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libpayload: Add video console framework

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Add a framework for multiple video console drivers.  This is to prepare
for the Geode driver.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3230 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Jordan Crouse
2008-04-10 22:49:02 +00:00
parent bac89d088c
commit 30939bdffd
10 changed files with 374 additions and 234 deletions
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160
payloads/libpayload/drivers/video/video.c Normal file
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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.h>
#include <video_console.h>
#ifdef CONFIG_VGA_VIDEO_CONSOLE
extern struct video_console vga_video_console;
#endif
static struct video_console *console_list[] =
{
#ifdef CONFIG_VGA_VIDEO_CONSOLE
&vga_video_console,
#endif
};
static struct video_console *console;
static unsigned int cursorx;
static unsigned 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)
{
switch(ch & 0xFF) {
case '\r':
cursorx = 0;
break;
case '\n':
cursory++;
break;
case '\b':
cursorx--;
break;
case '\t':
while(cursorx % 8 && cursorx < VIDEO_COLS) {
if (console)
console->putc(cursorx, cursory, (ch & 0xFF00) | ' ');
cursorx++;
}
break;
default:
if (console)
console->putc(cursorx++, cursory, ch);
break;
}
video_console_fixup_cursor();
}
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(&cursorx, &cursory, &cursor_enabled);
if (cursorx) {
cursorx = 0;
cursory++;
}
video_console_fixup_cursor();
return 0;
}
return 0;
}