usba_if_pwr_descr_t
uint_t alt_if_setting, usba_if_pwr_descr_t *ret_descr, size_t ret_buf_len)
extern usba_if_pwr_descr_t default_if_power;
usba_if_pwr_descr_t default_if_power = {
usba_if_pwr_descr_t ifpwr_descr;
uint_t, usba_if_pwr_descr_t *, size_t);