Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1082 insertions, 0 deletions

diff --git a/drivers/isdn/hisax/hfc_2bds0.c b/drivers/isdn/hisax/hfc_2bds0.c
new file mode 100644
index 000000000000..ebea3feef003
--- /dev/null
+++ b/drivers/isdn/hisax/hfc_2bds0.c
@@ -0,0 +1,1082 @@
+/* $Id: hfc_2bds0.c,v 1.18.2.6 2004/02/11 13:21:33 keil Exp $
+ *
+ * specific routines for CCD's HFC 2BDS0
+ *
+ * Author       Karsten Keil
+ * Copyright    by Karsten Keil      <keil@isdn4linux.de>
+ * 
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+
+#include <linux/init.h>
+#include "hisax.h"
+#include "hfc_2bds0.h"
+#include "isdnl1.h"
+#include <linux/interrupt.h>
+/*
+#define KDEBUG_DEF
+#include "kdebug.h"
+*/
+
+#define byteout(addr,val) outb(val,addr)
+#define bytein(addr) inb(addr)
+
+static void
+dummyf(struct IsdnCardState *cs, u_char * data, int size)
+{
+	printk(KERN_WARNING "HiSax: hfcd dummy fifo called\n");
+}
+
+static inline u_char
+ReadReg(struct IsdnCardState *cs, int data, u_char reg)
+{
+	register u_char ret;
+
+	if (data) {
+		if (cs->hw.hfcD.cip != reg) { 
+			cs->hw.hfcD.cip = reg;
+			byteout(cs->hw.hfcD.addr | 1, reg);
+		}
+		ret = bytein(cs->hw.hfcD.addr);
+#ifdef HFC_REG_DEBUG
+		if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
+			debugl1(cs, "t3c RD %02x %02x", reg, ret);
+#endif
+	} else
+		ret = bytein(cs->hw.hfcD.addr | 1);
+	return (ret);
+}
+
+static inline void
+WriteReg(struct IsdnCardState *cs, int data, u_char reg, u_char value)
+{
+	if (cs->hw.hfcD.cip != reg) { 
+		cs->hw.hfcD.cip = reg;
+		byteout(cs->hw.hfcD.addr | 1, reg);
+	}
+	if (data)
+		byteout(cs->hw.hfcD.addr, value);
+#ifdef HFC_REG_DEBUG
+	if (cs->debug & L1_DEB_HSCX_FIFO && (data != HFCD_DATA_NODEB))
+		debugl1(cs, "t3c W%c %02x %02x", data ? 'D' : 'C', reg, value);
+#endif
+}
+
+/* Interface functions */
+
+static u_char
+readreghfcd(struct IsdnCardState *cs, u_char offset)
+{
+	return(ReadReg(cs, HFCD_DATA, offset));
+}
+
+static void
+writereghfcd(struct IsdnCardState *cs, u_char offset, u_char value)
+{
+	WriteReg(cs, HFCD_DATA, offset, value);
+}
+
+static inline int
+WaitForBusy(struct IsdnCardState *cs)
+{
+	int to = 130;
+
+	while (!(ReadReg(cs, HFCD_DATA, HFCD_STAT) & HFCD_BUSY) && to) {
+		udelay(1);
+		to--;
+	}
+	if (!to)
+		printk(KERN_WARNING "HiSax: WaitForBusy timeout\n");
+	return (to);
+}
+
+static inline int
+WaitNoBusy(struct IsdnCardState *cs)
+{
+	int to = 130;
+
+	while ((ReadReg(cs, HFCD_STATUS, HFCD_STATUS) & HFCD_BUSY) && to) {
+		udelay(1);
+		to--;
+	}
+	if (!to) 
+		printk(KERN_WARNING "HiSax: WaitNoBusy timeout\n");
+	return (to);
+}
+
+static int
+SelFiFo(struct IsdnCardState *cs, u_char FiFo)
+{
+	u_char cip;
+
+	if (cs->hw.hfcD.fifo == FiFo)
+		return(1);
+	switch(FiFo) {
+		case 0: cip = HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_B1;
+			break;
+		case 1: cip = HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_B1;
+			break;
+		case 2: cip = HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_B2;
+			break;
+		case 3: cip = HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_B2;
+			break;
+		case 4: cip = HFCD_FIFO | HFCD_Z1 | HFCD_SEND;
+			break;
+		case 5: cip = HFCD_FIFO | HFCD_Z1 | HFCD_REC;
+			break;
+		default:
+			debugl1(cs, "SelFiFo Error");
+			return(0);
+	}
+	cs->hw.hfcD.fifo = FiFo;
+	WaitNoBusy(cs);
+	cs->BC_Write_Reg(cs, HFCD_DATA, cip, 0);
+	WaitForBusy(cs);
+	return(2);
+}
+
+static int
