1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * See file CREDITS for list of people who contributed to this 4 * project. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 19 * MA 02111-1307 USA 20 */ 21 22 /* 23 * This provide a test serial port. It provides an emulated serial port where 24 * a test program and read out the serial output and inject serial input for 25 * U-Boot. 26 */ 27 28 #include <common.h> 29 #include <os.h> 30 31 int serial_init(void) 32 { 33 os_tty_raw(0); 34 return 0; 35 } 36 37 void serial_setbrg(void) 38 { 39 } 40 41 void serial_putc(const char ch) 42 { 43 os_write(1, &ch, 1); 44 } 45 46 void serial_puts(const char *str) 47 { 48 os_write(1, str, strlen(str)); 49 } 50 51 int serial_getc(void) 52 { 53 char buf; 54 ssize_t count; 55 56 count = os_read(0, &buf, 1); 57 return count == 1 ? buf : 0; 58 } 59 60 int serial_tstc(void) 61 { 62 return 0; 63 } 64