Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 780 insertions, 0 deletions

diff --git a/kernel/drivers/isdn/hisax/st5481_d.c b/kernel/drivers/isdn/hisax/st5481_d.c
new file mode 100644
index 000000000..e88c5c71f
--- /dev/null
+++ b/kernel/drivers/isdn/hisax/st5481_d.c
@@ -0,0 +1,780 @@
+/*
+ * Driver for ST5481 USB ISDN modem
+ *
+ * Author       Frode Isaksen
+ * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
+ *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.de>
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/gfp.h>
+#include <linux/usb.h>
+#include <linux/netdevice.h>
+#include "st5481.h"
+
+static void ph_connect(struct st5481_adapter *adapter);
+static void ph_disconnect(struct st5481_adapter *adapter);
+
+static struct Fsm l1fsm;
+
+static char *strL1State[] =
+{
+	"ST_L1_F3",
+	"ST_L1_F4",
+	"ST_L1_F6",
+	"ST_L1_F7",
+	"ST_L1_F8",
+};
+
+static char *strL1Event[] =
+{
+	"EV_IND_DP",
+	"EV_IND_1",
+	"EV_IND_2",
+	"EV_IND_3",
+	"EV_IND_RSY",
+	"EV_IND_5",
+	"EV_IND_6",
+	"EV_IND_7",
+	"EV_IND_AP",
+	"EV_IND_9",
+	"EV_IND_10",
+	"EV_IND_11",
+	"EV_IND_AI8",
+	"EV_IND_AI10",
+	"EV_IND_AIL",
+	"EV_IND_DI",
+	"EV_PH_ACTIVATE_REQ",
+	"EV_PH_DEACTIVATE_REQ",
+	"EV_TIMER3",
+};
+
+static inline void D_L1L2(struct st5481_adapter *adapter, int pr, void *arg)
+{
+	struct hisax_if *ifc = (struct hisax_if *) &adapter->hisax_d_if;
+
+	ifc->l1l2(ifc, pr, arg);
+}
+
+static void
+l1_go_f3(struct FsmInst *fi, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fi->userdata;
+
+	if (fi->state == ST_L1_F7)
+		ph_disconnect(adapter);
+
+	FsmChangeState(fi, ST_L1_F3);
+	D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL);
+}
+
+static void
+l1_go_f6(struct FsmInst *fi, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fi->userdata;
+
+	if (fi->state == ST_L1_F7)
+		ph_disconnect(adapter);
+
+	FsmChangeState(fi, ST_L1_F6);
+}
+
+static void
+l1_go_f7(struct FsmInst *fi, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fi->userdata;
+
+	FsmDelTimer(&adapter->timer, 0);
+	ph_connect(adapter);
+	FsmChangeState(fi, ST_L1_F7);
+	D_L1L2(adapter, PH_ACTIVATE | INDICATION, NULL);
+}
+
+static void
+l1_go_f8(struct FsmInst *fi, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fi->userdata;
+
+	if (fi->state == ST_L1_F7)
+		ph_disconnect(adapter);
+
+	FsmChangeState(fi, ST_L1_F8);
+}
+
+static void
+l1_timer3(struct FsmInst *fi, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fi->userdata;
+
+	st5481_ph_command(adapter, ST5481_CMD_DR);
+	FsmChangeState(fi, ST_L1_F3);
+	D_L1L2(adapter, PH_DEACTIVATE | INDICATION, NULL);
+}
+
+static void
+l1_ignore(struct FsmInst *fi, int event, void *arg)
+{
+}
+
+static void
+l1_activate(struct FsmInst *fi, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fi->userdata;
+
+	st5481_ph_command(adapter, ST5481_CMD_DR);
+	st5481_ph_command(adapter, ST5481_CMD_PUP);
+	FsmRestartTimer(&adapter->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2);
