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u-boot/drivers/pci/pci_rom.c
Bin Meng 1916ec1267 x86: Set up video framebuffer for coreboot before loading kernel 
Currenlty we only set up video framebuffer when VIDEO_VESA driver is
used. With coreboot, VIDEO_COREBOOT driver is used instead. Since we
already saved VESA mode in the VIDEO_COREBOOT driver, now we can also
set up video framebuffer for coreboot before loading Linux kernel.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2015-08-26 07:54:09 -07:00

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/*
* Copyright (C) 2014 Google, Inc
*
* From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
*
* Modifications are:
* Copyright (C) 2003-2004 Linux Networx
* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
* Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com>
* Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
* Copyright (C) 2005-2006 Tyan
* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
* Copyright (C) 2005-2009 coresystems GmbH
* (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
*
* PCI Bus Services, see include/linux/pci.h for further explanation.
*
* Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
* David Mosberger-Tang
*
* Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <bios_emul.h>
#include <errno.h>
#include <malloc.h>
#include <pci.h>
#include <pci_rom.h>
#include <vbe.h>
#include <video_fb.h>
#include <linux/screen_info.h>
#ifdef CONFIG_HAVE_ACPI_RESUME
#include <asm/acpi.h>
#endif
__weak bool board_should_run_oprom(pci_dev_t dev)
{
return true;
}
static bool should_load_oprom(pci_dev_t dev)
{
#ifdef CONFIG_HAVE_ACPI_RESUME
if (acpi_get_slp_type() == 3)
return false;
#endif
if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM))
return 1;
if (board_should_run_oprom(dev))
return 1;
return 0;
}
__weak uint32_t board_map_oprom_vendev(uint32_t vendev)
{
return vendev;
}
static int pci_rom_probe(pci_dev_t dev, uint class,
struct pci_rom_header **hdrp)
{
struct pci_rom_header *rom_header;
struct pci_rom_data *rom_data;
u16 vendor, device;
u16 rom_vendor, rom_device;
u32 rom_class;
u32 vendev;
u32 mapped_vendev;
u32 rom_address;
pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
pci_read_config_word(dev, PCI_DEVICE_ID, &device);
vendev = vendor << 16 | device;
mapped_vendev = board_map_oprom_vendev(vendev);
if (vendev != mapped_vendev)
debug("Device ID mapped to %#08x\n", mapped_vendev);
#ifdef CONFIG_VGA_BIOS_ADDR
rom_address = CONFIG_VGA_BIOS_ADDR;
#else
pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_address);
if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
debug("%s: rom_address=%x\n", __func__, rom_address);
return -ENOENT;
}
/* Enable expansion ROM address decoding. */
pci_write_config_dword(dev, PCI_ROM_ADDRESS,
rom_address | PCI_ROM_ADDRESS_ENABLE);
#endif
debug("Option ROM address %x\n", rom_address);
rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
le16_to_cpu(rom_header->signature),
rom_header->size * 512, le16_to_cpu(rom_header->data));
if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
printf("Incorrect expansion ROM header signature %04x\n",
le16_to_cpu(rom_header->signature));
#ifndef CONFIG_VGA_BIOS_ADDR
/* Disable expansion ROM address decoding */
pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_address);
#endif
return -EINVAL;
}
rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
rom_vendor = le16_to_cpu(rom_data->vendor);
rom_device = le16_to_cpu(rom_data->device);
debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
rom_vendor, rom_device);
/* If the device id is mapped, a mismatch is expected */
if ((vendor != rom_vendor || device != rom_device) &&
(vendev == mapped_vendev)) {
printf("ID mismatch: vendor ID %04x, device ID %04x\n",
rom_vendor, rom_device);
/* Continue anyway */
}
rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
rom_class, rom_data->type);
if (class != rom_class) {
debug("Class Code mismatch ROM %06x, dev %06x\n",
rom_class, class);
}
*hdrp = rom_header;
return 0;
}
int pci_rom_load(struct pci_rom_header *rom_header,
struct pci_rom_header **ram_headerp)
{
struct pci_rom_data *rom_data;
unsigned int rom_size;
unsigned int image_size = 0;
void *target;
do {
/* Get next image, until we see an x86 version */
rom_header = (struct pci_rom_header *)((void *)rom_header +
image_size);
rom_data = (struct pci_rom_data *)((void *)rom_header +
