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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
* Copyright (C) 2014 Google Inc.
* Copyright (C) 2015-2017 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 <bootstate.h>
#include <console/console.h>
#include <device/mmio.h>
#include <device/device.h>
#include <device/pci_ops.h>
#include <intelblocks/pmc.h>
#include <intelblocks/pmclib.h>
#include <intelblocks/rtc.h>
#include <reg_script.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include "chip.h"
void pmc_set_disb(void)
{
/* Set the DISB after DRAM init */
u32 disb_val;
#if defined(__SIMPLE_DEVICE__)
pci_devfn_t dev = PCH_DEV_PMC;
#else
struct device *dev = PCH_DEV_PMC;
#endif
disb_val = pci_read_config32(dev, GEN_PMCON_A);
disb_val |= DISB;
/* Don't clear bits that are write-1-to-clear */
disb_val &= ~(GBL_RST_STS | MS4V);
pci_write_config32(dev, GEN_PMCON_A, disb_val);
}
#if ENV_RAMSTAGE
/* Fill up PMC resource structure */
int pmc_soc_get_resources(struct pmc_resource_config *cfg)
{
cfg->pwrmbase_offset = PWRMBASE;
cfg->pwrmbase_addr = PCH_PWRM_BASE_ADDRESS;
cfg->pwrmbase_size = PCH_PWRM_BASE_SIZE;
cfg->abase_offset = ABASE;
cfg->abase_addr = ACPI_BASE_ADDRESS;
cfg->abase_size = ACPI_BASE_SIZE;
return 0;
}
static const struct reg_script pch_pmc_misc_init_script[] = {
/* SLP_S4=4s, SLP_S3=50ms, disable SLP_X stretching after SUS loss. */
REG_PCI_RMW16(GEN_PMCON_B,
~(S4MAW_MASK | SLP_S3_MIN_ASST_WDTH_MASK),
S4MAW_4S | SLP_S3_MIN_ASST_WDTH_50MS |
DIS_SLP_X_STRCH_SUS_UP),
/* Enable SCI and clear SLP requests. */
REG_IO_RMW32(ACPI_BASE_ADDRESS + PM1_CNT, ~SLP_TYP, SCI_EN),
REG_SCRIPT_END
};
static const struct reg_script pmc_write1_to_clear_script[] = {
REG_PCI_OR32(GEN_PMCON_A, 0),
REG_PCI_OR32(GEN_PMCON_B, 0),
REG_PCI_OR32(GEN_PMCON_B, 0),
REG_RES_OR32(PWRMBASE, GBLRST_CAUSE0, 0),
REG_RES_OR32(PWRMBASE, GBLRST_CAUSE1, 0),
REG_SCRIPT_END
};
/*
* Set which power state system will be after reapplying
* the power (from G3 State)
*/
static void pmc_set_afterg3(struct device *dev, int s5pwr)
{
uint8_t reg8;
reg8 = pci_read_config8(dev, GEN_PMCON_B);
switch (s5pwr) {
case MAINBOARD_POWER_STATE_OFF:
reg8 |= 1;
break;
case MAINBOARD_POWER_STATE_ON:
reg8 &= ~1;
break;
case MAINBOARD_POWER_STATE_PREVIOUS:
default:
break;
}
pci_write_config8(dev, GEN_PMCON_B, reg8);
}
static void pch_power_options(struct device *dev)
{
const char *state;
const int pwr_on = CONFIG_MAINBOARD_POWER_FAILURE_STATE;
/*
* Which state do we want to goto after g3 (power restored)?
