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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-data_structure_design.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">数据结构设计</h1><div class="date inPage">31 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"><section class="- topic/section section" id="usb_controller_data_structure_design__section_odx_dmz_21c" data-ofbid="usb_controller_data_structure_design__section_odx_dmz_21c"><h2 class="- topic/title title sectiontitle">ehci_hc_driver</h2>
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<div class="- topic/p p" data-ofbid="d198337e27__20250121171633">HCD 核心的数据结构为 hc_driver，EHCI
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实现了以下的核心函数：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="usb_controller_data_structure_design__codeblock_mxf_2mz_21c" data-ofbid="usb_controller_data_structure_design__codeblock_mxf_2mz_21c"><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> hc_driver ehci_hc_driver = {
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.description = hcd_name,
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.product_desc = <span class="hl-string">"EHCI Host Controller"</span>,
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.hcd_priv_size = <strong class="hl-keyword">sizeof</strong>(<strong class="hl-keyword">struct</strong> ehci_hcd),
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<em class="hl-comment">/*
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* generic hardware linkage
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*/</em>
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
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<em class="hl-comment">/*
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* basic lifecycle operations
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*/</em>
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.reset = ehci_setup,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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<em class="hl-comment">/*
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* managing i/o requests and associated device resources
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*/</em>
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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<em class="hl-comment">/*
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* scheduling support
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*/</em>
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.get_frame_number = ehci_get_frame,
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<em class="hl-comment">/*
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* root hub support
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*/</em>
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.get_resuming_ports = ehci_get_resuming_ports,
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<em class="hl-comment">/*
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* device support
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*/</em>
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.free_dev = ehci_remove_device,
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};</pre></div>
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</section></div></article></main></div>
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