coreboot-kgpe-d16/payloads/libpayload/drivers/video/geode.c

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/*
* 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/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 DC (phys_to_virt(dcaddr))
#define VG (phys_to_virt(vgaddr))
#define GP (phys_to_virt(gpaddr))
#define FB ((unsigned char *) phys_to_virt(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, DC + 0x00);
val = readl(DC + 0x00);
writel(0, DC + 0x10);
writel(0, DC + 0x14);
writel(0, DC + 0x18);
/* Set up the default scaling */
val = readl(DC + 0xD4);
writel((0x4000 << 16) | 0x4000, DC + 0x90);
writel(0, DC + 0x94);
writel(val & ~0xf3040000, DC + 0xD4);
/* Set up the compression (or lack thereof) */
writel(vga_mode.hactive * vga_mode.vactive | 0x01, DC + 0x2C);
val = readl(DC + 0x88);
writel(val & ~0xC00, DC + 0x88);
writel(0, DC + 0x8C);
/* Set the pitch */
writel(vga_mode.hactive >> 3, DC + 0x34);
writel((vga_mode.hactive + 7) >> 3, DC + 0x30);
/* Set up default watermarks */
lo = 0xC0;
wrmsr(0x80000011, lo, hi);
/* Write the timings */
writel((vga_mode.hactive - 1) | ((vga_mode.htotal - 1) << 16),
DC + 0x40);
writel((vga_mode.hblankstart - 1) | ((vga_mode.hblankend - 1) << 16),
DC + 0x44);
writel((vga_mode.hsyncstart - 1) | ((vga_mode.hsyncend - 1) << 16),
DC + 0x48);
writel((vga_mode.vactive - 1) | ((vga_mode.vtotal - 1) << 16),
DC + 0x50);
writel((vga_mode.vblankstart - 1) | ((vga_mode.vblankend - 1) << 16),
DC + 0x54);
writel((vga_mode.vsyncstart - 1) | ((vga_mode.vsyncend - 1) << 16),
DC + 0x58);
writel(((vga_mode.hactive - 1) << 16) | (vga_mode.vactive - 1),
DC + 0x5C);
/* Write the VG configuration */
writel(0x290000F | vga_mode.synccfg, VG + 0x08);
/* Turn on the dacs */
val = readl(VG + 0x50);
writel((val & ~0xC00) | 0x01, VG + 0x50);
/* Set the framebuffer base */
writel(fbaddr, DC + 0x84);
/* Write the final configuration */
writel(0xB000059, DC + 0x08);
writel(0, DC + 0x0C);
writel(0x2B601, DC + 0x04);
}
static void geode_set_palette(int entry, unsigned int color)
{
writel(entry, DC + 0x70);
writel(color, DC + 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
};