1 files changed, 805 insertions, 0 deletions

diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
new file mode 100644
index 000000000..f8b20cddd
--- /dev/null
+++ b/net/nfc/nci/ntf.c
@@ -0,0 +1,805 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  The NFC Controller Interface is the communication protocol between an
+ *  NFC Controller (NFCC) and a Device Host (DH).
+ *
+ *  Copyright (C) 2014 Marvell International Ltd.
+ *  Copyright (C) 2011 Texas Instruments, Inc.
+ *
+ *  Written by Ilan Elias <ilane@ti.com>
+ *
+ *  Acknowledgements:
+ *  This file is based on hci_event.c, which was written
+ *  by Maxim Krasnyansky.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
+
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <linux/skbuff.h>
+
+#include "../nfc.h"
+#include <net/nfc/nci.h>
+#include <net/nfc/nci_core.h>
+#include <linux/nfc.h>
+
+/* Handle NCI Notification packets */
+
+static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev,
+					     struct sk_buff *skb)
+{
+	struct nci_core_conn_credit_ntf *ntf = (void *) skb->data;
+	struct nci_conn_info	*conn_info;
+	int i;
+
+	pr_debug("num_entries %d\n", ntf->num_entries);
+
+	if (ntf->num_entries > NCI_MAX_NUM_CONN)
+		ntf->num_entries = NCI_MAX_NUM_CONN;
+
+	/* update the credits */
+	for (i = 0; i < ntf->num_entries; i++) {
+		ntf->conn_entries[i].conn_id =
+			nci_conn_id(&ntf->conn_entries[i].conn_id);
+
+		pr_debug("entry[%d]: conn_id %d, credits %d\n",
+			 i, ntf->conn_entries[i].conn_id,
+			 ntf->conn_entries[i].credits);
+
+		conn_info = nci_get_conn_info_by_conn_id(ndev,
+							 ntf->conn_entries[i].conn_id);
+		if (!conn_info)
+			return;
+
+		atomic_add(ntf->conn_entries[i].credits,
+			   &conn_info->credits_cnt);
+	}
+
+	/* trigger the next tx */
+	if (!skb_queue_empty(&ndev->tx_q))
+		queue_work(ndev->tx_wq, &ndev->tx_work);
+}
+
+static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev,
+					      struct sk_buff *skb)
+{
+	__u8 status = skb->data[0];
+
+	pr_debug("status 0x%x\n", status);
+
+	if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
+		/* Activation failed, so complete the request
+		   (the state remains the same) */
+		nci_req_complete(ndev, status);
+	}
+}
+
+static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev,
+						struct sk_buff *skb)
+{
+	struct nci_core_intf_error_ntf *ntf = (void *) skb->data;
+
+	ntf->conn_id = nci_conn_id(&ntf->conn_id);
+
+	pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id);
+
+	/* complete the data exchange transaction, if exists */
+	if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
+		nci_data_exchange_complete(ndev, NULL, ntf->conn_id, -EIO);
+}
+
+static __u8 *nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev,
+			struct rf_tech_specific_params_nfca_poll *nfca_poll,
+						     __u8 *data)
+{
+	nfca_poll->sens_res = __le16_to_cpu(*((__le16 *)data));
+	data += 2;
+
+	nfca_poll->nfcid1_len = min_t(__u8, *data++, NFC_NFCID1_MAXSIZE);
+
+	pr_debug("sens_res 0x%x, nfcid1_len %d\n",
+		 nfca_poll->sens_res, nfca_poll->nfcid1_len);
+
+	memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len);
+	data += nfca_poll->nfcid1_len;
+
+	nfca_poll->sel_res_len = *data++;
+
+	if (nfca_poll->sel_res_len != 0)
