main/dahdi-linux-vanilla: new aport (replacing dahdi-linux-hardened)

15 files changed, 3953 insertions, 0 deletions

diff --git a/main/dahdi-linux-vanilla/APKBUILD b/main/dahdi-linux-vanilla/APKBUILD
new file mode 100644
index 0000000000..04d6242978
--- /dev/null
+++ b/main/dahdi-linux-vanilla/APKBUILD
@@ -0,0 +1,108 @@
+# Contributor: Timo Teras <timo.teras@iki.fi>
+# Maintainer: Timo Teras <timo.teras@iki.fi>
+
+_flavor=vanilla
+_kpkg=linux-$_flavor
+_kver=4.14.16
+_kpkgrel=0
+_mypkgrel=0
+
+_kpkgver="$_kver-r$_kpkgrel"
+_abi_release=${_kver}-${_kpkgrel}-${_flavor}
+_realname=dahdi-linux
+
+pkgname=${_realname}-${_flavor}
+pkgver=$_kver
+# when chaning _dahdiver we *must* bump _mypkgrel
+_dahdiver=2.11.1
+pkgrel=$(( $_kpkgrel + $_mypkgrel ))
+pkgdesc="Digium Asterisk Hardware Device Interface drivers $_dahdiver"
+url="http://www.asterisk.org"
+arch="x86 x86_64"
+license="GPL"
+depends="dahdi-linux linux-${_flavor}=${_kpkgver}"
+# we need wget and tar because make install downloads firmware and uses fancy
+# options for tar and wget.
+makedepends="linux-${_flavor}-dev=${_kpkgver} wget tar perl"
+install=
+subpackages="$pkgname-dev"
+provides="${_realname}-grsec=${pkgver}-r${pkgrel}"
+source="http://downloads.digium.com/pub/telephony/dahdi-linux/releases/${_realname}-$_dahdiver.tar.gz
+	dahdi-depmod.patch
+	dahdi-bri_dchan.patch
+	dahdi-zaphfc.patch
+	zaphfc-dahdi-flortz.diff
+	zaphfc-dahdi-2.4.0.patch
+	zaphfc-dahdi-2.5.0.patch
+	zaphfc-dahdi-2.6.0.patch
+	zaphfc-dahdi-2.7.0.patch
+	linux-3.13.patch
+	linux-4.4.patch
+	linux-4.11.patch
+	linux-4.13.patch
+	"
+
+prepare() {
+	cd "$srcdir/$_realname-$_dahdiver"
+	# verify the kernel version
+	(
+
+	if [ -f "$startdir"/../linux-${_flavor}/APKBUILD ]; then
+		. "$startdir"/../linux-${_flavor}/APKBUILD
+		if [ "$_kver" != "$pkgver" ]; then
+			die "dahdi-linux-grsec: please update _kver to $pkgver"
+		fi
+		if [ "$_kpkgrel" != "$pkgrel" ]; then
+			die "dahdi-linux-grsec: please update _kpkgrel to $pkgrel"
+		fi
+	fi
+	) || return 1
+
+	for i in $source; do
+		case $i in
+		*.patch|*.diff)
+			msg "Applying $i"
+			patch -p1 -i "$srcdir"/$i || return 1
+			;;
+		esac
+	done
+}
+
+build() {
+	cd "$srcdir/$_realname-$_dahdiver"
+	make KVERS="${_abi_release}" DYNFS="yes" MODULES_EXTRA="zaphfc" \
+		|| return 1
+}
+
+package() {
+	cd "$srcdir/$_realname-$_dahdiver"
+	make KVERS="${_abi_release}" DYNFS="yes" MODULES_EXTRA="zaphfc" \
+		DESTDIR="$pkgdir" install-modules || return 1
+	rm -rf "$pkgdir"/lib/firmware "$pkgdir"/usr/lib/hotplug/firmware \
+		"$pkgdir"/usr/include
+}
+
+# since we sourced the APKBUILD above we got the dev() function there to
+# so we override it again.
+depends_dev="dahdi-linux-dev"
+dev() {
+	default_dev
+	local dir="$subpkgdir"/usr/src/dahdi-headers-${_abi_release}
+	install -D "$srcdir"/$_realname-$_dahdiver/drivers/dahdi/Module.symvers \
+		"$dir"/drivers/dahdi/Module.symvers
+	ln -s /usr/include "$dir"/include
+}
+
+sha512sums="db15d9237f157b5349de8f4cdb45573ed42e1dd25c83f900835c7e15637a19e1e95c7c990dc786c1e3f37f32419f3d009e179d27b5d16421789ff9bc76f54224  dahdi-linux-2.11.1.tar.gz
+aba01eb90d9db1c595ff22078c76aadb20900486b5794d38b7ee61fa30d2fb51be318a4d059246017640447aee03fb09bb5514c818e3caa1cd98e331ec065173  dahdi-depmod.patch
+fa2fa9e96eefc0f31a1a4a8f8f44e77936f6da0d7b74fe3c3d1f0de085621744ae4367932ac97a10b7f96b7d0954843b0bfe07a251b85434079cc6da29e243ba  dahdi-bri_dchan.patch
+8ef31c9723237da83954832df5aee1f5daa23f8fefe07a1a191a2c5da2c2308001d68cee83500f7ef43166bfc0d65552b0ca5362789c5c82a7217e09362fd5fe  dahdi-zaphfc.patch
+f18043fd18a05be7e49daa9d8c96c8a8c45936b14e82e30523e4d88b1620a73147f765d24d2038c4ec0855901e36e8e2b188d596f94437dfb80f6d76ab699d9d  zaphfc-dahdi-flortz.diff
+8068fcbba81b819bbd14a1a324457d0febd5350d16c6443be035c50f7759010376bd92d3c7ea69b47309e02603e587387b643f64663652e162853515371a6da5  zaphfc-dahdi-2.4.0.patch
+95811d56f5567bbab1e6fac89fdc7a4d78252a54a416e884903ae2709f8922f5cd02c492de0bad5c35fdfd52250ec231ed11457e36ba33f8747c3226491882de  zaphfc-dahdi-2.5.0.patch
+7533c640817f71789c922bb9a5a3b6132b5b47958770929b1c9a50a1e2e6de914e278f466a85ef99759e291e5907c56d60926c74075f4e731a9910a46c1be3ea  zaphfc-dahdi-2.6.0.patch
+daca74da31c655265164a854987d45ca5ee3af1defbe2d49a9f1a70a48a43dc2bc3ceba724781ae29e3a9078b827f641d2e29809fb25101986f2f69c767d1382  zaphfc-dahdi-2.7.0.patch
+dfc2b0357dc3d2a37c45f1fcc503009cf35e99c8b174d0dd7c91ac4c2c9bb3428f9a19a3f264446069fd751441833f43e11b3b55a060865c6daca9bef74008be  linux-3.13.patch
+18cc299c9b9ab05b93769c0aa68595d3b3b640b97c6ee546b9cbe551f08679557c7e2a5a8255577ab6ae7036c2210550b45066b03d04ebbe7adad1a59aba5866  linux-4.4.patch
+1ce44a927607e04013f03af7655687098397b68c0e857beb5b4d6ae09e92cac59974fd69b5be6bf6d2e4d8e5643f2ce54d9e05661da656d943b5f30c4696ef41  linux-4.11.patch
+ded7386794abad54fb9f7106e4dc0cc62da1a6b32baaed35a15820f935fe65128e9639bf27eaca392fec0750fd0ee13dbb0cbbf95b8d749085d491361a2b3da2  linux-4.13.patch"
diff --git a/main/dahdi-linux-vanilla/constify.patch b/main/dahdi-linux-vanilla/constify.patch
new file mode 100644
index 0000000000..6741522f23
--- /dev/null
+++ b/main/dahdi-linux-vanilla/constify.patch
@@ -0,0 +1,22 @@
+--- ./drivers/dahdi/voicebus/voicebus.h.orig
++++ ./drivers/dahdi/voicebus/voicebus.h
+@@ -89,7 +89,7 @@
+ 	void (*handle_receive)(struct voicebus *vb, struct list_head *buffers);
+ 	void (*handle_transmit)(struct voicebus *vb, struct list_head *buffers);
+ 	void (*handle_error)(struct voicebus *vb);
+-};
++} __no_const;
+ 
+ /**
+  * struct voicebus_descriptor_list - A single descriptor list.
+--- ./drivers/dahdi/wctc4xxp/base.c.orig
++++ ./drivers/dahdi/wctc4xxp/base.c
+@@ -3193,7 +3193,7 @@
+ 	return ret;
+ }
+ 
+-static void wctc4xxp_setup_file_operations(struct file_operations *fops)
++static void wctc4xxp_setup_file_operations(file_operations_no_const *fops)
+ {
+ 	fops->owner = THIS_MODULE;
+ 	fops->read =  wctc4xxp_read;
diff --git a/main/dahdi-linux-vanilla/dahdi-2.5.0-bri-fixes.patch b/main/dahdi-linux-vanilla/dahdi-2.5.0-bri-fixes.patch
new file mode 100644
index 0000000000..01dcf646fb
--- /dev/null
+++ b/main/dahdi-linux-vanilla/dahdi-2.5.0-bri-fixes.patch
@@ -0,0 +1,327 @@
+Index: dahdi-linux-2.5.0/drivers/dahdi/xpp/card_bri.c
+===================================================================
+--- dahdi-linux-2.5.0.orig/drivers/dahdi/xpp/card_bri.c	2011-08-15 14:42:29.000000000 +0300
++++ dahdi-linux-2.5.0/drivers/dahdi/xpp/card_bri.c	2011-08-15 14:51:37.000000000 +0300
+@@ -274,7 +274,6 @@
+ 	int	frame_begin;
+ 
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(transmit) {
+ 		direction = "TX";
+ 		frame_begin = priv->txframe_begin;
+@@ -312,9 +311,7 @@
+ {
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(priv->dchan_alive == up)
+ 		return;
+ 	if(up) {
+@@ -332,9 +329,7 @@
+ {
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(priv->layer1_up == up)
+ 		return;
+ 	priv->layer1_up = up;
+@@ -348,9 +343,7 @@
+ 	struct BRI_priv_data	*priv;
+ 	byte			curr_state;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	curr_state = priv->state_register.bits.v_su_sta;
+ 	XPD_DBG(SIGNAL, xpd, "%s\n", (on)?"ON":"OFF");
+ 	if(on) {
+@@ -391,9 +384,7 @@
+ 	struct BRI_priv_data	*priv;
+ 	byte			curr_state;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	curr_state = priv->state_register.bits.v_su_sta;
+ 	XPD_DBG(SIGNAL, xpd, "%s\n", (on)?"ON":"OFF");
+ 	if(on) {
+@@ -443,7 +434,6 @@
+ 	struct BRI_priv_data	*priv;
+ 
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ #ifdef	CONFIG_DAHDI_BRI_DCHANS
+ 	if(debug & DBG_COMMANDS)
+ 		dump_hex_buf(xpd, "D-Chan(abort) RX: dchan_rbuf",
+@@ -460,7 +450,6 @@
+ 	byte			status;
+ 
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ #ifdef	CONFIG_DAHDI_BRI_DCHANS
+ 	if(priv->dchan_r_idx < 4) {
+ 		XPD_NOTICE(xpd, "D-Chan RX short frame (dchan_r_idx=%d)\n",
+@@ -503,7 +492,6 @@
+ 	int			idx;
+ 
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	dchan_buf = dchan->readchunk;
+ 	idx = priv->dchan_r_idx;
+ 	if(idx + len >= DCHAN_BUFSIZE) {
+@@ -527,7 +515,6 @@
+ 	struct BRI_priv_data	*priv;
+ 
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ #ifdef	CONFIG_DAHDI_BRI_DCHANS
+ 	dchan->bytes2receive = priv->dchan_r_idx - 1;
+ 	dchan->eofrx = 1;
+@@ -556,10 +543,7 @@
+ 		return 0;
+ 	if(!SPAN_REGISTERED(xpd)) /* Nowhere to copy data */
+ 		return 0;
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+-	xbus = xpd->xbus;
+ 	dchan = XPD_CHAN(xpd, 2);
+ 	if(!IS_OFFHOOK(xpd, 2)) {	/* D-chan is used? */
+ 		static int rate_limit;
+@@ -629,9 +613,7 @@
+ 		return 0;
+ 	if(!SPAN_REGISTERED(xpd)) /* Nowhere to copy data */
+ 		return 0;
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	dchan = XPD_CHAN(xpd, 2);
+ 	if(!IS_OFFHOOK(xpd, 2)) {	/* D-chan is used? */
+ 		static int rate_limit;
+@@ -677,7 +659,6 @@
+ 	struct BRI_priv_data	*priv;
+ 
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	dchan = XPD_CHAN(xpd, 2);
+ 	if (dchan == chan) {
+ 		atomic_inc(&priv->hdlc_pending);
+@@ -716,7 +697,6 @@
+ 	int			ret;
+ 
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ #ifndef	CONFIG_DAHDI_BRI_DCHANS
+ 	if(atomic_read(&priv->hdlc_pending) == 0)
+ 		return 0;
+@@ -769,7 +749,6 @@
+ {
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+ 	XPD_DBG(PROC, xpd, "\n");
+ #ifdef	CONFIG_PROC_FS
+@@ -784,7 +763,6 @@
+ {
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+ 	XPD_DBG(PROC, xpd, "\n");
+ #ifdef	CONFIG_PROC_FS
+@@ -828,7 +806,6 @@
+ {
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+ 	XPD_DBG(GENERAL, xpd, "\n");
+ 	priv = xpd->priv;
+ 	DO_LED(xpd, GREEN_LED, BRI_LED_OFF);
+@@ -841,7 +818,6 @@
+ 
+ static int BRI_card_remove(xbus_t *xbus, xpd_t *xpd)
+ {
+-	BUG_ON(!xpd);
+ 	XPD_DBG(GENERAL, xpd, "\n");
+ 	bri_proc_remove(xbus, xpd);
+ 	return 0;
+@@ -877,10 +853,8 @@
+ 	struct BRI_priv_data	*priv;
+ 	int			i;
+ 	
+-	BUG_ON(!xpd);
+ 	xbus = xpd->xbus;
+ 	priv = xpd->priv;
+-	BUG_ON(!xbus);
+ 	XPD_DBG(GENERAL, xpd, "%s\n", (on)?"on":"off");
+ 	if(!on) {
+ 		/* Nothing to do yet */
+@@ -927,11 +901,6 @@
+ 
+ static int BRI_card_dahdi_postregistration(xpd_t *xpd, bool on)
+ {
+-	xbus_t			*xbus;
+-	
+-	BUG_ON(!xpd);
+-	xbus = xpd->xbus;
+-	BUG_ON(!xbus);
+ 	XPD_DBG(GENERAL, xpd, "%s\n", (on)?"on":"off");
+ 	return(0);
+ }
+@@ -956,7 +925,6 @@
+ 	int			other_led;
+ 	int			mod;
+ 
+-	BUG_ON(!xpd);
+ 	if(IS_NT(xpd)) {
+ 		which_led = RED_LED;
+ 		other_led = GREEN_LED;
+@@ -965,7 +933,6 @@
+ 		other_led = RED_LED;
+ 	}
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	timer_count = xpd->timer_count;
+ 	if(xpd->blink_mode) {
+ 		if((timer_count % DEFAULT_LED_PERIOD) == 0) {
+@@ -1014,9 +981,7 @@
+ {
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(IS_NT(xpd)) {
+ 		if (priv->t1 > HFC_TIMER_OFF) {
+ 			if (--priv->t1 == 0) {
+@@ -1053,9 +1018,7 @@
+ {
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(!priv->initialized || !xbus->self_ticking)
+ 		return 0;
+ 	if(poll_interval != 0 && (priv->tick_counter % poll_interval) == 0) {
+@@ -1111,7 +1074,6 @@
+ 
+ static int BRI_card_ioctl(xpd_t *xpd, int pos, unsigned int cmd, unsigned long arg)
+ {
+-	BUG_ON(!xpd);
+ 	if(!XBUS_IS(xpd->xbus, READY))
+ 		return -ENODEV;
+ 	switch (cmd) {
+@@ -1131,7 +1093,6 @@
+ 
+ static int BRI_card_open(xpd_t *xpd, lineno_t pos)
+ {
+-	BUG_ON(!xpd);
+ 	if(pos == 2) {
+ 		LINE_DBG(SIGNAL, xpd, pos, "OFFHOOK the whole span\n");
+ 		BIT_SET(PHONEDEV(xpd).offhook_state, 0);
+@@ -1230,12 +1191,8 @@
+ {
+ 	struct phonedev	*phonedev = container_of(span, struct phonedev, span);
+ 	xpd_t		*xpd = container_of(phonedev, struct xpd, phonedev);
+-	struct BRI_priv_data	*priv;
+ 	struct dahdi_chan	*dchan;
+ 
+-	BUG_ON(!xpd);
+-	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(!XBUS_IS(xpd->xbus, READY)) {
+ 		XPD_DBG(GENERAL, xpd, "Startup called by dahdi. No Hardware. Ignored\n");
+ 		return -ENODEV;
+@@ -1267,11 +1224,7 @@
+ {
+ 	struct phonedev	*phonedev = container_of(span, struct phonedev, span);
+ 	xpd_t		*xpd = container_of(phonedev, struct xpd, phonedev);
+-	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+-	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(!XBUS_IS(xpd->xbus, READY)) {
+ 		XPD_DBG(GENERAL, xpd, "Shutdown called by dahdi. No Hardware. Ignored\n");
+ 		return -ENODEV;
+@@ -1292,7 +1245,6 @@
+ 	xpd_t		*main_xpd;
+ 	unsigned long	flags;
+ 
+-	BUG_ON(!xpd);
+ 	main_xpd = xpd_byaddr(xpd->xbus, xpd->addr.unit, 0);
+ 	if(!main_xpd) {
+ 		XPD_DBG(DEVICES, xpd, "Unit 0 is already gone. Ignore request\n");
+@@ -1350,8 +1302,6 @@
+ 	xpp_line_t	wanted_lines;
+ 
+ 
+-	BUG_ON(!xpd);
+-	BUG_ON(!pack);
+ 	pcm = RPACKET_FIELD(pack, GLOBAL, PCM_WRITE, pcm);
+ 	for(subunit = 0; subunit < MAX_SUBUNIT; subunit++) {
+ 		xpd_t		*tmp_xpd;
+@@ -1435,12 +1385,8 @@
+ 
+ static int BRI_echocancel_setmask(xpd_t *xpd, xpp_line_t ec_mask)
+ {
+-	struct BRI_priv_data	*priv;
+ 	int i;
+ 
+-	BUG_ON(!xpd);
+-	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	XPD_DBG(GENERAL, xpd, "0x%8X\n", ec_mask);
+ 	if (!ECHOOPS(xpd->xbus)) {
+ 		XPD_DBG(GENERAL, xpd,
+@@ -1466,9 +1412,7 @@
+ 	struct bri_leds		*bri_leds;
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xbus);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	XPD_DBG(LEDS, xpd, "%s -> %d\n",
+ 		(which_led)?"RED":"GREEN",
+ 		to_led_state);
+@@ -1507,9 +1451,7 @@
+ 	struct BRI_priv_data	*priv;
+ 	su_rd_sta_t		new_state;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(!priv->initialized) {
+ 		XPD_ERR(xpd, "%s called on uninitialized AB\n", __FUNCTION__);
+ 		return;
+@@ -1621,7 +1563,6 @@
+ 	}
+ 	spin_lock_irqsave(&xpd->lock, flags);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	if(REG_FIELD(info, do_subreg)) {
+ 		XPD_DBG(REGS, xpd, "RI %02X %02X %02X\n",
+ 				REG_FIELD(info, regnum), REG_FIELD(info, subreg), REG_FIELD(info, data_low));
+@@ -1665,7 +1606,6 @@
+ {
+ 	struct BRI_priv_data	*priv;
+ 
+-	BUG_ON(!xpd);
+ 	priv = xpd->priv;
+ 	XPD_DBG(GENERAL, xpd, "%s\n", (on)?"ON":"OFF");
+ 	if(on) {
+@@ -1745,7 +1685,6 @@
+ 		return -ENODEV;
+ 	spin_lock_irqsave(&xpd->lock, flags);
+ 	priv = xpd->priv;
+-	BUG_ON(!priv);
+ 	len += sprintf(page + len, "%05d Layer 1: ", priv->poll_counter);
+ 	if(priv->reg30_good) {
+ 		len += sprintf(page + len, "%-5s ", (priv->layer1_up) ? "UP" : "DOWN");
diff --git a/main/dahdi-linux-vanilla/dahdi-bri_dchan.patch b/main/dahdi-linux-vanilla/dahdi-bri_dchan.patch
new file mode 100644
index 0000000000..8d2ba97fd1
--- /dev/null
+++ b/main/dahdi-linux-vanilla/dahdi-bri_dchan.patch
@@ -0,0 +1,167 @@
+# Translate the D channels to a standard channel data.
+# The HFC chipset provides us the D channel as data, but
+# Zaptel expects it as a standard channel with 1000 samples
+# per second.
+
+Index: dahdi-linux-2.5.0/include/dahdi/kernel.h
+===================================================================
+--- dahdi-linux-2.5.0.orig/include/dahdi/kernel.h	2011-06-29 18:32:40.000000000 +0300
++++ dahdi-linux-2.5.0/include/dahdi/kernel.h	2011-08-15 14:14:26.000000000 +0300
+@@ -413,6 +413,13 @@
+ 	int statcount;
+ 	int lastnumbufs;
+ #endif
++#ifdef CONFIG_DAHDI_BRI_DCHANS
++	int bytes2receive;
++	int maxbytes2transmit; /* size of the tx buffer in the card driver */
++	int bytes2transmit;
++	int eofrx;
++	int eoftx;
++#endif
+ 	spinlock_t lock;
+ 	char name[40];
+ 	/* Specified by DAHDI */
+@@ -723,6 +730,9 @@
+ 	DAHDI_FLAGBIT_TXUNDERRUN = 22,	/*!< Transmit underrun condition */
+ 	DAHDI_FLAGBIT_RXOVERRUN = 23,	/*!< Receive overrun condition */
+ 	DAHDI_FLAGBIT_DEVFILE	= 25,	/*!< Channel has a sysfs dev file */
++#if defined(CONFIG_DAHDI_BRI_DCHANS)
++	DAHDI_FLAGBIT_BRIDCHAN   = 26,	/*!< hardhdlc-like handling of the D channel */
++#endif
+ };
+ 
+ #ifdef CONFIG_DAHDI_NET
+@@ -789,6 +799,7 @@
+ #define DAHDI_FLAG_BUFEVENTS	DAHDI_FLAG(BUFEVENTS)
+ #define DAHDI_FLAG_TXUNDERRUN	DAHDI_FLAG(TXUNDERRUN)
+ #define DAHDI_FLAG_RXOVERRUN	DAHDI_FLAG(RXOVERRUN)
++#define DAHDI_FLAG_BRIDCHAN	DAHDI_FLAG(BRIDCHAN)
+ 
+ struct file;
+ 
+Index: dahdi-linux-2.5.0/include/dahdi/dahdi_config.h
+===================================================================
+--- dahdi-linux-2.5.0.orig/include/dahdi/dahdi_config.h	2011-01-05 17:52:03.000000000 +0200
++++ dahdi-linux-2.5.0/include/dahdi/dahdi_config.h	2011-08-15 14:13:01.000000000 +0300
+@@ -195,4 +195,10 @@
+  */
+ /* #define CONFIG_DAHDI_MIRROR */
+ 
++/*
++ * Uncomment the following for BRI D channels
++ *
++ */
++#define CONFIG_DAHDI_BRI_DCHANS
++
+ #endif
+Index: dahdi-linux-2.5.0/drivers/dahdi/dahdi-base.c
+===================================================================
+--- dahdi-linux-2.5.0.orig/drivers/dahdi/dahdi-base.c	2011-07-21 19:26:31.000000000 +0300
++++ dahdi-linux-2.5.0/drivers/dahdi/dahdi-base.c	2011-08-15 14:13:01.000000000 +0300
+@@ -7224,11 +7224,40 @@
+ 					*(txb++) = fasthdlc_tx_run_nocheck(&ms->txhdlc);
+ 				}
+ 				bytes -= left;
++#ifdef CONFIG_DAHDI_BRI_DCHANS
++			} else if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) {
++			    /*
++			     * Let's get this right, we want to transmit complete frames only.
