patch-2.1.27 linux/drivers/isdn/hisax/avm_a1.c

• Lines: 983
• Date: Tue Feb 25 17:12:49 1997
• Orig file: v2.1.26/linux/drivers/isdn/hisax/avm_a1.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.26/linux/drivers/isdn/hisax/avm_a1.c linux/drivers/isdn/hisax/avm_a1.c
@@ -0,0 +1,982 @@
+/* $Id: avm_a1.c,v 1.4 1997/01/27 15:50:21 keil Exp $
+
+ * avm_a1.c     low level stuff for AVM A1 (Fritz) isdn cards
+ *
+ * Author       Karsten Keil (keil@temic-ech.spacenet.de)
+ *
+ *
+ * $Log: avm_a1.c,v $
+ * Revision 1.4  1997/01/27 15:50:21  keil
+ * SMP proof,cosmetics
+ *
+ * Revision 1.3  1997/01/21 22:14:20  keil
+ * cleanups
+ *
+ * Revision 1.2  1996/10/27 22:07:31  keil
+ * cosmetic changes
+ *
+ * Revision 1.1  1996/10/13 20:04:49  keil
+ * Initial revision
+ *
+ *
+ */
+#define __NO_VERSION__
+#include "siemens.h"
+#include "hisax.h"
+#include "avm_a1.h"
+#include "isdnl1.h"
+#include <linux/kernel_stat.h>
+
+extern const char *CardType[];
+const char *avm_revision = "$Revision: 1.4 $";
+
+#define byteout(addr,val) outb_p(val,addr)
+#define bytein(addr) inb_p(addr)
+
+static inline byte
+readreg(unsigned int adr, byte off)
+{
+	return (bytein(adr + off));
+}
+
+static inline void
+writereg(unsigned int adr, byte off, byte data)
+{
+	byteout(adr + off, data);
+}
+
+
+static inline void
+read_fifo(unsigned int adr, byte * data, int size)
+{
+	insb(adr - 0x400, data, size);
+}
+
+static void
+write_fifo(unsigned int adr, byte * data, int size)
+{
+	outsb(adr - 0x400, data, size);
+}
+
+static inline void
+waitforCEC(int adr)
+{
+	int to = 50;
+
+	while ((readreg(adr, HSCX_STAR) & 0x04) && to) {
+		udelay(1);
+		to--;
+	}
+	if (!to)
+		printk(KERN_WARNING "AVM A1: waitforCEC timeout\n");
+}
+
+
+static inline void
+waitforXFW(int adr)
+{
+	int to = 50;
+
+	while ((!(readreg(adr, HSCX_STAR) & 0x44) == 0x40) && to) {
+		udelay(1);
+		to--;
+	}
+	if (!to)
+		printk(KERN_WARNING "AVM A1: waitforXFW timeout\n");
+}
+static inline void
+writehscxCMDR(int adr, byte data)
+{
+	long flags;
+
+	save_flags(flags);
+	cli();
+	waitforCEC(adr);
+	writereg(adr, HSCX_CMDR, data);
+	restore_flags(flags);
+}
+
+/*
+ * fast interrupt here
+ */
+
+static void
+hscxreport(struct IsdnCardState *sp, int hscx)
+{
+	printk(KERN_DEBUG "HSCX %d\n", hscx);
+	printk(KERN_DEBUG "ISTA %x\n", readreg(sp->hscx[hscx], HSCX_ISTA));
+	printk(KERN_DEBUG "STAR %x\n", readreg(sp->hscx[hscx], HSCX_STAR));
+	printk(KERN_DEBUG "EXIR %x\n", readreg(sp->hscx[hscx], HSCX_EXIR));
+}
+
+void
+avm_a1_report(struct IsdnCardState *sp)
+{
+	printk(KERN_DEBUG "ISAC\n");
+	printk(KERN_DEBUG "ISTA %x\n", readreg(sp->isac, ISAC_ISTA));
+	printk(KERN_DEBUG "STAR %x\n", readreg(sp->isac, ISAC_STAR));
+	printk(KERN_DEBUG "EXIR %x\n", readreg(sp->isac, ISAC_EXIR));
+	hscxreport(sp, 0);
+	hscxreport(sp, 1);
+}
+
+/*
+ * HSCX stuff goes here
+ */
+
+static void
+hscx_empty_fifo(struct HscxState *hsp, int count)
+{
+	byte *ptr;
+	struct IsdnCardState *sp = hsp->sp;
+	struct BufHeader *ibh = hsp->rcvibh;
+	long flags;
+
+	if ((sp->debug & L1_DEB_HSCX) && !(sp->debug & L1_DEB_HSCX_FIFO))
+		debugl1(sp, "hscx_empty_fifo");
