Add support for mouse input

Fixes #40
tiny-pilot · Aug 11, 2020 · c8b6563 · c8b6563
1 parent 3fe402f
commit c8b6563
Showing 1 changed file with 26 additions and 10 deletions.
diff --git a/scripts/usb-gadget/init-usb-gadget b/scripts/usb-gadget/init-usb-gadget
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Adapted from https://github.com/girst/hardpass-sendHID/blob/master/README.md
+# Configures USB gadgets per: https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt
 
 # Exit on first error.
 set -e
@@ -10,6 +10,10 @@ set -u
 
 modprobe libcomposite
 
+### Configure keyboard
+
+# Adapted from https://github.com/girst/hardpass-sendHID/blob/master/README.md
+
 cd /sys/kernel/config/usb_gadget/
 mkdir -p g1
 cd g1
@@ -23,16 +27,26 @@ STRINGS_DIR="strings/0x409"
 mkdir -p "$STRINGS_DIR"
 echo "6b65796d696d6570690" > "${STRINGS_DIR}/serialnumber"
 echo "tinypilot" > "${STRINGS_DIR}/manufacturer"
-echo "Generic USB Keyboard" > "${STRINGS_DIR}/product"
+echo "Multifunction USB Device" > "${STRINGS_DIR}/product"
 
-FUNCTIONS_DIR="functions/hid.usb0"
-mkdir -p "$FUNCTIONS_DIR"
-echo 1 > "${FUNCTIONS_DIR}/protocol" # Keyboard
-echo 1 > "${FUNCTIONS_DIR}/subclass" # Boot interface subclass
-echo 8 > "${FUNCTIONS_DIR}/report_length"
+# Keyboard
+KEYBOARD_FUNCTIONS_DIR="functions/hid.keyboard"
+mkdir -p "$KEYBOARD_FUNCTIONS_DIR"
+echo 1 > "${KEYBOARD_FUNCTIONS_DIR}/protocol" # Keyboard
+echo 1 > "${KEYBOARD_FUNCTIONS_DIR}/subclass" # Boot interface subclass
+echo 8 > "${KEYBOARD_FUNCTIONS_DIR}/report_length"
 # Write the report descriptor
 # Source: https://www.kernel.org/doc/html/latest/usb/gadget_hid.html
-echo -ne \\x05\\x01\\x09\\x06\\xa1\\x01\\x05\\x07\\x19\\xe0\\x29\\xe7\\x15\\x00\\x25\\x01\\x75\\x01\\x95\\x08\\x81\\x02\\x95\\x01\\x75\\x08\\x81\\x03\\x95\\x05\\x75\\x01\\x05\\x08\\x19\\x01\\x29\\x05\\x91\\x02\\x95\\x01\\x75\\x03\\x91\\x03\\x95\\x06\\x75\\x08\\x15\\x00\\x25\\x65\\x05\\x07\\x19\\x00\\x29\\x65\\x81\\x00\\xc0 > "${FUNCTIONS_DIR}/report_desc"
+echo -ne \\x05\\x01\\x09\\x06\\xa1\\x01\\x05\\x07\\x19\\xe0\\x29\\xe7\\x15\\x00\\x25\\x01\\x75\\x01\\x95\\x08\\x81\\x02\\x95\\x01\\x75\\x08\\x81\\x03\\x95\\x05\\x75\\x01\\x05\\x08\\x19\\x01\\x29\\x05\\x91\\x02\\x95\\x01\\x75\\x03\\x91\\x03\\x95\\x06\\x75\\x08\\x15\\x00\\x25\\x65\\x05\\x07\\x19\\x00\\x29\\x65\\x81\\x00\\xc0 > "${KEYBOARD_FUNCTIONS_DIR}/report_desc"
+
+# Mouse
+MOUSE_FUNCTIONS_DIR="functions/hid.mouse"
+mkdir -p "$MOUSE_FUNCTIONS_DIR"
+echo 2 > "${MOUSE_FUNCTIONS_DIR}/protocol" # Mouse
+echo 0 > "${MOUSE_FUNCTIONS_DIR}/subclass" # No subclass
+echo 4 > "${MOUSE_FUNCTIONS_DIR}/report_length"
+# Write the report descriptor
+echo -ne \\x05\\x01\\x09\\x02\\xA1\\x01\\x09\\x01\\xA1\\x00\\x05\\x09\\x19\\x01\\x29\\x05\\x15\\x00\\x25\\x01\\x95\\x05\\x75\\x01\\x81\\x02\\x95\\x01\\x75\\x03\\x81\\x01\\x05\\x01\\x09\\x30\\x09\\x31\\x09\\x38\\x15\\x81\\x25\\x7F\\x75\\x08\\x95\\x03\\x81\\x6\\xC0\\xC0 > "${MOUSE_FUNCTIONS_DIR}/report_desc"
 
 CONFIG_INDEX=1
 CONFIGS_DIR="configs/c.${CONFIG_INDEX}"
@@ -43,7 +57,9 @@ CONFIGS_STRINGS_DIR="${CONFIGS_DIR}/strings/0x409"
 mkdir -p "$CONFIGS_STRINGS_DIR"
 echo "Config ${CONFIG_INDEX}: ECM network" > "${CONFIGS_STRINGS_DIR}/configuration"
 
-ln -s "$FUNCTIONS_DIR" "${CONFIGS_DIR}/"
+ln -s "$KEYBOARD_FUNCTIONS_DIR" "${CONFIGS_DIR}/"
+ln -s "$MOUSE_FUNCTIONS_DIR" "${CONFIGS_DIR}/"
 ls /sys/class/udc > UDC
 
-chmod 777 /dev/hidg0
+chmod 777 /dev/hidg0
+chmod 777 /dev/hidg1