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- What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_*
- Date: August 2008
- KernelVersion: 2.6.27
- Contact: David Vrabel <david.vrabel@csr.com>
- Description:
- Various files for managing Cable Based Association of
- (wireless) USB devices.
- The sequence of operations should be:
- 1. Device is plugged in.
- 2. The connection manager (CM) sees a device with CBA capability.
- (the wusb_chid etc. files in /sys/devices/blah/OURDEVICE).
- 3. The CM writes the host name, supported band groups,
- and the CHID (host ID) into the wusb_host_name,
- wusb_host_band_groups and wusb_chid files. These
- get sent to the device and the CDID (if any) for
- this host is requested.
- 4. The CM can verify that the device's supported band
- groups (wusb_device_band_groups) are compatible
- with the host.
- 5. The CM reads the wusb_cdid file.
- 6. The CM looks it up its database.
- - If it has a matching CHID,CDID entry, the device
- has been authorized before and nothing further
- needs to be done.
- - If the CDID is zero (or the CM doesn't find a
- matching CDID in its database), the device is
- assumed to be not known. The CM may associate
- the host with device by: writing a randomly
- generated CDID to wusb_cdid and then a random CK
- to wusb_ck (this uploads the new CC to the
- device).
- CMD may choose to prompt the user before
- associating with a new device.
- 7. Device is unplugged.
- References:
- [WUSB-AM] Association Models Supplement to the
- Certified Wireless Universal Serial Bus
- Specification, version 1.0.
- What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_chid
- Date: August 2008
- KernelVersion: 2.6.27
- Contact: David Vrabel <david.vrabel@csr.com>
- Description:
- The CHID of the host formatted as 16 space-separated
- hex octets.
- Writes fetches device's supported band groups and the
- the CDID for any existing association with this host.
- What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_host_name
- Date: August 2008
- KernelVersion: 2.6.27
- Contact: David Vrabel <david.vrabel@csr.com>
- Description:
- A friendly name for the host as a UTF-8 encoded string.
- What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_host_band_groups
- Date: August 2008
- KernelVersion: 2.6.27
- Contact: David Vrabel <david.vrabel@csr.com>
- Description:
- The band groups supported by the host, in the format
- defined in [WUSB-AM].
- What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_device_band_groups
- Date: August 2008
- KernelVersion: 2.6.27
- Contact: David Vrabel <david.vrabel@csr.com>
- Description:
- The band groups supported by the device, in the format
- defined in [WUSB-AM].
- What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_cdid
- Date: August 2008
- KernelVersion: 2.6.27
- Contact: David Vrabel <david.vrabel@csr.com>
- Description:
- The device's CDID formatted as 16 space-separated hex
- octets.
- What: /sys/bus/usb/drivers/wusb_cbaf/.../wusb_ck
- Date: August 2008
- KernelVersion: 2.6.27
- Contact: David Vrabel <david.vrabel@csr.com>
- Description:
- Write 16 space-separated random, hex octets to
- associate with the device.
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