+
+	if (hsp->rcvptr + count > BUFFER_SIZE(HSCX_RBUF_ORDER,
+					      HSCX_RBUF_BPPS)) {
+		if (sp->debug & L1_DEB_WARN)
+			debugl1(sp, "hscx_empty_fifo: incoming packet too large");
+		writehscxCMDR(sp->hscx[hsp->hscx], 0x80);
+		return;
+	}
+	ptr = DATAPTR(ibh);
+	ptr += hsp->rcvptr;
+
+	hsp->rcvptr += count;
+	save_flags(flags);
+	cli();
+	read_fifo(sp->hscx[hsp->hscx], ptr, count);
+	writehscxCMDR(sp->hscx[hsp->hscx], 0x80);
+	restore_flags(flags);
+	if (sp->debug & L1_DEB_HSCX_FIFO) {
+		char tmp[128];
+		char *t = tmp;
+
+		t += sprintf(t, "hscx_empty_fifo %c cnt %d",
+			     hsp->hscx ? 'B' : 'A', count);
+		QuickHex(t, ptr, count);
+		debugl1(sp, tmp);
+	}
+}
+
+static void
+hscx_fill_fifo(struct HscxState *hsp)
+{
+	struct IsdnCardState *sp = hsp->sp;
+	struct BufHeader *ibh;
+	int more, count;
+	byte *ptr;
+	long flags;
+
+	if ((sp->debug & L1_DEB_HSCX) && !(sp->debug & L1_DEB_HSCX_FIFO))
+		debugl1(sp, "hscx_fill_fifo");
+
+	ibh = hsp->xmtibh;
+	if (!ibh)
+		return;
+
+	count = ibh->datasize - hsp->sendptr;
+	if (count <= 0)
+		return;
+
+	more = (hsp->mode == 1) ? 1 : 0;
+	if (count > 32) {
+		more = !0;
+		count = 32;
+	}
+	ptr = DATAPTR(ibh);
+	ptr += hsp->sendptr;
+	hsp->sendptr += count;
+
+	waitforXFW(sp->hscx[hsp->hscx]);
+	save_flags(flags);
+	cli();
+	write_fifo(sp->hscx[hsp->hscx], ptr, count);
+	writehscxCMDR(sp->hscx[hsp->hscx], more ? 0x8 : 0xa);
+	restore_flags(flags);
+	if (sp->debug & L1_DEB_HSCX_FIFO) {
+		char tmp[128];
+		char *t = tmp;
+
+		t += sprintf(t, "hscx_fill_fifo %c cnt %d",
+			     hsp->hscx ? 'B' : 'A', count);
+		QuickHex(t, ptr, count);
+		debugl1(sp, tmp);
+	}
+}
+
+static inline void
+hscx_interrupt(struct IsdnCardState *sp, byte val, byte hscx)
+{
+	byte r;
+	struct HscxState *hsp = sp->hs + hscx;
+	int count, err;
+	char tmp[32];
+
+	if (!hsp->init)
+		return;
+
+	if (val & 0x80) {	/* RME */
+
+		r = readreg(sp->hscx[hsp->hscx], HSCX_RSTA);
+		if ((r & 0xf0) != 0xa0) {
+			if (!r & 0x80)
+				if (sp->debug & L1_DEB_WARN)
+					debugl1(sp, "HSCX invalid frame");
+			if ((r & 0x40) && hsp->mode)
+				if (sp->debug & L1_DEB_WARN) {
+					sprintf(tmp, "HSCX RDO mode=%d",
+						hsp->mode);
+					debugl1(sp, tmp);
+				}
+			if (!r & 0x20)
+				if (sp->debug & L1_DEB_WARN)
+					debugl1(sp, "HSCX CRC error");
+			if (hsp->rcvibh)
+				BufPoolRelease(hsp->rcvibh);
+			hsp->rcvibh = NULL;
+			writehscxCMDR(sp->hscx[hsp->hscx], 0x80);
+			goto afterRME;
+		}
+		if (!hsp->rcvibh)
+			if (BufPoolGet(&hsp->rcvibh, &hsp->rbufpool,
+				       GFP_ATOMIC, (void *) 1, 1)) {
+				if (sp->debug & L1_DEB_WARN)
+					debugl1(sp, "HSCX RME out of buffers");
+				writehscxCMDR(sp->hscx[hsp->hscx], 0x80);
+				goto afterRME;
+			} else
+				hsp->rcvptr = 0;
+
+		count = readreg(sp->hscx[hsp->hscx], HSCX_RBCL) & 0x1f;
+		if (count == 0)
+			count = 32;
+		hscx_empty_fifo(hsp, count);
+		hsp->rcvibh->datasize = hsp->rcvptr - 1;
+		BufQueueLink(&hsp->rq, hsp->rcvibh);
+		hsp->rcvibh = NULL;
+		hscx_sched_event(hsp, HSCX_RCVBUFREADY);
+	}
+      afterRME:
+	if (val & 0x40) {	/* RPF */
+		if (!hsp->rcvibh) {
+			if (hsp->mode == 1)
