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x86: Add a VESA video driver

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Add a driver intended to cope with any VESA-compatible x86 graphics
adapter. It will not support ROMs which use OpenFirmware (Forth) since
there is no support for that in U-Boot. This means that MAC OS cards
will not work.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-12-29 19:32:28 -07:00
parent c5caba0366
commit 6b1ba98450
3 changed files with 75 additions and 0 deletions
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10
drivers/video/Kconfig
View file

@ -1,3 +1,13 @@
config VIDEO_VESA
bool "Enable VESA video driver support"
depends on X86
default n
help
Turn on this option to enable a very simple driver which uses vesa
to discover the video mode and then provides a frame buffer for use
by U-Boot. This can in principle be used with any platform that
supports PCI and video cards that support VESA BIOS Extension (VBE).
config VIDEO_X86
bool "Enable x86 video driver support"
depends on X86

1
drivers/video/Makefile
View file

@ -44,6 +44,7 @@ obj-$(CONFIG_VIDEO_SMI_LYNXEM) += smiLynxEM.o videomodes.o
obj-$(CONFIG_VIDEO_SUNXI) += sunxi_display.o videomodes.o
obj-$(CONFIG_VIDEO_TEGRA) += tegra.o
obj-$(CONFIG_VIDEO_VCXK) += bus_vcxk.o
obj-$(CONFIG_VIDEO_VESA) += vesa_fb.o
obj-$(CONFIG_VIDEO_X86) += x86_fb.o
obj-$(CONFIG_FORMIKE) += formike.o
obj-$(CONFIG_AM335X_LCD) += am335x-fb.o

64
drivers/video/vesa_fb.c Normal file
View file

@ -0,0 +1,64 @@
/*
*
* 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 },
{},
};
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;
}
printf("bdf %x\n", dev);
ret = pci_run_vga_bios(dev, NULL, true);
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("Framex buffer at %x\n", gdev->pciBase);
return (void *)gdev;
}