Merge tag 'nfc-next-3.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/nfc-3.0

So says Samuel Ortiz <sameo@linux.intel.com>:

This is the first NFC pull request for the 3.7 merge window.

With this one we get:

- HCI and LLC layers separation. We now can support various LLC
  protocols for HCI drivers, SHDLC being one of them. This will be needed as
  we're planning to support raw HCI chipsets that do the SHDLC encapsulation
  in firmware. So for now we have an SHDLC and a NOP LLC layers.

- pn533 command queueing implementation. This simplifies the pn533 locking
  logic and fixes a kernel warning.

- NCI p2p initiator mode implementation.

- Replace custom workqueues with system ones, for HCI and LLCP.

- Raw pn544 driver removal, as scheduled on the features-removal.txt file.

- A few HCI, SHDLC and LLCP fixes.

Signed-off-by: John W. Linville <linville@tuxdriver.com>

16 files changed, 966 insertions, 561 deletions

diff --git a/net/nfc/core.c b/net/nfc/core.c
index ff74979..c9eacc1 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -679,7 +679,7 @@ static void nfc_release(struct device *d)
 
 	if (dev->ops->check_presence) {
 		del_timer_sync(&dev->check_pres_timer);
-		destroy_workqueue(dev->check_pres_wq);
+		cancel_work_sync(&dev->check_pres_work);
 	}
 
 	nfc_genl_data_exit(&dev->genl_data);
@@ -715,7 +715,7 @@ static void nfc_check_pres_timeout(unsigned long data)
 {
 	struct nfc_dev *dev = (struct nfc_dev *)data;
 
-	queue_work(dev->check_pres_wq, &dev->check_pres_work);
+	queue_work(system_nrt_wq, &dev->check_pres_work);
 }
 
 struct class nfc_class = {
@@ -784,20 +784,11 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
 	dev->targets_generation = 1;
 
 	if (ops->check_presence) {
-		char name[32];
 		init_timer(&dev->check_pres_timer);
 		dev->check_pres_timer.data = (unsigned long)dev;
 		dev->check_pres_timer.function = nfc_check_pres_timeout;
 
 		INIT_WORK(&dev->check_pres_work, nfc_check_pres_work);
-		snprintf(name, sizeof(name), "nfc%d_check_pres_wq", dev->idx);
-		dev->check_pres_wq = alloc_workqueue(name, WQ_NON_REENTRANT |
-						     WQ_UNBOUND |
-						     WQ_MEM_RECLAIM, 1);
-		if (dev->check_pres_wq == NULL) {
-			kfree(dev);
-			return NULL;
-		}
 	}
 
 	return dev;
diff --git a/net/nfc/hci/Makefile b/net/nfc/hci/Makefile
index f9c44b2..c5dbb68 100644
--- a/net/nfc/hci/Makefile
+++ b/net/nfc/hci/Makefile
@@ -4,5 +4,5 @@
 
 obj-$(CONFIG_NFC_HCI) += hci.o
 
-hci-y			:= core.o hcp.o command.o
-hci-$(CONFIG_NFC_SHDLC)	+= shdlc.o
+hci-y			:= core.o hcp.o command.o llc.o llc_nop.o
+hci-$(CONFIG_NFC_SHDLC) += llc_shdlc.o
diff --git a/net/nfc/hci/command.c b/net/nfc/hci/command.c
index 46362ef..71c6a70 100644
--- a/net/nfc/hci/command.c
+++ b/net/nfc/hci/command.c
@@ -28,10 +28,29 @@
 
 #include "hci.h"
 
-static void nfc_hci_execute_cb(struct nfc_hci_dev *hdev, int err,
-			       struct sk_buff *skb, void *cb_data)
+static int nfc_hci_execute_cmd_async(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
+			       const u8 *param, size_t param_len,
+			       data_exchange_cb_t cb, void *cb_context)
 {
-	struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)cb_data;
+	pr_debug("exec cmd async through pipe=%d, cmd=%d, plen=%zd\n", pipe,
+		 cmd, param_len);
+
+	/* TODO: Define hci cmd execution delay. Should it be the same
+	 * for all commands?
+	 */
+	return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_COMMAND, cmd,
+				      param, param_len, cb, cb_context, 3000);
+}
+
+/*
+ * HCI command execution completion callback.
+ * err will be a standard linux error (may be converted from HCI response)
+ * skb contains the response data and must be disposed, or may be NULL if
+ * an error occured
+ */
+static void nfc_hci_execute_cb(void *context, struct sk_buff *skb, int err)
+{
+	struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)context;
 
 	pr_debug("HCI Cmd completed with result=%d\n", err);
 
@@ -55,7 +74,8 @@ static int nfc_hci_execute_cmd(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
 	hcp_ew.exec_complete = false;
 	hcp_ew.result_skb = NULL;
 
-	pr_debug("through pipe=%d, cmd=%d, plen=%zd\n", pipe, cmd, param_len);
+	pr_debug("exec cmd sync through pipe=%d, cmd=%d, plen=%zd\n", pipe,
+		 cmd, param_len);
 
 	/* TODO: Define hci cmd execution delay. Should it be the same
 	 * for all commands?
@@ -133,6 +153,23 @@ int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
 }
 EXPORT_SYMBOL(nfc_hci_send_cmd);
 
+int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
+			   const u8 *param, size_t param_len,
+			   data_exchange_cb_t cb, void *cb_context)
+{
+	u8 pipe;
+
+	pr_debug("\n");
+
+	pipe = hdev->gate2pipe[gate];
+	if (pipe == NFC_HCI_INVALID_PIPE)
+		return -EADDRNOTAVAIL;
+
+	return nfc_hci_execute_cmd_async(hdev, pipe, cmd, param, param_len,
+					 cb, cb_context);
+}
+EXPORT_SYMBOL(nfc_hci_send_cmd_async);
+
 int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
 		      const u8 *param, size_t param_len)
 {
diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index 1ac7b3f..d378d93 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -26,6 +26,7 @@
 
 #include <net/nfc/nfc.h>
 #include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
 
 #include "hci.h"
 
@@ -57,12 +58,11 @@ static void nfc_hci_msg_tx_work(struct work_struct *work)
 	if (hdev->cmd_pending_msg) {
 		if (timer_pending(&hdev->cmd_timer) == 0) {
 			if (hdev->cmd_pending_msg->cb)
-				hdev->cmd_pending_msg->cb(hdev,
-							  -ETIME,
-							  NULL,
-							  hdev->
+				hdev->cmd_pending_msg->cb(hdev->
 							  cmd_pending_msg->
-							  cb_context);
+							  cb_context,
+							  NULL,
+							  -ETIME);
 			kfree(hdev->cmd_pending_msg);
 			hdev->cmd_pending_msg = NULL;
 		} else
@@ -78,12 +78,12 @@ next_msg:
 
 	pr_debug("msg_tx_queue has a cmd to send\n");
 	while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) {
-		r = hdev->ops->xmit(hdev, skb);
+		r = nfc_llc_xmit_from_hci(hdev->llc, skb);
 		if (r < 0) {
 			kfree_skb(skb);
 			skb_queue_purge(&msg->msg_frags);
 			if (msg->cb)
-				msg->cb(hdev, r, NULL, msg->cb_context);
+				msg->cb(msg->cb_context, NULL, r);
 			kfree(msg);
 			break;
 		}
@@ -133,15 +133,15 @@ static void __nfc_hci_cmd_completion(struct nfc_hci_dev *hdev, int err,
 	del_timer_sync(&hdev->cmd_timer);
 
 	if (hdev->cmd_pending_msg->cb)
-		hdev->cmd_pending_msg->cb(hdev, err, skb,
-					  hdev->cmd_pending_msg->cb_context);
+		hdev->cmd_pending_msg->cb(hdev->cmd_pending_msg->cb_context,
+					  skb, err);
 	else
 		kfree_skb(skb);
 
 	kfree(hdev->cmd_pending_msg);
 	hdev->cmd_pending_msg = NULL;
 
-	queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
+	queue_work(system_nrt_wq, &hdev->msg_tx_work);
 }
 
 void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
@@ -326,7 +326,7 @@ static void nfc_hci_cmd_timeout(unsigned long data)
 {
 	struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data;
 
-	queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
+	queue_work(system_nrt_wq, &hdev->msg_tx_work);
 }
 
 static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count,
@@ -398,8 +398,7 @@ disconnect_all:
 	nfc_hci_disconnect_all_gates(hdev);
 
 exit:
-	if (skb)
-		kfree_skb(skb);
+	kfree_skb(skb);
 
 	return r;
 }
@@ -470,29 +469,38 @@ static int hci_dev_up(struct nfc_dev *nfc_dev)
 			return r;
 	}
 
+	r = nfc_llc_start(hdev->llc);
+	if (r < 0)
+		goto exit_close;
+
 	r = hci_dev_session_init(hdev);
 	if (r < 0)
-		goto exit;
+		goto exit_llc;
 
 	r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
 			       NFC_HCI_EVT_END_OPERATION, NULL, 0);
 	if (r < 0)
-		goto exit;
+		goto exit_llc;
 
 	if (hdev->ops->hci_ready) {
 		r = hdev->ops->hci_ready(hdev);
 		if (r < 0)
-			goto exit;
+			goto exit_llc;
 	}
 
 	r = hci_dev_version(hdev);
 	if (r < 0)
-		goto exit;
+		goto exit_llc;
+
+	return 0;
+
+exit_llc:
+	nfc_llc_stop(hdev->llc);
+
+exit_close:
+	if (hdev->ops->close)
+		hdev->ops->close(hdev);
 
-exit:
-	if (r < 0)
-		if (hdev->ops->close)
-			hdev->ops->close(hdev);
 	return r;
 }
 
@@ -500,6 +508,8 @@ static int hci_dev_down(struct nfc_dev *nfc_dev)
 {
 	struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
 
+	nfc_llc_stop(hdev->llc);
+
 	if (hdev->ops->close)
 		hdev->ops->close(hdev);
 
@@ -539,13 +549,37 @@ static void hci_deactivate_target(struct nfc_dev *nfc_dev,
 {
 }
 
+#define HCI_CB_TYPE_TRANSCEIVE 1
+
+static void hci_transceive_cb(void *context, struct sk_buff *skb, int err)
+{
+	struct nfc_hci_dev *hdev = context;
+
+	switch (hdev->async_cb_type) {
+	case HCI_CB_TYPE_TRANSCEIVE:
+		/*
+		 * TODO: Check RF Error indicator to make sure data is valid.
+		 * It seems that HCI cmd can complete without error, but data
+		 * can be invalid if an RF error occured? Ignore for now.
+		 */
+		if (err == 0)
+			skb_trim(skb, skb->len - 1); /* RF Err ind */
+
+		hdev->async_cb(hdev->async_cb_context, skb, err);
+		break;
+	default:
+		if (err == 0)
+			kfree_skb(skb);
+		break;
+	}
+}
+
 static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
 			  struct sk_buff *skb, data_exchange_cb_t cb,
 			  void *cb_context)
 {
 	struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
 	int r;
-	struct sk_buff *res_skb = NULL;
 
 	pr_debug("target_idx=%d\n", target->idx);
 