+		nfca_poll->sel_res = *data++;
+
+	pr_debug("sel_res_len %d, sel_res 0x%x\n",
+		 nfca_poll->sel_res_len,
+		 nfca_poll->sel_res);
+
+	return data;
+}
+
+static __u8 *nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev,
+			struct rf_tech_specific_params_nfcb_poll *nfcb_poll,
+						     __u8 *data)
+{
+	nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE);
+
+	pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len);
+
+	memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len);
+	data += nfcb_poll->sensb_res_len;
+
+	return data;
+}
+
+static __u8 *nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev,
+			struct rf_tech_specific_params_nfcf_poll *nfcf_poll,
+						     __u8 *data)
+{
+	nfcf_poll->bit_rate = *data++;
+	nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE);
+
+	pr_debug("bit_rate %d, sensf_res_len %d\n",
+		 nfcf_poll->bit_rate, nfcf_poll->sensf_res_len);
+
+	memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len);
+	data += nfcf_poll->sensf_res_len;
+
+	return data;
+}
+
+static __u8 *nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev,
+			struct rf_tech_specific_params_nfcv_poll *nfcv_poll,
+						     __u8 *data)
+{
+	++data;
+	nfcv_poll->dsfid = *data++;
+	memcpy(nfcv_poll->uid, data, NFC_ISO15693_UID_MAXSIZE);
+	data += NFC_ISO15693_UID_MAXSIZE;
+	return data;
+}
+
+static __u8 *nci_extract_rf_params_nfcf_passive_listen(struct nci_dev *ndev,
+			struct rf_tech_specific_params_nfcf_listen *nfcf_listen,
+						     __u8 *data)
+{
+	nfcf_listen->local_nfcid2_len = min_t(__u8, *data++,
+					      NFC_NFCID2_MAXSIZE);
+	memcpy(nfcf_listen->local_nfcid2, data, nfcf_listen->local_nfcid2_len);
+	data += nfcf_listen->local_nfcid2_len;
+
+	return data;
+}
+
+static __u32 nci_get_prop_rf_protocol(struct nci_dev *ndev, __u8 rf_protocol)
+{
+	if (ndev->ops->get_rfprotocol)
+		return ndev->ops->get_rfprotocol(ndev, rf_protocol);
+	return 0;
+}
+
+static int nci_add_new_protocol(struct nci_dev *ndev,
+				struct nfc_target *target,
+				__u8 rf_protocol,
+				__u8 rf_tech_and_mode,
+				void *params)
+{
+	struct rf_tech_specific_params_nfca_poll *nfca_poll;
+	struct rf_tech_specific_params_nfcb_poll *nfcb_poll;
+	struct rf_tech_specific_params_nfcf_poll *nfcf_poll;
+	struct rf_tech_specific_params_nfcv_poll *nfcv_poll;
+	__u32 protocol;
+
+	if (rf_protocol == NCI_RF_PROTOCOL_T1T)
+		protocol = NFC_PROTO_JEWEL_MASK;
+	else if (rf_protocol == NCI_RF_PROTOCOL_T2T)
+		protocol = NFC_PROTO_MIFARE_MASK;
+	else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP)
+		if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE)
+			protocol = NFC_PROTO_ISO14443_MASK;
+		else
+			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 if (rf_protocol == NCI_RF_PROTOCOL_T5T)
+		protocol = NFC_PROTO_ISO15693_MASK;
+	else
+		protocol = nci_get_prop_rf_protocol(ndev, rf_protocol);
+
+	if (!(protocol & ndev->poll_prots)) {
+		pr_err("the target found does not have the desired protocol\n");
+		return -EPROTO;
+	}
+
+	if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) {
+		nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params;
+
+		target->sens_res = nfca_poll->sens_res;
+		target->sel_res = nfca_poll->sel_res;
+		target->nfcid1_len = nfca_poll->nfcid1_len;