+	st5481_ph_command(adapter, ST5481_CMD_AR8);
+	FsmChangeState(fi, ST_L1_F4);
+}
+
+static struct FsmNode L1FnList[] __initdata =
+{
+	{ST_L1_F3, EV_IND_DP,            l1_ignore},
+	{ST_L1_F3, EV_IND_AP,            l1_go_f6},
+	{ST_L1_F3, EV_IND_AI8,           l1_go_f7},
+	{ST_L1_F3, EV_IND_AI10,          l1_go_f7},
+	{ST_L1_F3, EV_PH_ACTIVATE_REQ,   l1_activate},
+
+	{ST_L1_F4, EV_TIMER3,            l1_timer3},
+	{ST_L1_F4, EV_IND_DP,            l1_go_f3},
+	{ST_L1_F4, EV_IND_AP,            l1_go_f6},
+	{ST_L1_F4, EV_IND_AI8,           l1_go_f7},
+	{ST_L1_F4, EV_IND_AI10,          l1_go_f7},
+
+	{ST_L1_F6, EV_TIMER3,            l1_timer3},
+	{ST_L1_F6, EV_IND_DP,            l1_go_f3},
+	{ST_L1_F6, EV_IND_AP,            l1_ignore},
+	{ST_L1_F6, EV_IND_AI8,           l1_go_f7},
+	{ST_L1_F6, EV_IND_AI10,          l1_go_f7},
+	{ST_L1_F7, EV_IND_RSY,           l1_go_f8},
+
+	{ST_L1_F7, EV_IND_DP,            l1_go_f3},
+	{ST_L1_F7, EV_IND_AP,            l1_go_f6},
+	{ST_L1_F7, EV_IND_AI8,           l1_ignore},
+	{ST_L1_F7, EV_IND_AI10,          l1_ignore},
+	{ST_L1_F7, EV_IND_RSY,           l1_go_f8},
+
+	{ST_L1_F8, EV_TIMER3,            l1_timer3},
+	{ST_L1_F8, EV_IND_DP,            l1_go_f3},
+	{ST_L1_F8, EV_IND_AP,            l1_go_f6},
+	{ST_L1_F8, EV_IND_AI8,           l1_go_f8},
+	{ST_L1_F8, EV_IND_AI10,          l1_go_f8},
+	{ST_L1_F8, EV_IND_RSY,           l1_ignore},
+};
+
+static __printf(2, 3)
+	void l1m_debug(struct FsmInst *fi, char *fmt, ...)
+{
+	va_list args;
+	char buf[256];
+
+	va_start(args, fmt);
+	vsnprintf(buf, sizeof(buf), fmt, args);
+	DBG(8, "%s", buf);
+	va_end(args);
+}
+
+/* ======================================================================
+ * D-Channel out
+ */
+
+/*
+  D OUT state machine:
+  ====================
+
+  Transmit short frame (< 16 bytes of encoded data):
+
+  L1 FRAME    D_OUT_STATE           USB                  D CHANNEL
+  --------    -----------           ---                  ---------
+
+  FIXME
+
+  -> [xx..xx]  SHORT_INIT            -> [7Exx..xxC1C27EFF]
+  SHORT_WAIT_DEN        <> OUT_D_COUNTER=16
+
+  END_OF_SHORT          <- DEN_EVENT         -> 7Exx
+  xxxx
+  xxxx
+  xxxx
+  xxxx
+  xxxx
+  C1C1
+  7EFF
+  WAIT_FOR_RESET_IDLE   <- D_UNDERRUN        <- (8ms)
+  IDLE                  <> Reset pipe
+
+
+
+  Transmit long frame (>= 16 bytes of encoded data):
+
+  L1 FRAME    D_OUT_STATE           USB                  D CHANNEL
+  --------    -----------           ---                  ---------
+
+  -> [xx...xx] IDLE
+  WAIT_FOR_STOP         <> OUT_D_COUNTER=0
+  WAIT_FOR_RESET        <> Reset pipe
+  STOP
+  INIT_LONG_FRAME       -> [7Exx..xx]
+  WAIT_DEN              <> OUT_D_COUNTER=16
+  OUT_NORMAL            <- DEN_EVENT       -> 7Exx
+  END_OF_FRAME_BUSY     -> [xxxx]             xxxx
+  END_OF_FRAME_NOT_BUSY -> [xxxx]             xxxx
+  -> [xxxx]		  xxxx
+  -> [C1C2]		  xxxx
+  -> [7EFF]		  xxxx
+  xxxx
+  xxxx
+  ....
