diff options
Diffstat (limited to 'src/soc/intel/apollolake/pmutil.c')
| -rw-r--r-- | src/soc/intel/apollolake/pmutil.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c new file mode 100644 index 0000000000..ce822ffa19 --- /dev/null +++ b/src/soc/intel/apollolake/pmutil.c @@ -0,0 +1,327 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * Copyright (C) 2015-2016 Intel Corp. + * + * 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, or (at your option) + * any later version. + * + * 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. + */ + +#include <arch/io.h> +#include <console/console.h> +#include <rules.h> +#include <device/pci_def.h> +#include <soc/iomap.h> +#include <soc/pm.h> +#include <device/device.h> +#include <device/pci.h> + + +static void print_num_status_bits(int num_bits, uint32_t status, + const char * const bit_names[]) +{ + int i; + + if (!status) + return; + + for (i = num_bits - 1; 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); + } + } +} + +static uint32_t print_smi_status(uint32_t smi_sts) +{ + static const char * const smi_sts_bits[] = { + [2] = "BIOS", + [3] = "LEGACY USB", + [4] = "SLP_SMI", + [5] = "APM", + [6] = "SWSMI_TMR", + [10]= "GPIO_SMI", + [11]= "GPIO_UNLOCK_SSMI", + [12] = "MCSMI", + [13] = "TCO", + [14] = "PERIODIC", + [15] = "SERIRQ", + [16] = "SMBUS_SMI", + [17] = "XHCI", + [18] = "HOST_SMBUS", + [19] = "SCS", + [20] = "PCI_EXP_SMI", + [21] = "SCC2", + [25] = "SPI_SSMI", + [26] = "SPI", + [27] = "OCP_CSE", + }; + + if (!smi_sts) + return 0; + + printk(BIOS_DEBUG, "SMI_STS: "); + print_num_status_bits(ARRAY_SIZE(smi_sts_bits), smi_sts, smi_sts_bits); + printk(BIOS_DEBUG, "\n"); + + return smi_sts; +} + +static uint32_t reset_smi_status(void) +{ + uint32_t smi_sts = inl(ACPI_PMIO_BASE + SMI_STS); + outl(smi_sts, ACPI_PMIO_BASE + SMI_STS); + return smi_sts; +} + +uint32_t clear_smi_status(void) +{ + return print_smi_status(reset_smi_status()); +} + +uint32_t get_smi_en(void) +{ + return inl(ACPI_PMIO_BASE + SMI_EN); +} + +void enable_smi(uint32_t mask) +{ + uint32_t smi_en = inl(ACPI_PMIO_BASE + SMI_EN); + smi_en |= mask; + outl(smi_en, ACPI_PMIO_BASE + SMI_EN); +} + +void disable_smi(uint32_t mask) +{ + uint32_t smi_en = inl(ACPI_PMIO_BASE + SMI_EN); + smi_en &= ~mask; + outl(smi_en, ACPI_PMIO_BASE + SMI_EN); +} + +void enable_pm1_control(uint32_t mask) +{ + uint32_t pm1_cnt = inl(ACPI_PMIO_BASE + PM1_CNT); + pm1_cnt |= mask; + outl(pm1_cnt, ACPI_PMIO_BASE + PM1_CNT); +} + +void disable_pm1_control(uint32_t mask) +{ + uint32_t pm1_cnt = inl(ACPI_PMIO_BASE + PM1_CNT); + pm1_cnt &= ~mask; + outl(pm1_cnt, ACPI_PMIO_BASE + PM1_CNT); +} + +static uint16_t reset_pm1_status(void) +{ + uint16_t pm1_sts = inw(ACPI_PMIO_BASE + PM1_STS); + outw(pm1_sts, ACPI_PMIO_BASE + PM1_STS); + return pm1_sts; +} + +static uint16_t print_pm1_status(uint16_t pm1_sts) +{ + static const char * const pm1_sts_bits[] = { + [0] = "TMROF", + [5] = "GBL", + [8] = "PWRBTN", + [10] = "RTC", + [11] = "PRBTNOR", + [13] = "USB", + [14] = "PCIEXPWAK", + [15] = "WAK", + }; + + if (!pm1_sts) + return 0; + + printk(BIOS_SPEW, "PM1_STS: "); + print_num_status_bits(ARRAY_SIZE(pm1_sts_bits), pm1_sts, pm1_sts_bits); + printk(BIOS_SPEW, "\n"); + + return pm1_sts; +} + +uint16_t clear_pm1_status(void) +{ + return print_pm1_status(reset_pm1_status()); +} + +void enable_pm1(uint16_t events) +{ + outw(events, ACPI_PMIO_BASE + PM1_EN); +} + +static uint32_t print_tco_status(uint32_t tco_sts) +{ + static const char * const tco_sts_bits[] = { + [3] = "TIMEOUT", + [17] = "SECOND_TO", + }; + + if (!tco_sts) + return 0; + + printk(BIOS_DEBUG, "TCO_STS: "); + print_num_status_bits(ARRAY_SIZE(tco_sts_bits), tco_sts, tco_sts_bits); + printk(BIOS_DEBUG, "\n"); + + return tco_sts; +} + +static uint32_t reset_tco_status(void) +{ + uint32_t tco_sts = inl(ACPI_PMIO_BASE + TCO_STS); + uint32_t tco_en = inl(ACPI_PMIO_BASE + TCO1_CNT); + + outl(tco_sts, ACPI_PMIO_BASE + TCO_STS); + return tco_sts & tco_en; +} + +uint32_t clear_tco_status(void) +{ + return print_tco_status(reset_tco_status()); +} + +void enable_gpe(uint32_t mask) +{ + uint32_t gpe0a_en = inl(ACPI_PMIO_BASE + GPE0_EN(0)); + gpe0a_en |= mask; + outl(gpe0a_en, ACPI_PMIO_BASE + GPE0_EN(0)); +} + +void disable_gpe(uint32_t mask) +{ + uint32_t gpe0a_en = inl(ACPI_PMIO_BASE + GPE0_EN(0)); + gpe0a_en &= ~mask; + outl(gpe0a_en, ACPI_PMIO_BASE + GPE0_EN(0)); +} + +void disable_all_gpe(void) +{ + disable_gpe(~0); +} + + +static uint32_t reset_gpe_status(void) +{ + uint32_t gpe_sts = inl(ACPI_PMIO_BASE + GPE0_STS(0)); + outl(gpe_sts, ACPI_PMIO_BASE + GPE0_STS(0)); + return gpe_sts; +} + +static uint32_t print_gpe_sts(uint32_t gpe_sts) +{ + static const char * const gpe_sts_bits[] = { + [0] = "PCIE_SCI", + [2] = "SWGPE", + [3] = "PCIE_WAKE0", + [4] = "PUNIT", + [6] = "PCIE_WAKE1", + [7] = "PCIE_WAKE2", + [8] = "PCIE_WAKE3", + [9] = "PCI_EXP", + [10] = "BATLOW", + [11] = "CSE_PME", + [12] = "XDCI_PME", + [13] = "XHCI_PME", + [14] = "AVS_PME", + [15] = "GPIO_TIER1_SCI", + [16] = "SMB_WAK", + [17] = "SATA_PME", + }; + + if (!gpe_sts) + return gpe_sts; + + printk(BIOS_DEBUG, "GPE0a_STS: "); + print_num_status_bits(ARRAY_SIZE(gpe_sts_bits), gpe_sts, gpe_sts_bits); + printk(BIOS_DEBUG, "\n"); + + return gpe_sts; +} + +uint32_t clear_gpe_status(void) +{ + return print_gpe_sts(reset_gpe_status()); +} + +void clear_pmc_status(void) +{ + uint32_t prsts; + uint32_t gen_pmcon1; + + prsts = read32((void *)(PMC_BAR0 + PRSTS)); + gen_pmcon1 = read32((void *)(PMC_BAR0 + GEN_PMCON1)); + + /* Clear the status bits. The RPS field is cleared on a 0 write. */ + write32((void *)(PMC_BAR0 + GEN_PMCON1), gen_pmcon1 & ~RPS); + write32((void *)(PMC_BAR0 + PRSTS), prsts); +} + + +/* Return 0, 3, or 5 to indicate the previous sleep state. */ +int chipset_prev_sleep_state(struct chipset_power_state *ps) +{ + /* Default to S0. */ + int prev_sleep_state = SLEEP_STATE_S0; + + if (ps->pm1_sts & WAK_STS) { + switch ((ps->pm1_cnt & SLP_TYP) >> SLP_TYP_SHIFT) { +#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME) + case SLP_TYP_S3: + prev_sleep_state = SLEEP_STATE_S3; + break; +#endif + case SLP_TYP_S5: + prev_sleep_state = SLEEP_STATE_S5; + break; + } + } + return prev_sleep_state; +} + +/* returns prev_sleep_state */ +int fill_power_state(struct chipset_power_state *ps) +{ + int i; + ps->pm1_sts = inw(ACPI_PMIO_BASE + PM1_STS); + ps->pm1_en = inw(ACPI_PMIO_BASE + PM1_EN); + ps->pm1_cnt = inl(ACPI_PMIO_BASE + PM1_CNT); + ps->tco_sts = inl(ACPI_PMIO_BASE + TCO_STS); + ps->prsts = read32((void *)(PMC_BAR0 + PRSTS)); + ps->gen_pmcon1 =read32((void *)(PMC_BAR0 + GEN_PMCON1)); + ps->gen_pmcon2 = read32((void *)(PMC_BAR0 + GEN_PMCON2)); + ps->gen_pmcon3 = read32((void *)(PMC_BAR0 + GEN_PMCON3)); + + ps->prev_sleep_state = chipset_prev_sleep_state(ps); + + printk(BIOS_DEBUG, "pm1_sts: %04x pm1_en: %04x pm1_cnt: %08x\n", + ps->pm1_sts, ps->pm1_en, ps->pm1_cnt); + printk(BIOS_DEBUG, "prsts: %08x tco_sts: %08x\n", + ps->prsts, ps->tco_sts); + printk(BIOS_DEBUG, + "gen_pmcon1: %08x gen_pmcon2: %08x gen_pmcon3: %08x\n", + ps->gen_pmcon1, ps->gen_pmcon2, ps->gen_pmcon3); + printk(BIOS_DEBUG, "smi_en: %08x smi_sts: %08x\n", + inl(ACPI_PMIO_BASE + SMI_EN), inl(ACPI_PMIO_BASE + SMI_STS)); + for (i=0; i < GPE0_REG_MAX; i++) { + ps->gpe0_sts[i] = inl(ACPI_PMIO_BASE + GPE0_STS(i)); + ps->gpe0_en[i] = inl(ACPI_PMIO_BASE + GPE0_EN(i)); + printk(BIOS_DEBUG, "gpe0_sts[%d]: %08x gpe0_en[%d]: %08x\n", + i, ps->gpe0_sts[i], i, ps->gpe0_en[i]); + } + printk(BIOS_DEBUG, "prev_sleep_state %d\n", ps->prev_sleep_state); + return ps->prev_sleep_state; +} |