tools: kwboot: Allow to specify custom baudrate only in supported operations

Custom baudrate different than 115200 may be specified only when kwboot is
not going to send boot/debug message pattern or when it is going to send
boot message pattern with image file (in which case baudrate change happens
after sending kwbimage header). BootROM detects boot/debug message pattern
only at baudrate 115200.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 69d1be0..986f27c 100644 (file)
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -2133,6 +2133,12 @@ main(int argc, char **argv)
        if (optind != argc)
                goto usage;
 
+       /* boot and debug message use baudrate 115200 */
+       if (((bootmsg && !imgpath) || debugmsg) && baudrate != 115200) {
+               fprintf(stderr, "Baudrate other than 115200 cannot be used for this operation.\n");
+               goto usage;
+       }
+
        tty = kwboot_open_tty(ttypath, imgpath ? 115200 : baudrate);
        if (tty < 0) {
                perror(ttypath);