drivers/serial/sandbox.c

   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         return 0;
  34 }
  35
  36 void serial_setbrg(void)
  37 {
  38 }
  39
  40 void serial_putc(const char ch)
  41 {
  42         os_write(1, &ch, 1);
  43 }
  44
  45 void serial_puts(const char *str)
  46 {
  47         while (*str)
  48                 serial_putc(*str++);
  49 }
  50
  51 int serial_getc(void)
  52 {
  53         char buf;
  54         int 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 }