/* * (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", "" );