> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/ubtbcmfw.4.md).

# ubtbcmfw\.4

`ubtbcmfw` — 基于 Broadcom BCM2033 芯片的蓝牙 USB 设备固件驱动

## 名称

`ubtbcmfw`

## 概要

`若要将此驱动编译进内核，请在内核配置文件中加入以下行：`

> device ubtbcmfw

`或者，要在引导时以模块形式加载驱动，请在 loader.conf(5) 中加入以下行：`

```sh
ubtbcmfw_load="YES"
```

## 描述

`ubtbcmfw` 是基于 Broadcom BCM2033 芯片的蓝牙 USB 设备的固件驱动。它提供对设备下载固件所需部分的最低访问。

`ubtbcmfw` 驱动创建三个固定端点设备节点。

控制传输只能在控制端点上进行，该端点始终为端点 0。控制请求通过 ioctl(2) 调用发出。

中断端点仅支持传入传输。要在中断端点上执行 I/O，应使用 read(2)。中断端点上的所有 I/O 操作都是无缓冲的。中断端点始终为端点 1。

批量端点仅支持传出批量传输。要在批量端点上执行 I/O，应使用 write(2)。批量端点上的所有 I/O 操作都是无缓冲的。传出批量端点始终为端点 2。

控制端点（端点 0）处理以下 ioctl(2) 调用：

**`USB_GET_DEVICE_DESC`** (`usb_device_descriptor_t`) 返回设备描述符。

## 文件

**`/dev/ubtbcmfw`** `N``.``EE` 设备 `N` 的端点 `EE`。

## 参见

[ng\_ubt(4)](/man/man4/ng_ubt.4.md), [ugen(4)](https://github.com/FreeBSD-Ask/freebsd-man-sc/blob/main/man4/ugen.4.md), [usb(4)](https://github.com/FreeBSD-Ask/freebsd-man-sc/blob/main/man4/usb.4.md), bcmfw(8)

## 历史

`ubtbcmfw` 驱动实现于 FreeBSD 5.0。

## 作者

Maksim Yevmenkin <m_evmenkin@yahoo.com>

## 缺陷

很可能有。如发现请报告。


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://book.bsdcn.org/man/man4/ubtbcmfw.4.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.