#### Plugin: Sunplus Camera

## Introduction

This plugin updates Sunplus/HYGD UVC cameras that expose the normal runtime firmware update path over `video4linux` extension-unit controls.

This first implementation is intentionally limited to the healthy runtime mode:

- `USB\VID_1BCF&PID_2CED`

It does not support recovery-state devices that enumerate as `1bcf:0b09`.

## Firmware Format

The firmware payload is a raw vendor `.bin` blob.

This plugin supports the following protocol ID:

- `com.sunplus.camera`

## GUID Generation

These devices use the standard UDEV DeviceInstanceId values, e.g.

- `VIDEO4LINUX\VEN_1BCF&DEV_2CED`

## Update Behavior

The device is updated in runtime mode using UVC extension-unit controls on the primary `video4linux` capture node for the detached camera. This is not guaranteed to be `/dev/video0`; on systems with an integrated webcam it may be another node such as `/dev/video4`.

The normal update flow is:

- enable ISP/download mode using selector `9`
- clear ASIC register `0x2501` if the previous download-state value is nonzero
- stream the raw payload using selector `10`
- compare the XOR checksum using selector `11`
- finalize the transfer using selector `12`
- verify the programmed contents using selector `14` + selector `22`
- trigger a vendor soft reset using ASIC register writes over selectors `2` and `3`

## External Interface Access

This plugin requires read/write access to the primary `video4linux` node for the detached camera. This plugin requires the `UVCIOC_CTRL_QUERY` ioctl interface.