1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2007 OpenMoko, Inc.
3*4882a593Smuzhiyun * Written by Harald Welte <laforge@openmoko.org>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun /*
9*4882a593Smuzhiyun * Boot support
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun #include <common.h>
12*4882a593Smuzhiyun #include <command.h>
13*4882a593Smuzhiyun #include <stdio_dev.h>
14*4882a593Smuzhiyun #include <serial.h>
15*4882a593Smuzhiyun
do_terminal(cmd_tbl_t * cmd,int flag,int argc,char * const argv[])16*4882a593Smuzhiyun int do_terminal(cmd_tbl_t * cmd, int flag, int argc, char * const argv[])
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun int last_tilde = 0;
19*4882a593Smuzhiyun struct stdio_dev *dev = NULL;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun if (argc < 1)
22*4882a593Smuzhiyun return -1;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun /* Scan for selected output/input device */
25*4882a593Smuzhiyun dev = stdio_get_by_name(argv[1]);
26*4882a593Smuzhiyun if (!dev)
27*4882a593Smuzhiyun return -1;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun serial_reinit_all();
30*4882a593Smuzhiyun printf("Entering terminal mode for port %s\n", dev->name);
31*4882a593Smuzhiyun puts("Use '~.' to leave the terminal and get back to u-boot\n");
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun while (1) {
34*4882a593Smuzhiyun int c;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun /* read from console and display on serial port */
37*4882a593Smuzhiyun if (stdio_devices[0]->tstc()) {
38*4882a593Smuzhiyun c = stdio_devices[0]->getc();
39*4882a593Smuzhiyun if (last_tilde == 1) {
40*4882a593Smuzhiyun if (c == '.') {
41*4882a593Smuzhiyun putc(c);
42*4882a593Smuzhiyun putc('\n');
43*4882a593Smuzhiyun break;
44*4882a593Smuzhiyun } else {
45*4882a593Smuzhiyun last_tilde = 0;
46*4882a593Smuzhiyun /* write the delayed tilde */
47*4882a593Smuzhiyun dev->putc('~');
48*4882a593Smuzhiyun /* fall-through to print current
49*4882a593Smuzhiyun * character */
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun if (c == '~') {
53*4882a593Smuzhiyun last_tilde = 1;
54*4882a593Smuzhiyun puts("[u-boot]");
55*4882a593Smuzhiyun putc(c);
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun dev->putc(c);
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun /* read from serial port and display on console */
61*4882a593Smuzhiyun if (dev->tstc()) {
62*4882a593Smuzhiyun c = dev->getc();
63*4882a593Smuzhiyun putc(c);
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun return 0;
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun /***************************************************/
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun U_BOOT_CMD(
73*4882a593Smuzhiyun terminal, 3, 1, do_terminal,
74*4882a593Smuzhiyun "start terminal emulator",
75*4882a593Smuzhiyun ""
76*4882a593Smuzhiyun );
77