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 /* This is a hack - we convert the drawing characters to ASCII */
42 static unsigned char translate_special_chars(unsigned char c)
59 void serial_init(void)
61 #ifdef CONFIG_SERIAL_SET_SPEED
64 /* Disable interrupts. */
65 outb(0, IOBASE + 0x01);
67 /* Assert RTS and DTR. */
68 outb(3, IOBASE + 0x04);
70 /* Set the divisor latch. */
71 reg = inb(IOBASE + 0x03);
72 outb(reg | 0x80, IOBASE + 0x03);
74 /* Write the divisor. */
75 outb(DIVISOR & 0xFF, IOBASE);
76 outb(DIVISOR >> 8 & 0xFF, IOBASE + 1);
78 /* Restore the previous value of the divisor. */
79 outb(reg &= ~0x80, IOBASE + 0x03);
83 void serial_putchar(unsigned char c)
86 c = translate_special_chars(c);
88 while ((inb(IOBASE + 0x05) & 0x20) == 0) ;
92 int serial_havechar(void)
94 return inb(IOBASE + 0x05) & 0x01;
97 int serial_getchar(void)
99 while (!serial_havechar()) ;
100 return (int)inb(IOBASE);
103 /* These are thinly veiled vt100 functions used by curses */
105 #define VT100_CLEAR "\e[H\e[J"
106 #define VT100_SBOLD "\e[1m"
107 #define VT100_EBOLD "\e[m"
108 #define VT100_CURSOR_ADDR "\e[%d;%dH"
109 /* The following smacs/rmacs are actually for xterm; a real vt100 has
110 enacs=\E(B\E)0, smacs=^N, rmacs=^O. */
111 #define VT100_SMACS "\e(0"
112 #define VT100_RMACS "\e(B"
113 /* A vt100 doesn't do color, setaf/setab below are from xterm-color. */
114 #define VT100_SET_COLOR "\e[3%d;4%dm"
116 static void serial_putcmd(char *str)
119 serial_putchar(*(str++));
122 void serial_clear(void)
124 serial_putcmd(VT100_CLEAR);
127 void serial_start_bold(void)
129 serial_putcmd(VT100_SBOLD);
132 void serial_end_bold(void)
134 serial_putcmd(VT100_EBOLD);
137 void serial_start_altcharset(void)
139 serial_putcmd(VT100_SMACS);
142 void serial_end_altcharset(void)
144 serial_putcmd(VT100_RMACS);
148 * Set the foreground and background colors on the serial console.
150 * @param fg Foreground color number.
151 * @param bg Background color number.
153 void serial_set_color(short fg, short bg)
156 snprintf(buffer, sizeof(buffer), VT100_SET_COLOR, fg, bg);
157 serial_putcmd(buffer);
160 void serial_set_cursor(int y, int x)
163 snprintf(buffer, sizeof(buffer), VT100_CURSOR_ADDR, y + 1, x + 1);
164 serial_putcmd(buffer);