add usb-host.sh

Signed-off-by: carbon <carbon@milkv.io>

device/milkv-duo256m-glibc-arm64-sd/overlay/mnt/system/usb-host.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+echo host > /proc/cviusb/otg_role >> /tmp/usb.log 2>&1
+

device/milkv-duo256m-musl-riscv64-sd/overlay/mnt/system/usb-host.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+echo host > /proc/cviusb/otg_role >> /tmp/usb.log 2>&1
+

device/milkv-duos-glibc-arm64-sd/overlay/mnt/system/usb-host.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+usb_en=453       # XGPIOB[5]
+usb_select=510   # XGPIOA[30]
+
+function set_gpio()
+{
+	local gpio_num=$1
+	local gpio_val=$2
+	local gpio_path="/sys/class/gpio/gpio${gpio_num}"
+
+	if test -d ${gpio_path}; then
+		echo "GPIO ${gpio_num} already exported" >> /tmp/usb.log 2>&1
+	else
+		echo ${gpio_num} > /sys/class/gpio/export
+	fi
+
+	echo out > ${gpio_path}/direction
+	sleep 0.1
+	echo ${gpio_val} > ${gpio_path}/value
+}
+
+set_gpio ${usb_select} 1
+sleep 0.5
+set_gpio ${usb_en} 1
+sleep 0.5
+
+echo host > /proc/cviusb/otg_role >> /tmp/usb.log 2>&1
+

device/milkv-duos-musl-riscv64-sd/overlay/mnt/system/usb-host.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+usb_en=453
+usb_select=510
+
+function set_gpio()
+{
+	local gpio_num=$1
+	local gpio_val=$2
+	local gpio_path="/sys/class/gpio/gpio${gpio_num}"
+
+	if test -d ${gpio_path}; then
+		echo "GPIO ${gpio_num} already exported" >> /tmp/usb.log 2>&1
+	else
+		echo ${gpio_num} > /sys/class/gpio/export
+	fi
+
+	echo out > ${gpio_path}/direction
+	sleep 0.1
+	echo ${gpio_val} > ${gpio_path}/value
+}
+
+set_gpio ${usb_select} 1
+sleep 0.5
+set_gpio ${usb_en} 1
+sleep 0.5
+
+echo host > /proc/cviusb/otg_role >> /tmp/usb.log 2>&1
+