X-Git-Url: https://repo.jachan.dev/J-u-boot.git/blobdiff_plain/fc82e7684ba31a1a6ef721e7d750f37117906a70..d8533167f5612e97502566afb312f2ff4ae7fcdd:/tools/kwboot.c

diff --git a/tools/kwboot.c b/tools/kwboot.c
index 50ae2b4b77b..4be094c9c8d 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -286,6 +286,7 @@ kwboot_bootmsg(int tty, void *msg)
 {
 	int rc;
 	char c;
+	int count;
 
 	if (msg == NULL)
 		kwboot_printv("Please reboot the target into UART boot mode...");
@@ -297,10 +298,12 @@ kwboot_bootmsg(int tty, void *msg)
 		if (rc)
 			break;
 
-		rc = kwboot_tty_send(tty, msg, 8);
-		if (rc) {
-			usleep(msg_req_delay * 1000);
-			continue;
+		for (count = 0; count < 128; count++) {
+			rc = kwboot_tty_send(tty, msg, 8);
+			if (rc) {
+				usleep(msg_req_delay * 1000);
+				continue;
+			}
 		}
 
 		rc = kwboot_tty_recv(tty, &c, 1, msg_rsp_timeo);
@@ -426,6 +429,9 @@ kwboot_xmodem(int tty, const void *_data, size_t size)
 
 	kwboot_printv("Sending boot image...\n");
 
+	sleep(2); /* flush isn't effective without it */
+	tcflush(tty, TCIOFLUSH);
+
 	do {
 		struct kwboot_block block;
 		int n;