RK3568 学习笔记 : u-boot 千兆网络无法 ping 通PC问题的解决方法二

发布于：2024-05-09 ⋅ 阅读:(26) ⋅ 点赞:(0)

参考

前言

  • rk3568 rockchip 提供的 u-boot，默认的设备树需要读取 单独分区 resouce.img 镜像中的 设备树文件，也就是 Linux 内核的设备树 dtb 文件，gmac 网络才能正常的 ping 通 PC 主机。

  • 如果使用 u-boot 默认的设备树，虽然可以正常的识别到 gmac 设备，但是无法 ping 通 PC 主机，也就是 u-boot 下网络功能异常。

环境

  • 正点原子 RK3568 开发板： AtomPi-CA1 与 DLRK3568 开发板

  • 虚拟机 ubuntu 20.04 单独编译 开发板提供的 u-boot，并去掉 rockchip 一些定制的选项，如使用 resouce 分区等

相关的修改

  • 取消【勾选】一些 rockchip 的配置选项

在这里插入图片描述
在这里插入图片描述

[ ] Enable support for rockchip resource image 
[ ] Rockchip vendor storage partition support
[ ] Using dtb from Kernel/resource for U-Boot

  • 取消后，重新编译 u-boot，发现启动后，提示 env emmc 异常，此时需要修改一下 common/board_r.c 文件

  • rockchip 为了实现 env 通过读取 resource 分区，对初始化次序做了一些调整，需要调整回去，也就是 env 的初始化需要默认放在 mmc 初始化的后面

在这里插入图片描述

  • 这里主要是关闭了 CONFIG_USING_KERNEL_DTB，造成了 initr_env 初始化放在了 initr_mmc 前面，改到后面，就可以正常的 初始化 env 了（env 保存在 emmc 中）

设备树问题

  • 如果使用 u-boot 默认的设备树，gmac 网络无法 ping 通，如果把 u-boot 下的整个设备树，替换为 rockchip Linux kernel 中的设备树，gmac 网络可以正常 ping 通，说明问题点在 设备树的配置上。

  • u-boot 下的设备树，如果全部替换为 Linux kernel 的设备树，比较的麻烦，需要替换很多文件，包括 dt-bindings 头文件等，因为 u-boot 下的设备树与 Linux kernel 的设备树属于两套独立的设备树。Linux kernel 的设备树相对齐全与复杂一些。

  • 通过对比 u-boot 与 Linux kernel 的 设备树，发现 gmac 的相关的设置均一致，排除了 gmac 设置问题。

  • 那到底什么会影响 gmac 的网络功能呢？ gmac 网络设备能正常的初始化，没有报错。

问题排查

  • 通过查看 开发板的原理图，发现了一些思路，电源管理，也就是 Linux 内核的设备树，与 rk809 pmic 的电源管理配置，而 u-boot 下，并没有这个配置。

  • 经过仔细查看原理图，发现 gmac 的 io 供电 vcc_1v8，来自 rk809 pmic 电源管理芯片，而这个 pmic 电源管理芯片，默认需要使用 i2c 通信配置，如果不配置，默认的配置，可能供电异常。

在这里插入图片描述

在这里插入图片描述

  • 抱着尝试的心态，在 u-boot 下的开发板设备树文件中，增加 rk809 相关的配置（来自 Linux kernel 设备树配置），并使能了 电源域，测试发现，网络可以 Ping 通了，说明网络 u-boot 默认设备树缺少 pmic 电源管理部分，造成网络无法正常 ping 通

  • 增加的电源管理部分 rk809 相关的设备树配置如下：DLRK3568 开发板 arch/arm/dts/atk-dlrk3568.dts 文件

/*
 * SPDX-License-Identifier:     GPL-2.0+
 *
 * (C) Copyright 2020 Rockchip Electronics Co., Ltd
 */

/dts-v1/;
#include "rk3568.dtsi"
#include "rk3568-u-boot.dtsi"
#include <dt-bindings/input/input.h>