+		if (target->nfcid1_len > ARRAY_SIZE(target->nfcid1))
+			return -EPROTO;
+		if (target->nfcid1_len > 0) {
+			memcpy(target->nfcid1, nfca_poll->nfcid1,
+			       target->nfcid1_len);
+		}
+	} else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) {
+		nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params;
+
+		target->sensb_res_len = nfcb_poll->sensb_res_len;
+		if (target->sensb_res_len > ARRAY_SIZE(target->sensb_res))
+			return -EPROTO;
+		if (target->sensb_res_len > 0) {
+			memcpy(target->sensb_res, nfcb_poll->sensb_res,
+			       target->sensb_res_len);
+		}
+	} else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) {
+		nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params;
+
+		target->sensf_res_len = nfcf_poll->sensf_res_len;
+		if (target->sensf_res_len > ARRAY_SIZE(target->sensf_res))
+			return -EPROTO;
+		if (target->sensf_res_len > 0) {
+			memcpy(target->sensf_res, nfcf_poll->sensf_res,
+			       target->sensf_res_len);
+		}
+	} else if (rf_tech_and_mode == NCI_NFC_V_PASSIVE_POLL_MODE) {
+		nfcv_poll = (struct rf_tech_specific_params_nfcv_poll *)params;
+
+		target->is_iso15693 = 1;
+		target->iso15693_dsfid = nfcv_poll->dsfid;
+		memcpy(target->iso15693_uid, nfcv_poll->uid, NFC_ISO15693_UID_MAXSIZE);
+	} else {
+		pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode);
+		return -EPROTO;
+	}
+
+	target->supported_protocols |= protocol;
+
+	pr_debug("protocol 0x%x\n", protocol);
+
+	return 0;
+}
+
+static void nci_add_new_target(struct nci_dev *ndev,
+			       struct nci_rf_discover_ntf *ntf)
+{
+	struct nfc_target *target;
+	int i, rc;
+
+	for (i = 0; i < ndev->n_targets; i++) {
+		target = &ndev->targets[i];
+		if (target->logical_idx == ntf->rf_discovery_id) {
+			/* This target already exists, add the new protocol */
+			nci_add_new_protocol(ndev, target, ntf->rf_protocol,
+					     ntf->rf_tech_and_mode,
+					     &ntf->rf_tech_specific_params);
+			return;
+		}
+	}
+
+	/* This is a new target, check if we've enough room */
+	if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) {
+		pr_debug("not enough room, ignoring new target...\n");
+		return;
+	}
+
+	target = &ndev->targets[ndev->n_targets];
+
+	rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
+				  ntf->rf_tech_and_mode,
+				  &ntf->rf_tech_specific_params);
+	if (!rc) {
+		target->logical_idx = ntf->rf_discovery_id;
+		ndev->n_targets++;
+
+		pr_debug("logical idx %d, n_targets %d\n", target->logical_idx,
+			 ndev->n_targets);
+	}
+}
+
+void nci_clear_target_list(struct nci_dev *ndev)
+{
+	memset(ndev->targets, 0,
+	       (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS));
+
+	ndev->n_targets = 0;
+}
+
+static void nci_rf_discover_ntf_packet(struct nci_dev *ndev,
+				       struct sk_buff *skb)
+{
+	struct nci_rf_discover_ntf ntf;
+	__u8 *data = skb->data;
+	bool add_target = true;
+
+	ntf.rf_discovery_id = *data++;
+	ntf.rf_protocol = *data++;
+	ntf.rf_tech_and_mode = *data++;
+	ntf.rf_tech_specific_params_len = *data++;
+
+	pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
+	pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
+	pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode);
+	pr_debug("rf_tech_specific_params_len %d\n",
+		 ntf.rf_tech_specific_params_len);
