	mdio-bus {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+
+		reset-gpios = <&gpio K1_GPIO(115) GPIO_ACTIVE_LOW>;
+		reset-delay-us = <10000>;
+		reset-post-delay-us = <100000>;
+
+		rgmii1: phy@1 {
+			reg = <0x1>;
+		};
+	};
+};

arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi

@@ -20,4 +20,52 @@
 			drive-strength = <32>;
 		};
 	};
+
+	gmac0_cfg: gmac0-cfg {
+		gmac0-pins {
+			pinmux = <K1_PADCONF(0, 1)>,	/* gmac0_rxdv */
+				 <K1_PADCONF(1, 1)>,	/* gmac0_rx_d0 */
+				 <K1_PADCONF(2, 1)>,	/* gmac0_rx_d1 */
+				 <K1_PADCONF(3, 1)>,	/* gmac0_rx_clk */
+				 <K1_PADCONF(4, 1)>,	/* gmac0_rx_d2 */
+				 <K1_PADCONF(5, 1)>,	/* gmac0_rx_d3 */
+				 <K1_PADCONF(6, 1)>,	/* gmac0_tx_d0 */
+				 <K1_PADCONF(7, 1)>,	/* gmac0_tx_d1 */
+				 <K1_PADCONF(8, 1)>,	/* gmac0_tx */
+				 <K1_PADCONF(9, 1)>,	/* gmac0_tx_d2 */
+				 <K1_PADCONF(10, 1)>,	/* gmac0_tx_d3 */
+				 <K1_PADCONF(11, 1)>,	/* gmac0_tx_en */
+				 <K1_PADCONF(12, 1)>,	/* gmac0_mdc */
+				 <K1_PADCONF(13, 1)>,	/* gmac0_mdio */
+				 <K1_PADCONF(14, 1)>,	/* gmac0_int_n */
+				 <K1_PADCONF(45, 1)>;	/* gmac0_clk_ref */
+
+			bias-pull-up = <0>;
+			drive-strength = <21>;
+		};
+	};
+
+	gmac1_cfg: gmac1-cfg {
+		gmac1-pins {
+			pinmux = <K1_PADCONF(29, 1)>,	/* gmac1_rxdv */
+				 <K1_PADCONF(30, 1)>,	/* gmac1_rx_d0 */
+				 <K1_PADCONF(31, 1)>,	/* gmac1_rx_d1 */
+				 <K1_PADCONF(32, 1)>,	/* gmac1_rx_clk */
+				 <K1_PADCONF(33, 1)>,	/* gmac1_rx_d2 */
+				 <K1_PADCONF(34, 1)>,	/* gmac1_rx_d3 */
+				 <K1_PADCONF(35, 1)>,	/* gmac1_tx_d0 */
+				 <K1_PADCONF(36, 1)>,	/* gmac1_tx_d1 */
+				 <K1_PADCONF(37, 1)>,	/* gmac1_tx */
+				 <K1_PADCONF(38, 1)>,	/* gmac1_tx_d2 */
+				 <K1_PADCONF(39, 1)>,	/* gmac1_tx_d3 */
+				 <K1_PADCONF(40, 1)>,	/* gmac1_tx_en */
+				 <K1_PADCONF(41, 1)>,	/* gmac1_mdc */
+				 <K1_PADCONF(42, 1)>,	/* gmac1_mdio */
+				 <K1_PADCONF(43, 1)>,	/* gmac1_int_n */
+				 <K1_PADCONF(46, 1)>;	/* gmac1_clk_ref */
+
+			bias-pull-up = <0>;
+			drive-strength = <21>;
+		};
+	};
 };

arch/riscv/boot/dts/spacemit/k1.dtsi

@@ -562,5 +562,27 @@
 			reg-io-width = <4>;
 			status = "reserved"; /* for TEE usage */
 		};
+
+		eth0: ethernet@cac80000 {
+			compatible = "spacemit,k1-emac";
+			reg = <0x0 0xcac80000 0x0 0x420>;
+			clocks = <&syscon_apmu CLK_EMAC0_BUS>;
+			interrupts = <131>;
+			mac-address = [ 00 00 00 00 00 00 ];
+			resets = <&syscon_apmu RESET_EMAC0>;
+			spacemit,apmu = <&syscon_apmu 0x3e4>;
+			status = "disabled";
+		};
+
+		eth1: ethernet@cac81000 {
+			compatible = "spacemit,k1-emac";
+			reg = <0x0 0xcac81000 0x0 0x420>;
+			clocks = <&syscon_apmu CLK_EMAC1_BUS>;
+			interrupts = <133>;
+			mac-address = [ 00 00 00 00 00 00 ];
+			resets = <&syscon_apmu RESET_EMAC1>;
+			spacemit,apmu = <&syscon_apmu 0x3ec>;
+			status = "disabled";
+		};
 	};
 };

drivers/net/ethernet/Kconfig

@@ -188,6 +188,7 @@ source "drivers/net/ethernet/sis/Kconfig"
 source "drivers/net/ethernet/sfc/Kconfig"
 source "drivers/net/ethernet/smsc/Kconfig"
 source "drivers/net/ethernet/socionext/Kconfig"
+source "drivers/net/ethernet/spacemit/Kconfig"
 source "drivers/net/ethernet/stmicro/Kconfig"
 source "drivers/net/ethernet/sun/Kconfig"
 source "drivers/net/ethernet/sunplus/Kconfig"

drivers/net/ethernet/Makefile

@@ -91,6 +91,7 @@ obj-$(CONFIG_NET_VENDOR_SOLARFLARE) += sfc/
 obj-$(CONFIG_NET_VENDOR_SGI) += sgi/
 obj-$(CONFIG_NET_VENDOR_SMSC) += smsc/
 obj-$(CONFIG_NET_VENDOR_SOCIONEXT) += socionext/
+obj-$(CONFIG_NET_VENDOR_SPACEMIT) += spacemit/
 obj-$(CONFIG_NET_VENDOR_STMICRO) += stmicro/
 obj-$(CONFIG_NET_VENDOR_SUN) += sun/
 obj-$(CONFIG_NET_VENDOR_SUNPLUS) += sunplus/

drivers/net/ethernet/spacemit/Kconfig

@@ -0,0 +1,29 @@
+config NET_VENDOR_SPACEMIT
+	bool "SpacemiT devices"
+	default y
+	depends on ARCH_SPACEMIT || COMPILE_TEST
+	help
+	  If you have a network (Ethernet) device belonging to this class,
+	  say Y.
+
+	  Note that the answer to this question does not directly affect
+	  the kernel: saying N will just cause the configurator to skip all
+	  the questions regarding SpacemiT devices. If you say Y, you will
+	  be asked for your specific chipset/driver in the following questions.
+
+if NET_VENDOR_SPACEMIT
+
+config SPACEMIT_K1_EMAC
+	tristate "SpacemiT K1 Ethernet MAC driver"
+	depends on ARCH_SPACEMIT || COMPILE_TEST
+	depends on MFD_SYSCON
+	depends on OF
+	default m if ARCH_SPACEMIT
+	select PHYLIB
+	help
+	  This driver supports the Ethernet MAC in the SpacemiT K1 SoC.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called k1_emac.
+
+endif # NET_VENDOR_SPACEMIT

drivers/net/ethernet/spacemit/Makefile

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the SpacemiT network device drivers.
+#
+
+obj-$(CONFIG_SPACEMIT_K1_EMAC) += k1_emac.o