+GetFreeFifoBytes_B(struct BCState *bcs)
+{
+	int s;
+
+	if (bcs->hw.hfc.f1 == bcs->hw.hfc.f2)
+		return (bcs->cs->hw.hfcD.bfifosize);
+	s = bcs->hw.hfc.send[bcs->hw.hfc.f1] - bcs->hw.hfc.send[bcs->hw.hfc.f2];
+	if (s <= 0)
+		s += bcs->cs->hw.hfcD.bfifosize;
+	s = bcs->cs->hw.hfcD.bfifosize - s;
+	return (s);
+}
+
+static int
+GetFreeFifoBytes_D(struct IsdnCardState *cs)
+{
+	int s;
+
+	if (cs->hw.hfcD.f1 == cs->hw.hfcD.f2)
+		return (cs->hw.hfcD.dfifosize);
+	s = cs->hw.hfcD.send[cs->hw.hfcD.f1] - cs->hw.hfcD.send[cs->hw.hfcD.f2];
+	if (s <= 0)
+		s += cs->hw.hfcD.dfifosize;
+	s = cs->hw.hfcD.dfifosize - s;
+	return (s);
+}
+
+static int
+ReadZReg(struct IsdnCardState *cs, u_char reg)
+{
+	int val;
+
+	WaitNoBusy(cs);
+	val = 256 * ReadReg(cs, HFCD_DATA, reg | HFCB_Z_HIGH);
+	WaitNoBusy(cs);
+	val += ReadReg(cs, HFCD_DATA, reg | HFCB_Z_LOW);
+	return (val);
+}
+
+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 = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
+		while (idx++ < count) {
+			WaitNoBusy(cs);
+			ReadReg(cs, HFCD_DATA_NODEB, cip);
+		}
+		skb = NULL;
+	} else if (count < 4) {
+		if (cs->debug & L1_DEB_WARN)
+			debugl1(cs, "hfc_empty_fifo: incoming packet too small");
+		cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
+#ifdef ERROR_STATISTIC
+		bcs->err_inv++;
+#endif
+		while ((idx++ < count) && WaitNoBusy(cs))
+			ReadReg(cs, HFCD_DATA_NODEB, cip);
+		skb = NULL;
+	} else if (!(skb = dev_alloc_skb(count - 3)))
+		printk(KERN_WARNING "HFC: receive out of memory\n");
+	else {
+		ptr = skb_put(skb, count - 3);
+		idx = 0;
+		cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
+		while (idx < (count - 3)) {
+			if (!WaitNoBusy(cs))
+				break;
+			*ptr = ReadReg(cs,  HFCD_DATA_NODEB, cip);
+			ptr++;
+			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_irq(skb);
+			skb = NULL;
+		} else {
+			WaitNoBusy(cs);
+			chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
+			WaitNoBusy(cs);
+			chksum += ReadReg(cs, HFCD_DATA, cip);
+			WaitNoBusy(cs);
+			stat = ReadReg(cs, HFCD_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_irq(skb);
+				skb = NULL;
+#ifdef ERROR_STATISTIC
+				bcs->err_crc++;
+#endif
+			}
+		}
+	}
+	WaitForBusy(cs);
+	WaitNoBusy(cs);
+	stat = ReadReg(cs, HFCD_DATA, HFCB_FIFO | HFCB_F2_INC |
+		HFCB_REC | HFCB_CHANNEL(bcs->channel));
+	WaitForBusy(cs);
+	return (skb);
+}
+
+static void
+hfc_fill_fifo(struct BCState *bcs)
+{
+	struct IsdnCardState *cs = bcs->cs;
+	int idx, fcnt;
+	int count;
+	u_char cip;
+
+	if (!bcs->tx_skb)
+		return;
+	if (bcs->tx_skb->len <= 0)
+		return;
+	SelFiFo(cs, HFCB_SEND | HFCB_CHANNEL(bcs->channel)); 
+	cip = HFCB_FIFO | HFCB_F1 | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
+	WaitNoBusy(cs);
+	bcs->hw.hfc.f1 = ReadReg(cs, HFCD_DATA, cip);
+	WaitNoBusy(cs);
+	cip = HFCB_FIFO | HFCB_F2 | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
+	WaitNoBusy(cs);
+	bcs->hw.hfc.f2 = ReadReg(cs, HFCD_DATA, cip);
+	bcs->hw.hfc.send[bcs->hw.hfc.f1] = ReadZReg(cs, HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_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");
+		return;
+	}
+	count = GetFreeFifoBytes_B(bcs);
+	if (cs->debug & L1_DEB_HSCX)
+		debugl1(cs, "hfc_fill_fifo %d count(%ld/%d),%lx",
+			bcs->channel, bcs->tx_skb->len,
+			count, current->state);
+	if (count < bcs->tx_skb->len) {
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc_fill_fifo no fifo mem");
+		return;
+	}
