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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 <halt.h>
#include <rules.h>
#include <stdlib.h>
#include <soc/gpe.h>
#include <soc/gpio.h>
#include <soc/iomap.h>
#include <soc/lpc.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include <soc/pmc.h>
#include <soc/smbus.h>
#include <timer.h>
#include "chip.h"
/* Print status bits with descriptive names */
static void print_status_bits(u32 status, const char *bit_names[])
{
int i;
if (!status)
return;
for (i = 31; i >= 0; i--) {
if (status & (1 << i)) {
if (bit_names[i])
printk(BIOS_DEBUG, "%s ", bit_names[i]);
else
printk(BIOS_DEBUG, "BIT%d ", i);
}
}
}
/* Print status bits as GPIO numbers */
static void print_gpio_status(u32 status, int start)
{
int i;
if (!status)
return;
for (i = 31; i >= 0; i--) {
if (status & (1 << i))
printk(BIOS_DEBUG, "GPIO%d ", start + i);
}
}
/*
* PM1_CNT
*/
/* Enable events in PM1 control register */
void enable_pm1_control(u32 mask)
{
u32 pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
pm1_cnt |= mask;
outl(pm1_cnt, ACPI_BASE_ADDRESS + PM1_CNT);
}
/* Disable events in PM1 control register */
void disable_pm1_control(u32 mask)
{
u32 pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
pm1_cnt &= ~mask;
outl(pm1_cnt, ACPI_BASE_ADDRESS + PM1_CNT);
}
/*
* PM1
*/
/* Clear and return PM1 status register */
static u16 reset_pm1_status(void)
{
u16 pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS);
outw(pm1_sts, ACPI_BASE_ADDRESS + PM1_STS);
return pm1_sts;
}
/* Print PM1 status bits */
static u16 print_pm1_status(u16 pm1_sts)
{
const char *pm1_sts_bits[] = {
[0] = "TMROF",
[4] = "BM",
[5] = "GBL",
[8] = "PWRBTN",
[10] = "RTC",
[11] = "PRBTNOR",
[14] = "PCIEXPWAK",
[15] = "WAK",
};
if (!pm1_sts)
return 0;
printk(BIOS_SPEW, "PM1_STS: ");
print_status_bits(pm1_sts, pm1_sts_bits);
printk(BIOS_SPEW, "\n");
return pm1_sts;
}
/* Print, clear, and return PM1 status */
u16 clear_pm1_status(void)
{
return print_pm1_status(reset_pm1_status());
}
/* Set the PM1 register to events */
void enable_pm1(u16 events)
{
outw(events, ACPI_BASE_ADDRESS + PM1_EN);
}
/*
* SMI
*/
/* Clear and return SMI status register */
static u32 reset_smi_status(void)
{
u32 smi_sts = inl(ACPI_BASE_ADDRESS + SMI_STS);
outl(smi_sts, ACPI_BASE_ADDRESS + SMI_STS);
return smi_sts;
}
/* Print SMI status bits */
static u32 print_smi_status(u32 smi_sts)
{
const char *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",
};
if (!smi_sts)
return 0;
printk(BIOS_DEBUG, "SMI_STS: ");
print_status_bits(smi_sts, smi_sts_bits);
printk(BIOS_DEBUG, "\n");
return smi_sts;
}
/* Print, clear, and return SMI status */
u32 clear_smi_status(void)
{
return print_smi_status(reset_smi_status());
}
/* Enable SMI event */
void enable_smi(u32 mask)
{
u32 smi_en = inl(ACPI_BASE_ADDRESS + SMI_EN);
smi_en |= mask;
outl(smi_en, ACPI_BASE_ADDRESS + SMI_EN);
}
/* Disable SMI event */
void disable_smi(u32 mask)
{
u32 smi_en = inl(ACPI_BASE_ADDRESS + SMI_EN);
smi_en &= ~mask;
outl(smi_en, ACPI_BASE_ADDRESS + SMI_EN);
}
/*
* TCO
*/
/* Clear TCO status and return events that are enabled and active */
static u32 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;
}
/* Print TCO status bits */
static u32 print_tco_status(u32 tco_sts)
{
const char *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"
};
if (!tco_sts)
return 0;
printk(BIOS_DEBUG, "TCO_STS: ");
print_status_bits(tco_sts, tco_sts_bits);
printk(BIOS_DEBUG, "\n");
return tco_sts;
}
/* Print, clear, and return TCO status */
u32 clear_tco_status(void)
{
return print_tco_status(reset_tco_status());
}
/* Enable TCO SCI */
void enable_tco_sci(void)
{
/* Clear pending events */
outl(TCOSCI_STS, ACPI_BASE_ADDRESS + GPE0_STS(3));
/* Enable TCO SCI events */
enable_gpe(TCOSCI_EN);
}
/*
* GPE0
*/
/* Clear a GPE0 status and return events that are enabled and active */
static u32 reset_gpe(u16 sts_reg, u16 en_reg)
{
u32 gpe0_sts = inl(ACPI_BASE_ADDRESS + sts_reg);
u32 gpe0_en = inl(ACPI_BASE_ADDRESS + en_reg);
outl(gpe0_sts, ACPI_BASE_ADDRESS + sts_reg);
/* Only report enabled events */
return gpe0_sts & gpe0_en;
}
/* Print GPE0 status bits */
