drivers/video/vesa_fb.c

   1 /*
   2  *
   3  * Vesa frame buffer driver for x86
   4  *
   5  * Copyright (C) 2014 Google, Inc
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <pci_rom.h>
  12 #include <video_fb.h>
  13 #include <vbe.h>
  14
  15 /*
  16  * The Graphic Device
  17  */
  18 GraphicDevice ctfb;
  19
  20 /* Devices to allow - only the last one works fully */
  21 struct pci_device_id vesa_video_ids[] = {
  22         { .vendor = 0x102b, .device = 0x0525 },
  23         { .vendor = 0x1002, .device = 0x5159 },
  24         { .vendor = 0x1002, .device = 0x4752 },
  25         { .vendor = 0x1002, .device = 0x5452 },
  26         { .vendor = 0x8086, .device = 0x0f31 },
  27         {},
  28 };
  29
  30 void *video_hw_init(void)
  31 {
  32         GraphicDevice *gdev = &ctfb;
  33         int bits_per_pixel;
  34         pci_dev_t dev;
  35         int ret;
  36
  37         printf("Video: ");
  38         if (vbe_get_video_info(gdev)) {
  39                 /* TODO: Should we look these up by class? */
  40                 dev = pci_find_devices(vesa_video_ids, 0);
  41                 if (dev == -1) {
  42                         printf("no card detected\n");
  43                         return NULL;
  44                 }
  45                 ret = pci_run_vga_bios(dev, NULL, PCI_ROM_USE_NATIVE |
  46                                        PCI_ROM_ALLOW_FALLBACK);
  47                 if (ret) {
  48                         printf("failed to run video BIOS: %d\n", ret);
  49                         return NULL;
  50                 }
  51         }
  52
  53         if (vbe_get_video_info(gdev)) {
  54                 printf("No video mode configured\n");
  55                 return NULL;
  56         }
  57
  58         bits_per_pixel = gdev->gdfBytesPP * 8;
  59         sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
  60                 bits_per_pixel);
  61         printf("%s\n", gdev->modeIdent);
  62         debug("Frame buffer at %x\n", gdev->pciBase);
  63
  64         return (void *)gdev;
  65 }