/* * This file is part of the coreboot project. * * Copyright (C) 2014 Google Inc. * * 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 <arch/io.h> #include <device/pci_ops.h> #include <device/device.h> #include <device/pci.h> #include <device/pci_def.h> #include <console/console.h> #include <soc/iomap.h> #include <soc/lpc.h> #include <soc/pci_devs.h> #include <soc/pm.h> #include <soc/gpio.h> #include <security/vboot/vbnv.h> #include <security/vboot/vboot_common.h> /* Print status bits with descriptive names */ static void print_status_bits(u32 status, const char *bit_names[]) { int i; if (!status) return; for (i = 31; i >= 0; i--) { if (status & (1 << i)) { if (bit_names[i]) printk(BIOS_DEBUG, "%s ", bit_names[i]); else printk(BIOS_DEBUG, "BIT%d ", i); } } } /* Print status bits as GPIO numbers */ static void print_gpio_status(u32 status, int start) { int i; if (!status) return; for (i = 31; i >= 0; i--) { if (status & (1 << i)) printk(BIOS_DEBUG, "GPIO%d ", start + i); } } /* * PM1_CNT */ /* Enable events in PM1 control register */ void enable_pm1_control(u32 mask) { u32 pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT); pm1_cnt |= mask; outl(pm1_cnt, ACPI_BASE_ADDRESS + PM1_CNT); } /* Disable events in PM1 control register */ void disable_pm1_control(u32 mask) { u32 pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT); pm1_cnt &= ~mask; outl(pm1_cnt, ACPI_BASE_ADDRESS + PM1_CNT); } /* * PM1 */ /* Clear and return PM1 status register */ static u16 reset_pm1_status(void) { u16 pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS); outw(pm1_sts, ACPI_BASE_ADDRESS + PM1_STS); return pm1_sts; } /* Print PM1 status bits */ static u16 print_pm1_status(u16 pm1_sts) { const char *pm1_sts_bits[] = { [0] = "TMROF", [4] = "BM", [5] = "GBL", [8] = "PWRBTN", [10] = "RTC", [11] = "PRBTNOR", [14] = "PCIEXPWAK", [15] = "WAK", }; if (!pm1_sts) return 0; printk(BIOS_SPEW, "PM1_STS: "); print_status_bits(pm1_sts, pm1_sts_bits); printk(BIOS_SPEW, "\n"); return pm1_sts; } /* Print, clear, and return PM1 status */ u16 clear_pm1_status(void) { return print_pm1_status(reset_pm1_status()); } /* Set the PM1 register to events */ void enable_pm1(u16 events) { outw(events, ACPI_BASE_ADDRESS + PM1_EN); } /* * SMI */ /* Clear and return SMI status register */ static u32 reset_smi_status(void) { u32 smi_sts = inl(ACPI_BASE_ADDRESS + SMI_STS); outl(smi_sts, ACPI_BASE_ADDRESS + SMI_STS); return smi_sts; } /* Print SMI status bits */ static u32 print_smi_status(u32 smi_sts) { const char *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" }; if (!smi_sts) return 0; printk(BIOS_DEBUG, "SMI_STS: "); print_status_bits(smi_sts, smi_sts_bits); printk(BIOS_DEBUG, "\n"); return smi_sts; } /* Print, clear, and return SMI status */ u32 clear_smi_status(void) { return print_smi_status(reset_smi_status()); } /* Enable SMI event */ void enable_smi(u32 mask) { u32 smi_en = inl(ACPI_BASE_ADDRESS + SMI_EN); smi_en |= mask; outl(smi_en, ACPI_BASE_ADDRESS + SMI_EN); } /* Disable SMI event */ void disable_smi(u32 mask) { u32 smi_en = inl(ACPI_BASE_ADDRESS + SMI_EN); smi_en &= ~mask; outl(smi_en, ACPI_BASE_ADDRESS + SMI_EN); } /* * ALT_GP_SMI */ /* Clear GPIO SMI status and return events that are enabled and active */ static u32 reset_alt_smi_status(void) { u32 alt_sts, alt_en; /* Low Power variant moves this to GPIO region as dword */ alt_sts = inl(GPIO_BASE_ADDRESS + GPIO_ALT_GPI_SMI_STS); outl(alt_sts, GPIO_BASE_ADDRESS + GPIO_ALT_GPI_SMI_STS); alt_en = inl(GPIO_BASE_ADDRESS + GPIO_ALT_GPI_SMI_EN); /* Only report enabled events */ return alt_sts & alt_en; } /* Print GPIO SMI status bits */ static u32 print_alt_smi_status(u32 alt_sts) { if (!alt_sts) return 0; printk(BIOS_DEBUG, "ALT_STS: "); /* First 16 events are GPIO 32-47 */ print_gpio_status(alt_sts & 0xffff, 32); printk(BIOS_DEBUG, "\n"); return alt_sts; } /* Print, clear, and return GPIO SMI status */ u32 clear_alt_smi_status(void) { return print_alt_smi_status(reset_alt_smi_status()); } /* Enable GPIO SMI events */ void enable_alt_smi(u32 mask) { u32 alt_en; alt_en = inl(GPIO_BASE_ADDRESS + GPIO_ALT_GPI_SMI_EN); alt_en |= mask; outl(alt_en, GPIO_BASE_ADDRESS + GPIO_ALT_GPI_SMI_EN); } /* * TCO */ /* Clear TCO status and return events that are enabled and active */ static u32 reset_tco_status(void) { u32 tcobase = ACPI_BASE_ADDRESS + 0x60; u32 tco_sts = inl(tcobase + 0x04); u32 tco_en = inl(ACPI_BASE_ADDRESS + 0x68); /* Don't clear BOOT_STS before SECOND_TO_STS */ outl(tco_sts & ~(1 << 18), tcobase + 0x04); /* Clear BOOT_STS */ if (tco_sts & (1 << 18)) outl(tco_sts & (1 << 18), tcobase + 0x04); return tco_sts & tco_en; } /* Print TCO status bits */ static u32 print_tco_status(u32 tco_sts) { const char *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" }; if (!tco_sts) return 0; printk(BIOS_DEBUG, "TCO_STS: "); print_status_bits(tco_sts, tco_sts_bits); printk(BIOS_DEBUG, "\n"); return tco_sts; } /* Print, clear, and return TCO status */ u32 clear_tco_status(void) { return print_tco_status(reset_tco_status()); } /* Enable TCO SCI */ void enable_tco_sci(void) { /* Clear pending events */ outl(ACPI_BASE_ADDRESS + GPE0_STS(3), TCOSCI_STS); /* Enable TCO SCI events */ enable_gpe(TCOSCI_EN); } /* * GPE0 */ /* Clear a GPE0 status and return events that are enabled and active */ static u32 reset_gpe(u16 sts_reg, u16 en_reg) { u32 gpe0_sts = inl(ACPI_BASE_ADDRESS + sts_reg); u32 gpe0_en = inl(ACPI_BASE_ADDRESS + en_reg); outl(gpe0_sts, ACPI_BASE_ADDRESS + sts_reg); /* Only report enabled events */ return gpe0_sts & gpe0_en; } /* Print GPE0 status bits */ static u32 print_gpe_status(u32 gpe0_sts, const char *bit_names[]) { if (!gpe0_sts) return 0; printk(BIOS_DEBUG, "GPE0_STS: "); print_status_bits(gpe0_sts, bit_names); printk(BIOS_DEBUG, "\n"); return gpe0_sts; } /* Print GPE0 GPIO status bits */ static u32 print_gpe_gpio(u32 gpe0_sts, int start) { if (!gpe0_sts) return 0; printk(BIOS_DEBUG, "GPE0_STS: "); print_gpio_status(gpe0_sts, start); printk(BIOS_DEBUG, "\n"); return gpe0_sts; } /* Clear all GPE status and return "standard" GPE event status */ u32 clear_gpe_status(void) { const char *gpe0_sts_3_bits[] = { [1] = "HOTPLUG", [2] = "SWGPE", [6] = "TCO_SCI", [7] = "SMB_WAK", [9] = "PCI_EXP", [10] = "BATLOW", [11] = "PME", [12] = "ME", [13] = "PME_B0", [16] = "GPIO27", [18] = "WADT" }; print_gpe_gpio(reset_gpe(GPE0_STS(GPE_31_0), GPE0_EN(GPE_31_0)), 0); print_gpe_gpio(reset_gpe(GPE0_STS(GPE_63_32), GPE0_EN(GPE_63_32)), 32); print_gpe_gpio(reset_gpe(GPE0_STS(GPE_94_64), GPE0_EN(GPE_94_64)), 64); return print_gpe_status(reset_gpe(GPE0_STS(GPE_STD), GPE0_EN(GPE_STD)), gpe0_sts_3_bits); } /* Enable all requested GPE */ void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4) { outl(set1, ACPI_BASE_ADDRESS + GPE0_EN(GPE_31_0)); outl(set2, ACPI_BASE_ADDRESS + GPE0_EN(GPE_63_32)); outl(set3, ACPI_BASE_ADDRESS + GPE0_EN(GPE_94_64)); outl(set4, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD)); } /* Disable all GPE */ void disable_all_gpe(void) { enable_all_gpe(0, 0, 0, 0); } /* Enable a standard GPE */ void enable_gpe(u32 mask) { u32 gpe0_en = inl(ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD)); gpe0_en |= mask; outl(gpe0_en, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD)); } /* Disable a standard GPE */ void disable_gpe(u32 mask) { u32 gpe0_en = inl(ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD)); gpe0_en &= ~mask; outl(gpe0_en, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD)); } int acpi_sci_irq(void) { int scis = pci_read_config32(PCH_DEV_LPC, ACPI_CNTL) & 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; } int rtc_failure(void) { u8 reg8; int rtc_failed; #if defined(__SIMPLE_DEVICE__) pci_devfn_t dev = PCH_DEV_LPC; #else struct device *dev = PCH_DEV_LPC; #endif reg8 = pci_read_config8(dev, GEN_PMCON_3); rtc_failed = reg8 & RTC_BATTERY_DEAD; if (rtc_failed) { reg8 &= ~RTC_BATTERY_DEAD; pci_write_config8(dev, GEN_PMCON_3, reg8); printk(BIOS_DEBUG, "rtc_failed = 0x%x\n", rtc_failed); } return !!rtc_failed; } int vbnv_cmos_failed(void) { return rtc_failure(); } int vboot_platform_is_resuming(void) { if (!(inw(ACPI_BASE_ADDRESS + PM1_STS) & WAK_STS)) return 0; return acpi_sleep_from_pm1(inl(ACPI_BASE_ADDRESS + PM1_CNT)) == ACPI_S3; }