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-rw-r--r--tools/usb/testusb.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/tools/usb/testusb.c b/tools/usb/testusb.c
index 82d7c590c02..b0adb2710c0 100644
--- a/tools/usb/testusb.c
+++ b/tools/usb/testusb.c
@@ -425,7 +425,7 @@ int main (int argc, char **argv)
/* for easy use when hotplugging */
device = getenv ("DEVICE");
- while ((c = getopt (argc, argv, "D:aA:c:g:hns:t:v:")) != EOF)
+ while ((c = getopt (argc, argv, "D:aA:c:g:hlns:t:v:")) != EOF)
switch (c) {
case 'D': /* device, if only one */
device = optarg;
@@ -468,10 +468,21 @@ int main (int argc, char **argv)
case 'h':
default:
usage:
- fprintf (stderr, "usage: %s [-n] [-D dev | -a | -A usbfs-dir]\n"
- "\t[-c iterations] [-t testnum]\n"
- "\t[-s packetsize] [-g sglen] [-v vary]\n",
- argv [0]);
+ fprintf (stderr,
+ "usage: %s [options]\n"
+ "Options:\n"
+ "\t-D dev only test specific device\n"
+ "\t-A usbfs-dir\n"
+ "\t-a test all recognized devices\n"
+ "\t-l loop forever(for stress test)\n"
+ "\t-t testnum only run specified case\n"
+ "\t-n no test running, show devices to be tested\n"
+ "Case arguments:\n"
+ "\t-c iterations default 1000\n"
+ "\t-s packetsize default 512\n"
+ "\t-g sglen default 32\n"
+ "\t-v vary default 512\n",
+ argv[0]);
return 1;
}
if (optind != argc)