++			     * The card driver will do the dirty HDLC work for us.
++			     * txb (transmit buffer) is supposed to be big enough to store one frame
++			     * we will make this as big as the D fifo (1KB or 2KB)
++			     */
++
++			    /* there are 'left' bytes in the user buffer left to transmit */
++			    left = ms->writen[ms->outwritebuf] - ms->writeidx[ms->outwritebuf] - 2;
++			    if (left > ms->maxbytes2transmit) {
++				memcpy(txb, buf + ms->writeidx[ms->outwritebuf], ms->maxbytes2transmit);
++				ms->writeidx[ms->outwritebuf] += ms->maxbytes2transmit;
++				txb += ms->maxbytes2transmit;
++				ms->bytes2transmit = ms->maxbytes2transmit;
++				ms->eoftx = 0;
++			    } else {
++				memcpy(txb, buf + ms->writeidx[ms->outwritebuf], left);
++				ms->writeidx[ms->outwritebuf] += left + 2;
++				txb += left + 2;
++				ms->bytes2transmit = left;
++				ms->eoftx = 1;
++			    }
++			    bytes = 0;
++#endif
+ 			} else {
+ 				memcpy(txb, buf + ms->writeidx[ms->outwritebuf], left);
+ 				ms->writeidx[ms->outwritebuf]+=left;
+ 				txb += left;
+ 				bytes -= left;
++#if defined(CONFIG_DAHDI_BRI_DCHANS)	
++				ms->bytes2transmit=DAHDI_CHUNKSIZE;
++#endif
+ 			}
+ 			/* Check buffer status */
+ 			if (ms->writeidx[ms->outwritebuf] >= ms->writen[ms->outwritebuf]) {
+@@ -7285,6 +7314,17 @@
+ 				/* Transmit a flag if this is an HDLC channel */
+ 				if (ms->flags & DAHDI_FLAG_HDLC)
+ 					fasthdlc_tx_frame_nocheck(&ms->txhdlc);
++#if defined(CONFIG_DAHDI_BRI_DCHANS)	
++				if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) {
++			//	    if (ms->bytes2transmit > 0) {
++					// txb += 2;
++					// ms->bytes2transmit -= 2;
++					bytes=0;
++					ms->eoftx = 1;
++//					printk(KERN_CRIT "zaptel EOF(%d) bytes2transmit %d\n",ms->eoftx,ms->bytes2transmit);
++			//	    }
++				}
++#endif
+ #ifdef CONFIG_DAHDI_NET
+ 				if (dahdi_have_netdev(ms))
+ 					netif_wake_queue(chan_to_netdev(ms));
+@@ -7346,6 +7386,12 @@
+ 			}
+ 			needtxunderrun += bytes;
+ 			bytes = 0;
++#if defined(CONFIG_DAHDI_BRI_DCHANS)	
++		} else if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) {
++		    ms->bytes2transmit = 0;
++		    ms->eoftx = 0;
++		    bytes = 0;
++#endif
+ 		} else {
+ 			memset(txb, DAHDI_LIN2X(0, ms), bytes);	/* Lastly we use silence on telephony channels */
+ 			needtxunderrun += bytes;
+@@ -8267,6 +8313,14 @@
+ 	int res;
+ 	int left, x;
+ 
++#if defined(CONFIG_DAHDI_BRI_DCHANS)	
++	if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) {
++	    bytes = ms->bytes2receive;
++	    if (bytes < 1) return;
++//	    printk(KERN_CRIT "bytes2receive %d\n",ms->bytes2receive);
++	}
++#endif
++
+ 	while(bytes) {
+ #if defined(CONFIG_DAHDI_NET)  || defined(CONFIG_DAHDI_PPP)
+ 		skb = NULL;
+@@ -8324,6 +8378,19 @@
+ 						}
+ 					}
+ 				}
++#ifdef CONFIG_DAHDI_BRI_DCHANS
++			} else if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) {
++			    memcpy(buf + ms->readidx[ms->inreadbuf], rxb, left);
++			    rxb += left;
++			    ms->readidx[ms->inreadbuf] += left;
++			    bytes -= left;
++			    if (ms->eofrx == 1) {
++				eof=1;
++			    }
++//			    printk(KERN_CRIT "receiving %d bytes\n",ms->bytes2receive);
++			    ms->bytes2receive = 0;
++			    ms->eofrx = 0;
++#endif
+ 			} else {
+ 				/* Not HDLC */
+ 				memcpy(buf + ms->readidx[ms->inreadbuf], rxb, left);
diff --git a/main/dahdi-linux-vanilla/dahdi-depmod.patch b/main/dahdi-linux-vanilla/dahdi-depmod.patch
new file mode 100644
index 0000000000..289aad403b
--- /dev/null
+++ b/main/dahdi-linux-vanilla/dahdi-depmod.patch
@@ -0,0 +1,22 @@
+Index: dahdi-linux-2.0.0-rc4/Makefile
+===================================================================
+--- dahdi-linux-2.0.0-rc4.orig/Makefile	2008-09-09 14:07:23.000000000 +0300
++++ dahdi-linux-2.0.0-rc4/Makefile	2008-09-09 14:12:31.000000000 +0300
+@@ -190,7 +190,7 @@
+ 	build_tools/uninstall-modules dahdi $(KVERS)
+ endif
+ 	$(KMAKE) INSTALL_MOD_PATH=$(DESTDIR) INSTALL_MOD_DIR=dahdi modules_install
+-	[ `id -u` = 0 ] && /sbin/depmod -a $(KVERS) || :
++	[ -z "$(DESTDIR)" -a `id -u` = 0 ] && /sbin/depmod -a $(KVERS) || :
+ 
+ uninstall-modules:
+ ifdef DESTDIR
+@@ -203,7 +203,7 @@
+ 		rm -rf /lib/modules/$(KVERS)/dahdi; \
+ 		echo "done."; \
+ 	fi
+-	[ `id -u` = 0 ] && /sbin/depmod -a $(KVERS) || :
++	[ -z "$(DESTDIR)" -a `id -u` = 0 ] && /sbin/depmod -a $(KVERS) || :
+ endif
+ 
+ update:
diff --git a/main/dahdi-linux-vanilla/dahdi-zaphfc.patch b/main/dahdi-linux-vanilla/dahdi-zaphfc.patch
new file mode 100644
index 0000000000..931c5b5cf6
--- /dev/null
+++ b/main/dahdi-linux-vanilla/dahdi-zaphfc.patch
@@ -0,0 +1,1429 @@
+Index: dahdi-linux-2.1.0/drivers/dahdi/zaphfc.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ dahdi-linux-2.1.0/drivers/dahdi/zaphfc.c	2008-12-10 12:46:14.000000000 +0200
+@@ -0,0 +1,1129 @@
++/*
++ * zaphfc.c - Zaptel driver for HFC-S PCI A based ISDN BRI cards
++ *
++ * kernel module inspired by HFC PCI ISDN4Linux and Zaptel drivers
++ *
++ * Copyright (C) 2002, 2003, 2004, 2005 Junghanns.NET GmbH
++ *
++ * Klaus-Peter Junghanns <kpj@junghanns.net>
++ *
++ * This program is free software and may be modified and
++ * distributed under the terms of the GNU Public License.
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#ifdef RTAITIMING
++#include <asm/io.h>
++#include <rtai.h>
++#include <rtai_sched.h>
++#include <rtai_fifos.h>
++#endif
++#include <linux/pci.h>
++#include <linux/init.h>
++#include <linux/interrupt.h>
++#include <linux/delay.h>
++#include <dahdi/kernel.h>
++#include "zaphfc.h"
++
++#include <linux/moduleparam.h>
++
++#if CONFIG_PCI
++
++#define CLKDEL_TE	0x0f	/* CLKDEL in TE mode */
++#define CLKDEL_NT	0x6c	/* CLKDEL in NT mode */
++
++typedef struct {
++        int vendor_id;
++        int device_id;
++        char *vendor_name;
++        char *card_name;
++} PCI_ENTRY;
++
++static const PCI_ENTRY id_list[] =
++{
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_2BD0, "CCD/Billion/Asuscom", "2BD0"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B000, "Billion", "B000"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B006, "Billion", "B006"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B007, "Billion", "B007"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B008, "Billion", "B008"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B009, "Billion", "B009"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B00A, "Billion", "B00A"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B00B, "Billion", "B00B"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B00C, "Billion", "B00C"},
++        {PCI_VENDOR_ID_CCD, PCI_DEVICE_ID_CCD_B100, "Seyeon", "B100"},
++        {PCI_VENDOR_ID_ABOCOM, PCI_DEVICE_ID_ABOCOM_2BD1, "Abocom/Magitek", "2BD1"},
++        {PCI_VENDOR_ID_ASUSTEK, PCI_DEVICE_ID_ASUSTEK_0675, "Asuscom/Askey", "675"},
++        {PCI_VENDOR_ID_BERKOM, PCI_DEVICE_ID_BERKOM_T_CONCEPT, "German telekom", "T-Concept"},
++        {PCI_VENDOR_ID_BERKOM, PCI_DEVICE_ID_BERKOM_A1T, "German telekom", "A1T"},
++        {PCI_VENDOR_ID_ANIGMA, PCI_DEVICE_ID_ANIGMA_MC145575, "Motorola MC145575", "MC145575"},
++        {PCI_VENDOR_ID_ZOLTRIX, PCI_DEVICE_ID_ZOLTRIX_2BD0, "Zoltrix", "2BD0"},
++        {PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_DF_M_IOM2_E,"Digi International", "Digi DataFire Micro V IOM2 (Europe)"},
++        {PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_DF_M_E,"Digi International", "Digi DataFire Micro V (Europe)"},
++        {PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_DF_M_IOM2_A,"Digi International", "Digi DataFire Micro V IOM2 (North America)"},
++        {PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_DF_M_A,"Digi International", "Digi DataFire Micro V (North America)"},
++	{0x182d, 0x3069,"Sitecom","Isdn 128 PCI"},
++        {0, 0, NULL, NULL},
++};
++
++static struct hfc_card *hfc_dev_list = NULL;
++static int hfc_dev_count = 0;
++static int modes = 0; // all TE
++static int debug = 0;
++static struct pci_dev *multi_hfc = NULL;
++static DEFINE_SPINLOCK(registerlock);
++
++void hfc_shutdownCard(struct hfc_card *hfctmp) {
++    unsigned long flags;
++
++    if (hfctmp == NULL) {
++	return;
++    }
++
++    if (hfctmp->pci_io == NULL) {
++	return;
++    }
++    
++    spin_lock_irqsave(&hfctmp->lock,flags);
++
++    printk(KERN_INFO "zaphfc: shutting down card at %p.\n",hfctmp->pci_io);
++
++    /* Clear interrupt mask */
++    hfctmp->regs.int_m2 = 0;
++    hfc_outb(hfctmp, hfc_INT_M2, hfctmp->regs.int_m2);
++
++    /* Reset pending interrupts */
++    hfc_inb(hfctmp, hfc_INT_S1);
++
++    /* Wait for interrupts that might still be pending */
++    spin_unlock_irqrestore(&hfctmp->lock, flags);
++    set_current_state(TASK_UNINTERRUPTIBLE);
++    schedule_timeout((30 * HZ) / 1000);	// wait 30 ms
++    spin_lock_irqsave(&hfctmp->lock,flags);
++
++    /* Remove interrupt handler */
++    if (hfctmp->irq) {
++	free_irq(hfctmp->irq, hfctmp);
++    }
++
++    /* Soft-reset the card */
++    hfc_outb(hfctmp, hfc_CIRM, hfc_CIRM_RESET); // softreset on
++
++    spin_unlock_irqrestore(&hfctmp->lock, flags);
++    set_current_state(TASK_UNINTERRUPTIBLE);
++    schedule_timeout((30 * HZ) / 1000);	// wait 30 ms
++    spin_lock_irqsave(&hfctmp->lock,flags);
++
++    hfc_outb(hfctmp,hfc_CIRM,0);	// softreset off
++
++    pci_write_config_word(hfctmp->pcidev, PCI_COMMAND, 0);	// disable memio and bustmaster
++
++    if (hfctmp->fifomem != NULL) {
++        kfree(hfctmp->fifomem);
++    }
++    iounmap((void *) hfctmp->pci_io);
++    hfctmp->pci_io = NULL;
++    if (hfctmp->pcidev != NULL) {
++        pci_disable_device(hfctmp->pcidev);
++    }
++    spin_unlock_irqrestore(&hfctmp->lock,flags);
++    if (hfctmp->ztdev != NULL) {
++	dahdi_unregister(&hfctmp->ztdev->span);
++	kfree(hfctmp->ztdev);
++	printk(KERN_INFO "unregistered from DAHDI.\n");
++    }
++}
++
++void hfc_resetCard(struct hfc_card *hfctmp) {
++    unsigned long flags;
++
++    spin_lock_irqsave(&hfctmp->lock,flags);
++    pci_write_config_word(hfctmp->pcidev, PCI_COMMAND, PCI_COMMAND_MEMORY);	// enable memio
++    hfctmp->regs.int_m2 = 0;
++    hfc_outb(hfctmp, hfc_INT_M2, hfctmp->regs.int_m2);
++
++//    printk(KERN_INFO "zaphfc: resetting card.\n");
++    pci_set_master(hfctmp->pcidev);
++    hfc_outb(hfctmp, hfc_CIRM, hfc_CIRM_RESET);	// softreset on
++    spin_unlock_irqrestore(&hfctmp->lock, flags);
++
++    set_current_state(TASK_UNINTERRUPTIBLE);
++    schedule_timeout((30 * HZ) / 1000);	// wait 30 ms
++    hfc_outb(hfctmp, hfc_CIRM, 0);	// softreset off
++
++    set_current_state(TASK_UNINTERRUPTIBLE);
++    schedule_timeout((20 * HZ) / 1000);	// wait 20 ms
++    if (hfc_inb(hfctmp,hfc_STATUS) & hfc_STATUS_PCI_PROC) {
++	printk(KERN_WARNING "zaphfc: hfc busy.\n");
++    }
++
++//    hfctmp->regs.fifo_en = hfc_FIFOEN_D | hfc_FIFOEN_B1 | hfc_FIFOEN_B2;
++//    hfctmp->regs.fifo_en = hfc_FIFOEN_D;	/* only D fifos enabled */
++    hfctmp->regs.fifo_en = 0;	/* no fifos enabled */
++    hfc_outb(hfctmp, hfc_FIFO_EN, hfctmp->regs.fifo_en);
++
++    hfctmp->regs.trm = 2;
++    hfc_outb(hfctmp, hfc_TRM, hfctmp->regs.trm);
++
++    if (hfctmp->regs.nt_mode == 1) {
++	hfc_outb(hfctmp, hfc_CLKDEL, CLKDEL_NT); /* ST-Bit delay for NT-Mode */
++    } else {
++	hfc_outb(hfctmp, hfc_CLKDEL, CLKDEL_TE); /* ST-Bit delay for TE-Mode */
++    }
++    hfctmp->regs.sctrl_e = hfc_SCTRL_E_AUTO_AWAKE;
++    hfc_outb(hfctmp, hfc_SCTRL_E, hfctmp->regs.sctrl_e);	/* S/T Auto awake */
++    hfctmp->regs.bswapped = 0;	/* no exchange */
++
++    hfctmp->regs.ctmt = hfc_CTMT_TRANSB1 | hfc_CTMT_TRANSB2; // all bchans are transparent , no freaking hdlc
++    hfc_outb(hfctmp, hfc_CTMT, hfctmp->regs.ctmt);
++
++    hfctmp->regs.int_m1 = 0;
++    hfc_outb(hfctmp, hfc_INT_M1, hfctmp->regs.int_m1);
++
++#ifdef RTAITIMING
++    hfctmp->regs.int_m2 = 0;
++#else
++    hfctmp->regs.int_m2 = hfc_M2_PROC_TRANS;
++#endif
++    hfc_outb(hfctmp, hfc_INT_M2, hfctmp->regs.int_m2);
++
++    /* Clear already pending ints */
++    hfc_inb(hfctmp, hfc_INT_S1);
++
++    if (hfctmp->regs.nt_mode == 1) {
++	hfctmp->regs.sctrl = 3 | hfc_SCTRL_NONE_CAP | hfc_SCTRL_MODE_NT;	/* set tx_lo mode, error in datasheet ! */
++    } else {
++	hfctmp->regs.sctrl = 3 | hfc_SCTRL_NONE_CAP | hfc_SCTRL_MODE_TE;	/* set tx_lo mode, error in datasheet ! */
++    }
++
++    hfctmp->regs.mst_mode = hfc_MST_MODE_MASTER;	/* HFC Master Mode */
++    hfc_outb(hfctmp, hfc_MST_MODE, hfctmp->regs.mst_mode);
++
++    hfc_outb(hfctmp, hfc_SCTRL, hfctmp->regs.sctrl);
++    hfctmp->regs.sctrl_r = 3;
++    hfc_outb(hfctmp, hfc_SCTRL_R, hfctmp->regs.sctrl_r);
++
++    hfctmp->regs.connect = 0;
++    hfc_outb(hfctmp, hfc_CONNECT, hfctmp->regs.connect);
++
++    hfc_outb(hfctmp, hfc_CIRM, 0x80 | 0x40);	// bit order
++
++    /* Finally enable IRQ output */
++#ifndef RTAITIMING
++    hfctmp->regs.int_m2 |= hfc_M2_IRQ_ENABLE;
++    hfc_outb(hfctmp, hfc_INT_M2, hfctmp->regs.int_m2);
++#endif
++
++    /* clear pending ints */
++    hfc_inb(hfctmp, hfc_INT_S1); 
++    hfc_inb(hfctmp, hfc_INT_S2);
++}
++
++void hfc_registerCard(struct hfc_card *hfccard) {
++    spin_lock(&registerlock);
++    if (hfccard != NULL) {
++	hfccard->cardno = hfc_dev_count++;
++	hfccard->next = hfc_dev_list;
++	hfc_dev_list = hfccard;
++    }
++    spin_unlock(&registerlock);
++}
++
++static void hfc_btrans(struct hfc_card *hfctmp, char whichB) {
++    // we are called with irqs disabled from the irq handler
++    int count, maxlen, total;
++    unsigned char *f1, *f2;
++    unsigned short *z1, *z2, newz1;
++    int freebytes;
++
++    if (whichB == 1) {
++	f1 = (char *)(hfctmp->fifos + hfc_FIFO_B1TX_F1);
++        f2 = (char *)(hfctmp->fifos + hfc_FIFO_B1TX_F2);
++	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1TX_Z1 + (*f1 * 4));
++	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1TX_Z2 + (*f1 * 4));
++    } else {
++	f1 = (char *)(hfctmp->fifos + hfc_FIFO_B2TX_F1);
++        f2 = (char *)(hfctmp->fifos + hfc_FIFO_B2TX_F2);
++	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2TX_Z1 + (*f1 * 4));
++	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2TX_Z2 + (*f1 * 4));
++    }
++
++    freebytes = *z2 - *z1;
++    if (freebytes <= 0) {
++	freebytes += hfc_B_FIFO_SIZE;
++    }
++    count = DAHDI_CHUNKSIZE;
++
++    total = count;
++    if (freebytes < count) {
++	hfctmp->clicks++;
++	/* only spit out this warning once per second to not make things worse! */
++	if (hfctmp->clicks > 100) {
++	    printk(KERN_CRIT "zaphfc: bchan tx fifo full, dropping audio! (z1=%d, z2=%d)\n",*z1,*z2);
++	    hfctmp->clicks = 0;
++	}
++	return;
++    }
++    
++    maxlen = (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL) - *z1;
++    if (maxlen > count) {
++        maxlen = count;
++    }
++    newz1 = *z1 + total;
++    if (newz1 >= (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL)) { newz1 -= hfc_B_FIFO_SIZE; }
++
++	if (whichB == 1) {
++	    memcpy((char *)(hfctmp->fifos + hfc_FIFO_B1TX_ZOFF + *z1),hfctmp->ztdev->chans[0].writechunk, maxlen);
++	} else {
++	    memcpy((char *)(hfctmp->fifos + hfc_FIFO_B2TX_ZOFF + *z1),hfctmp->ztdev->chans[1].writechunk, maxlen);
++	}
++	
++	count -= maxlen;
++	if (count > 0) {
++	// Buffer wrap
++	    if (whichB == 1) {
++	        memcpy((char *)(hfctmp->fifos + hfc_FIFO_B1TX_ZOFF + hfc_B_SUB_VAL),hfctmp->ztdev->chans[0].writechunk+maxlen, count);
++	    } else {
++	        memcpy((char *)(hfctmp->fifos + hfc_FIFO_B2TX_ZOFF + hfc_B_SUB_VAL),hfctmp->ztdev->chans[1].writechunk+maxlen, count);
++	    }
++	}
++
++    *z1 = newz1;	/* send it now */
++
++//    if (count > 0) printk(KERN_CRIT "zaphfc: bchan tx fifo (f1=%d, f2=%d, z1=%d, z2=%d)\n",(*f1) & hfc_FMASK,(*f2) & hfc_FMASK, *z1, *z2);
++    return;    
++}
++
++static void hfc_brec(struct hfc_card *hfctmp, char whichB) {
++    // we are called with irqs disabled from the irq handler
++    int count, maxlen, drop;
++    volatile unsigned char *f1, *f2;
++    volatile unsigned short *z1, *z2, newz2;
++    int bytes = 0;
++
++    if (whichB == 1) {
++	f1 = (char *)(hfctmp->fifos + hfc_FIFO_B1RX_F1);
++        f2 = (char *)(hfctmp->fifos + hfc_FIFO_B1RX_F2);
++	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1RX_Z1 + (*f1 * 4));
++	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1RX_Z2 + (*f1 * 4));
++    } else {
++	f1 = (char *)(hfctmp->fifos + hfc_FIFO_B2RX_F1);
++        f2 = (char *)(hfctmp->fifos + hfc_FIFO_B2RX_F2);
++	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2RX_Z1 + (*f1 * 4));
++	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2RX_Z2 + (*f1 * 4));
++    }
++
++    bytes = *z1 - *z2;
++    if (bytes < 0) {
++	bytes += hfc_B_FIFO_SIZE;
++    }
++    count = DAHDI_CHUNKSIZE;
++    
++    if (bytes < DAHDI_CHUNKSIZE) {
++#ifndef RTAITIMING
++	printk(KERN_CRIT "zaphfc: bchan rx fifo not enough bytes to receive! (z1=%d, z2=%d, wanted %d got %d), probably a buffer overrun.\n",*z1,*z2,DAHDI_CHUNKSIZE,bytes);
++#endif
++	return;
++    }
++
++    /* allowing the buffering of hfc_BCHAN_BUFFER bytes of audio data works around irq jitter */
++    if (bytes > hfc_BCHAN_BUFFER + DAHDI_CHUNKSIZE) {
++	/* if the system is too slow to handle it, we will have to drop it all (except 1 DAHDI chunk) */
++	drop = bytes - DAHDI_CHUNKSIZE;
++	hfctmp->clicks++;
++	/* only spit out this warning once per second to not make things worse! */
++	if (hfctmp->clicks > 100) {
++	    printk(KERN_CRIT "zaphfc: dropped audio (z1=%d, z2=%d, wanted %d got %d, dropped %d).\n",*z1,*z2,count,bytes,drop);
++	    hfctmp->clicks = 0;
++	}
++	/* hm, we are processing the b chan data tooooo slowly... let's drop the lost audio */
++	newz2 = *z2 + drop;
++	if (newz2 >= (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL)) { 
++	    newz2 -= hfc_B_FIFO_SIZE; 
++	}
++	*z2 = newz2;
++    }
++
++    
++    maxlen = (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL) - *z2;
++    if (maxlen > count) {
++        maxlen = count;
++    }
++    if (whichB == 1) {
++        memcpy(hfctmp->ztdev->chans[0].readchunk,(char *)(hfctmp->fifos + hfc_FIFO_B1RX_ZOFF + *z2), maxlen);
++    } else {
++        memcpy(hfctmp->ztdev->chans[1].readchunk,(char *)(hfctmp->fifos + hfc_FIFO_B2RX_ZOFF + *z2), maxlen);
++    }
++    newz2 = *z2 + count;
++    if (newz2 >= (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL)) { 
++        newz2 -= hfc_B_FIFO_SIZE; 
