Manual Pages  — UBTBCMFW

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

ubtbcmfw_load="YES"

The control transfers can only happen on the control endpoint which is always endpoint 0. Control requests are issued by ioctl(2) calls.

Only incoming transfers are supported on an interrupt endpoint. To perform I/O on an interrupt endpoint, read(2) should be used. All I/O operations on an interrupt endpoint are unbuffered. Interrupt endpoint is always endpoint 1.

Only outgoing bulk transfers are supported on a bulk endpoint. To perform I/O on a bulk endpoint, write(2) should be used. All I/O operations on a bulk endpoint are unbuffered. Outgoing bulk endpoint is always endpoint 2.

The control endpoint (endpoint 0) handles the following ioctl(2) calls:

USB_GET_DEVICE_DESC (usb_device_descriptor_t)
	Return the device descriptor.