libpayload: Add a Geode video driver

Add a Geode video driver in lieu of VGA on Geode LX devices

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@3233 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 290 insertions, 0 deletions

diff --git a/payloads/libpayload/drivers/video/geode.c b/payloads/libpayload/drivers/video/geode.c
new file mode 100644
index 0000000000..230926c99a
--- /dev/null
+++ b/payloads/libpayload/drivers/video/geode.c
@@ -0,0 +1,290 @@
+/*
+ * 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 <pci.h>
+#include <video_console.h>
+#include <arch/io.h>
+#include <arch/msr.h>
+
+#include "font8x16.h"
+
+/* This is the video mode that we're going to use for our VGA screen */
+
+static const struct mode {
+	unsigned int pll;
+	unsigned int hactive, hblankstart, hsyncstart;
+	unsigned int hsyncend, hblankend, htotal;
+	unsigned int vactive, vblankstart, vsyncstart;
+	unsigned int vsyncend, vblankend, vtotal;
+	unsigned int synccfg;
+} vga_mode = {
+	.pll = 0x215D,
+	.hactive = 640,
+	.vactive = 400,
+	.hblankstart = 640,
+	.hsyncstart =  640 + 40,
+	.hsyncend =    640 + 40 + 96,
+	.hblankend =   640 + 40 + 96 + 24,
+	.htotal =      640 + 40 + 96 + 24,
+	.vblankstart = 400,
+	.vsyncstart = 400 + 39,
+	.vsyncend =   400 + 39 + 2,
+	.vblankend =  400 + 39 + 2 + 9,
+	.vtotal =     400 + 39 + 2 + 9,
+	.synccfg = 0x300,
+};
+
+/* These are the color definitions for the 16 standard colors */
+
+static const unsigned int vga_colors[] = {
+	(0x00 << 16) | (0x00 << 8) | 0x00,
+	(0xAA << 16) | (0x00 << 8) | 0x00,
+	(0x00 << 16) | (0xAA << 8) | 0x00,
+	(0xAA << 16) | (0x55 << 8) | 0x00,
+	(0x00 << 16) | (0x00 << 8) | 0xAA,
+	(0xAA << 16) | (0x00 << 8) | 0xAA,
+	(0x00 << 16) | (0xAA << 8) | 0xAA,
+	(0xAA << 16) | (0xAA << 8) | 0xAA,
+	(0x55 << 16) | (0x55 << 8) | 0x55,
+	(0xFF << 16) | (0x55 << 8) | 0x55,
+	(0x55 << 16) | (0xFF << 8) | 0x55,
+	(0xFF << 16) | (0xFF << 8) | 0x55,
+	(0x55 << 16) | (0x55 << 8) | 0xFF,
+	(0xFF << 16) | (0x55 << 8) | 0xFF,
+	(0x55 << 16) | (0xFF << 8) | 0xFF,
+	(0xFF << 16) | (0xFF << 8) | 0xFF,
+};
+
+/* Addresses for the various components */
+
+static unsigned long dcaddr;
+static unsigned long vgaddr;
+static unsigned long gpaddr;
+static unsigned long fbaddr;
+
+#define FB ((unsigned char *) fbaddr)
+
+static void init_video_mode(void)
+{
+	unsigned int lo, hi, val;
+	int i;
+
+	/* Set the PLL */
+
+	rdmsr(0x4c000015, lo, hi);
+
+	hi = vga_mode.pll;
+
+	lo &= ~0x1008000;
+	lo |= 0x01;
+
+	wrmsr(0x4c000015, lo, hi);
+	udelay(100);
+
+	for(i = 0; i < 1000; i++) {
+		rdmsr(0x4c000015, lo, hi);
+		if (lo & 0x2000000)
+			break;
+	}
+
+	lo &= ~0x01;
+	wrmsr(0x4c000015, lo, hi);
+
+	rdmsr(0x48002001, lo, hi);
+	lo &= ~0x38;
+	wrmsr(0x48002001, lo, hi);
+
+	writel(0x4758, dcaddr + 0x00);
+
+	val = readl(dcaddr + 0x00);
+
+	writel(0, dcaddr + 0x10);
+	writel(0, dcaddr + 0x14);
+	writel(0, dcaddr + 0x18);
+
+	/* Set up the default scaling */
+
+	val = readl(dcaddr + 0xD4);
+
+	writel((0x4000 << 16) | 0x4000, dcaddr + 0x90);
+	writel(0, dcaddr + 0x94);
+	writel(val & ~0xf3040000, dcaddr + 0xD4);
+
+	/* Set up the compression (or lack thereof) */
+	writel(vga_mode.hactive * vga_mode.vactive | 0x01, dcaddr + 0x2C);
+
+	val = readl(dcaddr + 0x88);
+	writel(val & ~0xC00, dcaddr + 0x88);