++    }
++    *z2 = newz2;
++	
++    count -= maxlen;
++    if (count > 0) {
++    // Buffer wrap
++        if (whichB == 1) {
++	    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1RX_Z2 + (*f1 * 4));
++    	    memcpy(hfctmp->ztdev->chans[0].readchunk + maxlen,(char *)(hfctmp->fifos + hfc_FIFO_B1RX_ZOFF + hfc_B_SUB_VAL), count);
++	} else {
++	    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2RX_Z2 + (*f1 * 4));
++	    memcpy(hfctmp->ztdev->chans[1].readchunk + maxlen,(char *)(hfctmp->fifos + hfc_FIFO_B2RX_ZOFF + hfc_B_SUB_VAL), count);
++	}
++	newz2 = *z2 + count;
++	if (newz2 >= (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL)) { 
++	    newz2 -= hfc_B_FIFO_SIZE; 
++	}
++    }
++
++
++    if (whichB == 1) {
++	dahdi_ec_chunk(&hfctmp->ztdev->chans[0], hfctmp->ztdev->chans[0].readchunk, hfctmp->ztdev->chans[0].writechunk);
++    } else {
++	dahdi_ec_chunk(&hfctmp->ztdev->chans[1], hfctmp->ztdev->chans[1].readchunk, hfctmp->ztdev->chans[1].writechunk);
++    }
++    return;    
++}
++
++
++static void hfc_dtrans(struct hfc_card *hfctmp) {
++    // we are called with irqs disabled from the irq handler
++    int x;
++    int count, maxlen, total;
++    unsigned char *f1, *f2, newf1;
++    unsigned short *z1, *z2, newz1;
++    int frames, freebytes;
++
++    if (hfctmp->ztdev->chans[2].bytes2transmit == 0) {
++	return;
++    }
++
++    f1 = (char *)(hfctmp->fifos + hfc_FIFO_DTX_F1);
++    f2 = (char *)(hfctmp->fifos + hfc_FIFO_DTX_F2);
++    z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DTX_Z1 + (*f1 * 4));
++    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DTX_Z2 + (*f1 * 4));
++
++    frames = (*f1 - *f2) & hfc_FMASK;
++    if (frames < 0) {
++	frames += hfc_MAX_DFRAMES + 1;
++    }
++
++    if (frames >= hfc_MAX_DFRAMES) {
++	printk(KERN_CRIT "zaphfc: dchan tx fifo total number of frames exceeded!\n");
++	return;
++    }
++
++    freebytes = *z2 - *z1;
++    if (freebytes <= 0) {
++	freebytes += hfc_D_FIFO_SIZE;
++    }
++    count = hfctmp->ztdev->chans[2].bytes2transmit;
++
++    total = count;
++    if (freebytes < count) {
++	printk(KERN_CRIT "zaphfc: dchan tx fifo not enough free bytes! (z1=%d, z2=%d)\n",*z1,*z2);
++	return;
++    }
++    
++    newz1 = (*z1 + count) & hfc_ZMASK;
++    newf1 = ((*f1 + 1) & hfc_MAX_DFRAMES) | (hfc_MAX_DFRAMES + 1);	// next frame
++    
++    if (count > 0) {
++	if (debug) {
++    	    printk(KERN_CRIT "zaphfc: card %d TX [ ", hfctmp->cardno);
++	    for (x=0; x<count; x++) {
++		printk("%#2x ",hfctmp->dtransbuf[x]);
++	    }
++	    if (hfctmp->ztdev->chans[2].eoftx == 1) {
++		printk("] %d bytes\n", count);
++	    } else {
++		printk("..] %d bytes\n", count);
++	    }
++	}
++	maxlen = hfc_D_FIFO_SIZE - *z1;
++	if (maxlen > count) {
++	    maxlen = count;
++	}
++	memcpy((char *)(hfctmp->fifos + hfc_FIFO_DTX_ZOFF + *z1),hfctmp->ztdev->chans[2].writechunk, maxlen);
++	count -= maxlen;
++	if (count > 0) {
++	    memcpy((char *)(hfctmp->fifos + hfc_FIFO_DTX_ZOFF),(char *)(hfctmp->ztdev->chans[2].writechunk + maxlen), count);
++	}
++    }
++
++    *z1 = newz1;
++
++    if (hfctmp->ztdev->chans[2].eoftx == 1) {
++	*f1 = newf1;
++	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DTX_Z1 + (*f1 * 4));
++	*z1 = newz1;
++	hfctmp->ztdev->chans[2].eoftx = 0;
++    }
++//    printk(KERN_CRIT "zaphfc: dchan tx fifo (f1=%d, f2=%d, z1=%d, z2=%d)\n",(*f1) & hfc_FMASK,(*f2) & hfc_FMASK, *z1, *z2);
++    return;    
++}
++
++/* receive a complete hdlc frame, skip broken or short frames */
++static void hfc_drec(struct hfc_card *hfctmp) {
++    int count=0, maxlen=0, framelen=0;
++    unsigned char *f1, *f2, *crcstat;
++    unsigned short *z1, *z2, oldz2, newz2;
++
++    hfctmp->ztdev->chans[2].bytes2receive=0;
++    hfctmp->ztdev->chans[2].eofrx = 0;
++
++    /* put the received data into the DAHDI buffer
++       we'll call dahdi_receive() later when the timer fires. */
++    f1 = (char *)(hfctmp->fifos + hfc_FIFO_DRX_F1);
++    f2 = (char *)(hfctmp->fifos + hfc_FIFO_DRX_F2);
++
++    if (*f1 == *f2) return; /* nothing received, strange eh? */
++
++    z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DRX_Z1 + (*f2 * 4));
++    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DRX_Z2 + (*f2 * 4));
++    
++    /* calculate length of frame, including 2 bytes CRC and 1 byte STAT */
++    count = *z1 - *z2;
++    
++    if (count < 0) { 
++	count += hfc_D_FIFO_SIZE; /* ring buffer wrapped */
++    }
++    count++;
++    framelen = count;
++
++    crcstat = (char *)(hfctmp->fifos + hfc_FIFO_DRX_ZOFF + *z1);
++
++    if ((framelen < 4) || (*crcstat != 0x0)) {
++	/* the frame is too short for a valid HDLC frame or the CRC is borked */
++	printk(KERN_CRIT "zaphfc: empty HDLC frame or bad CRC received (framelen = %d, stat = %#x, card = %d).\n", framelen, *crcstat, hfctmp->cardno);
++	oldz2 = *z2;
++	*f2 = ((*f2 + 1) & hfc_MAX_DFRAMES) | (hfc_MAX_DFRAMES + 1);	/* NEXT!!! */
++        // recalculate z2, because Z2 is a function of F2 Z2(F2) and we INCed F2!!!
++	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DRX_Z2 + (*f2 * 4));
++	*z2 = (oldz2 + framelen) & hfc_ZMASK;
++	hfctmp->drecinframe = 0;
++	hfctmp->regs.int_drec--;
++	/* skip short or broken frames */
++        hfctmp->ztdev->chans[2].bytes2receive = 0; 
++	return;
++    }
++
++    count -= 1;	/* strip STAT */
++    hfctmp->ztdev->chans[2].eofrx = 1;
++
++    if (count + *z2 <= hfc_D_FIFO_SIZE) {
++	maxlen = count;
++    } else {
++	maxlen = hfc_D_FIFO_SIZE - *z2;
++    }
++
++    /* copy first part */
++    memcpy(hfctmp->drecbuf, (char *)(hfctmp->fifos + hfc_FIFO_DRX_ZOFF + *z2), maxlen);
++    hfctmp->ztdev->chans[2].bytes2receive += maxlen; 
++    
++    count -= maxlen;
++    if (count > 0) {
++	/* ring buffer wrapped, copy rest from start of d fifo */
++	memcpy(hfctmp->drecbuf + maxlen, (char *)(hfctmp->fifos + hfc_FIFO_DRX_ZOFF), count);
++	hfctmp->ztdev->chans[2].bytes2receive += count; 
++    }
++
++    /* frame read */
++    oldz2 = *z2;
++    newz2 = (oldz2 + framelen) & hfc_ZMASK;
++    *f2 = ((*f2 + 1) & hfc_MAX_DFRAMES) | (hfc_MAX_DFRAMES + 1);	/* NEXT!!! */
++    /* recalculate z2, because Z2 is a function of F2 Z2(F2) and we INCed F2!!! */
++    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DRX_Z2 + (*f2 * 4));
++    *z2 = newz2;
++    hfctmp->drecinframe = 0;
++    hfctmp->regs.int_drec--; 
++}
++
++#ifndef RTAITIMING
++DAHDI_IRQ_HANDLER(hfc_interrupt) {
++    struct hfc_card *hfctmp = dev_id;
++    unsigned long flags = 0;
++    unsigned char stat;
++#else
++static void hfc_service(struct hfc_card *hfctmp) {
++#endif
++    struct dahdi_hfc *zthfc;
++    unsigned char s1, s2, l1state;
++    int x;
++
++    if (!hfctmp) {
++#ifndef RTAITIMING
++		return IRQ_NONE;
++#else
++	/* rtai */
++	return;
++#endif
++    }
++
++    if (!hfctmp->pci_io) {
++	    printk(KERN_WARNING "%s: IO-mem disabled, cannot handle interrupt\n",
++		   __FUNCTION__);
++#ifndef RTAITIMING
++	    return IRQ_NONE;
++#else
++	/* rtai */
++	return;
++#endif
++    }
++    
++    /*	we assume a few things in this irq handler:
++	- the hfc-pci will only generate "timer" irqs (proc/non-proc)
++	- we need to use every 8th IRQ (to generate 1khz timing)
++	OR
++	- if we use rtai for timing the hfc-pci will not generate ANY irq,
++	  instead rtai will call this "fake" irq with a 1khz realtime timer. :)
++	- rtai will directly service the card, not like it used to by triggering
++	  the linux irq
++    */
++
++#ifndef RTAITIMING
++    spin_lock_irqsave(&hfctmp->lock, flags);
++    stat = hfc_inb(hfctmp, hfc_STATUS);
++
++    if ((stat & hfc_STATUS_ANYINT) == 0) {
++        // maybe we are sharing the irq
++	spin_unlock_irqrestore(&hfctmp->lock,flags);
++	return IRQ_NONE;
++    }
++#endif
++
++    s1 = hfc_inb(hfctmp, hfc_INT_S1);
++    s2 = hfc_inb(hfctmp, hfc_INT_S2); 
++    if (s1 != 0) {
++	if (s1 & hfc_INTS_TIMER) {
++	    // timer (bit 7)
++	    // printk(KERN_CRIT "timer %d %d %d.\n", stat, s1, s2);
++	}
++	if (s1 & hfc_INTS_L1STATE) {
++	    // state machine (bit 6)
++	    // printk(KERN_CRIT "zaphfc: layer 1 state machine interrupt\n");
++	    zthfc = hfctmp->ztdev;
++	    l1state = hfc_inb(hfctmp,hfc_STATES)  & hfc_STATES_STATE_MASK;
++	    if (hfctmp->regs.nt_mode == 1) {
++		if (debug) {
++	    	    printk(KERN_CRIT "zaphfc: card %d layer 1 state = G%d\n", hfctmp->cardno, l1state);
++		}
++		switch (l1state) {
++		    case 3:
++#ifdef RTAITIMING
++			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] layer 1 ACTIVATED (G%d) [realtime]", hfctmp->cardno, l1state);
++#else
++			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] layer 1 ACTIVATED (G%d)", hfctmp->cardno, l1state);
++#endif
++			break;
++		    default:
++#ifdef RTAITIMING
++			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] layer 1 DEACTIVATED (G%d) [realtime]", hfctmp->cardno, l1state);
++#else
++			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] layer 1 DEACTIVATED (G%d)", hfctmp->cardno, l1state);
++#endif
++		}
++		if (l1state == 2) {
++		    hfc_outb(hfctmp, hfc_STATES, hfc_STATES_ACTIVATE | hfc_STATES_DO_ACTION | hfc_STATES_NT_G2_G3);
++		} else if (l1state == 3) {
++		    // fix to G3 state (see specs)
++		    hfc_outb(hfctmp, hfc_STATES, hfc_STATES_LOAD_STATE | 3);
++		}
++	    } else {
++		if (debug) {
++	    	    printk(KERN_CRIT "zaphfc: card %d layer 1 state = F%d\n", hfctmp->cardno, l1state);
++		}
++		switch (l1state) {
++		    case 7:
++#ifdef RTAITIMING
++			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] layer 1 ACTIVATED (F%d) [realtime]", hfctmp->cardno, l1state);
++#else
++			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] layer 1 ACTIVATED (F%d)", hfctmp->cardno, l1state);
++#endif
++			break;
++		    default:
++#ifdef RTAITIMING
++			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] layer 1 DEACTIVATED (F%d) [realtime]", hfctmp->cardno, l1state);
++#else
++			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] layer 1 DEACTIVATED (F%d)", hfctmp->cardno, l1state);
++#endif
++		}
++		if (l1state == 3) {
++		    hfc_outb(hfctmp, hfc_STATES, hfc_STATES_DO_ACTION | hfc_STATES_ACTIVATE);
++		}
++	    }
++	    
++	}
++	if (s1 & hfc_INTS_DREC) {
++	    // D chan RX (bit 5)
++	    hfctmp->regs.int_drec++;
++	    // mr. zapata there is something for you!
++	//    printk(KERN_CRIT "d chan rx\n");		    
++	}
++	if (s1 & hfc_INTS_B2REC) {
++	    // B2 chan RX (bit 4)
++	}
++	if (s1 & hfc_INTS_B1REC) {
++	    // B1 chan RX (bit 3)
++	}
++	if (s1 & hfc_INTS_DTRANS) {
++	    // D chan TX (bit 2)
++//	    printk(KERN_CRIT "zaphfc: dchan frame transmitted.\n");
++	}
++	if (s1 & hfc_INTS_B2TRANS) {
++	    // B2 chan TX (bit 1)
++	}
++	if (s1 & hfc_INTS_B1TRANS) {
++	    // B1 chan TX (bit 0)
++	}
++    }
++#ifdef RTAITIMING
++    /* fake an irq */
++    s2 |= hfc_M2_PROC_TRANS;
++#endif
++    if (s2 != 0) {
++	if (s2 & hfc_M2_PMESEL) {
++	    // kaboom irq (bit 7)
++	    printk(KERN_CRIT "zaphfc: sync lost, pci performance too low. you might have some cpu throtteling enabled.\n");
++	}
++	if (s2 & hfc_M2_GCI_MON_REC) {
++	    // RxR monitor channel (bit 2)
++	}
++	if (s2 & hfc_M2_GCI_I_CHG) {
++	    // GCI I-change  (bit 1)
++	}
++	if (s2 & hfc_M2_PROC_TRANS) {
++	    // processing/non-processing transition  (bit 0)
++	    hfctmp->ticks++;
++#ifndef RTAITIMING
++	    if (hfctmp->ticks > 7) {
++		// welcome to DAHDI timing :)
++#endif
++	    	hfctmp->ticks = 0;
++
++		if (hfctmp->ztdev->span.flags & DAHDI_FLAG_RUNNING) {
++		    // clear dchan buffer
++		    hfctmp->ztdev->chans[2].bytes2transmit = 0;
++		    hfctmp->ztdev->chans[2].maxbytes2transmit = hfc_D_FIFO_SIZE;
++
++		    dahdi_transmit(&(hfctmp->ztdev->span));
++
++		    hfc_btrans(hfctmp,1);
++		    hfc_btrans(hfctmp,2);
++		    hfc_dtrans(hfctmp);
++		}
++
++		hfc_brec(hfctmp,1);
++		hfc_brec(hfctmp,2);
++		if (hfctmp->regs.int_drec > 0) {
++		    // dchan data to read
++		    hfc_drec(hfctmp);
++		    if (hfctmp->ztdev->chans[2].bytes2receive > 0) {
++			    if (debug) {
++    				printk(KERN_CRIT "zaphfc: card %d RX [ ", hfctmp->cardno);
++				if (hfctmp->ztdev->chans[2].eofrx) {
++				    /* dont output CRC == less user confusion */
++				    for (x=0; x < hfctmp->ztdev->chans[2].bytes2receive - 2; x++) {
++					printk("%#2x ", hfctmp->drecbuf[x]);
++				    }
++				    printk("] %d bytes\n", hfctmp->ztdev->chans[2].bytes2receive - 2);
++				} else {
++				    for (x=0; x < hfctmp->ztdev->chans[2].bytes2receive; x++) {
++					printk("%#2x ", hfctmp->drecbuf[x]);
++				    }
++				    printk("..] %d bytes\n", hfctmp->ztdev->chans[2].bytes2receive);
++				}
++			    }
++		    }
++		} else {
++			// hmm....ok, let DAHDI receive nothing
++		    hfctmp->ztdev->chans[2].bytes2receive = 0;
++		}
++		if (hfctmp->ztdev->span.flags & DAHDI_FLAG_RUNNING) {
++		    dahdi_receive(&(hfctmp->ztdev->span));
++		}
++		
++#ifndef RTAITIMING
++	    }
++#endif
++	}
++
++    }
++#ifndef RTAITIMING
++    spin_unlock_irqrestore(&hfctmp->lock,flags);
++	return IRQ_RETVAL(1);
++#endif
++}
++
++
++static int zthfc_open(struct dahdi_chan *chan) {
++    struct dahdi_hfc *zthfc = chan->pvt;
++    struct hfc_card *hfctmp = zthfc->card;
++    
++    if (!hfctmp) {
++    return 0;
++    }
++    try_module_get(THIS_MODULE);
++    return 0;
++}
++
++static int zthfc_close(struct dahdi_chan *chan) {
++    struct dahdi_hfc *zthfc = chan->pvt;
++    struct hfc_card *hfctmp = zthfc->card;
++
++    if (!hfctmp) {
++	return 0;
++    }
++
++    module_put(THIS_MODULE);
++    return 0;
++}
++
++static int zthfc_rbsbits(struct dahdi_chan *chan, int bits) {
++    return 0;
++}
++
++static int zthfc_ioctl(struct dahdi_chan *chan, unsigned int cmd, unsigned long data) {
++        switch(cmd) {
++        default:
++                return -ENOTTY;
++        }
++        return 0;
++}
++
++static int zthfc_startup(struct dahdi_span *span) {
++    struct dahdi_hfc *zthfc = span->pvt;
++    struct hfc_card *hfctmp = zthfc->card;
++    int alreadyrunning;
++    
++    if (hfctmp == NULL) {
++	printk(KERN_INFO "zaphfc: no card for span at startup!\n");
++    }
++    alreadyrunning = span->flags & DAHDI_FLAG_RUNNING;
++    
++    if (!alreadyrunning) {
++	span->chans[2]->flags &= ~DAHDI_FLAG_HDLC;
++	span->chans[2]->flags |= DAHDI_FLAG_BRIDCHAN;
++	
++	span->flags |= DAHDI_FLAG_RUNNING;
++
++	hfctmp->ticks = -2;
++	hfctmp->clicks = 0;
++	hfctmp->regs.fifo_en = hfc_FIFOEN_D | hfc_FIFOEN_B1 | hfc_FIFOEN_B2;
++        hfc_outb(hfctmp, hfc_FIFO_EN, hfctmp->regs.fifo_en);
++    } else {
++	return 0;
++    }
++
++    // drivers, start engines!
++    hfc_outb(hfctmp, hfc_STATES, hfc_STATES_DO_ACTION | hfc_STATES_ACTIVATE);
++    return 0;
++}
++
++static int zthfc_shutdown(struct dahdi_span *span) {
++    return 0;
++}
++
++static int zthfc_maint(struct dahdi_span *span, int cmd) {
++    return 0;
++}
++
++static int zthfc_chanconfig(struct dahdi_chan *chan, int sigtype) {
++//    printk(KERN_CRIT "chan_config sigtype=%d\n", sigtype);
++    return 0;
++}
++
++static int zthfc_spanconfig(struct dahdi_span *span, struct dahdi_lineconfig *lc) {
++    span->lineconfig = lc->lineconfig;
++    return 0;
++}
++
++static int zthfc_initialize(struct dahdi_hfc *zthfc) {
++    struct hfc_card *hfctmp = zthfc->card;
++    int i;
++
++    memset(&zthfc->span, 0x0, sizeof(struct dahdi_span)); // you never can tell...
++
++    sprintf(zthfc->span.name, "ZTHFC%d", hfc_dev_count + 1);
++    if (hfctmp->regs.nt_mode == 1) {
++#ifdef RTAITIMING
++	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] [realtime]", hfc_dev_count + 1);
++#else
++	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT]", hfc_dev_count + 1);
++#endif
++    } else {
++#ifdef RTAITIMING
++	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] [realtime]", hfc_dev_count + 1);
++#else
++	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE]", hfc_dev_count + 1);
++#endif
++    }
++
++    zthfc->span.spanconfig = zthfc_spanconfig;
++    zthfc->span.chanconfig = zthfc_chanconfig;
++    zthfc->span.startup = zthfc_startup;
++    zthfc->span.shutdown = zthfc_shutdown;
++    zthfc->span.maint = zthfc_maint;
++    zthfc->span.rbsbits = zthfc_rbsbits;
++    zthfc->span.open = zthfc_open;
++    zthfc->span.close = zthfc_close;
++    zthfc->span.ioctl = zthfc_ioctl;
++
++    zthfc->span.channels = 3;
++    zthfc->span.chans = zthfc->_chans;
++    for (i = 0; i < zthfc->span.channels; i++)
++	zthfc->_chans[i] = &zthfc->chans[i];
++
++    zthfc->span.deflaw = DAHDI_LAW_ALAW;
++    zthfc->span.linecompat = DAHDI_CONFIG_AMI | DAHDI_CONFIG_CCS; // <--- this is really BS
++    zthfc->span.offset = 0;
++    init_waitqueue_head(&zthfc->span.maintq);
++    zthfc->span.pvt = zthfc;
++
++    for (i = 0; i < zthfc->span.channels; i++) {
++	memset(&(zthfc->chans[i]), 0x0, sizeof(struct dahdi_chan));
++	sprintf(zthfc->chans[i].name, "ZTHFC%d/%d/%d", hfc_dev_count + 1,0,i + 1);
++	zthfc->chans[i].pvt = zthfc;
++	zthfc->chans[i].sigcap =  DAHDI_SIG_EM | DAHDI_SIG_CLEAR | DAHDI_SIG_FXSLS | DAHDI_SIG_FXSGS | DAHDI_SIG_FXSKS | DAHDI_SIG_FXOLS | DAHDI_SIG_FXOGS | DAHDI_SIG_FXOKS | DAHDI_SIG_CAS | DAHDI_SIG_SF;
++	zthfc->chans[i].chanpos = i + 1; 
++    }
++
++    if (dahdi_register(&zthfc->span,0)) {
++	printk(KERN_CRIT "unable to register DAHDI device!\n");
++	return -1;
++    }
++//    printk(KERN_CRIT "zaphfc: registered DAHDI device!\n");
++    return 0;
++}
++
++#ifdef RTAITIMING
++#define TICK_PERIOD  1000000
++#define TICK_PERIOD2 1000000000
++#define TASK_PRIORITY 1
++#define STACK_SIZE 10000
++
++static RT_TASK rt_task;
++static struct hfc_card *rtai_hfc_list[hfc_MAX_CARDS];
++static unsigned char rtai_hfc_counter = 0;
++
++static void rtai_register_hfc(struct hfc_card *hfctmp) {
++    rtai_hfc_list[rtai_hfc_counter++] = hfctmp;
++}
++
++static void rtai_loop(int t) {
++    int i=0;
++    for (;;) {
++	for (i=0; i < rtai_hfc_counter; i++) {
++	    if (rtai_hfc_list[i] != NULL)
++		hfc_service(rtai_hfc_list[i]);
++	}
++        rt_task_wait_period();
++    }
++}
++#endif
++
++int hfc_findCards(int pcivendor, int pcidevice, char *vendor_name, char *card_name) {
++    struct pci_dev *tmp;
++    struct hfc_card *hfctmp = NULL;
++    struct dahdi_hfc *zthfc = NULL;
++
++    tmp = pci_get_device(pcivendor, pcidevice, multi_hfc);
++    while (tmp != NULL) {
++	multi_hfc = tmp;	// skip this next time.