@@ -553,40 +587,37 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
 	case NFC_HCI_RF_READER_A_GATE:
 	case NFC_HCI_RF_READER_B_GATE:
 		if (hdev->ops->data_exchange) {
-			r = hdev->ops->data_exchange(hdev, target, skb,
-						     &res_skb);
+			r = hdev->ops->data_exchange(hdev, target, skb, cb,
+						     cb_context);
 			if (r <= 0)	/* handled */
 				break;
 		}
 
 		*skb_push(skb, 1) = 0;	/* CTR, see spec:10.2.2.1 */
-		r = nfc_hci_send_cmd(hdev, target->hci_reader_gate,
-				     NFC_HCI_WR_XCHG_DATA,
-				     skb->data, skb->len, &res_skb);
-		/*
-		 * TODO: Check RF Error indicator to make sure data is valid.
-		 * It seems that HCI cmd can complete without error, but data
-		 * can be invalid if an RF error occured? Ignore for now.
-		 */
-		if (r == 0)
-			skb_trim(res_skb, res_skb->len - 1); /* RF Err ind */
+
+		hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE;
+		hdev->async_cb = cb;
+		hdev->async_cb_context = cb_context;
+
+		r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
+					   NFC_HCI_WR_XCHG_DATA, skb->data,
+					   skb->len, hci_transceive_cb, hdev);
 		break;
 	default:
 		if (hdev->ops->data_exchange) {
-			r = hdev->ops->data_exchange(hdev, target, skb,
-						     &res_skb);
+			r = hdev->ops->data_exchange(hdev, target, skb, cb,
+						     cb_context);
 			if (r == 1)
 				r = -ENOTSUPP;
 		}
 		else
 			r = -ENOTSUPP;
+		break;
 	}
 
 	kfree_skb(skb);
 
-	cb(cb_context, res_skb, r);
-
-	return 0;
+	return r;
 }
 
 static int hci_check_presence(struct nfc_dev *nfc_dev,
@@ -600,6 +631,93 @@ static int hci_check_presence(struct nfc_dev *nfc_dev,
 	return 0;
 }
 
+static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err)
+{
+	mutex_lock(&hdev->msg_tx_mutex);
+
+	if (hdev->cmd_pending_msg == NULL) {
+		nfc_driver_failure(hdev->ndev, err);
+		goto exit;
+	}
+
+	__nfc_hci_cmd_completion(hdev, err, NULL);
+
+exit:
+	mutex_unlock(&hdev->msg_tx_mutex);
+}
+
+static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err)
+{
+	nfc_hci_failure(hdev, err);
+}
+
+static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hcp_packet *packet;
+	u8 type;
+	u8 instruction;
+	struct sk_buff *hcp_skb;
+	u8 pipe;
+	struct sk_buff *frag_skb;
+	int msg_len;
+
+	packet = (struct hcp_packet *)skb->data;
+	if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) {
+		skb_queue_tail(&hdev->rx_hcp_frags, skb);
+		return;
+	}
+
+	/* it's the last fragment. Does it need re-aggregation? */
+	if (skb_queue_len(&hdev->rx_hcp_frags)) {
+		pipe = packet->header & NFC_HCI_FRAGMENT;
+		skb_queue_tail(&hdev->rx_hcp_frags, skb);
+
+		msg_len = 0;
+		skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
+			msg_len += (frag_skb->len -
+				    NFC_HCI_HCP_PACKET_HEADER_LEN);
+		}
+
+		hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN +
+					     msg_len, GFP_KERNEL);
+		if (hcp_skb == NULL) {
+			nfc_hci_failure(hdev, -ENOMEM);
+			return;
+		}
+
+		*skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
+
+		skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
+			msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN;
+			memcpy(skb_put(hcp_skb, msg_len),
+			       frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN,
+			       msg_len);
+		}
+
+		skb_queue_purge(&hdev->rx_hcp_frags);
+	} else {
+		packet->header &= NFC_HCI_FRAGMENT;
+		hcp_skb = skb;
+	}
+
+	/* if this is a response, dispatch immediately to
+	 * unblock waiting cmd context. Otherwise, enqueue to dispatch
+	 * in separate context where handler can also execute command.
+	 */
+	packet = (struct hcp_packet *)hcp_skb->data;
+	type = HCP_MSG_GET_TYPE(packet->message.header);
+	if (type == NFC_HCI_HCP_RESPONSE) {
+		pipe = packet->header;
+		instruction = HCP_MSG_GET_CMD(packet->message.header);
+		skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN +
+			 NFC_HCI_HCP_MESSAGE_HEADER_LEN);
+		nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
+	} else {
+		skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
+		queue_work(system_nrt_wq, &hdev->msg_rx_work);
+	}
+}
+
 static struct nfc_ops hci_nfc_ops = {
 	.dev_up = hci_dev_up,
 	.dev_down = hci_dev_down,
@@ -614,6 +732,7 @@ static struct nfc_ops hci_nfc_ops = {
 struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
 					    struct nfc_hci_init_data *init_data,
 					    u32 protocols,
+					    const char *llc_name,
 					    int tx_headroom,
 					    int tx_tailroom,
 					    int max_link_payload)
@@ -630,10 +749,19 @@ struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
 	if (hdev == NULL)
 		return NULL;
 
+	hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit,
+				     nfc_hci_recv_from_llc, tx_headroom,
+				     tx_tailroom, nfc_hci_llc_failure);
+	if (hdev->llc == NULL) {
+		kfree(hdev);
+		return NULL;
+	}
+
 	hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols,
 					 tx_headroom + HCI_CMDS_HEADROOM,
 					 tx_tailroom);
 	if (!hdev->ndev) {
+		nfc_llc_free(hdev->llc);
 		kfree(hdev);
 		return NULL;
 	}
@@ -653,29 +781,18 @@ EXPORT_SYMBOL(nfc_hci_allocate_device);
 void nfc_hci_free_device(struct nfc_hci_dev *hdev)
 {
 	nfc_free_device(hdev->ndev);
+	nfc_llc_free(hdev->llc);
 	kfree(hdev);
 }
 EXPORT_SYMBOL(nfc_hci_free_device);
 
 int nfc_hci_register_device(struct nfc_hci_dev *hdev)
 {
-	struct device *dev = &hdev->ndev->dev;
-	const char *devname = dev_name(dev);
-	char name[32];
-	int r = 0;
-
 	mutex_init(&hdev->msg_tx_mutex);
 
 	INIT_LIST_HEAD(&hdev->msg_tx_queue);
 
 	INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work);
-	snprintf(name, sizeof(name), "%s_hci_msg_tx_wq", devname);
-	hdev->msg_tx_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
-					  WQ_MEM_RECLAIM, 1);
-	if (hdev->msg_tx_wq == NULL) {
-		r = -ENOMEM;
-		goto exit;
-	}
 
 	init_timer(&hdev->cmd_timer);
 	hdev->cmd_timer.data = (unsigned long)hdev;
@@ -684,27 +801,10 @@ int nfc_hci_register_device(struct nfc_hci_dev *hdev)
 	skb_queue_head_init(&hdev->rx_hcp_frags);
 
 	INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work);
-	snprintf(name, sizeof(name), "%s_hci_msg_rx_wq", devname);
-	hdev->msg_rx_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
-					  WQ_MEM_RECLAIM, 1);
-	if (hdev->msg_rx_wq == NULL) {
-		r = -ENOMEM;
-		goto exit;
-	}
 
 	skb_queue_head_init(&hdev->msg_rx_queue);
 
-	r = nfc_register_device(hdev->ndev);
-
-exit:
-	if (r < 0) {
-		if (hdev->msg_tx_wq)
-			destroy_workqueue(hdev->msg_tx_wq);
-		if (hdev->msg_rx_wq)
-			destroy_workqueue(hdev->msg_rx_wq);
-	}
-
-	return r;
+	return nfc_register_device(hdev->ndev);
 }
 EXPORT_SYMBOL(nfc_hci_register_device);
 
@@ -725,9 +825,8 @@ void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
 
 	nfc_unregister_device(hdev->ndev);
 
-	destroy_workqueue(hdev->msg_tx_wq);
-
-	destroy_workqueue(hdev->msg_rx_wq);
+	cancel_work_sync(&hdev->msg_tx_work);
+	cancel_work_sync(&hdev->msg_rx_work);
 }
 EXPORT_SYMBOL(nfc_hci_unregister_device);
 
@@ -743,93 +842,30 @@ void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev)
 }
 EXPORT_SYMBOL(nfc_hci_get_clientdata);
 
-static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err)
-{
-	mutex_lock(&hdev->msg_tx_mutex);
-
-	if (hdev->cmd_pending_msg == NULL) {
-		nfc_driver_failure(hdev->ndev, err);
-		goto exit;
-	}
-
-	__nfc_hci_cmd_completion(hdev, err, NULL);
-
-exit:
-	mutex_unlock(&hdev->msg_tx_mutex);
-}
-
 void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err)
 {
 	nfc_hci_failure(hdev, err);
 }
 EXPORT_SYMBOL(nfc_hci_driver_failure);
 
-void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+void inline nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
 {
-	struct hcp_packet *packet;
-	u8 type;
-	u8 instruction;
-	struct sk_buff *hcp_skb;
-	u8 pipe;
-	struct sk_buff *frag_skb;
-	int msg_len;
-
-	packet = (struct hcp_packet *)skb->data;
-	if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) {
-		skb_queue_tail(&hdev->rx_hcp_frags, skb);
-		return;
-	}
-
-	/* it's the last fragment. Does it need re-aggregation? */
-	if (skb_queue_len(&hdev->rx_hcp_frags)) {
-		pipe = packet->header & NFC_HCI_FRAGMENT;
-		skb_queue_tail(&hdev->rx_hcp_frags, skb);
-
-		msg_len = 0;
-		skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
-			msg_len += (frag_skb->len -
-				    NFC_HCI_HCP_PACKET_HEADER_LEN);
-		}
-
-		hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN +
-					     msg_len, GFP_KERNEL);
-		if (hcp_skb == NULL) {
-			nfc_hci_failure(hdev, -ENOMEM);
-			return;
-		}
-
-		*skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
-
-		skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
-			msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN;
-			memcpy(skb_put(hcp_skb, msg_len),
-			       frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN,
-			       msg_len);
-		}
+	nfc_llc_rcv_from_drv(hdev->llc, skb);
+}
+EXPORT_SYMBOL(nfc_hci_recv_frame);
 
-		skb_queue_purge(&hdev->rx_hcp_frags);
-	} else {
-		packet->header &= NFC_HCI_FRAGMENT;
-		hcp_skb = skb;
-	}
+static int __init nfc_hci_init(void)
+{
+	return nfc_llc_init();
+}
 
