29 lines
802 B
Bash
29 lines
802 B
Bash
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#!/usr/bin/env bash
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# Resets all USB host controllers of the system.
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# This is useful in case one stopped working
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# due to a faulty device having been connected to it.
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base="/sys/bus/pci/drivers"
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sleep_secs="1"
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# This might find a sub-set of these:
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# * 'ohci_hcd' - USB 3.0
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# * 'ehci-pci' - USB 2.0
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# * 'xhci_hcd' - USB 3.0
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echo "Looking for USB standards ..."
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for usb_std in "$base/"?hci[-_]?c*
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do
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echo "* USB standard '$usb_std' ..."
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for dev_path in "$usb_std/"*:*
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do
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dev="$(basename "$dev_path")"
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echo " - Resetting device '$dev' ..."
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printf '%s' "$dev" | sudo tee "$usb_std/unbind" > /dev/null
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sleep "$sleep_secs"
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printf '%s' "$dev" | sudo tee "$usb_std/bind" > /dev/null
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echo " done."
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done
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echo " done."
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done
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echo "done."
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