++
++	if (pci_enable_device(tmp)) {
++	    multi_hfc = NULL;
++	    return -1;
++	}
++	pci_set_master(tmp);
++
++	hfctmp = kmalloc(sizeof(struct hfc_card), GFP_KERNEL);
++	if (!hfctmp) {
++	    printk(KERN_WARNING "zaphfc: unable to kmalloc!\n");
++	    pci_disable_device(tmp);
++	    multi_hfc = NULL;
++	    return -ENOMEM;
++	}
++	memset(hfctmp, 0x0, sizeof(struct hfc_card));
++	spin_lock_init(&hfctmp->lock);
++	
++	hfctmp->pcidev = tmp;
++	hfctmp->pcibus = tmp->bus->number;
++	hfctmp->pcidevfn = tmp->devfn; 
++
++	if (!tmp->irq) {
++	    printk(KERN_WARNING "zaphfc: no irq!\n");
++	} else {
++	    hfctmp->irq = tmp->irq;
++	}
++
++	hfctmp->pci_io = (char *) tmp->resource[1].start;
++	if (!hfctmp->pci_io) {
++	    printk(KERN_WARNING "zaphfc: no iomem!\n");
++	    kfree(hfctmp);
++	    pci_disable_device(tmp);
++	    multi_hfc = NULL;
++	    return -1;
++	}
++	
++	hfctmp->fifomem = kmalloc(65536, GFP_KERNEL);
++	if (!hfctmp->fifomem) {
++	    printk(KERN_WARNING "zaphfc: unable to kmalloc fifomem!\n");
++	    kfree(hfctmp);
++	    pci_disable_device(tmp);
++	    multi_hfc = NULL;
++	    return -ENOMEM;
++	} else {
++	    memset(hfctmp->fifomem, 0x0, 65536);
++	    hfctmp->fifos = (void *)(((ulong) hfctmp->fifomem) & ~0x7FFF) + 0x8000;
++	    pci_write_config_dword(hfctmp->pcidev, 0x80, (u_int) virt_to_bus(hfctmp->fifos));
++	    hfctmp->pci_io = ioremap((ulong) hfctmp->pci_io, 256);
++	}
++
++#ifdef RTAITIMING
++	/* we need no stinking irq */
++	hfctmp->irq = 0;
++#else
++	if (request_irq(hfctmp->irq, &hfc_interrupt, IRQF_SHARED, "zaphfc", hfctmp)) {
++	    printk(KERN_WARNING "zaphfc: unable to register irq\n");
++	    kfree(hfctmp->fifomem);
++	    kfree(hfctmp);
++	    iounmap((void *) hfctmp->pci_io);
++	    pci_disable_device(tmp);
++	    multi_hfc = NULL;
++	    return -EIO;
++	}
++#endif
++
++#ifdef RTAITIMING
++	rtai_register_hfc(hfctmp);
++#endif
++	printk(KERN_INFO
++		       "zaphfc: %s %s configured at mem %lx fifo %lx(%#x) IRQ %d HZ %d\n",
++			vendor_name, card_name,
++		       (unsigned long) hfctmp->pci_io,
++		       (unsigned long) hfctmp->fifos,
++		       (u_int) virt_to_bus(hfctmp->fifos),
++		       hfctmp->irq, HZ); 
++	pci_write_config_word(hfctmp->pcidev, PCI_COMMAND, PCI_COMMAND_MEMORY);	// enable memio
++	hfctmp->regs.int_m1 = 0;	// no ints
++	hfctmp->regs.int_m2 = 0;	// not at all
++	hfc_outb(hfctmp,hfc_INT_M1,hfctmp->regs.int_m1);
++	hfc_outb(hfctmp,hfc_INT_M2,hfctmp->regs.int_m2);
++
++	if ((modes & (1 << hfc_dev_count)) != 0) {
++	    printk(KERN_INFO "zaphfc: Card %d configured for NT mode\n",hfc_dev_count);
++	    hfctmp->regs.nt_mode = 1;
++	} else {
++	    printk(KERN_INFO "zaphfc: Card %d configured for TE mode\n",hfc_dev_count);
++	    hfctmp->regs.nt_mode = 0;
++	}
++
++	zthfc = kmalloc(sizeof(struct dahdi_hfc),GFP_KERNEL);
++	if (!zthfc) {
++	    printk(KERN_CRIT "zaphfc: unable to kmalloc!\n");
++	    hfc_shutdownCard(hfctmp);
++	    kfree(hfctmp);
++	    multi_hfc = NULL;
++	    return -ENOMEM;
++	}
++	memset(zthfc, 0x0, sizeof(struct dahdi_hfc));
++
++	zthfc->card = hfctmp;
++	zthfc_initialize(zthfc);
++	hfctmp->ztdev = zthfc;
++
++	memset(hfctmp->drecbuf, 0x0, sizeof(hfctmp->drecbuf));
++	hfctmp->ztdev->chans[2].readchunk = hfctmp->drecbuf;
++
++	memset(hfctmp->dtransbuf, 0x0, sizeof(hfctmp->dtransbuf));
++	hfctmp->ztdev->chans[2].writechunk = hfctmp->dtransbuf;
++
++	memset(hfctmp->brecbuf[0], 0x0, sizeof(hfctmp->brecbuf[0]));
++	hfctmp->ztdev->chans[0].readchunk = hfctmp->brecbuf[0];
++	memset(hfctmp->btransbuf[0], 0x0, sizeof(hfctmp->btransbuf[0]));
++	hfctmp->ztdev->chans[0].writechunk = hfctmp->btransbuf[0];
++
++	memset(hfctmp->brecbuf[1], 0x0, sizeof(hfctmp->brecbuf[1]));
++	hfctmp->ztdev->chans[1].readchunk = hfctmp->brecbuf[1];
++	memset(hfctmp->btransbuf[1], 0x0, sizeof(hfctmp->btransbuf[1]));
++	hfctmp->ztdev->chans[1].writechunk = hfctmp->btransbuf[1];
++
++
++	hfc_registerCard(hfctmp);
++	hfc_resetCard(hfctmp);
++	tmp = pci_get_device(pcivendor, pcidevice, multi_hfc);
++    }
++    return 0;
++}
++
++
++
++int init_module(void) {
++    int i = 0;
++#ifdef RTAITIMING
++    RTIME tick_period;
++    for (i=0; i < hfc_MAX_CARDS; i++) {
++	rtai_hfc_list[i] = NULL;
++    }
++    rt_set_periodic_mode();
++#endif
++    i = 0;
++    while (id_list[i].vendor_id) {
++	multi_hfc = NULL;
++	hfc_findCards(id_list[i].vendor_id, id_list[i].device_id, id_list[i].vendor_name, id_list[i].card_name);
++	i++;
++    }
++#ifdef RTAITIMING
++    for (i=0; i < hfc_MAX_CARDS; i++) {
++        if (rtai_hfc_list[i]) {
++	    printk(KERN_INFO
++		       "zaphfc: configured %d at mem %#x fifo %#x(%#x) for realtime servicing\n",
++			rtai_hfc_list[i]->cardno,
++		       (u_int) rtai_hfc_list[i]->pci_io,
++		       (u_int) rtai_hfc_list[i]->fifos,
++		       (u_int) virt_to_bus(rtai_hfc_list[i]->fifos));
++
++	}
++    }
++    rt_task_init(&rt_task, rtai_loop, 1, STACK_SIZE, TASK_PRIORITY, 0, 0);
++    tick_period = start_rt_timer(nano2count(TICK_PERIOD));
++    rt_task_make_periodic(&rt_task, rt_get_time() + tick_period, tick_period);
++#endif
++    printk(KERN_INFO "zaphfc: %d hfc-pci card(s) in this box.\n", hfc_dev_count);
++    return 0;
++}
++
++void cleanup_module(void) {
++    struct hfc_card *tmpcard;
++#ifdef RTAITIMING
++    stop_rt_timer();
++    rt_task_delete(&rt_task);
++#endif
++    printk(KERN_INFO "zaphfc: stop\n");
++//    spin_lock(&registerlock);
++    while (hfc_dev_list != NULL) {
++	if (hfc_dev_list == NULL) break;
++	hfc_shutdownCard(hfc_dev_list);
++	tmpcard = hfc_dev_list;
++	hfc_dev_list = hfc_dev_list->next;
++	if (tmpcard != NULL) {
++	    kfree(tmpcard);
++	    tmpcard = NULL;
++	    printk(KERN_INFO "zaphfc: freed one card.\n");
++	}
++    }
++//    spin_unlock(&registerlock);
++}
++#endif
++
++
++module_param(modes, int, 0600);
++module_param(debug, int, 0600);
++
++MODULE_DESCRIPTION("HFC-S PCI A Zaptel Driver");
++MODULE_AUTHOR("Klaus-Peter Junghanns <kpj@junghanns.net>");
++#ifdef MODULE_LICENSE
++MODULE_LICENSE("GPL");
++#endif	
+Index: dahdi-linux-2.1.0/drivers/dahdi/zaphfc.h
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ dahdi-linux-2.1.0/drivers/dahdi/zaphfc.h	2008-12-10 12:46:14.000000000 +0200
+@@ -0,0 +1,290 @@
++/*
++ * zaphfc.h - Zaptel driver for HFC-S PCI A based ISDN BRI cards
++ *
++ * kernel module based on HFC PCI ISDN4Linux and Zaptel drivers
++ *
++ * Copyright (C) 2002, 2003, 2004, 2005 Junghanns.NET GmbH
++ *
++ * Klaus-Peter Junghanns <kpj@junghanns.net>
++ *
++ * This program is free software and may be modified and
++ * distributed under the terms of the GNU Public License.
++ *
++ */
++
++/* HFC register addresses - accessed using memory mapped I/O */
++/* For a list, see datasheet section 3.2.1 at page 21 */
++
++#define hfc_outb(a,b,c) (writeb((c),(a)->pci_io+(b)))
++#define hfc_inb(a,b) (readb((a)->pci_io+(b)))
++
++/* GCI/IOM bus monitor registers */
++
++#define hfc_C_I       0x08
++#define hfc_TRxR      0x0C
++#define hfc_MON1_D    0x28
++#define hfc_MON2_D    0x2C
++
++
++/* GCI/IOM bus timeslot registers */
++
++#define hfc_B1_SSL    0x80
++#define hfc_B2_SSL    0x84
++#define hfc_AUX1_SSL  0x88
++#define hfc_AUX2_SSL  0x8C
++#define hfc_B1_RSL    0x90
++#define hfc_B2_RSL    0x94
++#define hfc_AUX1_RSL  0x98
++#define hfc_AUX2_RSL  0x9C
++
++/* GCI/IOM bus data registers */
++
++#define hfc_B1_D      0xA0
++#define hfc_B2_D      0xA4
++#define hfc_AUX1_D    0xA8
++#define hfc_AUX2_D    0xAC
++
++/* GCI/IOM bus configuration registers */
++
++#define hfc_MST_EMOD  0xB4
++#define hfc_MST_MODE	 0xB8
++#define hfc_CONNECT 	 0xBC
++
++
++/* Interrupt and status registers */
++
++#define hfc_FIFO_EN   0x44
++#define hfc_TRM       0x48
++#define hfc_B_MODE    0x4C
++#define hfc_CHIP_ID   0x58
++#define hfc_CIRM  	 0x60
++#define hfc_CTMT	 0x64
++#define hfc_INT_M1  	 0x68
++#define hfc_INT_M2  	 0x6C
++#define hfc_INT_S1  	 0x78
++#define hfc_INT_S2  	 0x7C
++#define hfc_STATUS  	 0x70
++
++/* S/T section registers */
++
++#define hfc_STATES  	 0xC0
++#define hfc_SCTRL  	 0xC4
++#define hfc_SCTRL_E   0xC8
++#define hfc_SCTRL_R   0xCC
++#define hfc_SQ  	 0xD0
++#define hfc_CLKDEL  	 0xDC
++#define hfc_B1_REC    0xF0
++#define hfc_B1_SEND   0xF0
++#define hfc_B2_REC    0xF4
++#define hfc_B2_SEND   0xF4
++#define hfc_D_REC     0xF8
++#define hfc_D_SEND    0xF8
++#define hfc_E_REC     0xFC
++
++/* Bits and values in various HFC PCI registers */
++
++/* bits in status register (READ) */
++#define hfc_STATUS_PCI_PROC   0x02
++#define hfc_STATUS_NBUSY	  0x04 
++#define hfc_STATUS_TIMER_ELAP 0x10
++#define hfc_STATUS_STATINT	  0x20
++#define hfc_STATUS_FRAMEINT	  0x40
++#define hfc_STATUS_ANYINT	  0x80
++
++/* bits in CTMT (Write) */
++#define hfc_CTMT_CLTIMER    0x80
++#define hfc_CTMT_TIM3_125   0x04
++#define hfc_CTMT_TIM25      0x10
++#define hfc_CTMT_TIM50      0x14
++#define hfc_CTMT_TIM400     0x18
++#define hfc_CTMT_TIM800     0x1C
++#define hfc_CTMT_AUTO_TIMER 0x20
++#define hfc_CTMT_TRANSB2    0x02
++#define hfc_CTMT_TRANSB1    0x01
++
++/* bits in CIRM (Write) */
++#define hfc_CIRM_AUX_MSK    0x07
++#define hfc_CIRM_RESET  	  0x08
++#define hfc_CIRM_B1_REV     0x40
++#define hfc_CIRM_B2_REV     0x80
++
++/* bits in INT_M1 and INT_S1 */
++#define hfc_INTS_B1TRANS  0x01
++#define hfc_INTS_B2TRANS  0x02
++#define hfc_INTS_DTRANS   0x04
++#define hfc_INTS_B1REC    0x08
++#define hfc_INTS_B2REC    0x10
++#define hfc_INTS_DREC     0x20
++#define hfc_INTS_L1STATE  0x40
++#define hfc_INTS_TIMER    0x80
++
++/* bits in INT_M2 */
++#define hfc_M2_PROC_TRANS    0x01
++#define hfc_M2_GCI_I_CHG     0x02
++#define hfc_M2_GCI_MON_REC   0x04
++#define hfc_M2_IRQ_ENABLE    0x08
++#define hfc_M2_PMESEL        0x80
++
++/* bits in STATES */
++#define hfc_STATES_STATE_MASK     0x0F
++#define hfc_STATES_LOAD_STATE    0x10
++#define hfc_STATES_ACTIVATE	     0x20
++#define hfc_STATES_DO_ACTION     0x40
++#define hfc_STATES_NT_G2_G3      0x80
++
++/* bits in HFCD_MST_MODE */
++#define hfc_MST_MODE_MASTER	     0x01
++#define hfc_MST_MODE_SLAVE         0x00
++/* remaining bits are for codecs control */
++
++/* bits in HFCD_SCTRL */
++#define hfc_SCTRL_B1_ENA	     0x01
++#define hfc_SCTRL_B2_ENA	     0x02
++#define hfc_SCTRL_MODE_TE        0x00
++#define hfc_SCTRL_MODE_NT        0x04
++#define hfc_SCTRL_LOW_PRIO	     0x08
++#define hfc_SCTRL_SQ_ENA	     0x10
++#define hfc_SCTRL_TEST	     0x20
++#define hfc_SCTRL_NONE_CAP	     0x40
++#define hfc_SCTRL_PWR_DOWN	     0x80
++
++/* bits in SCTRL_E  */
++#define hfc_SCTRL_E_AUTO_AWAKE    0x01
++#define hfc_SCTRL_E_DBIT_1        0x04
++#define hfc_SCTRL_E_IGNORE_COL    0x08
++#define hfc_SCTRL_E_CHG_B1_B2     0x80
++
++/* bits in FIFO_EN register */
++#define hfc_FIFOEN_B1TX   0x01
++#define hfc_FIFOEN_B1RX   0x02
++#define hfc_FIFOEN_B2TX   0x04
++#define hfc_FIFOEN_B2RX   0x08
++#define hfc_FIFOEN_DTX    0x10
++#define hfc_FIFOEN_DRX    0x20
++
++#define hfc_FIFOEN_B1     (hfc_FIFOEN_B1TX|hfc_FIFOEN_B1RX)
++#define hfc_FIFOEN_B2     (hfc_FIFOEN_B2TX|hfc_FIFOEN_B2RX)
++#define hfc_FIFOEN_D      (hfc_FIFOEN_DTX|hfc_FIFOEN_DRX)
++
++/* bits in the CONNECT register */
++#define hfc_CONNECT_B1_shift	0
++#define hfc_CONNECT_B2_shift	3
++
++#define	hfc_CONNECT_HFC_from_ST		0x0
++#define hfc_CONNECT_HFC_from_GCI	0x1
++#define hfc_CONNECT_ST_from_HFC		0x0
++#define hfc_CONNECT_ST_from_GCI		0x2
++#define hfc_CONNECT_GCI_from_HFC	0x0
++#define	hfc_CONNECT_GCI_from_ST		0x4
++
++/* bits in the __SSL and __RSL registers */
++#define	hfc_SRSL_STIO	0x40
++#define hfc_SRSL_ENABLE	0x80
++#define hfc_SRCL_SLOT_MASK	0x1f
++
++/* FIFO memory definitions */
++
++#define hfc_FMASK	0x000f
++#define hfc_ZMASK	0x01ff
++#define hfc_ZMASKB	0x1fff
++
++#define hfc_D_FIFO_SIZE	0x0200
++#define hfc_B_SUB_VAL	0x0200
++#define hfc_B_FIFO_SIZE	0x1E00
++#define hfc_MAX_DFRAMES	0x000f
++
++#define hfc_FIFO_DTX_Z1	0x2080
++#define hfc_FIFO_DTX_Z2 0x2082
++#define hfc_FIFO_DTX_F1	0x20a0
++#define hfc_FIFO_DTX_F2	0x20a1
++#define hfc_FIFO_DTX	0x0000
++#define hfc_FIFO_DTX_ZOFF	0x000
++
++#define hfc_FIFO_DRX_Z1	0x6080
++#define hfc_FIFO_DRX_Z2 0x6082
++#define hfc_FIFO_DRX_F1	0x60a0
++#define hfc_FIFO_DRX_F2	0x60a1
++#define hfc_FIFO_DRX	0x4000
++#define hfc_FIFO_DRX_ZOFF	0x4000
++
++#define hfc_FIFO_B1TX_Z1	0x2000
++#define hfc_FIFO_B1TX_Z2 	0x2002
++#define hfc_FIFO_B1RX_Z1	0x6000
++#define hfc_FIFO_B1RX_Z2 	0x6002
++
++#define hfc_FIFO_B1TX_F1	0x2080
++#define hfc_FIFO_B1TX_F2	0x2081
++#define hfc_FIFO_B1RX_F1	0x6080
++#define hfc_FIFO_B1RX_F2	0x6081
++
++#define hfc_FIFO_B1RX_ZOFF	0x4000
++#define hfc_FIFO_B1TX_ZOFF	0x0000
++
++#define hfc_FIFO_B2TX_Z1	0x2100
++#define hfc_FIFO_B2TX_Z2 	0x2102
++#define hfc_FIFO_B2RX_Z1	0x6100
++#define hfc_FIFO_B2RX_Z2 	0x6102
++
++#define hfc_FIFO_B2TX_F1	0x2180
++#define hfc_FIFO_B2TX_F2	0x2181
++#define hfc_FIFO_B2RX_F1	0x6180
++#define hfc_FIFO_B2RX_F2	0x6181
++
++#define hfc_FIFO_B2RX_ZOFF	0x6000
++#define hfc_FIFO_B2TX_ZOFF	0x2000
++
++#define hfc_BTRANS_THRESHOLD 128
++#define hfc_BTRANS_THRESMASK 0x00
++
++/* Structures */
++
++typedef struct hfc_regs {
++    unsigned char fifo_en;
++    unsigned char ctmt;
++    unsigned char int_m1;
++    unsigned char int_m2;
++    unsigned char sctrl;
++    unsigned char sctrl_e;
++    unsigned char sctrl_r;
++    unsigned char connect;
++    unsigned char trm;
++    unsigned char mst_mode;
++    unsigned char bswapped;
++    unsigned char nt_mode;
++    unsigned char int_drec;
++} hfc_regs;
++
++typedef struct hfc_card {
++    spinlock_t lock;
++    unsigned int irq;
++    unsigned int iomem;
++    int ticks;		
++    int clicks;		
++    unsigned char *pci_io;
++    void *fifomem;		// start of the shared mem
++    volatile void *fifos;	// 32k aligned mem for the fifos
++    struct hfc_regs regs;
++    unsigned int pcibus;
++    unsigned int pcidevfn;
++    struct pci_dev *pcidev;
++    struct dahdi_hfc *ztdev;
++    int	drecinframe;
++    unsigned char drecbuf[hfc_D_FIFO_SIZE];
++    unsigned char dtransbuf[hfc_D_FIFO_SIZE];
++    unsigned char brecbuf[2][DAHDI_CHUNKSIZE];
++    unsigned char btransbuf[2][DAHDI_CHUNKSIZE];
++    unsigned char cardno;
++    struct hfc_card *next;
++} hfc_card;
++
++typedef struct dahdi_hfc {
++    unsigned int usecount;
++    struct dahdi_span span;
++    struct dahdi_chan chans[3];
++    struct dahdi_chan *_chans[3];
++    struct hfc_card *card;
++} dahdi_hfc;
++
++/* tune this */
++#define hfc_BCHAN_BUFFER	8
++#define hfc_MAX_CARDS		8
diff --git a/main/dahdi-linux-vanilla/linux-3.13.patch b/main/dahdi-linux-vanilla/linux-3.13.patch
new file mode 100644
index 0000000000..220568995f
--- /dev/null
+++ b/main/dahdi-linux-vanilla/linux-3.13.patch
@@ -0,0 +1,12 @@
+diff --git a/drivers/dahdi/zaphfc.c b/drivers/dahdi/zaphfc.c
+index 0402b90..eb56f88 100644
+--- a/drivers/dahdi/zaphfc.c
++++ b/drivers/dahdi/zaphfc.c
+@@ -26,6 +26,7 @@
+ #include <linux/init.h>
+ #include <linux/interrupt.h>
+ #include <linux/delay.h>
++#include <linux/sched.h>
+ #include <dahdi/kernel.h>
+ #include "zaphfc.h"
+ 
diff --git a/main/dahdi-linux-vanilla/linux-4.11.patch b/main/dahdi-linux-vanilla/linux-4.11.patch
new file mode 100644
index 0000000000..2a8cb60ced
--- /dev/null
+++ b/main/dahdi-linux-vanilla/linux-4.11.patch
@@ -0,0 +1,141 @@
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/dahdi-base.c dahdi-linux-2.11.1-4.11/drivers/dahdi/dahdi-base.c
+--- dahdi-linux-2.11.1/drivers/dahdi/dahdi-base.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/dahdi-base.c	2017-05-09 20:34:45.170079849 +0200
+@@ -47,6 +47,9 @@
+ #include <linux/kmod.h>
+ #include <linux/moduleparam.h>
+ #include <linux/sched.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)
++#include <linux/sched/signal.h>
++#endif
+ #include <linux/list.h>
+ #include <linux/delay.h>
+ #include <linux/mutex.h>
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/dahdi_dynamic.c dahdi-linux-2.11.1-4.11/drivers/dahdi/dahdi_dynamic.c
+--- dahdi-linux-2.11.1/drivers/dahdi/dahdi_dynamic.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/dahdi_dynamic.c	2017-05-09 20:38:03.809649973 +0200
+@@ -467,7 +467,11 @@
+ 
+ 	/* We shouldn't have more than the two references at this point.  If
+ 	 * we do, there are probably channels that are still opened. */
++#if LINUX_VERSION_CODE < KERNEL_VERSION(4,11,0)
+ 	if (atomic_read(&d->kref.refcount) > 2) {
++#else
++	if (kref_read(&d->kref) > 2) {
++#endif
+ 		dynamic_put(d);
+ 		return -EBUSY;
+ 	}
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/wcaxx-base.c dahdi-linux-2.11.1-4.11/drivers/dahdi/wcaxx-base.c
+--- dahdi-linux-2.11.1/drivers/dahdi/wcaxx-base.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/wcaxx-base.c	2017-05-09 20:39:05.690553708 +0200
+@@ -28,6 +28,9 @@
+ #include <linux/init.h>
+ #include <linux/pci.h>
+ #include <linux/sched.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)
++#include <linux/sched/signal.h>
++#endif
+ #include <linux/workqueue.h>
+ #include <linux/delay.h>
+ #include <linux/moduleparam.h>
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/wctc4xxp/base.c dahdi-linux-2.11.1-4.11/drivers/dahdi/wctc4xxp/base.c
+--- dahdi-linux-2.11.1/drivers/dahdi/wctc4xxp/base.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/wctc4xxp/base.c	2017-05-09 20:40:14.041864392 +0200
+@@ -26,6 +26,10 @@
+ #include <linux/slab.h>
+ #include <linux/kmod.h>
+ #include <linux/sched.h>
++#include <linux/version.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)
++#include <linux/sched/signal.h>
++#endif
+ #include <linux/pci.h>
+ #include <linux/interrupt.h>
+ #include <linux/delay.h>
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/wctdm24xxp/base.c dahdi-linux-2.11.1-4.11/drivers/dahdi/wctdm24xxp/base.c
+--- dahdi-linux-2.11.1/drivers/dahdi/wctdm24xxp/base.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/wctdm24xxp/base.c	2017-05-09 20:39:47.343067209 +0200
+@@ -44,6 +44,9 @@
+ #include <linux/init.h>
+ #include <linux/pci.h>
+ #include <linux/sched.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)
++#include <linux/sched/signal.h>
++#endif
+ #include <linux/interrupt.h>
+ #include <linux/workqueue.h>
+ #include <linux/delay.h>
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/wcte12xp/base.c dahdi-linux-2.11.1-4.11/drivers/dahdi/wcte12xp/base.c
