/* SPDX-License-Identifier: GPL-2.0-only */ /* * Helper functions for dealing with power management registers * and the differences between PCH variants. */ /* * This file is created based on Intel Tiger Lake Processor PCH Datasheet * Document number: 575857 * Chapter number: 4 */ #define __SIMPLE_DEVICE__ #include <acpi/acpi_pm.h> #include <console/console.h> #include <device/mmio.h> #include <device/device.h> #include <device/pci.h> #include <gpio.h> #include <intelblocks/pmclib.h> #include <intelblocks/rtc.h> #include <intelblocks/tco.h> #include <intelpch/espi.h> #include <soc/gpe.h> #include <soc/iomap.h> #include <soc/pci_devs.h> #include <soc/pm.h> #include <soc/smbus.h> #include <soc/soc_chip.h> #include <security/vboot/vbnv.h> /* * SMI */ const char *const *soc_smi_sts_array(size_t *a) { static const char *const smi_sts_bits[] = { [BIOS_STS_BIT] = "BIOS", [LEGACY_USB_STS_BIT] = "LEGACY_USB", [SMI_ON_SLP_EN_STS_BIT] = "SLP_SMI", [APM_STS_BIT] = "APM", [SWSMI_TMR_STS_BIT] = "SWSMI_TMR", [PM1_STS_BIT] = "PM1", [GPE0_STS_BIT] = "GPE0", [GPIO_STS_BIT] = "GPI", [MCSMI_STS_BIT] = "MCSMI", [DEVMON_STS_BIT] = "DEVMON", [TCO_STS_BIT] = "TCO", [PERIODIC_STS_BIT] = "PERIODIC", [SERIRQ_SMI_STS_BIT] = "SERIRQ_SMI", [SMBUS_SMI_STS_BIT] = "SMBUS_SMI", [PCI_EXP_SMI_STS_BIT] = "PCI_EXP_SMI", [MONITOR_STS_BIT] = "MONITOR", [SPI_SMI_STS_BIT] = "SPI", [GPIO_UNLOCK_SMI_STS_BIT] = "GPIO_UNLOCK", [ESPI_SMI_STS_BIT] = "ESPI_SMI", }; *a = ARRAY_SIZE(smi_sts_bits); return smi_sts_bits; } /* * TCO */ const char *const *soc_tco_sts_array(size_t *a) { static const char *const 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" }; *a = ARRAY_SIZE(tco_sts_bits); return tco_sts_bits; } /* * GPE0 */ const char *const *soc_std_gpe_sts_array(size_t *a) { static const char *const gpe_sts_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" }; *a = ARRAY_SIZE(gpe_sts_bits); return gpe_sts_bits; } void pmc_set_disb(void) { /* Set the DISB after DRAM init */ uint8_t disb_val; /* Only care about bits [23:16] of register GEN_PMCON_A */ uint8_t *addr = (uint8_t *)(pmc_mmio_regs() + GEN_PMCON_A + 2); disb_val = read8(addr); disb_val |= (DISB >> 16); /* Don't clear bits that are write-1-to-clear */ disb_val &= ~((MS4V | SUS_PWR_FLR) >> 16); write8(addr, disb_val); } /* * PMC controller gets hidden from PCI bus * during FSP-Silicon init call. Hence PWRMBASE * can't be accessible using PCI configuration space * read/write. */ uint8_t *pmc_mmio_regs(void) { return (void *)(uintptr_t)PCH_PWRM_BASE_ADDRESS; } uintptr_t soc_read_pmc_base(void) { return (uintptr_t)pmc_mmio_regs(); } uint32_t *soc_pmc_etr_addr(void) { return (uint32_t *)(soc_read_pmc_base() + ETR); } void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2) { DEVTREE_CONST struct soc_intel_tigerlake_config *config; config = config_of_soc(); /* Assign to out variable */ *dw0 = config->pmc_gpe0_dw0; *dw1 = config->pmc_gpe0_dw1; *dw2 = config->pmc_gpe0_dw2; } static int rtc_failed(uint32_t gen_pmcon_b) { return !!