/*
 * File: HdaIo.h
 *
 * Copyright (c) 2018 John Davis
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _EFI_HDA_IO_H_
#define _EFI_HDA_IO_H_

#include <Uefi.h>
#include <Protocol/DevicePath.h>

//
// HDA I/O protocol.
//

// HDA I/O protocol GUID.
#define EFI_HDA_IO_PROTOCOL_GUID { \
    0xA090D7F9, 0xB50A, 0x4EA1, { 0xBD, 0xE9, 0x1A, 0xA5, 0xE9, 0x81, 0x2F, 0x45 } \
}
extern EFI_GUID gEfiHdaIoProtocolGuid;
typedef struct _EFI_HDA_IO_PROTOCOL EFI_HDA_IO_PROTOCOL;

// Type of stream
typedef enum {
    EfiHdaIoTypeInput = 0,
    EfiHdaIoTypeOutput,
    EfiHdaIoTypeMaximum
} EFI_HDA_IO_PROTOCOL_TYPE;

// Verb list structure.
typedef struct {
    UINT32 Count;
    UINT32 *Verbs ;
    UINT32 *Responses;
} EFI_HDA_IO_VERB_LIST;

// Callback function.
typedef
VOID
(EFIAPI* EFI_HDA_IO_STREAM_CALLBACK)(
    IN EFI_HDA_IO_PROTOCOL_TYPE Type,
    IN VOID *Context1,
    IN VOID *Context2,
    IN VOID *Context3);

/**
  Retrieves this codec's address.

  @param[in]  This              A pointer to the HDA_IO_PROTOCOL instance.
  @param[out] CodecAddress      The codec's address.

  @retval EFI_SUCCESS           The codec's address was returned.
  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HDA_IO_GET_ADDRESS)(
    IN  EFI_HDA_IO_PROTOCOL *This,
    OUT UINT8 *CodecAddress);

/**
  Sends a single command to the codec.

  @param[in]  This              A pointer to the HDA_IO_PROTOCOL instance.
  @param[in]  Node              The destination node.
  @param[in]  Verb              The verb to send.
  @param[out] Response          The response received.

  @retval EFI_SUCCESS           The verb was sent successfully and a response received.
  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HDA_IO_SEND_COMMAND)(
    IN  EFI_HDA_IO_PROTOCOL *This,
    IN  UINT8 Node,
    IN  UINT32 Verb,
    OUT UINT32 *Response);

/**
  Sends a set of commands to the codec.

  @param[in] This               A pointer to the HDA_IO_PROTOCOL instance.
  @param[in] Node               The destination node.
  @param[in] Verbs              The verbs to send. Responses will be delievered in the same list.

  @retval EFI_SUCCESS           The verbs were sent successfully and all responses received.
  @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_HDA_IO_SEND_COMMANDS)(
    IN EFI_HDA_IO_PROTOCOL *This,
    IN UINT8 Node,
    IN EFI_HDA_IO_VERB_LIST *Verbs);

typedef
EFI_STATUS
(EFIAPI *EFI_HDA_IO_SETUP_STREAM)(
    IN  EFI_HDA_IO_PROTOCOL *This,
    IN  EFI_HDA_IO_PROTOCOL_TYPE Type,
    IN  UINT16 Format,
    OUT UINT8 *StreamId);

typedef
EFI_STATUS
(EFIAPI *EFI_HDA_IO_CLOSE_STREAM)(
    IN EFI_HDA_IO_PROTOCOL *This,
    IN EFI_HDA_IO_PROTOCOL_TYPE Type);

typedef
EFI_STATUS
(EFIAPI *EFI_HDA_IO_GET_STREAM)(
    IN  EFI_HDA_IO_PROTOCOL *This,
    IN  EFI_HDA_IO_PROTOCOL_TYPE Type,
    OUT BOOLEAN *State);

typedef
EFI_STATUS
(EFIAPI *EFI_HDA_IO_START_STREAM)(
    IN EFI_HDA_IO_PROTOCOL *This,
    IN EFI_HDA_IO_PROTOCOL_TYPE Type,
    IN VOID *Buffer,
    IN UINTN BufferLength,
    IN UINTN BufferPosition OPTIONAL,
    IN EFI_HDA_IO_STREAM_CALLBACK Callback OPTIONAL,
    IN VOID *Context1 OPTIONAL,
    IN VOID *Context2 OPTIONAL,
    IN VOID *Context3 OPTIONAL);

typedef
EFI_STATUS
(EFIAPI *EFI_HDA_IO_STOP_STREAM)(
    IN EFI_HDA_IO_PROTOCOL *This,
    IN EFI_HDA_IO_PROTOCOL_TYPE Type);

// HDA I/O protocol structure.
struct _EFI_HDA_IO_PROTOCOL {
    EFI_HDA_IO_GET_ADDRESS      GetAddress;
    EFI_HDA_IO_SEND_COMMAND     SendCommand;
    EFI_HDA_IO_SEND_COMMANDS    SendCommands;
    EFI_HDA_IO_SETUP_STREAM     SetupStream;
    EFI_HDA_IO_CLOSE_STREAM     CloseStream;
    EFI_HDA_IO_GET_STREAM       GetStream;
    EFI_HDA_IO_START_STREAM     StartStream;
    EFI_HDA_IO_STOP_STREAM      StopStream;
};

//
// HDA I/O Device Path protocol.
//

// HDA I/O Device Path GUID.
#define EFI_HDA_IO_DEVICE_PATH_GUID { \
    0xA9003FEB, 0xD806, 0x41DB, { 0xA4, 0x91, 0x54, 0x05, 0xFE, 0xEF, 0x46, 0xC3 } \
}
extern EFI_GUID gEfiHdaIoDevicePathGuid;

// HDA I/O Device Path structure.
typedef struct {
    // Vendor-specific device path fields.
    EFI_DEVICE_PATH_PROTOCOL Header;
    EFI_GUID Guid;

    // Codec address.
    UINT8 Address;
} EFI_HDA_IO_DEVICE_PATH;

// Template for HDA I/O Device Path protocol.
#define EFI_HDA_IO_DEVICE_PATH_TEMPLATE { \
    { \
        MESSAGING_DEVICE_PATH, \
        MSG_VENDOR_DP, \
        { \
            (UINT8)(sizeof(EFI_HDA_IO_DEVICE_PATH)), \
            (UINT8)((sizeof(EFI_HDA_IO_DEVICE_PATH)) >> 8) \
        } \
    }, \
    gEfiHdaIoDevicePathGuid, \
    0 \
}

#endif