/ {
	model = "ATK-DLRK3568 Rockchip RK3568 Board";
	compatible = "rockchip,rk3568-evb", "rockchip,rk3568";

	dc_12v: dc-12v {
		compatible = "regulator-fixed";
		regulator-name = "dc_12v";
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <12000000>;
		regulator-max-microvolt = <12000000>;
	};

	vcc3v3_sys: vcc3v3-sys {
		compatible = "regulator-fixed";
		regulator-name = "vcc3v3_sys";
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		vin-supply = <&dc_12v>;
	};

	vcc5v0_sys: vcc5v0-sys {
		compatible = "regulator-fixed";
		regulator-name = "vcc5v0_sys";
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <5000000>;
		regulator-max-microvolt = <5000000>;
		vin-supply = <&dc_12v>;
	};

	vcc5v0_usb: vcc5v0-usb {
		compatible = "regulator-fixed";
		regulator-name = "vcc5v0_usb";
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <5000000>;
		regulator-max-microvolt = <5000000>;
		vin-supply = <&dc_12v>;
	};

	adc-keys {
		compatible = "adc-keys";
		io-channels = <&saradc 0>;
		io-channel-names = "buttons";
		keyup-threshold-microvolt = <1800000>;
		u-boot,dm-spl;
		status = "okay";

		volumeup-key {
			u-boot,dm-spl;
			linux,code = <KEY_VOLUMEUP>;
			label = "volume up";
			press-threshold-microvolt = <17822>;
		};

		volumedown-key {
			u-boot,dm-spl;
			label = "volume down";
			linux,code = <KEY_VOLUMEDOWN>;
			press-threshold-microvolt = <415385>;
		};
	};
};

&mdio0 {
	rgmii_phy0: phy@0 {
		compatible = "ethernet-phy-ieee802.3-c22";
		reg = <0x0>;
	};
};

&mdio1 {
	rgmii_phy1: phy@0 {
		compatible = "ethernet-phy-ieee802.3-c22";
		reg = <0x0>;
	};
};

&gmac0 {
	phy-mode = "rgmii";
	clock_in_out = "output";

	snps,reset-gpio = <&gpio2 RK_PD3 GPIO_ACTIVE_LOW>;
	snps,reset-active-low;
	/* Reset time is 20ms, 100ms for rtl8211f */
	snps,reset-delays-us = <0 20000 100000>;
	assigned-clocks = <&cru SCLK_GMAC0_RX_TX>, <&cru SCLK_GMAC0>;
	assigned-clock-parents = <&cru SCLK_GMAC0_RGMII_SPEED>;
	assigned-clock-rates = <0>, <125000000>;

	pinctrl-names = "default";
	pinctrl-0 = <&gmac0_miim
		     &gmac0_tx_bus2
		     &gmac0_rx_bus2
		     &gmac0_rgmii_clk
		     &gmac0_rgmii_bus>;

	tx_delay = <0x3c>;
	rx_delay = <0x2f>;

	phy-handle = <&rgmii_phy0>;
	status = "okay";
};

&gmac1 {
	phy-mode = "rgmii";
	clock_in_out = "output";

	snps,reset-gpio = <&gpio2 RK_PD1 GPIO_ACTIVE_LOW>;
	snps,reset-active-low;
	/* Reset time is 20ms, 100ms for rtl8211f */
	snps,reset-delays-us = <0 20000 100000>;

	assigned-clocks = <&cru SCLK_GMAC1_RX_TX>, <&cru SCLK_GMAC1>;
	assigned-clock-parents = <&cru SCLK_GMAC1_RGMII_SPEED>;
	assigned-clock-rates = <0>, <125000000>;

	pinctrl-names = "default";
	pinctrl-0 = <&gmac1m1_miim
		     &gmac1m1_tx_bus2
		     &gmac1m1_rx_bus2
		     &gmac1m1_rgmii_clk
		     &gmac1m1_rgmii_bus>;

	tx_delay = <0x4f>;
	rx_delay = <0x26>;

	phy-handle = <&rgmii_phy1>;
	status = "okay";
};

&crypto {
	status = "okay";
};

&uart2 {
	status = "okay";
};

