patch-2.0.36 linux/drivers/isdn/hisax/hfc_2bs0.c

• Lines: 602
• Date: Sun Nov 15 10:32:58 1998
• Orig file: v2.0.35/linux/drivers/isdn/hisax/hfc_2bs0.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.0.35/linux/drivers/isdn/hisax/hfc_2bs0.c linux/drivers/isdn/hisax/hfc_2bs0.c
@@ -0,0 +1,601 @@
+/* $Id: hfc_2bs0.c,v 1.1.2.8 1998/11/03 00:06:29 keil Exp $
+
+ *  specific routines for CCD's HFC 2BS0
+ *
+ * Author       Karsten Keil (keil@isdn4linux.de)
+ *
+ *
+ * $Log: hfc_2bs0.c,v $
+ * Revision 1.1.2.8  1998/11/03 00:06:29  keil
+ * certification related changes
+ * fixed logging for smaller stack use
+ *
+ * Revision 1.1.2.7  1998/09/30 22:23:59  keil
+ * Fix missing line in setstack*
+ *
+ * Revision 1.1.2.6  1998/09/27 13:06:05  keil
+ * Apply most changes from 2.1.X (HiSax 3.1)
+ *
+ * Revision 1.1.2.5  1998/05/27 18:05:27  keil
+ * HiSax 3.0
+ *
+ * Revision 1.1.2.4  1998/04/08 21:54:38  keil
+ * Fix "ll_trans ..." message
+ *
+ * Revision 1.1.2.3  1998/04/04 21:59:23  keil
+ * Fixed B-channel access
+ *
+ * Revision 1.1.2.2  1997/11/15 18:54:27  keil
+ * cosmetics
+ *
+ * Revision 1.1.2.1  1997/10/17 22:10:41  keil
+ * new files on 2.0
+ *
+ * Revision 1.1  1997/09/11 17:31:33  keil
+ * Common part for HFC 2BS0 based cards
+ *
+ *
+ */
+
+#define __NO_VERSION__
+#include "hisax.h"
+#include "hfc_2bs0.h"
+#include "isac.h"
+#include "isdnl1.h"
+#include <linux/interrupt.h>
+
+static inline int
+WaitForBusy(struct IsdnCardState *cs)
+{
+	int to = 130;
+	long flags;
+	u_char val;
+
+	save_flags(flags);
+	cli();
+	while (!(cs->BC_Read_Reg(cs, HFC_STATUS, 0) & HFC_BUSY) && to) {
+		val = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2 |
+				      (cs->hw.hfc.cip & 3));
+		udelay(1);
+		to--;
+	}
+	restore_flags(flags);
+	if (!to) {
+		printk(KERN_WARNING "HiSax: waitforBusy timeout\n");
+		return (0);
+	} else
+		return (to);
+}
+
+static inline int
+WaitNoBusy(struct IsdnCardState *cs)
+{
+	int to = 125;
+
+	while ((cs->BC_Read_Reg(cs, HFC_STATUS, 0) & HFC_BUSY) && to) {
+		udelay(1);
+		to--;
+	}
+	if (!to) {
+		printk(KERN_WARNING "HiSax: waitforBusy timeout\n");
+		return (0);
+	} else
+		return (to);
+}
+
+int
+GetFreeFifoBytes(struct BCState *bcs)
+{
+	int s;
+
+	if (bcs->hw.hfc.f1 == bcs->hw.hfc.f2)
+		return (bcs->cs->hw.hfc.fifosize);
+	s = bcs->hw.hfc.send[bcs->hw.hfc.f1] - bcs->hw.hfc.send[bcs->hw.hfc.f2];
+	if (s <= 0)
+		s += bcs->cs->hw.hfc.fifosize;
+	s = bcs->cs->hw.hfc.fifosize - s;
+	return (s);
+}
+
+int
+ReadZReg(struct BCState *bcs, u_char reg)
+{
+	int val;
+
+	WaitNoBusy(bcs->cs);
+	val = 256 * bcs->cs->BC_Read_Reg(bcs->cs, HFC_DATA, reg | HFC_CIP | HFC_Z_HIGH);
+	WaitNoBusy(bcs->cs);
+	val += bcs->cs->BC_Read_Reg(bcs->cs, HFC_DATA, reg | HFC_CIP | HFC_Z_LOW);
