2 * Copyright (c) 2011 The Chromium OS Authors.
3 * See file CREDITS for list of people who contributed to this
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.
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.
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,
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
31 #include <linux/compiler.h>
33 static int sandbox_serial_init(void)
39 static void sandbox_serial_setbrg(void)
43 static void sandbox_serial_putc(const char ch)
48 static void sandbox_serial_puts(const char *str)
50 os_write(1, str, strlen(str));
53 static int sandbox_serial_getc(void)
58 count = os_read(0, &buf, 1);
59 return count == 1 ? buf : 0;
62 static int sandbox_serial_tstc(void)
67 static struct serial_device sandbox_serial_drv = {
68 .name = "sandbox_serial",
69 .start = sandbox_serial_init,
71 .setbrg = sandbox_serial_setbrg,
72 .putc = sandbox_serial_putc,
73 .puts = sandbox_serial_puts,
74 .getc = sandbox_serial_getc,
75 .tstc = sandbox_serial_tstc,
78 void sandbox_serial_initialize(void)
80 serial_register(&sandbox_serial_drv);
83 __weak struct serial_device *default_serial_console(void)
85 return &sandbox_serial_drv;