+  xxxx
+  C1C2
+  7EFF
+  <- D_UNDERRUN      <- (> 8ms)
+  WAIT_FOR_STOP         <> OUT_D_COUNTER=0
+  WAIT_FOR_RESET        <> Reset pipe
+  STOP
+
+*/
+
+static struct Fsm dout_fsm;
+
+static char *strDoutState[] =
+{
+	"ST_DOUT_NONE",
+
+	"ST_DOUT_SHORT_INIT",
+	"ST_DOUT_SHORT_WAIT_DEN",
+
+	"ST_DOUT_LONG_INIT",
+	"ST_DOUT_LONG_WAIT_DEN",
+	"ST_DOUT_NORMAL",
+
+	"ST_DOUT_WAIT_FOR_UNDERRUN",
+	"ST_DOUT_WAIT_FOR_NOT_BUSY",
+	"ST_DOUT_WAIT_FOR_STOP",
+	"ST_DOUT_WAIT_FOR_RESET",
+};
+
+static char *strDoutEvent[] =
+{
+	"EV_DOUT_START_XMIT",
+	"EV_DOUT_COMPLETE",
+	"EV_DOUT_DEN",
+	"EV_DOUT_RESETED",
+	"EV_DOUT_STOPPED",
+	"EV_DOUT_COLL",
+	"EV_DOUT_UNDERRUN",
+};
+
+static __printf(2, 3)
+	void dout_debug(struct FsmInst *fi, char *fmt, ...)
+{
+	va_list args;
+	char buf[256];
+
+	va_start(args, fmt);
+	vsnprintf(buf, sizeof(buf), fmt, args);
+	DBG(0x2, "%s", buf);
+	va_end(args);
+}
+
+static void dout_stop_event(void *context)
+{
+	struct st5481_adapter *adapter = context;
+
+	FsmEvent(&adapter->d_out.fsm, EV_DOUT_STOPPED, NULL);
+}
+
+/*
+ * Start the transfer of a D channel frame.
+ */
+static void usb_d_out(struct st5481_adapter *adapter, int buf_nr)
+{
+	struct st5481_d_out *d_out = &adapter->d_out;
+	struct urb *urb;
+	unsigned int num_packets, packet_offset;
+	int len, buf_size, bytes_sent;
+	struct sk_buff *skb;
+	struct usb_iso_packet_descriptor *desc;
+
+	if (d_out->fsm.state != ST_DOUT_NORMAL)
+		return;
+
+	if (test_and_set_bit(buf_nr, &d_out->busy)) {
+		DBG(2, "ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy);
+		return;
+	}
+	urb = d_out->urb[buf_nr];
+
+	skb = d_out->tx_skb;
+
+	buf_size = NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT;
+
+	if (skb) {
+		len = isdnhdlc_encode(&d_out->hdlc_state,
+				      skb->data, skb->len, &bytes_sent,
+				      urb->transfer_buffer, buf_size);
+		skb_pull(skb, bytes_sent);
+	} else {
+		// Send flags or idle
+		len = isdnhdlc_encode(&d_out->hdlc_state,
+				      NULL, 0, &bytes_sent,
+				      urb->transfer_buffer, buf_size);
+	}
+
+	if (len < buf_size) {
+		FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN);
+	}
+	if (skb && !skb->len) {
+		d_out->tx_skb = NULL;
+		D_L1L2(adapter, PH_DATA | CONFIRM, NULL);
+		dev_kfree_skb_any(skb);
+	}
+
+	// Prepare the URB
+	urb->transfer_buffer_length = len;
+	num_packets = 0;
+	packet_offset = 0;
+	while (packet_offset < len) {
+		desc = &urb->iso_frame_desc[num_packets];
+		desc->offset = packet_offset;
+		desc->length = SIZE_ISO_PACKETS_D_OUT;
