| OZWPAN USB Host Controller Driver | |
| --------------------------------- | |
| This driver is a USB HCD driver that does not have an associated a physical | |
| device but instead uses Wi-Fi to communicate with the wireless peripheral. | |
| The USB requests are converted into a layer 2 network protocol and transmitted | |
| on the network using an ethertype (0x892e) regestered to Ozmo Device Inc. | |
| This driver is compatible with existing wireless devices that use Ozmo Devices | |
| technology. | |
| To operate the driver must be bound to a suitable network interface. This can | |
| be done when the module is loaded (specifying the name of the network interface | |
| as a parameter - e.g. 'insmod ozwpan g_net_dev=go0') or can be bound after | |
| loading using an ioctl call. See the ozappif.h file and the ioctls | |
| OZ_IOCTL_ADD_BINDING and OZ_IOCTL_REMOVE_BINDING. | |
| The devices connect to the host use Wi-Fi Direct so a network card that supports | |
| Wi-Fi direct is required. A recent version (0.8.x or later) version of the | |
| wpa_supplicant can be used to setup the network interface to create a persistent | |
| autonomous group (for older pre-WFD peripherals) or put in a listen state to | |
| allow group negotiation to occur for more recent devices that support WFD. | |
| The protocol used over the network does not directly mimic the USB bus | |
| transactions as this would be rather busy and inefficient. Instead the chapter 9 | |
| requests are converted into a request/response pair of messages. (See | |
| ozprotocol.h for data structures used in the protocol). |