+				err = BufPoolGet(&hsp->rcvibh, &hsp->smallpool,
+					      GFP_ATOMIC, (void *) 1, 2);
+			else
+				err = BufPoolGet(&hsp->rcvibh, &hsp->rbufpool,
+					      GFP_ATOMIC, (void *) 1, 2);
+
+			if (err) {
+				if (sp->debug & L1_DEB_WARN)
+					debugl1(sp, "HSCX RPF out of buffers");
+				writehscxCMDR(sp->hscx[hsp->hscx], 0x80);
+				goto afterRPF;
+			} else
+				hsp->rcvptr = 0;
+		}
+		hscx_empty_fifo(hsp, 32);
+		if (hsp->mode == 1) {
+			/* receive audio data */
+			hsp->rcvibh->datasize = hsp->rcvptr;
+			BufQueueLink(&hsp->rq, hsp->rcvibh);
+			hsp->rcvibh = NULL;
+			hscx_sched_event(hsp, HSCX_RCVBUFREADY);
+		}
+	}
+      afterRPF:
+	if (val & 0x10) {	/* XPR */
+		if (hsp->xmtibh)
+			if (hsp->xmtibh->datasize > hsp->sendptr) {
+				hscx_fill_fifo(hsp);
+				goto afterXPR;
+			} else {
+				if (hsp->releasebuf)
+					BufPoolRelease(hsp->xmtibh);
+				hsp->sendptr = 0;
+				if (hsp->st->l4.l1writewakeup)
+					hsp->st->l4.l1writewakeup(hsp->st);
+				hsp->xmtibh = NULL;
+			}
+		if (!BufQueueUnlink(&hsp->xmtibh, &hsp->sq)) {
+			hsp->releasebuf = !0;
+			hscx_fill_fifo(hsp);
+		} else
+			hscx_sched_event(hsp, HSCX_XMTBUFREADY);
+	}
+      afterXPR:
+}
+
+/*
+ * ISAC stuff goes here
+ */
+
+static void
+isac_empty_fifo(struct IsdnCardState *sp, int count)
+{
+	byte *ptr;
+	struct BufHeader *ibh = sp->rcvibh;
+	long flags;
+
+	if ((sp->debug & L1_DEB_ISAC) && !(sp->debug & L1_DEB_ISAC_FIFO))
+		if (sp->debug & L1_DEB_ISAC)
+			debugl1(sp, "isac_empty_fifo");
+
+	if (sp->rcvptr >= 3072) {
+		if (sp->debug & L1_DEB_WARN) {
+			char tmp[40];
+			sprintf(tmp, "isac_empty_fifo rcvptr %d", sp->rcvptr);
+			debugl1(sp, tmp);
+		}
+		return;
+	}
+	ptr = DATAPTR(ibh);
+	ptr += sp->rcvptr;
+	sp->rcvptr += count;
+
+	save_flags(flags);
+	cli();
+	read_fifo(sp->isac, ptr, count);
+	writereg(sp->isac, ISAC_CMDR, 0x80);
+	restore_flags(flags);
+	if (sp->debug & L1_DEB_ISAC_FIFO) {
+		char tmp[128];
+		char *t = tmp;
+
+		t += sprintf(t, "isac_empty_fifo cnt %d", count);
+		QuickHex(t, ptr, count);
+		debugl1(sp, tmp);
+	}
+}
+
+static void
+isac_fill_fifo(struct IsdnCardState *sp)
+{
+	struct BufHeader *ibh;
+	int count, more;
+	byte *ptr;
+	long flags;
+
+	if ((sp->debug & L1_DEB_ISAC) && !(sp->debug & L1_DEB_ISAC_FIFO))
+		debugl1(sp, "isac_fill_fifo");
+
+	ibh = sp->xmtibh;
+	if (!ibh)
+		return;
+
+	count = ibh->datasize - sp->sendptr;
+	if (count <= 0)
+		return;
+	if (count >= 3072)
+		return;
+
+	more = 0;
+	if (count > 32) {
+		more = !0;
+		count = 32;
+	}
+	ptr = DATAPTR(ibh);
+	ptr += sp->sendptr;
+	sp->sendptr += count;
+
+	save_flags(flags);
+	cli();
+	write_fifo(sp->isac, ptr, count);
+	writereg(sp->isac, ISAC_CMDR, more ? 0x8 : 0xa);
+	restore_flags(flags);
+	if (sp->debug & L1_DEB_ISAC_FIFO) {
+		char tmp[128];
+		char *t = tmp;
+
+		t += sprintf(t, "isac_fill_fifo cnt %d", count);
+		QuickHex(t, ptr, count);
+		debugl1(sp, tmp);
+	}
+}
+
+static void
+ph_command(struct IsdnCardState *sp, unsigned int command)
+{
+	if (sp->debug & L1_DEB_ISAC) {
+		char tmp[32];
+		sprintf(tmp, "ph_command %d", command);
+		debugl1(sp, tmp);
+	}
