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data-id="usb_device_configuration" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb-device_configuration.html" id="usb_device_configuration-d4445e7341-link">USB Device 配置</a></div></div></li><li role="treeitem" class="active"><div data-tocid="usb_otg_configuration-d4445e7355" class="topicref" data-id="usb_otg_configuration" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb-otg_configuration.html" id="usb_otg_configuration-d4445e7355-link">USB OTG 配置</a></div></div></li></ul></li><li role="treeitem"><div data-tocid="usb_debug_guide-d4445e7369" class="topicref" data-id="usb_debug_guide" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb-debug_guide.html" id="usb_debug_guide-d4445e7369-link">调试指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_test_guide-d4445e7383" class="topicref" data-id="usb_test_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_test_guide-d4445e7383-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb-test_guide.html" id="usb_test_guide-d4445e7383-link">测试指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_design_intro-d4445e7468" class="topicref" data-id="usb_design_intro" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_design_intro-d4445e7468-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb-design_intro.html" id="usb_design_intro-d4445e7468-link">设计说明</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_host_subsystem_code_structure-d4445e7594" class="topicref" data-id="usb_host_subsystem_code_structure" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_host_subsystem_code_structure-d4445e7594-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb-host_subsystem_code_structure.html" id="usb_host_subsystem_code_structure-d4445e7594-link">USB Host 子系统代码架构</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_device_subsystem_code_structure-d4445e7762" class="topicref" data-id="usb_device_subsystem_code_structure" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_device_subsystem_code_structure-d4445e7762-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb-device_subsystem_code_structure.html" id="usb_device_subsystem_code_structure-d4445e7762-link">USB Device 子系统代码架构</a></div></div></li><li role="treeitem"><div data-tocid="usb_common_issues-d4445e7930" class="topicref" data-id="usb_common_issues" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb_faq.html" id="usb_common_issues-d4445e7930-link">常见问题</a></div></div></li></ul></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d4445e7944" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d4445e7944-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d4445e7944-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1">
|
||
<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/usb/usb-otg_configuration.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">USB OTG 配置</h1>
|
||
|
||
<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
||
Read time: 3 minute(s)
|
||
</div>
|
||
<div class="- topic/body concept/conbody body conbody">
|
||
<div class="- topic/div div">
|
||
<p class="- topic/p p" data-ofbid="d132309e35__20250123155212">USB Host 0 和 USB Device 0 共享 1 路 phy。要么同时只能启用其中一种功能，要么启用 USB OTG 功能通过
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">id</code> 管脚的值来动态切换对外功能。</p>
|
||
<ol class="- topic/ol ol" id="usb_otg_configuration__ul_f4r_hdz_21c" data-ofbid="usb_otg_configuration__ul_f4r_hdz_21c">
|
||
<li class="- topic/li li" data-ofbid="d132309e43__20250123155212">
|
||
<div class="- topic/p p" data-ofbid="d132309e45__20250123155212">Linux Kernel Kconfig 文件中使能相应 OTG
|
||
Driver：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="usb_otg_configuration__codeblock_rcy_3hz_21c" data-ofbid="usb_otg_configuration__codeblock_rcy_3hz_21c"><code>> Device Drivers > USB support
|
||
|
||
[*] OTG support
|
||
[*] Support <strong class="hl-keyword">for</strong> ArtInChip on-chip OTG Switch</code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d132309e51__20250123155212">
