#!/bin/sh hid_conf_directory="/sys/kernel/config/usb_gadget/obmc_hid" dev_name="1e6a0000.usb-vhub" create_hid() { # create gadget mkdir "${hid_conf_directory}" cd "${hid_conf_directory}" || exit 1 # add basic information echo 0x0100 > bcdDevice echo 0x0200 > bcdUSB echo 0x0104 > idProduct # Multifunction Composite Gadget echo 0x1d6b > idVendor # Linux Foundation # create English locale mkdir strings/0x409 echo "OpenBMC" > strings/0x409/manufacturer echo "Virtual Keyboard and Mouse" > strings/0x409/product echo "OBMC0001" > strings/0x409/serialnumber # Create HID keyboard function mkdir functions/hid.0 echo 1 > functions/hid.0/protocol # 1: keyboard echo 8 > functions/hid.0/report_length echo 1 > functions/hid.0/subclass # Binary HID keyboard descriptor # 0x05, 0x01, // USAGE_PAGE (Generic Desktop) # 0x09, 0x06, // USAGE (Keyboard) # 0xa1, 0x01, // COLLECTION (Application) # 0x05, 0x07, // USAGE_PAGE (Keyboard) # 0x19, 0xe0, // USAGE_MINIMUM (Keyboard LeftControl) # 0x29, 0xe7, // USAGE_MAXIMUM (Keyboard Right GUI) # 0x15, 0x00, // LOGICAL_MINIMUM (0) # 0x25, 0x01, // LOGICAL_MAXIMUM (1) # 0x75, 0x01, // REPORT_SIZE (1) # 0x95, 0x08, // REPORT_COUNT (8) # 0x81, 0x02, // INPUT (Data,Var,Abs) # 0x95, 0x01, // REPORT_COUNT (1) # 0x75, 0x08, // REPORT_SIZE (8) # 0x81, 0x03, // INPUT (Data,Var,Abs) # 0x95, 0x05, // REPORT_COUNT (5) # 0x75, 0x01, // REPORT_SIZE (1) # 0x05, 0x08, // USAGE_PAGE (LEDs) # 0x19, 0x01, // USAGE_MINIMUM (Num Lock) # 0x29, 0x05, // USAGE_MAXIMUM (Kana) # 0x91, 0x02, // OUTPUT (Data,Var,Abs) # 0x95, 0x01, // REPORT_COUNT (1) # 0x75, 0x03, // REPORT_SIZE (3) # 0x91, 0x03, // OUTPUT (Cnst,Var,Abs) # 0x95, 0x06, // REPORT_COUNT (6) # 0x75, 0x08, // REPORT_SIZE (8) # 0x15, 0x00, // LOGICAL_MINIMUM (0) # 0x25, 0x65, // LOGICAL_MAXIMUM (101) # 0x05, 0x07, // USAGE_PAGE (Keyboard) # 0x19, 0x00, // USAGE_MINIMUM (Reserved (no event indicated)) # 0x29, 0x65, // USAGE_MAXIMUM (Keyboard Application) # 0x81, 0x00, // INPUT (Data,Ary,Abs) # 0xc0 // END_COLLECTION printf '\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/hid.0/report_desc # Create HID mouse function mkdir functions/hid.1 echo 2 > functions/hid.1/protocol # 2: mouse echo 6 > functions/hid.1/report_length echo 1 > functions/hid.1/subclass # Binary HID mouse descriptor (absolute coordinate) # 0x05, 0x01, // USAGE_PAGE (Generic Desktop) # 0x09, 0x02, // USAGE (Mouse) # 0xa1, 0x01, // COLLECTION (Application) # 0x09, 0x01, // USAGE (Pointer) # 0xa1, 0x00, // COLLECTION (Physical) # 0x05, 