+	cip = HFCB_FIFO | HFCB_FIFO_IN | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
+	idx = 0;
+	WaitForBusy(cs);
+	WaitNoBusy(cs);
+	WriteReg(cs, HFCD_DATA_NODEB, cip, bcs->tx_skb->data[idx++]);
+	while (idx < bcs->tx_skb->len) {
+		if (!WaitNoBusy(cs))
+			break;
+		WriteReg(cs, HFCD_DATA_NODEB, cip, bcs->tx_skb->data[idx]);
+		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 {
+		bcs->tx_cnt -= bcs->tx_skb->len;
+		if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
+			(PACKET_NOACK != bcs->tx_skb->pkt_type)) {
+			u_long	flags;
+			spin_lock_irqsave(&bcs->aclock, flags);
+			bcs->ackcnt += bcs->tx_skb->len;
+			spin_unlock_irqrestore(&bcs->aclock, flags);
+			schedule_event(bcs, B_ACKPENDING);
+		}
+		dev_kfree_skb_any(bcs->tx_skb);
+		bcs->tx_skb = NULL;
+	}
+	WaitForBusy(cs);
+	WaitNoBusy(cs);
+	ReadReg(cs, HFCD_DATA, HFCB_FIFO | HFCB_F1_INC | HFCB_SEND | HFCB_CHANNEL(bcs->channel));
+	WaitForBusy(cs);
+	test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+	return;
+}
+
+static void
+hfc_send_data(struct BCState *bcs)
+{
+	struct IsdnCardState *cs = bcs->cs;
+	
+	if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+		hfc_fill_fifo(bcs);
+		test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+	} else
+		debugl1(cs,"send_data %d blocked", bcs->channel);
+}
+
+void
+main_rec_2bds0(struct BCState *bcs)
+{
+	struct IsdnCardState *cs = bcs->cs;
+	int z1, z2, rcnt;
+	u_char f1, f2, cip;
+	int receive, count = 5;
+	struct sk_buff *skb;
+
+    Begin:
+	count--;
+	if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+		debugl1(cs,"rec_data %d blocked", bcs->channel);
+		return;
+	}
+	SelFiFo(cs, HFCB_REC | HFCB_CHANNEL(bcs->channel));
+	cip = HFCB_FIFO | HFCB_F1 | HFCB_REC | HFCB_CHANNEL(bcs->channel);
+	WaitNoBusy(cs);
+	f1 = ReadReg(cs, HFCD_DATA, cip);
+	cip = HFCB_FIFO | HFCB_F2 | HFCB_REC | HFCB_CHANNEL(bcs->channel);
+	WaitNoBusy(cs);
+	f2 = ReadReg(cs, HFCD_DATA, cip);
+	if (f1 != f2) {
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc rec %d f1(%d) f2(%d)",
+				bcs->channel, f1, f2);
+		z1 = ReadZReg(cs, HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_CHANNEL(bcs->channel));
+		z2 = ReadZReg(cs, HFCB_FIFO | HFCB_Z2 | HFCB_REC | HFCB_CHANNEL(bcs->channel));
+		rcnt = z1 - z2;
+		if (rcnt < 0)
+			rcnt += cs->hw.hfcD.bfifosize;
+		rcnt++;
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc rec %d z1(%x) z2(%x) cnt(%d)",
+				bcs->channel, z1, z2, rcnt);
+		if ((skb = hfc_empty_fifo(bcs, rcnt))) {
+			skb_queue_tail(&bcs->rqueue, skb);
+			schedule_event(bcs, B_RCVBUFREADY);
+		}
+		rcnt = f1 -f2;
+		if (rcnt<0)
+			rcnt += 32;
+		if (rcnt>1)
+			receive = 1;
+		else
+			receive = 0;
+	} else
+		receive = 0;
+	test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+	if (count && receive)
+		goto Begin;	
+	return;
+}
+
+void
+mode_2bs0(struct BCState *bcs, int mode, int bc)
+{
+	struct IsdnCardState *cs = bcs->cs;
+
+	if (cs->debug & L1_DEB_HSCX)
+		debugl1(cs, "HFCD bchannel 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.hfcD.conn |= 0x18;
+				cs->hw.hfcD.sctrl &= ~SCTRL_B2_ENA;
+			} else {
+				cs->hw.hfcD.conn |= 0x3;
+				cs->hw.hfcD.sctrl &= ~SCTRL_B1_ENA;
+			}
+			break;
+		case (L1_MODE_TRANS):
+			if (bc) {
+				cs->hw.hfcD.ctmt |= 2;
+				cs->hw.hfcD.conn &= ~0x18;
+				cs->hw.hfcD.sctrl |= SCTRL_B2_ENA;
+			} else {
+				cs->hw.hfcD.ctmt |= 1;
+				cs->hw.hfcD.conn &= ~0x3;
+				cs->hw.hfcD.sctrl |= SCTRL_B1_ENA;
+			}
+			break;