+
+	if (ntf.rf_tech_specific_params_len > 0) {
+		switch (ntf.rf_tech_and_mode) {
+		case NCI_NFC_A_PASSIVE_POLL_MODE:
+			data = nci_extract_rf_params_nfca_passive_poll(ndev,
+				&(ntf.rf_tech_specific_params.nfca_poll), data);
+			break;
+
+		case NCI_NFC_B_PASSIVE_POLL_MODE:
+			data = nci_extract_rf_params_nfcb_passive_poll(ndev,
+				&(ntf.rf_tech_specific_params.nfcb_poll), data);
+			break;
+
+		case NCI_NFC_F_PASSIVE_POLL_MODE:
+			data = nci_extract_rf_params_nfcf_passive_poll(ndev,
+				&(ntf.rf_tech_specific_params.nfcf_poll), data);
+			break;
+
+		case NCI_NFC_V_PASSIVE_POLL_MODE:
+			data = nci_extract_rf_params_nfcv_passive_poll(ndev,
+				&(ntf.rf_tech_specific_params.nfcv_poll), data);
+			break;
+
+		default:
+			pr_err("unsupported rf_tech_and_mode 0x%x\n",
+			       ntf.rf_tech_and_mode);
+			data += ntf.rf_tech_specific_params_len;
+			add_target = false;
+		}
+	}
+
+	ntf.ntf_type = *data++;
+	pr_debug("ntf_type %d\n", ntf.ntf_type);
+
+	if (add_target == true)
+		nci_add_new_target(ndev, &ntf);
+
+	if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) {
+		atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES);
+	} else {
+		atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
+		nfc_targets_found(ndev->nfc_dev, ndev->targets,
+				  ndev->n_targets);
+	}
+}
+
+static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev,
+			struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
+{
+	struct activation_params_nfca_poll_iso_dep *nfca_poll;
+	struct activation_params_nfcb_poll_iso_dep *nfcb_poll;
+
+	switch (ntf->activation_rf_tech_and_mode) {
+	case NCI_NFC_A_PASSIVE_POLL_MODE:
+		nfca_poll = &ntf->activation_params.nfca_poll_iso_dep;
+		nfca_poll->rats_res_len = min_t(__u8, *data++, 20);
+		pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len);
+		if (nfca_poll->rats_res_len > 0) {
+			memcpy(nfca_poll->rats_res,
+			       data, nfca_poll->rats_res_len);
+		}
+		break;
+
+	case NCI_NFC_B_PASSIVE_POLL_MODE:
+		nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep;
+		nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50);
+		pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len);
+		if (nfcb_poll->attrib_res_len > 0) {
+			memcpy(nfcb_poll->attrib_res,
+			       data, nfcb_poll->attrib_res_len);
+		}
+		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 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;
+	struct activation_params_listen_nfc_dep *listen;
+
+	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++,
+					  NFC_ATR_RES_MAXSIZE - 2);
+		pr_debug("atr_res_len %d\n", poll->atr_res_len);
+		if (poll->atr_res_len > 0)
+			memcpy(poll->atr_res, data, poll->atr_res_len);
+		break;
+
+	case NCI_NFC_A_PASSIVE_LISTEN_MODE:
+	case NCI_NFC_F_PASSIVE_LISTEN_MODE:
+		listen = &ntf->activation_params.listen_nfc_dep;
+		listen->atr_req_len = min_t(__u8, *data++,
+					    NFC_ATR_REQ_MAXSIZE - 2);
+		pr_debug("atr_req_len %d\n", listen->atr_req_len);
+		if (listen->atr_req_len > 0)
+			memcpy(listen->atr_req, data, listen->atr_req_len);
+		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)
+{
+	struct nfc_target *target;
+	int rc;
+
+	target = &ndev->targets[ndev->n_targets];
+
+	rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