+	return (val);
+}
+
+void
+hfc_sched_event(struct BCState *bcs, int event)
+{
+	bcs->event |= 1 << event;
+	queue_task(&bcs->tqueue, &tq_immediate);
+	mark_bh(IMMEDIATE_BH);
+}
+
+static void
+hfc_clear_fifo(struct BCState *bcs)
+{
+	struct IsdnCardState *cs = bcs->cs;
+	long flags;
+	int idx, cnt;
+	int rcnt, z1, z2;
+	u_char cip, f1, f2;
+
+	if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
+		debugl1(cs, "hfc_clear_fifo");
+	save_flags(flags);
+	cli();
+	cip = HFC_CIP | HFC_F1 | HFC_REC | HFC_CHANNEL(bcs->channel);
+	if ((cip & 0xc3) != (cs->hw.hfc.cip & 0xc3)) {
+		cs->BC_Write_Reg(cs, HFC_STATUS, cip, cip);
+		WaitForBusy(cs);
+	}
+	WaitNoBusy(cs);
+	f1 = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+	cip = HFC_CIP | HFC_F2 | HFC_REC | HFC_CHANNEL(bcs->channel);
+	WaitNoBusy(cs);
+	f2 = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+	z1 = ReadZReg(bcs, HFC_Z1 | HFC_REC | HFC_CHANNEL(bcs->channel));
+	z2 = ReadZReg(bcs, HFC_Z2 | HFC_REC | HFC_CHANNEL(bcs->channel));
+	cnt = 32;
+	while (((f1 != f2) || (z1 != z2)) && cnt--) {
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc clear %d f1(%d) f2(%d)",
+				bcs->channel, f1, f2);
+		rcnt = z1 - z2;
+		if (rcnt < 0)
+			rcnt += cs->hw.hfc.fifosize;
+		if (rcnt)
+			rcnt++;
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc clear %d z1(%x) z2(%x) cnt(%d)",
+				bcs->channel, z1, z2, rcnt);
+		cip = HFC_CIP | HFC_FIFO_OUT | HFC_REC | HFC_CHANNEL(bcs->channel);
+		idx = 0;
+		while ((idx < rcnt) && WaitNoBusy(cs)) {
+			cs->BC_Read_Reg(cs, HFC_DATA_NODEB, cip);
+			idx++;
+		}
+		if (f1 != f2) {
+			WaitNoBusy(cs);
+			cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC |
+					HFC_CHANNEL(bcs->channel));
+			WaitForBusy(cs);
+		}
+		cip = HFC_CIP | HFC_F1 | HFC_REC | HFC_CHANNEL(bcs->channel);
+		WaitNoBusy(cs);
+		f1 = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+		cip = HFC_CIP | HFC_F2 | HFC_REC | HFC_CHANNEL(bcs->channel);
+		WaitNoBusy(cs);
+		f2 = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+		z1 = ReadZReg(bcs, HFC_Z1 | HFC_REC | HFC_CHANNEL(bcs->channel));
+		z2 = ReadZReg(bcs, HFC_Z2 | HFC_REC | HFC_CHANNEL(bcs->channel));
+	}
+	restore_flags(flags);
+	return;
+}
+
+
+static struct sk_buff
+*
+hfc_empty_fifo(struct BCState *bcs, int count)
+{
+	u_char *ptr;
+	struct sk_buff *skb;
+	struct IsdnCardState *cs = bcs->cs;
+	int idx;
+	int chksum;
+	u_char stat, cip;
+
+	if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
+		debugl1(cs, "hfc_empty_fifo");
+	idx = 0;
+	if (count > HSCX_BUFMAX + 3) {
+		if (cs->debug & L1_DEB_WARN)
+			debugl1(cs, "hfc_empty_fifo: incoming packet too large");
+		cip = HFC_CIP | HFC_FIFO_OUT | HFC_REC | HFC_CHANNEL(bcs->channel);
