| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <arch/io.h> |
| #include <device/pci_ops.h> |
| #include <cbmem.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_def.h> |
| #include <string.h> |
| #include <soc/iomap.h> |
| #include <soc/lpc.h> |
| #include <soc/pci_devs.h> |
| #include <soc/pm.h> |
| #include <soc/romstage.h> |
| |
| static struct chipset_power_state power_state; |
| |
| static void migrate_power_state(int is_recovery) |
| { |
| struct chipset_power_state *ps_cbmem; |
| struct chipset_power_state *ps_car; |
| |
| ps_car = &power_state; |
| ps_cbmem = cbmem_add(CBMEM_ID_POWER_STATE, sizeof(*ps_cbmem)); |
| |
| if (ps_cbmem == NULL) { |
| printk(BIOS_DEBUG, "Not adding power state to cbmem!\n"); |
| return; |
| } |
| memcpy(ps_cbmem, ps_car, sizeof(*ps_cbmem)); |
| } |
| CBMEM_CREATION_HOOK(migrate_power_state); |
| |
| /* Return 0, 3, or 5 to indicate the previous sleep state. */ |
| static int prev_sleep_state(const struct chipset_power_state *ps) |
| { |
| /* Default to S0. */ |
| int prev_sleep_state = ACPI_S0; |
| |
| if (ps->pm1_sts & WAK_STS) { |
| switch (acpi_sleep_from_pm1(ps->pm1_cnt)) { |
| case ACPI_S3: |
| if (CONFIG(HAVE_ACPI_RESUME)) |
| prev_sleep_state = ACPI_S3; |
| break; |
| case ACPI_S5: |
| prev_sleep_state = ACPI_S5; |
| break; |
| } |
| /* Clear SLP_TYP. */ |
| outl(ps->pm1_cnt & ~(SLP_TYP), ACPI_BASE_ADDRESS + PM1_CNT); |
| } |
| |
| if (ps->gen_pmcon3 & (PWR_FLR | SUS_PWR_FLR)) |
| prev_sleep_state = ACPI_S5; |
| |
| return prev_sleep_state; |
| } |
| |
| static void dump_power_state(struct chipset_power_state *ps) |
| { |
| printk(BIOS_DEBUG, "PM1_STS: %04x\n", ps->pm1_sts); |
| printk(BIOS_DEBUG, "PM1_EN: %04x\n", ps->pm1_en); |
| printk(BIOS_DEBUG, "PM1_CNT: %08x\n", ps->pm1_cnt); |
| printk(BIOS_DEBUG, "TCO_STS: %04x %04x\n", |
| ps->tco1_sts, ps->tco2_sts); |
| |
| printk(BIOS_DEBUG, "GPE0_STS: %08x %08x %08x %08x\n", |
| ps->gpe0_sts[0], ps->gpe0_sts[1], |
| ps->gpe0_sts[2], ps->gpe0_sts[3]); |
| printk(BIOS_DEBUG, "GPE0_EN: %08x %08x %08x %08x\n", |
| ps->gpe0_en[0], ps->gpe0_en[1], |
| ps->gpe0_en[2], ps->gpe0_en[3]); |
| |
| printk(BIOS_DEBUG, "GEN_PMCON: %04x %04x %04x\n", |
| ps->gen_pmcon1, ps->gen_pmcon2, ps->gen_pmcon3); |
| |
| printk(BIOS_DEBUG, "Previous Sleep State: S%d\n", |
| ps->prev_sleep_state); |
| } |
| |
| /* Fill power state structure from ACPI PM registers */ |
| struct chipset_power_state *fill_power_state(void) |
| { |
| struct chipset_power_state *ps = &power_state; |
| |
| ps->pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS); |
| ps->pm1_en = inw(ACPI_BASE_ADDRESS + PM1_EN); |
| ps->pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT); |
| ps->tco1_sts = inw(ACPI_BASE_ADDRESS + TCO1_STS); |
| ps->tco2_sts = inw(ACPI_BASE_ADDRESS + TCO2_STS); |
| ps->gpe0_sts[0] = inl(ACPI_BASE_ADDRESS + GPE0_STS(0)); |
| ps->gpe0_sts[1] = inl(ACPI_BASE_ADDRESS + GPE0_STS(1)); |
| ps->gpe0_sts[2] = inl(ACPI_BASE_ADDRESS + GPE0_STS(2)); |
| ps->gpe0_sts[3] = inl(ACPI_BASE_ADDRESS + GPE0_STS(3)); |
| ps->gpe0_en[0] = inl(ACPI_BASE_ADDRESS + GPE0_EN(0)); |
| ps->gpe0_en[1] = inl(ACPI_BASE_ADDRESS + GPE0_EN(1)); |
| ps->gpe0_en[2] = inl(ACPI_BASE_ADDRESS + GPE0_EN(2)); |
| ps->gpe0_en[3] = inl(ACPI_BASE_ADDRESS + GPE0_EN(3)); |
| |
| ps->gen_pmcon1 = pci_read_config16(PCH_DEV_LPC, GEN_PMCON_1); |
| ps->gen_pmcon2 = pci_read_config16(PCH_DEV_LPC, GEN_PMCON_2); |
| ps->gen_pmcon3 = pci_read_config16(PCH_DEV_LPC, GEN_PMCON_3); |
| |
| ps->prev_sleep_state = prev_sleep_state(ps); |
| |
| dump_power_state(ps); |
| |
| return ps; |
| } |