+--- dahdi-linux-2.11.1/drivers/dahdi/wcte12xp/base.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/wcte12xp/base.c	2017-05-09 20:40:31.216160114 +0200
+@@ -40,6 +40,10 @@
+ #include <linux/workqueue.h>
+ #include <linux/delay.h>
+ #include <linux/sched.h>
++#include <linux/version.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)
++#include <linux/sched/signal.h>
++#endif
+ #include <linux/slab.h>
+ 
+ #include <stdbool.h>
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/wcte43x-base.c dahdi-linux-2.11.1-4.11/drivers/dahdi/wcte43x-base.c
+--- dahdi-linux-2.11.1/drivers/dahdi/wcte43x-base.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/wcte43x-base.c	2017-05-09 20:38:38.996830549 +0200
+@@ -33,6 +33,10 @@
+ #include <linux/workqueue.h>
+ #include <linux/delay.h>
+ #include <linux/sched.h>
++#include <linux/version.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)
++#include <linux/sched/signal.h>
++#endif
+ #include <linux/crc32.h>
+ #include <linux/slab.h>
+ 
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/xpp/xbus-core.c dahdi-linux-2.11.1-4.11/drivers/dahdi/xpp/xbus-core.c
+--- dahdi-linux-2.11.1/drivers/dahdi/xpp/xbus-core.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/xpp/xbus-core.c	2017-05-09 20:41:27.973007253 +0200
+@@ -244,7 +244,11 @@
+ {
+ 	struct kref *kref = &xbus->kref;
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(4,11,0)
+ 	return atomic_read(&kref->refcount);
++#else
++	return kref_read(kref);
++#endif
+ }
+ 
+ /*------------------------- Frame  Handling ------------------------*/
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/xpp/xbus-sysfs.c dahdi-linux-2.11.1-4.11/drivers/dahdi/xpp/xbus-sysfs.c
+--- dahdi-linux-2.11.1/drivers/dahdi/xpp/xbus-sysfs.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/xpp/xbus-sysfs.c	2017-05-09 20:42:09.972886067 +0200
+@@ -974,7 +974,11 @@
+ 		return;
+ 	}
+ 	XBUS_DBG(DEVICES, xbus, "going to unregister: refcount=%d\n",
++#if LINUX_VERSION_CODE < KERNEL_VERSION(4,11,0)
+ 		atomic_read(&astribank->kobj.kref.refcount));
++#else
++		kref_read(&astribank->kobj.kref));
++#endif
+ 	BUG_ON(dev_get_drvdata(astribank) != xbus);
+ 	device_unregister(astribank);
+ 	dev_set_drvdata(astribank, NULL);
+diff -ur dahdi-linux-2.11.1/drivers/dahdi/xpp/xpp_dahdi.c dahdi-linux-2.11.1-4.11/drivers/dahdi/xpp/xpp_dahdi.c
+--- dahdi-linux-2.11.1/drivers/dahdi/xpp/xpp_dahdi.c	2016-03-01 23:03:59.000000000 +0100
++++ dahdi-linux-2.11.1-4.11/drivers/dahdi/xpp/xpp_dahdi.c	2017-05-09 20:42:55.336485638 +0200
+@@ -124,7 +124,11 @@
+ {
+ 	struct kref *kref = &xpd->kref;
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(4,11,0)
+ 	return atomic_read(&kref->refcount);
++#else
++	return kref_read(kref);
++#endif
+ }
+ 
+ xpd_t *get_xpd(const char *msg, xpd_t *xpd)
diff --git a/main/dahdi-linux-vanilla/linux-4.13.patch b/main/dahdi-linux-vanilla/linux-4.13.patch
new file mode 100644
index 0000000000..824e880a3e
--- /dev/null
+++ b/main/dahdi-linux-vanilla/linux-4.13.patch
@@ -0,0 +1,299 @@
+Index: dahdi-linux-2.11.1~dfsg/drivers/dahdi/dahdi-sysfs.c
+===================================================================
+--- dahdi-linux-2.11.1~dfsg.orig/drivers/dahdi/dahdi-sysfs.c
++++ dahdi-linux-2.11.1~dfsg/drivers/dahdi/dahdi-sysfs.c
+@@ -214,6 +214,7 @@ static BUS_ATTR_READER(linecompat_show,
+ 	return len;
+ }
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+ static struct device_attribute span_dev_attrs[] = {
+ 	__ATTR_RO(name),
+ 	__ATTR_RO(desc),
+@@ -230,6 +231,39 @@ static struct device_attribute span_dev_
+ 	__ATTR_RO(linecompat),
+ 	__ATTR_NULL,
+ };
++#else
++static DEVICE_ATTR_RO(name);
++static DEVICE_ATTR_RO(desc);
++static DEVICE_ATTR_RO(spantype);
++static DEVICE_ATTR_RO(local_spanno);
++static DEVICE_ATTR_RO(alarms);
++static DEVICE_ATTR_RO(lbo);
++static DEVICE_ATTR_RO(syncsrc);
++static DEVICE_ATTR_RO(is_digital);
++static DEVICE_ATTR_RO(is_sync_master);
++static DEVICE_ATTR_RO(basechan);
++static DEVICE_ATTR_RO(channels);
++static DEVICE_ATTR_RO(lineconfig);
++static DEVICE_ATTR_RO(linecompat);
++
++static struct attribute *span_dev_attrs[] = {
++	&dev_attr_name.attr,
++	&dev_attr_desc.attr,
++	&dev_attr_spantype.attr,
++	&dev_attr_local_spanno.attr,
++	&dev_attr_alarms.attr,
++	&dev_attr_lbo.attr,
++	&dev_attr_syncsrc.attr,
++	&dev_attr_is_digital.attr,
++	&dev_attr_is_sync_master.attr,
++	&dev_attr_basechan.attr,
++	&dev_attr_channels.attr,
++	&dev_attr_lineconfig.attr,
++	&dev_attr_linecompat.attr,
++	NULL,
++};
++ATTRIBUTE_GROUPS(span_dev);
++#endif
+ 
+ static ssize_t master_span_show(struct device_driver *driver, char *buf)
+ {
+@@ -270,10 +304,11 @@ static struct bus_type spans_bus_type =
+ 	.name           = "dahdi_spans",
+ 	.match          = span_match,
+ 	.uevent         = span_uevent,
+-	.dev_attrs	= span_dev_attrs,
+ #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
++	.dev_attrs	= span_dev_attrs,
+ 	.drv_attrs	= dahdi_attrs,
+ #else
++	.dev_groups	= span_dev_groups,
+ 	.drv_groups 	= dahdi_groups,
+ #endif
+ };
+@@ -690,6 +725,7 @@ dahdi_registration_time_show(struct devi
+ 	return count;
+ }
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+ static struct device_attribute dahdi_device_attrs[] = {
+ 	__ATTR(manufacturer, S_IRUGO, dahdi_device_manufacturer_show, NULL),
+ 	__ATTR(type, S_IRUGO, dahdi_device_type_show, NULL),
+@@ -704,11 +740,48 @@ static struct device_attribute dahdi_dev
+ 	__ATTR(registration_time, S_IRUGO, dahdi_registration_time_show, NULL),
+ 	__ATTR_NULL,
+ };
++#else
++static DEVICE_ATTR(manufacturer, S_IRUGO, dahdi_device_manufacturer_show, NULL);
++static DEVICE_ATTR(type, S_IRUGO, dahdi_device_type_show, NULL);
++static DEVICE_ATTR(span_count, S_IRUGO, dahdi_device_span_count_show, NULL);
++static DEVICE_ATTR(hardware_id, S_IRUGO, dahdi_device_hardware_id_show, NULL);
++static DEVICE_ATTR(location, S_IRUGO, dahdi_device_location_show, NULL);
++static DEVICE_ATTR(auto_assign, S_IWUSR, NULL, dahdi_device_auto_assign);
++static DEVICE_ATTR(assign_span, S_IWUSR, NULL, dahdi_device_assign_span);
++static DEVICE_ATTR(unassign_span, S_IWUSR, NULL, dahdi_device_unassign_span);
++/*
++ * Using DEVICE_ATTR for spantype attribute here will conflict with the
++ * span device attribute definition above. Define it somewhat more
++ * manually to give it a unique name.
++ */
++static struct device_attribute dahdi_dev_attr_spantype =
++	__ATTR(spantype, S_IWUSR | S_IRUGO, dahdi_spantype_show, dahdi_spantype_store);
++static DEVICE_ATTR(registration_time, S_IRUGO, dahdi_registration_time_show, NULL);
++
++static struct attribute *dahdi_device_attrs[] = {
++	&dev_attr_manufacturer.attr,
++	&dev_attr_type.attr,
++	&dev_attr_span_count.attr,
++	&dev_attr_hardware_id.attr,
++	&dev_attr_location.attr,
++	&dev_attr_auto_assign.attr,
++	&dev_attr_assign_span.attr,
++	&dev_attr_unassign_span.attr,
++	&dahdi_dev_attr_spantype.attr,
++	&dev_attr_registration_time.attr,
++	NULL,
++};
++ATTRIBUTE_GROUPS(dahdi_device);
++#endif
+ 
+ static struct bus_type dahdi_device_bus = {
+ 	.name = "dahdi_devices",
+ 	.uevent         = device_uevent,
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+ 	.dev_attrs = dahdi_device_attrs,
++#else
++	.dev_groups = dahdi_device_groups,
++#endif
+ };
+ 
+ static void dahdi_sysfs_cleanup(void)
+Index: dahdi-linux-2.11.1~dfsg/drivers/dahdi/dahdi-sysfs-chan.c
+===================================================================
+--- dahdi-linux-2.11.1~dfsg.orig/drivers/dahdi/dahdi-sysfs-chan.c
++++ dahdi-linux-2.11.1~dfsg/drivers/dahdi/dahdi-sysfs-chan.c
+@@ -158,6 +158,7 @@ static BUS_ATTR_READER(ec_state_show, de
+ 	return len;
+ }
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+ static struct device_attribute chan_dev_attrs[] = {
+ 	__ATTR_RO(name),
+ 	__ATTR_RO(channo),
+@@ -174,6 +175,39 @@ static struct device_attribute chan_dev_
+ 	__ATTR_RO(in_use),
+ 	__ATTR_NULL,
+ };
++#else
++static DEVICE_ATTR_RO(name);
++static DEVICE_ATTR_RO(channo);
++static DEVICE_ATTR_RO(chanpos);
++static DEVICE_ATTR_RO(sig);
++static DEVICE_ATTR_RO(sigcap);
++static DEVICE_ATTR_RO(alarms);
++static DEVICE_ATTR_RO(ec_factory);
++static DEVICE_ATTR_RO(ec_state);
++static DEVICE_ATTR_RO(blocksize);
++#ifdef OPTIMIZE_CHANMUTE
++static DEVICE_ATTR_RO(chanmute);
++#endif
++static DEVICE_ATTR_RO(in_use);
++
++static struct attribute *chan_dev_attrs[] = {
++	&dev_attr_name.attr,
++	&dev_attr_channo.attr,
++	&dev_attr_chanpos.attr,
++	&dev_attr_sig.attr,
++	&dev_attr_sigcap.attr,
++	&dev_attr_alarms.attr,
++	&dev_attr_ec_factory.attr,
++	&dev_attr_ec_state.attr,
++	&dev_attr_blocksize.attr,
++#ifdef OPTIMIZE_CHANMUTE
++	&dev_attr_chanmute.attr,
++#endif
++	&dev_attr_in_use.attr,
++	NULL,
++};
++ATTRIBUTE_GROUPS(chan_dev);
++#endif
+ 
+ static void chan_release(struct device *dev)
+ {
+@@ -196,7 +230,11 @@ static int chan_match(struct device *dev
+ static struct bus_type chan_bus_type = {
+ 	.name		= "dahdi_channels",
+ 	.match		= chan_match,
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+ 	.dev_attrs	= chan_dev_attrs,
++#else
++	.dev_groups     = chan_dev_groups,
++#endif
+ };
+ 
+ static int chan_probe(struct device *dev)
+Index: dahdi-linux-2.11.1~dfsg/drivers/dahdi/xpp/xbus-sysfs.c
+===================================================================
+--- dahdi-linux-2.11.1~dfsg.orig/drivers/dahdi/xpp/xbus-sysfs.c
++++ dahdi-linux-2.11.1~dfsg/drivers/dahdi/xpp/xbus-sysfs.c
+@@ -339,6 +339,7 @@ static DEVICE_ATTR_READER(dahdi_registra
+ 	return len;
+ }
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+ static struct device_attribute xbus_dev_attrs[] = {
+ 	__ATTR_RO(connector),
+ 	__ATTR_RO(label),
+@@ -358,6 +359,42 @@ static struct device_attribute xbus_dev_
+ 		dahdi_registration_store),
+ 	__ATTR_NULL,
+ };
++#else
++static DEVICE_ATTR_RO(connector);
++static DEVICE_ATTR_RO(label);
++static DEVICE_ATTR_RO(status);
++static DEVICE_ATTR_RO(timing);
++static DEVICE_ATTR_RO(refcount_xbus);
++static DEVICE_ATTR_RO(waitfor_xpds);
++static DEVICE_ATTR_RO(driftinfo);
++static DEVICE_ATTR(cls, S_IWUSR, NULL, cls_store);
++static DEVICE_ATTR(xbus_state, S_IRUGO | S_IWUSR, xbus_state_show,
++		   xbus_state_store);
++#ifdef	SAMPLE_TICKS
++static DEVICE_ATTR(samples, S_IWUSR | S_IRUGO, samples_show, samples_store);
++#endif
++static DEVICE_ATTR(dahdi_registration, S_IRUGO | S_IWUSR,
++		   dahdi_registration_show,
++		   dahdi_registration_store);
++
++static struct attribute *xbus_dev_attrs[] = {
++	&dev_attr_connector.attr,
++	&dev_attr_label.attr,
++	&dev_attr_status.attr,
++	&dev_attr_timing.attr,
++	&dev_attr_refcount_xbus.attr,
++	&dev_attr_waitfor_xpds.attr,
++	&dev_attr_driftinfo.attr,
++	&dev_attr_cls.attr,
++	&dev_attr_xbus_state.attr,
++#ifdef	SAMPLE_TICKS
++	&dev_attr_samples.attr,
++#endif
++	&dev_attr_dahdi_registration.attr,
++	NULL,
++};
++ATTRIBUTE_GROUPS(xbus_dev);
++#endif
+ 
+ static int astribank_match(struct device *dev, struct device_driver *driver)
+ {
+@@ -457,10 +494,11 @@ static struct bus_type toplevel_bus_type
+ 	.name = "astribanks",
+ 	.match = astribank_match,
+ 	.uevent = astribank_uevent,
+-	.dev_attrs = xbus_dev_attrs,
+ #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
++	.dev_attrs = xbus_dev_attrs,
+ 	.drv_attrs = xpp_attrs,
+ #else
++	.dev_groups = xbus_dev_groups,
+ 	.drv_groups = xpp_groups,
+ #endif
+ };
+@@ -744,6 +782,7 @@ static int xpd_match(struct device *dev,
+ 	return 1;
+ }
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+ static struct device_attribute xpd_dev_attrs[] = {
+ 	__ATTR(chipregs, S_IRUGO | S_IWUSR, chipregs_show, chipregs_store),
+ 	__ATTR(blink, S_IRUGO | S_IWUSR, blink_show, blink_store),
+@@ -754,11 +793,36 @@ static struct device_attribute xpd_dev_a
+ 	__ATTR_RO(refcount_xpd),
+ 	__ATTR_NULL,
+ };
++#else
++DEVICE_ATTR(chipregs, S_IRUGO | S_IWUSR, chipregs_show, chipregs_store);
++DEVICE_ATTR(blink, S_IRUGO | S_IWUSR, blink_show, blink_store);
++DEVICE_ATTR(span, S_IRUGO | S_IWUSR, span_show, span_store);
++DEVICE_ATTR_RO(type);
++DEVICE_ATTR_RO(offhook);
++DEVICE_ATTR_RO(timing_priority);
++DEVICE_ATTR_RO(refcount_xpd);
++
++static struct attribute *xpd_dev_attrs[] = {
++	&dev_attr_chipregs.attr,
++	&dev_attr_blink.attr,
++	&dev_attr_span.attr,
++	&dev_attr_type.attr,
++	&dev_attr_offhook.attr,
++	&dev_attr_timing_priority.attr,
++	&dev_attr_refcount_xpd.attr,
++	NULL,
++};
++ATTRIBUTE_GROUPS(xpd_dev);
++#endif
+ 
+ static struct bus_type xpd_type = {
+ 	.name = "xpds",
+ 	.match = xpd_match,
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+ 	.dev_attrs = xpd_dev_attrs,
++#else
++	.dev_groups = xpd_dev_groups,
++#endif
+ };
+ 
+ int xpd_driver_register(struct device_driver *driver)
diff --git a/main/dahdi-linux-vanilla/linux-4.4.patch b/main/dahdi-linux-vanilla/linux-4.4.patch
new file mode 100644
index 0000000000..fe6105319d
--- /dev/null
+++ b/main/dahdi-linux-vanilla/linux-4.4.patch
@@ -0,0 +1,10 @@
+--- ./drivers/dahdi/zaphfc.c.orig
++++ ./drivers/dahdi/zaphfc.c
+@@ -27,6 +27,7 @@
+ #include <linux/interrupt.h>
+ #include <linux/delay.h>
+ #include <linux/sched.h>
++#include <linux/vmalloc.h>
+ #include <dahdi/kernel.h>
+ #include "zaphfc.h"
+ 
diff --git a/main/dahdi-linux-vanilla/zaphfc-dahdi-2.4.0.patch b/main/dahdi-linux-vanilla/zaphfc-dahdi-2.4.0.patch
new file mode 100644
index 0000000000..80500a574a
--- /dev/null
+++ b/main/dahdi-linux-vanilla/zaphfc-dahdi-2.4.0.patch
@@ -0,0 +1,58 @@
+Index: dahdi-linux-2.4.0/drivers/dahdi/zaphfc.c
+===================================================================
+--- dahdi-linux-2.4.0.orig/drivers/dahdi/zaphfc.c	2010-10-26 14:41:21.000000000 +0300
++++ dahdi-linux-2.4.0/drivers/dahdi/zaphfc.c	2010-10-26 14:50:14.000000000 +0300
+@@ -617,7 +617,7 @@
+ }
+ 
+ static int zthfc_startup(struct dahdi_span *span) {
+-    struct dahdi_hfc *zthfc = span->pvt;
++    struct dahdi_hfc *zthfc = container_of(span, struct dahdi_hfc, span);
+     struct hfc_card *hfctmp = zthfc->card;
+     int alreadyrunning;
+     
+@@ -663,6 +663,19 @@
+     return 0;
+ }
+ 
++static const struct dahdi_span_ops zaphfc_span_ops = {
++    .owner = THIS_MODULE,
++    .spanconfig = zthfc_spanconfig,
++    .chanconfig = zthfc_chanconfig,
++    .startup = zthfc_startup,
++    .shutdown = zthfc_shutdown,
++    .maint = zthfc_maint,
++    .rbsbits = zthfc_rbsbits,
++    .open = zthfc_open,
++    .close = zthfc_close,
++    .ioctl = zthfc_ioctl,
++};
++
+ static int zthfc_initialize(struct dahdi_hfc *zthfc) {
+     struct hfc_card *hfctmp = zthfc->card;
+     int i;
+@@ -676,15 +689,7 @@
+ 	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE]", hfc_dev_count + 1);
+     }
+ 
+-    zthfc->span.spanconfig = zthfc_spanconfig;
+-    zthfc->span.chanconfig = zthfc_chanconfig;
+-    zthfc->span.startup = zthfc_startup;
+-    zthfc->span.shutdown = zthfc_shutdown;
+-    zthfc->span.maint = zthfc_maint;
+-    zthfc->span.rbsbits = zthfc_rbsbits;
+-    zthfc->span.open = zthfc_open;
+-    zthfc->span.close = zthfc_close;
+-    zthfc->span.ioctl = zthfc_ioctl;
++    zthfc->span.ops = &zaphfc_span_ops;
+ 
+     zthfc->span.channels = 3;
+     zthfc->span.chans = zthfc->_chans;
+@@ -695,7 +700,6 @@
+     zthfc->span.linecompat = DAHDI_CONFIG_AMI | DAHDI_CONFIG_CCS; // <--- this is really BS
+     zthfc->span.offset = 0;
+     init_waitqueue_head(&zthfc->span.maintq);
+-    zthfc->span.pvt = zthfc;
+ 
+     for (i = 0; i < zthfc->span.channels; i++) {
+ 	memset(&(zthfc->chans[i]), 0x0, sizeof(struct dahdi_chan));
diff --git a/main/dahdi-linux-vanilla/zaphfc-dahdi-2.5.0.patch b/main/dahdi-linux-vanilla/zaphfc-dahdi-2.5.0.patch
new file mode 100644
index 0000000000..37a1e76ba8
--- /dev/null
+++ b/main/dahdi-linux-vanilla/zaphfc-dahdi-2.5.0.patch
@@ -0,0 +1,36 @@
+Index: dahdi-linux-2.5.0/drivers/dahdi/zaphfc.c
+===================================================================
+--- dahdi-linux-2.5.0.orig/drivers/dahdi/zaphfc.c	2011-08-15 14:29:51.000000000 +0300
++++ dahdi-linux-2.5.0/drivers/dahdi/zaphfc.c	2011-08-15 14:30:11.000000000 +0300
+@@ -616,7 +616,7 @@
+         return 0;
+ }
+ 
+-static int zthfc_startup(struct dahdi_span *span) {
++static int zthfc_startup(struct file *file, struct dahdi_span *span) {
+     struct dahdi_hfc *zthfc = container_of(span, struct dahdi_hfc, span);
+     struct hfc_card *hfctmp = zthfc->card;
+     int alreadyrunning;
+@@ -653,12 +653,12 @@
+     return 0;
+ }
+ 
+-static int zthfc_chanconfig(struct dahdi_chan *chan, int sigtype) {
++static int zthfc_chanconfig(struct file *file, struct dahdi_chan *chan, int sigtype) {
+ //    printk(KERN_CRIT "chan_config sigtype=%d\n", sigtype);
+     return 0;
+ }
+ 
+-static int zthfc_spanconfig(struct dahdi_span *span, struct dahdi_lineconfig *lc) {
++static int zthfc_spanconfig(struct file *file, struct dahdi_span *span, struct dahdi_lineconfig *lc) {
+     span->lineconfig = lc->lineconfig;
+     return 0;
+ }
+@@ -699,7 +699,6 @@
+     zthfc->span.deflaw = DAHDI_LAW_ALAW;
+     zthfc->span.linecompat = DAHDI_CONFIG_AMI | DAHDI_CONFIG_CCS; // <--- this is really BS
+     zthfc->span.offset = 0;
+-    init_waitqueue_head(&zthfc->span.maintq);
+ 
+     for (i = 0; i < zthfc->span.channels; i++) {
+ 	memset(&(zthfc->chans[i]), 0x0, sizeof(struct dahdi_chan));
diff --git a/main/dahdi-linux-vanilla/zaphfc-dahdi-2.6.0.patch b/main/dahdi-linux-vanilla/zaphfc-dahdi-2.6.0.patch
new file mode 100644
index 0000000000..5a77438462
--- /dev/null
+++ b/main/dahdi-linux-vanilla/zaphfc-dahdi-2.6.0.patch
@@ -0,0 +1,58 @@
+--- dahdi-linux-2.6.0/drivers/dahdi/zaphfc.c.orig	2012-01-25 14:08:58.000000000 +0200
++++ dahdi-linux-2.6.0/drivers/dahdi/zaphfc.c	2012-01-25 14:29:26.000000000 +0200
+@@ -122,7 +122,10 @@
+     }
+     spin_unlock_irqrestore(&hfctmp->lock,flags);
+     if (hfctmp->ztdev != NULL) {
+-	dahdi_unregister(&hfctmp->ztdev->span);
++	if (hfctmp->ztdev->ddev) {
++	    dahdi_unregister_device(hfctmp->ztdev->ddev);
++	    dahdi_free_device(hfctmp->ztdev->ddev);
++	}
+ 	vfree(hfctmp->ztdev);
+ 	printk(KERN_INFO "unregistered from DAHDI.\n");
+     }
+@@ -680,9 +683,15 @@
+     struct hfc_card *hfctmp = zthfc->card;
+     int i;
+ 
++    zthfc->ddev = dahdi_create_device();
++    if (!zthfc->ddev)
++	return -ENOMEM;
++
++    zthfc->ddev->manufacturer = "HFC";
++
+     memset(&zthfc->span, 0x0, sizeof(struct dahdi_span)); // you never can tell...
