Hannah Williams (hannah.williams@intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/14289
-gerrit
commit 9abde3a7f85bf42571483d1edb5b83498427b0ac Author: Hannah Williams hannah.williams@intel.com Date: Thu Feb 4 20:13:34 2016 -0800
soc/apollolake: Add Helper functions to access Power Management Registers
Change-Id: I928efea33030e03cbbaead6812c617d20446f7c9 Signed-off-by: Hannah Williams hannah.williams@intel.com --- src/soc/intel/apollolake/Makefile.inc | 3 + src/soc/intel/apollolake/include/soc/pm.h | 93 +++++++- src/soc/intel/apollolake/pmutil.c | 358 ++++++++++++++++++++++++++++++ 3 files changed, 449 insertions(+), 5 deletions(-)
diff --git a/src/soc/intel/apollolake/Makefile.inc b/src/soc/intel/apollolake/Makefile.inc index 70ab515..8f2960d 100644 --- a/src/soc/intel/apollolake/Makefile.inc +++ b/src/soc/intel/apollolake/Makefile.inc @@ -25,8 +25,10 @@ romstage-y += gpio.c romstage-$(CONFIG_SOC_UART_DEBUG) += uart_early.c romstage-y += memmap.c romstage-y += mmap_boot.c +romstage-y += pmutil.c
smm-y += placeholders.c +smm-y += pmutil.c
ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c ramstage-y += cpu.c @@ -38,6 +40,7 @@ ramstage-y += memmap.c ramstage-y += mmap_boot.c ramstage-y += uart.c ramstage-y += northbridge.c +ramstage-y += pmutil.c
postcar-y += exit_car.S postcar-y += memmap.c diff --git a/src/soc/intel/apollolake/include/soc/pm.h b/src/soc/intel/apollolake/include/soc/pm.h index 286406b..1b68fc5 100644 --- a/src/soc/intel/apollolake/include/soc/pm.h +++ b/src/soc/intel/apollolake/include/soc/pm.h @@ -1,7 +1,7 @@ /* * This file is part of the coreboot project. * - * Copyright (C) 2016 Intel Corp. + * Copyright (C) 2015 Intel Corp. * (Written by Lance Zhao lijian.zhao@intel.com for Intel Corp.) * * This program is free software; you can redistribute it and/or modify @@ -13,19 +13,102 @@ #ifndef _SOC_APOLLOLAKE_PM_H_ #define _SOC_APOLLOLAKE_PM_H_
-/* ACPI_BASE_ADDRESS / PMBASE */ +/* ACPI_BASE_ADDRESS */
#define PM1_STS 0x00 +#define WAK_STS (1 << 15) +#define PWRBTN_STS (1 << 8) + #define PM1_EN 0x02 +#define PCIEXPWAK_DIS (1 << 14) +#define USB_WAKE_EN (1 << 13) +#define RTC_EN (1 << 10) +#define PWRBTN_EN (1 << 8) +#define GBL_EN (1 << 5) +#define TMROF_EN (1 << 0) + #define PM1_CNT 0x04 +#define SLP_EN (1 << 13) +#define SLP_TYP_SHIFT 10 +#define SLP_TYP (7 << SLP_TYP_SHIFT) +#define SLP_TYP_S0 0 +#define SLP_TYP_S3 5 +#define SLP_TYP_S4 6 +#define SLP_TYP_S5 7 +#define SCI_EN (1 << 0) + #define PM1_TMR 0x08 #define SMI_EN 0x40 +#define USB_EN (1 << 17) /* Legacy USB2 SMI logic */ +#define PERIODIC_EN (1 << 14) /* SMI on PERIODIC_STS in SMI_STS */ +#define TCO_EN (1 << 13) /* Enable TCO Logic (BIOSWE et al) */ +#define BIOS_RLS (1 << 7) /* asserts SCI on bit set */ +#define SWSMI_TMR_EN (1 << 6) /* start software smi timer on bit set */ +#define APMC_EN (1 << 5) /* Writes to APM_CNT cause SMI# */ +#define SLP_SMI_EN (1 << 4) /* Write to SLP_EN in PM1_CNT asserts SMI# */ +#define BIOS_EN (1 << 2) /* Assert SMI# on setting GBL_RLS bit */ +#define EOS (1 << 1) /* End of SMI (deassert SMI#) */ +#define GBL_SMI_EN (1 << 0) /* SMI# generation at all? */ + #define SMI_STS 0x44 #define GPE_CNTL 0x50 #define DEVACT_STS 0x4c +#define TCO_STS 0x64 +#define TCO_TIMEOUT (1 << 3) +#define TCO1_CNT 0x68
#define GPE0_REG_MAX 4 -#define GPE0_STS(x) (0x20 + (x * 4)) -#define GPE0_EN(x) (0x30 + (x * 4)) +#define GPE0_REG_SIZE 32 +#define GPE0_STS(x) (0x20 + (x * 4)) +#define GPE0_EN(x) (0x30 + (x * 4)) +#define PME_B0_EN (1 << 13) + + + +/* Memory mapped IO registers behind PMC_BASE_ADDRESS */ +#define PRSTS 0x1000 +#define GEN_PMCON1 0x1020 +# define PWR_FLR (1 << 16) +# define SUS_PWR_FLR (1 << 14) +#define GEN_PMCON2 0x1024 +# define RPS (1 << 2) + +/* Generic sleep state types */ +#define SLEEP_STATE_S0 0 +#define SLEEP_STATE_S3 3 +#define SLEEP_STATE_S5 5 + +/* Track power state from reset to log events. */ +struct chipset_power_state { + uint16_t pm1_sts; + uint16_t pm1_en; + uint32_t pm1_cnt; + uint32_t gpe0_sts; + uint32_t gpe0_en; + uint32_t tco_sts; + uint32_t prsts; + uint32_t gen_pmcon1; + uint32_t gen_pmcon2; + int