1#!/bin/sh
2# This validates that the kernel will load firmware out of its list of
3# firmware locations on disk. Since the user helper does similar work,
4# we reset the custom load directory to a location the user helper doesn't
5# know so we can be sure we're not accidentally testing the user helper.
6set -e
7
8modprobe test_firmware
9
10DIR=/sys/devices/virtual/misc/test_firmware
11
12OLD_TIMEOUT=$(cat /sys/class/firmware/timeout)
13OLD_FWPATH=$(cat /sys/module/firmware_class/parameters/path)
14
15FWPATH=$(mktemp -d)
16FW="$FWPATH/test-firmware.bin"
17
18test_finish()
19{
20	echo "$OLD_TIMEOUT" >/sys/class/firmware/timeout
21	echo -n "$OLD_PATH" >/sys/module/firmware_class/parameters/path
22	rm -f "$FW"
23	rmdir "$FWPATH"
24}
25
26trap "test_finish" EXIT
27
28# Turn down the timeout so failures don't take so long.
29echo 1 >/sys/class/firmware/timeout
30# Set the kernel search path.
31echo -n "$FWPATH" >/sys/module/firmware_class/parameters/path
32
33# This is an unlikely real-world firmware content. :)
34echo "ABCD0123" >"$FW"
35
36NAME=$(basename "$FW")
37
38# Request a firmware that doesn't exist, it should fail.
39echo -n "nope-$NAME" >"$DIR"/trigger_request
40if diff -q "$FW" /dev/test_firmware >/dev/null ; then
41	echo "$0: firmware was not expected to match" >&2
42	exit 1
43else
44	echo "$0: timeout works"
45fi
46
47# This should succeed via kernel load or will fail after 1 second after
48# being handed over to the user helper, which won't find the fw either.
49if ! echo -n "$NAME" >"$DIR"/trigger_request ; then
50	echo "$0: could not trigger request" >&2
51	exit 1
52fi
53
54# Verify the contents are what we expect.
55if ! diff -q "$FW" /dev/test_firmware >/dev/null ; then
56	echo "$0: firmware was not loaded" >&2
57	exit 1
58else
59	echo "$0: filesystem loading works"
60fi
61
62exit 0
63