tech

用于三星S3C2440A和S3C24A0A的VGA或SXGA驱动程序

2004 (C) Samsung Electronics
Author :SW.LEE <[e-mail]>


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Hardware/Software Environment
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Target CPU : S3C2440A/S3C24A0
ImageSensor: S5X532 Samsung Camera 


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Software Architecture
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There is two kind version :
           General Character Device Driver and V4L2 Device Driver
           the souce code having V4L2 relation taken from 2.6 kernel & v4l2 patch.

Filename: videodev.c
          videodev.c is smiliar one of  V4L2 videodec.c
          and providing the multiplexing and multiple open/close

Filename :camif.c
          camif.c is direct interface to S3C24XX Camera Inferface


Figure:

          User Side (Open /dev/preview or /dev/codec)
            |
____________|__________________________________________________
            |
            |
            |
          videodev.c (one device interface): 
               \        : choose /dev/preview or /dev/codec
                \
          video_driver.c ( two minor device interface )
               \       \
                \       \
         v42api.c   sharpapi.c (Sharp Zaurus Inteface )
               \         \
                \         \
                 \_________\________________________________________
                  \         \                     \                  \
                   \         \                     \                  \          
                    \         \                     \    image sensor  \
          camif.c  ( S3C2440A/S3C24A0 Hardware)      \                  \
                                                      \                  \
                                                    ov7620            s5x532

Filename : videodev.c
1. Purpose :
        registered the MISC driver.  
        (module driver)

Filename : vide-driver.c 
        camera driver module 
        (module driver)

Filename : camif.c
         camera HW API library (object file)

Filename : imgsensor.c(s5x532)
          i2c client device dirver 
          (module driver)

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ETC
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           1. register video device (Ref source file: drivers/char/wdt.c )
                misc register -- two minor device
                video_register_device
                CODEC_MINOR = 212
                PREVIEW_MINOR = 213
           2. Image Convert Function Point
                (16bit Interface must be inserted for S3C24A0)
              format defined.--> camif_get_frame()

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Todo List
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