summaryrefslogtreecommitdiff
path: root/cmd/terminal.c
diff options
context:
space:
mode:
Diffstat (limited to 'cmd/terminal.c')
-rw-r--r--cmd/terminal.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/cmd/terminal.c b/cmd/terminal.c
new file mode 100644
index 0000000..4b9c0b3
--- /dev/null
+++ b/cmd/terminal.c
@@ -0,0 +1,76 @@
+/*
+ * (C) Copyright 2007 OpenMoko, Inc.
+ * Written by Harald Welte <laforge@openmoko.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * Boot support
+ */
+#include <common.h>
+#include <command.h>
+#include <stdio_dev.h>
+#include <serial.h>
+
+int do_terminal(cmd_tbl_t * cmd, int flag, int argc, char * const argv[])
+{
+ int last_tilde = 0;
+ struct stdio_dev *dev = NULL;
+
+ if (argc < 1)
+ return -1;
+
+ /* Scan for selected output/input device */
+ dev = stdio_get_by_name(argv[1]);
+ if (!dev)
+ return -1;
+
+ serial_reinit_all();
+ printf("Entering terminal mode for port %s\n", dev->name);
+ puts("Use '~.' to leave the terminal and get back to u-boot\n");
+
+ while (1) {
+ int c;
+
+ /* read from console and display on serial port */
+ if (stdio_devices[0]->tstc()) {
+ c = stdio_devices[0]->getc();
+ if (last_tilde == 1) {
+ if (c == '.') {
+ putc(c);
+ putc('\n');
+ break;
+ } else {
+ last_tilde = 0;
+ /* write the delayed tilde */
+ dev->putc('~');
+ /* fall-through to print current
+ * character */
+ }
+ }
+ if (c == '~') {
+ last_tilde = 1;
+ puts("[u-boot]");
+ putc(c);
+ }
+ dev->putc(c);
+ }
+
+ /* read from serial port and display on console */
+ if (dev->tstc()) {
+ c = dev->getc();
+ putc(c);
+ }
+ }
+ return 0;
+}
+
+
+/***************************************************/
+
+U_BOOT_CMD(
+ terminal, 3, 1, do_terminal,
+ "start terminal emulator",
+ ""
+);