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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* 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>
#include <video_console.h>
#ifdef CONFIG_GEODELX_VIDEO_CONSOLE
extern struct video_console geodelx_video_console;
#endif
#ifdef CONFIG_VGA_VIDEO_CONSOLE
extern struct video_console vga_video_console;
#endif
static struct video_console *console_list[] =
{
#ifdef CONFIG_GEODELX_VIDEO_CONSOLE
&geodelx_video_console,
#endif
#ifdef CONFIG_VGA_VIDEO_CONSOLE
&vga_video_console,
#endif
};
static struct video_console *console;
static int cursorx;
static int cursory;
static unsigned int cursor_enabled = 1;
static void video_console_fixup_cursor(void)
{
if (!cursor_enabled)
return;
if (cursorx < 0)
cursorx = 0;
if (cursory < 0)
cursory = 0;
if (cursorx > VIDEO_COLS) {
cursorx = 0;
cursory++;
}
while(cursory >= VIDEO_ROWS) {
console->scroll_up();
cursory--;
}
if (console && console->set_cursor)
console->set_cursor(cursorx, cursory);
}
void video_console_cursor_enable(int state)
{
if (console && console->enable_cursor)
console->enable_cursor(state);
cursor_enabled = state;
if (cursor_enabled)
video_console_fixup_cursor();
}
void video_console_clear(void)
{
if (console)
console->clear();
cursorx = 0;
cursory = 0;
if (console && console->set_cursor)
console->set_cursor(cursorx, cursory);
}
void video_console_putc(u8 row, u8 col, unsigned int ch)
{
if (console)
console->putc(row, col, ch);
}
void video_console_putchar(unsigned int ch)
{
/* replace black-on-black with light-gray-on-black.
do it here, instead of in libc/console.c */
if ((ch & 0xFF00) == 0) {
ch |= 0x0700;
}
switch(ch & 0xFF) {
case '\r':
cursorx = 0;
break;
case '\n':
cursory++;
break;
case '\b':
cursorx--;
if (cursorx < 0) {
cursory--;
cursorx = VIDEO_COLS;
}
break;
case '\t':
while(cursorx % 8 && cursorx < VIDEO_COLS) {
if (console)
console->putc(cursory, cursorx, (ch & 0xFF00) | ' ');
cursorx++;
}
break;
default:
if (console)
console->putc(cursory, cursorx++, ch);
break;
}
video_console_fixup_cursor();
}
void video_console_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en)
{
*x=0;
*y=0;
*en=0;
if (console->get_cursor)
console->get_cursor(x, y, en);
*x = cursorx;
*y = cursory;
}
void video_console_set_cursor(unsigned int x, unsigned int y)
{
cursorx = x;
cursory = y;
video_console_fixup_cursor();
}
static struct console_output_driver cons = {
.putchar = video_console_putchar
};
int video_console_init(void)
{
int i;
for(i = 0; i < ARRAY_SIZE(console_list); i++) {
if (console_list[i]->init())
continue;
console = console_list[i];
if (console->get_cursor)
console->get_cursor((unsigned int*)&cursorx, (unsigned int*)&cursory, &cursor_enabled);
if (cursorx) {
cursorx = 0;
cursory++;
}
video_console_fixup_cursor();
console_add_output_driver(&cons);
return 0;
}
return 0;
}
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