早期的USB只支持单一的gadget设备,使用场景较为简单,随后加入了composite framework,用来支持多个function的gadget设备,多个function的绑定在内核中完成,若需要修改,则需要修改内核,不灵活也不方便。Linux3.11版本引入了基于configfs的usb gadget configfs。usb gadget configfs重新实现了复合设备层,使用者可以在用户空间配置...
/config/usb_gadget/g1/strings /config/usb_gadget/g1/configs/b.1 /config/usb_gadget/g1/configs/b.1/strings item: --- /config/usb_gadget/g1/os_desc /config/usb_gadget/g1/configs/b.1/strings/0x409 /config/usb_gadget/g1/configs/b.1/strings/0x409 /config/usb_gadget/g1/functions/...
以uac2.0为例，通过USB gadget configfs，用户可以在用户空间配置uac2.0设备，无需修改内核配置。配置过程通过执行特定脚本，生成的文件结构遵循预设的层次，b开头的文件配置设备描述符，functions目录下文件配置function驱动参数。在实现USB gadget configfs的过程中，关键在于初始化和调用流程分析。初始化函...
usb_ep_autoconfig_reset(cdev->gadget); spin_lock_irqsave(&gi->spinlock, flags); cdev->gadget = NULL; set_gadget_data(gadget, NULL); spin_unlock_irqrestore(&gi->spinlock, flags); }static int configfs_composite_setup(struct usb_gadget *gadget, ...
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I'm trying to add uvc and mass storage in device mode for single usb device controller port. I'm using configfs to do job. Can anybody tell how to do it. Regards, GBiradar linux linux-kernel embedded-linux uvc Share Improve this question Follow asked Mar 20, 20...
KernelUSBGadgetConfigfsInterfaceMattPorterLinaroOverview●Prereqs:understandUSB●LinuxUSBTerminology●BriefhistoryofUSBgadgetsubsystem●Otherfiles..
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nodev configfs 2)You also need to disable the current devices that NVIDIA creates on start. sudo systemctl stop nv-l4t-usb-device-mode.service Create and set up the gadget Create the gadget 1)Set CONFIGFS_HOME as the mount point for configfs. ...