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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
/*
* EC communication interface for QUANTA IT8518 Embedded Controller.
*/
#ifndef _EC_QUANTA_IT8518_EC_H
#define _EC_QUANTA_IT8518_EC_H
#define EC_IO 0x100 /* Mainboard specific. Could be Kconfig option */
#define EC_IO_HIGH EC_IO + 1
#define EC_IO_LOW EC_IO + 2
#define EC_IO_DATA EC_IO + 3
/* Wait 400ms for keyboard controller answers */
#define KBC_TIMEOUT_IN_MS 400
// 60h/64h Command Interface
#define KBD_DATA 0x60
#define KBD_COMMAND 0x64
#define KBD_STATUS 0x64
#define KBD_IBF (1 << 1) // 1: input buffer full (data ready for ec)
#define KBD_OBF (1 << 0) // 1: output buffer full (data ready for host)
#define EC_KBD_SMI_EVENT 0xCD
#define EC_KBD_CMD_UNMUTE 0xE8
#define EC_KBD_CMD_MUTE 0xE9
u8 ec_kbc_read_ob(void);
void ec_kbc_write_cmd(u8 cmd);
void ec_kbc_write_ib(u8 data);
// 62h/66h Command Interface
#define EC_DATA 0x62
#define EC_SC 0x66 // Status & Control Register
#define SMI_EVT (1 << 6) // 1: SMI event was triggered
#define SCI_EVT (1 << 5) // 1: SCI event was triggered
// EC Commands (defined in ec_function_spec v3.12)
#define RD_EC 0x80
#define WR_EC 0x81
#define QR_EC 0x84
#define EC_CMD_EXIT_BOOT_BLOCK 0x85
#define EC_CMD_NOTIFY_ACPI_ENTER 0x86
#define EC_CMD_NOTIFY_ACPI_EXIT 0x87
#define EC_CMD_WARM_RESET 0x8C
// ECRAM Offsets
#define EC_PERIPH_CNTL_3 0x0D
#define EC_USB_S3_EN 0x26
#define EC_PERIPH_STAT_3 0x35
#define EC_THERM_0 0x78
#define EC_WAKE_SRC_ENABLE 0xBF
#define EC_FW_VER 0xE8 // 2 Bytes
#define EC_IF_MIN_VER 0xEB
#define EC_STATUS_REG 0xEC
#define EC_IF_MAJ_VER 0xEF
#define EC_MBAT_STATUS 0x0138
// EC 0.83b added status bits:
// BIT0=EC in RO mode
// BIT1=Recovery Key Sequence Detected
#define EC_IN_RO_MODE 0x1
#define EC_IN_RECOVERY_MODE 0x3
// EC 0.86a added enable bit:
#define EC_LID_WAKE_ENABLE 0x4
u8 ec_read_ob(void);
void ec_write_cmd(u8 cmd);
void ec_write_ib(u8 data);
u8 ec_read(u16 addr);
void ec_write(u16 addr, u8 data);
u8 ec_it8518_get_event(void);
void ec_it8518_enable_wake_events(void);
#endif /* _EC_QUANTA_IT8518_EC_H */
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