le16_to_cpu(rom_header->data));
image_size = le16_to_cpu(rom_data->ilen) * 512;
} while ((rom_data->type != 0) && (rom_data->indicator == 0));
if (rom_data->type != 0)
return -EACCES;
rom_size = rom_header->size * 512;
#ifdef PCI_VGA_RAM_IMAGE_START
target = (void *)PCI_VGA_RAM_IMAGE_START;
#else
target = (void *)malloc(rom_size);
if (!target)
return -ENOMEM;
#endif
if (target != rom_header) {
ulong start = get_timer(0);
debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
rom_header, target, rom_size);
memcpy(target, rom_header, rom_size);
if (memcmp(target, rom_header, rom_size)) {
printf("VGA ROM copy failed\n");
return -EFAULT;
}
debug("Copy took %lums\n", get_timer(start));
}
*ram_headerp = target;
return 0;
}
struct vbe_mode_info mode_info;
int vbe_get_video_info(struct graphic_device *gdev)
{
#ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
struct vesa_mode_info *vesa = &mode_info.vesa;
gdev->winSizeX = vesa->x_resolution;
gdev->winSizeY = vesa->y_resolution;
gdev->plnSizeX = vesa->x_resolution;
gdev->plnSizeY = vesa->y_resolution;
gdev->gdfBytesPP = vesa->bits_per_pixel / 8;
switch (vesa->bits_per_pixel) {
case 32:
case 24:
gdev->gdfIndex = GDF_32BIT_X888RGB;
break;
case 16:
gdev->gdfIndex = GDF_16BIT_565RGB;
break;
default:
gdev->gdfIndex = GDF__8BIT_INDEX;
break;
}
gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
gdev->pciBase = vesa->phys_base_ptr;
gdev->frameAdrs = vesa->phys_base_ptr;
gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution;
gdev->vprBase = vesa->phys_base_ptr;
gdev->cprBase = vesa->phys_base_ptr;
return gdev->winSizeX ? 0 : -ENOSYS;
#else
return -ENOSYS;
#endif
}
void setup_video(struct screen_info *screen_info)
{
struct vesa_mode_info *vesa = &mode_info.vesa;
/* Sanity test on VESA parameters */
if (!vesa->x_resolution || !vesa->y_resolution)
return;
screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
screen_info->lfb_width = vesa->x_resolution;
screen_info->lfb_height = vesa->y_resolution;
screen_info->lfb_depth = vesa->bits_per_pixel;
screen_info->lfb_linelength = vesa->bytes_per_scanline;
screen_info->lfb_base = vesa->phys_base_ptr;
screen_info->lfb_size =
ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
65536);
screen_info->lfb_size >>= 16;
screen_info->red_size = vesa->red_mask_size;
screen_info->red_pos = vesa->red_mask_pos;
screen_info->green_size = vesa->green_mask_size;
screen_info->green_pos = vesa->green_mask_pos;
screen_info->blue_size = vesa->blue_mask_size;
screen_info->blue_pos = vesa->blue_mask_pos;
screen_info->rsvd_size = vesa->reserved_mask_size;
screen_info->rsvd_pos = vesa->reserved_mask_pos;
}
int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method)
{
struct pci_rom_header *rom, *ram;
int vesa_mode = -1;
uint class;
bool emulate;
int ret;
/* Only execute VGA ROMs */
pci_read_config_dword(dev, PCI_REVISION_ID, &class);
if (((class >> 16) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
debug("%s: Class %#x, should be %#x\n", __func__, class,
PCI_CLASS_DISPLAY_VGA);
return -ENODEV;
}
class >>= 8;
if (!should_load_oprom(dev))
return -ENXIO;
ret = pci_rom_probe(dev, class, &rom);
if (ret)
return ret;
ret = pci_rom_load(rom, &ram);
if (ret)
return ret;
if (!board_should_run_oprom(dev))
return -ENXIO;
#if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
defined(CONFIG_FRAMEBUFFER_VESA_MODE)
vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
#endif
debug("Selected vesa mode %#x\n", vesa_mode);
if (exec_method & PCI_ROM_USE_NATIVE) {
#ifdef CONFIG_X86
emulate = false;
#else
if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
printf("BIOS native execution is only available on x86\n");
return -ENOSYS;
}
emulate = true;
#endif
} else {
#ifdef CONFIG_BIOSEMU
emulate = true;
#else
if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
return -ENOSYS;
}
emulate = false;
#endif
}
if (emulate) {
#ifdef CONFIG_BIOSEMU
BE_VGAInfo *info;
ret = biosemu_setup(dev, &info);
if (ret)
return ret;
biosemu_set_interrupt_handler(0x15, int15_handler);
ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true,
vesa_mode, &mode_info);
if (ret)
return ret;
#endif
} else {
#ifdef CONFIG_X86
bios_set_interrupt_handler(0x15, int15_handler);
bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
&mode_info);
#endif
}
debug("Final vesa mode %#x\n", mode_info.video_mode);
return 0;
}
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