mirror of
https://github.com/AsahiLinux/u-boot
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185f812c41
Sphinx expects Return: and not @return to indicate a return value.
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Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2017, Bin Meng <bmeng.cn@gmail.com>
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*/
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#ifndef __ASM_ACPI_S3_H__
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#define __ASM_ACPI_S3_H__
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#define WAKEUP_BASE 0x600
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/* PM1_STATUS register */
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#define WAK_STS (1 << 15)
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#define PCIEXPWAK_STS (1 << 14)
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#define RTC_STS (1 << 10)
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#define SLPBTN_STS (1 << 9)
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#define PWRBTN_STS (1 << 8)
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#define GBL_STS (1 << 5)
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#define BM_STS (1 << 4)
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#define TMR_STS (1 << 0)
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/* PM1_CNT register */
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#define SLP_EN (1 << 13)
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#define SLP_TYP_SHIFT 10
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#define SLP_TYP (7 << SLP_TYP_SHIFT)
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#define SLP_TYP_S0 0
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#define SLP_TYP_S1 1
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#define SLP_TYP_S3 5
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#define SLP_TYP_S4 6
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#define SLP_TYP_S5 7
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/* PM1_STS register */
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#define RTC_EN BIT(10)
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#define PWRBTN_EN BIT(8)
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/* Memory size reserved for S3 resume */
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#define S3_RESERVE_SIZE 0x1000
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#ifndef __ASSEMBLY__
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extern char __wakeup[];
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extern int __wakeup_size;
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enum acpi_sleep_state {
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ACPI_S0,
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ACPI_S1,
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ACPI_S2,
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ACPI_S3,
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ACPI_S4,
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ACPI_S5,
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};
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/**
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* acpi_ss_string() - get ACPI-defined sleep state string
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*
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* @pm1_cnt: ACPI-defined sleep state
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* @return: a pointer to the sleep state string.
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*/
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static inline char *acpi_ss_string(enum acpi_sleep_state state)
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{
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char *ss_string[] = { "S0", "S1", "S2", "S3", "S4", "S5"};
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return ss_string[state];
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}
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/**
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* acpi_sleep_from_pm1() - get ACPI-defined sleep state from PM1_CNT register
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*
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* @pm1_cnt: PM1_CNT register value
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* @return: ACPI-defined sleep state if given valid PM1_CNT register value,
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* -EINVAL otherwise.
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*/
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static inline enum acpi_sleep_state acpi_sleep_from_pm1(u32 pm1_cnt)
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{
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switch ((pm1_cnt & SLP_TYP) >> SLP_TYP_SHIFT) {
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case SLP_TYP_S0:
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return ACPI_S0;
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case SLP_TYP_S1:
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return ACPI_S1;
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case SLP_TYP_S3:
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return ACPI_S3;
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case SLP_TYP_S4:
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return ACPI_S4;
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case SLP_TYP_S5:
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return ACPI_S5;
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}
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return -EINVAL;
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}
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/**
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* chipset_prev_sleep_state() - Get chipset previous sleep state
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*
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* This returns chipset previous sleep state from ACPI registers.
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* Platform codes must supply this routine in order to support ACPI S3.
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*
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* Return: ACPI_S0/S1/S2/S3/S4/S5.
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*/
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enum acpi_sleep_state chipset_prev_sleep_state(void);
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/**
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* chipset_clear_sleep_state() - Clear chipset sleep state
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*
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* This clears chipset sleep state in ACPI registers.
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* Platform codes must supply this routine in order to support ACPI S3.
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*/
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void chipset_clear_sleep_state(void);
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struct acpi_fadt;
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/**
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* acpi_resume() - Do ACPI S3 resume
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*
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* This calls U-Boot wake up assembly stub and jumps to OS's wake up vector.
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*
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* @fadt: FADT table pointer in the ACPI table
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* @return: Never returns
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*/
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void acpi_resume(struct acpi_fadt *fadt);
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/**
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* acpi_s3_reserve() - Reserve memory for ACPI S3 resume
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*
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* This copies memory where real mode interrupt handler stubs reside to the
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* reserved place on the stack.
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*
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* This routine should be called by reserve_arch() before U-Boot is relocated
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* when ACPI S3 resume is enabled.
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*
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* @return: 0 always
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*/
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int acpi_s3_reserve(void);
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_ACPI_S3_H__ */
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