+		if (len - packet_offset < desc->length)
+			desc->length = len - packet_offset;
+		num_packets++;
+		packet_offset += desc->length;
+	}
+	urb->number_of_packets = num_packets;
+
+	// Prepare the URB
+	urb->dev = adapter->usb_dev;
+	// Need to transmit the next buffer 2ms after the DEN_EVENT
+	urb->transfer_flags = 0;
+	urb->start_frame = usb_get_current_frame_number(adapter->usb_dev) + 2;
+
+	DBG_ISO_PACKET(0x20, urb);
+
+	if (usb_submit_urb(urb, GFP_KERNEL) < 0) {
+		// There is another URB queued up
+		urb->transfer_flags = URB_ISO_ASAP;
+		SUBMIT_URB(urb, GFP_KERNEL);
+	}
+}
+
+static void fifo_reseted(void *context)
+{
+	struct st5481_adapter *adapter = context;
+
+	FsmEvent(&adapter->d_out.fsm, EV_DOUT_RESETED, NULL);
+}
+
+static void usb_d_out_complete(struct urb *urb)
+{
+	struct st5481_adapter *adapter = urb->context;
+	struct st5481_d_out *d_out = &adapter->d_out;
+	long buf_nr;
+
+	DBG(2, "");
+
+	buf_nr = get_buf_nr(d_out->urb, urb);
+	test_and_clear_bit(buf_nr, &d_out->busy);
+
+	if (unlikely(urb->status < 0)) {
+		switch (urb->status) {
+		case -ENOENT:
+		case -ESHUTDOWN:
+		case -ECONNRESET:
+			DBG(1, "urb killed status %d", urb->status);
+			break;
+		default:
+			WARNING("urb status %d", urb->status);
+			if (d_out->busy == 0) {
+				st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter);
+			}
+			break;
+		}
+		return; // Give up
+	}
+
+	FsmEvent(&adapter->d_out.fsm, EV_DOUT_COMPLETE, (void *) buf_nr);
+}
+
+/* ====================================================================== */
+
+static void dout_start_xmit(struct FsmInst *fsm, int event, void *arg)
+{
+	// FIXME unify?
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+	struct urb *urb;
+	int len, bytes_sent;
+	struct sk_buff *skb;
+	int buf_nr = 0;
+
+	skb = d_out->tx_skb;
+
+	DBG(2, "len=%d", skb->len);
+
+	isdnhdlc_out_init(&d_out->hdlc_state, HDLC_DCHANNEL | HDLC_BITREVERSE);
+
+	if (test_and_set_bit(buf_nr, &d_out->busy)) {
+		WARNING("ep %d urb %d busy %#lx", EP_D_OUT, buf_nr, d_out->busy);
+		return;
+	}
+	urb = d_out->urb[buf_nr];
+
+	DBG_SKB(0x10, skb);
+	len = isdnhdlc_encode(&d_out->hdlc_state,
+			      skb->data, skb->len, &bytes_sent,
+			      urb->transfer_buffer, 16);
+	skb_pull(skb, bytes_sent);
+
+	if (len < 16)
+		FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_INIT);
+	else
+		FsmChangeState(&d_out->fsm, ST_DOUT_LONG_INIT);
+
+	if (skb->len == 0) {
+		d_out->tx_skb = NULL;
+		D_L1L2(adapter, PH_DATA | CONFIRM, NULL);
