BT_CTRL_B2H_ATN
bt_outb(bt_bmc, BT_CTRL_B2H_ATN, BT_CTRL);
(BT_CTRL_H_BUSY | BT_CTRL_B2H_ATN))))
(BT_CTRL_H_BUSY | BT_CTRL_B2H_ATN))) {
if (!(ctrl & (BT_CTRL_H_BUSY | BT_CTRL_B2H_ATN)))