/*
 *
 * Intel Management Engine Interface (Intel MEI) Linux driver
 * Copyright (c) 2003-2012, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */

#ifndef _MEI_HW_TYPES_H_
#define _MEI_HW_TYPES_H_

#include <linux/uuid.h>

/*
 * Timeouts in Seconds
 */
#define MEI_HW_READY_TIMEOUT        2  /* Timeout on ready message */
#define MEI_CONNECT_TIMEOUT         3  /* HPS: at least 2 seconds */

#define MEI_CL_CONNECT_TIMEOUT     15  /* HPS: Client Connect Timeout */
#define MEI_CLIENTS_INIT_TIMEOUT   15  /* HPS: Clients Enumeration Timeout */

#define MEI_IAMTHIF_STALL_TIMER    12  /* HPS */
#define MEI_IAMTHIF_READ_TIMER     10  /* HPS */

#define MEI_HBM_TIMEOUT            1   /* 1 second */

/*
 * MEI Version
 */
#define HBM_MINOR_VERSION                   0
#define HBM_MAJOR_VERSION                   1

/* Host bus message command opcode */
#define MEI_HBM_CMD_OP_MSK                  0x7f
/* Host bus message command RESPONSE */
#define MEI_HBM_CMD_RES_MSK                 0x80

/*
 * MEI Bus Message Command IDs
 */
#define HOST_START_REQ_CMD                  0x01
#define HOST_START_RES_CMD                  0x81

#define HOST_STOP_REQ_CMD                   0x02
#define HOST_STOP_RES_CMD                   0x82

#define ME_STOP_REQ_CMD                     0x03

#define HOST_ENUM_REQ_CMD                   0x04
#define HOST_ENUM_RES_CMD                   0x84

#define HOST_CLIENT_PROPERTIES_REQ_CMD      0x05
#define HOST_CLIENT_PROPERTIES_RES_CMD      0x85

#define CLIENT_CONNECT_REQ_CMD              0x06
#define CLIENT_CONNECT_RES_CMD              0x86

#define CLIENT_DISCONNECT_REQ_CMD           0x07
#define CLIENT_DISCONNECT_RES_CMD           0x87

#define MEI_FLOW_CONTROL_CMD                0x08

/*
 * MEI Stop Reason
 * used by hbm_host_stop_request.reason
 */
enum mei_stop_reason_types {
	DRIVER_STOP_REQUEST = 0x00,
	DEVICE_D1_ENTRY = 0x01,
	DEVICE_D2_ENTRY = 0x02,
	DEVICE_D3_ENTRY = 0x03,
	SYSTEM_S1_ENTRY = 0x04,
	SYSTEM_S2_ENTRY = 0x05,
	SYSTEM_S3_ENTRY = 0x06,
	SYSTEM_S4_ENTRY = 0x07,
	SYSTEM_S5_ENTRY = 0x08
};

/*
 * Client Connect Status
 * used by hbm_client_connect_response.status
 */
enum mei_cl_connect_status {
	MEI_CL_CONN_SUCCESS          = 0x00,
	MEI_CL_CONN_NOT_FOUND        = 0x01,
	MEI_CL_CONN_ALREADY_STARTED  = 0x02,
	MEI_CL_CONN_OUT_OF_RESOURCES = 0x03,
	MEI_CL_CONN_MESSAGE_SMALL    = 0x04
};

/*
 * Client Disconnect Status
 */
enum  mei_cl_disconnect_status {
	MEI_CL_DISCONN_SUCCESS = 0x00
};

/*
 *  MEI BUS Interface Section
 */
struct mei_msg_hdr {
	u32 me_addr:8;
	u32 host_addr:8;
	u32 length:9;
	u32 reserved:5;
	u32 internal:1;
	u32 msg_complete:1;
} __packed;


struct mei_bus_message {
	u8 hbm_cmd;
	u8 data[0];
} __packed;

/**
 * struct hbm_cl_cmd - client specific host bus command
 *	CONNECT, DISCONNECT, and FlOW CONTROL
 *
 * @hbm_cmd - bus message command header
 * @me_addr - address of the client in ME
 * @host_addr - address of the client in the driver
 * @data
 */
struct mei_hbm_cl_cmd {
	u8 hbm_cmd;
	u8 me_addr;
	u8 host_addr;
	u8 data;
};

struct hbm_version {
	u8 minor_version;
	u8 major_version;
} __packed;

struct hbm_host_version_request {
	u8 hbm_cmd;
	u8 reserved;
	struct hbm_version host_version;
} __packed;

struct hbm_host_version_response {
	u8 hbm_cmd;
	u8 host_version_supported;
	struct hbm_version me_max_version;
} __packed;

struct hbm_host_stop_request {
	u8 hbm_cmd;
	u8 reason;
	u8 reserved[2];
} __packed;

struct hbm_host_stop_response {
	u8 hbm_cmd;
	u8 reserved[3];
} __packed;

struct hbm_me_stop_request {
	u8 hbm_cmd;
	u8 reason;
	u8 reserved[2];
} __packed;

struct hbm_host_enum_request {
	u8 hbm_cmd;
	u8 reserved[3];
} __packed;

struct hbm_host_enum_response {
	u8 hbm_cmd;
	u8 reserved[3];
	u8 valid_addresses[32];
} __packed;

struct mei_client_properties {
	uuid_le protocol_name;
	u8 protocol_version;
	u8 max_number_of_connections;
	u8 fixed_address;
	u8 single_recv_buf;
	u32 max_msg_length;
} __packed;

struct hbm_props_request {
	u8 hbm_cmd;
	u8 address;
	u8 reserved[2];
} __packed;


struct hbm_props_response {
	u8 hbm_cmd;
	u8 address;
	u8 status;
	u8 reserved[1];
	struct mei_client_properties client_properties;
} __packed;

/**
 * struct hbm_client_connect_request - connect/disconnect request
 *
 * @hbm_cmd - bus message command header
 * @me_addr - address of the client in ME
 * @host_addr - address of the client in the driver
 * @reserved
 */
struct hbm_client_connect_request {
	u8 hbm_cmd;
	u8 me_addr;
	u8 host_addr;
	u8 reserved;
} __packed;

/**
 * struct hbm_client_connect_response - connect/disconnect response
 *
 * @hbm_cmd - bus message command header
 * @me_addr - address of the client in ME
 * @host_addr - address of the client in the driver
 * @status - status of the request
 */
struct hbm_client_connect_response {
	u8 hbm_cmd;
	u8 me_addr;
	u8 host_addr;
	u8 status;
} __packed;


#define MEI_FC_MESSAGE_RESERVED_LENGTH           5

struct hbm_flow_control {
	u8 hbm_cmd;
	u8 me_addr;
	u8 host_addr;
	u8 reserved[MEI_FC_MESSAGE_RESERVED_LENGTH];
} __packed;


#endif
