static int
setstack_elsa(struct PStack *st, struct BCState *bcs)
{

	bcs->channel = st->l1.bc;
	switch (st->l1.mode) {
		case L1_MODE_HDLC:
		case L1_MODE_TRANS:
			if (open_hscxstate(st->l1.hardware, bcs))
				return (-1);
			st->l2.l2l1 = hscx_l2l1;
			break;
		case L1_MODE_MODEM:
			bcs->mode = L1_MODE_MODEM;
			if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
				bcs->hw.hscx.rcvbuf = bcs->cs->hw.elsa.rcvbuf;
				skb_queue_head_init(&bcs->rqueue);
				skb_queue_head_init(&bcs->squeue);
			}
			bcs->tx_skb = NULL;
			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
			bcs->event = 0;
			bcs->hw.hscx.rcvidx = 0;
			bcs->tx_cnt = 0;
			bcs->cs->hw.elsa.bcs = bcs;
			st->l2.l2l1 = modem_l2l1;
			break;
	}
	st->l1.bcs = bcs;
	setstack_manager(st);
	bcs->st = st;
	setstack_l1_B(st);
	return (0);
}

int
setstack_hscx(struct PStack *st, struct BCState *bcs)
{
	bcs->channel = st->l1.bc;
	if (open_hscxstate(st->l1.hardware, bcs))
		return (-1);
	st->l1.bcs = bcs;
	st->l1.l2l1 = hscx_l2l1;
	setstack_manager(st);
	bcs->st = st;
	setstack_l1_B(st);
	return (0);
}

static int
setstack_w6692(struct PStack *st, struct BCState *bcs)
{
	bcs->channel = st->l1.bc;
	if (open_w6692state(st->l1.hardware, bcs))
		return (-1);
	st->l1.bcs = bcs;
	st->l2.l2l1 = W6692_l2l1;
	setstack_manager(st);
	bcs->st = st;
	setstack_l1_B(st);
	return (0);
}

static int hisax_bc_setstack(struct PStack *st, struct BCState *bcs)
{
	struct IsdnCardState *cs = st->l1.hardware;
	struct hisax_d_if *hisax_d_if = cs->hw.hisax_d_if;

	bcs->channel = st->l1.bc;

	bcs->hw.b_if = hisax_d_if->b_if[st->l1.bc];
	hisax_d_if->b_if[st->l1.bc]->bcs = bcs;

	st->l1.bcs = bcs;
	st->l2.l2l1 = hisax_b_l2l1;
	setstack_manager(st);
	bcs->st = st;
	setstack_l1_B(st);
	skb_queue_head_init(&bcs->rqueue);
	skb_queue_head_init(&bcs->squeue);
	return 0;
}