|
||
<div class="- topic/p p" data-ofbid="d132309e53__20250123155212">DTS 文件中配置相应 OTG
|
||
Device:<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="usb_otg_configuration__codeblock_qvj_jhz_21c" data-ofbid="usb_otg_configuration__codeblock_qvj_jhz_21c"><code>otg: usb-otg {
|
||
compatible = <span class="hl-string">"artinchip,aic-otg-v2.0"</span>;
|
||
};
|
||
|
||
&otg {
|
||
otg-mode = <span class="hl-string">"auto"</span>; <em class="hl-comment">// = auto/host/device</em>
|
||
id-gpios = <&gpio_f <span class="hl-number">15</span> GPIO_ACTIVE_HIGH>;
|
||
vbus-en-gpios = <&gpio_a <span class="hl-number">7</span> GPIO_ACTIVE_HIGH>;
|
||
dp-sw-gpios = <&gpio_e <span class="hl-number">14</span> GPIO_ACTIVE_LOW>;
|
||
status = <span class="hl-string">"okay"</span>;
|
||
};</code></pre></div>
|
||
</li>
|
||
</ol>
|
||
</div>
|
||
<section class="- topic/section section" id="usb_otg_configuration__section_kvg_l3z_21c" data-ofbid="usb_otg_configuration__section_kvg_l3z_21c"><h2 class="- topic/title title sectiontitle">OTG 模式配置</h2>
|
||
<div class="- topic/p p" data-ofbid="d132309e65__20250123155212">OTG 可以配置成 <code class="+ topic/ph pr-d/codeph ph codeph">Auto 模式</code> 或者 <code class="+ topic/ph pr-d/codeph ph codeph">Force
|
||
模式</code> 模式 ：<ul class="- topic/ul ul" id="usb_otg_configuration__ul_k4r_hdz_21c" data-ofbid="usb_otg_configuration__ul_k4r_hdz_21c">
|
||
<li class="- topic/li li" data-ofbid="d132309e75__20250123155212">
|
||
<p class="- topic/p p" data-ofbid="d132309e77__20250123155212"><code class="+ topic/ph pr-d/codeph ph codeph">Auto 模式</code>。根据 <code class="+ topic/ph pr-d/codeph ph codeph">id</code> 管脚的电平来决定当前 OTG 端口工作模式为
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">Host</code> / <code class="+ topic/ph pr-d/codeph ph codeph">Device</code> 。</p>
|
||
<p class="- topic/p p" data-ofbid="d132309e91__20250123155212">通常情况下 <code class="+ topic/ph pr-d/codeph ph codeph">id = low</code> 对应 <code class="+ topic/ph pr-d/codeph ph codeph">Host</code>
|
||
模式， <code class="+ topic/ph pr-d/codeph ph codeph">id = high</code> 对应 <code class="+ topic/ph pr-d/codeph ph codeph">Device</code> 模式。</p>
|
||
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d132309e107__20250123155212">
|
||
<p class="- topic/p p" data-ofbid="d132309e109__20250123155212"><code class="+ topic/ph pr-d/codeph ph codeph">Force 模式</code>。手工配置工作模式，通过配置
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">/sys/devices/platform/soc/soc\:usb-otg/otg_mode</code>
|
||
文件节点的值来改变当前 OTG 端口的工作模式， <code class="+ topic/ph pr-d/codeph ph codeph">host</code> 对应 <code class="+ topic/ph pr-d/codeph ph codeph">Host</code>
|
||
模式， <code class="+ topic/ph pr-d/codeph ph codeph">device</code> 对应 <code class="+ topic/ph pr-d/codeph ph codeph">Device</code> 模式。另外
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">auto</code> 对应 <code class="+ topic/ph pr-d/codeph ph codeph">Auto</code> 模式，需要使用
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">id</code> 管脚来进行判断。</p>
|
||
</li>
|
||
|
||
</ul></div> 两种模式对应 DTS 文件中的 <code class="+ topic/ph pr-d/codeph ph codeph">otg</code> 节点的不同配置：<div class="table-container"><table class="- topic/table table frame-all" id="usb_otg_configuration__table_l4r_hdz_21c" data-ofbid="usb_otg_configuration__table_l4r_hdz_21c" data-cols="4"><caption></caption><colgroup><col style="width:13.755158184319122%"/><col style="width:27.097661623108664%"/><col style="width:25.722145804676757%"/><col style="width:33.425034387895465%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="usb_otg_configuration__table_l4r_hdz_21c__entry__1">Mode</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="usb_otg_configuration__table_l4r_hdz_21c__entry__2">DTS <code class="+ topic/ph pr-d/codeph ph codeph">otg-mode</code> 属性</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="usb_otg_configuration__table_l4r_hdz_21c__entry__3">DTS <code class="+ topic/ph pr-d/codeph ph codeph">xxx-gpios</code> 属性</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="usb_otg_configuration__table_l4r_hdz_21c__entry__4">运行时 <code class="+ topic/ph pr-d/codeph ph codeph">Host</code> / <code class="+ topic/ph pr-d/codeph ph codeph">Device</code> 切换方法</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_l4r_hdz_21c__entry__1">Auto</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_l4r_hdz_21c__entry__2"><code class="+ topic/ph pr-d/codeph ph codeph">otg-mode = "auto";</code> (如果没有配置
