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1# Note: superuser permission is required to run usbhid-dump
2# successfully.
3
4# HEX keys are according to the USB HID spec and USB HID usage table
5# We can add more keys as needed in the future.
6
7# This test may not be very accurate, as we only look for the first
8# two lines of a descriptor section. Example:
9#
10# 001:003:000:DESCRIPTOR 1460501386.337809
11# 05 01 09 02 A1 01 09 01 A1 00 05 09 19 01 29 03
12# 15 00 25 01 95 03 75 01 81 02 .. .. .. .. .. ..
13# .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
14#
15# By doing so we eliminate false matches when HEX keys are in the lines
16# in the middle of the whole descriptor section.
17
18if type usbhid-dump &>/dev/null; then
19 if USBHID_DUMP_OUTPUT=$(usbhid-dump -e descriptor 2>/dev/null|grep -A1 DESCRIPTOR); then
20 # checker for generic USB HID keyboard
21 USBHID_KBD_CMD="grep -E '^ 05 01 09 06'"
22
23 # checker for touch screen
24 USBHID_TS_CMD="grep -E '^ 05 0D 09 04'"
25
26 if echo "$USBHID_DUMP_OUTPUT"|eval $USBHID_TS_CMD &>/dev/null; then
27 HAVE_TOUCHSCREEN=1
28 fi
29
30 if echo "$USBHID_DUMP_OUTPUT"|eval $USBHID_KBD_CMD &>/dev/null; then
31 HAVE_KEYBOARD=1
32 else
33 # config script in OE will set HAVE_KEYBOARD=1
34 # if we don't set any value. We have to explicitly
35 # tell it when keyboard is not detected.
36 HAVE_KEYBOARD=0
37 fi
38 fi
39fi