drivers/video/coreboot_fb.c

   1 /*
   2  * coreboot Framebuffer driver.
   3  *
   4  * Copyright (C) 2011 The Chromium OS authors
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <asm/arch/tables.h>
  11 #include <asm/arch/sysinfo.h>
  12 #include <vbe.h>
  13 #include <video_fb.h>
  14 #include "videomodes.h"
  15
  16 /*
  17  * The Graphic Device
  18  */
  19 GraphicDevice ctfb;
  20
  21 static void save_vesa_mode(void)
  22 {
  23         struct vesa_mode_info *vesa = &mode_info.vesa;
  24         struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
  25
  26         vesa->x_resolution = fb->x_resolution;
  27         vesa->y_resolution = fb->y_resolution;
  28         vesa->bits_per_pixel = fb->bits_per_pixel;
  29         vesa->bytes_per_scanline = fb->bytes_per_line;
  30         vesa->phys_base_ptr = fb->physical_address;
  31         vesa->red_mask_size = fb->red_mask_size;
  32         vesa->red_mask_pos = fb->red_mask_pos;
  33         vesa->green_mask_size = fb->green_mask_size;
  34         vesa->green_mask_pos = fb->green_mask_pos;
  35         vesa->blue_mask_size = fb->blue_mask_size;
  36         vesa->blue_mask_pos = fb->blue_mask_pos;
  37         vesa->reserved_mask_size = fb->reserved_mask_size;
  38         vesa->reserved_mask_pos = fb->reserved_mask_pos;
  39 }
  40
  41 static int parse_coreboot_table_fb(GraphicDevice *gdev)
  42 {
  43         struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
  44
  45         /* If there is no framebuffer structure, bail out and keep
  46          * running on the serial console.
  47          */
  48         if (!fb)
  49                 return 0;
  50
  51         gdev->winSizeX = fb->x_resolution;
  52         gdev->winSizeY = fb->y_resolution;
  53
  54         gdev->plnSizeX = fb->x_resolution;
  55         gdev->plnSizeY = fb->y_resolution;
  56
  57         gdev->gdfBytesPP = fb->bits_per_pixel / 8;
  58
  59         switch (fb->bits_per_pixel) {
  60         case 24:
  61                 gdev->gdfIndex = GDF_32BIT_X888RGB;
  62                 break;
  63         case 16:
  64                 gdev->gdfIndex = GDF_16BIT_565RGB;
  65                 break;
  66         default:
  67                 gdev->gdfIndex = GDF__8BIT_INDEX;
  68                 break;
  69         }
  70
  71         gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
  72         gdev->pciBase = (unsigned int)fb->physical_address;
  73
  74         gdev->frameAdrs = (unsigned int)fb->physical_address;
  75         gdev->memSize = fb->bytes_per_line * fb->y_resolution;
  76
  77         gdev->vprBase = (unsigned int)fb->physical_address;
  78         gdev->cprBase = (unsigned int)fb->physical_address;
  79
  80         return 1;
  81 }
  82
  83 void *video_hw_init(void)
  84 {
  85         GraphicDevice *gdev = &ctfb;
  86         int bits_per_pixel;
  87
  88         printf("Video: ");
  89
  90         if (!parse_coreboot_table_fb(gdev)) {
  91                 printf("No video mode configured in coreboot!\n");
  92                 return NULL;
  93         }
  94
  95         bits_per_pixel = gdev->gdfBytesPP * 8;
  96
  97         /* fill in Graphic device struct */
  98         sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
  99                  bits_per_pixel);
 100         printf("%s\n", gdev->modeIdent);
 101
 102         memset((void *)gdev->pciBase, 0,
 103                 gdev->winSizeX * gdev->winSizeY * gdev->gdfBytesPP);
 104
 105         /* Initialize vesa_mode_info structure */
 106         save_vesa_mode();
 107
 108         return (void *)gdev;
 109 }