prev_sleep_state; +} __attribute__((packed)); + +int fill_power_state(struct chipset_power_state *ps); +int chipset_prev_sleep_state(struct chipset_power_state *ps); + +/* Power Management Utility Functions. */ +uint32_t clear_smi_status(void); +uint16_t clear_pm1_status(void); +uint32_t clear_tco_status(void); +uint32_t clear_gpe_status(void); +uint32_t clear_alt_status(void); +void clear_pmc_status(void); +void enable_smi(uint32_t mask); +void disable_smi(uint32_t mask); +void enable_pm1(uint16_t events); +void enable_pm1_control(uint32_t mask); +void disable_pm1_control(uint32_t mask); +void enable_gpe(uint32_t mask); +void disable_gpe(uint32_t mask); +void disable_all_gpe(void);
-#endif /* _SOC_APOLLOLAKE_PM_H_ */ +#endif diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c new file mode 100644 index 0000000..f618b81 --- /dev/null +++ b/src/soc/intel/apollolake/pmutil.c @@ -0,0 +1,358 @@ +/* + * 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. + */ + +#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 <stdint.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", + [4] = "SLP_SMI", + [5] = "APM", + [6] = "SWSMI_TMR", + [8] = "PM1", + [9] = "GPE0", + [10]= "GPIO_SMI", + [12] = "MCSMI", + [13] = "TCO", + [14] = "PERIODIC", + [15] = "SERIRQ", + [16] = "SMBUS_SMI", + [17] = "XHCI", + [18] = "HOST_SMBUS", + [19] = "SCS", + [20] = "PCI_EXP_SMI", + [26] = "SPI", + }; + + if (!smi_sts) + return 0; + + printk(BIOS_DEBUG, "SMI_STS: "); + print_num_status_bits(27, 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()); +} + +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(16, 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(18, 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 gpe0_en = inl(ACPI_PMIO_BASE + GPE0_EN(0)); + gpe0_en |= mask; + outl(gpe0_en, ACPI_PMIO_BASE + GPE0_EN(0)); +} + +void disable_gpe(uint32_t mask) +{ + uint32_t gpe0_en = inl(ACPI_PMIO_BASE + GPE0_EN(0)); + gpe0_en &= ~mask; + outl(gpe0_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[] = { + [1] = "HOTPLUG", + [2] = "SWGPE", + [3] = "PCIE_WAKE0", + [4] = "PUNIT", + [5] = "GUNIT", + [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(18, 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()); +} + +static uint32_t reset_alt_status(void) +{ + return 0; +} + +static uint32_t print_alt_sts(uint32_t alt_gpio_smi) +{ + uint32_t alt_gpio_sts; + static const char * const alt_gpio_smi_sts_bits[] = { + [0] = "SUS_GPIO_0", + [1] = "SUS_GPIO_1", + [2] = "SUS_GPIO_2", + [3] = "SUS_GPIO_3", + [4] = "SUS_GPIO_4", + [5] = "SUS_GPIO_5", + [6] = "SUS_GPIO_6", + [7] = "SUS_GPIO_7", + [8] = "CORE_GPIO_0", + [9] = "CORE_GPIO_1", + [10] = "CORE_GPIO_2", + [11] = "CORE_GPIO_3", + [12] = "CORE_GPIO_4", + [13] = "CORE_GPIO_5", + [14] = "CORE_GPIO_6", + [15] = "CORE_GPIO_7", + }; + + /* Status bits are in the upper 16 bits. */ + alt_gpio_sts = alt_gpio_smi >> 16; + if (!alt_gpio_sts) + return alt_gpio_smi; + + printk(BIOS_DEBUG, "ALT_GPIO_SMI: "); + print_num_status_bits(16, alt_gpio_sts, alt_gpio_smi_sts_bits); + printk(BIOS_DEBUG, "\n"); + + return alt_gpio_smi; +} + +uint32_t clear_alt_status(void) +{ + return print_alt_sts(reset_alt_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; + } + + /* Clear SLP_TYP. */ + outl(ps->pm1_cnt & ~(SLP_TYP), ACPI_PMIO_BASE + PM1_CNT); + } + + + return prev_sleep_state; +} + +/* returns prev_sleep_state */ +int fill_power_state(struct chipset_power_state *ps) +{ + 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->gpe0_sts = inl(ACPI_PMIO_BASE + GPE0_STS(0)); + ps->gpe0_en = inl(ACPI_PMIO_BASE + GPE0_EN(0)); + 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->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, "gpe0_sts: %08x gpe0_en: %08x tco_sts: %08x\n", + ps->gpe0_sts, ps->gpe0_en, ps->tco_sts); + printk(BIOS_DEBUG, "prsts: %08x gen_pmcon1: %08x gen_pmcon2: %08x\n", + ps->prsts, ps->gen_pmcon1, ps->gen_pmcon2); + printk(BIOS_DEBUG, "prev_sleep_state %d\n", ps->prev_sleep_state); + printk(BIOS_DEBUG, "smi_en: %08x smi_sts: %08x\n", + inl(ACPI_PMIO_BASE + SMI_EN), inl(ACPI_PMIO_BASE + SMI_STS)); + return ps->prev_sleep_state; +}