+		case (L1_MODE_HDLC):
+			if (bc) {
+				cs->hw.hfcD.ctmt &= ~2;
+				cs->hw.hfcD.conn &= ~0x18;
+				cs->hw.hfcD.sctrl |= SCTRL_B2_ENA;
+			} else {
+				cs->hw.hfcD.ctmt &= ~1;
+				cs->hw.hfcD.conn &= ~0x3;
+				cs->hw.hfcD.sctrl |= SCTRL_B1_ENA;
+			}
+			break;
+	}
+	WriteReg(cs, HFCD_DATA, HFCD_SCTRL, cs->hw.hfcD.sctrl);
+	WriteReg(cs, HFCD_DATA, HFCD_CTMT, cs->hw.hfcD.ctmt);
+	WriteReg(cs, HFCD_DATA, HFCD_CONN, cs->hw.hfcD.conn);
+}
+
+static void
+hfc_l2l1(struct PStack *st, int pr, void *arg)
+{
+	struct BCState *bcs = st->l1.bcs;
+	struct sk_buff *skb = arg;
+	u_long flags;
+
+	switch (pr) {
+		case (PH_DATA | REQUEST):
+			spin_lock_irqsave(&bcs->cs->lock, flags);
+			if (bcs->tx_skb) {
+				skb_queue_tail(&bcs->squeue, skb);
+			} else {
+				bcs->tx_skb = skb;
+//				test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
+				bcs->cs->BC_Send_Data(bcs);
+			}
+			spin_unlock_irqrestore(&bcs->cs->lock, flags);
+			break;
+		case (PH_PULL | INDICATION):
+			spin_lock_irqsave(&bcs->cs->lock, flags);
+			if (bcs->tx_skb) {
+				printk(KERN_WARNING "hfc_l2l1: this shouldn't happen\n");
+			} else {
+//				test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
+				bcs->tx_skb = skb;
+				bcs->cs->BC_Send_Data(bcs);
+			}
+			spin_unlock_irqrestore(&bcs->cs->lock, flags);
+			break;
+		case (PH_PULL | REQUEST):
+			if (!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):
+			spin_lock_irqsave(&bcs->cs->lock, flags);
+			test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
+			mode_2bs0(bcs, st->l1.mode, st->l1.bc);
+			spin_unlock_irqrestore(&bcs->cs->lock, flags);
+			l1_msg_b(st, pr, arg);
+			break;
+		case (PH_DEACTIVATE | REQUEST):
+			l1_msg_b(st, pr, arg);
+			break;
+		case (PH_DEACTIVATE | CONFIRM):
+			spin_lock_irqsave(&bcs->cs->lock, flags);
+			test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
+			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+			mode_2bs0(bcs, 0, st->l1.bc);
+			spin_unlock_irqrestore(&bcs->cs->lock, flags);
+			st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
+			break;
+	}
+}
+
+void
+close_2bs0(struct BCState *bcs)
+{
+	mode_2bs0(bcs, 0, bcs->channel);
+	if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
+		skb_queue_purge(&bcs->rqueue);
+		skb_queue_purge(&bcs->squeue);
+		if (bcs->tx_skb) {
+			dev_kfree_skb_any(bcs->tx_skb);
+			bcs->tx_skb = NULL;
+			test_and_clear_bit(BC_FLG_BUSY, &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_2b(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);
+}
+
+static void
+hfcd_bh(struct IsdnCardState *cs)
+{
+	if (!cs)
+		return;
+	if (test_and_clear_bit(D_L1STATECHANGE, &cs->event)) {
+		switch (cs->dc.hfcd.ph_state) {
+			case (0):
+				l1_msg(cs, HW_RESET | INDICATION, NULL);
+				break;
+			case (3):
+				l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
+				break;
+			case (8):
+				l1_msg(cs, HW_RSYNC | INDICATION, NULL);
+				break;
+			case (6):
+				l1_msg(cs, HW_INFO2 | INDICATION, NULL);
+				break;
+			case (7):
+				l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
+				break;
+			default:
+				break;
+		}
+	}
+	if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
+		DChannel_proc_rcv(cs);
+	if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
+		DChannel_proc_xmt(cs);
+}
+
+static
+int receive_dmsg(struct IsdnCardState *cs)
+{
+	struct sk_buff *skb;
+	int idx;
+	int rcnt, z1, z2;
+	u_char stat, cip, f1, f2;
+	int chksum;
