On Mon, May 06, 2024 at 04:44:30PM +0530, Muni Sekhar wrote: > Dear Linux USB Subsystem Community, > > I hope this email finds you well. We are currently working on a USB > device driver in the Linux kernel space, which supports the > suspend/resume functionality for a USB device using the struct > usb_driver's .suspend and .resume callbacks. > > > In our driver code, we perform a check to determine if the device has > remote wakeup capability. If the device supports remote wakeup, we > enable the device's autosuspend mode by setting the struct > usb_device->dev.power.autosuspend_delay parameter and then calling > usb_enable_autosuspend(). > > > Similarly, to resume the suspended device, we expose an API to user > space via IOCTL. In this process, we set struct > usb_device->dev.power.autosuspend_delay to -1 and then call > usb_disable_autosuspend(). > > > While we have successfully converted most of the USB device driver > functionality from kernel space to user space using libusb, we are now > seeking guidance on how to implement USB device suspend/resume in user > space. Specifically, we would like to know if libusb provides support > for achieving the suspend/resume functionality mentioned above. > Additionally, any insights or suggestions on how to accomplish this > task would be greatly appreciated. Your question is about libusb, right? So you'll get better answers if you post it on the libusb mailing list rather than the linux-usb mailing list. Alan Stern > It's worth mentioning that our USB device driver also supports > Bulk\Coontrol I/O transfers and other functionalities. > > > Thank you in advance for any assistance you can provide. I look > forward to your valuable inputs and recommendations. > > > -- > Thanks, > Sekhar >
