/** @file Definition for supported EC commands. Copyright (c) 2019, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent **/ #ifndef EC_COMMANDS_H_ #define EC_COMMANDS_H_ // // Timeout if EC command/data fails // #define EC_TIME_OUT 0x20000 // // The EC implements an embedded controller interface at ports 0x60/0x64 and a ACPI compliant // system management controller at ports 0x62/0x66. Port 0x66 is the command and status port, // port 0x62 is the data port. // #define EC_D_PORT 0x62 #define EC_C_PORT 0x66 // // Status Port 0x62 // // FIXME: Some bits may be reserved #define EC_S_OVR_TMP 0x80 // Current CPU temperature exceeds the threshold #define EC_S_SMI_EVT 0x40 // SMI event is pending #define EC_S_SCI_EVT 0x20 // SCI event is pending #define EC_S_BURST 0x10 // EC is in burst mode or normal mode #define EC_S_CMD 0x08 // Byte in data register is command/data #define EC_S_IGN 0x04 // Ignored #define EC_S_IBF 0x02 // Input buffer is full/empty #define EC_S_OBF 0x01 // Output buffer is full/empty // // EC commands that are issued to the EC through the command port (0x66). // New commands and command parameters should only be written by the host when IBF=0. // Data read from the EC data port is valid only when OBF=1. // // TODO: It's unclear if the EC has such a command. Currently, we read model ID from ADCs. // As a definition is required for build, use a known safe command: EC query will do nicely. #define EC_C_FAB_ID 0x84 // Get the board fab ID in the lower 3 bits #define EC_C_ACPI_READ 0x80 // Read a byte of EC RAM #define EC_C_ACPI_WRITE 0x81 // Write a byte of EC RAM #endif // EC_COMMANDS_H_