+	writereg(sp->isac, ISAC_CIX0, (command << 2) | 3);
+}
+
+
+static inline void
+isac_interrupt(struct IsdnCardState *sp, byte val)
+{
+	byte exval;
+	unsigned int count;
+	char tmp[32];
+
+	if (sp->debug & L1_DEB_ISAC) {
+		sprintf(tmp, "ISAC interrupt %x", val);
+		debugl1(sp, tmp);
+	}
+	if (val & 0x80) {	/* RME */
+		exval = readreg(sp->isac, ISAC_RSTA);
+		if ((exval & 0x70) != 0x20) {
+			if (exval & 0x40)
+				if (sp->debug & L1_DEB_WARN)
+					debugl1(sp, "ISAC RDO");
+			if (!exval & 0x20)
+				if (sp->debug & L1_DEB_WARN)
+					debugl1(sp, "ISAC CRC error");
+			if (sp->rcvibh)
+				BufPoolRelease(sp->rcvibh);
+			sp->rcvibh = NULL;
+			writereg(sp->isac, ISAC_CMDR, 0x80);
+			goto afterRME;
+		}
+		if (!sp->rcvibh)
+			if (BufPoolGet(&(sp->rcvibh), &(sp->rbufpool),
+				       GFP_ATOMIC, (void *) 1, 3)) {
+				if (sp->debug & L1_DEB_WARN)
+					debugl1(sp, "ISAC RME out of buffers!");
+				writereg(sp->isac, ISAC_CMDR, 0x80);
+				goto afterRME;
+			} else
+				sp->rcvptr = 0;
+		count = readreg(sp->isac, ISAC_RBCL) & 0x1f;
+		if (count == 0)
+			count = 32;
+		isac_empty_fifo(sp, count);
+		sp->rcvibh->datasize = sp->rcvptr;
+		BufQueueLink(&(sp->rq), sp->rcvibh);
+		sp->rcvibh = NULL;
+		isac_sched_event(sp, ISAC_RCVBUFREADY);
+	}
+      afterRME:
+	if (val & 0x40) {	/* RPF */
+		if (!sp->rcvibh)
+			if (BufPoolGet(&(sp->rcvibh), &(sp->rbufpool),
+				       GFP_ATOMIC, (void *) 1, 4)) {
+				if (sp->debug & L1_DEB_WARN)
+					debugl1(sp, "ISAC RME out of buffers!");
+				writereg(sp->isac, ISAC_CMDR, 0x80);
+				goto afterRPF;
+			} else
+				sp->rcvptr = 0;
+		isac_empty_fifo(sp, 32);
+	}
+      afterRPF:
+	if (val & 0x20) {	/* RSC */
+		/* never */
+		if (sp->debug & L1_DEB_WARN)
+			debugl1(sp, "ISAC RSC interrupt");
+	}
+	if (val & 0x10) {	/* XPR */
+		if (sp->xmtibh)
+			if (sp->xmtibh->datasize > sp->sendptr) {
+				isac_fill_fifo(sp);
+				goto afterXPR;
+			} else {
+				if (sp->releasebuf)
+					BufPoolRelease(sp->xmtibh);
+				sp->xmtibh = NULL;
+				sp->sendptr = 0;
+			}
+		if (!BufQueueUnlink(&sp->xmtibh, &sp->sq)) {
+			sp->releasebuf = !0;
+			isac_fill_fifo(sp);
+		} else
+			isac_sched_event(sp, ISAC_XMTBUFREADY);
+	}
+      afterXPR:
+	if (val & 0x04) {	/* CISQ */
+		sp->ph_state = (readreg(sp->isac, ISAC_CIX0) >> 2)
+		    & 0xf;
+		if (sp->debug & L1_DEB_ISAC) {
+			sprintf(tmp, "l1state %d", sp->ph_state);
+			debugl1(sp, tmp);
+		}
+		isac_new_ph(sp);
+	}
+	if (val & 0x02) {	/* SIN */
+		/* never */
+		if (sp->debug & L1_DEB_WARN)
+			debugl1(sp, "ISAC SIN interrupt");
+	}
+	if (val & 0x01) {	/* EXI */
+		exval = readreg(sp->isac, ISAC_EXIR);
+		if (sp->debug & L1_DEB_WARN) {
+			sprintf(tmp, "ISAC EXIR %02x", exval);
+			debugl1(sp, tmp);
+		}
+	}
+}
+
+static inline void
+hscx_int_main(struct IsdnCardState *sp, byte val)
+{
+
+	byte exval;
+	struct HscxState *hsp;
+	char tmp[32];
+
+
+	if (val & 0x01) {
+		hsp = sp->hs + 1;
+		exval = readreg(sp->hscx[1], HSCX_EXIR);
+		if (exval == 0x40) {
+			if (hsp->mode == 1)
+				hscx_fill_fifo(hsp);
+			else {
+				/* Here we lost an TX interrupt, so
+				   * restart transmitting the whole frame.