+	writel(0, dcaddr + 0x8C);
+
+	/* Set the pitch */
+	writel(vga_mode.hactive >> 3, dcaddr + 0x34);
+	writel((vga_mode.hactive + 7) >> 3, dcaddr + 0x30);
+
+	/* Set up default watermarks */
+
+	lo = 0xC0;
+	wrmsr(0x80000011, lo, hi);
+
+	/* Write the timings */
+
+	writel((vga_mode.hactive - 1) | ((vga_mode.htotal - 1) << 16),
+	       dcaddr + 0x40);
+
+	writel((vga_mode.hblankstart - 1) | ((vga_mode.hblankend - 1) << 16),
+	       dcaddr + 0x44);
+
+	writel((vga_mode.hsyncstart - 1) | ((vga_mode.hsyncend - 1) << 16),
+	       dcaddr + 0x48);
+
+	writel((vga_mode.vactive - 1) | ((vga_mode.vtotal - 1) << 16),
+	       dcaddr + 0x50);
+
+	writel((vga_mode.vblankstart - 1) | ((vga_mode.vblankend - 1) << 16),
+	       dcaddr + 0x54);
+
+	writel((vga_mode.vsyncstart - 1) | ((vga_mode.vsyncend - 1) << 16),
+	       dcaddr + 0x58);
+
+	writel(((vga_mode.hactive - 1) << 16) | (vga_mode.vactive - 1),
+	       dcaddr + 0x5C);
+
+
+	/* Write the VG configuration */
+
+	writel(0x290000F | vga_mode.synccfg, vgaddr + 0x08);
+
+	/* Turn on the dacs */
+
+	val = readl(vgaddr + 0x50);
+	writel((val & ~0xC00) | 0x01, vgaddr + 0x50);
+
+	/* Set the framebuffer base */
+	writel(fbaddr, dcaddr + 0x84);
+
+	/* Write the final configuration */
+
+	writel(0xB000059, dcaddr + 0x08);
+	writel(0, dcaddr + 0x0C);
+	writel(0x2B601, dcaddr + 0x04);
+}
+
+static void geode_set_palette(int entry, unsigned int color)
+{
+	writel(entry, dcaddr + 0x70);
+	writel(color, dcaddr + 0x74);
+}
+
+static void geode_scroll_up(void)
+{
+	unsigned char *dst = FB;
+	unsigned char *src = FB + vga_mode.hactive;
+	int y;
+
+	for(y = 0; y < vga_mode.vactive - FONT_HEIGHT; y++) {
+		memcpy(dst, src, vga_mode.hactive);
+
+		dst += vga_mode.hactive;
+		src += vga_mode.hactive;
+	}
+
+	dst = FB + (vga_mode.vactive - FONT_HEIGHT) * vga_mode.hactive;
+
+	for(; y < vga_mode.vactive; y++) {
+		memset(dst, 0, vga_mode.hactive);
+		dst += vga_mode.hactive;
+	}
+}
+
+static void geode_clear(void)
+{
+	int row;
+	unsigned char *ptr = FB;
+
+	for(row = 0; row < vga_mode.vactive; row++) {
+		memset(ptr, 0, vga_mode.hactive);
+		ptr += vga_mode.hactive;
+	}
+}
+
+static void geode_putc(u8 row, u8 col, unsigned int ch)
+{
+	unsigned char *dst;
+	unsigned char *glyph = font8x16 + ((ch & 0xFF) * FONT_HEIGHT);
+
+	unsigned char bg = (ch >> 12) & 0xF;
+	unsigned char fg = (ch >> 8) & 0xF;
+
+	int x, y;
+
+	dst = FB + ((row * FONT_HEIGHT) * vga_mode.hactive);
+	dst += (col * FONT_WIDTH);
+
+	for(y = 0; y < FONT_HEIGHT; y++) {
+
+		for(x = FONT_WIDTH - 1; x >= 0; x--)
+			dst[FONT_WIDTH - x] = (*glyph & (1 << x)) ?
+				fg : bg;
+
+		dst += vga_mode.hactive;
+		glyph++;
+	}
+}
+
+static int geode_init(void)
+{
+	pcidev_t dev;
+	int i;
+
+	if (!pci_find_device(0x1022, 0x2081, &dev))
+		return -1;
+
+	fbaddr = pci_read_resource(dev, 0);
+	gpaddr = pci_read_resource(dev, 1);
+	dcaddr = pci_read_resource(dev, 2);
+	vgaddr = pci_read_resource(dev, 3);
+
+	init_video_mode();
+
+	/* Set up the palette */
+
+	for(i = 0; i < ARRAY_SIZE(vga_colors); i++) {
+		geode_set_palette(i, vga_colors[i]);
+	}
+
+	return 0;
+}
+
+struct video_console geode_video_console = {
+	.init = geode_init,
+	.putc = geode_putc,
+	.clear = geode_clear,
+	.scroll_up = geode_scroll_up
+};