mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-21 01:18:52 +09:00
![Bin Meng](/assets/img/avatar_default.png)
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>
110 lines
2.5 KiB
C
110 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;
|
|
}
|