+				 */
+				hsp->sendptr = 0;
+				writehscxCMDR(sp->hscx[hsp->hscx], 0x01);
+				if (sp->debug & L1_DEB_WARN) {
+					sprintf(tmp, "HSCX B EXIR %x Lost TX", exval);
+					debugl1(sp, tmp);
+				}
+			}
+		} else if (sp->debug & L1_DEB_HSCX) {
+			sprintf(tmp, "HSCX B EXIR %x", exval);
+			debugl1(sp, tmp);
+		}
+	}
+	if (val & 0xf8) {
+		if (sp->debug & L1_DEB_HSCX) {
+			sprintf(tmp, "HSCX B interrupt %x", val);
+			debugl1(sp, tmp);
+		}
+		hscx_interrupt(sp, val, 1);
+	}
+	if (val & 0x02) {
+		hsp = sp->hs;
+		exval = readreg(sp->hscx[0], HSCX_EXIR);
+		if (exval == 0x40) {
+			if (hsp->mode == 1)
+				hscx_fill_fifo(hsp);
+			else {
+				/* Here we lost an TX interrupt, so
+				   * restart transmitting the whole frame.
+				 */
+				hsp->sendptr = 0;
+				writehscxCMDR(sp->hscx[hsp->hscx], 0x01);
+				if (sp->debug & L1_DEB_WARN) {
+					sprintf(tmp, "HSCX A EXIR %x Lost TX", exval);
+					debugl1(sp, tmp);
+				}
+			}
+		} else if (sp->debug & L1_DEB_HSCX) {
+			sprintf(tmp, "HSCX A EXIR %x", exval);
+			debugl1(sp, tmp);
+		}
+	}
+	if (val & 0x04) {
+		exval = readreg(sp->hscx[0], HSCX_ISTA);
+		if (sp->debug & L1_DEB_HSCX) {
+			sprintf(tmp, "HSCX A interrupt %x", exval);
+			debugl1(sp, tmp);
+		}
+		hscx_interrupt(sp, exval, 0);
+	}
+}
+
+static void
+avm_a1_interrupt(int intno, void *dev_id, struct pt_regs *regs)
+{
+	struct IsdnCardState *sp;
+	byte val, sval, stat = 0;
+	char tmp[32];
+
+	sp = (struct IsdnCardState *) irq2dev_map[intno];
+
+	if (!sp) {
+		printk(KERN_WARNING "AVM A1: Spurious interrupt!\n");
+		return;
+	}
+	while (((sval = bytein(sp->cfg_reg)) & 0xf) != 0x7) {
+		if (!(sval & AVM_A1_STAT_TIMER)) {
+			byteout(sp->cfg_reg, 0x14);
+			byteout(sp->cfg_reg, 0x18);
+			sval = bytein(sp->cfg_reg);
+		} else if (sp->debug & L1_DEB_INTSTAT) {
+			sprintf(tmp, "avm IntStatus %x", sval);
+			debugl1(sp, tmp);
+		}
+		if (!(sval & AVM_A1_STAT_HSCX)) {
+			val = readreg(sp->hscx[1], HSCX_ISTA);
+			if (val) {
+				hscx_int_main(sp, val);
+				stat |= 1;
+			}
+		}
+		if (!(sval & AVM_A1_STAT_ISAC)) {
+			val = readreg(sp->isac, ISAC_ISTA);
+			if (val) {
+				isac_interrupt(sp, val);
+				stat |= 2;
+			}
+		}
+	}
+	if (stat & 1) {
+		writereg(sp->hscx[0], HSCX_MASK, 0xFF);
+		writereg(sp->hscx[1], HSCX_MASK, 0xFF);
+		writereg(sp->hscx[0], HSCX_MASK, 0x0);
+		writereg(sp->hscx[1], HSCX_MASK, 0x0);
+	}
+	if (stat & 2) {
+		writereg(sp->isac, ISAC_MASK, 0xFF);
+		writereg(sp->isac, ISAC_MASK, 0x0);
+	}
+}
+
+
+static void
+initisac(struct IsdnCardState *sp)
+{
+	unsigned int adr = sp->isac;
+
+	/* 16.3 IOM 2 Mode */
+	writereg(adr, ISAC_MASK, 0xff);
+	writereg(adr, ISAC_ADF2, 0x80);
+	writereg(adr, ISAC_SQXR, 0x2f);
+	writereg(adr, ISAC_SPCR, 0x0);
+	writereg(adr, ISAC_ADF1, 0x2);
+	writereg(adr, ISAC_STCR, 0x70);
+	writereg(adr, ISAC_MODE, 0xc9);
+	writereg(adr, ISAC_TIMR, 0x0);
+	writereg(adr, ISAC_ADF1, 0x0);
+	writereg(adr, ISAC_CMDR, 0x41);
+	writereg(adr, ISAC_CIX0, (1 << 2) | 3);
+	writereg(adr, ISAC_MASK, 0xff);
+	writereg(adr, ISAC_MASK, 0x0);
+}
+
+static void
+modehscx(struct HscxState *hs, int mode, int ichan)
+{
