greybus: lsgb: add lsgb shell script

Horrid hack, but a start at making it easier for people to see what is
currently connected without having to deal with poking around in sysfs
directly.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/lsgb b/drivers/staging/greybus/lsgb
new file mode 100755 (executable)
index 0000000..4fb30d2
--- /dev/null
+++ b/drivers/staging/greybus/lsgb
@@ -0,0 +1,149 @@
+#!/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_interface() {
+       local devname=$1
+       local iid=`cat interface_id`
+       local vid=`cat vendor_id`
+       local pid=`cat product_id`
+       local version=`cat version`
+       local serial=`cat serial_number`
+       local vs=`cat vendor_string`
+       local ps=`cat product_string`
+       printf "Interface: %s %s:%s ver:%s \"%s\" \"%s\"\n"\
+               ${iid} ${vid} ${pid} ${version} "${vs}" "${ps}"
+}
+
+print_bundle() {
+       local devname=$1
+       local id=`cat bundle_id`
+       local 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="Sensoe"
+                               ;;
+               "0x0f" )        class_type="Lights"
+                               ;;
+               "0x10" )        class_type="Vibrator"
+                               ;;
+               "0x11" )        class_type="Loopback"
+                               ;;
+               "0x12" )        class_type="Audio Management"
+                               ;;
+               "0x13" )        class_type="Audio Data"
+                               ;;
+               "0x14" )        class_type="SVC"
+                               ;;
+               "0x15" )        class_type="Firmware"
+                               ;;
+               "0xfe" )        class_type="Raw"
+                               ;;
+               "0xff" )        class_type="Vendor"
+                               ;;
+       esac
+       printf "   Bundle: %s %s (%s)\n" ${id} ${class_type} ${class}
+}
+
+print_svc() {
+       local devname=$1
+       printf "      SVC: ${devname}\n"
+}
+
+print_host_device() {
+       local devname=$1
+       printf "     Host: ${devname}\n"
+}
+
+print_unknown() {
+       local devname=$1
+
+       printf "Unknown device type: ${devname}\n"
+}
+
+
+print_device() {
+       local dev=$1
+
+       [ -d $dev ] || return
+       cd $dev
+
+       local devname=`basename ${dev}`
+       local devtype=`cat uevent | grep DEVTYPE | cut -f 2 -d '='`
+       case ${devtype} in
+               greybus_interface )     print_interface ${devname}
+                                       ;;
+               greybus_bundle )        print_bundle ${devname}
+                                       ;;
+               greybus_svc )           print_svc ${devname}
+                                       ;;
+               greybus_host_device )   print_host_device ${devname}
+                                       ;;
+               * )                     print_unknown ${devname}
+                                       ;;
+       esac
+}
+
+for device in /sys/bus/greybus/devices/*
+do
+       print_device $device
+done