+ 
+-    sprintf(zthfc->span.name, "ZTHFC%d", hfc_dev_count + 1);
++    sprintf(zthfc->span.name, "ZTHFC/%d", hfc_dev_count + 1);
+     if (hfctmp->regs.nt_mode == 1) {
+ 	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT]", hfc_dev_count + 1);
+     } else {
+@@ -702,13 +711,14 @@
+ 
+     for (i = 0; i < zthfc->span.channels; i++) {
+ 	memset(&(zthfc->chans[i]), 0x0, sizeof(struct dahdi_chan));
+-	sprintf(zthfc->chans[i].name, "ZTHFC%d/%d/%d", hfc_dev_count + 1,0,i + 1);
++	sprintf(zthfc->chans[i].name, "ZTHFC/%d/%d/%d", hfc_dev_count + 1,0,i + 1);
+ 	zthfc->chans[i].pvt = zthfc;
+ 	zthfc->chans[i].sigcap =  DAHDI_SIG_EM | DAHDI_SIG_CLEAR | DAHDI_SIG_FXSLS | DAHDI_SIG_FXSGS | DAHDI_SIG_FXSKS | DAHDI_SIG_FXOLS | DAHDI_SIG_FXOGS | DAHDI_SIG_FXOKS | DAHDI_SIG_CAS | DAHDI_SIG_SF;
+ 	zthfc->chans[i].chanpos = i + 1; 
+     }
+ 
+-    if (dahdi_register(&zthfc->span,0)) {
++    list_add_tail(&zthfc->span.device_node, &zthfc->ddev->spans);
++    if (dahdi_register_device(zthfc->ddev, &zthfc->card->pcidev->dev)) {
+ 	printk(KERN_CRIT "unable to register DAHDI device!\n");
+ 	return -1;
+     }
+--- dahdi-linux-2.6.0/drivers/dahdi/zaphfc.h.orig	2012-01-25 14:23:37.000000000 +0200
++++ dahdi-linux-2.6.0/drivers/dahdi/zaphfc.h	2012-01-25 14:24:33.000000000 +0200
+@@ -339,6 +339,7 @@
+     struct dahdi_span span;
+     struct dahdi_chan chans[3];
+     struct dahdi_chan *_chans[3];
++    struct dahdi_device *ddev;
+     struct hfc_card *card;
+ } dahdi_hfc;
+ 
diff --git a/main/dahdi-linux-vanilla/zaphfc-dahdi-2.7.0.patch b/main/dahdi-linux-vanilla/zaphfc-dahdi-2.7.0.patch
new file mode 100644
index 0000000000..624cfe7b9a
--- /dev/null
+++ b/main/dahdi-linux-vanilla/zaphfc-dahdi-2.7.0.patch
@@ -0,0 +1,32 @@
+--- dahdi-linux-2.7.0/drivers/dahdi/zaphfc.c.orig	2013-11-13 14:47:31.772140792 +0200
++++ dahdi-linux-2.7.0/drivers/dahdi/zaphfc.c	2013-11-13 14:55:20.136270113 +0200
+@@ -687,19 +687,18 @@
+     if (!zthfc->ddev)
+ 	return -ENOMEM;
+ 
+-    zthfc->ddev->manufacturer = "HFC";
+-
++    zthfc->ddev->manufacturer = "Cologne Chips";
++    zthfc->ddev->devicetype = "HFC-S PCI-A ISDN";
++    zthfc->ddev->location = kasprintf(GFP_KERNEL,
++	"PCI Bus %02d Slot %02d",
++	hfctmp->pcidev->bus->number,
++	PCI_SLOT(hfctmp->pcidev->devfn) + 1);
+     memset(&zthfc->span, 0x0, sizeof(struct dahdi_span)); // you never can tell...
+-
+     sprintf(zthfc->span.name, "ZTHFC/%d", hfc_dev_count + 1);
+-    if (hfctmp->regs.nt_mode == 1) {
+-	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT]", hfc_dev_count + 1);
+-    } else {
+-	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE]", hfc_dev_count + 1);
+-    }
+-
++    sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [%s]",
++	hfc_dev_count + 1, hfctmp->regs.nt_mode ? "NT" : "TE");
++    zthfc->span.spantype = hfctmp->regs.nt_mode ? SPANTYPE_DIGITAL_BRI_NT : SPANTYPE_DIGITAL_BRI_TE;
+     zthfc->span.ops = &zaphfc_span_ops;
+-
+     zthfc->span.channels = 3;
+     zthfc->span.chans = zthfc->_chans;
+     for (i = 0; i < zthfc->span.channels; i++)
+
diff --git a/main/dahdi-linux-vanilla/zaphfc-dahdi-flortz.diff b/main/dahdi-linux-vanilla/zaphfc-dahdi-flortz.diff
new file mode 100644
index 0000000000..dc856c97c7
--- /dev/null
+++ b/main/dahdi-linux-vanilla/zaphfc-dahdi-flortz.diff
@@ -0,0 +1,1232 @@
+Index: dahdi-linux-2.1.0.4/drivers/dahdi/zaphfc.h
+===================================================================
+--- dahdi-linux-2.1.0.4.orig/drivers/dahdi/zaphfc.h	2009-03-17 18:13:54.000000000 +0200
++++ dahdi-linux-2.1.0.4/drivers/dahdi/zaphfc.h	2009-03-17 18:14:44.000000000 +0200
+@@ -135,8 +135,12 @@
+ /* bits in HFCD_MST_MODE */
+ #define hfc_MST_MODE_MASTER	     0x01
+ #define hfc_MST_MODE_SLAVE         0x00
++#define hfc_MST_MODE_F0_LONG_DURATION         0x08
+ /* remaining bits are for codecs control */
+ 
++/* bits in HFCD_MST_EMOD */
++#define hfc_MST_EMOD_SLOW_CLOCK_ADJ	0x01
++
+ /* bits in HFCD_SCTRL */
+ #define hfc_SCTRL_B1_ENA	     0x01
+ #define hfc_SCTRL_B2_ENA	     0x02
+@@ -236,6 +240,9 @@
+ #define hfc_BTRANS_THRESHOLD 128
+ #define hfc_BTRANS_THRESMASK 0x00
+ 
++#define hfc_FIFO_MEM_SIZE_BYTES (32*1024)
++#define hfc_FIFO_MEM_SIZE_PAGES ((hfc_FIFO_MEM_SIZE_BYTES+PAGE_SIZE-1)/PAGE_SIZE)
++
+ /* Structures */
+ 
+ typedef struct hfc_regs {
+@@ -249,20 +256,67 @@
+     unsigned char connect;
+     unsigned char trm;
+     unsigned char mst_mode;
++    unsigned char mst_emod;
+     unsigned char bswapped;
+     unsigned char nt_mode;
+     unsigned char int_drec;
+ } hfc_regs;
+ 
++struct bch {
++    int fill_fifo,checkcnt,initialized;
++    struct {
++	u16 z2;
++	struct {
++	    volatile u16 *z1p;
++	    volatile u8 *fifo_base;
++	    int filled;
++	} c[2];
++	int diff;
++    } rx;
++    struct {
++	u16 z1;
++	struct {
++	    volatile u16 *z1p,*z2p;
++	    volatile u8 *fifo_base;
++	    int filled;
++	} c[2];
++	int diff;
++    } tx;
++};
++
++struct dch {
++    struct {
++	struct {
++	    volatile u8 *p;
++	} f1;
++	struct {
++	    u8 v;
++	    struct {
++		u16 v;
++	    } z2;
++	} f2;
++    } rx;
++    struct {
++	struct {
++	    u8 v;
++	    volatile u8 *p;
++	    struct {
++		u16 v;
++	    } z1;
++	} f1;
++	struct {
++	    volatile u8 *p;
++	} f2;
++    } tx;
++};
++
+ typedef struct hfc_card {
+     spinlock_t lock;
+     unsigned int irq;
+     unsigned int iomem;
+     int ticks;		
+-    int clicks;		
+     unsigned char *pci_io;
+-    void *fifomem;		// start of the shared mem
+-    volatile void *fifos;	// 32k aligned mem for the fifos
++    void *fifos;		// 32k aligned mem for the fifos
+     struct hfc_regs regs;
+     unsigned int pcibus;
+     unsigned int pcidevfn;
+@@ -274,6 +328,9 @@
+     unsigned char brecbuf[2][DAHDI_CHUNKSIZE];
+     unsigned char btransbuf[2][DAHDI_CHUNKSIZE];
+     unsigned char cardno;
++    int active;
++    struct bch bch;
++    struct dch dch;
+     struct hfc_card *next;
+ } hfc_card;
+ 
+@@ -285,6 +342,3 @@
+     struct hfc_card *card;
+ } dahdi_hfc;
+ 
+-/* tune this */
+-#define hfc_BCHAN_BUFFER	8
+-#define hfc_MAX_CARDS		8
+Index: dahdi-linux-2.1.0.4/drivers/dahdi/zaphfc.c
+===================================================================
+--- dahdi-linux-2.1.0.4.orig/drivers/dahdi/zaphfc.c	2009-03-17 18:52:47.000000000 +0200
++++ dahdi-linux-2.1.0.4/drivers/dahdi/zaphfc.c	2009-03-17 18:53:43.000000000 +0200
+@@ -7,19 +7,21 @@
+  *
+  * Klaus-Peter Junghanns <kpj@junghanns.net>
+  *
++ * Copyright (C) 2004, 2005, 2006  Florian Zumbiehl <florz@gmx.de>
++ *  - support for slave mode of the HFC-S chip which allows it to
++ *    sync its sample clock to an external source/another HFC chip
++ *  - support for "interrupt bundling" (let only one card generate
++ *    8 kHz timing interrupt no matter how many cards there are
++ *    in the system)
++ *  - interrupt loss tolerant b channel handling
++ *
+  * This program is free software and may be modified and
+- * distributed under the terms of the GNU Public License.
++ * distributed under the terms of the GNU General Public License.
+  *
+  */
+ 
+ #include <linux/kernel.h>
+ #include <linux/module.h>
+-#ifdef RTAITIMING
+-#include <asm/io.h>
+-#include <rtai.h>
+-#include <rtai_sched.h>
+-#include <rtai_fifos.h>
+-#endif
+ #include <linux/pci.h>
+ #include <linux/init.h>
+ #include <linux/interrupt.h>
+@@ -29,6 +31,8 @@
+ 
+ #include <linux/moduleparam.h>
+ 
++#define log2(n) ffz(~(n))
++
+ #if CONFIG_PCI
+ 
+ #define CLKDEL_TE	0x0f	/* CLKDEL in TE mode */
+@@ -70,42 +74,31 @@
+ static struct hfc_card *hfc_dev_list = NULL;
+ static int hfc_dev_count = 0;
+ static int modes = 0; // all TE
++static int sync_slave = 0; // all master
++static int timer_card = 0;
++static int jitterbuffer = 1;
+ static int debug = 0;
+ static struct pci_dev *multi_hfc = NULL;
+ static DEFINE_SPINLOCK(registerlock);
+ 
+-void hfc_shutdownCard(struct hfc_card *hfctmp) {
+-    unsigned long flags;
+-
+-    if (hfctmp == NULL) {
+-	return;
+-    }
+-
+-    if (hfctmp->pci_io == NULL) {
+-	return;
+-    }
+-    
+-    spin_lock_irqsave(&hfctmp->lock,flags);
+-
++void hfc_shutdownCard1(struct hfc_card *hfctmp) {
+     printk(KERN_INFO "zaphfc: shutting down card at %p.\n",hfctmp->pci_io);
+ 
+     /* Clear interrupt mask */
+     hfctmp->regs.int_m2 = 0;
+     hfc_outb(hfctmp, hfc_INT_M2, hfctmp->regs.int_m2);
+ 
+-    /* Reset pending interrupts */
+-    hfc_inb(hfctmp, hfc_INT_S1);
++    /* Remove interrupt handler */
++    free_irq(hfctmp->irq,hfctmp);
++}
++
++void hfc_shutdownCard2(struct hfc_card *hfctmp) {
++    unsigned long flags;
+ 
+-    /* Wait for interrupts that might still be pending */
+-    spin_unlock_irqrestore(&hfctmp->lock, flags);
+-    set_current_state(TASK_UNINTERRUPTIBLE);
+-    schedule_timeout((30 * HZ) / 1000);	// wait 30 ms
+     spin_lock_irqsave(&hfctmp->lock,flags);
+ 
+-    /* Remove interrupt handler */
+-    if (hfctmp->irq) {
+-	free_irq(hfctmp->irq, hfctmp);
+-    }
++    /* Reset pending interrupts */
++    hfc_inb(hfctmp, hfc_INT_S1);
+ 
+     /* Soft-reset the card */
+     hfc_outb(hfctmp, hfc_CIRM, hfc_CIRM_RESET); // softreset on
+@@ -119,8 +112,8 @@
+ 
+     pci_write_config_word(hfctmp->pcidev, PCI_COMMAND, 0);	// disable memio and bustmaster
+ 
+-    if (hfctmp->fifomem != NULL) {
+-        kfree(hfctmp->fifomem);
++    if (hfctmp->fifos != NULL) {
++	free_pages((unsigned long)hfctmp->fifos,log2(hfc_FIFO_MEM_SIZE_PAGES));
+     }
+     iounmap((void *) hfctmp->pci_io);
+     hfctmp->pci_io = NULL;
+@@ -130,11 +123,24 @@
+     spin_unlock_irqrestore(&hfctmp->lock,flags);
+     if (hfctmp->ztdev != NULL) {
+ 	dahdi_unregister(&hfctmp->ztdev->span);
+-	kfree(hfctmp->ztdev);
++	vfree(hfctmp->ztdev);
+ 	printk(KERN_INFO "unregistered from DAHDI.\n");
+     }
+ }
+ 
++void hfc_shutdownCard(struct hfc_card *hfctmp) {
++    if (hfctmp == NULL) {
++	return;
++    }
++
++    if (hfctmp->pci_io == NULL) {
++	return;
++    }
++
++    hfc_shutdownCard1(hfctmp);
++    hfc_shutdownCard2(hfctmp);
++}
++
+ void hfc_resetCard(struct hfc_card *hfctmp) {
+     unsigned long flags;
+ 
+@@ -178,14 +184,14 @@
+     hfctmp->regs.ctmt = hfc_CTMT_TRANSB1 | hfc_CTMT_TRANSB2; // all bchans are transparent , no freaking hdlc
+     hfc_outb(hfctmp, hfc_CTMT, hfctmp->regs.ctmt);
+ 
+-    hfctmp->regs.int_m1 = 0;
++    hfctmp->regs.int_m1=hfc_INTS_L1STATE;
++    if(hfctmp->cardno==timer_card){
++	hfctmp->regs.int_m2=hfc_M2_PROC_TRANS;
++    }else{
++	hfctmp->regs.int_m1|=hfc_INTS_DREC;
++	hfctmp->regs.int_m2=0;
++    }
+     hfc_outb(hfctmp, hfc_INT_M1, hfctmp->regs.int_m1);
+-
+-#ifdef RTAITIMING
+-    hfctmp->regs.int_m2 = 0;
+-#else
+-    hfctmp->regs.int_m2 = hfc_M2_PROC_TRANS;
+-#endif
+     hfc_outb(hfctmp, hfc_INT_M2, hfctmp->regs.int_m2);
+ 
+     /* Clear already pending ints */
+@@ -197,8 +203,8 @@
+ 	hfctmp->regs.sctrl = 3 | hfc_SCTRL_NONE_CAP | hfc_SCTRL_MODE_TE;	/* set tx_lo mode, error in datasheet ! */
+     }
+ 
+-    hfctmp->regs.mst_mode = hfc_MST_MODE_MASTER;	/* HFC Master Mode */
+     hfc_outb(hfctmp, hfc_MST_MODE, hfctmp->regs.mst_mode);
++    hfc_outb(hfctmp, hfc_MST_EMOD, hfctmp->regs.mst_emod);
+ 
+     hfc_outb(hfctmp, hfc_SCTRL, hfctmp->regs.sctrl);
+     hfctmp->regs.sctrl_r = 3;
+@@ -210,10 +216,8 @@
+     hfc_outb(hfctmp, hfc_CIRM, 0x80 | 0x40);	// bit order
+ 
+     /* Finally enable IRQ output */
+-#ifndef RTAITIMING
+     hfctmp->regs.int_m2 |= hfc_M2_IRQ_ENABLE;
+     hfc_outb(hfctmp, hfc_INT_M2, hfctmp->regs.int_m2);
+-#endif
+ 
+     /* clear pending ints */
+     hfc_inb(hfctmp, hfc_INT_S1); 
+@@ -230,368 +234,210 @@
+     spin_unlock(&registerlock);
+ }
+ 
+-static void hfc_btrans(struct hfc_card *hfctmp, char whichB) {
+-    // we are called with irqs disabled from the irq handler
+-    int count, maxlen, total;
+-    unsigned char *f1, *f2;
+-    unsigned short *z1, *z2, newz1;
+-    int freebytes;
+-
+-    if (whichB == 1) {
+-	f1 = (char *)(hfctmp->fifos + hfc_FIFO_B1TX_F1);
+-        f2 = (char *)(hfctmp->fifos + hfc_FIFO_B1TX_F2);
+-	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1TX_Z1 + (*f1 * 4));
+-	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1TX_Z2 + (*f1 * 4));
+-    } else {
+-	f1 = (char *)(hfctmp->fifos + hfc_FIFO_B2TX_F1);
+-        f2 = (char *)(hfctmp->fifos + hfc_FIFO_B2TX_F2);
+-	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2TX_Z1 + (*f1 * 4));
+-	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2TX_Z2 + (*f1 * 4));
+-    }
+-
+-    freebytes = *z2 - *z1;
+-    if (freebytes <= 0) {
+-	freebytes += hfc_B_FIFO_SIZE;
+-    }
+-    count = DAHDI_CHUNKSIZE;
+-
+-    total = count;
+-    if (freebytes < count) {
+-	hfctmp->clicks++;
+-	/* only spit out this warning once per second to not make things worse! */
+-	if (hfctmp->clicks > 100) {
+-	    printk(KERN_CRIT "zaphfc: bchan tx fifo full, dropping audio! (z1=%d, z2=%d)\n",*z1,*z2);
+-	    hfctmp->clicks = 0;
+-	}
+-	return;
+-    }
+-    
+-    maxlen = (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL) - *z1;
+-    if (maxlen > count) {
+-        maxlen = count;
+-    }
+-    newz1 = *z1 + total;
+-    if (newz1 >= (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL)) { newz1 -= hfc_B_FIFO_SIZE; }
++/*===========================================================================*/
+ 
+-	if (whichB == 1) {
+-	    memcpy((char *)(hfctmp->fifos + hfc_FIFO_B1TX_ZOFF + *z1),hfctmp->ztdev->chans[0].writechunk, maxlen);
+-	} else {
+-	    memcpy((char *)(hfctmp->fifos + hfc_FIFO_B2TX_ZOFF + *z1),hfctmp->ztdev->chans[1].writechunk, maxlen);
+-	}
+-	
+-	count -= maxlen;
+-	if (count > 0) {
+-	// Buffer wrap
+-	    if (whichB == 1) {
+-	        memcpy((char *)(hfctmp->fifos + hfc_FIFO_B1TX_ZOFF + hfc_B_SUB_VAL),hfctmp->ztdev->chans[0].writechunk+maxlen, count);
+-	    } else {
+-	        memcpy((char *)(hfctmp->fifos + hfc_FIFO_B2TX_ZOFF + hfc_B_SUB_VAL),hfctmp->ztdev->chans[1].writechunk+maxlen, count);
+-	    }
+-	}
++#if hfc_B_FIFO_SIZE%DAHDI_CHUNKSIZE
++#error hfc_B_FIFO_SIZE is not a multiple of DAHDI_CHUNKSIZE even though the code assumes this
