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author | Jordan Crouse <jordan.crouse@amd.com> | 2008-04-10 22:49:02 +0000 |
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committer | Jordan Crouse <jordan.crouse@amd.com> | 2008-04-10 22:49:02 +0000 |
commit | 30939bdffd0435df4aa0830b2da1ef06ceebfba3 (patch) | |
tree | 12c08ea67c3c6756c7959813a043f075844d09fa /payloads/libpayload/drivers/video/video.c | |
parent | bac89d088cf102851122925b31404b7ae52c21c3 (diff) | |
download | coreboot-30939bdffd0435df4aa0830b2da1ef06ceebfba3.tar.gz coreboot-30939bdffd0435df4aa0830b2da1ef06ceebfba3.tar.bz2 coreboot-30939bdffd0435df4aa0830b2da1ef06ceebfba3.zip |
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
Diffstat (limited to 'payloads/libpayload/drivers/video/video.c')
-rw-r--r-- | payloads/libpayload/drivers/video/video.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/video/video.c b/payloads/libpayload/drivers/video/video.c new file mode 100644 index 000000000000..89c146d6ceb6 --- /dev/null +++ b/payloads/libpayload/drivers/video/video.c @@ -0,0 +1,160 @@ +/* + * 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; +} + |