+		dev_kfree_skb_any(skb);
+	}
+
+// Prepare the URB
+	urb->transfer_buffer_length = len;
+
+	urb->iso_frame_desc[0].offset = 0;
+	urb->iso_frame_desc[0].length = len;
+	urb->number_of_packets = 1;
+
+	// Prepare the URB
+	urb->dev = adapter->usb_dev;
+	urb->transfer_flags = URB_ISO_ASAP;
+
+	DBG_ISO_PACKET(0x20, urb);
+	SUBMIT_URB(urb, GFP_KERNEL);
+}
+
+static void dout_short_fifo(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	FsmChangeState(&d_out->fsm, ST_DOUT_SHORT_WAIT_DEN);
+	st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL);
+}
+
+static void dout_end_short_frame(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_UNDERRUN);
+}
+
+static void dout_long_enable_fifo(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 16, NULL, NULL);
+	FsmChangeState(&d_out->fsm, ST_DOUT_LONG_WAIT_DEN);
+}
+
+static void dout_long_den(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	FsmChangeState(&d_out->fsm, ST_DOUT_NORMAL);
+	usb_d_out(adapter, 0);
+	usb_d_out(adapter, 1);
+}
+
+static void dout_reset(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_RESET);
+	st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, fifo_reseted, adapter);
+}
+
+static void dout_stop(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_STOP);
+	st5481_usb_device_ctrl_msg(adapter, OUT_D_COUNTER, 0, dout_stop_event, adapter);
+}
+
+static void dout_underrun(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	if (test_bit(0, &d_out->busy) || test_bit(1, &d_out->busy)) {
+		FsmChangeState(&d_out->fsm, ST_DOUT_WAIT_FOR_NOT_BUSY);
+	}  else {
+		dout_stop(fsm, event, arg);
+	}
+}
+
+static void dout_check_busy(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	if (!test_bit(0, &d_out->busy) && !test_bit(1, &d_out->busy))
+		dout_stop(fsm, event, arg);
+}
+
+static void dout_reseted(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	FsmChangeState(&d_out->fsm, ST_DOUT_NONE);
+	// FIXME locking
+	if (d_out->tx_skb)
+		FsmEvent(&d_out->fsm, EV_DOUT_START_XMIT, NULL);
+}
+
+static void dout_complete(struct FsmInst *fsm, int event, void *arg)
+{
+	struct st5481_adapter *adapter = fsm->userdata;
+	long buf_nr = (long) arg;
+
+	usb_d_out(adapter, buf_nr);
+}
+
+static void dout_ignore(struct FsmInst *fsm, int event, void *arg)
+{
+}
+
+static struct FsmNode DoutFnList[] __initdata =
+{
+	{ST_DOUT_NONE,                   EV_DOUT_START_XMIT,   dout_start_xmit},
+
+	{ST_DOUT_SHORT_INIT,             EV_DOUT_COMPLETE,     dout_short_fifo},
+