+		while ((idx++ < count) && WaitNoBusy(cs))
+			cs->BC_Read_Reg(cs, HFC_DATA_NODEB, cip);
+		WaitNoBusy(cs);
+		stat = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC |
+				       HFC_CHANNEL(bcs->channel));
+		WaitForBusy(cs);
+		return (NULL);
+	}
+	if (count < 4) {
+		if (cs->debug & L1_DEB_WARN)
+			debugl1(cs, "hfc_empty_fifo: incoming packet too small");
+		cip = HFC_CIP | HFC_FIFO_OUT | HFC_REC | HFC_CHANNEL(bcs->channel);
+		while ((idx++ < count) && WaitNoBusy(cs))
+			cs->BC_Read_Reg(cs, HFC_DATA_NODEB, cip);
+		WaitNoBusy(cs);
+		stat = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC |
+				       HFC_CHANNEL(bcs->channel));
+		WaitForBusy(cs);
+		return (NULL);
+	}
+	if (!(skb = dev_alloc_skb(count - 3)))
+		printk(KERN_WARNING "HFC: receive out of memory\n");
+	else {
+		SET_SKB_FREE(skb);
+		ptr = skb_put(skb, count - 3);
+		idx = 0;
+		cip = HFC_CIP | HFC_FIFO_OUT | HFC_REC | HFC_CHANNEL(bcs->channel);
+		while ((idx < count - 3) && WaitNoBusy(cs)) {
+			*ptr++ = cs->BC_Read_Reg(cs, HFC_DATA_NODEB, cip);
+			idx++;
+		}
+		if (idx != count - 3) {
+			debugl1(cs, "RFIFO BUSY error");
+			printk(KERN_WARNING "HFC FIFO channel %d BUSY Error\n", bcs->channel);
+			dev_kfree_skb(skb, FREE_READ);
+			WaitNoBusy(cs);
+			stat = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC |
+					       HFC_CHANNEL(bcs->channel));
+			WaitForBusy(cs);
+			return (NULL);
+		}
+		WaitNoBusy(cs);
+		chksum = (cs->BC_Read_Reg(cs, HFC_DATA, cip) << 8);
+		WaitNoBusy(cs);
+		chksum += cs->BC_Read_Reg(cs, HFC_DATA, cip);
+		WaitNoBusy(cs);
+		stat = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc_empty_fifo %d chksum %x stat %x",
+				bcs->channel, chksum, stat);
+		if (stat) {
+			debugl1(cs, "FIFO CRC error");
+			dev_kfree_skb(skb, FREE_READ);
+			skb = NULL;
+		}
+		WaitNoBusy(cs);
+		stat = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC |
+				       HFC_CHANNEL(bcs->channel));
+		WaitForBusy(cs);
+	}
+	return (skb);
+}
+
+static void
+hfc_fill_fifo(struct BCState *bcs)
+{
+	struct IsdnCardState *cs = bcs->cs;
+	long flags;
+	int idx, fcnt;
+	int count;
+	u_char cip;
+
+	if (!bcs->tx_skb)
+		return;
+	if (bcs->tx_skb->len <= 0)
+		return;
+
+	save_flags(flags);
+	cli();
+	cip = HFC_CIP | HFC_F1 | HFC_SEND | HFC_CHANNEL(bcs->channel);
+	if ((cip & 0xc3) != (cs->hw.hfc.cip & 0xc3)) {
+		cs->BC_Write_Reg(cs, HFC_STATUS, cip, cip);
+		WaitForBusy(cs);
+	}
+	WaitNoBusy(cs);
+	bcs->hw.hfc.f1 = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+	cip = HFC_CIP | HFC_F2 | HFC_SEND | HFC_CHANNEL(bcs->channel);
+	WaitNoBusy(cs);
+	bcs->hw.hfc.f2 = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+	bcs->hw.hfc.send[bcs->hw.hfc.f1] = ReadZReg(bcs, HFC_Z1 | HFC_SEND | HFC_CHANNEL(bcs->channel));
