Fujitsu DTV/STB solution driver (FAPex driver) Documentation [V01L00R00]


AUDIO DECODER Driver

Table of Contents

Introduction
Configuration

Public Interface

Driver Usage
Driver Relationship
References

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Introduction

This driver controls the Audio Decoder block.

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Configuration

Firmware Memory Configuration


The memory configuration of Audio Decoder Firmware is defined with the board configuration header file.

In case of Fujitsu MB86H61 Development Kit board, this board configuration header file is "${KERNEL_TOP}/drivers/media/fapex/wfe/include/fapex/sys_config_mb86h61_devkit.h", it is defined as follows.
    
    #define PROGRAM_MEMORY_START                    DDR_MEMORY_START_1


    // Audio decoder memory´s location and size.
    #define FAPEX_SYS_MMAP_ARC_APPLICATION_START    ARC_PROGRAM_LOAD_ADDRESS
    #define FAPEX_SYS_MMAP_ARC_APPLICATION_BYTES    0x00400000UL // 4 MB

Note:
This mapping configuration value should depend on Audio Decoder Firmware used in your system.
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Public Interface

System Driver Interface

Driver initialization function

  • Linux:
    The AUDIO DECODER driver module is initialized by following command on target board.
     # modprobe fapex_fdlaudec
  • RTOS:
    The AUDIO DECODER driver module is initialized by calling FAPEX_common_init().

Driver exit function

  • Linux:
    The AUDIO DECODER driver module is unregistered by following command on target board.
     # modprobe -rq fapex_fdlaudec
  • RTOS:
    The AUDIO DECODER driver module is unregistered by calling FAPEX_common_exit().

Application Programming Interface

Functions and Macros

The driver provides the functions and macros listed below. For more information please follow the links to their detailed documentation.

Open Driver
FAPEX_AUDEC_Open()
Close Driver
FAPEX_AUDEC_Close()
I/O control of Driver
FAPEX_AUDEC_Ioctl()
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Driver Usage

Please refer to following sequence diagram for the usage of this driver.

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Driver Relationship

The AUDIO DECODER driver is related with the following drivers:

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References

  • MB86H61 Device Manual
    Chapter 19.Audio Decoder


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