diff options
Diffstat (limited to 'src/soc/intel/fsp_broadwell_de/pmutil.c')
| -rw-r--r-- | src/soc/intel/fsp_broadwell_de/pmutil.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/soc/intel/fsp_broadwell_de/pmutil.c b/src/soc/intel/fsp_broadwell_de/pmutil.c new file mode 100644 index 0000000000..bd19104f4d --- /dev/null +++ b/src/soc/intel/fsp_broadwell_de/pmutil.c @@ -0,0 +1,173 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Google Inc. + * Copyright (C) 2017 Siemens AG + * + * 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/io.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> + +/* Print status bits with descriptive names */ +static void print_status_bits(u32 status, const char * const 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); + } + } +} + +/* 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); +} + +/* 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) +{ + static const char * const 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); +} + +/* 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) +{ + 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" + }; + + 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); +} |