+	int count=5;
+	u_char *ptr;
+
+	if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+		debugl1(cs, "rec_dmsg blocked");
+		return(1);
+	}
+	SelFiFo(cs, 4 | HFCD_REC);
+	cip = HFCD_FIFO | HFCD_F1 | HFCD_REC;
+	WaitNoBusy(cs);
+	f1 = cs->readisac(cs, cip) & 0xf;
+	cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
+	WaitNoBusy(cs);
+	f2 = cs->readisac(cs, cip) & 0xf;
+	while ((f1 != f2) && count--) {
+		z1 = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_REC);
+		z2 = ReadZReg(cs, HFCD_FIFO | HFCD_Z2 | HFCD_REC);
+		rcnt = z1 - z2;
+		if (rcnt < 0)
+			rcnt += cs->hw.hfcD.dfifosize;
+		rcnt++;
+		if (cs->debug & L1_DEB_ISAC)
+			debugl1(cs, "hfcd recd f1(%d) f2(%d) z1(%x) z2(%x) cnt(%d)",
+				f1, f2, z1, z2, rcnt);
+		idx = 0;
+		cip = HFCD_FIFO | HFCD_FIFO_OUT | HFCD_REC;
+		if (rcnt > MAX_DFRAME_LEN + 3) {
+			if (cs->debug & L1_DEB_WARN)
+				debugl1(cs, "empty_fifo d: incoming packet too large");
+			while (idx < rcnt) {
+				if (!(WaitNoBusy(cs)))
+					break;
+				ReadReg(cs, HFCD_DATA_NODEB, cip);
+				idx++;
+			}
+		} else if (rcnt < 4) {
+			if (cs->debug & L1_DEB_WARN)
+				debugl1(cs, "empty_fifo d: incoming packet too small");
+			while ((idx++ < rcnt) && WaitNoBusy(cs))
+				ReadReg(cs, HFCD_DATA_NODEB, cip);
+		} else if ((skb = dev_alloc_skb(rcnt - 3))) {
+			ptr = skb_put(skb, rcnt - 3);
+			while (idx < (rcnt - 3)) {
+				if (!(WaitNoBusy(cs)))
+					break;
+				*ptr = ReadReg(cs, HFCD_DATA_NODEB, cip);
+				idx++;
+				ptr++;
+			}
+			if (idx != (rcnt - 3)) {
+				debugl1(cs, "RFIFO D BUSY error");
+				printk(KERN_WARNING "HFC DFIFO channel BUSY Error\n");
+				dev_kfree_skb_irq(skb);
+				skb = NULL;
+#ifdef ERROR_STATISTIC
+				cs->err_rx++;
+#endif
+			} else {
+				WaitNoBusy(cs);
+				chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
+				WaitNoBusy(cs);
+				chksum += ReadReg(cs, HFCD_DATA, cip);
+				WaitNoBusy(cs);
+				stat = ReadReg(cs, HFCD_DATA, cip);
+				if (cs->debug & L1_DEB_ISAC)
+					debugl1(cs, "empty_dfifo chksum %x stat %x",
+						chksum, stat);
+				if (stat) {
+					debugl1(cs, "FIFO CRC error");
+					dev_kfree_skb_irq(skb);
+					skb = NULL;
+#ifdef ERROR_STATISTIC
+					cs->err_crc++;
+#endif
+				} else {
+					skb_queue_tail(&cs->rq, skb);
+					schedule_event(cs, D_RCVBUFREADY);
+				}
+			}
+		} else
+			printk(KERN_WARNING "HFC: D receive out of memory\n");
+		WaitForBusy(cs);
+		cip = HFCD_FIFO | HFCD_F2_INC | HFCD_REC;
+		WaitNoBusy(cs);
+		stat = ReadReg(cs, HFCD_DATA, cip);
+		WaitForBusy(cs);
+		cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
+		WaitNoBusy(cs);
+		f2 = cs->readisac(cs, cip) & 0xf;
+	}
+	test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+	return(1);
+} 
+
+static void
+hfc_fill_dfifo(struct IsdnCardState *cs)
+{
+	int idx, fcnt;
+	int count;
+	u_char cip;
+
+	if (!cs->tx_skb)
+		return;
+	if (cs->tx_skb->len <= 0)
+		return;
+
+	SelFiFo(cs, 4 | HFCD_SEND);
+	cip = HFCD_FIFO | HFCD_F1 | HFCD_SEND;
+	WaitNoBusy(cs);
+	cs->hw.hfcD.f1 = ReadReg(cs, HFCD_DATA, cip) & 0xf;
+	WaitNoBusy(cs);
+	cip = HFCD_FIFO | HFCD_F2 | HFCD_SEND;
+	cs->hw.hfcD.f2 = ReadReg(cs, HFCD_DATA, cip) & 0xf;
+	cs->hw.hfcD.send[cs->hw.hfcD.f1] = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_SEND);
+	if (cs->debug & L1_DEB_ISAC)
+		debugl1(cs, "hfc_fill_Dfifo f1(%d) f2(%d) z1(%x)",
+			cs->hw.hfcD.f1, cs->hw.hfcD.f2,
+			cs->hw.hfcD.send[cs->hw.hfcD.f1]);
+	fcnt = cs->hw.hfcD.f1 - cs->hw.hfcD.f2;
