[people/ms/u-boot.git] / common / cmd_terminal.c

/*
 * (C) Copyright 2007 OpenMoko, Inc.
 * Written by Harald Welte <laforge@openmoko.org>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Boot support
 */
#include <common.h>
#include <command.h>
#include <devices.h>
#include <serial.h>

int do_terminal(cmd_tbl_t * cmd, int flag, int argc, char *argv[])
{
	int last_tilde = 0;
	device_t *dev = NULL;

	if (argc < 1)
		return -1;

	/* Scan for selected output/input device */
	dev = device_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",
	""
);
Commit	Line	Data
d16471ee HW	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 <devices.h>
c1de7a6d	30	#include <serial.h>
d16471ee	31
d16471ee HW	32	int do_terminal(cmd_tbl_t * cmd, int flag, int argc, char *argv[])
d16471ee HW	33	{
d16471ee HW	34	int last_tilde = 0;
	35	device_t *dev = NULL;
	36
	37	if (argc < 1)
	38	return -1;
	39
	40	/* Scan for selected output/input device */
c1de7a6d	41	dev = device_get_by_name(argv[1]);
d16471ee HW	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
	88	U_BOOT_CMD(
	89	terminal, 3, 1, do_terminal,
2fb2604d	90	"start terminal emulator",
d16471ee HW	91	""
d16471ee HW	92	);