| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <bootstate.h> |
| #include <console/console.h> |
| #include <device/mmio.h> |
| #include <device/device.h> |
| #include <device/pci_ops.h> |
| #include <intelblocks/pmc.h> |
| #include <intelblocks/pmclib.h> |
| #include <intelblocks/rtc.h> |
| #include <reg_script.h> |
| #include <soc/pci_devs.h> |
| #include <soc/pm.h> |
| |
| #include "chip.h" |
| |
| /* |
| * 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; |
| #if defined(__SIMPLE_DEVICE__) |
| const pci_devfn_t dev = PCH_DEV_PMC; |
| #else |
| const struct device *const dev = PCH_DEV_PMC; |
| #endif |
| |
| 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); |
| } |
| |
| #if ENV_RAMSTAGE |
| /* Fill up PMC resource structure */ |
| int pmc_soc_get_resources(struct pmc_resource_config *cfg) |
| { |
| cfg->pwrmbase_offset = PWRMBASE; |
| cfg->pwrmbase_addr = PCH_PWRM_BASE_ADDRESS; |
| cfg->pwrmbase_size = PCH_PWRM_BASE_SIZE; |
| cfg->abase_offset = ABASE; |
| cfg->abase_addr = ACPI_BASE_ADDRESS; |
| cfg->abase_size = ACPI_BASE_SIZE; |
| |
| return 0; |
| } |
| |
| static const struct reg_script pch_pmc_misc_init_script[] = { |
| /* SLP_S4=4s, SLP_S3=50ms, disable SLP_X stretching after SUS loss. */ |
| REG_PCI_RMW16(GEN_PMCON_B, |
| ~(S4MAW_MASK | SLP_S3_MIN_ASST_WDTH_MASK), |
| S4MAW_4S | SLP_S3_MIN_ASST_WDTH_50MS | |
| DIS_SLP_X_STRCH_SUS_UP), |
| /* Enable SCI and clear SLP requests. */ |
| REG_IO_RMW32(ACPI_BASE_ADDRESS + PM1_CNT, ~SLP_TYP, SCI_EN), |
| REG_SCRIPT_END |
| }; |
| |
| static const struct reg_script pmc_write1_to_clear_script[] = { |
| REG_PCI_OR32(GEN_PMCON_A, 0), |
| REG_PCI_OR32(GEN_PMCON_B, 0), |
| REG_PCI_OR32(GEN_PMCON_B, 0), |
| REG_RES_OR32(PWRMBASE, GBLRST_CAUSE0, 0), |
| REG_RES_OR32(PWRMBASE, GBLRST_CAUSE1, 0), |
| REG_SCRIPT_END |
| }; |
| |
| static void config_deep_sX(uint32_t offset, uint32_t mask, int sx, int enable) |
| { |
| uint32_t reg; |
| uint8_t *pmcbase = pmc_mmio_regs(); |
| |
| printk(BIOS_DEBUG, "%sabling Deep S%c\n", |
| enable ? "En" : "Dis", sx + '0'); |
| reg = read32(pmcbase + offset); |
| if (enable) |
| reg |= mask; |
| else |
| reg &= ~mask; |
| write32(pmcbase + offset, reg); |
| } |
| |
| static void config_deep_s5(int on_ac, int on_dc) |
| { |
| /* Treat S4 the same as S5. */ |
| config_deep_sX(S4_PWRGATE_POL, S4AC_GATE_SUS, 4, on_ac); |
| config_deep_sX(S4_PWRGATE_POL, S4DC_GATE_SUS, 4, on_dc); |
| config_deep_sX(S5_PWRGATE_POL, S5AC_GATE_SUS, 5, on_ac); |
| config_deep_sX(S5_PWRGATE_POL, S5DC_GATE_SUS, 5, on_dc); |
| } |
| |
| static void config_deep_s3(int on_ac, int on_dc) |
| { |
| config_deep_sX(S3_PWRGATE_POL, S3AC_GATE_SUS, 3, on_ac); |
| config_deep_sX(S3_PWRGATE_POL, S3DC_GATE_SUS, 3, on_dc); |
| } |
| |
| static void config_deep_sx(uint32_t deepsx_config) |
| { |
| uint32_t reg; |
| uint8_t *pmcbase = pmc_mmio_regs(); |
| |
| reg = read32(pmcbase + DSX_CFG); |
| reg &= ~DSX_CFG_MASK; |
| reg |= deepsx_config; |
| write32(pmcbase + DSX_CFG, reg); |
| } |
| |
| void pmc_soc_init(struct device *dev) |
| { |
| const config_t *config = config_of(dev); |
| |
| rtc_init(); |
| |
| pmc_set_power_failure_state(true); |
| pmc_gpe_init(); |
| |
| /* Note that certain bits may be cleared from running script as |
| * certain bit fields are write 1 to clear. */ |
| reg_script_run_on_dev(dev, pch_pmc_misc_init_script); |
| pmc_set_acpi_mode(); |
| |
| config_deep_s3(config->deep_s3_enable_ac, config->deep_s3_enable_dc); |
| config_deep_s5(config->deep_s5_enable_ac, config->deep_s5_enable_dc); |
| config_deep_sx(config->deep_sx_config); |
| |
| /* Clear registers that contain write-1-to-clear bits. */ |
| reg_script_run_on_dev(dev, pmc_write1_to_clear_script); |
| } |
| |
| static void pm1_enable_pwrbtn_smi(void *unused) |
| { |
| /* |
| * Enable power button SMI only before jumping to payload. This ensures |
| * that: |
| * 1. Power button SMI is enabled only after coreboot is done. |
| * 2. On resume path, power button SMI is not enabled and thus avoids |
| * any shutdowns because of power button presses due to power button |
| * press in resume path. |
| */ |
| pmc_update_pm1_enable(PWRBTN_EN); |
| } |
| |
| BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, pm1_enable_pwrbtn_smi, NULL); |
| |
| /* |
| * Check if WAKE# pin is enabled based on DSX_EN_WAKE_PIN setting in |
| * deep_sx_config. If WAKE# pin is not enabled, then PCI Express Wake Disable |
| * bit needs to be set in PM1_EN to avoid unnecessary wakes caused by WAKE# |
| * pin. |
| */ |
| static void pm1_handle_wake_pin(void *unused) |
| { |
| const config_t *conf = config_of_soc(); |
| |
| /* If WAKE# pin is enabled, bail out early. */ |
| if (conf->deep_sx_config & DSX_EN_WAKE_PIN) |
| return; |
| |
| pmc_update_pm1_enable(PCIEXPWAK_DIS); |
| } |
| |
| BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, pm1_handle_wake_pin, NULL); |
| BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_EXIT, pm1_handle_wake_pin, NULL); |
| |
| #endif |