HC_CONTROL
reg_set(HC_CONTROL, HC_CONTROL_BUS_ENABLE | HC_CONTROL_HOT_JOIN_CTRL);
dev_dbg(&hci->master.dev, "HC_CONTROL = %#x", reg_read(HC_CONTROL));
reg_clear(HC_CONTROL, HC_CONTROL_BUS_ENABLE);
ret = readx_poll_timeout(reg_read, HC_CONTROL, regval,
reg_set(HC_CONTROL, HC_CONTROL_RESUME);
reg_clear(HC_CONTROL, HC_CONTROL_PIO_MODE);
reg_set(HC_CONTROL, HC_CONTROL_PIO_MODE);
pio_mode = reg_read(HC_CONTROL) & HC_CONTROL_PIO_MODE;
regval = reg_read(HC_CONTROL);
reg_write(HC_CONTROL, regval);
regval = reg_read(HC_CONTROL);
reg_write(HC_CONTROL, regval);
regval = reg_read(HC_CONTROL);
reg_set(HC_CONTROL, HC_CONTROL_BUS_ENABLE | HC_CONTROL_HOT_JOIN_CTRL);