++#endif
++
++static void hfc_dch_init(struct hfc_card *hfctmp){
++    struct dch *chtmp=&hfctmp->dch;
+ 
+-    *z1 = newz1;	/* send it now */
++    chtmp->rx.f1.p=(u8 *)(hfctmp->fifos+hfc_FIFO_DRX_F1);
++    chtmp->rx.f2.v=0x1f;
++    chtmp->rx.f2.z2.v=0x1ff;
+ 
+-//    if (count > 0) printk(KERN_CRIT "zaphfc: bchan tx fifo (f1=%d, f2=%d, z1=%d, z2=%d)\n",(*f1) & hfc_FMASK,(*f2) & hfc_FMASK, *z1, *z2);
+-    return;    
++    chtmp->tx.f1.p=(u8 *)(hfctmp->fifos+hfc_FIFO_DTX_F1);
++    chtmp->tx.f1.v=0x1f;
++    chtmp->tx.f1.z1.v=0x1ff;
++    chtmp->tx.f2.p=(u8 *)(hfctmp->fifos+hfc_FIFO_DTX_F2);
+ }
+ 
+-static void hfc_brec(struct hfc_card *hfctmp, char whichB) {
+-    // we are called with irqs disabled from the irq handler
+-    int count, maxlen, drop;
+-    volatile unsigned char *f1, *f2;
+-    volatile unsigned short *z1, *z2, newz2;
+-    int bytes = 0;
+-
+-    if (whichB == 1) {
+-	f1 = (char *)(hfctmp->fifos + hfc_FIFO_B1RX_F1);
+-        f2 = (char *)(hfctmp->fifos + hfc_FIFO_B1RX_F2);
+-	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1RX_Z1 + (*f1 * 4));
+-	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1RX_Z2 + (*f1 * 4));
+-    } else {
+-	f1 = (char *)(hfctmp->fifos + hfc_FIFO_B2RX_F1);
+-        f2 = (char *)(hfctmp->fifos + hfc_FIFO_B2RX_F2);
+-	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2RX_Z1 + (*f1 * 4));
+-	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2RX_Z2 + (*f1 * 4));
+-    }
++static void hfc_bch_init(struct hfc_card *hfctmp){
++    struct bch *chtmp=&hfctmp->bch;
+ 
+-    bytes = *z1 - *z2;
+-    if (bytes < 0) {
+-	bytes += hfc_B_FIFO_SIZE;
+-    }
+-    count = DAHDI_CHUNKSIZE;
+-    
+-    if (bytes < DAHDI_CHUNKSIZE) {
+-#ifndef RTAITIMING
+-	printk(KERN_CRIT "zaphfc: bchan rx fifo not enough bytes to receive! (z1=%d, z2=%d, wanted %d got %d), probably a buffer overrun.\n",*z1,*z2,DAHDI_CHUNKSIZE,bytes);
+-#endif
+-	return;
+-    }
++    chtmp->checkcnt=0;
++    chtmp->fill_fifo=0;
+ 
+-    /* allowing the buffering of hfc_BCHAN_BUFFER bytes of audio data works around irq jitter */
+-    if (bytes > hfc_BCHAN_BUFFER + DAHDI_CHUNKSIZE) {
+-	/* if the system is too slow to handle it, we will have to drop it all (except 1 DAHDI chunk) */
+-	drop = bytes - DAHDI_CHUNKSIZE;
+-	hfctmp->clicks++;
+-	/* only spit out this warning once per second to not make things worse! */
+-	if (hfctmp->clicks > 100) {
+-	    printk(KERN_CRIT "zaphfc: dropped audio (z1=%d, z2=%d, wanted %d got %d, dropped %d).\n",*z1,*z2,count,bytes,drop);
+-	    hfctmp->clicks = 0;
+-	}
+-	/* hm, we are processing the b chan data tooooo slowly... let's drop the lost audio */
+-	newz2 = *z2 + drop;
+-	if (newz2 >= (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL)) { 
+-	    newz2 -= hfc_B_FIFO_SIZE; 
+-	}
+-	*z2 = newz2;
+-    }
++    chtmp->rx.c[0].z1p=(unsigned short *)(hfctmp->fifos+hfc_FIFO_B1RX_Z1+0x1f*4);
++    chtmp->rx.c[0].fifo_base=(char *)(hfctmp->fifos+hfc_FIFO_B1RX_ZOFF);
++    chtmp->rx.c[1].z1p=(unsigned short *)(hfctmp->fifos+hfc_FIFO_B2RX_Z1+0x1f*4);
++    chtmp->rx.c[1].fifo_base=(char *)(hfctmp->fifos+hfc_FIFO_B2RX_ZOFF);
++    chtmp->rx.z2=hfc_B_SUB_VAL;
++    chtmp->rx.diff=0;
+ 
+-    
+-    maxlen = (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL) - *z2;
+-    if (maxlen > count) {
+-        maxlen = count;
+-    }
+-    if (whichB == 1) {
+-        memcpy(hfctmp->ztdev->chans[0].readchunk,(char *)(hfctmp->fifos + hfc_FIFO_B1RX_ZOFF + *z2), maxlen);
+-    } else {
+-        memcpy(hfctmp->ztdev->chans[1].readchunk,(char *)(hfctmp->fifos + hfc_FIFO_B2RX_ZOFF + *z2), maxlen);
+-    }
+-    newz2 = *z2 + count;
+-    if (newz2 >= (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL)) { 
+-        newz2 -= hfc_B_FIFO_SIZE; 
++    chtmp->tx.c[0].z1p=(unsigned short *)(hfctmp->fifos+hfc_FIFO_B1TX_Z1+0x1f*4);
++    chtmp->tx.c[0].z2p=(unsigned short *)(hfctmp->fifos+hfc_FIFO_B1TX_Z2+0x1f*4);
++    chtmp->tx.c[0].fifo_base=(char *)(hfctmp->fifos+hfc_FIFO_B1TX_ZOFF);
++    chtmp->tx.c[0].filled=0;
++    chtmp->tx.c[1].z1p=(unsigned short *)(hfctmp->fifos+hfc_FIFO_B2TX_Z1+0x1f*4);
++    chtmp->tx.c[1].z2p=(unsigned short *)(hfctmp->fifos+hfc_FIFO_B2TX_Z2+0x1f*4);
++    chtmp->tx.c[1].fifo_base=(char *)(hfctmp->fifos+hfc_FIFO_B2TX_ZOFF);
++    chtmp->tx.c[1].filled=0;
++    chtmp->tx.z1=hfc_B_SUB_VAL;
++    chtmp->tx.diff=0;
++
++    hfc_dch_init(hfctmp);
++
++    chtmp->initialized=0;
++}
++
++static int hfc_bch_check(struct hfc_card *hfctmp){
++    struct bch *chtmp=&hfctmp->bch;
++    int x,r;
++
++    for(x=0;x<2;x++){
++	chtmp->tx.c[x].filled=(chtmp->tx.z1-*chtmp->tx.c[x].z2p+hfc_B_FIFO_SIZE)%hfc_B_FIFO_SIZE;
++	chtmp->rx.c[x].filled=(*chtmp->rx.c[x].z1p-chtmp->rx.z2+hfc_B_FIFO_SIZE)%hfc_B_FIFO_SIZE;
+     }
+-    *z2 = newz2;
+-	
+-    count -= maxlen;
+-    if (count > 0) {
+-    // Buffer wrap
+-        if (whichB == 1) {
+-	    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B1RX_Z2 + (*f1 * 4));
+-    	    memcpy(hfctmp->ztdev->chans[0].readchunk + maxlen,(char *)(hfctmp->fifos + hfc_FIFO_B1RX_ZOFF + hfc_B_SUB_VAL), count);
+-	} else {
+-	    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_B2RX_Z2 + (*f1 * 4));
+-	    memcpy(hfctmp->ztdev->chans[1].readchunk + maxlen,(char *)(hfctmp->fifos + hfc_FIFO_B2RX_ZOFF + hfc_B_SUB_VAL), count);
+-	}
+-	newz2 = *z2 + count;
+-	if (newz2 >= (hfc_B_FIFO_SIZE + hfc_B_SUB_VAL)) { 
+-	    newz2 -= hfc_B_FIFO_SIZE; 
++    if(chtmp->fill_fifo){
++	chtmp->checkcnt++;
++	chtmp->checkcnt%=DAHDI_CHUNKSIZE;
++	r=!chtmp->checkcnt;
++    }else{
++	x=chtmp->tx.c[0].filled-chtmp->tx.c[1].filled;
++	if(abs(x-chtmp->tx.diff)>1){
++	    printk(KERN_CRIT "zaphfc[%d]: tx sync changed: %d, %d\n",hfctmp->cardno,chtmp->tx.c[0].filled,chtmp->tx.c[1].filled);
++	    chtmp->tx.diff=x;
+ 	}
++	r=chtmp->tx.c[0].filled<=DAHDI_CHUNKSIZE*jitterbuffer&&chtmp->tx.c[1].filled<=DAHDI_CHUNKSIZE*jitterbuffer;
+     }
++    return(r);
++}
+ 
++#define hfc_bch_inc_z(a,b) (a)=((a)-hfc_B_SUB_VAL+(b))%hfc_B_FIFO_SIZE+hfc_B_SUB_VAL
+ 
+-    if (whichB == 1) {
+-	dahdi_ec_chunk(&hfctmp->ztdev->chans[0], hfctmp->ztdev->chans[0].readchunk, hfctmp->ztdev->chans[0].writechunk);
+-    } else {
+-	dahdi_ec_chunk(&hfctmp->ztdev->chans[1], hfctmp->ztdev->chans[1].readchunk, hfctmp->ztdev->chans[1].writechunk);
++static void hfc_bch_tx(struct hfc_card *hfctmp){
++    struct bch *chtmp=&hfctmp->bch;
++    int x;
++
++    for(x=0;x<2;x++)
++	memcpy((void *)(chtmp->tx.c[x].fifo_base+chtmp->tx.z1),hfctmp->ztdev->chans[x].writechunk,DAHDI_CHUNKSIZE);
++    hfc_bch_inc_z(chtmp->tx.z1,DAHDI_CHUNKSIZE);
++    if(chtmp->fill_fifo){
++	chtmp->fill_fifo--;
++    }else if(chtmp->tx.c[0].filled<=1||chtmp->tx.c[1].filled<=1){
++	chtmp->fill_fifo=jitterbuffer;
++	if(chtmp->initialized)
++	    printk(KERN_CRIT "zaphfc[%d]: b channel buffer underrun: %d, %d\n",hfctmp->cardno,chtmp->tx.c[0].filled,chtmp->tx.c[1].filled);
+     }
+-    return;    
++    if(!chtmp->fill_fifo)
++	for(x=0;x<2;x++)*chtmp->tx.c[x].z1p=chtmp->tx.z1;
+ }
+ 
+-
+-static void hfc_dtrans(struct hfc_card *hfctmp) {
+-    // we are called with irqs disabled from the irq handler
++static void hfc_bch_rx(struct hfc_card *hfctmp){
++    struct bch *chtmp=&hfctmp->bch;
+     int x;
+-    int count, maxlen, total;
+-    unsigned char *f1, *f2, newf1;
+-    unsigned short *z1, *z2, newz1;
+-    int frames, freebytes;
+ 
+-    if (hfctmp->ztdev->chans[2].bytes2transmit == 0) {
+-	return;
++    x=chtmp->rx.c[0].filled-chtmp->rx.c[1].filled;
++    if(abs(x-chtmp->rx.diff)>1){
++	printk(KERN_CRIT "zaphfc[%d]: rx sync changed: %d, %d\n",hfctmp->cardno,chtmp->rx.c[0].filled,chtmp->rx.c[1].filled);
++	chtmp->rx.diff=x;
+     }
+-
+-    f1 = (char *)(hfctmp->fifos + hfc_FIFO_DTX_F1);
+-    f2 = (char *)(hfctmp->fifos + hfc_FIFO_DTX_F2);
+-    z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DTX_Z1 + (*f1 * 4));
+-    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DTX_Z2 + (*f1 * 4));
+-
+-    frames = (*f1 - *f2) & hfc_FMASK;
+-    if (frames < 0) {
+-	frames += hfc_MAX_DFRAMES + 1;
++    if(chtmp->rx.c[0].filled>=DAHDI_CHUNKSIZE&&chtmp->rx.c[1].filled>=DAHDI_CHUNKSIZE){
++	if((chtmp->rx.c[0].filled>=DAHDI_CHUNKSIZE*(jitterbuffer+2)&&chtmp->rx.c[1].filled>=DAHDI_CHUNKSIZE*(jitterbuffer+2))||!chtmp->initialized){
++	    if(chtmp->initialized)
++		printk(KERN_CRIT "zaphfc[%d]: b channel buffer overflow: %d, %d\n",hfctmp->cardno,chtmp->rx.c[0].filled,chtmp->rx.c[1].filled);
++	    hfc_bch_inc_z(chtmp->rx.z2,chtmp->rx.c[0].filled-chtmp->rx.c[0].filled%DAHDI_CHUNKSIZE-DAHDI_CHUNKSIZE);
++	    chtmp->initialized=1;
++	}
++	for(x=0;x<2;x++){
++	    memcpy(hfctmp->ztdev->chans[x].readchunk,(void *)(chtmp->rx.c[x].fifo_base+chtmp->rx.z2),DAHDI_CHUNKSIZE);
++	    dahdi_ec_chunk(&hfctmp->ztdev->chans[x],hfctmp->ztdev->chans[x].readchunk,hfctmp->ztdev->chans[x].writechunk);
++	}
++	hfc_bch_inc_z(chtmp->rx.z2,DAHDI_CHUNKSIZE);
+     }
++}
+ 
+-    if (frames >= hfc_MAX_DFRAMES) {
+-	printk(KERN_CRIT "zaphfc: dchan tx fifo total number of frames exceeded!\n");
+-	return;
+-    }
++/*===========================================================================*/
+ 
+-    freebytes = *z2 - *z1;
+-    if (freebytes <= 0) {
+-	freebytes += hfc_D_FIFO_SIZE;
+-    }
+-    count = hfctmp->ztdev->chans[2].bytes2transmit;
+-
+-    total = count;
+-    if (freebytes < count) {
+-	printk(KERN_CRIT "zaphfc: dchan tx fifo not enough free bytes! (z1=%d, z2=%d)\n",*z1,*z2);
+-	return;
+-    }
+-    
+-    newz1 = (*z1 + count) & hfc_ZMASK;
+-    newf1 = ((*f1 + 1) & hfc_MAX_DFRAMES) | (hfc_MAX_DFRAMES + 1);	// next frame
+-    
+-    if (count > 0) {
+-	if (debug) {
+-    	    printk(KERN_CRIT "zaphfc: card %d TX [ ", hfctmp->cardno);
+-	    for (x=0; x<count; x++) {
++static void hfc_dch_tx(struct hfc_card *hfctmp){
++    struct dch *chtmp=&hfctmp->dch;
++    u8 tx_f2_v;
++    u16 x;
++
++    if(hfctmp->ztdev->chans[2].bytes2transmit){
++	if(debug){
++	    printk(KERN_CRIT "zaphfc[%d]: card TX [ ",hfctmp->cardno);
++	    for(x=0;x<hfctmp->ztdev->chans[2].bytes2transmit;x++){
+ 		printk("%#2x ",hfctmp->dtransbuf[x]);
+ 	    }
+-	    if (hfctmp->ztdev->chans[2].eoftx == 1) {
+-		printk("] %d bytes\n", count);
+-	    } else {
+-		printk("..] %d bytes\n", count);
+-	    }
+-	}
+-	maxlen = hfc_D_FIFO_SIZE - *z1;
+-	if (maxlen > count) {
+-	    maxlen = count;
++	    printk("] %d bytes\n",hfctmp->ztdev->chans[2].bytes2transmit);
+ 	}
+-	memcpy((char *)(hfctmp->fifos + hfc_FIFO_DTX_ZOFF + *z1),hfctmp->ztdev->chans[2].writechunk, maxlen);
+-	count -= maxlen;
+-	if (count > 0) {
+-	    memcpy((char *)(hfctmp->fifos + hfc_FIFO_DTX_ZOFF),(char *)(hfctmp->ztdev->chans[2].writechunk + maxlen), count);
++	tx_f2_v=*chtmp->tx.f2.p;
++	if(!(tx_f2_v-chtmp->tx.f1.v+hfc_MAX_DFRAMES+1-1)&(hfc_MAX_DFRAMES+1-1)){
++	    printk(KERN_CRIT "zaphfc[%d]: dchan tx fifo total number of frames exceeded!\n",hfctmp->cardno);
++	}else{
++	    if(((*(volatile u16 *)(hfctmp->fifos+hfc_FIFO_DTX_Z2+tx_f2_v*4)-chtmp->tx.f1.z1.v+hfc_D_FIFO_SIZE-1)&(hfc_D_FIFO_SIZE-1))<hfctmp->ztdev->chans[2].bytes2transmit){
++		printk(KERN_CRIT "zaphfc[%d]: dchan tx fifo not enough space for frame!\n",hfctmp->cardno);
++	    }else{
++		chtmp->tx.f1.v=((chtmp->tx.f1.v+1)&hfc_MAX_DFRAMES)|(hfc_MAX_DFRAMES+1);
++		x=min(hfctmp->ztdev->chans[2].bytes2transmit,hfc_D_FIFO_SIZE-chtmp->tx.f1.z1.v);
++		memcpy(hfctmp->fifos+hfc_FIFO_DTX_ZOFF+chtmp->tx.f1.z1.v,hfctmp->ztdev->chans[2].writechunk,x);
++		memcpy(hfctmp->fifos+hfc_FIFO_DTX_ZOFF,hfctmp->ztdev->chans[2].writechunk+x,hfctmp->ztdev->chans[2].bytes2transmit-x);
++		*(volatile u16 *)(hfctmp->fifos+hfc_FIFO_DTX_Z2+chtmp->tx.f1.v*4)=chtmp->tx.f1.z1.v;
++		chtmp->tx.f1.z1.v=(chtmp->tx.f1.z1.v+hfctmp->ztdev->chans[2].bytes2transmit+hfc_D_FIFO_SIZE)&(hfc_D_FIFO_SIZE-1);
++		*(volatile u16 *)(hfctmp->fifos+hfc_FIFO_DTX_Z1+chtmp->tx.f1.v*4)=chtmp->tx.f1.z1.v;
++		*chtmp->tx.f1.p=chtmp->tx.f1.v;
++	    }
+ 	}
+     }
+-
+-    *z1 = newz1;
+-
+-    if (hfctmp->ztdev->chans[2].eoftx == 1) {
+-	*f1 = newf1;
+-	z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DTX_Z1 + (*f1 * 4));
+-	*z1 = newz1;
+-	hfctmp->ztdev->chans[2].eoftx = 0;
+-    }
+-//    printk(KERN_CRIT "zaphfc: dchan tx fifo (f1=%d, f2=%d, z1=%d, z2=%d)\n",(*f1) & hfc_FMASK,(*f2) & hfc_FMASK, *z1, *z2);
+-    return;    
+ }
+ 
+-/* receive a complete hdlc frame, skip broken or short frames */
+-static void hfc_drec(struct hfc_card *hfctmp) {
+-    int count=0, maxlen=0, framelen=0;
+-    unsigned char *f1, *f2, *crcstat;
+-    unsigned short *z1, *z2, oldz2, newz2;
++static void hfc_dch_rx(struct hfc_card *hfctmp){
++    struct dch *chtmp=&hfctmp->dch;
++    u16 size;
+ 
+     hfctmp->ztdev->chans[2].bytes2receive=0;
+-    hfctmp->ztdev->chans[2].eofrx = 0;
+-
+-    /* put the received data into the DAHDI buffer
+-       we'll call dahdi_receive() later when the timer fires. */
+-    f1 = (char *)(hfctmp->fifos + hfc_FIFO_DRX_F1);
+-    f2 = (char *)(hfctmp->fifos + hfc_FIFO_DRX_F2);
+-
+-    if (*f1 == *f2) return; /* nothing received, strange eh? */
+-
+-    z1 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DRX_Z1 + (*f2 * 4));
+-    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DRX_Z2 + (*f2 * 4));
+-    
+-    /* calculate length of frame, including 2 bytes CRC and 1 byte STAT */
+-    count = *z1 - *z2;
+-    
+-    if (count < 0) { 
+-	count += hfc_D_FIFO_SIZE; /* ring buffer wrapped */
+-    }
+-    count++;
+-    framelen = count;
+-
+-    crcstat = (char *)(hfctmp->fifos + hfc_FIFO_DRX_ZOFF + *z1);
+-
+-    if ((framelen < 4) || (*crcstat != 0x0)) {
+-	/* the frame is too short for a valid HDLC frame or the CRC is borked */
+-	printk(KERN_CRIT "zaphfc: empty HDLC frame or bad CRC received (framelen = %d, stat = %#x, card = %d).\n", framelen, *crcstat, hfctmp->cardno);
+-	oldz2 = *z2;
+-	*f2 = ((*f2 + 1) & hfc_MAX_DFRAMES) | (hfc_MAX_DFRAMES + 1);	/* NEXT!!! */
+-        // recalculate z2, because Z2 is a function of F2 Z2(F2) and we INCed F2!!!
