1 /* 2 * Copyright (C) 2017, Bin Meng <bmeng.cn@gmail.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #ifndef __ASM_ACPI_S3_H__ 8 #define __ASM_ACPI_S3_H__ 9 10 #define WAKEUP_BASE 0x600 11 12 /* PM1_STATUS register */ 13 #define WAK_STS (1 << 15) 14 #define PCIEXPWAK_STS (1 << 14) 15 #define RTC_STS (1 << 10) 16 #define SLPBTN_STS (1 << 9) 17 #define PWRBTN_STS (1 << 8) 18 #define GBL_STS (1 << 5) 19 #define BM_STS (1 << 4) 20 #define TMR_STS (1 << 0) 21 22 /* PM1_CNT register */ 23 #define SLP_EN (1 << 13) 24 #define SLP_TYP_SHIFT 10 25 #define SLP_TYP (7 << SLP_TYP_SHIFT) 26 #define SLP_TYP_S0 0 27 #define SLP_TYP_S1 1 28 #define SLP_TYP_S3 5 29 #define SLP_TYP_S4 6 30 #define SLP_TYP_S5 7 31 32 #ifndef __ASSEMBLY__ 33 34 extern char __wakeup[]; 35 extern int __wakeup_size; 36 37 enum acpi_sleep_state { 38 ACPI_S0, 39 ACPI_S1, 40 ACPI_S2, 41 ACPI_S3, 42 ACPI_S4, 43 ACPI_S5, 44 }; 45 46 /** 47 * acpi_ss_string() - get ACPI-defined sleep state string 48 * 49 * @pm1_cnt: ACPI-defined sleep state 50 * @return: a pointer to the sleep state string. 51 */ 52 static inline char *acpi_ss_string(enum acpi_sleep_state state) 53 { 54 char *ss_string[] = { "S0", "S1", "S2", "S3", "S4", "S5"}; 55 56 return ss_string[state]; 57 } 58 59 /** 60 * acpi_sleep_from_pm1() - get ACPI-defined sleep state from PM1_CNT register 61 * 62 * @pm1_cnt: PM1_CNT register value 63 * @return: ACPI-defined sleep state if given valid PM1_CNT register value, 64 * -EINVAL otherwise. 65 */ 66 static inline enum acpi_sleep_state acpi_sleep_from_pm1(u32 pm1_cnt) 67 { 68 switch ((pm1_cnt & SLP_TYP) >> SLP_TYP_SHIFT) { 69 case SLP_TYP_S0: 70 return ACPI_S0; 71 case SLP_TYP_S1: 72 return ACPI_S1; 73 case SLP_TYP_S3: 74 return ACPI_S3; 75 case SLP_TYP_S4: 76 return ACPI_S4; 77 case SLP_TYP_S5: 78 return ACPI_S5; 79 } 80 81 return -EINVAL; 82 } 83 84 /** 85 * chipset_prev_sleep_state() - Get chipset previous sleep state 86 * 87 * This returns chipset previous sleep state from ACPI registers. 88 * Platform codes must supply this routine in order to support ACPI S3. 89 * 90 * @return ACPI_S0/S1/S2/S3/S4/S5. 91 */ 92 enum acpi_sleep_state chipset_prev_sleep_state(void); 93 94 /** 95 * chipset_clear_sleep_state() - Clear chipset sleep state 96 * 97 * This clears chipset sleep state in ACPI registers. 98 * Platform codes must supply this routine in order to support ACPI S3. 99 */ 100 void chipset_clear_sleep_state(void); 101 102 #endif /* __ASSEMBLY__ */ 103 104 #endif /* __ASM_ACPI_S3_H__ */ 105