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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google Inc.
* Copyright (C) 2015 Intel Corporation.
*
* 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 <arch/io.h>
#include <bootstate.h>
#include <chip.h>
#include <console/console.h>
#include <console/post_codes.h>
#include <cpu/x86/smm.h>
#include <device/pci.h>
#include <intelblocks/lpc_lib.h>
#include <intelblocks/pcr.h>
#include <reg_script.h>
#include <spi-generic.h>
#include <soc/me.h>
#include <soc/p2sb.h>
#include <soc/pci_devs.h>
#include <soc/pcr_ids.h>
#include <soc/pm.h>
#include <soc/smbus.h>
#include <soc/systemagent.h>
#include <stdlib.h>
#define PSF_BASE_ADDRESS 0xA00
#define PCR_PSFX_T0_SHDW_PCIEN 0x1C
#define PCR_PSFX_T0_SHDW_PCIEN_FUNDIS (1 << 8)
static void pch_configure_endpoints(device_t dev, int epmask_id, uint32_t mask)
{
uint32_t reg32;
reg32 = pci_read_config32(dev, PCH_P2SB_EPMASK(epmask_id));
pci_write_config32(dev, PCH_P2SB_EPMASK(epmask_id), reg32 | mask);
}
static void disable_sideband_access(void)
{
device_t dev;
u8 reg8;
uint32_t mask;
dev = PCH_DEV_P2SB;
/*
* Set p2sb PCI offset EPMASK5 C4h [29, 28, 27, 26] to disable Sideband
* access for PCI Root Bridge.
* Set p2sb PCI offset EPMASK5 C4h [17, 16,10, 1] to disable Sideband
* access for MIPI controller.
*/
mask = (1 << 29) | (1 << 28) | (1 << 27) | (1 << 26) | (1 << 17) |
(1 << 16) | (1 << 10) | (1 << 1);
pch_configure_endpoints(dev, 5, mask);
/*
* Set p2sb PCI offset EPMASK7 CCh ports E6, E5 (bits 6, 5)
* to disable Sideband access for XHCI controller.
*/
mask = (1 << 6) | (1 << 5);
pch_configure_endpoints(dev, 7, mask);
/* Set the "Endpoint Mask Lock!", P2SB PCI offset E2h bit[1] to 1. */
reg8 = pci_read_config8(dev, PCH_P2SB_E0 + 2);
pci_write_config8(dev, PCH_P2SB_E0 + 2, reg8 | (1 << 1));
/* hide p2sb device */
pci_write_config8(dev, PCH_P2SB_E0 + 1, 1);
}
static void pch_disable_heci(void)
{
device_t dev = PCH_DEV_P2SB;
/*
* if p2sb device 1f.1 is not present or hidden in devicetree
* p2sb device becomes NULL
*/
if (!dev)
return;
/* unhide p2sb device */
pci_write_config8(dev, PCH_P2SB_E0 + 1, 0);
/* disable heci */
pcr_or32(PID_PSF1, PSF_BASE_ADDRESS + PCR_PSFX_T0_SHDW_PCIEN,
PCR_PSFX_T0_SHDW_PCIEN_FUNDIS);
disable_sideband_access();
}
static void pch_finalize_script(void)
{
device_t dev;
uint32_t reg32;
uint8_t *pmcbase;
config_t *config;
u8 reg8;
/* Display me status before we hide it */
intel_me_status();
dev = PCH_DEV_PMC;
pmcbase = pmc_mmio_regs();
config = dev->chip_info;
/*
* Disable ACPI PM timer based on dt policy
*
* Disabling ACPI PM timer is necessary for XTAL OSC shutdown.
* Disabling ACPI PM timer also switches off TCO
*/
if (config->PmTimerDisabled) {
reg8 = read8(pmcbase + PCH_PWRM_ACPI_TMR_CTL);
reg8 |= (1 << 1);
write8(pmcbase + PCH_PWRM_ACPI_TMR_CTL, reg8);
}
/* Disable XTAL shutdown qualification for low power idle. */
if (config->s0ix_enable) {
reg32 = read32(pmcbase + CIR31C);
reg32 |= XTALSDQDIS;
write32(pmcbase + CIR31C, reg32);
}
/* we should disable Heci1 based on the devicetree policy */
if (config->HeciEnabled == 0)
pch_disable_heci();
}
static void soc_lockdown(void)
{
struct soc_intel_skylake_config *config;
struct device *dev;
u8 reg8;
dev = PCH_DEV_PMC;
/* Check if PMC is enabled, else return */
if (dev == NULL || dev->chip_info == NULL)
return;
config = dev->chip_info;
/* Global SMI Lock */
if (config->LockDownConfigGlobalSmi == 0) {
reg8 = pci_read_config8(dev, GEN_PMCON_A);
reg8 |= SMI_LOCK;
pci_write_config8(dev, GEN_PMCON_A, reg8);
}
}
static void soc_finalize(void *unused)
{
printk(BIOS_DEBUG, "Finalizing chipset.\n");
pch_finalize_script();
soc_lockdown();
printk(BIOS_DEBUG, "Finalizing SMM.\n");
outb(APM_CNT_FINALIZE, APM_CNT);
/* Indicate finalize step with post code */
post_code(POST_OS_BOOT);
}
BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, soc_finalize, NULL);
BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, soc_finalize, NULL);
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