u-boot/drivers/video/coreboot_fb.c
Bin Meng 153e1dda2f video: coreboot: Save VESA mode for future use
When booting as a coreboot payload, the framebuffer details are
passed from coreboot via configuration tables. We save these
information into vesa_mode_info structure for future use.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2015-08-26 07:54:08 -07:00

109 lines
2.5 KiB
C

/*
* coreboot Framebuffer driver.
*
* Copyright (C) 2011 The Chromium OS authors
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/tables.h>
#include <asm/arch/sysinfo.h>
#include <vbe.h>
#include <video_fb.h>
#include "videomodes.h"
/*
* The Graphic Device
*/
GraphicDevice ctfb;
static void save_vesa_mode(void)
{
struct vesa_mode_info *vesa = &mode_info.vesa;
struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
vesa->x_resolution = fb->x_resolution;
vesa->y_resolution = fb->y_resolution;
vesa->bits_per_pixel = fb->bits_per_pixel;
vesa->bytes_per_scanline = fb->bytes_per_line;
vesa->phys_base_ptr = fb->physical_address;
vesa->red_mask_size = fb->red_mask_size;
vesa->red_mask_pos = fb->red_mask_pos;
vesa->green_mask_size = fb->green_mask_size;
vesa->green_mask_pos = fb->green_mask_pos;
vesa->blue_mask_size = fb->blue_mask_size;
vesa->blue_mask_pos = fb->blue_mask_pos;
vesa->reserved_mask_size = fb->reserved_mask_size;
vesa->reserved_mask_pos = fb->reserved_mask_pos;
}
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);
/* Initialize vesa_mode_info structure */
save_vesa_mode();
return (void *)gdev;
}