+	struct IsdnCardState *sp = hs->sp;
+	int hscx = hs->hscx;
+
+	if (sp->debug & L1_DEB_HSCX) {
+		char tmp[40];
+		sprintf(tmp, "hscx %c mode %d ichan %d",
+			'A' + hscx, mode, ichan);
+		debugl1(sp, tmp);
+	}
+	hs->mode = mode;
+	writereg(sp->hscx[hscx], HSCX_CCR1, 0x85);
+	writereg(sp->hscx[hscx], HSCX_XAD1, 0xFF);
+	writereg(sp->hscx[hscx], HSCX_XAD2, 0xFF);
+	writereg(sp->hscx[hscx], HSCX_RAH2, 0xFF);
+	writereg(sp->hscx[hscx], HSCX_XBCH, 0x0);
+	writereg(sp->hscx[hscx], HSCX_RLCR, 0x0);
+
+	switch (mode) {
+	case (0):
+		writereg(sp->hscx[hscx], HSCX_CCR2, 0x30);
+		writereg(sp->hscx[hscx], HSCX_TSAX, 0xff);
+		writereg(sp->hscx[hscx], HSCX_TSAR, 0xff);
+		writereg(sp->hscx[hscx], HSCX_XCCR, 7);
+		writereg(sp->hscx[hscx], HSCX_RCCR, 7);
+		writereg(sp->hscx[hscx], HSCX_MODE, 0x84);
+		break;
+	case (1):
+		if (ichan == 0) {
+			writereg(sp->hscx[hscx], HSCX_CCR2, 0x30);
+			writereg(sp->hscx[hscx], HSCX_TSAX, 0x2f);
+			writereg(sp->hscx[hscx], HSCX_TSAR, 0x2f);
+			writereg(sp->hscx[hscx], HSCX_XCCR, 7);
+			writereg(sp->hscx[hscx], HSCX_RCCR, 7);
+		} else {
+			writereg(sp->hscx[hscx], HSCX_CCR2, 0x30);
+			writereg(sp->hscx[hscx], HSCX_TSAX, 0x3);
+			writereg(sp->hscx[hscx], HSCX_TSAR, 0x3);
+			writereg(sp->hscx[hscx], HSCX_XCCR, 7);
+			writereg(sp->hscx[hscx], HSCX_RCCR, 7);
+		}
+		writereg(sp->hscx[hscx], HSCX_MODE, 0xe4);
+		writereg(sp->hscx[hscx], HSCX_CMDR, 0x41);
+		break;
+	case (2):
+		if (ichan == 0) {
+			writereg(sp->hscx[hscx], HSCX_CCR2, 0x30);
+			writereg(sp->hscx[hscx], HSCX_TSAX, 0x2f);
+			writereg(sp->hscx[hscx], HSCX_TSAR, 0x2f);
+			writereg(sp->hscx[hscx], HSCX_XCCR, 7);
+			writereg(sp->hscx[hscx], HSCX_RCCR, 7);
+		} else {
+			writereg(sp->hscx[hscx], HSCX_CCR2, 0x30);
+			writereg(sp->hscx[hscx], HSCX_TSAX, 0x3);
+			writereg(sp->hscx[hscx], HSCX_TSAR, 0x3);
+			writereg(sp->hscx[hscx], HSCX_XCCR, 7);
+			writereg(sp->hscx[hscx], HSCX_RCCR, 7);
+		}
+		writereg(sp->hscx[hscx], HSCX_MODE, 0x8c);
+		writereg(sp->hscx[hscx], HSCX_CMDR, 0x41);
+		break;
+	}
+	writereg(sp->hscx[hscx], HSCX_ISTA, 0x00);
+}
+
+inline static void
+release_ioregs(struct IsdnCard *card, int mask)
+{
+	release_region(card->sp->cfg_reg, 8);
+	if (mask & 1)
+		release_region(card->sp->isac, 32);
+	if (mask & 2)
+		release_region(card->sp->isac - 0x400, 1);
+	if (mask & 4)
+		release_region(card->sp->hscx[0], 32);
+	if (mask & 8)
+		release_region(card->sp->hscx[0] - 0x400, 1);
+	if (mask & 0x10)
+		release_region(card->sp->hscx[1], 32);
+	if (mask & 0x20)
+		release_region(card->sp->hscx[1] - 0x400, 1);
+}
+
+void
+release_io_avm_a1(struct IsdnCard *card)
+{
+	release_ioregs(card, 0x3f);
+}
+
+static void
+clear_pending_ints(struct IsdnCardState *sp)
+{
+	int val;
+	char tmp[64];
+
+	val = readreg(sp->hscx[1], HSCX_ISTA);
+	sprintf(tmp, "HSCX B ISTA %x", val);
+	debugl1(sp, tmp);
+	if (val & 0x01) {
+		val = readreg(sp->hscx[1], HSCX_EXIR);
+		sprintf(tmp, "HSCX B EXIR %x", val);
+		debugl1(sp, tmp);
+	} else if (val & 0x02) {
+		val = readreg(sp->hscx[0], HSCX_EXIR);
+		sprintf(tmp, "HSCX A EXIR %x", val);
+		debugl1(sp, tmp);
+	}
+	val = readreg(sp->hscx[0], HSCX_ISTA);
