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| -rw-r--r-- | Documentation/ABI/testing/sysfs-wusb_cbaf | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-wusb_cbaf b/Documentation/ABI/testing/sysfs-wusb_cbaf new file mode 100644 index 000000000..a99c5f86a --- /dev/null +++ b/Documentation/ABI/testing/sysfs-wusb_cbaf @@ -0,0 +1,100 @@ +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. |