libpayload: Add video console framework
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
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160
payloads/libpayload/drivers/video/video.c
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160
payloads/libpayload/drivers/video/video.c
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/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload.h>
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#include <video_console.h>
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#ifdef CONFIG_VGA_VIDEO_CONSOLE
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extern struct video_console vga_video_console;
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#endif
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static struct video_console *console_list[] =
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{
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#ifdef CONFIG_VGA_VIDEO_CONSOLE
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&vga_video_console,
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#endif
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};
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static struct video_console *console;
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static unsigned int cursorx;
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static unsigned int cursory;
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static unsigned int cursor_enabled = 1;
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static void video_console_fixup_cursor(void)
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{
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if (!cursor_enabled)
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return;
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if (cursorx < 0)
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cursorx = 0;
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if (cursory < 0)
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cursory = 0;
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if (cursorx > VIDEO_COLS) {
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cursorx = 0;
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cursory++;
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}
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while(cursory >= VIDEO_ROWS) {
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console->scroll_up();
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cursory--;
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}
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if (console && console->set_cursor)
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console->set_cursor(cursorx, cursory);
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}
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void video_console_cursor_enable(int state)
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{
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if (console && console->enable_cursor)
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console->enable_cursor(state);
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cursor_enabled = state;
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if (cursor_enabled)
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video_console_fixup_cursor();
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}
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void video_console_clear(void)
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{
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if (console)
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console->clear();
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cursorx = 0;
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cursory = 0;
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if (console && console->set_cursor)
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console->set_cursor(cursorx, cursory);
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}
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void video_console_putc(u8 row, u8 col, unsigned int ch)
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{
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if (console)
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console->putc(row, col, ch);
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}
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void video_console_putchar(unsigned int ch)
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{
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switch(ch & 0xFF) {
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case '\r':
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cursorx = 0;
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break;
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case '\n':
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cursory++;
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break;
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case '\b':
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cursorx--;
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break;
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case '\t':
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while(cursorx % 8 && cursorx < VIDEO_COLS) {
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if (console)
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console->putc(cursorx, cursory, (ch & 0xFF00) | ' ');
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cursorx++;
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}
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break;
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default:
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if (console)
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console->putc(cursorx++, cursory, ch);
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break;
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}
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video_console_fixup_cursor();
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}
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int video_console_init(void)
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{
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int i;
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for(i = 0; i < ARRAY_SIZE(console_list); i++) {
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if (console_list[i]->init())
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continue;
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console = console_list[i];
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if (console->get_cursor)
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console->get_cursor(&cursorx, &cursory, &cursor_enabled);
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if (cursorx) {
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cursorx = 0;
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cursory++;
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}
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video_console_fixup_cursor();
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return 0;
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}
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return 0;
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}
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