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