+	{ST_DOUT_SHORT_WAIT_DEN,         EV_DOUT_DEN,          dout_end_short_frame},
+	{ST_DOUT_SHORT_WAIT_DEN,         EV_DOUT_UNDERRUN,     dout_underrun},
+
+	{ST_DOUT_LONG_INIT,              EV_DOUT_COMPLETE,     dout_long_enable_fifo},
+
+	{ST_DOUT_LONG_WAIT_DEN,          EV_DOUT_DEN,          dout_long_den},
+	{ST_DOUT_LONG_WAIT_DEN,          EV_DOUT_UNDERRUN,     dout_underrun},
+
+	{ST_DOUT_NORMAL,                 EV_DOUT_UNDERRUN,     dout_underrun},
+	{ST_DOUT_NORMAL,                 EV_DOUT_COMPLETE,     dout_complete},
+
+	{ST_DOUT_WAIT_FOR_UNDERRUN,      EV_DOUT_UNDERRUN,     dout_underrun},
+	{ST_DOUT_WAIT_FOR_UNDERRUN,      EV_DOUT_COMPLETE,     dout_ignore},
+
+	{ST_DOUT_WAIT_FOR_NOT_BUSY,      EV_DOUT_COMPLETE,     dout_check_busy},
+
+	{ST_DOUT_WAIT_FOR_STOP,          EV_DOUT_STOPPED,      dout_reset},
+
+	{ST_DOUT_WAIT_FOR_RESET,         EV_DOUT_RESETED,      dout_reseted},
+};
+
+void st5481_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg)
+{
+	struct st5481_adapter *adapter = hisax_d_if->priv;
+	struct sk_buff *skb = arg;
+
+	switch (pr) {
+	case PH_ACTIVATE | REQUEST:
+		FsmEvent(&adapter->l1m, EV_PH_ACTIVATE_REQ, NULL);
+		break;
+	case PH_DEACTIVATE | REQUEST:
+		FsmEvent(&adapter->l1m, EV_PH_DEACTIVATE_REQ, NULL);
+		break;
+	case PH_DATA | REQUEST:
+		DBG(2, "PH_DATA REQUEST len %d", skb->len);
+		BUG_ON(adapter->d_out.tx_skb);
+		adapter->d_out.tx_skb = skb;
+		FsmEvent(&adapter->d_out.fsm, EV_DOUT_START_XMIT, NULL);
+		break;
+	default:
+		WARNING("pr %#x\n", pr);
+		break;
+	}
+}
+
+/* ======================================================================
+ */
+
+/*
+ * Start receiving on the D channel since entered state F7.
+ */
+static void ph_connect(struct st5481_adapter *adapter)
+{
+	struct st5481_d_out *d_out = &adapter->d_out;
+	struct st5481_in *d_in = &adapter->d_in;
+
+	DBG(8, "");
+
+	FsmChangeState(&d_out->fsm, ST_DOUT_NONE);
+
+	//	st5481_usb_device_ctrl_msg(adapter, FFMSK_D, OUT_UNDERRUN, NULL, NULL);
+	st5481_usb_device_ctrl_msg(adapter, FFMSK_D, 0xfc, NULL, NULL);
+	st5481_in_mode(d_in, L1_MODE_HDLC);
+
+#ifdef LOOPBACK
+	// Turn loopback on (data sent on B and D looped back)
+	st5481_usb_device_ctrl_msg(cs, LBB, 0x04, NULL, NULL);
+#endif
+
+	st5481_usb_pipe_reset(adapter, EP_D_OUT | USB_DIR_OUT, NULL, NULL);
+
+	// Turn on the green LED to tell that we are in state F7
+	adapter->leds |= GREEN_LED;
+	st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
+}
+
+/*
+ * Stop receiving on the D channel since not in state F7.
