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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 >
< div class = "- topic/p p" data-ofbid = "d198337e27__20250121171633" > HCD 核心的数据结构为 hc_driver，
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 = {
.description = hcd_name,
.product_desc = < span class = "hl-string" > "EHCI Host Controller"< / span > ,
.hcd_priv_size = < strong class = "hl-keyword" > sizeof< / strong > (< strong class = "hl-keyword" > struct< / strong > ehci_hcd),
< em class = "hl-comment" > /*
* generic hardware linkage
*/< / em >
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
< em class = "hl-comment" > /*
* basic lifecycle operations
*/< / em >
.reset = ehci_setup,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
< em class = "hl-comment" > /*
* managing i/o requests and associated device resources
*/< / em >
.urb_enqueue = ehci_urb_enqueue,
.urb_dequeue = ehci_urb_dequeue,
.endpoint_disable = ehci_endpoint_disable,
.endpoint_reset = ehci_endpoint_reset,
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
< em class = "hl-comment" > /*
* scheduling support
*/< / em >
.get_frame_number = ehci_get_frame,
< em class = "hl-comment" > /*
* root hub support
*/< / em >
.hub_status_data = ehci_hub_status_data,
.hub_control = ehci_hub_control,
.bus_suspend = ehci_bus_suspend,
.bus_resume = ehci_bus_resume,
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
.get_resuming_ports = ehci_get_resuming_ports,
< em class = "hl-comment" > /*
* device support
*/< / em >
.free_dev = ehci_remove_device,
};< / pre > < / div >
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