英伟达Jetson TX2 默认只打开了一个USB3.0接口，而我们项目需要两个USB3.0接口，同时保留2lane PCIE 接三星 SSD M.2固态硬盘。需要更改默认配置
7.1 USB3.0 引脚定义
Jetson_TX2_TX2i_Module_DataSheet_v01.pdf 文件中定义的USB3.0 引脚定义
Jetson-TX2-Generic-Customer-Pinmux-Template.xlsm 文件中定义了引脚定义
引脚名可参考Jetson_TX2_TX2i_Pin_and_Function_Names_Guide_Application_Note.pdf
Table 8. Chip, Module, and Carrier Board Pinout
新C2 载板定义了USB引脚连接，只使用了USB3.0_0 USB3.0_1 两个USB3.0接口
而系统默认只开启了USB3.0_1，
参见Tegra_Linux_Driver_Package_TX2_Adaptation_Guide.pdf 中
7.2 修改tegra186-quill-power-tree-p3310-1000-a00-00.dtsi
hardware/nvidia/platform/t18x/common/kernel-dts/t18x-common-platforms/tegra186-quill-power-tree-p3310-1000-a00-00.dtsi 更改
vbus-2-supply = <&vdd_usb2_5v>; 改为 vbus-2-supply = <&battery_reg >;
vbus-0-supply = <&vdd_usb0_5v>;
vbus-1-supply = <&vdd_usb1_5v>;
vbus-2-supply = <&battery_reg>;
vbus-3-supply = <&battery_reg>;
vddio-hsic-supply = <&battery_reg>;
avdd_usb-supply = <&spmic_sd3>;
vclamp_usb-supply = <&spmic_sd2>;
avdd_pll_erefeut-supply = <&spmic_sd2>;
};
7.3 修改ODMDATA值
修改jetpack/64_TX2/Linux_for_Tegra/p2771-0000.conf.common ODMDATA的值修改为0x3090000， 改成了配置6，2个USB3.0
process_board_version()
{
local kerndtbfab="-c03"; # default = C03
ODMDATA=0x3090000; # default = C0X
7.4 修改USB-Lane Mapping
USB lane mapping information is in TX2 adaptation guide. To change the configuration correctly, you need to notice if plugin-manager is working or not.(以下内核打印信息 dmesg 查看)
[ 0.142498] node /plugin-manager/fragment-500-pcie-config match with board >=3310-1000-500
[ 0.142936] node /plugin-manager/fragment-500-xusb-config match with board >=3310-1000-500
[ 0.143213] node /plugin-manager/fragment-500-e3325-pcie match with board >=3310-1000-500
修改
hardware/nvidia/platform/t18x/common/kernel-dts/t18x-common-plugin-manager/tegra186-quill-p3310-1000-a00-plugin-manager.dtsi关于上面的片段
fragment-500-pcie-config {
ids = ">=3310-1000-500";
target = <&tegra_pcie>;
_overlay_ {
nvidia,num-lanes = <2>;
};
nvidia,num-lanes = <1>;
};
nvidia,num-lanes = <1>;
};
};
};
};
/***************************************************************
fragment-500-xusb-config {
ids = ">=3310-1000-500";
target = <&{/[email protected]}>;
_overlay_ {
phys = <&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(0)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(1)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(2)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_USB3_P(0)>;
phy-names = "utmi-0", "utmi-1", "utmi-2", "usb3-0";
};
};
target = <&tegra_xusb_padctl_pinmux_default>;
_overlay_ {
usb3-std-A-port2 {
nvidia,lanes = "usb3-0";
};
e3325-usb3-std-A-HS {
status = "okay";
};
};
};
};
************************************************************/
/*****************************************
fragment-500-e3325-pcie {
enable-override-on-all-matches;
ids = ">=3310-1000-500";
odm-data = "enable-pcie-on-uphy-lane0";
target = <&{/[email protected]}>;
_overlay_ {
phys = <&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(0)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(1)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(2)>;
phy-names = "utmi-0", "utmi-1", "utmi-2";
};
};
target = <&tegra_xusb_padctl_pinmux_default>;
_overlay_ {
usb3-std-A-port2 {
status = "disabled";
};
};
};
target = <&tegra_main_gpio>;
_overlay_ {
pcie0_lane2_mux {
status = "okay";
};
};
};
};
*********************************************************/
7.5 将修改tegra186-quill-p3310-1000-c03-00-base.dts
hardware/nvidia/platform/t18x/quill/kernel-dts/tegra186-quill-p3310-1000-c03-00-base.dts
sdmmc-wake-support-input {
status = "okay";
};
sdmmc-wake-support-output {
status = "okay";
};
pcie0_lane2_mux {
status = "disabled";
};
};
nvidia,num-lanes = <2>;
nvidia,disable-clock-request;
status = "okay";
};
nvidia,num-lanes = <1>;
status = "okay";
};
nvidia,num-lanes = <1>;
status = "disabled";
};
};
phys = <&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(0)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(1)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_UTMI_P(2)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_USB3_P(0)>,
<&tegra_xusb_padctl TEGRA_PADCTL_PHY_USB3_P(1)>;
phy-names = "utmi-0", "utmi-1", "utmi-2", "usb3-0", "usb3-1";
};
pinmux {
usb3-std-A-port2 {
nvidia,lanes = "usb3-0";
nvidia,port-cap = <TEGRA_PADCTL_PORT_HOST_ONLY>;
status = "okay";
};
usb3-std-A-port3 {
nvidia,lanes = "usb3-1";
nvidia,port-cap = <TEGRA_PADCTL_PORT_HOST_ONLY>;
status = "okay";
};
e3325-usb3-std-A-HS {
status = "okay"; //This is usb2.0 port on M.2
};
};
};
7.5 将修改tegra186-quill-p3310-1000-a00-00-base.dts
hardware/nvidia/platform/t18x/quill/kernel-dts/tegra186-quill-p3310-1000-a00-00-base.dts
chosen {
bootargs = "root=/dev/mmcblk0p1 rw rootwait fbcon=map:0 net.ifnames=0 console=tty0 OS=l4t console=ttyS0,115200n8 ";
board-has-eeprom;
stdout-path = "/[email protected]";
plugin-manager {
odm-data {
l4t;
};
};
};
7.6 编译内核模块
export CROSS_COMPILE=aarch64-linux-gnu-
export TEGRA_KERNEL_OUT=./kernel_out
export ARCH=arm64
mkdir $TEGRA_KERNEL_OUT
make O=$TEGRA_KERNEL_OUT modules
make O=$TEGRA_KERNEL_OUT modules_install
编译完成后 内核模块位于 ubuntu /lib/modules/目录下
注意：编译完成的内核模块 4.4.38 需要拷贝至 TX2 /lib/modules目录下,否则固态硬盘无法使用
注意: /lib/modules/4.4.38 目录下的build目录指向kernel_out目录，需要删除链接文件 并且创建build目录
在kernel_out 执行make clean 后，将该目录下所有的文件拷贝至 /lib/modules/4.4.38/build目录下