diff options
author | Angel Pons <th3fanbus@gmail.com> | 2020-10-23 21:37:21 +0200 |
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committer | Angel Pons <th3fanbus@gmail.com> | 2020-10-30 00:45:51 +0000 |
commit | c200e8c7cdebed98860a771888efbf998c5912b3 (patch) | |
tree | 2a3d0151583646b33a5ba6e518c23e403433be85 /src/soc/intel/broadwell/pch/power_state.c | |
parent | 3cc2c38d50741fffb9193851a4a3b7c636f7cd4d (diff) |
soc/intel/broadwell: Move PCH code into pch subdir
Change-Id: Icb57eb89b4f225298e43ae27970dc1e27fb6e222
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46706
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/broadwell/pch/power_state.c')
-rw-r--r-- | src/soc/intel/broadwell/pch/power_state.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/pch/power_state.c b/src/soc/intel/broadwell/pch/power_state.c new file mode 100644 index 0000000000..cb1d3e5b9c --- /dev/null +++ b/src/soc/intel/broadwell/pch/power_state.c @@ -0,0 +1,111 @@ +/* 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)); +} +ROMSTAGE_CBMEM_INIT_HOOK(migrate_power_state) + +/* Return 0, 3, or 5 to indicate the previous sleep state. */ +static int prev_sleep_state(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; +} |