+	if (fcnt < 0)
+		fcnt += 16;
+	if (fcnt > 14) {
+		if (cs->debug & L1_DEB_HSCX)
+			debugl1(cs, "hfc_fill_Dfifo more as 14 frames");
+		return;
+	}
+	count = GetFreeFifoBytes_D(cs);
+	if (cs->debug & L1_DEB_ISAC)
+		debugl1(cs, "hfc_fill_Dfifo count(%ld/%d)",
+			cs->tx_skb->len, count);
+	if (count < cs->tx_skb->len) {
+		if (cs->debug & L1_DEB_ISAC)
+			debugl1(cs, "hfc_fill_Dfifo no fifo mem");
+		return;
+	}
+	cip = HFCD_FIFO | HFCD_FIFO_IN | HFCD_SEND;
+	idx = 0;
+	WaitForBusy(cs);
+	WaitNoBusy(cs);
+	WriteReg(cs, HFCD_DATA_NODEB, cip, cs->tx_skb->data[idx++]);
+	while (idx < cs->tx_skb->len) {
+		if (!(WaitNoBusy(cs)))
+			break;
+		WriteReg(cs, HFCD_DATA_NODEB, cip, cs->tx_skb->data[idx]);
+		idx++;
+	}
+	if (idx != cs->tx_skb->len) {
+		debugl1(cs, "DFIFO Send BUSY error");
+		printk(KERN_WARNING "HFC S DFIFO channel BUSY Error\n");
+	}
+	WaitForBusy(cs);
+	WaitNoBusy(cs);
+	ReadReg(cs, HFCD_DATA, HFCD_FIFO | HFCD_F1_INC | HFCD_SEND);
+	dev_kfree_skb_any(cs->tx_skb);
+	cs->tx_skb = NULL;
+	WaitForBusy(cs);
+	return;
+}
+
+static 
+struct BCState *Sel_BCS(struct IsdnCardState *cs, int channel)
+{
+	if (cs->bcs[0].mode && (cs->bcs[0].channel == channel))
+		return(&cs->bcs[0]);
+	else if (cs->bcs[1].mode && (cs->bcs[1].channel == channel))
+		return(&cs->bcs[1]);
+	else
+		return(NULL);
+}
+
+void
+hfc2bds0_interrupt(struct IsdnCardState *cs, u_char val)
+{
+       	u_char exval;
+       	struct BCState *bcs;
+	int count=15;
+
+	if (cs->debug & L1_DEB_ISAC)
+		debugl1(cs, "HFCD irq %x %s", val,
+			test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags) ?
+			"locked" : "unlocked");
+	val &= cs->hw.hfcD.int_m1;
+	if (val & 0x40) { /* TE state machine irq */
+		exval = cs->readisac(cs, HFCD_STATES) & 0xf;
+		if (cs->debug & L1_DEB_ISAC)
+			debugl1(cs, "ph_state chg %d->%d", cs->dc.hfcd.ph_state,
+				exval);
+		cs->dc.hfcd.ph_state = exval;
+		schedule_event(cs, D_L1STATECHANGE);
+		val &= ~0x40;
+	}
+	while (val) {
+		if (test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+			cs->hw.hfcD.int_s1 |= val;
+			return;
+		}
+		if (cs->hw.hfcD.int_s1 & 0x18) {
+			exval = val;
+			val =  cs->hw.hfcD.int_s1;
+			cs->hw.hfcD.int_s1 = exval;
+		}	
+		if (val & 0x08) {
+			if (!(bcs=Sel_BCS(cs, 0))) {
+				if (cs->debug)
+					debugl1(cs, "hfcd spurious 0x08 IRQ");
+			} else 
+				main_rec_2bds0(bcs);
+		}
+		if (val & 0x10) {
+			if (!(bcs=Sel_BCS(cs, 1))) {
+				if (cs->debug)
+					debugl1(cs, "hfcd spurious 0x10 IRQ");
+			} else 
+				main_rec_2bds0(bcs);
+		}
+		if (val & 0x01) {
+			if (!(bcs=Sel_BCS(cs, 0))) {
+				if (cs->debug)
+					debugl1(cs, "hfcd spurious 0x01 IRQ");
+			} else {
+				if (bcs->tx_skb) {
+					if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+						hfc_fill_fifo(bcs);
+						test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+					} else
+						debugl1(cs,"fill_data %d blocked", bcs->channel);
+				} else {
+					if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
+						if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+							hfc_fill_fifo(bcs);
+							test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+						} else
+							debugl1(cs,"fill_data %d blocked", bcs->channel);
+					} else {
+						schedule_event(bcs, B_XMTBUFREADY);
+					}
+				}
+			}
+		}
+		if (val & 0x02) {
+			if (!(bcs=Sel_BCS(cs, 1))) {
+				if (cs->debug)
+					debugl1(cs, "hfcd spurious 0x02 IRQ");
+			} else {
+				if (bcs->tx_skb) {