0x09, // USAGE_PAGE (Button) # 0x19, 0x01, // USAGE_MINIMUM (Button 1) # 0x29, 0x03, // USAGE_MAXIMUM (Button 3) # 0x15, 0x00, // LOGICAL_MINIMUM (0) # 0x25, 0x01, // LOGICAL_MAXIMUM (1) # 0x95, 0x03, // REPORT_COUNT (3) # 0x75, 0x01, // REPORT_SIZE (1) # 0x81, 0x02, // INPUT (Data,Var,Abs) # 0x95, 0x01, // REPORT_COUNT (1) # 0x75, 0x05, // REPORT_SIZE (5) # 0x81, 0x03, // INPUT (Cnst,Var,Abs) # 0x05, 0x01, // USAGE_PAGE (Generic Desktop) # 0x09, 0x30, // USAGE (X) # 0x09, 0x31, // USAGE (Y) # 0x35, 0x00, // PHYSICAL_MINIMUM (0) # 0x46, 0xff, 0x7f, // PHYSICAL_MAXIMUM (32767) # 0x15, 0x00, // LOGICAL_MINIMUM (0) # 0x26, 0xff, 0x7f, // LOGICAL_MAXIMUM (32767) # 0x65, 0x11, // UNIT (SI Lin:Distance) # 0x55, 0x00, // UNIT_EXPONENT (0) # 0x75, 0x10, // REPORT_SIZE (16) # 0x95, 0x02, // REPORT_COUNT (2) # 0x81, 0x02, // INPUT (Data,Var,Abs) # 0x09, 0x38, // Usage (Wheel) # 0x15, 0xff, // LOGICAL_MINIMUM (-1) # 0x25, 0x01, // LOGICAL_MAXIMUM (1) # 0x35, 0x00, // PHYSICAL_MINIMUM (-127) # 0x45, 0x00, // PHYSICAL_MAXIMUM (127) # 0x75, 0x08, // REPORT_SIZE (8) # 0x95, 0x01, // REPORT_COUNT (1) # 0x81, 0x06, // INPUT (Data,Var,Rel) # 0xc0, // END_COLLECTION # 0xc0 // END_COLLECTION printf '\x05\x01\x09\x02\xa1\x01\x09\x01\xa1\x00\x05\x09\x19\x01\x29\x03\x15\x00\x25\x01\x95\x03\x75\x01\x81\x02\x95\x01\x75\x05\x81\x03\x05\x01\x09\x30\x09\x31\x35\x00\x46\xff\x7f\x15\x00\x26\xff\x7f\x65\x11\x55\x00\x75\x10\x95\x02\x81\x02\x09\x38\x15\xff\x25\x01\x35\x00\x45\x00\x75\x08\x95\x01\x81\x06\xc0\xc0' > functions/hid.1/report_desc # Create configuration mkdir configs/c.1 mkdir configs/c.1/strings/0x409 echo 0xe0 > configs/c.1/bmAttributes echo 200 > configs/c.1/MaxPower echo "" > configs/c.1/strings/0x409/configuration # Link HID functions to configuration ln -s functions/hid.0 configs/c.1 ln -s functions/hid.1 configs/c.1 } connect_hid() { if ! grep -q "${dev_name}:p" UDC; then i=0 num_ports=5 base_usb_dir="/sys/bus/platform/devices/${dev_name}/${dev_name}:p" while [ "${i}" -lt "${num_ports}" ]; do port=$(("${i}" + 1)) i="${port}" if [ ! -e "${base_usb_dir}${port}/gadget/suspended" ]; then break fi done echo "${dev_name}:p${port}" > UDC fi } disconnect_hid() { if grep -q "${dev_name}:p" UDC; then echo "" > UDC fi } if [ ! -e "${hid_conf_directory}" ]; then create_hid else cd "${hid_conf_directory}" || exit 1 fi if [ "$1" = "connect" ]; then connect_hid elif [ "$1" = "disconnect" ]; then disconnect_hid else echo >&2 "Invalid option: $1. Use 'connect' or 'disconnect'." exit 1 fi