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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.
*/
/*
* Helper functions for dealing with power management registers
* and the differences between PCH variants.
*/
#define __SIMPLE_DEVICE__
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <console/console.h>
#include <intelblocks/pmclib.h>
#include <halt.h>
#include <intelblocks/lpc_lib.h>
#include <rules.h>
#include <stdlib.h>
#include <soc/gpe.h>
#include <soc/gpio.h>
#include <soc/iomap.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include <soc/pmc.h>
#include <soc/smbus.h>
#include <timer.h>
#include <vboot/vbnv.h>
#include "chip.h"
/*
* SMI
*/
const char *const *soc_smi_sts_array(size_t *smi_arr)
{
static const char *const smi_sts_bits[] = {
[2] = "BIOS",
[3] = "LEGACY_USB",
[4] = "SLP_SMI",
[5] = "APM",
[6] = "SWSMI_TMR",
[8] = "PM1",
[9] = "GPE0",
[10] = "GPI",
[11] = "MCSMI",
[12] = "DEVMON",
[13] = "TCO",
[14] = "PERIODIC",
[15] = "SERIRQ_SMI",
[16] = "SMBUS_SMI",
[17] = "LEGACY_USB2",
[18] = "INTEL_USB2",
[20] = "PCI_EXP_SMI",
[21] = "MONITOR",
[26] = "SPI",
[27] = "GPIO_UNLOCK",
[28] = "ESPI_SMI",
};
*smi_arr = ARRAY_SIZE(smi_sts_bits);
return smi_sts_bits;
}
/*
* TCO
*/
const char *const *soc_tco_sts_array(size_t *tco_arr)
{
static const char *const tco_sts_bits[] = {
[0] = "NMI2SMI",
[1] = "SW_TCO",
[2] = "TCO_INT",
[3] = "TIMEOUT",
[7] = "NEWCENTURY",
[8] = "BIOSWR",
[9] = "DMISCI",
[10] = "DMISMI",
[12] = "DMISERR",
[13] = "SLVSEL",
[16] = "INTRD_DET",
[17] = "SECOND_TO",
[18] = "BOOT",
[20] = "SMLINK_SLV"
};
*tco_arr = ARRAY_SIZE(tco_sts_bits);
return tco_sts_bits;
}
/*
* GPE0
*/
const char *const *soc_std_gpe_sts_array(size_t *gpe_arr)
{
static const char *const gpe_sts_bits[] = {
[1] = "HOTPLUG",
[2] = "SWGPE",
[6] = "TCO_SCI",
[7] = "SMB_WAK",
[9] = "PCI_EXP",
[10] = "BATLOW",
[11] = "PME",
[12] = "ME",
[13] = "PME_B0",
[14] = "eSPI",
[15] = "GPIO Tier-2",
[16] = "LAN_WAKE",
[18] = "WADT"
};
*gpe_arr = ARRAY_SIZE(gpe_sts_bits);
return gpe_sts_bits;
}
int acpi_sci_irq(void)
{
int scis = pci_read_config32(PCH_DEV_PMC, ACTL) & SCI_IRQ_SEL;
int sci_irq = 9;
/* Determine how SCI is routed. */
switch (scis) {
case SCIS_IRQ9:
case SCIS_IRQ10:
case SCIS_IRQ11:
sci_irq = scis - SCIS_IRQ9 + 9;
break;
case SCIS_IRQ20:
case SCIS_IRQ21:
case SCIS_IRQ22:
case SCIS_IRQ23:
sci_irq = scis - SCIS_IRQ20 + 20;
break;
default:
printk(BIOS_DEBUG, "Invalid SCI route! Defaulting to IRQ9.\n");
sci_irq = 9;
break;
}
printk(BIOS_DEBUG, "SCI is IRQ%d\n", sci_irq);
return sci_irq;
}
uint8_t *pmc_mmio_regs(void)
{
uint32_t reg32;
reg32 = pci_read_config32(PCH_DEV_PMC, PWRMBASE);
/* 4KiB alignment. */
reg32 &= ~0xfff;
return (void *)(uintptr_t) reg32;
}
uint16_t smbus_tco_regs(void)
{
uint16_t reg16;
reg16 = pci_read_config16(PCH_DEV_SMBUS, TCOBASE);
reg16 &= ~0x1f;
return reg16;
}
uint32_t soc_reset_tco_status(void)
{
u16 tco1_sts;
u16 tco2_sts;
u16 tcobase;
tcobase = smbus_tco_regs();
/* TCO Status 2 register */
tco2_sts = inw(tcobase + TCO2_STS);
tco2_sts |= (TCO2_STS_SECOND_TO | TCO2_STS_BOOT);
outw(tco2_sts, tcobase + TCO2_STS);
/* TCO Status 1 register */
tco1_sts = inw(tcobase + TCO1_STS);
/* Clear SECOND_TO_STS bit */
if (tco2_sts & TCO2_STS_SECOND_TO)
outw(tco2_sts & ~TCO2_STS_SECOND_TO, tcobase + TCO2_STS);
return (tco2_sts << 16) | tco1_sts;
}
uintptr_t soc_read_pmc_base(void)
{
return (uintptr_t) (pmc_mmio_regs());
}
void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
{
DEVTREE_CONST struct soc_intel_skylake_config *config;
/* Look up the device in devicetree */
DEVTREE_CONST struct device *dev = dev_find_slot(0, PCH_DEVFN_PMC);
if (!dev || !dev->chip_info) {
printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n");
return;
}
config = dev->chip_info;
/* Assign to out variable */
*dw0 = config->gpe0_dw0;
*dw1 = config->gpe0_dw1;
*dw2 = config->gpe0_dw2;
}
int rtc_failure(void)
{
u8 reg8;
int rtc_failed;
/* PMC Controller Device 0x1F, Func 02 */
device_t dev = PCH_DEV_PMC;
reg8 = pci_read_config8(dev, GEN_PMCON_B);
rtc_failed = reg8 & RTC_BATTERY_DEAD;
if (rtc_failed) {
reg8 &= ~RTC_BATTERY_DEAD;
pci_write_config8(dev, GEN_PMCON_B, reg8);
printk(BIOS_DEBUG, "rtc_failed = 0x%x\n", rtc_failed);
}
return !!rtc_failed;
}
int vbnv_cmos_failed(void)
{
return rtc_failure();
}
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