+	if (cs->debug & L1_DEB_HSCX)
+		debugl1(cs, "hfc_fill_fifo %d f1(%d) f2(%d) z1(%x)",
+			bcs->channel, bcs->hw.hfc.f1, bcs->hw.hfc.f2,
+			bcs->hw.hfc.send[bcs->hw.hfc.f1]);
+	fcnt = bcs->hw.hfc.f1 - bcs->hw.hfc.f2;
+	if (fcnt < 0)
+		fcnt += 32;
+	if (fcnt > 30) {
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc_fill_fifo more as 30 frames");
+		restore_flags(flags);
+		return;
+	}
+	count = GetFreeFifoBytes(bcs);
+	if (cs->debug & L1_DEB_HSCX)
+		debugl1(cs, "hfc_fill_fifo %d count(%ld/%d)",
+			bcs->channel, bcs->tx_skb->len,
+			count);
+	if (count < bcs->tx_skb->len) {
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc_fill_fifo no fifo mem");
+		restore_flags(flags);
+		return;
+	}
+	cip = HFC_CIP | HFC_FIFO_IN | HFC_SEND | HFC_CHANNEL(bcs->channel);
+	idx = 0;
+	while ((idx < bcs->tx_skb->len) && WaitNoBusy(cs))
+		cs->BC_Write_Reg(cs, HFC_DATA_NODEB, cip, bcs->tx_skb->data[idx++]);
+	if (idx != bcs->tx_skb->len) {
+		debugl1(cs, "FIFO Send BUSY error");
+		printk(KERN_WARNING "HFC S FIFO channel %d BUSY Error\n", bcs->channel);
+	} else {
+		count =  bcs->tx_skb->len;
+		bcs->tx_cnt -= count;
+		if (PACKET_NOACK == bcs->tx_skb->pkt_type)
+			count = -1;
+		dev_kfree_skb(bcs->tx_skb, FREE_WRITE);
+		bcs->tx_skb = NULL;
+		WaitForBusy(cs);
+		WaitNoBusy(cs);
+		cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F1_INC | HFC_SEND | HFC_CHANNEL(bcs->channel));
+		if (bcs->st->lli.l1writewakeup && (count >= 0))
+			bcs->st->lli.l1writewakeup(bcs->st, count);
+		test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+	}
+	restore_flags(flags);
+	return;
+}
+
+void
+main_irq_hfc(struct BCState *bcs)
+{
+	long flags;
+	struct IsdnCardState *cs = bcs->cs;
+	int z1, z2, rcnt;
+	u_char f1, f2, cip;
+	int receive, transmit, count = 5;
+	struct sk_buff *skb;
+
+	save_flags(flags);
+      Begin:
+	cli();
+	count--;
+	cip = HFC_CIP | HFC_F1 | HFC_REC | HFC_CHANNEL(bcs->channel);
+	if ((cip & 0xc3) != (cs->hw.hfc.cip & 0xc3)) {
+		cs->BC_Write_Reg(cs, HFC_STATUS, cip, cip);
+		WaitForBusy(cs);
+	}
+	WaitNoBusy(cs);
+	f1 = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+	cip = HFC_CIP | HFC_F2 | HFC_REC | HFC_CHANNEL(bcs->channel);
+	WaitNoBusy(cs);
+	f2 = cs->BC_Read_Reg(cs, HFC_DATA, cip);
+	if (f1 != f2) {
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc rec %d f1(%d) f2(%d)",
+				bcs->channel, f1, f2);
+		WaitForBusy(cs);
+		z1 = ReadZReg(bcs, HFC_Z1 | HFC_REC | HFC_CHANNEL(bcs->channel));
+		z2 = ReadZReg(bcs, HFC_Z2 | HFC_REC | HFC_CHANNEL(bcs->channel));
+		rcnt = z1 - z2;
+		if (rcnt < 0)
+			rcnt += cs->hw.hfc.fifosize;
+		rcnt++;
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc rec %d z1(%x) z2(%x) cnt(%d)",