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">otg-mode</code> 属性, 默认也是 Auto 模式)</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_l4r_hdz_21c__entry__3"><code class="+ topic/ph pr-d/codeph ph codeph">id-gpios</code> 属性必须配置。 <code class="+ topic/ph pr-d/codeph ph codeph">vbus-en-gpios</code>
|
||
和 <code class="+ topic/ph pr-d/codeph ph codeph">dp-sw-gpios</code> 属性根据硬件配置选配。</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_otg_configuration__table_l4r_hdz_21c__entry__4">OTG 驱动根据 <code class="+ topic/ph pr-d/codeph ph codeph">id-gpios</code> 管脚的电平变化 自动切换 USB 工作模式为
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">Host</code> / <code class="+ topic/ph pr-d/codeph ph codeph">Device</code>。</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_otg_configuration__table_l4r_hdz_21c__entry__1">Force</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_otg_configuration__table_l4r_hdz_21c__entry__2"><code class="+ topic/ph pr-d/codeph ph codeph">otg-mode = "device";</code> 或者 <code class="+ topic/ph pr-d/codeph ph codeph">otg-mode =
|
||
"host";</code></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_otg_configuration__table_l4r_hdz_21c__entry__3"><code class="+ topic/ph pr-d/codeph ph codeph">id-gpios</code> 属性不需要配置。 <code class="+ topic/ph pr-d/codeph ph codeph">vbus-en-gpios</code>
|
||
和 <code class="+ topic/ph pr-d/codeph ph codeph">dp-sw-gpios</code> 属性根据硬件配置选配。</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="usb_otg_configuration__table_l4r_hdz_21c__entry__4">需要配置文件节点来手工切换： <code class="+ topic/ph pr-d/codeph ph codeph">echo devices >
|
||
/sys/devices/platform/soc/soc\:usb-otg/otg_mode</code> 或者
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">echo host >
|
||
/sys/devices/platform/soc/soc\:usb-otg/otg_mode</code></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
</section>
|
||
<section class="- topic/section section" id="usb_otg_configuration__section_m4r_hdz_21c" data-ofbid="usb_otg_configuration__section_m4r_hdz_21c"><h2 class="- topic/title title sectiontitle">OTG 相关 GPIO</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d132309e267__20250123155212">从上面配置可以看到和 OTG 功能相关的 GPIO 管脚有 3 个：</p>
|
||
<ul class="- topic/ul ul" id="usb_otg_configuration__ul_n4r_hdz_21c" data-ofbid="usb_otg_configuration__ul_n4r_hdz_21c">
|
||
<li class="- topic/li li" data-ofbid="d132309e272__20250123155212">
|
||
<p class="- topic/p p" data-ofbid="d132309e274__20250123155212"><code class="+ topic/ph pr-d/codeph ph codeph">id-gpios</code> 。用来检测当前插入的是不是 OTG 线，如果为 OTG 线则需要把本机切换到 USB Host
|
||
模式，否则本机切换到 USB Device 模式。该管脚在 <code class="+ topic/ph pr-d/codeph ph codeph">Auto 模式</code> 模式下是必须配置的，如果缺少该管脚 OTG
|
||
只能工作在 <code class="+ topic/ph pr-d/codeph ph codeph">Force </code> 模式手工进行切换。</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d132309e286__20250123155212">
|
||
<p class="- topic/p p" data-ofbid="d132309e288__20250123155212"><code class="+ topic/ph pr-d/codeph ph codeph">vbus-en-gpios</code> 。该管脚是用来控制 VBUS 的 5V 输出的，通常情况下：切换到 USB Host
|
||
模式时需要使能本机端的 VBUS 5V 输出给对端 Device 供电，切换到 USB Device 模式时需要关闭本机端的 VBUS 5V
|
||
输出转而对端 Host 的供电。（实际使用上来说，不论本端是 Host/Device 模式，也可以在 VBUS 上一直供电 5V 两边 VBUS
|
||
无压差则无漏电，这种情况下 <code class="+ topic/ph pr-d/codeph ph codeph">vbus-en-gpios</code> 无需配置。）</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d132309e297__20250123155212">
|
||
<p class="- topic/p p" data-ofbid="d132309e299__20250123155212"><code class="+ topic/ph pr-d/codeph ph codeph">dp-sw-gpios</code> 。该管脚是在 OTG 外出两个独立 Host、Device 端口时，用来控制外部 Switch
