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/* SPDX-License-Identifier: GPL-2.0-only */
#include <bootstate.h>
#include <console/console.h>
#include <device/mmio.h>
#include <device/device.h>
#include <intelblocks/acpi.h>
#include <intelblocks/pmc.h>
#include <intelblocks/pmclib.h>
#include <intelblocks/rtc.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include "chip.h"
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);
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);
}
static void soc_pmc_read_resources(struct device *dev)
{
struct resource *res;
/* Add the fixed MMIO resource */
mmio_resource(dev, 0, PCH_PWRM_BASE_ADDRESS / KiB, PCH_PWRM_BASE_SIZE / KiB);
/* Add the fixed I/O resource */
res = new_resource(dev, 1);
res->base = (resource_t)ACPI_BASE_ADDRESS;
res->size = (resource_t)ACPI_BASE_SIZE;
res->limit = res->base + res->size - 1;
res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
}
static void soc_pmc_enable(struct device *dev)
{
const config_t *config = config_of_soc();
rtc_init();
pmc_set_power_failure_state(true);
pmc_gpe_init();
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);
}
static void soc_pmc_init(struct device *dev)
{
/*
* PMC initialization happens earlier for this SoC because FSP-Silicon
* init hides PMC from PCI bus. However, pmc_set_acpi_mode, which
* disables ACPI mode doesn't need to happen that early and can be
* delayed till typical BS_DEV_INIT. This ensures that ACPI mode
* disabling happens the same way for all SoCs and hence the ordering of
* events is the same.
*
* This is important to ensure that the ordering does not break the
* assumptions of any other drivers (e.g. ChromeEC) which could be
* taking different actions based on disabling of ACPI (e.g. flushing of
* all EC hostevent bits).
*
* Because the device is set as `hidden` in the devicetree, enumeration
* is skipped, but the device callbacks are still called as if it were
* found.
*/
pmc_set_acpi_mode();
/*
* Disable ACPI PM timer based on Kconfig
*
* Disabling ACPI PM timer is necessary for XTAL OSC shutdown.
* Disabling ACPI PM timer also switches off TCO.
*/
if (!CONFIG(USE_PM_ACPI_TIMER))
setbits8(pmc_mmio_regs() + PCH_PWRM_ACPI_TMR_CTL, ACPI_TIM_DIS);
}
static void pmc_fill_ssdt(const struct device *dev)
{
if (CONFIG(SOC_INTEL_COMMON_BLOCK_ACPI_PEP))
generate_acpi_power_engine();
}
/*
* `pmc_final` function is native implementation of equivalent events performed by
* each FSP NotifyPhase() API invocations.
*
*
* Clear PMCON status bits (Global Reset/Power Failure/Host Reset Status bits)
*
* Perform the PMCON status bit clear operation from `.final`
* to cover any such chances where later boot stage requested a global
* reset and PMCON status bit remains set.
*/
static void pmc_final(struct device *dev)
{
pmc_clear_pmcon_sts();
}
struct device_operations pmc_ops = {
.read_resources = soc_pmc_read_resources,
.set_resources = noop_set_resources,
.init = soc_pmc_init,
.enable = soc_pmc_enable,
#if CONFIG(HAVE_ACPI_TABLES)
.acpi_fill_ssdt = pmc_fill_ssdt,
#endif
.scan_bus = scan_static_bus,
.final = pmc_final,
};
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