1USB_GET_CURRENT_FRAM(9)          USB Core APIs         USB_GET_CURRENT_FRAM(9)
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NAME

6       usb_get_current_frame_number - return current bus frame number
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SYNOPSIS

9       int usb_get_current_frame_number(struct usb_device * dev);
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ARGUMENTS

12       dev
13           the device whose bus is being queried
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RETURN

16       The current frame number for the USB host controller used with the
17       given USB device. This can be used when scheduling isochronous
18       requests.
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NOTE

21       Different kinds of host controller have different “scheduling
22       horizons”. While one type might support scheduling only 32 frames into
23       the future, others could support scheduling up to 1024 frames into the
24       future.
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27Kernel Hackers Manual 3.10         June 2019           USB_GET_CURRENT_FRAM(9)
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