2 * This file is part of the libpayload project.
4 * Copyright (C) 2008 Advanced Micro Devices, Inc.
5 * Copyright (C) 2008 Ulf Jordan <jordan@chalmers.se>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <libpayload.h>
34 #define IOBASE lib_sysinfo.ser_ioport
36 #ifdef CONFIG_SERIAL_SET_SPEED
37 #define DIVISOR (115200 / CONFIG_SERIAL_BAUD_RATE)
40 void serial_init(void)
42 #ifdef CONFIG_SERIAL_SET_SPEED
45 /* Disable interrupts. */
46 outb(0, IOBASE + 0x01);
48 /* Assert RTS and DTR. */
49 outb(3, IOBASE + 0x04);
51 /* Set the divisor latch. */
52 reg = inb(IOBASE + 0x03);
53 outb(reg | 0x80, IOBASE + 0x03);
55 /* Write the divisor. */
56 outb(DIVISOR & 0xFF, IOBASE);
57 outb(DIVISOR >> 8 & 0xFF, IOBASE + 1);
59 /* Restore the previous value of the divisor. */
60 outb(reg &= ~0x80, IOBASE + 0x03);
64 void serial_putchar(unsigned char c)
66 while ((inb(IOBASE + 0x05) & 0x20) == 0) ;
70 int serial_havechar(void)
72 return inb(IOBASE + 0x05) & 0x01;
75 int serial_getchar(void)
77 while (!serial_havechar()) ;
78 return (int)inb(IOBASE);
81 /* These are thinly veiled vt100 functions used by curses */
83 #define VT100_CLEAR "\e[H\e[J"
84 #define VT100_SBOLD "\e[1m"
85 #define VT100_EBOLD "\e[m"
86 #define VT100_CURSOR_ADDR "\e[%d;%dH"
87 /* The following smacs/rmacs are actually for xterm; a real vt100 has
88 enacs=\E(B\E)0, smacs=^N, rmacs=^O. */
89 #define VT100_SMACS "\e(0"
90 #define VT100_RMACS "\e(B"
91 /* A vt100 doesn't do color, setaf/setab below are from xterm-color. */
92 #define VT100_SET_COLOR "\e[3%d;4%dm"
94 static void serial_putcmd(char *str)
97 serial_putchar(*(str++));
100 void serial_clear(void)
102 serial_putcmd(VT100_CLEAR);
105 void serial_start_bold(void)
107 serial_putcmd(VT100_SBOLD);
110 void serial_end_bold(void)
112 serial_putcmd(VT100_EBOLD);
115 void serial_start_altcharset(void)
117 serial_putcmd(VT100_SMACS);
120 void serial_end_altcharset(void)
122 serial_putcmd(VT100_RMACS);
126 * Set the foreground and background colors on the serial console.
128 * @param fg Foreground color number.
129 * @param bg Background color number.
131 void serial_set_color(short fg, short bg)
134 snprintf(buffer, sizeof(buffer), VT100_SET_COLOR, fg, bg);
135 serial_putcmd(buffer);
138 void serial_set_cursor(int y, int x)
141 snprintf(buffer, sizeof(buffer), VT100_CURSOR_ADDR, y + 1, x + 1);
142 serial_putcmd(buffer);