参考
- RK3568 学习笔记 : u-boot 千兆网络无法 ping 通PC问题的解决
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
[ ] 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
- 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。
-
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
- 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。