34 lines
1.7 KiB
Plaintext
34 lines
1.7 KiB
Plaintext
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#
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# Rules for Google Case Closed Debugging devices.
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#
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# The first rule matches the google VID and records the product name, USB bus
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# number and USB device path (the device path is the list of hub ports between
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# the root and the device). This becomes a unique directory name under which
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# later rules can create symlinks. If this rule doesn't match udev will skip
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# the rest of this files rules.
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#
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# This rule intentionally matches using SUBSYSTEMS and ATTRS instead of
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# SUBSYSTEM and ATTR so that the GOOGLE_CCD_NAME is available to all nodes
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# that descend from a Google USB device (this includes all USB interface nodes
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# as well as all of the TTY nodes derived from CCD USB interfaces).
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#
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SUBSYSTEMS=="usb", ATTRS{idVendor}=="18d1", ENV{GOOGLE_CCD_NAME}="$attr{product}-$attr{busnum}-$attr{devpath}"
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#
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# Force ModemManager to ignore all Google case closed debug devices. It would
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# be better to just ignore the case closed debug serial console interfaces, but
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# ModemManager doesn't look at the usb_interface udev node, it looks at the
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# usb_device node, so you have to mark the entire device as incompatible with
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# ModemManager.
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#
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# This node could lose the match against the usb_device DEVTYPE and still work,
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# it would just add extraneous ID_MM_DEVICE_IGNORE tags to the TTY and USB
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# interface nodes.
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#
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SUBSYSTEM=="usb", ENV{GOOGLE_CCD_NAME}!="", ENV{DEVTYPE}=="usb_device", ENV{ID_USB_INTERFACES}=="*:ff5001:*", ENV{ID_MM_DEVICE_IGNORE}="1"
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#
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# Construct a symlink to a TTY generated from a CCD USB serial interface.
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#
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SUBSYSTEM=="tty", ENV{GOOGLE_CCD_NAME}!="", ATTRS{bInterfaceClass}=="ff", ATTRS{bInterfaceSubClass}=="50", ATTRS{bInterfaceProtocol}=="01", OPTIONS+="string_escape=replace", SYMLINK+="google/$env{GOOGLE_CCD_NAME}/serial/$attr{interface}"
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