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

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 0000000000..89c146d6ce
--- /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;
+}
+