lsgb

#!/system/bin/sh
#
# 'ls greybus'
#
# Copyright 2016 Google Inc.
# All rights reserved.
#
###############################################################################
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from this
# software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
###############################################################################

# Horrid hack to just make it easier than poking around directly in sysfs
# Don't rely on any of these fields to be stable, the layout is going to
# change a lot over time.
#

print_module() {
	local devname=$1
	local mid

	mid=$(cat module_id)
	printf "  Module %02d\n" "${mid}"

	local modulename=$(basename $devname)
	# Process Interfaces
	for dir in $devname/$modulename\.*
	do
		print_device $dir
	done
}

print_interface() {
	local devname=$1
	local iid
	local vid
	local pid
	local serial

	iid=$(cat interface_id)
	vid=$(cat vendor_id)
	pid=$(cat product_id)
	serial=$(cat serial_number)
	printf "    Intf %02d %s:%s sn:%s\n"	\
		"${iid}" "${vid}" "${pid}" \
		"${serial}"

	local intfname=$(basename $devname)
	# Process Bundles
	for dir in $devname/$intfname\.*
	do
		print_device $dir
	done
}

print_control() {
	local vs
	local ps

	vs=$(cat vendor_string) || true
	ps=$(cat product_string) || true

	printf "      Control (%s / %s)\n" "${vs}" "${ps}"
}

print_bundle() {
	local devname=$1
	local id
	local class

	id=$(cat bundle_id)
	class=$(cat bundle_class)
	local class_type="unknown"
	case ${class} in
		"0x01" )	class_type="SVC"
				;;
		"0x02" )	class_type="GPIO"
				;;
		"0x03" )	class_type="I2C"
				;;
		"0x04" )	class_type="UART"
				;;
		"0x05" )	class_type="HID"
				;;
		"0x06" )	class_type="USB"
				;;
		"0x07" )	class_type="SDIO"
				;;
		"0x08" )	class_type="Power Supply"
				;;
		"0x09" )	class_type="PWM"
				;;
		"0x0a" )	class_type="unknown"
				;;
		"0x0b" )	class_type="SPI"
				;;
		"0x0c" )	class_type="Display"
				;;
		"0x0d" )	class_type="Camera"
				;;
		"0x0e" )	class_type="Sensor"
				;;
		"0x0f" )	class_type="Lights"
				;;
		"0x10" )	class_type="Vibrator"
				;;
		"0x11" )	class_type="Loopback"
				;;
		"0x12" )	class_type="Audio"
				;;
		"0x14" )	class_type="SVC"
				;;
		"0x15" )	class_type="Bootrom"
				;;
		"0x16" )	class_type="Firmware Management"
				;;
		"0xfe" )	class_type="Raw"
				;;
		"0xff" )	class_type="Vendor"
				;;
		* )		class_type="UNKNOWN"
				;;
	esac
	printf "      Bundle %02d Class %s (%s)\n" "${id}" "${class}" "${class_type}"
}

print_svc() {
	local devname=$1
	local bus

	bus=$(grep BUS uevent | cut -f 2 -d '=')
	printf "  SVC %02d\n" "${bus}"
}

print_host_device() {
	local devname=$1
	local busnum=$(echo $(basename $devname) | sed 's/greybus//g');
	local bus

	bus=$(grep BUS uevent | cut -f 2 -d '=')
	printf "Bus %02d\n" "${bus}"

	# Process SVC and Modules
	for dir in $devname/$busnum-*
	do
		print_device $dir
	done
}

print_unknown() {
	local devname=$1
	local devtype=$2

	printf "Unknown device type '%s' with name '%s'\n" "${devtype}" "${devname}"
}

print_device() {
	local devname=$1
	local devtype

	[ -d "${devname}" ] || return
	cd "${devname}" || return

	devtype=$(grep DEVTYPE uevent | cut -f 2 -d '=')
	case ${devtype} in
		greybus_module )	print_module "${devname}"
					;;
		greybus_interface )	print_interface "${devname}"
					;;
		greybus_control )	print_control "${devname}"
					;;
		greybus_bundle )	print_bundle "${devname}"
					;;
		greybus_svc )		print_svc "${devname}"
					;;
		greybus_host_device )	print_host_device "${devname}"
					;;
		* )			print_unknown "${devname}" "${devtype}"
					;;
	esac
}

for device in /sys/bus/greybus/devices/greybus*
do
	print_device "${device}"
done