-	/* if this is a response, dispatch immediately to
-	 * unblock waiting cmd context. Otherwise, enqueue to dispatch
-	 * in separate context where handler can also execute command.
-	 */
-	packet = (struct hcp_packet *)hcp_skb->data;
-	type = HCP_MSG_GET_TYPE(packet->message.header);
-	if (type == NFC_HCI_HCP_RESPONSE) {
-		pipe = packet->header;
-		instruction = HCP_MSG_GET_CMD(packet->message.header);
-		skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN +
-			 NFC_HCI_HCP_MESSAGE_HEADER_LEN);
-		nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
-	} else {
-		skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
-		queue_work(hdev->msg_rx_wq, &hdev->msg_rx_work);
-	}
+static void __exit nfc_hci_exit(void)
+{
+	nfc_llc_exit();
 }
-EXPORT_SYMBOL(nfc_hci_recv_frame);
+
+subsys_initcall(nfc_hci_init);
+module_exit(nfc_hci_exit);
 
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("NFC HCI Core");
diff --git a/net/nfc/hci/hci.h b/net/nfc/hci/hci.h
index fa9a21e..b274d12 100644
--- a/net/nfc/hci/hci.h
+++ b/net/nfc/hci/hci.h
@@ -20,6 +20,8 @@
 #ifndef __LOCAL_HCI_H
 #define __LOCAL_HCI_H
 
+#include <net/nfc/hci.h>
+
 struct gate_pipe_map {
 	u8 gate;
 	u8 pipe;
@@ -35,15 +37,6 @@ struct hcp_packet {
 	struct hcp_message message;
 } __packed;
 
-/*
- * HCI command execution completion callback.
- * result will be a standard linux error (may be converted from HCI response)
- * skb contains the response data and must be disposed, or may be NULL if
- * an error occured
- */
-typedef void (*hci_cmd_cb_t) (struct nfc_hci_dev *hdev, int result,
-			      struct sk_buff *skb, void *cb_data);
-
 struct hcp_exec_waiter {
 	wait_queue_head_t *wq;
 	bool exec_complete;
@@ -55,7 +48,7 @@ struct hci_msg {
 	struct list_head msg_l;
 	struct sk_buff_head msg_frags;
 	bool wait_response;
-	hci_cmd_cb_t cb;
+	data_exchange_cb_t cb;
 	void *cb_context;
 	unsigned long completion_delay;
 };
@@ -83,7 +76,7 @@ struct hci_create_pipe_resp {
 int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
 			   u8 type, u8 instruction,
 			   const u8 *payload, size_t payload_len,
-			   hci_cmd_cb_t cb, void *cb_data,
+			   data_exchange_cb_t cb, void *cb_context,
 			   unsigned long completion_delay);
 
 u8 nfc_hci_pipe2gate(struct nfc_hci_dev *hdev, u8 pipe);
diff --git a/net/nfc/hci/hcp.c b/net/nfc/hci/hcp.c
index f4dad1a..208eedd 100644
--- a/net/nfc/hci/hcp.c
+++ b/net/nfc/hci/hcp.c
@@ -35,7 +35,7 @@
 int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
 			   u8 type, u8 instruction,
 			   const u8 *payload, size_t payload_len,
-			   hci_cmd_cb_t cb, void *cb_data,
+			   data_exchange_cb_t cb, void *cb_context,
 			   unsigned long completion_delay)
 {
 	struct nfc_dev *ndev = hdev->ndev;
@@ -52,7 +52,7 @@ int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
 	skb_queue_head_init(&cmd->msg_frags);
 	cmd->wait_response = (type == NFC_HCI_HCP_COMMAND) ? true : false;
 	cmd->cb = cb;
-	cmd->cb_context = cb_data;
+	cmd->cb_context = cb_context;
 	cmd->completion_delay = completion_delay;
 
 	hci_len = payload_len + 1;
@@ -108,7 +108,7 @@ int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
 	list_add_tail(&cmd->msg_l, &hdev->msg_tx_queue);
 	mutex_unlock(&hdev->msg_tx_mutex);
 
-	queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
+	queue_work(system_nrt_wq, &hdev->msg_tx_work);
 
 	return 0;
 
diff --git a/net/nfc/hci/llc.c b/net/nfc/hci/llc.c
new file mode 100644
index 0000000..ae1205d
--- /dev/null
+++ b/net/nfc/hci/llc.c
@@ -0,0 +1,170 @@
+/*
+ * Link Layer Control manager
+ *
+ * Copyright (C) 2012  Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <net/nfc/llc.h>
+
+#include "llc.h"
+
+static struct list_head llc_engines;
+
+int nfc_llc_init(void)
+{
+	int r;
+
+	INIT_LIST_HEAD(&llc_engines);
+
+	r = nfc_llc_nop_register();
+	if (r)
+		goto exit;
+
+	r = nfc_llc_shdlc_register();
+	if (r)
+		goto exit;
+
+	return 0;
+
+exit:
+	nfc_llc_exit();
+	return r;
+}
+
+void nfc_llc_exit(void)
+{
+	struct nfc_llc_engine *llc_engine, *n;
+
+	list_for_each_entry_safe(llc_engine, n, &llc_engines, entry) {
+		list_del(&llc_engine->entry);
+		kfree(llc_engine->name);
+		kfree(llc_engine);
+	}
+}
+
+int nfc_llc_register(const char *name, struct nfc_llc_ops *ops)
+{
+	struct nfc_llc_engine *llc_engine;
+
+	llc_engine = kzalloc(sizeof(struct nfc_llc_engine), GFP_KERNEL);
+	if (llc_engine == NULL)
+		return -ENOMEM;
+
+	llc_engine->name = kstrdup(name, GFP_KERNEL);
+	if (llc_engine->name == NULL) {
+		kfree(llc_engine);
+		return -ENOMEM;
+	}
+	llc_engine->ops = ops;
+
+	INIT_LIST_HEAD(&llc_engine->entry);
+	list_add_tail (&llc_engine->entry, &llc_engines);
+
+	return 0;
+}
+
+static struct nfc_llc_engine *nfc_llc_name_to_engine(const char *name)
+{
+	struct nfc_llc_engine *llc_engine;
+
+	list_for_each_entry(llc_engine, &llc_engines, entry) {
+		if (strcmp(llc_engine->name, name) == 0)
+			return llc_engine;
+	}
+
+	return NULL;
+}
+
+void nfc_llc_unregister(const char *name)
+{
+	struct nfc_llc_engine *llc_engine;
+
+	llc_engine = nfc_llc_name_to_engine(name);
+	if (llc_engine == NULL)
+		return;
+
+	list_del(&llc_engine->entry);
+	kfree(llc_engine->name);
+	kfree(llc_engine);
+}
+
+struct nfc_llc *nfc_llc_allocate(const char *name, struct nfc_hci_dev *hdev,
+				 xmit_to_drv_t xmit_to_drv,
+				 rcv_to_hci_t rcv_to_hci, int tx_headroom,
+				 int tx_tailroom, llc_failure_t llc_failure)
+{
+	struct nfc_llc_engine *llc_engine;
+	struct nfc_llc *llc;
+
+	llc_engine = nfc_llc_name_to_engine(name);
+	if (llc_engine == NULL)
+		return NULL;
+
+	llc = kzalloc(sizeof(struct nfc_llc), GFP_KERNEL);
+	if (llc == NULL)
+		return NULL;
+
+	llc->data = llc_engine->ops->init(hdev, xmit_to_drv, rcv_to_hci,
+					  tx_headroom, tx_tailroom,
+					  &llc->rx_headroom, &llc->rx_tailroom,
+					  llc_failure);
+	if (llc->data == NULL) {
+		kfree(llc);
+		return NULL;
+	}
+	llc->ops = llc_engine->ops;
+
+	return llc;
+}
+
+void nfc_llc_free(struct nfc_llc *llc)
+{
+	llc->ops->deinit(llc);
+	kfree(llc);
+}
+
+inline void nfc_llc_get_rx_head_tail_room(struct nfc_llc *llc, int *rx_headroom,
+					  int *rx_tailroom)
+{
+	*rx_headroom = llc->rx_headroom;
+	*rx_tailroom = llc->rx_tailroom;
+}
+
+inline int nfc_llc_start(struct nfc_llc *llc)
+{
+	return llc->ops->start(llc);
+}
+
+inline int nfc_llc_stop(struct nfc_llc *llc)
+{
+	return llc->ops->stop(llc);
+}
+
+inline void nfc_llc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
+{
+	llc->ops->rcv_from_drv(llc, skb);
+}
+
+inline int nfc_llc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
+{
+	return llc->ops->xmit_from_hci(llc, skb);
+}
+
+inline void *nfc_llc_get_data(struct nfc_llc *llc)
+{
+	return llc->data;
+}
diff --git a/net/nfc/hci/llc.h b/net/nfc/hci/llc.h
new file mode 100644
index 0000000..c7014fd
--- /dev/null
+++ b/net/nfc/hci/llc.h
@@ -0,0 +1,61 @@
+/*
+ * Link Layer Control manager
+ *
+ * Copyright (C) 2012  Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __LOCAL_LLC_H_
+#define __LOCAL_LLC_H_
+
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+#include <linux/skbuff.h>
+
+struct nfc_llc_ops {
+	void *(*init) (struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
+		       rcv_to_hci_t rcv_to_hci, int tx_headroom,
+		       int tx_tailroom, int *rx_headroom, int *rx_tailroom,
+		       llc_failure_t llc_failure);
+	void (*deinit) (struct nfc_llc *llc);
+	int (*start) (struct nfc_llc *llc);
+	int (*stop) (struct nfc_llc *llc);
+	void (*rcv_from_drv) (struct nfc_llc *llc, struct sk_buff *skb);
+	int (*xmit_from_hci) (struct nfc_llc *llc, struct sk_buff *skb);
+};
+
+struct nfc_llc_engine {
+	const char *name;
+	struct nfc_llc_ops *ops;
+	struct list_head entry;
+};
+
+struct nfc_llc {
+	void *data;
+	struct nfc_llc_ops *ops;
+	int rx_headroom;
+	int rx_tailroom;
+};
+
+void *nfc_llc_get_data(struct nfc_llc *llc);
+
+int nfc_llc_register(const char *name, struct nfc_llc_ops *ops);
+void nfc_llc_unregister(const char *name);
+
+int nfc_llc_nop_register(void);
+int nfc_llc_shdlc_register(void);
+
+#endif /* __LOCAL_LLC_H_ */
diff --git a/net/nfc/hci/llc_nop.c b/net/nfc/hci/llc_nop.c
new file mode 100644
index 0000000..87b1029
--- /dev/null
+++ b/net/nfc/hci/llc_nop.c
@@ -0,0 +1,99 @@
+/*
+ * nop (passthrough) Link Layer Control
+ *
+ * Copyright (C) 2012  Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/types.h>
+
+#include "llc.h"
+
+struct llc_nop {
+	struct nfc_hci_dev *hdev;
+	xmit_to_drv_t xmit_to_drv;
+	rcv_to_hci_t rcv_to_hci;
+	int tx_headroom;
+	int tx_tailroom;
+	llc_failure_t llc_failure;
+};
+
+static void *llc_nop_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
+			  rcv_to_hci_t rcv_to_hci, int tx_headroom,
+			  int tx_tailroom, int *rx_headroom, int *rx_tailroom,
+			  llc_failure_t llc_failure)
+{
+	struct llc_nop *llc_nop;
+
+	*rx_headroom = 0;
+	*rx_tailroom = 0;
+
+	llc_nop = kzalloc(sizeof(struct llc_nop), GFP_KERNEL);
+	if (llc_nop == NULL)
+		return NULL;
+
+	llc_nop->hdev = hdev;
+	llc_nop->xmit_to_drv = xmit_to_drv;
+	llc_nop->rcv_to_hci = rcv_to_hci;
+	llc_nop->tx_headroom = tx_headroom;
+	llc_nop->tx_tailroom = tx_tailroom;
+	llc_nop->llc_failure = llc_failure;
+
+	return llc_nop;
+}
+
+static void llc_nop_deinit(struct nfc_llc *llc)
+{
+	kfree(nfc_llc_get_data(llc));
+}
+
+static int llc_nop_start(struct nfc_llc *llc)
+{
+	return 0;
+}
+
+static int llc_nop_stop(struct nfc_llc *llc)
+{
+	return 0;
+}
+
+static void llc_nop_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
+{
+	struct llc_nop *llc_nop = nfc_llc_get_data(llc);
+
+	llc_nop->rcv_to_hci(llc_nop->hdev, skb);
+}
+
+static int llc_nop_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
+{
+	struct llc_nop *llc_nop = nfc_llc_get_data(llc);
+
+	return llc_nop->xmit_to_drv(llc_nop->hdev, skb);
+}
+
+static struct nfc_llc_ops llc_nop_ops = {
+	.init = llc_nop_init,
+	.deinit = llc_nop_deinit,
+	.start = llc_nop_start,
+	.stop = llc_nop_stop,
+	.rcv_from_drv = llc_nop_rcv_from_drv,
+	.xmit_from_hci = llc_nop_xmit_from_hci,
+};
+
+int nfc_llc_nop_register(void)
+{
+	return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops);
+}
diff --git a/net/nfc/hci/shdlc.c b/net/nfc/hci/llc_shdlc.c
index 6f840c1..8f69d79 100644
--- a/net/nfc/hci/shdlc.c
+++ b/net/nfc/hci/llc_shdlc.c
@@ -1,10 +1,11 @@
 /*
+ * shdlc Link Layer Control
+ *
  * Copyright (C) 2012  Intel Corporation. All rights reserved.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -19,18 +20,65 @@
 