&i2c0 {
	status = "okay";

	vdd_cpu: tcs4525@1c {
		compatible = "tcs,tcs452x";
		reg = <0x1c>;
		vin-supply = <&vcc5v0_sys>;
		regulator-compatible = "fan53555-reg";
		regulator-name = "vdd_cpu";
		regulator-min-microvolt = <712500>;
		regulator-max-microvolt = <1390000>;
		regulator-init-microvolt = <900000>;
		regulator-ramp-delay = <2300>;
		fcs,suspend-voltage-selector = <1>;
		regulator-boot-on;
		regulator-always-on;
		regulator-state-mem {
			regulator-off-in-suspend;
		};
	};

	rk809: pmic@20 {
		compatible = "rockchip,rk809";
		reg = <0x20>;
		interrupt-parent = <&gpio0>;
		interrupts = <3 IRQ_TYPE_LEVEL_LOW>;

		pinctrl-names = "default", "pmic-sleep",
				"pmic-power-off", "pmic-reset";
		pinctrl-0 = <&pmic_int>;
		pinctrl-1 = <&soc_slppin_slp>, <&rk817_slppin_slp>;
		pinctrl-2 = <&soc_slppin_gpio>, <&rk817_slppin_pwrdn>;
		pinctrl-3 = <&soc_slppin_gpio>, <&rk817_slppin_rst>;

		rockchip,system-power-controller;
		wakeup-source;
		#clock-cells = <1>;
		clock-output-names = "rk808-clkout1", "rk808-clkout2";
		//fb-inner-reg-idxs = <2>;
		/* 1: rst regs (default in codes), 0: rst the pmic */
		pmic-reset-func = <0>;
		/* not save the PMIC_POWER_EN register in uboot */
		not-save-power-en = <1>;

		vcc1-supply = <&vcc3v3_sys>;
		vcc2-supply = <&vcc3v3_sys>;
		vcc3-supply = <&vcc3v3_sys>;
		vcc4-supply = <&vcc3v3_sys>;
		vcc5-supply = <&vcc3v3_sys>;
		vcc6-supply = <&vcc3v3_sys>;
		vcc7-supply = <&vcc3v3_sys>;
		vcc8-supply = <&vcc3v3_sys>;
		vcc9-supply = <&vcc3v3_sys>;

		pwrkey {
			status = "okay";
		};

		pinctrl_rk8xx: pinctrl_rk8xx {
			gpio-controller;
			#gpio-cells = <2>;

			rk817_slppin_null: rk817_slppin_null {
				pins = "gpio_slp";
				function = "pin_fun0";
			};

			rk817_slppin_slp: rk817_slppin_slp {
				pins = "gpio_slp";
				function = "pin_fun1";
			};

			rk817_slppin_pwrdn: rk817_slppin_pwrdn {
				pins = "gpio_slp";
				function = "pin_fun2";
			};

			rk817_slppin_rst: rk817_slppin_rst {
				pins = "gpio_slp";
				function = "pin_fun3";
			};
		};

		regulators {
			vdd_logic: DCDC_REG1 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <500000>;
				regulator-max-microvolt = <1350000>;
				regulator-init-microvolt = <900000>;
				regulator-ramp-delay = <6001>;
				regulator-initial-mode = <0x2>;
				regulator-name = "vdd_logic";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vdd_gpu: DCDC_REG2 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <500000>;
				regulator-max-microvolt = <1350000>;
				regulator-init-microvolt = <900000>;
				regulator-ramp-delay = <6001>;
				regulator-initial-mode = <0x2>;
				regulator-name = "vdd_gpu";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc_ddr: DCDC_REG3 {
				regulator-always-on;
				regulator-boot-on;
				regulator-initial-mode = <0x2>;
				regulator-name = "vcc_ddr";
				regulator-state-mem {
					regulator-on-in-suspend;
				};
			};

			vdd_npu: DCDC_REG4 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <500000>;
				regulator-max-microvolt = <1350000>;
				regulator-init-microvolt = <900000>;
				regulator-ramp-delay = <6001>;
				regulator-initial-mode = <0x2>;
				regulator-name = "vdd_npu";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vdda0v9_image: LDO_REG1 {
				regulator-boot-on;
				regulator-always-on;
				regulator-min-microvolt = <900000>;
				regulator-max-microvolt = <900000>;
				regulator-name = "vdda0v9_image";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vdda_0v9: LDO_REG2 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <900000>;
				regulator-max-microvolt = <900000>;
				regulator-name = "vdda_0v9";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vdda0v9_pmu: LDO_REG3 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <900000>;
				regulator-max-microvolt = <900000>;
				regulator-name = "vdda0v9_pmu";
				regulator-state-mem {
					regulator-on-in-suspend;
					regulator-suspend-microvolt = <900000>;
				};
			};