+-	z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DRX_Z2 + (*f2 * 4));
+-	*z2 = (oldz2 + framelen) & hfc_ZMASK;
+-	hfctmp->drecinframe = 0;
+-	hfctmp->regs.int_drec--;
+-	/* skip short or broken frames */
+-        hfctmp->ztdev->chans[2].bytes2receive = 0; 
+-	return;
+-    }
+-
+-    count -= 1;	/* strip STAT */
+-    hfctmp->ztdev->chans[2].eofrx = 1;
+-
+-    if (count + *z2 <= hfc_D_FIFO_SIZE) {
+-	maxlen = count;
+-    } else {
+-	maxlen = hfc_D_FIFO_SIZE - *z2;
++    hfctmp->ztdev->chans[2].eofrx=0;
++    if(*chtmp->rx.f1.p==chtmp->rx.f2.v){
++	hfctmp->regs.int_drec=0;
++    }else{
++	size=((*(volatile u16 *)(hfctmp->fifos+hfc_FIFO_DRX_Z1+chtmp->rx.f2.v*4)-chtmp->rx.f2.z2.v+hfc_D_FIFO_SIZE)&(hfc_D_FIFO_SIZE-1))+1;
++	if(size<4){
++	    printk(KERN_CRIT "zaphfc[%d]: empty HDLC frame received.\n",hfctmp->cardno);
++	}else{
++	    u16 x=min(size,(u16)(hfc_D_FIFO_SIZE-chtmp->rx.f2.z2.v));
++	    memcpy(hfctmp->drecbuf,hfctmp->fifos+hfc_FIFO_DRX_ZOFF+chtmp->rx.f2.z2.v,x);
++	    memcpy(hfctmp->drecbuf+x,hfctmp->fifos+hfc_FIFO_DRX_ZOFF,size-x);
++	    if(hfctmp->drecbuf[size-1]){
++		printk(KERN_CRIT "zaphfc[%d]: received d channel frame with bad CRC.\n",hfctmp->cardno);
++	    }else{
++		hfctmp->ztdev->chans[2].bytes2receive=size-1;
++		hfctmp->ztdev->chans[2].eofrx=1;
++	    }
++	}
++	chtmp->rx.f2.z2.v=(chtmp->rx.f2.z2.v+size)&(hfc_D_FIFO_SIZE-1);
++	chtmp->rx.f2.v=((chtmp->rx.f2.v+1)&hfc_MAX_DFRAMES)|(hfc_MAX_DFRAMES+1);
+     }
+-
+-    /* copy first part */
+-    memcpy(hfctmp->drecbuf, (char *)(hfctmp->fifos + hfc_FIFO_DRX_ZOFF + *z2), maxlen);
+-    hfctmp->ztdev->chans[2].bytes2receive += maxlen; 
+-    
+-    count -= maxlen;
+-    if (count > 0) {
+-	/* ring buffer wrapped, copy rest from start of d fifo */
+-	memcpy(hfctmp->drecbuf + maxlen, (char *)(hfctmp->fifos + hfc_FIFO_DRX_ZOFF), count);
+-	hfctmp->ztdev->chans[2].bytes2receive += count; 
+-    }
+-
+-    /* frame read */
+-    oldz2 = *z2;
+-    newz2 = (oldz2 + framelen) & hfc_ZMASK;
+-    *f2 = ((*f2 + 1) & hfc_MAX_DFRAMES) | (hfc_MAX_DFRAMES + 1);	/* NEXT!!! */
+-    /* recalculate z2, because Z2 is a function of F2 Z2(F2) and we INCed F2!!! */
+-    z2 = (unsigned short *)(hfctmp->fifos + hfc_FIFO_DRX_Z2 + (*f2 * 4));
+-    *z2 = newz2;
+-    hfctmp->drecinframe = 0;
+-    hfctmp->regs.int_drec--; 
+ }
+ 
+-#ifndef RTAITIMING
+ DAHDI_IRQ_HANDLER(hfc_interrupt) {
+     struct hfc_card *hfctmp = dev_id;
+-    unsigned long flags = 0;
+-    unsigned char stat;
+-#else
+-static void hfc_service(struct hfc_card *hfctmp) {
+-#endif
++    struct hfc_card *hfctmp2;
+     struct dahdi_hfc *zthfc;
+-    unsigned char s1, s2, l1state;
++    unsigned char stat, s1, s2, l1state;
++    unsigned long flags = 0;
++    unsigned long flags2 = 0;
+     int x;
+ 
+     if (!hfctmp) {
+-#ifndef RTAITIMING
+-		return IRQ_NONE;
+-#else
+-	/* rtai */
+-	return;
+-#endif
++	    return IRQ_NONE;
+     }
+ 
+     if (!hfctmp->pci_io) {
+ 	    printk(KERN_WARNING "%s: IO-mem disabled, cannot handle interrupt\n",
+ 		   __FUNCTION__);
+-#ifndef RTAITIMING
+ 	    return IRQ_NONE;
+-#else
+-	/* rtai */
+-	return;
+-#endif
+     }
+     
+-    /*	we assume a few things in this irq handler:
+-	- the hfc-pci will only generate "timer" irqs (proc/non-proc)
+-	- we need to use every 8th IRQ (to generate 1khz timing)
+-	OR
+-	- if we use rtai for timing the hfc-pci will not generate ANY irq,
+-	  instead rtai will call this "fake" irq with a 1khz realtime timer. :)
+-	- rtai will directly service the card, not like it used to by triggering
+-	  the linux irq
+-    */
+-
+-#ifndef RTAITIMING
+     spin_lock_irqsave(&hfctmp->lock, flags);
+     stat = hfc_inb(hfctmp, hfc_STATUS);
+-
+     if ((stat & hfc_STATUS_ANYINT) == 0) {
+         // maybe we are sharing the irq
+ 	spin_unlock_irqrestore(&hfctmp->lock,flags);
+ 	return IRQ_NONE;
+     }
+-#endif
+ 
+     s1 = hfc_inb(hfctmp, hfc_INT_S1);
+     s2 = hfc_inb(hfctmp, hfc_INT_S2); 
+@@ -611,18 +457,10 @@
+ 		}
+ 		switch (l1state) {
+ 		    case 3:
+-#ifdef RTAITIMING
+-			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] layer 1 ACTIVATED (G%d) [realtime]", hfctmp->cardno, l1state);
+-#else
+ 			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] layer 1 ACTIVATED (G%d)", hfctmp->cardno, l1state);
+-#endif
+ 			break;
+ 		    default:
+-#ifdef RTAITIMING
+-			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] layer 1 DEACTIVATED (G%d) [realtime]", hfctmp->cardno, l1state);
+-#else
+ 			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] layer 1 DEACTIVATED (G%d)", hfctmp->cardno, l1state);
+-#endif
+ 		}
+ 		if (l1state == 2) {
+ 		    hfc_outb(hfctmp, hfc_STATES, hfc_STATES_ACTIVATE | hfc_STATES_DO_ACTION | hfc_STATES_NT_G2_G3);
+@@ -636,18 +474,10 @@
+ 		}
+ 		switch (l1state) {
+ 		    case 7:
+-#ifdef RTAITIMING
+-			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] layer 1 ACTIVATED (F%d) [realtime]", hfctmp->cardno, l1state);
+-#else
+ 			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] layer 1 ACTIVATED (F%d)", hfctmp->cardno, l1state);
+-#endif
+ 			break;
+ 		    default:
+-#ifdef RTAITIMING
+-			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] layer 1 DEACTIVATED (F%d) [realtime]", hfctmp->cardno, l1state);
+-#else
+ 			sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] layer 1 DEACTIVATED (F%d)", hfctmp->cardno, l1state);
+-#endif
+ 		}
+ 		if (l1state == 3) {
+ 		    hfc_outb(hfctmp, hfc_STATES, hfc_STATES_DO_ACTION | hfc_STATES_ACTIVATE);
+@@ -657,7 +487,7 @@
+ 	}
+ 	if (s1 & hfc_INTS_DREC) {
+ 	    // D chan RX (bit 5)
+-	    hfctmp->regs.int_drec++;
++	    hfctmp->regs.int_drec = 1;
+ 	    // mr. zapata there is something for you!
+ 	//    printk(KERN_CRIT "d chan rx\n");		    
+ 	}
+@@ -678,14 +508,10 @@
+ 	    // B1 chan TX (bit 0)
+ 	}
+     }
+-#ifdef RTAITIMING
+-    /* fake an irq */
+-    s2 |= hfc_M2_PROC_TRANS;
+-#endif
+     if (s2 != 0) {
+ 	if (s2 & hfc_M2_PMESEL) {
+ 	    // kaboom irq (bit 7)
+-	    printk(KERN_CRIT "zaphfc: sync lost, pci performance too low. you might have some cpu throtteling enabled.\n");
++	    //printk(KERN_CRIT "zaphfc: sync lost, pci performance too low. you might have some cpu throtteling enabled.\n");
+ 	}
+ 	if (s2 & hfc_M2_GCI_MON_REC) {
+ 	    // RxR monitor channel (bit 2)
+@@ -693,32 +519,31 @@
+ 	if (s2 & hfc_M2_GCI_I_CHG) {
+ 	    // GCI I-change  (bit 1)
+ 	}
+-	if (s2 & hfc_M2_PROC_TRANS) {
++	if((s2&hfc_M2_PROC_TRANS)&&(hfctmp->cardno==timer_card)){
+ 	    // processing/non-processing transition  (bit 0)
+-	    hfctmp->ticks++;
+-#ifndef RTAITIMING
+-	    if (hfctmp->ticks > 7) {
+-		// welcome to DAHDI timing :)
+-#endif
+-	    	hfctmp->ticks = 0;
+-
+-		if (hfctmp->ztdev->span.flags & DAHDI_FLAG_RUNNING) {
++	hfctmp2=hfctmp;
++	hfctmp=hfc_dev_list;
++	while(hfctmp){
++	    if(hfctmp->active){
++	    if(hfctmp!=hfctmp2)spin_lock_irqsave(&hfctmp->lock, flags2);
++	    if(hfc_bch_check(hfctmp)){
++    if (hfctmp->ztdev->span.flags & DAHDI_FLAG_RUNNING) {
+ 		    // clear dchan buffer
++	//	    memset(hfctmp->drecbuf, 0x0, sizeof(hfctmp->drecbuf));
++
+ 		    hfctmp->ztdev->chans[2].bytes2transmit = 0;
+ 		    hfctmp->ztdev->chans[2].maxbytes2transmit = hfc_D_FIFO_SIZE;
+ 
+ 		    dahdi_transmit(&(hfctmp->ztdev->span));
+ 
+-		    hfc_btrans(hfctmp,1);
+-		    hfc_btrans(hfctmp,2);
+-		    hfc_dtrans(hfctmp);
++		    hfc_bch_tx(hfctmp);
++		    hfc_dch_tx(hfctmp);
+ 		}
+ 
+-		hfc_brec(hfctmp,1);
+-		hfc_brec(hfctmp,2);
+-		if (hfctmp->regs.int_drec > 0) {
++		hfc_bch_rx(hfctmp);
++		if (hfctmp->regs.int_drec) {
+ 		    // dchan data to read
+-		    hfc_drec(hfctmp);
++		    hfc_dch_rx(hfctmp);
+ 		    if (hfctmp->ztdev->chans[2].bytes2receive > 0) {
+ 			    if (debug) {
+     				printk(KERN_CRIT "zaphfc: card %d RX [ ", hfctmp->cardno);
+@@ -743,17 +568,16 @@
+ 		if (hfctmp->ztdev->span.flags & DAHDI_FLAG_RUNNING) {
+ 		    dahdi_receive(&(hfctmp->ztdev->span));
+ 		}
+-		
+-#ifndef RTAITIMING
+ 	    }
+-#endif
++	    if(hfctmp!=hfctmp2)spin_unlock_irqrestore(&hfctmp->lock,flags2);
++	    }
++	    hfctmp=hfctmp->next;
++	}
++	hfctmp=hfctmp2;
+ 	}
+-
+     }
+-#ifndef RTAITIMING
+     spin_unlock_irqrestore(&hfctmp->lock,flags);
+-	return IRQ_RETVAL(1);
+-#endif
++    return IRQ_RETVAL(1);
+ }
+ 
+ 
+@@ -802,22 +626,22 @@
+     }
+     alreadyrunning = span->flags & DAHDI_FLAG_RUNNING;
+     
+-    if (!alreadyrunning) {
+-	span->chans[2]->flags &= ~DAHDI_FLAG_HDLC;
+-	span->chans[2]->flags |= DAHDI_FLAG_BRIDCHAN;
+-	
+-	span->flags |= DAHDI_FLAG_RUNNING;
++    if (alreadyrunning) return 0;
+ 
+-	hfctmp->ticks = -2;
+-	hfctmp->clicks = 0;
+-	hfctmp->regs.fifo_en = hfc_FIFOEN_D | hfc_FIFOEN_B1 | hfc_FIFOEN_B2;
+-        hfc_outb(hfctmp, hfc_FIFO_EN, hfctmp->regs.fifo_en);
+-    } else {
+-	return 0;
+-    }
++    span->chans[2]->flags &= ~DAHDI_FLAG_HDLC;
++    span->chans[2]->flags |= DAHDI_FLAG_BRIDCHAN;
++
++    span->flags |= DAHDI_FLAG_RUNNING;
++
++    hfctmp->ticks = -2;
++    hfctmp->regs.fifo_en = hfc_FIFOEN_D | hfc_FIFOEN_B1 | hfc_FIFOEN_B2;
++    hfc_outb(hfctmp, hfc_FIFO_EN, hfctmp->regs.fifo_en);
++
++    hfc_bch_init(hfctmp);
+ 
+     // drivers, start engines!
+     hfc_outb(hfctmp, hfc_STATES, hfc_STATES_DO_ACTION | hfc_STATES_ACTIVATE);
++    hfctmp->active=1;
+     return 0;
+ }
+ 
+@@ -847,17 +671,9 @@
+ 
+     sprintf(zthfc->span.name, "ZTHFC%d", hfc_dev_count + 1);
+     if (hfctmp->regs.nt_mode == 1) {
+-#ifdef RTAITIMING
+-	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT] [realtime]", hfc_dev_count + 1);
+-#else
+ 	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [NT]", hfc_dev_count + 1);
+-#endif
+     } else {
+-#ifdef RTAITIMING
+-	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE] [realtime]", hfc_dev_count + 1);
+-#else
+ 	sprintf(zthfc->span.desc, "HFC-S PCI A ISDN card %d [TE]", hfc_dev_count + 1);
+-#endif
+     }
+ 
+     zthfc->span.spanconfig = zthfc_spanconfig;
+@@ -897,32 +713,6 @@
+     return 0;
+ }
+ 
+-#ifdef RTAITIMING
+-#define TICK_PERIOD  1000000
+-#define TICK_PERIOD2 1000000000
+-#define TASK_PRIORITY 1
+-#define STACK_SIZE 10000
+-
+-static RT_TASK rt_task;
+-static struct hfc_card *rtai_hfc_list[hfc_MAX_CARDS];
+-static unsigned char rtai_hfc_counter = 0;
+-
+-static void rtai_register_hfc(struct hfc_card *hfctmp) {
+-    rtai_hfc_list[rtai_hfc_counter++] = hfctmp;
+-}
+-
+-static void rtai_loop(int t) {
+-    int i=0;
+-    for (;;) {
+-	for (i=0; i < rtai_hfc_counter; i++) {
+-	    if (rtai_hfc_list[i] != NULL)
+-		hfc_service(rtai_hfc_list[i]);
+-	}
+-        rt_task_wait_period();
+-    }
+-}
+-#endif
+-
+ int hfc_findCards(int pcivendor, int pcidevice, char *vendor_name, char *card_name) {
+     struct pci_dev *tmp;
+     struct hfc_card *hfctmp = NULL;
+@@ -938,9 +728,9 @@
+ 	}
+ 	pci_set_master(tmp);
+ 
+-	hfctmp = kmalloc(sizeof(struct hfc_card), GFP_KERNEL);
++	hfctmp = vmalloc(sizeof(struct hfc_card));
+ 	if (!hfctmp) {
+-	    printk(KERN_WARNING "zaphfc: unable to kmalloc!\n");
++	    printk(KERN_WARNING "zaphfc: unable to vmalloc!\n");
+ 	    pci_disable_device(tmp);
+ 	    multi_hfc = NULL;
+ 	    return -ENOMEM;
+@@ -948,6 +738,7 @@
+ 	memset(hfctmp, 0x0, sizeof(struct hfc_card));
+ 	spin_lock_init(&hfctmp->lock);
+ 	
++	hfctmp->active=0;
+ 	hfctmp->pcidev = tmp;
+ 	hfctmp->pcibus = tmp->bus->number;
+ 	hfctmp->pcidevfn = tmp->devfn; 
+@@ -961,49 +752,39 @@
+ 	hfctmp->pci_io = (char *) tmp->resource[1].start;
+ 	if (!hfctmp->pci_io) {
+ 	    printk(KERN_WARNING "zaphfc: no iomem!\n");
+-	    kfree(hfctmp);
++	    vfree(hfctmp);
+ 	    pci_disable_device(tmp);
+ 	    multi_hfc = NULL;
+ 	    return -1;
+ 	}
+-	
+-	hfctmp->fifomem = kmalloc(65536, GFP_KERNEL);
+-	if (!hfctmp->fifomem) {
+-	    printk(KERN_WARNING "zaphfc: unable to kmalloc fifomem!\n");
+-	    kfree(hfctmp);
++
++	hfctmp->fifos=(void *)__get_free_pages(GFP_KERNEL,log2(hfc_FIFO_MEM_SIZE_PAGES));
++	if (!hfctmp->fifos) {
++	    printk(KERN_WARNING "zaphfc: unable to __get_free_pages fifomem!\n");
++	    vfree(hfctmp);
+ 	    pci_disable_device(tmp);
+ 	    multi_hfc = NULL;
+ 	    return -ENOMEM;
+ 	} else {
+-	    memset(hfctmp->fifomem, 0x0, 65536);
+-	    hfctmp->fifos = (void *)(((ulong) hfctmp->fifomem) & ~0x7FFF) + 0x8000;
+ 	    pci_write_config_dword(hfctmp->pcidev, 0x80, (u_int) virt_to_bus(hfctmp->fifos));
+ 	    hfctmp->pci_io = ioremap((ulong) hfctmp->pci_io, 256);
+ 	}
+ 
+-#ifdef RTAITIMING
+-	/* we need no stinking irq */
+-	hfctmp->irq = 0;
+-#else
+ 	if (request_irq(hfctmp->irq, &hfc_interrupt, IRQF_SHARED, "zaphfc", hfctmp)) {
+ 	    printk(KERN_WARNING "zaphfc: unable to register irq\n");
+-	    kfree(hfctmp->fifomem);
+-	    kfree(hfctmp);
++	    free_pages((unsigned long)hfctmp->fifos,log2(hfc_FIFO_MEM_SIZE_PAGES));
++	    vfree(hfctmp);
+ 	    iounmap((void *) hfctmp->pci_io);
+ 	    pci_disable_device(tmp);
+ 	    multi_hfc = NULL;
+ 	    return -EIO;
+ 	}
+-#endif
+ 
+-#ifdef RTAITIMING
+-	rtai_register_hfc(hfctmp);
+-#endif
+ 	printk(KERN_INFO
+-		       "zaphfc: %s %s configured at mem %lx fifo %lx(%#x) IRQ %d HZ %d\n",
++		       "zaphfc: %s %s configured at mem %#x fifo %#x(%#x) IRQ %d HZ %d\n",
+ 			vendor_name, card_name,
+-		       (unsigned long) hfctmp->pci_io,
+-		       (unsigned long) hfctmp->fifos,
++		       (u_int) hfctmp->pci_io,
++		       (u_int) hfctmp->fifos,
+ 		       (u_int) virt_to_bus(hfctmp->fifos),
+ 		       hfctmp->irq, HZ); 
+ 	pci_write_config_word(hfctmp->pcidev, PCI_COMMAND, PCI_COMMAND_MEMORY);	// enable memio
+@@ -1020,11 +801,21 @@
+ 	    hfctmp->regs.nt_mode = 0;
+ 	}
+ 
+-	zthfc = kmalloc(sizeof(struct dahdi_hfc),GFP_KERNEL);
++	if(sync_slave&(1<<hfc_dev_count)){
++	    printk(KERN_INFO "zaphfc: Card %d configured for slave mode\n",hfc_dev_count);
++	    hfctmp->regs.mst_mode=hfc_MST_MODE_SLAVE|hfc_MST_MODE_F0_LONG_DURATION;
++	    hfctmp->regs.mst_emod=hfc_MST_EMOD_SLOW_CLOCK_ADJ;
++	}else{
++	    printk(KERN_INFO "zaphfc: Card %d configured for master mode\n",hfc_dev_count);
++	    hfctmp->regs.mst_mode=hfc_MST_MODE_MASTER|hfc_MST_MODE_F0_LONG_DURATION;
++	    hfctmp->regs.mst_emod=0;
++	}
++
++	zthfc = vmalloc(sizeof(struct dahdi_hfc));
+ 	if (!zthfc) {
+-	    printk(KERN_CRIT "zaphfc: unable to kmalloc!\n");
++	    printk(KERN_CRIT "zaphfc: unable to vmalloc!\n");
+ 	    hfc_shutdownCard(hfctmp);
+-	    kfree(hfctmp);
++	    vfree(hfctmp);
+ 	    multi_hfc = NULL;
+ 	    return -ENOMEM;
+ 	}
+@@ -1050,7 +841,6 @@
+ 	memset(hfctmp->btransbuf[1], 0x0, sizeof(hfctmp->btransbuf[1]));
+ 	hfctmp->ztdev->chans[1].writechunk = hfctmp->btransbuf[1];
+ 
+-
+ 	hfc_registerCard(hfctmp);
+ 	hfc_resetCard(hfctmp);
+ 	tmp = pci_get_device(pcivendor, pcidevice, multi_hfc);
+@@ -1058,58 +848,42 @@
+     return 0;
+ }
+ 
+-
+-
+ int init_module(void) {
+     int i = 0;
+-#ifdef RTAITIMING
+-    RTIME tick_period;
+-    for (i=0; i < hfc_MAX_CARDS; i++) {
+-	rtai_hfc_list[i] = NULL;
++    if(jitterbuffer<1){
++	printk(KERN_INFO "zaphfc: invalid jitterbuffer size specified: %d - changing to minimum of 1\n",jitterbuffer);
++	jitterbuffer=1;
++    }else if(jitterbuffer>500){
++	printk(KERN_INFO "zaphfc: invalid jitterbuffer size specified: %d - changing to maximum of 500\n",jitterbuffer);
++	jitterbuffer=500;
+     }
+-    rt_set_periodic_mode();
+-#endif
+-    i = 0;
++    printk(KERN_INFO "zaphfc: jitterbuffer size: %d\n",jitterbuffer);
+     while (id_list[i].vendor_id) {
+ 	multi_hfc = NULL;
+ 	hfc_findCards(id_list[i].vendor_id, id_list[i].device_id, id_list[i].vendor_name, id_list[i].card_name);
+ 	i++;
+     }
+-#ifdef RTAITIMING
+-    for (i=0; i < hfc_MAX_CARDS; i++) {
+-        if (rtai_hfc_list[i]) {
+-	    printk(KERN_INFO
+-		       "zaphfc: configured %d at mem %#x fifo %#x(%#x) for realtime servicing\n",
+-			rtai_hfc_list[i]->cardno,
+-		       (u_int) rtai_hfc_list[i]->pci_io,
+-		       (u_int) rtai_hfc_list[i]->fifos,
+-		       (u_int) virt_to_bus(rtai_hfc_list[i]->fifos));
+-
+-	}
+-    }
+-    rt_task_init(&rt_task, rtai_loop, 1, STACK_SIZE, TASK_PRIORITY, 0, 0);
+-    tick_period = start_rt_timer(nano2count(TICK_PERIOD));
+-    rt_task_make_periodic(&rt_task, rt_get_time() + tick_period, tick_period);
+-#endif
+     printk(KERN_INFO "zaphfc: %d hfc-pci card(s) in this box.\n", hfc_dev_count);
+     return 0;
+ }
+ 
+ void cleanup_module(void) {
+     struct hfc_card *tmpcard;
+-#ifdef RTAITIMING
+-    stop_rt_timer();
+-    rt_task_delete(&rt_task);
+-#endif
++
+     printk(KERN_INFO "zaphfc: stop\n");
+ //    spin_lock(&registerlock);
++    tmpcard=hfc_dev_list;
++    while(tmpcard){
++	hfc_shutdownCard1(tmpcard);
++	tmpcard=tmpcard->next;
++    }
+     while (hfc_dev_list != NULL) {
+ 	if (hfc_dev_list == NULL) break;
+-	hfc_shutdownCard(hfc_dev_list);
++	hfc_shutdownCard2(hfc_dev_list);
+ 	tmpcard = hfc_dev_list;
+ 	hfc_dev_list = hfc_dev_list->next;
+ 	if (tmpcard != NULL) {
+-	    kfree(tmpcard);
++	    vfree(tmpcard);
+ 	    tmpcard = NULL;
+ 	    printk(KERN_INFO "zaphfc: freed one card.\n");
+ 	}
+@@ -1119,8 +893,11 @@
+ #endif
+ 
+ 
+-module_param(modes, int, 0600);
++module_param(modes, int, 0400);
+ module_param(debug, int, 0600);
++module_param(sync_slave, int, 0400);
++module_param(timer_card, int, 0400);
++module_param(jitterbuffer, int, 0400);
+ 
+ MODULE_DESCRIPTION("HFC-S PCI A Zaptel Driver");
+ MODULE_AUTHOR("Klaus-Peter Junghanns <kpj@junghanns.net>");