(gen_pmcon_b & RTC_BATTERY_DEAD); } static void clear_rtc_failed(void) { clrbits8(pmc_mmio_regs() + GEN_PMCON_B, RTC_BATTERY_DEAD); } static int check_rtc_failed(uint32_t gen_pmcon_b) { const int failed = rtc_failed(gen_pmcon_b); if (failed) { clear_rtc_failed(); printk(BIOS_DEBUG, "rtc_failed = 0x%x\n", failed); } return failed; } int soc_get_rtc_failed(void) { const struct chipset_power_state *ps; if (acpi_fetch_pm_state(&ps, PS_CLAIMER_RTC) < 0) return 1; return check_rtc_failed(ps->gen_pmcon_b); } int vbnv_cmos_failed(void) { return check_rtc_failed(read32(pmc_mmio_regs() + GEN_PMCON_B)); } static inline int deep_s3_enabled(void) { uint32_t deep_s3_pol; deep_s3_pol = read32(pmc_mmio_regs() + S3_PWRGATE_POL); return !!(deep_s3_pol & (S3DC_GATE_SUS | S3AC_GATE_SUS)); } /* Return 0, 3, or 5 to indicate the previous sleep state. */ int soc_prev_sleep_state(const struct chipset_power_state *ps, int prev_sleep_state) { /* * Check for any power failure to determine if this a wake from * S5 because the PCH does not set the WAK_STS bit when waking * from a true G3 state. */ if (!(ps->pm1_sts & WAK_STS) && (ps->gen_pmcon_a & (PWR_FLR | SUS_PWR_FLR))) prev_sleep_state = ACPI_S5; /* * If waking from S3 determine if deep S3 is enabled. If not, * need to check both deep sleep well and normal suspend well. * Otherwise just check deep sleep well. */ if (prev_sleep_state == ACPI_S3) { /* PWR_FLR represents deep sleep power well loss. */ uint32_t mask = PWR_FLR; /* If deep s3 isn't enabled check the suspend well too. */ if (!deep_s3_enabled()) mask |= SUS_PWR_FLR; if (ps->gen_pmcon_a & mask) prev_sleep_state = ACPI_S5; } return prev_sleep_state; } void soc_fill_power_state(struct chipset_power_state *ps) { uint8_t *pmc; ps->tco1_sts = tco_read_reg(TCO1_STS); ps->tco2_sts = tco_read_reg(TCO2_STS); printk(BIOS_DEBUG, "TCO_STS: %04x %04x\n", ps->tco1_sts, ps->tco2_sts); pmc = pmc_mmio_regs(); ps->gen_pmcon_a = read32(pmc + GEN_PMCON_A); ps->gen_pmcon_b = read32(pmc + GEN_PMCON_B); ps->gblrst_cause[0] = read32(pmc + GBLRST_CAUSE0); ps->gblrst_cause[1] = read32(pmc + GBLRST_CAUSE1); ps->hpr_cause0 = read32(pmc + HPR_CAUSE0); printk(BIOS_DEBUG, "GEN_PMCON: %08x %08x\n", ps->gen_pmcon_a, ps->gen_pmcon_b); printk(BIOS_DEBUG, "GBLRST_CAUSE: %08x %08x\n", ps->gblrst_cause[0], ps->gblrst_cause[1]); printk(BIOS_DEBUG, "HPR_CAUSE0: %08x\n", ps->hpr_cause0); } /* STM Support */ uint16_t get_pmbase(void) { return (uint16_t)ACPI_BASE_ADDRESS; } /* * Set which power state system will be after reapplying * the power (from G3 State) */ void pmc_soc_set_afterg3_en(const bool on) { uint8_t reg8; uint8_t *const pmcbase = pmc_mmio_regs(); reg8 = read8(pmcbase + GEN_PMCON_A); if (on) reg8 &= ~SLEEP_AFTER_POWER_FAIL; else reg8 |= SLEEP_AFTER_POWER_FAIL; write8(pmcbase + GEN_PMCON_A, reg8); }