| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2014 Google Inc. |
| * Copyright (C) 2015 Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| /* |
| * Helper functions for dealing with power management registers |
| * and the differences between PCH variants. |
| */ |
| |
| #include <arch/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 <stdlib.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 <timer.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[] = { |
| [2] = "BIOS", |
| [3] = "LEGACY_USB", |
| [4] = "SLP_SMI", |
| [5] = "APM", |
| [6] = "SWSMI_TMR", |
| [8] = "PM1", |
| [9] = "GPE0", |
| [10] = "GPI", |
| [11] = "MCSMI", |
| [12] = "DEVMON", |
| [13] = "TCO", |
| [14] = "PERIODIC", |
| [15] = "SERIRQ_SMI", |
| [16] = "SMBUS_SMI", |
| [17] = "LEGACY_USB2", |
| [18] = "INTEL_USB2", |
| [20] = "PCI_EXP_SMI", |
| [21] = "MONITOR", |
| [26] = "SPI", |
| [27] = "GPIO_UNLOCK", |
| [28] = "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; |
| } |
| |
| int acpi_sci_irq(void) |
| { |
| int scis = pci_read_config32(PCH_DEV_PMC, ACTL) & SCI_IRQ_SEL; |
| int sci_irq = 9; |
| |
| /* Determine how SCI is routed. */ |
| switch (scis) { |
| case SCIS_IRQ9: |
| case SCIS_IRQ10: |
| case SCIS_IRQ11: |
| sci_irq = scis - SCIS_IRQ9 + 9; |
| break; |
| case SCIS_IRQ20: |
| case SCIS_IRQ21: |
| case SCIS_IRQ22: |
| case SCIS_IRQ23: |
| sci_irq = scis - SCIS_IRQ20 + 20; |
| break; |
| default: |
| printk(BIOS_DEBUG, "Invalid SCI route! Defaulting to IRQ9.\n"); |
| sci_irq = 9; |
| break; |
| } |
| |
| printk(BIOS_DEBUG, "SCI is IRQ%d\n", sci_irq); |
| return sci_irq; |
| } |
| |
| 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()); |
| } |
| |
| void soc_get_gpi_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2) |
| { |
| DEVTREE_CONST struct soc_intel_skylake_config *config; |
| |
| /* Look up the device in devicetree */ |
| DEVTREE_CONST struct device *dev = dev_find_slot(0, PCH_DEVFN_PMC); |
| if (!dev || !dev->chip_info) { |
| printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n"); |
| return; |
| } |
| config = dev->chip_info; |
| |
| /* 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 */ |
| #if defined(__SIMPLE_DEVICE__) |
| pci_devfn_t dev = PCH_DEV_PMC; |
| #else |
| struct device *dev = PCH_DEV_PMC; |
| #endif |
| 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]); |
| } |