/* 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 */ #include <acpi/acpigen.h> #include <console/console.h> #include <device/mmio.h> #include <device/device.h> #include <drivers/intel/pmc_mux/chip.h> #include <intelblocks/acpi.h> #include <intelblocks/pmc.h> #include <intelblocks/pmclib.h> #include <intelblocks/pmc_ipc.h> #include <intelblocks/rtc.h> #include <soc/lpm.h> #include <soc/pci_devs.h> #include <soc/pm.h> #include <soc/soc_chip.h> #include <bootstate.h> #define PMC_HID "INTC1026" 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_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_read_resources(struct device *dev) { struct resource *res; /* Add the fixed MMIO resource */ mmio_resource_kb(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_fill_ssdt(const struct device *dev) { const char *scope = acpi_device_scope(dev); const char *name = acpi_device_name(dev); if (!scope || !name) return; acpigen_write_scope(scope); acpigen_write_device(name); acpigen_write_name_string("_HID", PMC_HID); acpigen_write_name_string("_DDN", "Intel(R) Tiger Lake IPC Controller"); /* Hide the device so that Windows does not complain on missing driver */ acpigen_write_STA(ACPI_STATUS_DEVICE_HIDDEN_ON); /* * Part of the PCH's reserved 32 MB MMIO range (0xFC800000 - 0xFE7FFFFF). * The PMC gets 0xFE000000 - 0xFE00FFFF. */ acpigen_write_name("_CRS"); acpigen_write_resourcetemplate_header(); acpigen_write_mem32fixed(1, PCH_PWRM_BASE_ADDRESS, PCH_PWRM_BASE_SIZE); acpigen_write_resourcetemplate_footer(); /* Define IPC Write Method */ if (CONFIG(PMC_IPC_ACPI_INTERFACE)) pmc_ipc_acpi_fill_ssdt(); acpigen_pop_len(); /* PMC Device */ acpigen_pop_len(); /* Scope */ if (CONFIG(SOC_INTEL_COMMON_BLOCK_ACPI_PEP)) { const struct soc_pmc_lpm tgl_pmc_lpm = { .num_substates = 8, .num_req_regs = 6, .lpm_ipc_offset = 0x1000, .req_reg_stride = 0x30, .lpm_enable_mask = get_supported_lpm_mask(config_of_soc()), }; generate_acpi_power_engine_with_lpm(&tgl_pmc_lpm); } printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), dev->chip_ops->name, dev_path(dev)); } static void soc_pmc_init(struct device *dev) { /* * pmc_set_acpi_mode() should be delayed until BS_DEV_INIT in order * to ensure the ordering does not break the assumptions that other * drivers make about ACPI mode (e.g. Chrome EC). Since it disables * ACPI mode, other drivers may take different actions based on this * (e.g. Chrome EC will flush any pending hostevent bits). Because * TGL has its PMC device available for device_operations, it can be * done from the "ops->init" callback. */ 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 pm1_enable_pwrbtn_smi(void *unused) { /* Enable power button SMI after BS_DEV_INIT_CHIPS (FSP-S) is done. */ pmc_update_pm1_enable(PWRBTN_EN); } BOOT_STATE_INIT_ENTRY(BS_DEV_INIT_CHIPS, BS_ON_EXIT, pm1_enable_pwrbtn_smi, NULL); /* * `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 = soc_pmc_fill_ssdt, #endif .scan_bus = scan_static_bus, .final = pmc_final, };