 #define pr_fmt(fmt) "shdlc: %s: " fmt, __func__
 
+#include <linux/types.h>
 #include <linux/sched.h>
-#include <linux/export.h>
 #include <linux/wait.h>
-#include <linux/crc-ccitt.h>
 #include <linux/slab.h>
 #include <linux/skbuff.h>
 
-#include <net/nfc/hci.h>
-#include <net/nfc/shdlc.h>
+#include "llc.h"
+
+enum shdlc_state {
+	SHDLC_DISCONNECTED = 0,
+	SHDLC_CONNECTING = 1,
+	SHDLC_NEGOTIATING = 2,
+	SHDLC_HALF_CONNECTED = 3,
+	SHDLC_CONNECTED = 4
+};
+
+struct llc_shdlc {
+	struct nfc_hci_dev *hdev;
+	xmit_to_drv_t xmit_to_drv;
+	rcv_to_hci_t rcv_to_hci;
+
+	struct mutex state_mutex;
+	enum shdlc_state state;
+	int hard_fault;
+
+	wait_queue_head_t *connect_wq;
+	int connect_tries;
+	int connect_result;
+	struct timer_list connect_timer;/* aka T3 in spec 10.6.1 */
+
+	u8 w;				/* window size */
+	bool srej_support;
+
+	struct timer_list t1_timer;	/* send ack timeout */
+	bool t1_active;
+
+	struct timer_list t2_timer;	/* guard/retransmit timeout */
+	bool t2_active;
+
+	int ns;				/* next seq num for send */
+	int nr;				/* next expected seq num for receive */
+	int dnr;			/* oldest sent unacked seq num */
+
+	struct sk_buff_head rcv_q;
+
+	struct sk_buff_head send_q;
+	bool rnr;			/* other side is not ready to receive */
+
+	struct sk_buff_head ack_pending_q;
+
+	struct work_struct sm_work;
+
+	int tx_headroom;
+	int tx_tailroom;
+
+	llc_failure_t llc_failure;
+};
 
 #define SHDLC_LLC_HEAD_ROOM	2
-#define SHDLC_LLC_TAIL_ROOM	2
 
 #define SHDLC_MAX_WINDOW	4
 #define SHDLC_SREJ_SUPPORT	false
@@ -71,7 +119,7 @@ do {								  \
 } while (0)
 
 /* checks x < y <= z modulo 8 */
-static bool nfc_shdlc_x_lt_y_lteq_z(int x, int y, int z)
+static bool llc_shdlc_x_lt_y_lteq_z(int x, int y, int z)
 {
 	if (x < z)
 		return ((x < y) && (y <= z)) ? true : false;
@@ -80,7 +128,7 @@ static bool nfc_shdlc_x_lt_y_lteq_z(int x, int y, int z)
 }
 
 /* checks x <= y < z modulo 8 */
-static bool nfc_shdlc_x_lteq_y_lt_z(int x, int y, int z)
+static bool llc_shdlc_x_lteq_y_lt_z(int x, int y, int z)
 {
 	if (x <= z)
 		return ((x <= y) && (y < z)) ? true : false;
@@ -88,36 +136,21 @@ static bool nfc_shdlc_x_lteq_y_lt_z(int x, int y, int z)
 		return ((y >= x) || (y < z)) ? true : false;
 }
 
-static struct sk_buff *nfc_shdlc_alloc_skb(struct nfc_shdlc *shdlc,
+static struct sk_buff *llc_shdlc_alloc_skb(struct llc_shdlc *shdlc,
 					   int payload_len)
 {
 	struct sk_buff *skb;
 
-	skb = alloc_skb(shdlc->client_headroom + SHDLC_LLC_HEAD_ROOM +
-			shdlc->client_tailroom + SHDLC_LLC_TAIL_ROOM +
-			payload_len, GFP_KERNEL);
+	skb = alloc_skb(shdlc->tx_headroom + SHDLC_LLC_HEAD_ROOM +
+			shdlc->tx_tailroom + payload_len, GFP_KERNEL);
 	if (skb)
-		skb_reserve(skb, shdlc->client_headroom + SHDLC_LLC_HEAD_ROOM);
+		skb_reserve(skb, shdlc->tx_headroom + SHDLC_LLC_HEAD_ROOM);
 
 	return skb;
 }
 
-static void nfc_shdlc_add_len_crc(struct sk_buff *skb)
-{
-	u16 crc;
-	int len;
-
-	len = skb->len + 2;
-	*skb_push(skb, 1) = len;
-
-	crc = crc_ccitt(0xffff, skb->data, skb->len);
-	crc = ~crc;
-	*skb_put(skb, 1) = crc & 0xff;
-	*skb_put(skb, 1) = crc >> 8;
-}
-
 /* immediately sends an S frame. */
-static int nfc_shdlc_send_s_frame(struct nfc_shdlc *shdlc,
+static int llc_shdlc_send_s_frame(struct llc_shdlc *shdlc,
 				  enum sframe_type sframe_type, int nr)
 {
 	int r;
@@ -125,15 +158,13 @@ static int nfc_shdlc_send_s_frame(struct nfc_shdlc *shdlc,
 
 	pr_debug("sframe_type=%d nr=%d\n", sframe_type, nr);
 
-	skb = nfc_shdlc_alloc_skb(shdlc, 0);
+	skb = llc_shdlc_alloc_skb(shdlc, 0);
 	if (skb == NULL)
 		return -ENOMEM;
 
 	*skb_push(skb, 1) = SHDLC_CONTROL_HEAD_S | (sframe_type << 3) | nr;
 
-	nfc_shdlc_add_len_crc(skb);
-
-	r = shdlc->ops->xmit(shdlc, skb);
+	r = shdlc->xmit_to_drv(shdlc->hdev, skb);
 
 	kfree_skb(skb);
 
@@ -141,7 +172,7 @@ static int nfc_shdlc_send_s_frame(struct nfc_shdlc *shdlc,
 }
 
 /* immediately sends an U frame. skb may contain optional payload */
-static int nfc_shdlc_send_u_frame(struct nfc_shdlc *shdlc,
+static int llc_shdlc_send_u_frame(struct llc_shdlc *shdlc,
 				  struct sk_buff *skb,
 				  enum uframe_modifier uframe_modifier)
 {
@@ -151,9 +182,7 @@ static int nfc_shdlc_send_u_frame(struct nfc_shdlc *shdlc,
 
 	*skb_push(skb, 1) = SHDLC_CONTROL_HEAD_U | uframe_modifier;
 
-	nfc_shdlc_add_len_crc(skb);
-
-	r = shdlc->ops->xmit(shdlc, skb);
+	r = shdlc->xmit_to_drv(shdlc->hdev, skb);
 
 	kfree_skb(skb);
 
@@ -164,7 +193,7 @@ static int nfc_shdlc_send_u_frame(struct nfc_shdlc *shdlc,
  * Free ack_pending frames until y_nr - 1, and reset t2 according to
  * the remaining oldest ack_pending frame sent time
  */
-static void nfc_shdlc_reset_t2(struct nfc_shdlc *shdlc, int y_nr)
+static void llc_shdlc_reset_t2(struct llc_shdlc *shdlc, int y_nr)
 {
 	struct sk_buff *skb;
 	int dnr = shdlc->dnr;	/* MUST initially be < y_nr */
@@ -204,7 +233,7 @@ static void nfc_shdlc_reset_t2(struct nfc_shdlc *shdlc, int y_nr)
  * Receive validated frames from lower layer. skb contains HCI payload only.
  * Handle according to algorithm at spec:10.8.2
  */
-static void nfc_shdlc_rcv_i_frame(struct nfc_shdlc *shdlc,
+static void llc_shdlc_rcv_i_frame(struct llc_shdlc *shdlc,
 				  struct sk_buff *skb, int ns, int nr)
 {
 	int x_ns = ns;
@@ -216,66 +245,64 @@ static void nfc_shdlc_rcv_i_frame(struct nfc_shdlc *shdlc,
 		goto exit;
 
 	if (x_ns != shdlc->nr) {
-		nfc_shdlc_send_s_frame(shdlc, S_FRAME_REJ, shdlc->nr);
+		llc_shdlc_send_s_frame(shdlc, S_FRAME_REJ, shdlc->nr);
 		goto exit;
 	}
 
 	if (shdlc->t1_active == false) {
 		shdlc->t1_active = true;
-		mod_timer(&shdlc->t1_timer,
+		mod_timer(&shdlc->t1_timer, jiffies +
 			  msecs_to_jiffies(SHDLC_T1_VALUE_MS(shdlc->w)));
 		pr_debug("(re)Start T1(send ack)\n");
 	}
 
 	if (skb->len) {
-		nfc_hci_recv_frame(shdlc->hdev, skb);
+		shdlc->rcv_to_hci(shdlc->hdev, skb);
 		skb = NULL;
 	}
 
 	shdlc->nr = (shdlc->nr + 1) % 8;
 
