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- /** @file
- Definition for supported EC commands.
- Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
- 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_
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