LXR uboot/common/cmd

   1/*
   2 * (C) Copyright 2007 OpenMoko, Inc.
   3 * Written by Harald Welte <laforge@openmoko.org>
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24/*
  25 * Boot support
  26 */
  27#include <common.h>
  28#include <command.h>
  29#include <stdio_dev.h>
  30#include <serial.h>
  31
  32int do_terminal(cmd_tbl_t * cmd, int flag, int argc, char *argv[])
  33{
  34        int last_tilde = 0;
  35        struct stdio_dev *dev = NULL;
  36
  37        if (argc < 1)
  38                return -1;
  39
  40        /* Scan for selected output/input device */
  41        dev = stdio_get_by_name(argv[1]);
  42        if (!dev)
  43                return -1;
  44
  45        serial_reinit_all();
  46        printf("Entering terminal mode for port %s\n", dev->name);
  47        puts("Use '~.' to leave the terminal and get back to u-boot\n");
  48
  49        while (1) {
  50                int c;
  51
  52                /* read from console and display on serial port */
  53                if (stdio_devices[0]->tstc()) {
  54                        c = stdio_devices[0]->getc();
  55                        if (last_tilde == 1) {
  56                                if (c == '.') {
  57                                        putc(c);
  58                                        putc('\n');
  59                                        break;
  60                                } else {
  61                                        last_tilde = 0;
  62                                        /* write the delayed tilde */
  63                                        dev->putc('~');
  64                                        /* fall-through to print current
  65                                         * character */
  66                                }
  67                        }
  68                        if (c == '~') {
  69                                last_tilde = 1;
  70                                puts("[u-boot]");
  71                                putc(c);
  72                        }
  73                        dev->putc(c);
  74                }
  75
  76                /* read from serial port and display on console */
  77                if (dev->tstc()) {
  78                        c = dev->getc();
  79                        putc(c);
  80                }
  81        }
  82        return 0;
  83}
  84
  85
  86/***************************************************/
  87
  88U_BOOT_CMD(
  89        terminal,       3,      1,      do_terminal,
  90        "start terminal emulator",
  91        ""
  92);
  93