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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" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/usb/usb-controller-interface_design.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1><div class="date inPage">24 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><div class="table-container"><table class="- topic/table table frame-all" id="usb_controller_interface_design__table_qnp_gmz_21c" data-ofbid="usb_controller_interface_design__table_qnp_gmz_21c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">ehci_urb_enqueue</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="usb_controller_interface_design__table_qnp_gmz_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="usb_controller_interface_design__table_qnp_gmz_21c__entry__2">int ehci_urb_enqueue (struct usb_hcd *hcd, struct urb *urb, gfp_t
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mem_flags)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_qnp_gmz_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_qnp_gmz_21c__entry__2">接收上层传入的 urb，并将其压入 EHCI 的硬件队列。</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_qnp_gmz_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_qnp_gmz_21c__entry__2">
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<p class="- topic/p p" data-ofbid="d258593e45__20250121171716">hcd：当前 hcd 控制结构</p>
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<p class="- topic/p p" data-ofbid="d258593e48__20250121171716">urb：当前 urb 控制结构</p>
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<p class="- topic/p p" data-ofbid="d258593e51__20250121171716">mem_flags：分配内存时使用的标志</p>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_qnp_gmz_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_qnp_gmz_21c__entry__2">0，成功。 < 0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_controller_interface_design__table_qnp_gmz_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="usb_controller_interface_design__table_qnp_gmz_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="usb_controller_interface_design__table_rnp_gmz_21c" data-ofbid="usb_controller_interface_design__table_rnp_gmz_21c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">ehci_hub_control</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="usb_controller_interface_design__table_rnp_gmz_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="usb_controller_interface_design__table_rnp_gmz_21c__entry__2">int ehci_hub_control (struct usb_hcd *hcd, u16 typeReq, u16
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wValue, u16 wIndex, char *buf, u16 wLength)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_rnp_gmz_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_rnp_gmz_21c__entry__2">处理 roothub 相关的 control 命令。</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_rnp_gmz_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_rnp_gmz_21c__entry__2">
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<p class="- topic/p p" data-ofbid="d258593e87__20250121171716">hcd：当前 hcd 控制结构</p>
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<p class="- topic/p p" data-ofbid="d258593e90__20250121171716">typeReq：setup token 中的对应字段</p>
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<p class="- topic/p p" data-ofbid="d258593e93__20250121171716">wValue：setup token 中的对应字段</p>
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<p class="- topic/p p" data-ofbid="d258593e96__20250121171716">wIndex：setup token 中的对应字段</p>
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<p class="- topic/p p" data-ofbid="d258593e99__20250121171716">buf：setup data 需要的数据</p>
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<p class="- topic/p p" data-ofbid="d258593e103__20250121171716">wLength：setup token 中的对应字段</p>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_rnp_gmz_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_rnp_gmz_21c__entry__2">0，成功。 < 0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_controller_interface_design__table_rnp_gmz_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="usb_controller_interface_design__table_rnp_gmz_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="usb_controller_interface_design__table_snp_gmz_21c" data-ofbid="usb_controller_interface_design__table_snp_gmz_21c" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">ehci_hub_status_data</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="usb_controller_interface_design__table_snp_gmz_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="usb_controller_interface_design__table_snp_gmz_21c__entry__2">int ehci_hub_status_data (struct usb_hcd *hcd, char *buf)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_snp_gmz_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_snp_gmz_21c__entry__2">查询 hub 端口状态。</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_snp_gmz_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_snp_gmz_21c__entry__2">
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<p class="- topic/p p" data-ofbid="d258593e139__20250121171716">hcd：当前 hcd 控制结构</p>
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<p class="- topic/p p" data-ofbid="d258593e142__20250121171716">buf：返回获取的 hub 端口状态</p>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="usb_controller_interface_design__table_snp_gmz_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="usb_controller_interface_design__table_snp_gmz_21c__entry__2">>0，成功获取端口状态的长度。 = 0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="usb_controller_interface_design__table_snp_gmz_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="usb_controller_interface_design__table_snp_gmz_21c__entry__2">-</td></tr></tbody></table></div></div></article></main></div>
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