# Realtek RTS54HID

## Introduction

This plugin allows the user to update any supported hub and attached downstream
ICs using a custom HID-based flashing protocol. It does not support any RTS54xx
device using the HUB update protocol.

Other devices connected to the RTS54HIDxx using I2C will be supported soon.

## Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in
an unspecified binary file format.

This plugin supports the following protocol ID:

* com.realtek.rts54

## GUID Generation

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

* `USB\VID_0BDA&PID_1100&REV_0001`
* `USB\VID_0BDA&PID_1100`
* `USB\VID_0BDA`

Child I²C devices are created using the device number as a suffix, for instance:

* `USB\VID_0BDA&PID_1100&I2C_01`

## Update Behavior

The firmware is deployed when the device is in normal runtime mode, and the
device will reset when the new firmware has been written.

## Vendor ID Security

The vendor ID is set from the USB vendor, in this instance set to `USB:0x0BDA`

## Quirk Use

This plugin uses the following plugin-specific quirks:

### Rts54TargetAddr

The target address of a child module.

Since: 1.1.3

### Rts54I2cSpeed

The I2C speed to operate at (0, 1, 2).

Since: 1.1.3

### Rts54RegisterAddrLen

The I2C register address length of commands.

Since: 1.1.3

## External Interface Access

This plugin requires read/write access to `/dev/bus/usb`.