OP_USBSTS
return hw_read(ci, OP_USBSTS, ~0);
hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff);
[OP_USBSTS] = 0x04U,
[OP_USBSTS] = 0x04U,
hw_write(ci, OP_USBSTS, USBi_SLI, USBi_SLI);
hw_write(ci, OP_USBSTS, ~0, reg);