|
||
的。非该模式时， <code class="+ topic/ph pr-d/codeph ph codeph">dp-sw-gpios</code> 无需配置。</p>
|
||
<div class="- topic/p p" data-ofbid="d132309e307__20250123155212"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="usb_otg_configuration__image_p4r_hdz_21c" src="../../../images/usb/otg_gpio.png" alt="image2"/></div><br/></div>
|
||
</li>
|
||
</ul>
|
||
<p class="- topic/p p" data-ofbid="d132309e316__20250123155212">3 个 GPIO 管脚的具体使用场景如上图所示，用户根据自己的使用场景来选择配置哪些 GPIO。每个 GPIO 的 输入输出正反电平有效，可以通过 <span class="- topic/ph ph">DTS 中的 <code class="+ topic/ph pr-d/codeph ph codeph">GPIO_ACTIVE_HIGH</code> 和
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">GPIO_ACTIVE_LOW</code> 来配置</span>：</p>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="usb_otg_configuration__table_q4r_hdz_21c" data-ofbid="usb_otg_configuration__table_q4r_hdz_21c" data-cols="4"><caption></caption><colgroup><col style="width:18.939393939393938%"/><col style="width:15.151515151515152%"/><col style="width:34.24242424242424%"/><col style="width:31.666666666666664%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="usb_otg_configuration__table_q4r_hdz_21c__entry__1">GPIO Name</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="usb_otg_configuration__table_q4r_hdz_21c__entry__2">Direction</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="usb_otg_configuration__table_q4r_hdz_21c__entry__3">GPIO_ACTIVE_HIGH</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="usb_otg_configuration__table_q4r_hdz_21c__entry__4">GPIO_ACTIVE_LOW</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__1"><code class="+ topic/ph pr-d/codeph ph codeph">id-gpios</code></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__2">input</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d132309e372__20250123155212">输入低电平 = Host，</p>
|
||
<p class="- topic/p p" data-ofbid="d132309e375__20250123155212">输入高电平 = Device</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d132309e381__20250123155212">输入低电平 = Device，</p>
|
||
<p class="- topic/p p" data-ofbid="d132309e384__20250123155212">输入高电平 = Host</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__1"><code class="+ topic/ph pr-d/codeph ph codeph">vbus-en-gpios</code></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__2">output</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d132309e400__20250123155212">Host (VBUS on) = 输出高电平</p>
|
||
<p class="- topic/p p" data-ofbid="d132309e403__20250123155212">Device (VBUS off) = 输出低电平</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d132309e409__20250123155212">Host (VBUS on) = 输出低电平</p>
|
||
<p class="- topic/p p" data-ofbid="d132309e412__20250123155212">Device (VBUS off) = 输出高电平</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__1"><code class="+ topic/ph pr-d/codeph ph codeph">dp-sw-gpios</code></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__2">output</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d132309e428__20250123155212">Host = 输出高电平</p>
|
||
<p class="- topic/p p" data-ofbid="d132309e431__20250123155212">Device = 输出低电平</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="usb_otg_configuration__table_q4r_hdz_21c__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d132309e437__20250123155212">Host = 低电平</p>
|
||
<p class="- topic/p p" data-ofbid="d132309e440__20250123155212">Device = 高电平</p>
|
||
</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
</section>
|
||
|
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#usb_otg_configuration__section_kvg_l3z_21c" data-tocid="usb_otg_configuration__section_kvg_l3z_21c">OTG 模式配置</a></div></li><li class="section-item"><div class="section-title"><a href="#usb_otg_configuration__section_m4r_hdz_21c" data-tocid="usb_otg_configuration__section_m4r_hdz_21c">OTG 相关 GPIO</a></div></li></ul></div>
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Update Time: 2025-01-23
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