			vccio_acodec: LDO_REG4 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <3300000>;
				regulator-max-microvolt = <3300000>;
				regulator-name = "vccio_acodec";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vccio_sd: LDO_REG5 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <3300000>;
				regulator-name = "vccio_sd";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc3v3_pmu: LDO_REG6 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <3300000>;
				regulator-max-microvolt = <3300000>;
				regulator-name = "vcc3v3_pmu";
				regulator-state-mem {
					regulator-on-in-suspend;
					regulator-suspend-microvolt = <3300000>;
				};
			};

			vcca_1v8: LDO_REG7 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <1800000>;
				regulator-name = "vcca_1v8";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcca1v8_pmu: LDO_REG8 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <1800000>;
				regulator-name = "vcca1v8_pmu";
				regulator-state-mem {
					regulator-on-in-suspend;
					regulator-suspend-microvolt = <1800000>;
				};
			};

			vcca1v8_image: LDO_REG9 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <1800000>;
				regulator-name = "vcca1v8_image";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc_1v8: DCDC_REG5 {
				regulator-always-on;
				regulator-boot-on;
				regulator-min-microvolt = <1800000>;
				regulator-max-microvolt = <1800000>;
				regulator-name = "vcc_1v8";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc_3v3: SWITCH_REG1 {
				regulator-always-on;
				regulator-boot-on;
				regulator-name = "vcc_3v3";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};

			vcc3v3_sd: SWITCH_REG2 {
				regulator-always-on;
				regulator-boot-on;
				regulator-name = "vcc3v3_sd";
				regulator-state-mem {
					regulator-off-in-suspend;
				};
			};
		};
	};
};

&pmu_io_domains {
	status = "okay";
	pmuio2-supply = <&vcc3v3_pmu>;
	vccio1-supply = <&vccio_acodec>;
	vccio3-supply = <&vccio_sd>;
	vccio4-supply = <&vcc_1v8>;
	vccio5-supply = <&vcc_3v3>;
	vccio6-supply = <&vcc_1v8>;
	vccio7-supply = <&vcc_3v3>;
};

&pinctrl {
	pmic {
		pmic_int: pmic_int {
			rockchip,pins =
				<0 RK_PA3 RK_FUNC_GPIO &pcfg_pull_up>;
		};

		soc_slppin_gpio: soc_slppin_gpio {
			rockchip,pins =
				<0 RK_PA2 RK_FUNC_GPIO &pcfg_output_low_pull_down>;
		};

		soc_slppin_slp: soc_slppin_slp {
			rockchip,pins =
				<0 RK_PA2 1 &pcfg_pull_up>;
		};

		soc_slppin_rst: soc_slppin_rst {
			rockchip,pins =
				<0 RK_PA2 2 &pcfg_pull_none>;
		};
	};
};
  • 修改 arch/arm/dts/rockchip-pinconf.dtsi，增加一些 引脚相关的定义

在这里插入图片描述

  • 以上修改，可以参考 Linux kernel 中开发板设备树获取

验证

  • 经过完善 u-boot 下开发板设备树， rk3568 u-boot gmac 网络功能正常了，也不再依赖 Linux 内核的设备树，不再依赖 resouce 分区，可以单独编译并正常工作了

小结

  • 默认使用 rockchip 提供的 u-boot，通过读取 resouce 分区的Linux 设备树，可以正常的工作，如果想去掉这个依赖，需要 u-boot 关闭 resouce 分区，并且完善 u-boot 下的设备树，当前网络部分无法 ping 通问题主要是 缺少 rk809 电源管理 pmic 的配置

  • 通过不断摸搜，虽然没有写什么代码，只是更改了一些配置，让 RK3568 平台的 u-boot 回归到了原有的样子，去除了一些 rockchip 定制化的选项，可能这样做意义不是很大，不过有兴趣的可以尝试，比如自定义分区，不需要定义过多的额外的 resouce 等分区。

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