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BBeOS/docs/phases/PHASE_3_IMPLEMENTATION.md
Eliott 73fb76098e
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Reorganize BBeOS project structure for better maintainability 
- Reorganized directory structure following open source best practices
- Created src/ directory for all source code components
- Moved build artifacts to build/ subdirectories
- Organized documentation into phases/, guides/, and api/ subdirectories
- Moved third-party code to vendor/ directory
- Moved downloads to downloads/ directory
- Updated all build scripts to reference new directory structure
- Created comprehensive PROJECT_STRUCTURE.md documentation
- Added DEVELOPMENT_GUIDE.md as main entry point
- Improved separation of concerns and maintainability
- Follows standard open source project conventions
2025-08-01 11:48:06 +02:00

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Phase 3 Implementation Plan - Hardware Support Layer

🎯 Phase 3 Goals

  • Kernel boots successfully on actual Q20 hardware
  • Serial console accessible and functional
  • Basic hardware peripherals working
  • Display and input systems operational
  • Audio system functional

📋 Implementation Tasks

1. Hardware Testing Setup

  • Serial Console Access

    • Set up USB-to-serial adapter
    • Configure terminal for 115200 baud
    • Test communication with device

  • Boot Method Selection

    • Fastboot (if bootloader unlocked)
    • EDL mode (emergency download)
    • Recovery mode modification
    • kexec (if kernel already running)

2. Display Driver Development

  • MDP5 Driver Integration

    • Verify MSM8960 MDP5 support
    • Configure display timing for 720x720
    • Test framebuffer output

  • DSI Panel Driver

    • Research Q20 panel specifications
    • Create panel driver or adapt existing
    • Test display initialization

3. Input System Development

  • Keyboard Driver

    • I2C keyboard controller driver
    • Key mapping for QWERTY layout
    • Input event handling

  • Trackpad Driver

    • I2C trackpad controller driver
    • Pointer movement and click events
    • Integration with input subsystem

4. Audio System

  • WCD9310 Codec Driver
    • ALSA driver for audio codec
    • Speaker and headphone support
    • Microphone input support

5. Connectivity Drivers

  • Wi-Fi Driver

    • Identify Wi-Fi chipset
    • Load firmware blobs
    • Network interface setup

  • Bluetooth Driver

    • Bluetooth chipset identification
    • Firmware loading
    • HCI interface setup

6. Power Management

  • Battery Driver

    • I2C battery fuel gauge
    • Battery status monitoring
    • Power level reporting

  • Charger Driver

    • USB charging detection
    • Charging status monitoring

🔧 Development Approach

Driver Development Strategy

  1. Research First: Identify existing drivers for similar hardware
  2. Adapt Existing: Modify existing drivers for Q20 specifics
  3. Create New: Develop custom drivers when needed
  4. Test Incrementally: Test each component individually

Testing Methodology

  1. QEMU Testing: Test drivers in emulation first
  2. Hardware Testing: Test on actual device
  3. Serial Debugging: Use UART for debugging output
  4. Incremental Boot: Test each component as it's added

📊 Success Criteria

Phase 3 Completion

  • Kernel boots on Q20 hardware
  • Serial console functional
  • Display shows output
  • Keyboard input working
  • Basic audio support
  • Wi-Fi/Bluetooth framework ready

🚀 Next Steps

  1. Set up hardware testing environment
  2. Begin with serial console access
  3. Test basic kernel boot on device
  4. Develop display driver
  5. Add input system support