static u32 print_gpe_status(u32 gpe0_sts, const char *bit_names[])
{
if (!gpe0_sts)
return 0;
printk(BIOS_DEBUG, "GPE0_STS: ");
print_status_bits(gpe0_sts, bit_names);
printk(BIOS_DEBUG, "\n");
return gpe0_sts;
}
/* Print GPE0 GPIO status bits */
static u32 print_gpe_gpio(u32 gpe0_sts, int start)
{
if (!gpe0_sts)
return 0;
printk(BIOS_DEBUG, "GPE0_STS: ");
print_gpio_status(gpe0_sts, start);
printk(BIOS_DEBUG, "\n");
return gpe0_sts;
}
/* Clear all GPE status and return "standard" GPE event status */
u32 clear_gpe_status(void)
{
const char *gpe0_sts_3_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"
};
print_gpe_gpio(reset_gpe(GPE0_STS(GPE_31_0), GPE0_EN(GPE_31_0)), 0);
print_gpe_gpio(reset_gpe(GPE0_STS(GPE_63_32), GPE0_EN(GPE_63_32)), 32);
print_gpe_gpio(reset_gpe(GPE0_STS(GPE_95_64), GPE0_EN(GPE_95_64)), 64);
return print_gpe_status(reset_gpe(GPE0_STS(GPE_STD), GPE0_EN(GPE_STD)),
gpe0_sts_3_bits);
}
/* Read and clear GPE status (defined in arch/acpi.h) */
int acpi_get_gpe(int gpe)
{
int bank;
uint32_t mask, sts;
struct stopwatch sw;
int rc = 0;
if (gpe < 0 || gpe > GPE0_WADT)
return -1;
bank = gpe / 32;
mask = 1 << (gpe % 32);
/* Wait up to 1ms for GPE status to clear */
stopwatch_init_msecs_expire(&sw, 1);
do {
if (stopwatch_expired(&sw))
return rc;
sts = inl(ACPI_BASE_ADDRESS + GPE0_STS(bank));
if (sts & mask) {
outl(mask, ACPI_BASE_ADDRESS + GPE0_STS(bank));
rc = 1;
}
} while (sts & mask);
return rc;
}
/* Enable all requested GPE */
void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4)
{
outl(set1, ACPI_BASE_ADDRESS + GPE0_EN(GPE_31_0));
outl(set2, ACPI_BASE_ADDRESS + GPE0_EN(GPE_63_32));
outl(set3, ACPI_BASE_ADDRESS + GPE0_EN(GPE_95_64));
outl(set4, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
}
/* Disable all GPE */
void disable_all_gpe(void)
{
enable_all_gpe(0, 0, 0, 0);
}
/* Enable a standard GPE */
void enable_gpe(u32 mask)
{
u32 gpe0_en = inl(ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
gpe0_en |= mask;
outl(gpe0_en, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
}
/* Disable a standard GPE */
void disable_gpe(u32 mask)
{
u32 gpe0_en = inl(ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
gpe0_en &= ~mask;
outl(gpe0_en, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
}
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;
}
void poweroff(void)
{
enable_pm1_control(SLP_EN | (SLP_TYP_S5 << SLP_TYP_SHIFT));
/*
* Setting SLP_TYP_S5 in PM1 triggers SLP_SMI, which is handled by SMM
* to transition to S5 state. If halt is called in SMM, then it prevents
* the SMI handler from being triggered and system never enters S5.
*/
if (!ENV_SMM)
halt();
}
void pmc_gpe_init(void)
{
ROMSTAGE_CONST struct soc_intel_skylake_config *config;
ROMSTAGE_CONST struct device *dev = dev_find_slot(0, PCH_DEVFN_PMC);
uint8_t *pmc_regs;
uint32_t gpio_cfg;
uint32_t gpio_cfg_reg;
const uint32_t gpio_cfg_mask =
(GPE0_DWX_MASK << GPE0_DW0_SHIFT) |
(GPE0_DWX_MASK << GPE0_DW1_SHIFT) |
(GPE0_DWX_MASK << GPE0_DW2_SHIFT);
/* Look up the device in devicetree */
if (!dev || !dev->chip_info) {
printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n");
return;
}
config = dev->chip_info;
pmc_regs = pmc_mmio_regs();
/* Route the GPIOs to the GPE0 block. Determine that all values
* are different, and if they aren't use the reset values. */
gpio_cfg = 0;
if (config->gpe0_dw0 == config->gpe0_dw1 ||
config->gpe0_dw1 == config->gpe0_dw2) {
printk(BIOS_INFO, "PMC: Using default GPE route.\n");
gpio_cfg = read32(pmc_regs + GPIO_CFG);
} else {
gpio_cfg |= (uint32_t)config->gpe0_dw0 << GPE0_DW0_SHIFT;
gpio_cfg |= (uint32_t)config->gpe0_dw1 << GPE0_DW1_SHIFT;
gpio_cfg |= (uint32_t)config->gpe0_dw2 << GPE0_DW2_SHIFT;
}
gpio_cfg_reg = read32(pmc_regs + GPIO_CFG) & ~gpio_cfg_mask;
gpio_cfg_reg |= gpio_cfg & gpio_cfg_mask;
write32(pmc_regs + GPIO_CFG, gpio_cfg_reg);
/* Set the routes in the GPIO communities as well. */
gpio_route_gpe(gpio_cfg_reg >> GPE0_DW0_SHIFT);
/* Set GPE enables based on devictree. */
enable_all_gpe(config->gpe0_en_1, config->gpe0_en_2,
config->gpe0_en_3, config->gpe0_en_4);
}
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