git.sur5r.net Git - u-boot/blob - drivers/video/vesa_fb.c

   1 /*
   2  * VESA frame buffer driver
   3  *
   4  * Copyright (C) 2014 Google, Inc
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <pci_rom.h>
  11 #include <video_fb.h>
  12 #include <vbe.h>
  13
  14 /*
  15  * The Graphic Device
  16  */
  17 GraphicDevice ctfb;
  18
  19 void *video_hw_init(void)
  20 {
  21         GraphicDevice *gdev = &ctfb;
  22         int bits_per_pixel;
  23         pci_dev_t dev;
  24         int ret;
  25
  26         printf("Video: ");
  27         if (vbe_get_video_info(gdev)) {
  28                 dev = pci_find_class(PCI_CLASS_DISPLAY_VGA << 8, 0);
  29                 if (dev == -1) {
  30                         printf("no card detected\n");
  31                         return NULL;
  32                 }
  33                 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
  34                 ret = pci_run_vga_bios(dev, NULL, PCI_ROM_USE_NATIVE |
  35                                        PCI_ROM_ALLOW_FALLBACK);
  36                 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
  37                 if (ret) {
  38                         printf("failed to run video BIOS: %d\n", ret);
  39                         return NULL;
  40                 }
  41         }
  42
  43         if (vbe_get_video_info(gdev)) {
  44                 printf("No video mode configured\n");
  45                 return NULL;
  46         }
  47
  48         bits_per_pixel = gdev->gdfBytesPP * 8;
  49         sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
  50                 bits_per_pixel);
  51         printf("%s\n", gdev->modeIdent);
  52         debug("Frame buffer at %x\n", gdev->pciBase);
  53
  54         return (void *)gdev;
  55 }