-	if (nfc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
-		nfc_shdlc_reset_t2(shdlc, y_nr);
+	if (llc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
+		llc_shdlc_reset_t2(shdlc, y_nr);
 
 		shdlc->dnr = y_nr;
 	}
 
 exit:
-	if (skb)
-		kfree_skb(skb);
+	kfree_skb(skb);
 }
 
-static void nfc_shdlc_rcv_ack(struct nfc_shdlc *shdlc, int y_nr)
+static void llc_shdlc_rcv_ack(struct llc_shdlc *shdlc, int y_nr)
 {
 	pr_debug("remote acked up to frame %d excluded\n", y_nr);
 
-	if (nfc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
-		nfc_shdlc_reset_t2(shdlc, y_nr);
+	if (llc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
+		llc_shdlc_reset_t2(shdlc, y_nr);
 		shdlc->dnr = y_nr;
 	}
 }
 
-static void nfc_shdlc_requeue_ack_pending(struct nfc_shdlc *shdlc)
+static void llc_shdlc_requeue_ack_pending(struct llc_shdlc *shdlc)
 {
 	struct sk_buff *skb;
 
 	pr_debug("ns reset to %d\n", shdlc->dnr);
 
 	while ((skb = skb_dequeue_tail(&shdlc->ack_pending_q))) {
-		skb_pull(skb, 2);	/* remove len+control */
-		skb_trim(skb, skb->len - 2);	/* remove crc */
+		skb_pull(skb, 1);	/* remove control field */
 		skb_queue_head(&shdlc->send_q, skb);
 	}
 	shdlc->ns = shdlc->dnr;
 }
 
-static void nfc_shdlc_rcv_rej(struct nfc_shdlc *shdlc, int y_nr)
+static void llc_shdlc_rcv_rej(struct llc_shdlc *shdlc, int y_nr)
 {
 	struct sk_buff *skb;
 
 	pr_debug("remote asks retransmition from frame %d\n", y_nr);
 
-	if (nfc_shdlc_x_lteq_y_lt_z(shdlc->dnr, y_nr, shdlc->ns)) {
+	if (llc_shdlc_x_lteq_y_lt_z(shdlc->dnr, y_nr, shdlc->ns)) {
 		if (shdlc->t2_active) {
 			del_timer_sync(&shdlc->t2_timer);
 			shdlc->t2_active = false;
@@ -289,12 +316,12 @@ static void nfc_shdlc_rcv_rej(struct nfc_shdlc *shdlc, int y_nr)
 			}
 		}
 
-		nfc_shdlc_requeue_ack_pending(shdlc);
+		llc_shdlc_requeue_ack_pending(shdlc);
 	}
 }
 
 /* See spec RR:10.8.3 REJ:10.8.4 */
-static void nfc_shdlc_rcv_s_frame(struct nfc_shdlc *shdlc,
+static void llc_shdlc_rcv_s_frame(struct llc_shdlc *shdlc,
 				  enum sframe_type s_frame_type, int nr)
 {
 	struct sk_buff *skb;
@@ -304,21 +331,21 @@ static void nfc_shdlc_rcv_s_frame(struct nfc_shdlc *shdlc,
 
 	switch (s_frame_type) {
 	case S_FRAME_RR:
-		nfc_shdlc_rcv_ack(shdlc, nr);
+		llc_shdlc_rcv_ack(shdlc, nr);
 		if (shdlc->rnr == true) {	/* see SHDLC 10.7.7 */
 			shdlc->rnr = false;
 			if (shdlc->send_q.qlen == 0) {
-				skb = nfc_shdlc_alloc_skb(shdlc, 0);
+				skb = llc_shdlc_alloc_skb(shdlc, 0);
 				if (skb)
 					skb_queue_tail(&shdlc->send_q, skb);
 			}
 		}
 		break;
 	case S_FRAME_REJ:
-		nfc_shdlc_rcv_rej(shdlc, nr);
+		llc_shdlc_rcv_rej(shdlc, nr);
 		break;
 	case S_FRAME_RNR:
-		nfc_shdlc_rcv_ack(shdlc, nr);
+		llc_shdlc_rcv_ack(shdlc, nr);
 		shdlc->rnr = true;
 		break;
 	default:
@@ -326,7 +353,7 @@ static void nfc_shdlc_rcv_s_frame(struct nfc_shdlc *shdlc,
 	}
 }
 
-static void nfc_shdlc_connect_complete(struct nfc_shdlc *shdlc, int r)
+static void llc_shdlc_connect_complete(struct llc_shdlc *shdlc, int r)
 {
 	pr_debug("result=%d\n", r);
 
@@ -337,7 +364,7 @@ static void nfc_shdlc_connect_complete(struct nfc_shdlc *shdlc, int r)
 		shdlc->nr = 0;
 		shdlc->dnr = 0;
 
-		shdlc->state = SHDLC_CONNECTED;
+		shdlc->state = SHDLC_HALF_CONNECTED;
 	} else {
 		shdlc->state = SHDLC_DISCONNECTED;
 	}
@@ -347,36 +374,36 @@ static void nfc_shdlc_connect_complete(struct nfc_shdlc *shdlc, int r)
 	wake_up(shdlc->connect_wq);
 }
 
-static int nfc_shdlc_connect_initiate(struct nfc_shdlc *shdlc)
+static int llc_shdlc_connect_initiate(struct llc_shdlc *shdlc)
 {
 	struct sk_buff *skb;
 
 	pr_debug("\n");
 
-	skb = nfc_shdlc_alloc_skb(shdlc, 2);
+	skb = llc_shdlc_alloc_skb(shdlc, 2);
 	if (skb == NULL)
 		return -ENOMEM;
 
 	*skb_put(skb, 1) = SHDLC_MAX_WINDOW;
 	*skb_put(skb, 1) = SHDLC_SREJ_SUPPORT ? 1 : 0;
 
-	return nfc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET);
+	return llc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET);
 }
 
-static int nfc_shdlc_connect_send_ua(struct nfc_shdlc *shdlc)
+static int llc_shdlc_connect_send_ua(struct llc_shdlc *shdlc)
 {
 	struct sk_buff *skb;
 
 	pr_debug("\n");
 
-	skb = nfc_shdlc_alloc_skb(shdlc, 0);
+	skb = llc_shdlc_alloc_skb(shdlc, 0);
 	if (skb == NULL)
 		return -ENOMEM;
 
-	return nfc_shdlc_send_u_frame(shdlc, skb, U_FRAME_UA);
+	return llc_shdlc_send_u_frame(shdlc, skb, U_FRAME_UA);
 }
 
-static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc,
+static void llc_shdlc_rcv_u_frame(struct llc_shdlc *shdlc,
 				  struct sk_buff *skb,
 				  enum uframe_modifier u_frame_modifier)
 {
@@ -388,8 +415,13 @@ static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc,
 
 	switch (u_frame_modifier) {
 	case U_FRAME_RSET:
-		if (shdlc->state == SHDLC_NEGOCIATING) {
-			/* we sent RSET, but chip wants to negociate */
+		switch (shdlc->state) {
+		case SHDLC_NEGOTIATING:
+		case SHDLC_CONNECTING:
+			/*
+			 * We sent RSET, but chip wants to negociate or we
+			 * got RSET before we managed to send out our.
+			 */
 			if (skb->len > 0)
 				w = skb->data[0];
 
@@ -401,22 +433,34 @@ static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc,
 			    (SHDLC_SREJ_SUPPORT || (srej_support == false))) {
 				shdlc->w = w;
 				shdlc->srej_support = srej_support;
-				r = nfc_shdlc_connect_send_ua(shdlc);
-				nfc_shdlc_connect_complete(shdlc, r);
+				r = llc_shdlc_connect_send_ua(shdlc);
+				llc_shdlc_connect_complete(shdlc, r);
 			}
-		} else if (shdlc->state == SHDLC_CONNECTED) {
+			break;
+		case SHDLC_HALF_CONNECTED:
+			/*
+			 * Chip resent RSET due to its timeout - Ignote it
+			 * as we already sent UA.
+			 */
+			break;
+		case SHDLC_CONNECTED:
 			/*
 			 * Chip wants to reset link. This is unexpected and
 			 * unsupported.
 			 */
 			shdlc->hard_fault = -ECONNRESET;
+			break;
+		default:
+			break;
 		}
 		break;
 	case U_FRAME_UA:
 		if ((shdlc->state == SHDLC_CONNECTING &&
 		     shdlc->connect_tries > 0) ||
-		    (shdlc->state == SHDLC_NEGOCIATING))
-			nfc_shdlc_connect_complete(shdlc, 0);
+		    (shdlc->state == SHDLC_NEGOTIATING)) {
+			llc_shdlc_connect_complete(shdlc, 0);
+			shdlc->state = SHDLC_CONNECTED;
+		}
 		break;
 	default:
 		break;
@@ -425,7 +469,7 @@ static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc,
 	kfree_skb(skb);
 }
 
-static void nfc_shdlc_handle_rcv_queue(struct nfc_shdlc *shdlc)
+static void llc_shdlc_handle_rcv_queue(struct llc_shdlc *shdlc)
 {
 	struct sk_buff *skb;
 	u8 control;
@@ -443,19 +487,25 @@ static void nfc_shdlc_handle_rcv_queue(struct nfc_shdlc *shdlc)
 		switch (control & SHDLC_CONTROL_HEAD_MASK) {
 		case SHDLC_CONTROL_HEAD_I:
 		case SHDLC_CONTROL_HEAD_I2:
+			if (shdlc->state == SHDLC_HALF_CONNECTED)
+				shdlc->state = SHDLC_CONNECTED;
+
 			ns = (control & SHDLC_CONTROL_NS_MASK) >> 3;
 			nr = control & SHDLC_CONTROL_NR_MASK;
-			nfc_shdlc_rcv_i_frame(shdlc, skb, ns, nr);
+			llc_shdlc_rcv_i_frame(shdlc, skb, ns, nr);
 			break;
 		case SHDLC_CONTROL_HEAD_S:
+			if (shdlc->state == SHDLC_HALF_CONNECTED)
+				shdlc->state = SHDLC_CONNECTED;
+
 			s_frame_type = (control & SHDLC_CONTROL_TYPE_MASK) >> 3;
 			nr = control & SHDLC_CONTROL_NR_MASK;
-			nfc_shdlc_rcv_s_frame(shdlc, s_frame_type, nr);
+			llc_shdlc_rcv_s_frame(shdlc, s_frame_type, nr);
 			kfree_skb(skb);
 			break;
 		case SHDLC_CONTROL_HEAD_U:
 			u_frame_modifier = control & SHDLC_CONTROL_M_MASK;
-			nfc_shdlc_rcv_u_frame(shdlc, skb, u_frame_modifier);
+			llc_shdlc_rcv_u_frame(shdlc, skb, u_frame_modifier);
 			break;
 		default:
 			pr_err("UNKNOWN Control=%d\n", control);
@@ -465,7 +515,7 @@ static void nfc_shdlc_handle_rcv_queue(struct nfc_shdlc *shdlc)
 	}
 }
 
-static int nfc_shdlc_w_used(int ns, int dnr)
+static int llc_shdlc_w_used(int ns, int dnr)
 {
 	int unack_count;
 
