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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
* Copyright (C) 2008 Ulf Jordan <jordan@chalmers.se>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <libpayload-config.h>
#include <libpayload.h>
#define IOBASE lib_sysinfo.serial->baseaddr
#define MEMBASE (phys_to_virt(IOBASE))
static int serial_hardware_is_present = 0;
static int serial_is_mem_mapped = 0;
static uint8_t serial_read_reg(int offset)
{
if (serial_is_mem_mapped)
return readb(MEMBASE + offset);
else
return inb(IOBASE + offset);
}
static void serial_write_reg(uint8_t val, int offset)
{
if (serial_is_mem_mapped)
writeb(val, MEMBASE + offset);
else
outb(val, IOBASE + offset);
}
#ifdef CONFIG_SERIAL_SET_SPEED
static void serial_hardware_init(int speed, int word_bits,
int parity, int stop_bits)
{
unsigned char reg;
/* Disable interrupts. */
serial_write_reg(0, 0x01);
/* Assert RTS and DTR. */
serial_write_reg(3, 0x04);
/* Set the divisor latch. */
reg = serial_read_reg(0x03);
serial_write_reg(reg | 0x80, 0x03);
/* Write the divisor. */
uint16_t divisor = 115200 / speed;
serial_write_reg(divisor & 0xFF, 0x00);
serial_write_reg(divisor >> 8, 0x01);
/* Restore the previous value of the divisor.
* And set 8 bits per character */
serial_write_reg((reg & ~0x80) | 3, 0x03);
}
#endif
static struct console_input_driver consin = {
.havekey = &serial_havechar,
.getchar = &serial_getchar
};
static struct console_output_driver consout = {
.putchar = &serial_putchar
};
void serial_init(void)
{
if (!lib_sysinfo.serial)
return;
serial_is_mem_mapped =
(lib_sysinfo.serial->type == CB_SERIAL_TYPE_MEMORY_MAPPED);
if (!serial_is_mem_mapped && (inb(IOBASE + 0x05) == 0xFF) &&
(inb(IOBASE + 0x06) == 0xFF)) {
return;
}
serial_hardware_is_present = 1;
#ifdef CONFIG_SERIAL_SET_SPEED
serial_hardware_init(CONFIG_SERIAL_BAUD_RATE, 8, 0, 1);
#endif
console_add_input_driver(&consin);
console_add_output_driver(&consout);
}
void serial_putchar(unsigned int c)
{
if (!serial_hardware_is_present)
return;
while ((serial_read_reg(0x05) & 0x20) == 0) ;
serial_write_reg(c, 0x00);
}
int serial_havechar(void)
{
if (!serial_hardware_is_present)
return 0;
return serial_read_reg(0x05) & 0x01;
}
int serial_getchar(void)
{
if (!serial_hardware_is_present)
return -1;
while (!serial_havechar()) ;
return serial_read_reg(0x00);
}
/* These are thinly veiled vt100 functions used by curses */
#define VT100_CLEAR "\e[H\e[J"
/* These defines will fail if you use bold and reverse at the same time.
* Switching off one of them will switch off both. tinycurses knows about
* this and does the right thing.
*/
#define VT100_SBOLD "\e[1m"
#define VT100_EBOLD "\e[m"
#define VT100_SREVERSE "\e[7m"
#define VT100_EREVERSE "\e[m"
#define VT100_CURSOR_ADDR "\e[%d;%dH"
#define VT100_CURSOR_ON "\e[?25l"
#define VT100_CURSOR_OFF "\e[?25h"
/* The following smacs/rmacs are actually for xterm; a real vt100 has
enacs=\E(B\E)0, smacs=^N, rmacs=^O. */
#define VT100_SMACS "\e(0"
#define VT100_RMACS "\e(B"
/* A vt100 doesn't do color, setaf/setab below are from xterm-color. */
#define VT100_SET_COLOR "\e[3%d;4%dm"
static void serial_putcmd(const char *str)
{
while (*str)
serial_putchar(*(str++));
}
void serial_clear(void)
{
serial_putcmd(VT100_CLEAR);
}
void serial_start_bold(void)
{
serial_putcmd(VT100_SBOLD);
}
void serial_end_bold(void)
{
serial_putcmd(VT100_EBOLD);
}
void serial_start_reverse(void)
{
serial_putcmd(VT100_SREVERSE);
}
void serial_end_reverse(void)
{
serial_putcmd(VT100_EREVERSE);
}
void serial_start_altcharset(void)
{
serial_putcmd(VT100_SMACS);
}
void serial_end_altcharset(void)
{
serial_putcmd(VT100_RMACS);
}
/**
* Set the foreground and background colors on the serial console.
*
* @param fg Foreground color number.
* @param bg Background color number.
*/
void serial_set_color(short fg, short bg)
{
char buffer[32];
snprintf(buffer, sizeof(buffer), VT100_SET_COLOR, fg, bg);
serial_putcmd(buffer);
}
void serial_set_cursor(int y, int x)
{
char buffer[32];
snprintf(buffer, sizeof(buffer), VT100_CURSOR_ADDR, y + 1, x + 1);
serial_putcmd(buffer);
}
void serial_cursor_enable(int state)
{
if (state)
serial_putcmd(VT100_CURSOR_ON);
else
serial_putcmd(VT100_CURSOR_OFF);
}
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