* 0 == S5 Soft Off
* 1 == S0 Full On
* 2 == Keep Previous State
*/
switch (pwr_on) {
case MAINBOARD_POWER_STATE_OFF:
state = "off";
break;
case MAINBOARD_POWER_STATE_ON:
state = "on";
break;
case MAINBOARD_POWER_STATE_PREVIOUS:
state = "state keep";
break;
default:
state = "undefined";
}
pmc_set_afterg3(dev, pwr_on);
printk(BIOS_INFO, "Set power %s after power failure.\n", state);
/* Set up GPE configuration. */
pmc_gpe_init();
}
static void config_deep_sX(uint32_t offset, uint32_t mask, int sx, int enable)
{
uint32_t reg;
uint8_t *pmcbase = pmc_mmio_regs();
printk(BIOS_DEBUG, "%sabling Deep S%c\n",
enable ? "En" : "Dis", sx + '0');
reg = read32(pmcbase + offset);
if (enable)
reg |= mask;
else
reg &= ~mask;
write32(pmcbase + offset, reg);
}
static void config_deep_s5(int on_ac, int on_dc)
{
/* Treat S4 the same as S5. */
config_deep_sX(S4_PWRGATE_POL, S4AC_GATE_SUS, 4, on_ac);
config_deep_sX(S4_PWRGATE_POL, S4DC_GATE_SUS, 4, on_dc);
config_deep_sX(S5_PWRGATE_POL, S5AC_GATE_SUS, 5, on_ac);
config_deep_sX(S5_PWRGATE_POL, S5DC_GATE_SUS, 5, on_dc);
}
static void config_deep_s3(int on_ac, int on_dc)
{
config_deep_sX(S3_PWRGATE_POL, S3AC_GATE_SUS, 3, on_ac);
config_deep_sX(S3_PWRGATE_POL, S3DC_GATE_SUS, 3, on_dc);
}
static void config_deep_sx(uint32_t deepsx_config)
{
uint32_t reg;
uint8_t *pmcbase = pmc_mmio_regs();
reg = read32(pmcbase + DSX_CFG);
reg &= ~DSX_CFG_MASK;
reg |= deepsx_config;
write32(pmcbase + DSX_CFG, reg);
}
void pmc_soc_init(struct device *dev)
{
const config_t *config = config_of(dev);
rtc_init();
/* Initialize power management */
pch_power_options(dev);
/* Note that certain bits may be cleared from running script as
* certain bit fields are write 1 to clear. */
reg_script_run_on_dev(dev, pch_pmc_misc_init_script);
pmc_set_acpi_mode();
config_deep_s3(config->deep_s3_enable_ac, config->deep_s3_enable_dc);
config_deep_s5(config->deep_s5_enable_ac, config->deep_s5_enable_dc);
config_deep_sx(config->deep_sx_config);
/* Clear registers that contain write-1-to-clear bits. */
reg_script_run_on_dev(dev, pmc_write1_to_clear_script);
}
/*
* Set PMC register to know which state system should be after
* power reapplied
*/
void pmc_soc_restore_power_failure(void)
{
pmc_set_afterg3(PCH_DEV_PMC, CONFIG_MAINBOARD_POWER_FAILURE_STATE);
}
static void pm1_enable_pwrbtn_smi(void *unused)
{
/*
* Enable power button SMI only before jumping to payload. This ensures
* that:
* 1. Power button SMI is enabled only after coreboot is done.
* 2. On resume path, power button SMI is not enabled and thus avoids
* any shutdowns because of power button presses due to power button
* press in resume path.
*/
pmc_update_pm1_enable(PWRBTN_EN);
}
BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, pm1_enable_pwrbtn_smi, NULL);
/*
* Check if WAKE# pin is enabled based on DSX_EN_WAKE_PIN setting in
* deep_sx_config. If WAKE# pin is not enabled, then PCI Express Wake Disable
* bit needs to be set in PM1_EN to avoid unnecessary wakes caused by WAKE#
* pin.
*/
static void pm1_handle_wake_pin(void *unused)
{
const config_t *conf = config_of_path(SA_DEVFN_ROOT);
/* If WAKE# pin is enabled, bail out early. */
if (conf->deep_sx_config & DSX_EN_WAKE_PIN)
return;
pmc_update_pm1_enable(PCIEXPWAK_DIS);
}
BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, pm1_handle_wake_pin, NULL);
BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_EXIT, pm1_handle_wake_pin, NULL);
#endif
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