@@ -478,7 +528,7 @@ static int nfc_shdlc_w_used(int ns, int dnr)
 }
 
 /* Send frames according to algorithm at spec:10.8.1 */
-static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc)
+static void llc_shdlc_handle_send_queue(struct llc_shdlc *shdlc)
 {
 	struct sk_buff *skb;
 	int r;
@@ -489,7 +539,7 @@ static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc)
 		    ("sendQlen=%d ns=%d dnr=%d rnr=%s w_room=%d unackQlen=%d\n",
 		     shdlc->send_q.qlen, shdlc->ns, shdlc->dnr,
 		     shdlc->rnr == false ? "false" : "true",
-		     shdlc->w - nfc_shdlc_w_used(shdlc->ns, shdlc->dnr),
+		     shdlc->w - llc_shdlc_w_used(shdlc->ns, shdlc->dnr),
 		     shdlc->ack_pending_q.qlen);
 
 	while (shdlc->send_q.qlen && shdlc->ack_pending_q.qlen < shdlc->w &&
@@ -508,11 +558,9 @@ static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc)
 
 		pr_debug("Sending I-Frame %d, waiting to rcv %d\n", shdlc->ns,
 			 shdlc->nr);
-	/*	SHDLC_DUMP_SKB("shdlc frame written", skb); */
-
-		nfc_shdlc_add_len_crc(skb);
+		SHDLC_DUMP_SKB("shdlc frame written", skb);
 
-		r = shdlc->ops->xmit(shdlc, skb);
+		r = shdlc->xmit_to_drv(shdlc->hdev, skb);
 		if (r < 0) {
 			shdlc->hard_fault = r;
 			break;
@@ -534,36 +582,36 @@ static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc)
 	}
 }
 
-static void nfc_shdlc_connect_timeout(unsigned long data)
+static void llc_shdlc_connect_timeout(unsigned long data)
 {
-	struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
+	struct llc_shdlc *shdlc = (struct llc_shdlc *)data;
 
 	pr_debug("\n");
 
-	queue_work(shdlc->sm_wq, &shdlc->sm_work);
+	queue_work(system_nrt_wq, &shdlc->sm_work);
 }
 
-static void nfc_shdlc_t1_timeout(unsigned long data)
+static void llc_shdlc_t1_timeout(unsigned long data)
 {
-	struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
+	struct llc_shdlc *shdlc = (struct llc_shdlc *)data;
 
 	pr_debug("SoftIRQ: need to send ack\n");
 
-	queue_work(shdlc->sm_wq, &shdlc->sm_work);
+	queue_work(system_nrt_wq, &shdlc->sm_work);
 }
 
-static void nfc_shdlc_t2_timeout(unsigned long data)
+static void llc_shdlc_t2_timeout(unsigned long data)
 {
-	struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
+	struct llc_shdlc *shdlc = (struct llc_shdlc *)data;
 
 	pr_debug("SoftIRQ: need to retransmit\n");
 
-	queue_work(shdlc->sm_wq, &shdlc->sm_work);
+	queue_work(system_nrt_wq, &shdlc->sm_work);
 }
 
-static void nfc_shdlc_sm_work(struct work_struct *work)
+static void llc_shdlc_sm_work(struct work_struct *work)
 {
-	struct nfc_shdlc *shdlc = container_of(work, struct nfc_shdlc, sm_work);
+	struct llc_shdlc *shdlc = container_of(work, struct llc_shdlc, sm_work);
 	int r;
 
 	pr_debug("\n");
@@ -578,46 +626,47 @@ static void nfc_shdlc_sm_work(struct work_struct *work)
 		break;
 	case SHDLC_CONNECTING:
 		if (shdlc->hard_fault) {
-			nfc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
+			llc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
 			break;
 		}
 
 		if (shdlc->connect_tries++ < 5)
-			r = nfc_shdlc_connect_initiate(shdlc);
+			r = llc_shdlc_connect_initiate(shdlc);
 		else
 			r = -ETIME;
 		if (r < 0)
-			nfc_shdlc_connect_complete(shdlc, r);
+			llc_shdlc_connect_complete(shdlc, r);
 		else {
 			mod_timer(&shdlc->connect_timer, jiffies +
 				  msecs_to_jiffies(SHDLC_CONNECT_VALUE_MS));
 
-			shdlc->state = SHDLC_NEGOCIATING;
+			shdlc->state = SHDLC_NEGOTIATING;
 		}
 		break;
-	case SHDLC_NEGOCIATING:
+	case SHDLC_NEGOTIATING:
 		if (timer_pending(&shdlc->connect_timer) == 0) {
 			shdlc->state = SHDLC_CONNECTING;
-			queue_work(shdlc->sm_wq, &shdlc->sm_work);
+			queue_work(system_nrt_wq, &shdlc->sm_work);
 		}
 
-		nfc_shdlc_handle_rcv_queue(shdlc);
+		llc_shdlc_handle_rcv_queue(shdlc);
 
 		if (shdlc->hard_fault) {
-			nfc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
+			llc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
 			break;
 		}
 		break;
+	case SHDLC_HALF_CONNECTED:
 	case SHDLC_CONNECTED:
-		nfc_shdlc_handle_rcv_queue(shdlc);
-		nfc_shdlc_handle_send_queue(shdlc);
+		llc_shdlc_handle_rcv_queue(shdlc);
+		llc_shdlc_handle_send_queue(shdlc);
 
 		if (shdlc->t1_active && timer_pending(&shdlc->t1_timer) == 0) {
 			pr_debug
 			    ("Handle T1(send ack) elapsed (T1 now inactive)\n");
 
 			shdlc->t1_active = false;
-			r = nfc_shdlc_send_s_frame(shdlc, S_FRAME_RR,
+			r = llc_shdlc_send_s_frame(shdlc, S_FRAME_RR,
 						   shdlc->nr);
 			if (r < 0)
 				shdlc->hard_fault = r;
@@ -629,12 +678,12 @@ static void nfc_shdlc_sm_work(struct work_struct *work)
 
 			shdlc->t2_active = false;
 
-			nfc_shdlc_requeue_ack_pending(shdlc);
-			nfc_shdlc_handle_send_queue(shdlc);
+			llc_shdlc_requeue_ack_pending(shdlc);
+			llc_shdlc_handle_send_queue(shdlc);
 		}
 
 		if (shdlc->hard_fault) {
-			nfc_hci_driver_failure(shdlc->hdev, shdlc->hard_fault);
+			shdlc->llc_failure(shdlc->hdev, shdlc->hard_fault);
 		}
 		break;
 	default:
@@ -647,7 +696,7 @@ static void nfc_shdlc_sm_work(struct work_struct *work)
  * Called from syscall context to establish shdlc link. Sleeps until
  * link is ready or failure.
  */
-static int nfc_shdlc_connect(struct nfc_shdlc *shdlc)
+static int llc_shdlc_connect(struct llc_shdlc *shdlc)
 {
 	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(connect_wq);
 
@@ -662,14 +711,14 @@ static int nfc_shdlc_connect(struct nfc_shdlc *shdlc)
 
 	mutex_unlock(&shdlc->state_mutex);
 
-	queue_work(shdlc->sm_wq, &shdlc->sm_work);
+	queue_work(system_nrt_wq, &shdlc->sm_work);
 
 	wait_event(connect_wq, shdlc->connect_result != 1);
 
 	return shdlc->connect_result;
 }
 
-static void nfc_shdlc_disconnect(struct nfc_shdlc *shdlc)
+static void llc_shdlc_disconnect(struct llc_shdlc *shdlc)
 {
 	pr_debug("\n");
 
@@ -679,7 +728,7 @@ static void nfc_shdlc_disconnect(struct nfc_shdlc *shdlc)
 
 	mutex_unlock(&shdlc->state_mutex);
 
-	queue_work(shdlc->sm_wq, &shdlc->sm_work);
+	queue_work(system_nrt_wq, &shdlc->sm_work);
 }
 
 /*
@@ -687,7 +736,7 @@ static void nfc_shdlc_disconnect(struct nfc_shdlc *shdlc)
  * skb contains only LLC header and payload.
  * If skb == NULL, it is a notification that the link below is dead.
  */
-void nfc_shdlc_recv_frame(struct nfc_shdlc *shdlc, struct sk_buff *skb)
+static void llc_shdlc_recv_frame(struct llc_shdlc *shdlc, struct sk_buff *skb)
 {
 	if (skb == NULL) {
 		pr_err("NULL Frame -> link is dead\n");
@@ -697,176 +746,37 @@ void nfc_shdlc_recv_frame(struct nfc_shdlc *shdlc, struct sk_buff *skb)
 		skb_queue_tail(&shdlc->rcv_q, skb);
 	}
 
-	queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-EXPORT_SYMBOL(nfc_shdlc_recv_frame);
-
-static int nfc_shdlc_open(struct nfc_hci_dev *hdev)
-{
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-	int r;
-
-	pr_debug("\n");
-
-	if (shdlc->ops->open) {
-		r = shdlc->ops->open(shdlc);
-		if (r < 0)
-			return r;
-	}
-
-	r = nfc_shdlc_connect(shdlc);
-	if (r < 0 && shdlc->ops->close)
-		shdlc->ops->close(shdlc);
-
-	return r;
-}
-
-static void nfc_shdlc_close(struct nfc_hci_dev *hdev)
-{
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
-	pr_debug("\n");
-
-	nfc_shdlc_disconnect(shdlc);
-
-	if (shdlc->ops->close)
-		shdlc->ops->close(shdlc);
+	queue_work(system_nrt_wq, &shdlc->sm_work);
 }
 
-static int nfc_shdlc_hci_ready(struct nfc_hci_dev *hdev)
+static void *llc_shdlc_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
+			    rcv_to_hci_t rcv_to_hci, int tx_headroom,
+			    int tx_tailroom, int *rx_headroom, int *rx_tailroom,
+			    llc_failure_t llc_failure)
 {
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-	int r = 0;
-
-	pr_debug("\n");
+	struct llc_shdlc *shdlc;
 
-	if (shdlc->ops->hci_ready)
-		r = shdlc->ops->hci_ready(shdlc);
-
-	return r;
-}
-
-static int nfc_shdlc_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
-{
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
-	SHDLC_DUMP_SKB("queuing HCP packet to shdlc", skb);
-
-	skb_queue_tail(&shdlc->send_q, skb);
+	*rx_headroom = SHDLC_LLC_HEAD_ROOM;
+	*rx_tailroom = 0;
 
