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-rw-r--r--payloads/libpayload/drivers/video/vga.c140
-rw-r--r--payloads/libpayload/drivers/video/video.c160
2 files changed, 300 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/video/vga.c b/payloads/libpayload/drivers/video/vga.c
new file mode 100644
index 0000000000..388c7b1ee7
--- /dev/null
+++ b/payloads/libpayload/drivers/video/vga.c
@@ -0,0 +1,140 @@
+/*
+ * 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>
+
+#define VGA_COLOR_WHITE 7
+
+#define CRTC_INDEX 0x3d4
+#define CRTC_DATA 0x3d5
+
+#define VIDEO(_r, _c)\
+ ((u16 *) (0xB8000 + ((_r) * (VIDEO_COLS * 2)) + ((_c) * 2)))
+
+static u8 crtc_read(u8 index)
+{
+ outb(index, CRTC_INDEX);
+ return inb(CRTC_DATA);
+}
+
+static void crtc_write(u8 data, u8 index)
+{
+ outb(index, CRTC_INDEX);
+ outb(data, CRTC_DATA);
+}
+
+static void vga_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en)
+{
+ unsigned int addr;
+ addr = ((unsigned int) crtc_read(0x0E)) << 8;
+ addr += crtc_read(0x0E);
+
+ *x = addr % VIDEO_COLS;
+ *y = addr / VIDEO_COLS;
+
+ *en = !(crtc_read(0x0A) & (1 << 5));
+}
+
+static void vga_set_cursor(unsigned int x, unsigned int y)
+{
+ unsigned int addr;
+
+ addr = x + (VIDEO_COLS * y);
+ crtc_write(addr >> 8, 0x0E);
+ crtc_write(addr, 0x0E);
+}
+
+static void vga_enable_cursor(int state)
+{
+ unsigned char tmp = crtc_read(0x0a);
+
+ if (state == 0)
+ tmp |= (1 << 5);
+
+ else
+ tmp &= ~(1 << 5);
+
+ crtc_write(tmp, 0x0a);
+}
+
+static void vga_clear_line(u8 row, u8 ch, u8 attr)
+{
+ int col;
+ u16 *ptr = VIDEO(0, row);
+
+ for(col = 0; col < VIDEO_COLS; col++)
+ ptr[col] = ((attr & 0xFF) << 8) | (ch & 0xFF);
+}
+
+static void vga_scroll_up(void)
+{
+ u16 *src = VIDEO(0,1);
+ u16 *dst = VIDEO(0,0);
+ int i;
+
+ for(i = 0; i < (VIDEO_ROWS - 1) * VIDEO_COLS; i++)
+ *dst++ = *src++;
+
+ vga_clear_line(VIDEO_ROWS - 1, ' ', VGA_COLOR_WHITE);
+}
+
+static void vga_fill(u8 ch, u8 attr)
+{
+ u8 row;
+ for(row = 0; row < VIDEO_ROWS; row++)
+ vga_clear_line(row, ch, attr);
+}
+
+static void vga_clear(void)
+{
+ vga_fill(' ', VGA_COLOR_WHITE);
+}
+
+static void vga_putc(u8 row, u8 col, unsigned int c)
+{
+ u16 *ptr = VIDEO(row, col);
+ *ptr = (u16) (c & 0xFFFF);
+}
+
+static int vga_init(void)
+{
+ return 0;
+}
+
+struct video_console vga_video_console = {
+ .init = vga_init,
+ .putc = vga_putc,
+ .clear = vga_clear,
+ .scroll_up = vga_scroll_up,
+
+ .get_cursor = vga_get_cursor,
+ .set_cursor = vga_set_cursor,
+ .enable_cursor = vga_enable_cursor,
+};
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;
+}
+