+				bcs->channel, z1, z2, rcnt);
+/*              sti(); */
+		if ((skb = hfc_empty_fifo(bcs, rcnt))) {
+			skb_queue_tail(&bcs->rqueue, skb);
+			hfc_sched_event(bcs, B_RCVBUFREADY);
+		}
+		receive = 1;
+	} else
+		receive = 0;
+	restore_flags(flags);
+	udelay(1);
+	cli();
+	if (bcs->tx_skb) {
+		transmit = 1;
+		test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
+		hfc_fill_fifo(bcs);
+		if (test_bit(BC_FLG_BUSY, &bcs->Flag))
+			transmit = 0;
+	} else {
+		if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
+			transmit = 1;
+			test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
+			hfc_fill_fifo(bcs);
+			if (test_bit(BC_FLG_BUSY, &bcs->Flag))
+				transmit = 0;
+		} else {
+			transmit = 0;
+			hfc_sched_event(bcs, B_XMTBUFREADY);
+		}
+	}
+	restore_flags(flags);
+	if ((receive || transmit) && count)
+		goto Begin;
+	return;
+}
+
+void
+mode_hfc(struct BCState *bcs, int mode, int bc)
+{
+	struct IsdnCardState *cs = bcs->cs;
+
+	if (cs->debug & L1_DEB_HSCX)
+		debugl1(cs, "HFC 2BS0 mode %d bchan %d/%d",
+			mode, bc, bcs->channel);
+	bcs->mode = mode;
+	bcs->channel = bc;
+
+	switch (mode) {
+		case (L1_MODE_NULL):
+			if (bc)
+				cs->hw.hfc.isac_spcr &= ~0x03;
+			else
+				cs->hw.hfc.isac_spcr &= ~0x0c;
+			break;
+		case (L1_MODE_TRANS):
+			if (bc) {
+				cs->hw.hfc.ctmt |= 1;
+				cs->hw.hfc.isac_spcr &= ~0x03;
+				cs->hw.hfc.isac_spcr |= 0x02;
+			} else {
+				cs->hw.hfc.ctmt |= 2;
+				cs->hw.hfc.isac_spcr &= ~0x0c;
+				cs->hw.hfc.isac_spcr |= 0x08;
+			}
+			break;
+		case (L1_MODE_HDLC):
+			if (bc) {
+				cs->hw.hfc.ctmt &= ~1;
+				cs->hw.hfc.isac_spcr &= ~0x03;
+				cs->hw.hfc.isac_spcr |= 0x02;
+			} else {
+				cs->hw.hfc.ctmt &= ~2;
+				cs->hw.hfc.isac_spcr &= ~0x0c;
+				cs->hw.hfc.isac_spcr |= 0x08;
+			}
+			break;
+	}
+	cs->BC_Write_Reg(cs, HFC_STATUS, cs->hw.hfc.ctmt, cs->hw.hfc.ctmt);
+	cs->writeisac(cs, ISAC_SPCR, cs->hw.hfc.isac_spcr);
+	if (mode)
+		hfc_clear_fifo(bcs);
+}
+
+static void
+hfc_l2l1(struct PStack *st, int pr, void *arg)
+{
+	struct sk_buff *skb = arg;
+	long flags;
+
+	switch (pr) {
+		case (PH_DATA | REQUEST):
+			save_flags(flags);
+			cli();
+			if (st->l1.bcs->tx_skb) {
+				skb_queue_tail(&st->l1.bcs->squeue, skb);
+				restore_flags(flags);
+			} else {
+				st->l1.bcs->tx_skb = skb;
+				test_and_set_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
+				st->l1.bcs->cs->BC_Send_Data(st->l1.bcs);
+				restore_flags(flags);
+			}
+			break;
+		case (PH_PULL | INDICATION):
+			if (st->l1.bcs->tx_skb) {
+				printk(KERN_WARNING "hfc_l2l1: this shouldn't happen\n");
+				break;
+			}
+			save_flags(flags);
+			cli();
+			test_and_set_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
+			st->l1.bcs->tx_skb = skb;