-	queue_work(shdlc->sm_wq, &shdlc->sm_work);
-
-	return 0;
-}
-
-static int nfc_shdlc_start_poll(struct nfc_hci_dev *hdev,
-				u32 im_protocols, u32 tm_protocols)
-{
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
-	pr_debug("\n");
-
-	if (shdlc->ops->start_poll)
-		return shdlc->ops->start_poll(shdlc,
-					      im_protocols, tm_protocols);
-
-	return 0;
-}
-
-static int nfc_shdlc_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
-				      struct nfc_target *target)
-{
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
-	if (shdlc->ops->target_from_gate)
-		return shdlc->ops->target_from_gate(shdlc, gate, target);
-
-	return -EPERM;
-}
-
-static int nfc_shdlc_complete_target_discovered(struct nfc_hci_dev *hdev,
-						u8 gate,
-						struct nfc_target *target)
-{
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
-	pr_debug("\n");
-
-	if (shdlc->ops->complete_target_discovered)
-		return shdlc->ops->complete_target_discovered(shdlc, gate,
-							      target);
-
-	return 0;
-}
-
-static int nfc_shdlc_data_exchange(struct nfc_hci_dev *hdev,
-				   struct nfc_target *target,
-				   struct sk_buff *skb,
-				   struct sk_buff **res_skb)
-{
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
-	if (shdlc->ops->data_exchange)
-		return shdlc->ops->data_exchange(shdlc, target, skb, res_skb);
-
-	return -EPERM;
-}
-
-static int nfc_shdlc_check_presence(struct nfc_hci_dev *hdev,
-				    struct nfc_target *target)
-{
-	struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
-	if (shdlc->ops->check_presence)
-		return shdlc->ops->check_presence(shdlc, target);
-
-	return 0;
-}
-
-static struct nfc_hci_ops shdlc_ops = {
-	.open = nfc_shdlc_open,
-	.close = nfc_shdlc_close,
-	.hci_ready = nfc_shdlc_hci_ready,
-	.xmit = nfc_shdlc_xmit,
-	.start_poll = nfc_shdlc_start_poll,
-	.target_from_gate = nfc_shdlc_target_from_gate,
-	.complete_target_discovered = nfc_shdlc_complete_target_discovered,
-	.data_exchange = nfc_shdlc_data_exchange,
-	.check_presence = nfc_shdlc_check_presence,
-};
-
-struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops,
-				     struct nfc_hci_init_data *init_data,
-				     u32 protocols,
-				     int tx_headroom, int tx_tailroom,
-				     int max_link_payload, const char *devname)
-{
-	struct nfc_shdlc *shdlc;
-	int r;
-	char name[32];
-
-	if (ops->xmit == NULL)
-		return NULL;
-
-	shdlc = kzalloc(sizeof(struct nfc_shdlc), GFP_KERNEL);
+	shdlc = kzalloc(sizeof(struct llc_shdlc), GFP_KERNEL);
 	if (shdlc == NULL)
 		return NULL;
 
 	mutex_init(&shdlc->state_mutex);
-	shdlc->ops = ops;
 	shdlc->state = SHDLC_DISCONNECTED;
 
 	init_timer(&shdlc->connect_timer);
 	shdlc->connect_timer.data = (unsigned long)shdlc;
-	shdlc->connect_timer.function = nfc_shdlc_connect_timeout;
+	shdlc->connect_timer.function = llc_shdlc_connect_timeout;
 
 	init_timer(&shdlc->t1_timer);
 	shdlc->t1_timer.data = (unsigned long)shdlc;
-	shdlc->t1_timer.function = nfc_shdlc_t1_timeout;
+	shdlc->t1_timer.function = llc_shdlc_t1_timeout;
 
 	init_timer(&shdlc->t2_timer);
 	shdlc->t2_timer.data = (unsigned long)shdlc;
-	shdlc->t2_timer.function = nfc_shdlc_t2_timeout;
+	shdlc->t2_timer.function = llc_shdlc_t2_timeout;
 
 	shdlc->w = SHDLC_MAX_WINDOW;
 	shdlc->srej_support = SHDLC_SREJ_SUPPORT;
@@ -875,77 +785,73 @@ struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops,
 	skb_queue_head_init(&shdlc->send_q);
 	skb_queue_head_init(&shdlc->ack_pending_q);
 
-	INIT_WORK(&shdlc->sm_work, nfc_shdlc_sm_work);
-	snprintf(name, sizeof(name), "%s_shdlc_sm_wq", devname);
-	shdlc->sm_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
-				       WQ_MEM_RECLAIM, 1);
-	if (shdlc->sm_wq == NULL)
-		goto err_allocwq;
+	INIT_WORK(&shdlc->sm_work, llc_shdlc_sm_work);
 
-	shdlc->client_headroom = tx_headroom;
-	shdlc->client_tailroom = tx_tailroom;
-
-	shdlc->hdev = nfc_hci_allocate_device(&shdlc_ops, init_data, protocols,
-					      tx_headroom + SHDLC_LLC_HEAD_ROOM,
-					      tx_tailroom + SHDLC_LLC_TAIL_ROOM,
-					      max_link_payload);
-	if (shdlc->hdev == NULL)
-		goto err_allocdev;
-
-	nfc_hci_set_clientdata(shdlc->hdev, shdlc);
-
-	r = nfc_hci_register_device(shdlc->hdev);
-	if (r < 0)
-		goto err_regdev;
+	shdlc->hdev = hdev;
+	shdlc->xmit_to_drv = xmit_to_drv;
+	shdlc->rcv_to_hci = rcv_to_hci;
+	shdlc->tx_headroom = tx_headroom;
+	shdlc->tx_tailroom = tx_tailroom;
+	shdlc->llc_failure = llc_failure;
 
 	return shdlc;
+}
 
-err_regdev:
-	nfc_hci_free_device(shdlc->hdev);
+static void llc_shdlc_deinit(struct nfc_llc *llc)
+{
+	struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
 
-err_allocdev:
-	destroy_workqueue(shdlc->sm_wq);
+	skb_queue_purge(&shdlc->rcv_q);
+	skb_queue_purge(&shdlc->send_q);
+	skb_queue_purge(&shdlc->ack_pending_q);
 
-err_allocwq:
 	kfree(shdlc);
-
-	return NULL;
 }
-EXPORT_SYMBOL(nfc_shdlc_allocate);
 
-void nfc_shdlc_free(struct nfc_shdlc *shdlc)
+static int llc_shdlc_start(struct nfc_llc *llc)
 {
-	pr_debug("\n");
+	struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
 
-	nfc_hci_unregister_device(shdlc->hdev);
-	nfc_hci_free_device(shdlc->hdev);
+	return llc_shdlc_connect(shdlc);
+}
 
-	destroy_workqueue(shdlc->sm_wq);
+static int llc_shdlc_stop(struct nfc_llc *llc)
+{
+	struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
 
-	skb_queue_purge(&shdlc->rcv_q);
-	skb_queue_purge(&shdlc->send_q);
-	skb_queue_purge(&shdlc->ack_pending_q);
+	llc_shdlc_disconnect(shdlc);
 
-	kfree(shdlc);
+	return 0;
 }
-EXPORT_SYMBOL(nfc_shdlc_free);
 
-void nfc_shdlc_set_clientdata(struct nfc_shdlc *shdlc, void *clientdata)
+static void llc_shdlc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
 {
-	pr_debug("\n");
+	struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
 
-	shdlc->clientdata = clientdata;
+	llc_shdlc_recv_frame(shdlc, skb);
 }
-EXPORT_SYMBOL(nfc_shdlc_set_clientdata);
 
-void *nfc_shdlc_get_clientdata(struct nfc_shdlc *shdlc)
+static int llc_shdlc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
 {
-	return shdlc->clientdata;
+	struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
+
+	skb_queue_tail(&shdlc->send_q, skb);
+
+	queue_work(system_nrt_wq, &shdlc->sm_work);
+
+	return 0;
 }
-EXPORT_SYMBOL(nfc_shdlc_get_clientdata);
 
-struct nfc_hci_dev *nfc_shdlc_get_hci_dev(struct nfc_shdlc *shdlc)
+static struct nfc_llc_ops llc_shdlc_ops = {
+	.init = llc_shdlc_init,
+	.deinit = llc_shdlc_deinit,
+	.start = llc_shdlc_start,
+	.stop = llc_shdlc_stop,
+	.rcv_from_drv = llc_shdlc_rcv_from_drv,
+	.xmit_from_hci = llc_shdlc_xmit_from_hci,
+};
+
+int nfc_llc_shdlc_register(void)
 {
-	return shdlc->hdev;
+	return nfc_llc_register(LLC_SHDLC_NAME, &llc_shdlc_ops);
 }
-EXPORT_SYMBOL(nfc_shdlc_get_hci_dev);
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 82f0f75..90ef4a1 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -114,9 +114,9 @@ static void local_release(struct kref *ref)
 	nfc_llcp_socket_release(local, false);
 	del_timer_sync(&local->link_timer);
 	skb_queue_purge(&local->tx_queue);
-	destroy_workqueue(local->tx_wq);
-	destroy_workqueue(local->rx_wq);
-	destroy_workqueue(local->timeout_wq);
+	cancel_work_sync(&local->tx_work);
+	cancel_work_sync(&local->rx_work);
+	cancel_work_sync(&local->timeout_work);
 	kfree_skb(local->rx_pending);
 	kfree(local);
 }
@@ -181,7 +181,7 @@ static void nfc_llcp_symm_timer(unsigned long data)
 
 	pr_err("SYMM timeout\n");
 
-	queue_work(local->timeout_wq, &local->timeout_work);
+	queue_work(system_nrt_wq, &local->timeout_work);
 }
 
 struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
@@ -426,6 +426,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 	u8 *miux_tlv, miux_length;
 	__be16 miux;
 	u8 gb_len = 0;
+	int ret = 0;
 
 	version = LLCP_VERSION_11;
 	version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version,
@@ -450,8 +451,8 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 	gb_len += ARRAY_SIZE(llcp_magic);
 
 	if (gb_len > NFC_MAX_GT_LEN) {
-		kfree(version_tlv);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	gb_cur = local->gb;
@@ -471,12 +472,15 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 	memcpy(gb_cur, miux_tlv, miux_length);
 	gb_cur += miux_length;
 
+	local->gb_len = gb_len;
+
+out:
 	kfree(version_tlv);
 	kfree(lto_tlv);
+	kfree(wks_tlv);
+	kfree(miux_tlv);
 
-	local->gb_len = gb_len;
-
-	return 0;
+	return ret;
 }
 
 u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len)
@@ -1052,7 +1056,7 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 
 	}
 
-	queue_work(local->tx_wq, &local->tx_work);
+	queue_work(system_nrt_wq, &local->tx_work);
 	kfree_skb(local->rx_pending);
 	local->rx_pending = NULL;
 
@@ -1071,7 +1075,7 @@ void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
 
 	local->rx_pending = skb_get(skb);
 	del_timer(&local->link_timer);
-	queue_work(local->rx_wq, &local->rx_work);
+	queue_work(system_nrt_wq, &local->rx_work);
 
 	return;
 }
@@ -1086,7 +1090,7 @@ int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
 
 	local->rx_pending = skb_get(skb);
 	del_timer(&local->link_timer);
-	queue_work(local->rx_wq, &local->rx_work);
+	queue_work(system_nrt_wq, &local->rx_work);
 
 	return 0;
 }
@@ -1121,7 +1125,7 @@ void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
 	if (rf_mode == NFC_RF_INITIATOR) {
 		pr_debug("Queueing Tx work\n");
 
