patch from JiSheng: fixed usage for option -M, added examples for testing

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22194 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/bus_managers/firewire/00README.haiku

@@ -92,6 +92,27 @@ IEEE 1394 support for haiku
 	Physical layer chip
 	- This does not matter, most physical layer chip should work
 
+6. Example
+	fwcontrol 
+	Output a list of devices that are connected to the bus
+
+	fwcontrol -t
+	Show the topology map
+
+	fwcontrol -c 0
+	Show the config rom of node 0
+
+	fwcontrol -r
+	trigger bus reset
+
+	fwcontrol -R mini.dv
+	Receive DV or MPEG TS stream and save it in mini.dv. Press Ctrl-C to
+	stop receiving data.
+	Note: the program will try to guess which mode first
+	
+	fwcontrol -M d -R mini.dv
+	Explicitly specify receiving via DV mode.
+
 References:
 [1] IEEE 1394-1995
 [2] IEEE 1394a-2000

src/bin/fwcontrol/fwcontrol.c

@@ -90,7 +90,7 @@ usage(void)
 		"fwcontrol [-u bus_num] [-rt] [-g gap_count] [-o node] "
 		    "[-b pri_req] [-c node] [-d node] [-l file] "
 #ifdef __HAIKU__
-		    "[-R file] [-S file] \n"
+		    "[-M mode] [-R file] [-S file] \n"
 #else
 		    "[-R file] [-S file] [-m target]\n"
 #endif
@@ -107,6 +107,7 @@ usage(void)
 		"\t-l: load and parse hex dump file of configuration ROM\n"
 		"\t-R: Receive DV or MPEG TS stream\n"
 #ifdef __HAIKU__
+		"\t-M: Specify either d for dv mode or m for mpeg mode\n"
 		"\t-S: Send DV stream\n");
 #else
 		"\t-S: Send DV stream\n"