+				  ntf->activation_rf_tech_and_mode,
+				  &ntf->rf_tech_specific_params);
+	if (rc)
+		return;
+
+	target->logical_idx = ntf->rf_discovery_id;
+	ndev->n_targets++;
+
+	pr_debug("logical idx %d, n_targets %d\n",
+		 target->logical_idx, ndev->n_targets);
+
+	nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets);
+}
+
+static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev,
+		struct nci_rf_intf_activated_ntf *ntf)
+{
+	ndev->remote_gb_len = 0;
+
+	if (ntf->activation_params_len <= 0)
+		return NCI_STATUS_OK;
+
+	switch (ntf->activation_rf_tech_and_mode) {
+	case NCI_NFC_A_PASSIVE_POLL_MODE:
+	case NCI_NFC_F_PASSIVE_POLL_MODE:
+		ndev->remote_gb_len = min_t(__u8,
+			(ntf->activation_params.poll_nfc_dep.atr_res_len
+						- NFC_ATR_RES_GT_OFFSET),
+			NFC_ATR_RES_GB_MAXSIZE);
+		memcpy(ndev->remote_gb,
+		       (ntf->activation_params.poll_nfc_dep.atr_res
+						+ NFC_ATR_RES_GT_OFFSET),
+		       ndev->remote_gb_len);
+		break;
+
+	case NCI_NFC_A_PASSIVE_LISTEN_MODE:
+	case NCI_NFC_F_PASSIVE_LISTEN_MODE:
+		ndev->remote_gb_len = min_t(__u8,
+			(ntf->activation_params.listen_nfc_dep.atr_req_len
+						- NFC_ATR_REQ_GT_OFFSET),
+			NFC_ATR_REQ_GB_MAXSIZE);
+		memcpy(ndev->remote_gb,
+		       (ntf->activation_params.listen_nfc_dep.atr_req
+						+ NFC_ATR_REQ_GT_OFFSET),
+		       ndev->remote_gb_len);
+		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_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
+					     struct sk_buff *skb)
+{
+	struct nci_conn_info    *conn_info;
+	struct nci_rf_intf_activated_ntf ntf;
+	__u8 *data = skb->data;
+	int err = NCI_STATUS_OK;
+
+	ntf.rf_discovery_id = *data++;
+	ntf.rf_interface = *data++;
+	ntf.rf_protocol = *data++;
+	ntf.activation_rf_tech_and_mode = *data++;
+	ntf.max_data_pkt_payload_size = *data++;
+	ntf.initial_num_credits = *data++;
+	ntf.rf_tech_specific_params_len = *data++;
+
+	pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
+	pr_debug("rf_interface 0x%x\n", ntf.rf_interface);
+	pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
+	pr_debug("activation_rf_tech_and_mode 0x%x\n",
+		 ntf.activation_rf_tech_and_mode);
+	pr_debug("max_data_pkt_payload_size 0x%x\n",
+		 ntf.max_data_pkt_payload_size);
+	pr_debug("initial_num_credits 0x%x\n",
+		 ntf.initial_num_credits);
+	pr_debug("rf_tech_specific_params_len %d\n",
+		 ntf.rf_tech_specific_params_len);
+
+	/* If this contains a value of 0x00 (NFCEE Direct RF
+	 * Interface) then all following parameters SHALL contain a
+	 * value of 0 and SHALL be ignored.
+	 */
+	if (ntf.rf_interface == NCI_RF_INTERFACE_NFCEE_DIRECT)
+		goto listen;
+
+	if (ntf.rf_tech_specific_params_len > 0) {
+		switch (ntf.activation_rf_tech_and_mode) {
+		case NCI_NFC_A_PASSIVE_POLL_MODE:
+			data = nci_extract_rf_params_nfca_passive_poll(ndev,
+				&(ntf.rf_tech_specific_params.nfca_poll), data);
+			break;
+
+		case NCI_NFC_B_PASSIVE_POLL_MODE:
+			data = nci_extract_rf_params_nfcb_passive_poll(ndev,
+				&(ntf.rf_tech_specific_params.nfcb_poll), data);
+			break;
+
+		case NCI_NFC_F_PASSIVE_POLL_MODE:
+			data = nci_extract_rf_params_nfcf_passive_poll(ndev,
+				&(ntf.rf_tech_specific_params.nfcf_poll), data);
+			break;
+
+		case NCI_NFC_V_PASSIVE_POLL_MODE:
