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x86: video: Add coreboot framebuffer support

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Add a basic driver for the coreboot framebuffer.

Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stefan Reinauer 2012-11-30 06:32:33 +00:00 committed by Simon Glass
parent 893db5956e
commit 17c40ad963
2 changed files with 102 additions and 0 deletions
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1
drivers/video/Makefile
View File

@ -39,6 +39,7 @@ COBJS-$(CONFIG_S6E8AX0) += s6e8ax0.o
COBJS-$(CONFIG_S6E63D6) += s6e63d6.o
COBJS-$(CONFIG_SED156X) += sed156x.o
COBJS-$(CONFIG_VIDEO_AMBA) += amba.o
COBJS-$(CONFIG_VIDEO_COREBOOT) += coreboot_fb.o
COBJS-$(CONFIG_VIDEO_CT69000) += ct69000.o videomodes.o
COBJS-$(CONFIG_VIDEO_DA8XX) += da8xx-fb.o videomodes.o
COBJS-$(CONFIG_VIDEO_MB862xx) += mb862xx.o videomodes.o

101
drivers/video/coreboot_fb.c Normal file
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@ -0,0 +1,101 @@
/*
* coreboot Framebuffer driver.
*
* Copyright (C) 2011 The Chromium OS authors
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/arch/tables.h>
#include <asm/arch/sysinfo.h>
#include <video_fb.h>
#include "videomodes.h"
/*
* The Graphic Device
*/
GraphicDevice ctfb;
static int parse_coreboot_table_fb(GraphicDevice *gdev)
{
struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
/* If there is no framebuffer structure, bail out and keep
* running on the serial console.
*/
if (!fb)
return 0;
gdev->winSizeX = fb->x_resolution;
gdev->winSizeY = fb->y_resolution;
gdev->plnSizeX = fb->x_resolution;
gdev->plnSizeY = fb->y_resolution;
gdev->gdfBytesPP = fb->bits_per_pixel / 8;
switch (fb->bits_per_pixel) {
case 24:
gdev->gdfIndex = GDF_32BIT_X888RGB;
break;
case 16:
gdev->gdfIndex = GDF_16BIT_565RGB;
break;
default:
gdev->gdfIndex = GDF__8BIT_INDEX;
break;
}
gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
gdev->pciBase = (unsigned int)fb->physical_address;
gdev->frameAdrs = (unsigned int)fb->physical_address;
gdev->memSize = fb->bytes_per_line * fb->y_resolution;
gdev->vprBase = (unsigned int)fb->physical_address;
gdev->cprBase = (unsigned int)fb->physical_address;
return 1;
}
void *video_hw_init(void)
{
GraphicDevice *gdev = &ctfb;
int bits_per_pixel;
printf("Video: ");
if (!parse_coreboot_table_fb(gdev)) {
printf("No video mode configured in coreboot!\n");
return NULL;
}
bits_per_pixel = gdev->gdfBytesPP * 8;
/* fill in Graphic device struct */
sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
bits_per_pixel);
printf("%s\n", gdev->modeIdent);
memset((void *)gdev->pciBase, 0,
gdev->winSizeX * gdev->winSizeY * gdev->gdfBytesPP);
return (void *)gdev;
}