BT_CTRL_PORT
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_SRST);
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_SRST);
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_IRST);
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_IRST);
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_HRST | BT_CTRL_SRST);