我发现是有个开机脚本给切换了...
#!/bin/sh # # Start the adbd.... # # config adb serialnumber for adb devices adb_serialnumber=/etc/.adb_sn disable_udc="/etc/.disable_udc" udc_config=/sys/kernel/config/usb_gadget/g1/UDC otg_role_file="/sys/devices/platform/soc/usbc0/otg_role" usb_device_file="/sys/devices/platform/soc/usbc0/usb_device" hardware_type=`cat /proc/cmdline | tr ' ' '\n' | grep 'hardware' | awk -F "=" '{print $2}'` function enable_udc(){ while [ 1 ];do udc=`ls /sys/class/udc 2>/dev/null` isudc=`cat $udc_config 2>/dev/null` if [ "x$isudc" = "x" ] && [ -f $udc_config ]; then echo $udc > $udc_config fi sleep 1 if [ -f $disable_udc ];then rm $disable_udc break fi done } function start_adb(){ serialnumber=$1 if [ "x$serialnumber" = "x" ];then serialnumber="0402101560" fi printf "Starting adb: " # for adbd compatibilities mkdir -p /system/ mkdir -p /system/bin if [ ! -f /system/bin/sh ];then ln -s /bin/sh /system/bin/sh fi # config ptmx mkdir -p /dev/pts mount -t devpts none /dev/pts # config adb function mount -t configfs none /sys/kernel/config > /dev/null 2>&1 mkdir -p /sys/kernel/config/usb_gadget/g1 echo "0x18d1" > /sys/kernel/config/usb_gadget/g1/idVendor echo "0x0002" > /sys/kernel/config/usb_gadget/g1/idProduct mkdir -p /sys/kernel/config/usb_gadget/g1/strings/0x409 echo "$serialnumber" > /sys/kernel/config/usb_gadget/g1/strings/0x409/serialnumber echo "Google.Inc" > /sys/kernel/config/usb_gadget/g1/strings/0x409/manufacturer echo "Configfs ffs gadget" > /sys/kernel/config/usb_gadget/g1/strings/0x409/product mkdir -p /sys/kernel/config/usb_gadget/g1/functions/ffs.adb mkdir -p /sys/kernel/config/usb_gadget/g1/configs/c.1 mkdir -p /sys/kernel/config/usb_gadget/g1/configs/c.1/strings/0x409 echo 0xc0 > /sys/kernel/config/usb_gadget/g1/configs/c.1/bmAttributes echo 500 > /sys/kernel/config/usb_gadget/g1/configs/c.1/MaxPower ln -s /sys/kernel/config/usb_gadget/g1/functions/ffs.adb/ /sys/kernel/config/usb_gadget/g1/configs/c.1/ffs.adb > /dev/null 2>&1 mkdir -p /dev/usb-ffs mkdir -p /dev/usb-ffs/adb if [ "x`ls -A /dev/usb-ffs/adb`" = "x" ];then mount -o uid=2000,gid=2000 -t functionfs adb /dev/usb-ffs/adb/ fi # start adbd daemon adbd & [ $? -eq 0 ] && echo "OK" || "FAIL" # enable_udc & } case "$1" in start|"") if [ "x$hardware_type" = "xsun8iw11p1" ];then otg_role_file="/sys/devices/platform/soc@1c00000/soc@1c00000:usbc0@0/otg_role" elif [ "x$hardware_type" = "xsun8iw20p1" ];then otg_role_file="/sys/devices/platform/soc@3000000/soc@3000000:usbc0@0/otg_role" fi [ -f "$otg_role_file" ] && otg_role=`cat "$otg_role_file"` echo "usb0 current mode: $otg_role" if [ -f "$otg_role_file" ] && [ "x$otg_role" != "xusb_device" ];then # force switch usb0 to device mode echo "Starting switch usb0 to device mode." if [ "x$hardware_type" = "xsun8iw11p1" ];then usb_device_file="/sys/devices/platform/soc@1c00000/soc@1c00000:usbc0@0/usb_device" elif [ "x$hardware_type" = "xsun8iw20p1" ];then usb_device_file="/sys/devices/platform/soc@3000000/soc@3000000:usbc0@0/usb_device" fi [ -f "$usb_device_file" ] && cat $usb_device_file fi [ -f $adb_serialnumber ] && serialnumber=`cat $adb_serialnumber` if [ "x$serialnumber" = "x" ];then serialnumber=`cat /proc/cmdline | tr ' ' '\n' | grep 'snum' | awk -F "=" '{print $2}'` fi start_adb $serialnumber ;; stop) printf "Stopping adbd " # touch $disable_udc # sleep 2 killall adbd & [ $? -eq 0 ] && echo "OK" || "FAIL" ;; restart|reload) "$0" stop "$0" start ;; *) echo "Usage: $0 {start|stop|restart}" exit 1 ;; esacL
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