+			data = nci_extract_rf_params_nfcv_passive_poll(ndev,
+				&(ntf.rf_tech_specific_params.nfcv_poll), data);
+			break;
+
+		case NCI_NFC_A_PASSIVE_LISTEN_MODE:
+			/* no RF technology specific parameters */
+			break;
+
+		case NCI_NFC_F_PASSIVE_LISTEN_MODE:
+			data = nci_extract_rf_params_nfcf_passive_listen(ndev,
+				&(ntf.rf_tech_specific_params.nfcf_listen),
+				data);
+			break;
+
+		default:
+			pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
+			       ntf.activation_rf_tech_and_mode);
+			err = NCI_STATUS_RF_PROTOCOL_ERROR;
+			goto exit;
+		}
+	}
+
+	ntf.data_exch_rf_tech_and_mode = *data++;
+	ntf.data_exch_tx_bit_rate = *data++;
+	ntf.data_exch_rx_bit_rate = *data++;
+	ntf.activation_params_len = *data++;
+
+	pr_debug("data_exch_rf_tech_and_mode 0x%x\n",
+		 ntf.data_exch_rf_tech_and_mode);
+	pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate);
+	pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate);
+	pr_debug("activation_params_len %d\n", ntf.activation_params_len);
+
+	if (ntf.activation_params_len > 0) {
+		switch (ntf.rf_interface) {
+		case NCI_RF_INTERFACE_ISO_DEP:
+			err = nci_extract_activation_params_iso_dep(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;
+
+		default:
+			pr_err("unsupported rf_interface 0x%x\n",
+			       ntf.rf_interface);
+			err = NCI_STATUS_RF_PROTOCOL_ERROR;
+			break;
+		}
+	}
+
+exit:
+	if (err == NCI_STATUS_OK) {
+		conn_info = ndev->rf_conn_info;
+		if (!conn_info)
+			return;
+
+		conn_info->max_pkt_payload_len = ntf.max_data_pkt_payload_size;
+		conn_info->initial_num_credits = ntf.initial_num_credits;
+
+		/* set the available credits to initial value */
+		atomic_set(&conn_info->credits_cnt,
+			   conn_info->initial_num_credits);
+
+		/* store general bytes to be reported later in dep_link_up */
+		if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) {
+			err = nci_store_general_bytes_nfc_dep(ndev, &ntf);
+			if (err != NCI_STATUS_OK)
+				pr_err("unable to store general bytes\n");
+		}
+	}
+
+	if (!(ntf.activation_rf_tech_and_mode & NCI_RF_TECH_MODE_LISTEN_MASK)) {
+		/* Poll mode */
+		if (atomic_read(&ndev->state) == NCI_DISCOVERY) {
+			/* A single target was found and activated
+			 * automatically */
+			atomic_set(&ndev->state, NCI_POLL_ACTIVE);
+			if (err == NCI_STATUS_OK)
+				nci_target_auto_activated(ndev, &ntf);
+		} else {	/* ndev->state == NCI_W4_HOST_SELECT */
+			/* A selected target was activated, so complete the
+			 * request */
+			atomic_set(&ndev->state, NCI_POLL_ACTIVE);
+			nci_req_complete(ndev, err);
+		}
+	} else {
+listen:
+		/* Listen mode */
+		atomic_set(&ndev->state, NCI_LISTEN_ACTIVE);
+		if (err == NCI_STATUS_OK &&
+		    ntf.rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) {
+			err = nfc_tm_activated(ndev->nfc_dev,
+					       NFC_PROTO_NFC_DEP_MASK,
+					       NFC_COMM_PASSIVE,
+					       ndev->remote_gb,
+					       ndev->remote_gb_len);
+			if (err != NCI_STATUS_OK)
+				pr_err("error when signaling tm activation\n");
+		}
+	}
+}
+
+static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
+					 struct sk_buff *skb)
+{
+	struct nci_conn_info    *conn_info;
+	struct nci_rf_deactivate_ntf *ntf = (void *) skb->data;
+
