1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 3 /* 4 * EC communication interface for QUANTA IT8518 Embedded Controller. 5 */ 6 7 #ifndef _EC_QUANTA_IT8518_EC_H 8 #define _EC_QUANTA_IT8518_EC_H 9 10 #define EC_IO 0x100 /* Mainboard specific. Could be Kconfig option */ 11 #define EC_IO_HIGH EC_IO + 1 12 #define EC_IO_LOW EC_IO + 2 13 #define EC_IO_DATA EC_IO + 3 14 15 /* Wait 400ms for keyboard controller answers */ 16 #define KBC_TIMEOUT_IN_MS 400 17 18 // 60h/64h Command Interface 19 #define KBD_DATA 0x60 20 #define KBD_COMMAND 0x64 21 #define KBD_STATUS 0x64 22 #define KBD_IBF (1 << 1) // 1: input buffer full (data ready for ec) 23 #define KBD_OBF (1 << 0) // 1: output buffer full (data ready for host) 24 25 #define EC_KBD_SMI_EVENT 0xCD 26 #define EC_KBD_CMD_UNMUTE 0xE8 27 #define EC_KBD_CMD_MUTE 0xE9 28 29 u8 ec_kbc_read_ob(void); 30 void ec_kbc_write_cmd(u8 cmd); 31 void ec_kbc_write_ib(u8 data); 32 33 // 62h/66h Command Interface 34 #define EC_DATA 0x62 35 #define EC_SC 0x66 // Status & Control Register 36 #define SMI_EVT (1 << 6) // 1: SMI event was triggered 37 #define SCI_EVT (1 << 5) // 1: SCI event was triggered 38 39 // EC Commands (defined in ec_function_spec v3.12) 40 #define RD_EC 0x80 41 #define WR_EC 0x81 42 #define QR_EC 0x84 43 44 #define EC_CMD_EXIT_BOOT_BLOCK 0x85 45 #define EC_CMD_NOTIFY_ACPI_ENTER 0x86 46 #define EC_CMD_NOTIFY_ACPI_EXIT 0x87 47 #define EC_CMD_WARM_RESET 0x8C 48 49 // ECRAM Offsets 50 #define EC_PERIPH_CNTL_3 0x0D 51 #define EC_USB_S3_EN 0x26 52 #define EC_PERIPH_STAT_3 0x35 53 #define EC_THERM_0 0x78 54 #define EC_WAKE_SRC_ENABLE 0xBF 55 #define EC_FW_VER 0xE8 // 2 Bytes 56 #define EC_IF_MIN_VER 0xEB 57 #define EC_STATUS_REG 0xEC 58 #define EC_IF_MAJ_VER 0xEF 59 #define EC_MBAT_STATUS 0x0138 60 61 // EC 0.83b added status bits: 62 // BIT0=EC in RO mode 63 // BIT1=Recovery Key Sequence Detected 64 #define EC_IN_RO_MODE 0x1 65 #define EC_IN_RECOVERY_MODE 0x3 66 67 // EC 0.86a added enable bit: 68 #define EC_LID_WAKE_ENABLE 0x4 69 70 u8 ec_read_ob(void); 71 void ec_write_cmd(u8 cmd); 72 void ec_write_ib(u8 data); 73 74 u8 ec_read(u16 addr); 75 void ec_write(u16 addr, u8 data); 76 u8 ec_it8518_get_event(void); 77 void ec_it8518_enable_wake_events(void); 78 79 #endif /* _EC_QUANTA_IT8518_EC_H */ 80