1*2e192b24SSimon Glass /*
2*2e192b24SSimon Glass * (C) Copyright 2007 OpenMoko, Inc.
3*2e192b24SSimon Glass * Written by Harald Welte <laforge@openmoko.org>
4*2e192b24SSimon Glass *
5*2e192b24SSimon Glass * SPDX-License-Identifier: GPL-2.0+
6*2e192b24SSimon Glass */
7*2e192b24SSimon Glass
8*2e192b24SSimon Glass /*
9*2e192b24SSimon Glass * Boot support
10*2e192b24SSimon Glass */
11*2e192b24SSimon Glass #include <common.h>
12*2e192b24SSimon Glass #include <command.h>
13*2e192b24SSimon Glass #include <stdio_dev.h>
14*2e192b24SSimon Glass #include <serial.h>
15*2e192b24SSimon Glass
do_terminal(cmd_tbl_t * cmd,int flag,int argc,char * const argv[])16*2e192b24SSimon Glass int do_terminal(cmd_tbl_t * cmd, int flag, int argc, char * const argv[])
17*2e192b24SSimon Glass {
18*2e192b24SSimon Glass int last_tilde = 0;
19*2e192b24SSimon Glass struct stdio_dev *dev = NULL;
20*2e192b24SSimon Glass
21*2e192b24SSimon Glass if (argc < 1)
22*2e192b24SSimon Glass return -1;
23*2e192b24SSimon Glass
24*2e192b24SSimon Glass /* Scan for selected output/input device */
25*2e192b24SSimon Glass dev = stdio_get_by_name(argv[1]);
26*2e192b24SSimon Glass if (!dev)
27*2e192b24SSimon Glass return -1;
28*2e192b24SSimon Glass
29*2e192b24SSimon Glass serial_reinit_all();
30*2e192b24SSimon Glass printf("Entering terminal mode for port %s\n", dev->name);
31*2e192b24SSimon Glass puts("Use '~.' to leave the terminal and get back to u-boot\n");
32*2e192b24SSimon Glass
33*2e192b24SSimon Glass while (1) {
34*2e192b24SSimon Glass int c;
35*2e192b24SSimon Glass
36*2e192b24SSimon Glass /* read from console and display on serial port */
37*2e192b24SSimon Glass if (stdio_devices[0]->tstc()) {
38*2e192b24SSimon Glass c = stdio_devices[0]->getc();
39*2e192b24SSimon Glass if (last_tilde == 1) {
40*2e192b24SSimon Glass if (c == '.') {
41*2e192b24SSimon Glass putc(c);
42*2e192b24SSimon Glass putc('\n');
43*2e192b24SSimon Glass break;
44*2e192b24SSimon Glass } else {
45*2e192b24SSimon Glass last_tilde = 0;
46*2e192b24SSimon Glass /* write the delayed tilde */
47*2e192b24SSimon Glass dev->putc('~');
48*2e192b24SSimon Glass /* fall-through to print current
49*2e192b24SSimon Glass * character */
50*2e192b24SSimon Glass }
51*2e192b24SSimon Glass }
52*2e192b24SSimon Glass if (c == '~') {
53*2e192b24SSimon Glass last_tilde = 1;
54*2e192b24SSimon Glass puts("[u-boot]");
55*2e192b24SSimon Glass putc(c);
56*2e192b24SSimon Glass }
57*2e192b24SSimon Glass dev->putc(c);
58*2e192b24SSimon Glass }
59*2e192b24SSimon Glass
60*2e192b24SSimon Glass /* read from serial port and display on console */
61*2e192b24SSimon Glass if (dev->tstc()) {
62*2e192b24SSimon Glass c = dev->getc();
63*2e192b24SSimon Glass putc(c);
64*2e192b24SSimon Glass }
65*2e192b24SSimon Glass }
66*2e192b24SSimon Glass return 0;
67*2e192b24SSimon Glass }
68*2e192b24SSimon Glass
69*2e192b24SSimon Glass
70*2e192b24SSimon Glass /***************************************************/
71*2e192b24SSimon Glass
72*2e192b24SSimon Glass U_BOOT_CMD(
73*2e192b24SSimon Glass terminal, 3, 1, do_terminal,
74*2e192b24SSimon Glass "start terminal emulator",
75*2e192b24SSimon Glass ""
76*2e192b24SSimon Glass );
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