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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <types.h>
#include <string.h>
#include <console/console.h>
#include <arch/acpi.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <drivers/intel/gma/intel_bios.h>
#include "gma_opregion.h"
static void *get_intel_vbios(void)
{
/* This should probably be looking at CBFS or we should always
* deploy the VBIOS on Intel systems, even if we don't run it
* in coreboot (e.g. SeaBIOS only scenarios).
*/
u8 *vbios = (u8 *)0xc0000;
optionrom_header_t *oprom = (optionrom_header_t *)vbios;
optionrom_pcir_t *pcir = (optionrom_pcir_t *)(vbios +
oprom->pcir_offset);
printk(BIOS_DEBUG, "GET_VBIOS: %x %x %x %x %x\n",
oprom->signature, pcir->vendor, pcir->classcode[0],
pcir->classcode[1], pcir->classcode[2]);
if ((oprom->signature == OPROM_SIGNATURE) &&
(pcir->vendor == PCI_VENDOR_ID_INTEL) &&
(pcir->classcode[0] == 0x00) &&
(pcir->classcode[1] == 0x00) &&
(pcir->classcode[2] == 0x03))
return (void *)vbios;
return NULL;
}
static enum cb_err init_opregion_vbt(igd_opregion_t *opregion)
{
void *vbios;
vbios = get_intel_vbios();
if (!vbios) {
printk(BIOS_DEBUG, "VBIOS not found.\n");
return CB_ERR;
}
printk(BIOS_DEBUG, " ... VBIOS found at %p\n", vbios);
optionrom_header_t *oprom = (optionrom_header_t *)vbios;
optionrom_vbt_t *vbt = (optionrom_vbt_t *)(vbios +
oprom->vbt_offset);
if (read32(vbt->hdr_signature) != VBT_SIGNATURE) {
printk(BIOS_DEBUG, "VBT not found!\n");
return CB_ERR;
}
memcpy(opregion->header.vbios_version, vbt->coreblock_biosbuild, 4);
memcpy(opregion->vbt.gvd1, vbt, vbt->hdr_vbt_size < 7168 ?
vbt->hdr_vbt_size : 7168);
return CB_SUCCESS;
}
/* Initialize IGD OpRegion, called from ACPI code and OS drivers */
enum cb_err init_igd_opregion(igd_opregion_t *opregion)
{
enum cb_err ret;
memset((void *)opregion, 0, sizeof(igd_opregion_t));
// FIXME if IGD is disabled, we should exit here.
memcpy(&opregion->header.signature, IGD_OPREGION_SIGNATURE,
sizeof(opregion->header.signature));
/* 8kb */
opregion->header.size = sizeof(igd_opregion_t) / 1024;
opregion->header.version = IGD_OPREGION_VERSION;
// FIXME We just assume we're mobile for now
opregion->header.mailboxes = MAILBOXES_MOBILE;
// TODO Initialize Mailbox 1
// TODO Initialize Mailbox 3
opregion->mailbox3.bclp = IGD_BACKLIGHT_BRIGHTNESS;
opregion->mailbox3.pfit = IGD_FIELD_VALID | IGD_PFIT_STRETCH;
opregion->mailbox3.pcft = 0; // should be (IMON << 1) & 0x3e
opregion->mailbox3.cblv = IGD_FIELD_VALID | IGD_INITIAL_BRIGHTNESS;
opregion->mailbox3.bclm[0] = IGD_WORD_FIELD_VALID + 0x0000;
opregion->mailbox3.bclm[1] = IGD_WORD_FIELD_VALID + 0x0a19;
opregion->mailbox3.bclm[2] = IGD_WORD_FIELD_VALID + 0x1433;
opregion->mailbox3.bclm[3] = IGD_WORD_FIELD_VALID + 0x1e4c;
opregion->mailbox3.bclm[4] = IGD_WORD_FIELD_VALID + 0x2866;
opregion->mailbox3.bclm[5] = IGD_WORD_FIELD_VALID + 0x327f;
opregion->mailbox3.bclm[6] = IGD_WORD_FIELD_VALID + 0x3c99;
opregion->mailbox3.bclm[7] = IGD_WORD_FIELD_VALID + 0x46b2;
opregion->mailbox3.bclm[8] = IGD_WORD_FIELD_VALID + 0x50cc;
opregion->mailbox3.bclm[9] = IGD_WORD_FIELD_VALID + 0x5ae5;
opregion->mailbox3.bclm[10] = IGD_WORD_FIELD_VALID + 0x64ff;
ret = init_opregion_vbt(opregion);
if (ret != CB_SUCCESS)
return ret;
/* Write ASLS PCI register and prepare SWSCI register. */
intel_gma_opregion_register((uintptr_t)opregion);
return CB_SUCCESS;
}
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