diff options
Diffstat (limited to 'drivers/video/vesa_fb.c')
-rw-r--r-- | drivers/video/vesa_fb.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/video/vesa_fb.c b/drivers/video/vesa_fb.c new file mode 100644 index 0000000..47f824a --- /dev/null +++ b/drivers/video/vesa_fb.c @@ -0,0 +1,67 @@ +/* + * + * Vesa frame buffer driver for x86 + * + * Copyright (C) 2014 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <pci_rom.h> +#include <video_fb.h> +#include <vbe.h> + +/* + * The Graphic Device + */ +GraphicDevice ctfb; + +/* Devices to allow - only the last one works fully */ +struct pci_device_id vesa_video_ids[] = { + { .vendor = 0x102b, .device = 0x0525 }, + { .vendor = 0x1002, .device = 0x5159 }, + { .vendor = 0x1002, .device = 0x4752 }, + { .vendor = 0x1002, .device = 0x5452 }, + { .vendor = 0x8086, .device = 0x0f31 }, + {}, +}; + +void *video_hw_init(void) +{ + GraphicDevice *gdev = &ctfb; + int bits_per_pixel; + pci_dev_t dev; + int ret; + + printf("Video: "); + if (vbe_get_video_info(gdev)) { + /* TODO: Should we look these up by class? */ + dev = pci_find_devices(vesa_video_ids, 0); + if (dev == -1) { + printf("no card detected\n"); + return NULL; + } + bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display"); + ret = pci_run_vga_bios(dev, NULL, PCI_ROM_USE_NATIVE | + PCI_ROM_ALLOW_FALLBACK); + bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD); + if (ret) { + printf("failed to run video BIOS: %d\n", ret); + return NULL; + } + } + + if (vbe_get_video_info(gdev)) { + printf("No video mode configured\n"); + return NULL; + } + + bits_per_pixel = gdev->gdfBytesPP * 8; + sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY, + bits_per_pixel); + printf("%s\n", gdev->modeIdent); + debug("Frame buffer at %x\n", gdev->pciBase); + + return (void *)gdev; +} |