| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| /* |
| * This file is created based on Intel Tiger Lake Processor PCH Datasheet |
| * Document number: 575857 |
| * Chapter number: 4, 29 |
| */ |
| |
| #include <arch/io.h> |
| #include <device/mmio.h> |
| #include <bootstate.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 <intelblocks/tco.h> |
| #include <intelblocks/thermal.h> |
| #include <spi-generic.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/soc_chip.h> |
| #include <soc/systemagent.h> |
| |
| static void pch_finalize(void) |
| { |
| uint32_t reg32; |
| uint8_t *pmcbase; |
| config_t *config; |
| uint8_t reg8; |
| |
| /* TCO Lock down */ |
| tco_lockdown(); |
| |
| /* TODO: Add Thermal Configuration */ |
| |
| /* |
| * 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 |
| * |
| * SA_DEV_ROOT device is used here instead of PCH_DEV_PMC since it is |
| * just required to get to chip config. PCH_DEV_PMC is hidden by this |
| * point and hence removed from the root bus. pcidev_path_on_root thus |
| * returns NULL for PCH_DEV_PMC device. |
| */ |
| config = config_of_soc(); |
| pmcbase = pmc_mmio_regs(); |
| 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 + CPPMVRIC); |
| reg32 |= XTALSDQDIS; |
| write32(pmcbase + CPPMVRIC, reg32); |
| } |
| |
| pmc_clear_pmcon_sts(); |
| } |
| |
| static void tbt_finalize(void) |
| { |
| int i; |
| const struct device *dev; |
| |
| /* Disable Thunderbolt PCIe root ports bus master */ |
| for (i = 0; i < NUM_TBT_FUNCTIONS; i++) { |
| dev = pcidev_path_on_root(SA_DEVFN_TBT(i)); |
| if (dev) |
| pci_dev_disable_bus_master(dev); |
| } |
| } |
| |
| static void soc_finalize(void *unused) |
| { |
| printk(BIOS_DEBUG, "Finalizing chipset.\n"); |
| |
| pch_finalize(); |
| apm_control(APM_CNT_FINALIZE); |
| tbt_finalize(); |
| |
| /* 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); |