+			st->l1.bcs->cs->BC_Send_Data(st->l1.bcs);
+			restore_flags(flags);
+			break;
+		case (PH_PULL | REQUEST):
+			if (!st->l1.bcs->tx_skb) {
+				test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
+				st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
+			} else
+				test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
+			break;
+		case (PH_ACTIVATE | REQUEST):
+			test_and_set_bit(BC_FLG_ACTIV, &st->l1.bcs->Flag);
+			mode_hfc(st->l1.bcs, st->l1.mode, st->l1.bc);
+			l1_msg_b(st, pr, arg);
+			break;
+		case (PH_DEACTIVATE | REQUEST):
+			l1_msg_b(st, pr, arg);
+			break;
+		case (PH_DEACTIVATE | CONFIRM):
+			test_and_clear_bit(BC_FLG_ACTIV, &st->l1.bcs->Flag);
+			test_and_clear_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
+			mode_hfc(st->l1.bcs, 0, st->l1.bc);
+			st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
+			break;
+	}
+}
+
+
+void
+close_hfcstate(struct BCState *bcs)
+{
+	mode_hfc(bcs, 0, bcs->channel);
+	if (test_bit(BC_FLG_INIT, &bcs->Flag)) {
+		discard_queue(&bcs->rqueue);
+		discard_queue(&bcs->squeue);
+		if (bcs->tx_skb) {
+			dev_kfree_skb(bcs->tx_skb, FREE_WRITE);
+			bcs->tx_skb = NULL;
+			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+		}
+	}
+	test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
+}
+
+static int
+open_hfcstate(struct IsdnCardState *cs, struct BCState *bcs)
+{
+	if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
+		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->tx_cnt = 0;
+	return (0);
+}
+
+int
+setstack_hfc(struct PStack *st, struct BCState *bcs)
+{
+	bcs->channel = st->l1.bc;
+	if (open_hfcstate(st->l1.hardware, bcs))
+		return (-1);
+	st->l1.bcs = bcs;
+	st->l2.l2l1 = hfc_l2l1;
+	setstack_manager(st);
+	bcs->st = st;
+	setstack_l1_B(st);
+	return (0);
+}
+
+__initfunc(void
+init_send(struct BCState *bcs))
+{
+	int i;
+
+	if (!(bcs->hw.hfc.send = kmalloc(32 * sizeof(unsigned int), GFP_ATOMIC))) {
+		printk(KERN_WARNING
+		       "HiSax: No memory for hfc.send\n");
+		return;
+	}
+	for (i = 0; i < 32; i++)
+		bcs->hw.hfc.send[i] = 0x1fff;
+}
+
+__initfunc(void
+inithfc(struct IsdnCardState *cs))
+{
+	init_send(&cs->bcs[0]);
+	init_send(&cs->bcs[1]);
+	cs->BC_Send_Data = &hfc_fill_fifo;
+	cs->bcs[0].BC_SetStack = setstack_hfc;
+	cs->bcs[1].BC_SetStack = setstack_hfc;
+	cs->bcs[0].BC_Close = close_hfcstate;
+	cs->bcs[1].BC_Close = close_hfcstate;
+	mode_hfc(cs->bcs, 0, 0);
+	mode_hfc(cs->bcs + 1, 0, 0);
+}
+
+void
+releasehfc(struct IsdnCardState *cs)
+{
+	if (cs->bcs[0].hw.hfc.send) {
+		kfree(cs->bcs[0].hw.hfc.send);
+		cs->bcs[0].hw.hfc.send = NULL;
+	}
+	if (cs->bcs[1].hw.hfc.send) {
+		kfree(cs->bcs[1].hw.hfc.send);
+		cs->bcs[1].hw.hfc.send = NULL;
+	}
+}