+					if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+						hfc_fill_fifo(bcs);
+						test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+					} else
+						debugl1(cs,"fill_data %d blocked", bcs->channel);
+				} else {
+					if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
+						if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+							hfc_fill_fifo(bcs);
+							test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+						} else
+							debugl1(cs,"fill_data %d blocked", bcs->channel);
+					} else {
+						schedule_event(bcs, B_XMTBUFREADY);
+					}
+				}
+			}
+		}
+		if (val & 0x20) {	/* receive dframe */
+			receive_dmsg(cs);
+		}
+		if (val & 0x04) {	/* dframe transmitted */
+			if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
+				del_timer(&cs->dbusytimer);
+			if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
+				schedule_event(cs, D_CLEARBUSY);
+			if (cs->tx_skb) {
+				if (cs->tx_skb->len) {
+					if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+						hfc_fill_dfifo(cs);
+						test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+					} else {
+						debugl1(cs, "hfc_fill_dfifo irq blocked");
+					}
+					goto afterXPR;
+				} else {
+					dev_kfree_skb_irq(cs->tx_skb);
+					cs->tx_cnt = 0;
+					cs->tx_skb = NULL;
+				}
+			}
+			if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
+				cs->tx_cnt = 0;
+				if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+					hfc_fill_dfifo(cs);
+					test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+				} else {
+					debugl1(cs, "hfc_fill_dfifo irq blocked");
+				}
+			} else
+				schedule_event(cs, D_XMTBUFREADY);
+		}
+      afterXPR:
+		if (cs->hw.hfcD.int_s1 && count--) {
+			val = cs->hw.hfcD.int_s1;
+			cs->hw.hfcD.int_s1 = 0;
+			if (cs->debug & L1_DEB_ISAC)
+				debugl1(cs, "HFCD irq %x loop %d", val, 15-count);
+		} else
+			val = 0;
+	}
+}
+
+static void
+HFCD_l1hw(struct PStack *st, int pr, void *arg)
+{
+	struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
+	struct sk_buff *skb = arg;
+	u_long flags;
+	
+	switch (pr) {
+		case (PH_DATA | REQUEST):
+			if (cs->debug & DEB_DLOG_HEX)
+				LogFrame(cs, skb->data, skb->len);
+			if (cs->debug & DEB_DLOG_VERBOSE)
+				dlogframe(cs, skb, 0);
+			spin_lock_irqsave(&cs->lock, flags);
+			if (cs->tx_skb) {
+				skb_queue_tail(&cs->sq, skb);
+#ifdef L2FRAME_DEBUG		/* psa */
+				if (cs->debug & L1_DEB_LAPD)
+					Logl2Frame(cs, skb, "PH_DATA Queued", 0);
+#endif
+			} else {
+				cs->tx_skb = skb;
+				cs->tx_cnt = 0;
+#ifdef L2FRAME_DEBUG		/* psa */
+				if (cs->debug & L1_DEB_LAPD)
+					Logl2Frame(cs, skb, "PH_DATA", 0);
+#endif
+				if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+					hfc_fill_dfifo(cs);
+					test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+				} else
+					debugl1(cs, "hfc_fill_dfifo blocked");
+
+			}
+			spin_unlock_irqrestore(&cs->lock, flags);
+			break;
+		case (PH_PULL | INDICATION):
+			spin_lock_irqsave(&cs->lock, flags);
+			if (cs->tx_skb) {
+				if (cs->debug & L1_DEB_WARN)
+					debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
+				skb_queue_tail(&cs->sq, skb);
+				spin_unlock_irqrestore(&cs->lock, flags);
+				break;
+			}
+			if (cs->debug & DEB_DLOG_HEX)
+				LogFrame(cs, skb->data, skb->len);
+			if (cs->debug & DEB_DLOG_VERBOSE)
+				dlogframe(cs, skb, 0);
+			cs->tx_skb = skb;
+			cs->tx_cnt = 0;
+#ifdef L2FRAME_DEBUG		/* psa */
