gadget-cleanup

#!/bin/sh -e
#
# Copyright (c) 2013-2020 Robert Nelson <[email protected]>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

#Based off:
#https://github.com/beagleboard/meta-beagleboard/blob/master/meta-beagleboard-extras/recipes-support/usb-gadget/gadget-init/g-ether-load.sh

log="am335x_evm:"

usb_gadget="/sys/kernel/config/usb_gadget"

#  idVendor           0x1d6b Linux Foundation
#  idProduct          0x0104 Multifunction Composite Gadget
#  bcdDevice            4.04
#  bcdUSB               2.00

usb_idVendor="0x1d6b"
usb_idProduct="0x0104"
usb_bcdDevice="0x0404"
usb_bcdUSB="0x0200"
usb_serialnr="000000"
usb_product="USB Device"

usb_iserialnumber="1234BBBK5678"
usb_imanufacturer="BeagleBoard.org"
usb_iproduct="BeagleBoneBlack"

#mac address:
#cpsw_0_mac = eth0 - wlan0 (in eeprom)
#cpsw_1_mac = usb0 (BeagleBone Side) (in eeprom)
#cpsw_2_mac = usb0 (USB host, pc side) ((cpsw_0_mac + cpsw_2_mac) /2 )
#cpsw_3_mac = wl18xx (AP) (cpsw_0_mac + 3)
#cpsw_4_mac = usb1 (BeagleBone Side)
#cpsw_5_mac = usb1 (USB host, pc side)

run_libcomposite () {
	if [ ! -d /sys/kernel/config/usb_gadget/g_multi/ ] ; then
		echo "${log} Creating g_multi"
		mkdir -p /sys/kernel/config/usb_gadget/g_multi || true
		cd /sys/kernel/config/usb_gadget/g_multi

		echo ${usb_bcdUSB} > bcdUSB
		echo ${usb_idVendor} > idVendor # Linux Foundation
		echo ${usb_idProduct} > idProduct # Multifunction Composite Gadget
		echo ${usb_bcdDevice} > bcdDevice

		#0x409 = english strings...
		mkdir -p strings/0x409

		echo ${usb_iserialnumber} > strings/0x409/serialnumber
		echo ${usb_imanufacturer} > strings/0x409/manufacturer
		echo ${usb_iproduct} > strings/0x409/product

		mkdir -p configs/c.1/strings/0x409
		echo "BeagleBone Composite" > configs/c.1/strings/0x409/configuration

		echo 500 > configs/c.1/MaxPower

		mkdir -p functions/rndis.usb0
		# first byte of address must be even
		#echo ${cpsw_2_mac} > functions/rndis.usb0/host_addr
		#echo ${cpsw_1_mac} > functions/rndis.usb0/dev_addr

		# Starting with kernel 4.14, we can do this to match Microsoft's built-in RNDIS driver.
		# Earlier kernels require the patch below as a work-around instead:
		# https://github.com/beagleboard/linux/commit/e94487c59cec8ba32dc1eb83900297858fdc590b
		if [ -f functions/rndis.usb0/class ]; then
			echo EF > functions/rndis.usb0/class
			echo 04 > functions/rndis.usb0/subclass
			echo 01 > functions/rndis.usb0/protocol
		fi

		# Add OS Descriptors for the latest Windows 10 rndiscmp.inf
		# https://answers.microsoft.com/en-us/windows/forum/windows_10-networking-winpc/windows-10-vs-remote-ndis-ethernet-usbgadget-not/cb30520a-753c-4219-b908-ad3d45590447
		# https://www.spinics.net/lists/linux-usb/msg107185.html
		echo 1 > os_desc/use
		echo CD > os_desc/b_vendor_code || true
		echo MSFT100 > os_desc/qw_sign
		echo "RNDIS" > functions/rndis.usb0/os_desc/interface.rndis/compatible_id
		echo "5162001" > functions/rndis.usb0/os_desc/interface.rndis/sub_compatible_id

		mkdir -p configs/c.1
		ln -s configs/c.1 os_desc
		mkdir -p functions/rndis.usb0/os_desc/interface.rndis/Icons
		echo 2 > functions/rndis.usb0/os_desc/interface.rndis/Icons/type
		echo "%SystemRoot%\\system32\\shell32.dll,-233" > functions/rndis.usb0/os_desc/interface.rndis/Icons/data
		mkdir -p functions/rndis.usb0/os_desc/interface.rndis/Label
		echo 1 > functions/rndis.usb0/os_desc/interface.rndis/Label/type
		echo "BeagleBone USB Ethernet" > functions/rndis.usb0/os_desc/interface.rndis/Label/data

		ln -s functions/rndis.usb0 configs/c.1/

		ln -s configs/c.1 os_desc
		mkdir functions/rndis.usb0/os_desc/interface.rndis/Icons
		echo 2 > functions/rndis.usb0/os_desc/interface.rndis/Icons/type
		echo "%SystemRoot%\\system32\\shell32.dll,-233" > functions/rndis.usb0/os_desc/interface.rndis/Icons/data
		mkdir functions/rndis.usb0/os_desc/interface.rndis/Label
		echo 1 > functions/rndis.usb0/os_desc/interface.rndis/Label/type
		echo "BeagleBone USB Ethernet" > functions/rndis.usb0/os_desc/interface.rndis/Label/data

		ln -s functions/rndis.usb0 configs/c.1/

		mkdir -p functions/ncm.usb0
		#echo ${cpsw_4_mac} > functions/ncm.usb0/host_addr
		#echo ${cpsw_5_mac} > functions/ncm.usb0/dev_addr

		ln -s functions/ncm.usb0 configs/c.1/

		mkdir -p functions/acm.usb0
		ln -s functions/acm.usb0 configs/c.1/
	fi

	ls /sys/class/udc/ > UDC

	echo "${log} g_multi Created"
}

use_libcomposite () {
	echo "${log} Looking for libcomposite"
	if [ -d /sys/kernel/config/usb_gadget/ ] ; then
		run_libcomposite
	fi
}

use_libcomposite

#