Hi,
This RFC provides high level design/changes for supporting
Multi-Media/Mass-Market/Mistral/Customer Daughter card based on OMAP3 EVM.
Background
==========
OMAP3 EVM doesn't support camera interface, TI and Mistral has developed
Daughter card on top of OMAP3 EVM which will add support for
- TVP5146 decoder, providing BT656 capture support through
S-Video/Component/Composite input.
- Camera/sensor interface (Micron)
- HSUSB Transceiver USB-83320
Soon the block-diagram, schematics and other details will be available publicly.
Hardware Block Diagram
======================
Below is top level block diagram for the OMAP3 EVM Multi-Media Daughter Card -
OMAP 3 Processor Multi-Media Daughter Card
Board
- - - - - - - - - - - - - -- - - - - - - - - - - - - -
| OMAP3530 | | - - - - - - <------O S-Vid |
| | | | | |
| I2C |------------------------>| | |O| |
| | | | |<-----|O|Compo |
| | | /| | Video | |O|site |
| | | | | | Decoder | |
| | | | |<-----| TVP5146 | |O| |
| Camera | | | | - - - - - - <-----|O|Compo |
| interface|<---------------| | |O|nent |
| | | | | - - - - - - |
| | | | |<-----| | |
| | | | | | Micron | |
| | | | | | Image | |
| | | \| | Sensor | |
| I2C |------------------------>| | |
| | | - - - - - - |
| | | |
| HSUSB| | - - - - - - |
| HOST|<----------------------->| | |
- - - - - - - | | HSUSB | |
| |Transceiver| |
| | USB83320 | |
| | | |
| - - - - - - |
| |
| |
- - - - - - -- - - - - - - - - - - - - -
High Level-Software Design
=========================
Following are the files which will add support for Daughter Card -
- arch/arm/mach-omap2/board-omap3evm-dc.c
Source file which will handle initialization of the GPMC and similar
stuff, registers to the I2C framework for I2C bus 3(TVP5146 interface).
- arch/arm/mach-omap2/board-omap3evm-dc.h
Corresponding Header file.
Current implementation/support available
========================================
The basic Daughter card support has been added to the latest git kernel; soon I
will be posting the patches for review.
Following things have been tested -
- TVP5146: (On top of Sergio's ISP-Camera patch-sets)
- S-Video
- Composite
- HSUSB:
Basic functionality is working.
NOTE: Please note that all the above testing is done on top of ES2.0 silicon
version.
TODO -
- Component support (Should be very easy)
- Rigorous testing of TVP5146 and HSUSB.
- Camera/sensor support
Thanks,
Vaibhav Hiremath
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