Fix the help, and print a message when nothing happens

The help implied that writes happen by default, which they don't. Fix
the text, and say something when we dont specify any commands.

Corresponding to flashrom svn r141 and coreboot v2 svn r2820.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>    
Acked-by: Stefan Reinauer <stepan@coresystems.de>

flashrom.c

@@ -195,8 +195,7 @@ void usage(const char *name)
 	printf("       [-e exclude_end] [-m vendor:part] [-l file.layout] [-i imagename] [file]\n");
 	printf
 	    ("   -r | --read:                    read flash and save into file\n"
-	     "   -w | --write:                   write file into flash (default when\n"
-	     "                                   file is specified)\n"
+	     "   -w | --write:                   write file into flash\n"
 	     "   -v | --verify:                  verify flash against file\n"
 	     "   -E | --erase:                   erase flash device\n"
 	     "   -V | --verbose:                 more verbose output\n"
@@ -366,15 +365,22 @@ int main(int argc, char *argv[])
 
 	if ((flash = probe_flash(flashchips)) == NULL) {
 		printf("No EEPROM/flash device found.\n");
+		// FIXME: flash writes stay enabled!
 		exit(1);
 	}
 
 	printf("Flash part is %s (%d KB)\n", flash->name, flash->total_size);
 
+	if (!(read_it | write_it | verify_it | erase_it)) {
+		printf("No operations were specified.\n");
+		// FIXME: flash writes stay enabled!
+		exit(1);
+	}
+
 	if (!filename && !erase_it) {
-		// FIXME: Do we really want this feature implicitly?
-		printf("OK, only ENABLING flash write, but NOT FLASHING.\n");
-		return 0;
+		printf("Error: No filename specified.\n");
+		// FIXME: flash writes stay enabled!
+		exit(1);
 	}
 
 	size = flash->total_size * 1024;