/* SPDX-License-Identifier: GPL-2.0-only */ /* * Helper functions for dealing with power management registers * and the differences between PCH variants. */ #define __SIMPLE_DEVICE__ #include <acpi/acpi.h> #include <device/mmio.h> #include <device/pci_ops.h> #include <device/device.h> #include <device/pci.h> #include <device/pci_def.h> #include <console/console.h> #include <intelblocks/pmclib.h> #include <intelblocks/lpc_lib.h> #include <intelblocks/tco.h> #include <soc/gpe.h> #include <soc/gpio.h> #include <soc/iomap.h> #include <soc/pci_devs.h> #include <soc/pm.h> #include <soc/pmc.h> #include <soc/smbus.h> #include <security/vboot/vbnv.h> #include "chip.h" /* * SMI */ const char *const *soc_smi_sts_array(size_t *smi_arr) { 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", }; *smi_arr = ARRAY_SIZE(smi_sts_bits); return smi_sts_bits; } /* * TCO */ const char *const *soc_tco_sts_array(size_t *tco_arr) { 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" }; *tco_arr = ARRAY_SIZE(tco_sts_bits); return tco_sts_bits; } /* * GPE0 */ const char *const *soc_std_gpe_sts_array(size_t *gpe_arr) { 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" }; *gpe_arr = ARRAY_SIZE(gpe_sts_bits); return gpe_sts_bits; } void pmc_set_disb(void) { /* Set the DISB after DRAM init */ u32 disb_val; const pci_devfn_t dev = PCH_DEV_PMC; 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); } uint8_t *pmc_mmio_regs(void) { uint32_t reg32; reg32 = pci_read_config32(PCH_DEV_PMC, PWRMBASE); /* 4KiB alignment. */ reg32 &= ~0xfff; return (void *)(uintptr_t) reg32; } uintptr_t soc_read_pmc_base(void) { return (uintptr_t) (pmc_mmio_regs()); } uint32_t *soc_pmc_etr_addr(void) { /* * The pointer returned must not be cached, because the address depends on the * MMCONF base address and the assigned PCI bus number, which both may change * during the boot process! */ return pci_mmio_config32_addr(PCH_DEVFN_PMC << 12, ETR); } void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2) { DEVTREE_CONST struct soc_intel_skylake_config *config; config = config_of_soc(); /* Assign to out variable */ *dw0 = config->gpe0_dw0; *dw1 = config->gpe0_dw1; *dw2 = config->gpe0_dw2; } int rtc_failure(void) { u8 reg8; int rtc_failed; /* PMC Controller Device 0x1F, Func 02 */ const pci_devfn_t dev = PCH_DEV_PMC; reg8 = pci_read_config8(dev, GEN_PMCON_B); rtc_failed = reg8 & RTC_BATTERY_DEAD; if (rtc_failed) { reg8 &= ~RTC_BATTERY_DEAD; pci_write_config8(dev, GEN_PMCON_B, reg8); printk(BIOS_DEBUG, "rtc_failed = 0x%x\n", rtc_failed); } return !!rtc_failed; } int vbnv_cmos_failed(void) { return rtc_failure(); } /* 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_b & (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_b & 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); ps->gen_pmcon_a = pci_read_config32(PCH_DEV_PMC, GEN_PMCON_A); ps->gen_pmcon_b = pci_read_config32(PCH_DEV_PMC, GEN_PMCON_B); pmc = pmc_mmio_regs(); ps->gblrst_cause[0] = read32(pmc + GBLRST_CAUSE0); ps->gblrst_cause[1] = read32(pmc + GBLRST_CAUSE1); 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]); } /* STM Support */ uint16_t get_pmbase(void) { return 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; const pci_devfn_t dev = PCH_DEV_PMC; reg8 = pci_read_config8(dev, GEN_PMCON_B); if (on) reg8 &= ~SLEEP_AFTER_POWER_FAIL; else reg8 |= SLEEP_AFTER_POWER_FAIL; pci_write_config8(dev, GEN_PMCON_B, reg8); }