-		queue_work(local->tx_wq, &local->tx_work);
+		queue_work(system_nrt_wq, &local->tx_work);
 	} else {
 		mod_timer(&local->link_timer,
 			  jiffies + msecs_to_jiffies(local->remote_lto));
@@ -1130,10 +1134,7 @@ void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
 
 int nfc_llcp_register_device(struct nfc_dev *ndev)
 {
-	struct device *dev = &ndev->dev;
 	struct nfc_llcp_local *local;
-	char name[32];
-	int err;
 
 	local = kzalloc(sizeof(struct nfc_llcp_local), GFP_KERNEL);
 	if (local == NULL)
@@ -1149,38 +1150,11 @@ int nfc_llcp_register_device(struct nfc_dev *ndev)
 
 	skb_queue_head_init(&local->tx_queue);
 	INIT_WORK(&local->tx_work, nfc_llcp_tx_work);
-	snprintf(name, sizeof(name), "%s_llcp_tx_wq", dev_name(dev));
-	local->tx_wq =
-		alloc_workqueue(name,
-				WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
-				1);
-	if (local->tx_wq == NULL) {
-		err = -ENOMEM;
-		goto err_local;
-	}
 
 	local->rx_pending = NULL;
 	INIT_WORK(&local->rx_work, nfc_llcp_rx_work);
-	snprintf(name, sizeof(name), "%s_llcp_rx_wq", dev_name(dev));
-	local->rx_wq =
-		alloc_workqueue(name,
-				WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
-				1);
-	if (local->rx_wq == NULL) {
-		err = -ENOMEM;
-		goto err_tx_wq;
-	}
 
 	INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work);
-	snprintf(name, sizeof(name), "%s_llcp_timeout_wq", dev_name(dev));
-	local->timeout_wq =
-		alloc_workqueue(name,
-				WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
-				1);
-	if (local->timeout_wq == NULL) {
-		err = -ENOMEM;
-		goto err_rx_wq;
-	}
 
 	local->sockets.lock = __RW_LOCK_UNLOCKED(local->sockets.lock);
 	local->connecting_sockets.lock = __RW_LOCK_UNLOCKED(local->connecting_sockets.lock);
@@ -1193,17 +1167,6 @@ int nfc_llcp_register_device(struct nfc_dev *ndev)
 	list_add(&llcp_devices, &local->list);
 
 	return 0;
-
-err_rx_wq:
-	destroy_workqueue(local->rx_wq);
-
-err_tx_wq:
-	destroy_workqueue(local->tx_wq);
-
-err_local:
-	kfree(local);
-
-	return 0;
 }
 
 void nfc_llcp_unregister_device(struct nfc_dev *dev)
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 83b8bba..af395c9 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -56,12 +56,9 @@ struct nfc_llcp_local {
 
 	struct timer_list link_timer;
 	struct sk_buff_head tx_queue;
-	struct workqueue_struct	*tx_wq;
 	struct work_struct	 tx_work;
-	struct workqueue_struct	*rx_wq;
 	struct work_struct	 rx_work;
 	struct sk_buff *rx_pending;
-	struct workqueue_struct	*timeout_wq;
 	struct work_struct	 timeout_work;
 
 	u32 target_idx;
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index ddeb9aa..6e188d4 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -300,9 +300,6 @@ static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr,
 	pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx,
 		 llcp_sock->dsap, llcp_sock->ssap);
 
-	if (llcp_sock == NULL || llcp_sock->dev == NULL)
-		return -EBADFD;
-
 	uaddr->sa_family = AF_NFC;
 
 	*len = sizeof(struct sockaddr_nfc_llcp);
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index f81efe1..acf9abb 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -176,6 +176,27 @@ static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt)
 		     (1 + ((*num) * sizeof(struct disc_map_config))), &cmd);
 }
 
+struct nci_set_config_param {
+	__u8	id;
+	size_t	len;
+	__u8	*val;
+};
+
+static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt)
+{
+	struct nci_set_config_param *param = (struct nci_set_config_param *)opt;
+	struct nci_core_set_config_cmd cmd;
+
+	BUG_ON(param->len > NCI_MAX_PARAM_LEN);
+
+	cmd.num_params = 1;
+	cmd.param.id = param->id;
+	cmd.param.len = param->len;
+	memcpy(cmd.param.val, param->val, param->len);
+
+	nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd);
+}
+
 static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
 {
 	struct nci_rf_disc_cmd cmd;
@@ -388,6 +409,32 @@ static int nci_dev_down(struct nfc_dev *nfc_dev)
 	return nci_close_device(ndev);
 }
 
+static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
+{
+	struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
+	struct nci_set_config_param param;
+	__u8 local_gb[NFC_MAX_GT_LEN];
+	int i, rc = 0;
+
+	param.val = nfc_get_local_general_bytes(nfc_dev, &param.len);
+	if ((param.val == NULL) || (param.len == 0))
+		return rc;
+
+	if (param.len > NCI_MAX_PARAM_LEN)
+		return -EINVAL;
+
+	for (i = 0; i < param.len; i++)
+		local_gb[param.len-1-i] = param.val[i];
+
+	param.id = NCI_PN_ATR_REQ_GEN_BYTES;
+	param.val = local_gb;
+
+	rc = nci_request(ndev, nci_set_config_req, (unsigned long)&param,
+			 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
+
+	return rc;
+}
+
 static int nci_start_poll(struct nfc_dev *nfc_dev,
 			  __u32 im_protocols, __u32 tm_protocols)
 {
@@ -415,6 +462,14 @@ static int nci_start_poll(struct nfc_dev *nfc_dev,
 			return -EBUSY;
 	}
 
+	if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+		rc = nci_set_local_general_bytes(nfc_dev);
+		if (rc) {
+			pr_err("failed to set local general bytes\n");
+			return rc;
+		}
+	}
+
 	rc = nci_request(ndev, nci_rf_discover_req, im_protocols,
 			 msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
 
@@ -509,7 +564,7 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev,
 {
 	struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
 
-	pr_debug("target_idx %d\n", target->idx);
+	pr_debug("entry\n");
 
 	if (!ndev->target_active_prot) {
 		pr_err("unable to deactivate target, no active target\n");
@@ -524,6 +579,38 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev,
 	}
 }
 
+
+static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
+			   __u8 comm_mode, __u8 *gb, size_t gb_len)
+{
+	struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
+	int rc;
+
+	pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
+
+	rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
+	if (rc)
+		return rc;
+
+	rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
+					  ndev->remote_gb_len);
+	if (!rc)
+		rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
+					NFC_RF_INITIATOR);
+
+	return rc;
+}
+
+static int nci_dep_link_down(struct nfc_dev *nfc_dev)
+{
+	pr_debug("entry\n");
+
+	nci_deactivate_target(nfc_dev, NULL);
+
+	return 0;
+}
+
+
 static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
 			  struct sk_buff *skb,
 			  data_exchange_cb_t cb, void *cb_context)
@@ -557,6 +644,8 @@ static struct nfc_ops nci_nfc_ops = {
 	.dev_down = nci_dev_down,
 	.start_poll = nci_start_poll,
 	.stop_poll = nci_stop_poll,
+	.dep_link_up = nci_dep_link_up,
+	.dep_link_down = nci_dep_link_down,
 	.activate_target = nci_activate_target,
 	.deactivate_target = nci_deactivate_target,
 	.im_transceive = nci_transceive,
diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index af7a93b..b2aa98e 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -176,6 +176,8 @@ static int nci_add_new_protocol(struct nci_dev *ndev,
 			protocol = NFC_PROTO_ISO14443_B_MASK;
 	else if (rf_protocol == NCI_RF_PROTOCOL_T3T)
 		protocol = NFC_PROTO_FELICA_MASK;
+	else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP)
+		protocol = NFC_PROTO_NFC_DEP_MASK;
 	else
 		protocol = 0;
 
@@ -361,6 +363,33 @@ static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev,
 	return NCI_STATUS_OK;
 }
 
+static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev,
+			struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
+{
+	struct activation_params_poll_nfc_dep *poll;
+	int i;
+
+	switch (ntf->activation_rf_tech_and_mode) {
+	case NCI_NFC_A_PASSIVE_POLL_MODE:
+	case NCI_NFC_F_PASSIVE_POLL_MODE:
+		poll = &ntf->activation_params.poll_nfc_dep;
+		poll->atr_res_len = min_t(__u8, *data++, 63);
+		pr_debug("atr_res_len %d\n", poll->atr_res_len);
+		if (poll->atr_res_len > 0) {
+			for (i = 0; i < poll->atr_res_len; i++)
+				poll->atr_res[poll->atr_res_len-1-i] = data[i];
+		}
+		break;
+
+	default:
+		pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
+		       ntf->activation_rf_tech_and_mode);
+		return NCI_STATUS_RF_PROTOCOL_ERROR;
+	}
+
+	return NCI_STATUS_OK;
+}
+
 static void nci_target_auto_activated(struct nci_dev *ndev,
 				      struct nci_rf_intf_activated_ntf *ntf)
 {
@@ -454,6 +483,11 @@ static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
 								    &ntf, data);
 			break;
 
+		case NCI_RF_INTERFACE_NFC_DEP:
+			err = nci_extract_activation_params_nfc_dep(ndev,
+								    &ntf, data);
+			break;
+
 		case NCI_RF_INTERFACE_FRAME:
 			/* no activation params */
 			break;
@@ -473,6 +507,24 @@ exit:
 
 		/* set the available credits to initial value */
 		atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
+
+		/* store general bytes to be reported later in dep_link_up */
+		if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) {
+			ndev->remote_gb_len = 0;
+
+			if (ntf.activation_params_len > 0) {
+				/* ATR_RES general bytes at offset 15 */
+				ndev->remote_gb_len = min_t(__u8,
+					(ntf.activation_params
+					.poll_nfc_dep.atr_res_len
+					- NFC_ATR_RES_GT_OFFSET),
+					NFC_MAX_GT_LEN);
+				memcpy(ndev->remote_gb,
+				       (ntf.activation_params.poll_nfc_dep
+				       .atr_res + NFC_ATR_RES_GT_OFFSET),
+				       ndev->remote_gb_len);
+			}
+		}
 	}
 
 	if (atomic_read(&ndev->state) == NCI_DISCOVERY) {
diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
index 3003c33..dd072f3 100644
--- a/net/nfc/nci/rsp.c
+++ b/net/nfc/nci/rsp.c
@@ -119,6 +119,16 @@ exit:
 	nci_req_complete(ndev, rsp_1->status);
 }
 
+static void nci_core_set_config_rsp_packet(struct nci_dev *ndev,
+					   struct sk_buff *skb)
+{
+	struct nci_core_set_config_rsp *rsp = (void *) skb->data;
+
+	pr_debug("status 0x%x\n", rsp->status);
+
+	nci_req_complete(ndev, rsp->status);
+}
+
 static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
 				       struct sk_buff *skb)
 {
@@ -194,6 +204,10 @@ void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
 		nci_core_init_rsp_packet(ndev, skb);
 		break;
 
+	case NCI_OP_CORE_SET_CONFIG_RSP:
+		nci_core_set_config_rsp_packet(ndev, skb);
+		break;
+
 	case NCI_OP_RF_DISCOVER_MAP_RSP:
 		nci_rf_disc_map_rsp_packet(ndev, skb);
 		break;