+	sprintf(tmp, "HSCX A ISTA %x", val);
+	debugl1(sp, tmp);
+	val = readreg(sp->hscx[1], HSCX_STAR);
+	sprintf(tmp, "HSCX B STAR %x", val);
+	debugl1(sp, tmp);
+	val = readreg(sp->hscx[0], HSCX_STAR);
+	sprintf(tmp, "HSCX A STAR %x", val);
+	debugl1(sp, tmp);
+	val = readreg(sp->isac, ISAC_STAR);
+	sprintf(tmp, "ISAC STAR %x", val);
+	debugl1(sp, tmp);
+	val = readreg(sp->isac, ISAC_MODE);
+	sprintf(tmp, "ISAC MODE %x", val);
+	debugl1(sp, tmp);
+	val = readreg(sp->isac, ISAC_ADF2);
+	sprintf(tmp, "ISAC ADF2 %x", val);
+	debugl1(sp, tmp);
+	val = readreg(sp->isac, ISAC_ISTA);
+	sprintf(tmp, "ISAC ISTA %x", val);
+	debugl1(sp, tmp);
+	if (val & 0x01) {
+		val = readreg(sp->isac, ISAC_EXIR);
+		sprintf(tmp, "ISAC EXIR %x", val);
+		debugl1(sp, tmp);
+	} else if (val & 0x04) {
+		val = readreg(sp->isac, ISAC_CIR0);
+		sprintf(tmp, "ISAC CIR0 %x", val);
+		debugl1(sp, tmp);
+	}
+	writereg(sp->isac, ISAC_MASK, 0);
+	writereg(sp->isac, ISAC_CMDR, 0x41);
+}
+
+int
+initavm_a1(struct IsdnCardState *sp)
+{
+	int ret;
+	char tmp[40];
+
+	sp->counter = kstat.interrupts[sp->irq];
+	sprintf(tmp, "IRQ %d count %d", sp->irq, sp->counter);
+	debugl1(sp, tmp);
+	clear_pending_ints(sp);
+	ret = get_irq(sp->cardnr, &avm_a1_interrupt);
+	if (ret) {
+		initisac(sp);
+		sp->modehscx(sp->hs, 0, 0);
+		sp->modehscx(sp->hs + 1, 0, 0);
+		sprintf(tmp, "IRQ %d count %d", sp->irq,
+			kstat.interrupts[sp->irq]);
+		debugl1(sp, tmp);
+		if (kstat.interrupts[sp->irq] == sp->counter) {
+			printk(KERN_WARNING
+			       "AVM A1: IRQ(%d) getting no interrupts during init\n",
+			       sp->irq);
+			irq2dev_map[sp->irq] = NULL;
+			free_irq(sp->irq, NULL);
+			return (0);
+		}
+	}
+	return (ret);
+}
+
+int
+setup_avm_a1(struct IsdnCard *card)
+{
+	byte val, verA, verB;
+	struct IsdnCardState *sp = card->sp;
+	long flags;
+	char tmp[64];
+
+	strcpy(tmp, avm_revision);
+	printk(KERN_NOTICE "HiSax: AVM driver Rev. %s\n", HiSax_getrev(tmp));
+	if (sp->typ != ISDN_CTYPE_A1)
+		return (0);
+
+	sp->cfg_reg = card->para[1] + 0x1800;
+	sp->isac = card->para[1] + 0x1400;
+	sp->hscx[0] = card->para[1] + 0x400;
+	sp->hscx[1] = card->para[1] + 0xc00;
+	sp->irq = card->para[0];
+	if (check_region((sp->cfg_reg), 8)) {
+		printk(KERN_WARNING
+		       "HiSax: %s config port %x-%x already in use\n",
+		       CardType[card->typ],
+		       sp->cfg_reg,
+		       sp->cfg_reg + 8);
+		return (0);
+	} else {
+		request_region(sp->cfg_reg, 8, "avm cfg");
+	}
+	if (check_region((sp->isac), 32)) {
+		printk(KERN_WARNING
+		       "HiSax: %s isac ports %x-%x already in use\n",
+		       CardType[sp->typ],
+		       sp->isac,
+		       sp->isac + 32);
+		release_ioregs(card, 0);
+		return (0);
+	} else {
+		request_region(sp->isac, 32, "HiSax isac");
+	}
+	if (check_region((sp->isac - 0x400), 1)) {
+		printk(KERN_WARNING
+		       "HiSax: %s isac fifo port %x already in use\n",
+		       CardType[sp->typ],
+		       sp->isac - 0x400);
+		release_ioregs(card, 1);
+		return (0);
+	} else {
+		request_region(sp->isac - 0x400, 1, "HiSax isac fifo");
+	}
+	if (check_region((sp->hscx[0]), 32)) {