+	pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason);
+
+	conn_info = ndev->rf_conn_info;
+	if (!conn_info)
+		return;
+
+	/* drop tx data queue */
+	skb_queue_purge(&ndev->tx_q);
+
+	/* drop partial rx data packet */
+	if (ndev->rx_data_reassembly) {
+		kfree_skb(ndev->rx_data_reassembly);
+		ndev->rx_data_reassembly = NULL;
+	}
+
+	/* complete the data exchange transaction, if exists */
+	if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
+		nci_data_exchange_complete(ndev, NULL, NCI_STATIC_RF_CONN_ID,
+					   -EIO);
+
+	switch (ntf->type) {
+	case NCI_DEACTIVATE_TYPE_IDLE_MODE:
+		nci_clear_target_list(ndev);
+		atomic_set(&ndev->state, NCI_IDLE);
+		break;
+	case NCI_DEACTIVATE_TYPE_SLEEP_MODE:
+	case NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE:
+		atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
+		break;
+	case NCI_DEACTIVATE_TYPE_DISCOVERY:
+		nci_clear_target_list(ndev);
+		atomic_set(&ndev->state, NCI_DISCOVERY);
+		break;
+	}
+
+	nci_req_complete(ndev, NCI_STATUS_OK);
+}
+
+static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev,
+					  struct sk_buff *skb)
+{
+	u8 status = NCI_STATUS_OK;
+	struct nci_nfcee_discover_ntf   *nfcee_ntf =
+				(struct nci_nfcee_discover_ntf *)skb->data;
+
+	pr_debug("\n");
+
+	/* NFCForum NCI 9.2.1 HCI Network Specific Handling
+	 * If the NFCC supports the HCI Network, it SHALL return one,
+	 * and only one, NFCEE_DISCOVER_NTF with a Protocol type of
+	 * “HCI Access”, even if the HCI Network contains multiple NFCEEs.
+	 */
+	ndev->hci_dev->nfcee_id = nfcee_ntf->nfcee_id;
+	ndev->cur_params.id = nfcee_ntf->nfcee_id;
+
+	nci_req_complete(ndev, status);
+}
+
+static void nci_nfcee_action_ntf_packet(struct nci_dev *ndev,
+					struct sk_buff *skb)
+{
+	pr_debug("\n");
+}
+
+void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
+{
+	__u16 ntf_opcode = nci_opcode(skb->data);
+
+	pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
+		 nci_pbf(skb->data),
+		 nci_opcode_gid(ntf_opcode),
+		 nci_opcode_oid(ntf_opcode),
+		 nci_plen(skb->data));
+
+	/* strip the nci control header */
+	skb_pull(skb, NCI_CTRL_HDR_SIZE);
+
+	if (nci_opcode_gid(ntf_opcode) == NCI_GID_PROPRIETARY) {
+		if (nci_prop_ntf_packet(ndev, ntf_opcode, skb) == -ENOTSUPP) {
+			pr_err("unsupported ntf opcode 0x%x\n",
+			       ntf_opcode);
+		}
+
+		goto end;
+	}
+
+	switch (ntf_opcode) {
+	case NCI_OP_CORE_CONN_CREDITS_NTF:
+		nci_core_conn_credits_ntf_packet(ndev, skb);
+		break;
+
+	case NCI_OP_CORE_GENERIC_ERROR_NTF:
+		nci_core_generic_error_ntf_packet(ndev, skb);
+		break;
+
+	case NCI_OP_CORE_INTF_ERROR_NTF:
+		nci_core_conn_intf_error_ntf_packet(ndev, skb);
+		break;
+
+	case NCI_OP_RF_DISCOVER_NTF:
+		nci_rf_discover_ntf_packet(ndev, skb);
+		break;
+
+	case NCI_OP_RF_INTF_ACTIVATED_NTF:
+		nci_rf_intf_activated_ntf_packet(ndev, skb);
+		break;
+
+	case NCI_OP_RF_DEACTIVATE_NTF:
+		nci_rf_deactivate_ntf_packet(ndev, skb);
+		break;
+
+	case NCI_OP_NFCEE_DISCOVER_NTF:
+		nci_nfcee_discover_ntf_packet(ndev, skb);
+		break;
+
+	case NCI_OP_RF_NFCEE_ACTION_NTF:
+		nci_nfcee_action_ntf_packet(ndev, skb);
+		break;
+
+	default:
+		pr_err("unknown ntf opcode 0x%x\n", ntf_opcode);
+		break;
+	}
+
+	nci_core_ntf_packet(ndev, ntf_opcode, skb);
+end:
+	kfree_skb(skb);
+}