mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
153e1dda2f
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>
109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
/*
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* coreboot Framebuffer driver.
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*
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* Copyright (C) 2011 The Chromium OS authors
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/arch/tables.h>
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#include <asm/arch/sysinfo.h>
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#include <vbe.h>
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#include <video_fb.h>
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#include "videomodes.h"
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/*
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* The Graphic Device
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*/
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GraphicDevice ctfb;
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static void save_vesa_mode(void)
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{
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struct vesa_mode_info *vesa = &mode_info.vesa;
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struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
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vesa->x_resolution = fb->x_resolution;
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vesa->y_resolution = fb->y_resolution;
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vesa->bits_per_pixel = fb->bits_per_pixel;
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vesa->bytes_per_scanline = fb->bytes_per_line;
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vesa->phys_base_ptr = fb->physical_address;
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vesa->red_mask_size = fb->red_mask_size;
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vesa->red_mask_pos = fb->red_mask_pos;
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vesa->green_mask_size = fb->green_mask_size;
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vesa->green_mask_pos = fb->green_mask_pos;
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vesa->blue_mask_size = fb->blue_mask_size;
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vesa->blue_mask_pos = fb->blue_mask_pos;
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vesa->reserved_mask_size = fb->reserved_mask_size;
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vesa->reserved_mask_pos = fb->reserved_mask_pos;
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}
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static int parse_coreboot_table_fb(GraphicDevice *gdev)
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{
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struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
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/* If there is no framebuffer structure, bail out and keep
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* running on the serial console.
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*/
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if (!fb)
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return 0;
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gdev->winSizeX = fb->x_resolution;
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gdev->winSizeY = fb->y_resolution;
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gdev->plnSizeX = fb->x_resolution;
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gdev->plnSizeY = fb->y_resolution;
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gdev->gdfBytesPP = fb->bits_per_pixel / 8;
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switch (fb->bits_per_pixel) {
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case 24:
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gdev->gdfIndex = GDF_32BIT_X888RGB;
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break;
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case 16:
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gdev->gdfIndex = GDF_16BIT_565RGB;
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break;
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default:
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gdev->gdfIndex = GDF__8BIT_INDEX;
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break;
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}
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gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
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gdev->pciBase = (unsigned int)fb->physical_address;
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gdev->frameAdrs = (unsigned int)fb->physical_address;
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gdev->memSize = fb->bytes_per_line * fb->y_resolution;
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gdev->vprBase = (unsigned int)fb->physical_address;
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gdev->cprBase = (unsigned int)fb->physical_address;
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return 1;
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}
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void *video_hw_init(void)
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{
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GraphicDevice *gdev = &ctfb;
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int bits_per_pixel;
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printf("Video: ");
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if (!parse_coreboot_table_fb(gdev)) {
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printf("No video mode configured in coreboot!\n");
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return NULL;
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}
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bits_per_pixel = gdev->gdfBytesPP * 8;
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/* fill in Graphic device struct */
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sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
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bits_per_pixel);
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printf("%s\n", gdev->modeIdent);
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memset((void *)gdev->pciBase, 0,
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gdev->winSizeX * gdev->winSizeY * gdev->gdfBytesPP);
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/* Initialize vesa_mode_info structure */
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save_vesa_mode();
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return (void *)gdev;
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}
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