+		printk(KERN_WARNING
+		       "HiSax: %s hscx A ports %x-%x already in use\n",
+		       CardType[sp->typ],
+		       sp->hscx[0],
+		       sp->hscx[0] + 32);
+		release_ioregs(card, 3);
+		return (0);
+	} else {
+		request_region(sp->hscx[0], 32, "HiSax hscx A");
+	}
+	if (check_region((sp->hscx[0] - 0x400), 1)) {
+		printk(KERN_WARNING
+		       "HiSax: %s hscx A fifo port %x already in use\n",
+		       CardType[sp->typ],
+		       sp->hscx[0] - 0x400);
+		release_ioregs(card, 7);
+		return (0);
+	} else {
+		request_region(sp->hscx[0] - 0x400, 1, "HiSax hscx A fifo");
+	}
+	if (check_region((sp->hscx[1]), 32)) {
+		printk(KERN_WARNING
+		       "HiSax: %s hscx B ports %x-%x already in use\n",
+		       CardType[sp->typ],
+		       sp->hscx[1],
+		       sp->hscx[1] + 32);
+		release_ioregs(card, 0xf);
+		return (0);
+	} else {
+		request_region(sp->hscx[1], 32, "HiSax hscx B");
+	}
+	if (check_region((sp->hscx[1] - 0x400), 1)) {
+		printk(KERN_WARNING
+		       "HiSax: %s hscx B fifo port %x already in use\n",
+		       CardType[sp->typ],
+		       sp->hscx[1] - 0x400);
+		release_ioregs(card, 0x1f);
+		return (0);
+	} else {
+		request_region(sp->hscx[1] - 0x400, 1, "HiSax hscx B fifo");
+	}
+	save_flags(flags);
+	byteout(sp->cfg_reg, 0x0);
+	sti();
+	HZDELAY(HZ / 5 + 1);
+	byteout(sp->cfg_reg, 0x1);
+	HZDELAY(HZ / 5 + 1);
+	byteout(sp->cfg_reg, 0x0);
+	HZDELAY(HZ / 5 + 1);
+	val = sp->irq;
+	if (val == 9)
+		val = 2;
+	byteout(sp->cfg_reg + 1, val);
+	HZDELAY(HZ / 5 + 1);
+	byteout(sp->cfg_reg, 0x0);
+	HZDELAY(HZ / 5 + 1);
+	restore_flags(flags);
+
+	val = bytein(sp->cfg_reg);
+	printk(KERN_INFO "AVM A1: Byte at %x is %x\n",
+	       sp->cfg_reg, val);
+	val = bytein(sp->cfg_reg + 3);
+	printk(KERN_INFO "AVM A1: Byte at %x is %x\n",
+	       sp->cfg_reg + 3, val);
+	val = bytein(sp->cfg_reg + 2);
+	printk(KERN_INFO "AVM A1: Byte at %x is %x\n",
+	       sp->cfg_reg + 2, val);
+	byteout(sp->cfg_reg, 0x14);
+	byteout(sp->cfg_reg, 0x18);
+	val = bytein(sp->cfg_reg);
+	printk(KERN_INFO "AVM A1: Byte at %x is %x\n",
+	       sp->cfg_reg, val);
+
+	printk(KERN_NOTICE
+	       "HiSax: %s config irq:%d cfg:%x\n",
+	       CardType[sp->typ], sp->irq,
+	       sp->cfg_reg);
+	printk(KERN_NOTICE
+	       "HiSax: isac:%x/%x\n",
+	       sp->isac, sp->isac - 0x400);
+	printk(KERN_NOTICE
+	       "HiSax: hscx A:%x/%x  hscx B:%x/%x\n",
+	       sp->hscx[0], sp->hscx[0] - 0x400,
+	       sp->hscx[1], sp->hscx[1] - 0x400);
+	verA = readreg(sp->hscx[0], HSCX_VSTR) & 0xf;
+	verB = readreg(sp->hscx[1], HSCX_VSTR) & 0xf;
+	printk(KERN_INFO "AVM A1: HSCX version A: %s  B: %s\n",
+	       HscxVersion(verA), HscxVersion(verB));
+	val = readreg(sp->isac, ISAC_RBCH);
+	printk(KERN_INFO "AVM A1: ISAC %s\n",
+	       ISACVersion(val));
+	if ((verA == 0) | (verA == 0xf) | (verB == 0) | (verB == 0xf)) {
+		printk(KERN_WARNING
+		       "AVM A1: wrong HSCX versions check IO address\n");
+		release_io_avm_a1(card);
+		return (0);
+	}
+	sp->modehscx = &modehscx;
+	sp->ph_command = &ph_command;
+	sp->hscx_fill_fifo = &hscx_fill_fifo;
+	sp->isac_fill_fifo = &isac_fill_fifo;
+	return (1);
+}