+ */
+static void ph_disconnect(struct st5481_adapter *adapter)
+{
+	DBG(8, "");
+
+	st5481_in_mode(&adapter->d_in, L1_MODE_NULL);
+
+	// Turn off the green LED to tell that we left state F7
+	adapter->leds &= ~GREEN_LED;
+	st5481_usb_device_ctrl_msg(adapter, GPIO_OUT, adapter->leds, NULL, NULL);
+}
+
+static int st5481_setup_d_out(struct st5481_adapter *adapter)
+{
+	struct usb_device *dev = adapter->usb_dev;
+	struct usb_interface *intf;
+	struct usb_host_interface *altsetting = NULL;
+	struct usb_host_endpoint *endpoint;
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	DBG(2, "");
+
+	intf = usb_ifnum_to_if(dev, 0);
+	if (intf)
+		altsetting = usb_altnum_to_altsetting(intf, 3);
+	if (!altsetting)
+		return -ENXIO;
+
+	// Allocate URBs and buffers for the D channel out
+	endpoint = &altsetting->endpoint[EP_D_OUT-1];
+
+	DBG(2, "endpoint address=%02x,packet size=%d",
+	    endpoint->desc.bEndpointAddress, le16_to_cpu(endpoint->desc.wMaxPacketSize));
+
+	return st5481_setup_isocpipes(d_out->urb, dev,
+				      usb_sndisocpipe(dev, endpoint->desc.bEndpointAddress),
+				      NUM_ISO_PACKETS_D, SIZE_ISO_PACKETS_D_OUT,
+				      NUM_ISO_PACKETS_D * SIZE_ISO_PACKETS_D_OUT,
+				      usb_d_out_complete, adapter);
+}
+
+static void st5481_release_d_out(struct st5481_adapter *adapter)
+{
+	struct st5481_d_out *d_out = &adapter->d_out;
+
+	DBG(2, "");
+
+	st5481_release_isocpipes(d_out->urb);
+}
+
+int st5481_setup_d(struct st5481_adapter *adapter)
+{
+	int retval;
+
+	DBG(2, "");
+
+	retval = st5481_setup_d_out(adapter);
+	if (retval)
+		goto err;
+	adapter->d_in.bufsize = MAX_DFRAME_LEN_L1;
+	adapter->d_in.num_packets = NUM_ISO_PACKETS_D;
+	adapter->d_in.packet_size = SIZE_ISO_PACKETS_D_IN;
+	adapter->d_in.ep = EP_D_IN | USB_DIR_IN;
+	adapter->d_in.counter = IN_D_COUNTER;
+	adapter->d_in.adapter = adapter;
+	adapter->d_in.hisax_if = &adapter->hisax_d_if.ifc;
+	retval = st5481_setup_in(&adapter->d_in);
+	if (retval)
+		goto err_d_out;
+
+	adapter->l1m.fsm = &l1fsm;
+	adapter->l1m.state = ST_L1_F3;
+	adapter->l1m.debug = st5481_debug & 0x100;
+	adapter->l1m.userdata = adapter;
+	adapter->l1m.printdebug = l1m_debug;
+	FsmInitTimer(&adapter->l1m, &adapter->timer);
+
+	adapter->d_out.fsm.fsm = &dout_fsm;
+	adapter->d_out.fsm.state = ST_DOUT_NONE;
+	adapter->d_out.fsm.debug = st5481_debug & 0x100;
+	adapter->d_out.fsm.userdata = adapter;
+	adapter->d_out.fsm.printdebug = dout_debug;
+
+	return 0;
+
+err_d_out:
+	st5481_release_d_out(adapter);
+err:
+	return retval;
+}
+
+void st5481_release_d(struct st5481_adapter *adapter)
+{
+	DBG(2, "");
+
+	st5481_release_in(&adapter->d_in);
+	st5481_release_d_out(adapter);
+}
+
+/* ======================================================================
+ * init / exit
+ */
+
+int __init st5481_d_init(void)
+{
+	int retval;
+
+	l1fsm.state_count = L1_STATE_COUNT;
+	l1fsm.event_count = L1_EVENT_COUNT;
+	l1fsm.strEvent = strL1Event;
+	l1fsm.strState = strL1State;
+	retval = FsmNew(&l1fsm, L1FnList, ARRAY_SIZE(L1FnList));
+	if (retval)
+		goto err;
+
+	dout_fsm.state_count = DOUT_STATE_COUNT;
+	dout_fsm.event_count = DOUT_EVENT_COUNT;
+	dout_fsm.strEvent = strDoutEvent;
+	dout_fsm.strState = strDoutState;
+	retval = FsmNew(&dout_fsm, DoutFnList, ARRAY_SIZE(DoutFnList));
+	if (retval)
+		goto err_l1;
+
+	return 0;
+
+err_l1:
+	FsmFree(&l1fsm);
+err:
+	return retval;
+}
+
+// can't be __exit
+void st5481_d_exit(void)
+{
+	FsmFree(&l1fsm);
+	FsmFree(&dout_fsm);
+}