+			if (cs->debug & L1_DEB_LAPD)
+				Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
+#endif
+			if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
+				hfc_fill_dfifo(cs);
+				test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
+			} else
+				debugl1(cs, "hfc_fill_dfifo blocked");
+			spin_unlock_irqrestore(&cs->lock, flags);
+			break;
+		case (PH_PULL | REQUEST):
+#ifdef L2FRAME_DEBUG		/* psa */
+			if (cs->debug & L1_DEB_LAPD)
+				debugl1(cs, "-> PH_REQUEST_PULL");
+#endif
+			if (!cs->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 (HW_RESET | REQUEST):
+			spin_lock_irqsave(&cs->lock, flags);
+			cs->writeisac(cs, HFCD_STATES, HFCD_LOAD_STATE | 3); /* HFC ST 3 */
+			udelay(6);
+			cs->writeisac(cs, HFCD_STATES, 3); /* HFC ST 2 */
+			cs->hw.hfcD.mst_m |= HFCD_MASTER;
+			cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
+			cs->writeisac(cs, HFCD_STATES, HFCD_ACTIVATE | HFCD_DO_ACTION);
+			spin_unlock_irqrestore(&cs->lock, flags);
+			l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
+			break;
+		case (HW_ENABLE | REQUEST):
+			spin_lock_irqsave(&cs->lock, flags);
+			cs->writeisac(cs, HFCD_STATES, HFCD_ACTIVATE | HFCD_DO_ACTION);
+			spin_unlock_irqrestore(&cs->lock, flags);
+			break;
+		case (HW_DEACTIVATE | REQUEST):
+			spin_lock_irqsave(&cs->lock, flags);
+			cs->hw.hfcD.mst_m &= ~HFCD_MASTER;
+			cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
+			spin_unlock_irqrestore(&cs->lock, flags);
+			break;
+		case (HW_INFO3 | REQUEST):
+			spin_lock_irqsave(&cs->lock, flags);
+			cs->hw.hfcD.mst_m |= HFCD_MASTER;
+			cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
+			spin_unlock_irqrestore(&cs->lock, flags);
+			break;
+		default:
+			if (cs->debug & L1_DEB_WARN)
+				debugl1(cs, "hfcd_l1hw unknown pr %4x", pr);
+			break;
+	}
+}
+
+void
+setstack_hfcd(struct PStack *st, struct IsdnCardState *cs)
+{
+	st->l1.l1hw = HFCD_l1hw;
+}
+
+static void
+hfc_dbusy_timer(struct IsdnCardState *cs)
+{
+}
+
+unsigned int __init
+*init_send_hfcd(int cnt)
+{
+	int i, *send;
+
+	if (!(send = kmalloc(cnt * sizeof(unsigned int), GFP_ATOMIC))) {
+		printk(KERN_WARNING
+		       "HiSax: No memory for hfcd.send\n");
+		return(NULL);
+	}
+	for (i = 0; i < cnt; i++)
+		send[i] = 0x1fff;
+	return(send);
+}
+
+void __init
+init2bds0(struct IsdnCardState *cs)
+{
+	cs->setstack_d = setstack_hfcd;
+	if (!cs->hw.hfcD.send)
+		cs->hw.hfcD.send = init_send_hfcd(16);
+	if (!cs->bcs[0].hw.hfc.send)
+		cs->bcs[0].hw.hfc.send = init_send_hfcd(32);
+	if (!cs->bcs[1].hw.hfc.send)
+		cs->bcs[1].hw.hfc.send = init_send_hfcd(32);
+	cs->BC_Send_Data = &hfc_send_data;
+	cs->bcs[0].BC_SetStack = setstack_2b;
+	cs->bcs[1].BC_SetStack = setstack_2b;
+	cs->bcs[0].BC_Close = close_2bs0;
+	cs->bcs[1].BC_Close = close_2bs0;
+	mode_2bs0(cs->bcs, 0, 0);
+	mode_2bs0(cs->bcs + 1, 0, 1);
+}
+
+void
+release2bds0(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;
+	}
+	if (cs->hw.hfcD.send) {
+		kfree(cs->hw.hfcD.send);
+		cs->hw.hfcD.send = NULL;
+	}
+}
+
+void
+set_cs_func(struct IsdnCardState *cs)
+{
+	cs->readisac = &readreghfcd;
+	cs->writeisac = &writereghfcd;
+	cs->readisacfifo = &dummyf;
+	cs->writeisacfifo = &dummyf;
+	cs->BC_Read_Reg = &ReadReg;
+	cs->BC_Write_Reg = &WriteReg;
+	cs->dbusytimer.function = (void *) hfc_dbusy_timer;
+	cs->dbusytimer.data = (long) cs;
+	init_timer(&cs->dbusytimer);
+	INIT_WORK(&cs->tqueue, (void *)(void *) hfcd_bh, cs);
+}