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 #include <serial.h> 31 #include <linux/compiler.h> 32 33 static int sandbox_serial_init(void) 34 { 35 os_tty_raw(0); 36 return 0; 37 } 38 39 static void sandbox_serial_setbrg(void) 40 { 41 } 42 43 static void sandbox_serial_putc(const char ch) 44 { 45 os_write(1, &ch, 1); 46 } 47 48 static void sandbox_serial_puts(const char *str) 49 { 50 os_write(1, str, strlen(str)); 51 } 52 53 static int sandbox_serial_getc(void) 54 { 55 char buf; 56 ssize_t count; 57 58 count = os_read(0, &buf, 1); 59 return count == 1 ? buf : 0; 60 } 61 62 static int sandbox_serial_tstc(void) 63 { 64 return 0; 65 } 66 67 static struct serial_device sandbox_serial_drv = { 68 .name = "sandbox_serial", 69 .start = sandbox_serial_init, 70 .stop = NULL, 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, 76 }; 77 78 void sandbox_serial_initialize(void) 79 { 80 serial_register(&sandbox_serial_drv); 81 } 82 83 __weak struct serial_device *default_serial_console(void) 84 { 85 return &sandbox_serial_drv; 86 } 87