[deliverable/linux.git] / net / nfc / nci / ntf.c

/*
 *  The NFC Controller Interface is the communication protocol between an
 *  NFC Controller (NFCC) and a Device Host (DH).
 *
 *  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.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms 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
 *
 */

#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;
	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);

		if (ntf->conn_entries[i].conn_id == NCI_STATIC_RF_CONN_ID) {
			/* found static rf connection */
			atomic_add(ntf->conn_entries[i].credits,
				   &ndev->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, -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(*((__u16 *)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 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;
	__u32 protocol;

	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
		protocol = 0;

	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 > 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 > 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 > 0) {
			memcpy(target->sensf_res, nfcf_poll->sensf_res,
			       target->sensf_res_len);
		}
	} 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;

		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 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 void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
					     struct sk_buff *skb)
{
	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 (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;

		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_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) {
		ndev->max_data_pkt_payload_size = ntf.max_data_pkt_payload_size;
		ndev->initial_num_credits = ntf.initial_num_credits;

		/* set the available credits to initial value */
		atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
	}

	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);
	}
}

static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
					 struct sk_buff *skb)
{
	struct nci_rf_deactivate_ntf *ntf = (void *) skb->data;

	pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason);

	/* 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, -EIO);

	nci_clear_target_list(ndev);
	atomic_set(&ndev->state, NCI_IDLE);
	nci_req_complete(ndev, NCI_STATUS_OK);
}

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);

	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;

	default:
		pr_err("unknown ntf opcode 0x%x\n", ntf_opcode);
		break;
	}

	kfree_skb(skb);
}
Commit	Line	Data
6a2968aa IE	1	/*
	2	* The NFC Controller Interface is the communication protocol between an
	3	* NFC Controller (NFCC) and a Device Host (DH).
	4	*
	5	* Copyright (C) 2011 Texas Instruments, Inc.
	6	*
	7	* Written by Ilan Elias <ilane@ti.com>
	8	*
	9	* Acknowledgements:
	10	* This file is based on hci_event.c, which was written
	11	* by Maxim Krasnyansky.
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License version 2
	15	* as published by the Free Software Foundation
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	*/
	27
52858b51	28	#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
ed1e0ad8	29
6a2968aa IE	30	#include <linux/types.h>
	31	#include <linux/interrupt.h>
	32	#include <linux/bitops.h>
	33	#include <linux/skbuff.h>
	34
	35	#include "../nfc.h"
	36	#include <net/nfc/nci.h>
	37	#include <net/nfc/nci_core.h>
	38	#include <linux/nfc.h>
	39
	40	/* Handle NCI Notification packets */
	41
	42	static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev,
eb9bc6e9	43	struct sk_buff *skb)
6a2968aa IE	44	{
	45	struct nci_core_conn_credit_ntf ntf = (void ) skb->data;
	46	int i;
	47
24bf3304	48	pr_debug("num_entries %d\n", ntf->num_entries);
6a2968aa IE	49
	50	if (ntf->num_entries > NCI_MAX_NUM_CONN)
	51	ntf->num_entries = NCI_MAX_NUM_CONN;
	52
	53	/* update the credits */
	54	for (i = 0; i < ntf->num_entries; i++) {
637d85a7 IE	55	ntf->conn_entries[i].conn_id =
	56	nci_conn_id(&ntf->conn_entries[i].conn_id);
	57
20c239c1 JP	58	pr_debug("entry[%d]: conn_id %d, credits %d\n",
	59	i, ntf->conn_entries[i].conn_id,
	60	ntf->conn_entries[i].credits);
6a2968aa	61
e8c0dacd	62	if (ntf->conn_entries[i].conn_id == NCI_STATIC_RF_CONN_ID) {
6a2968aa IE	63	/* found static rf connection */
6a2968aa IE	64	atomic_add(ntf->conn_entries[i].credits,
eb9bc6e9	65	&ndev->credits_cnt);
6a2968aa IE	66	}
	67	}
	68
	69	/* trigger the next tx */
	70	if (!skb_queue_empty(&ndev->tx_q))
	71	queue_work(ndev->tx_wq, &ndev->tx_work);
	72	}
	73
019c4fba	74	static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev,
eb9bc6e9	75	struct sk_buff *skb)
019c4fba IE	76	{
	77	__u8 status = skb->data[0];
	78
	79	pr_debug("status 0x%x\n", status);
	80
	81	if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
	82	/* Activation failed, so complete the request
eb9bc6e9	83	(the state remains the same) */
019c4fba IE	84	nci_req_complete(ndev, status);
	85	}
	86	}
	87
004161cb IE	88	static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev,
	89	struct sk_buff *skb)
	90	{
	91	struct nci_core_intf_error_ntf ntf = (void ) skb->data;
	92
	93	ntf->conn_id = nci_conn_id(&ntf->conn_id);
	94
	95	pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id);
	96
	97	/* complete the data exchange transaction, if exists */
	98	if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
	99	nci_data_exchange_complete(ndev, NULL, -EIO);
	100	}
	101
e8c0dacd	102	static __u8 nci_extract_rf_params_nfca_passive_poll(struct nci_dev ndev,
019c4fba	103	struct rf_tech_specific_params_nfca_poll *nfca_poll,
eb9bc6e9	104	__u8 *data)
6a2968aa	105	{
6a2968aa IE	106	nfca_poll->sens_res = __le16_to_cpu(((__u16 )data));
	107	data += 2;
	108
67de956f	109	nfca_poll->nfcid1_len = min_t(__u8, *data++, NFC_NFCID1_MAXSIZE);
6a2968aa	110
20c239c1 JP	111	pr_debug("sens_res 0x%x, nfcid1_len %d\n",
20c239c1 JP	112	nfca_poll->sens_res, nfca_poll->nfcid1_len);
6a2968aa IE	113
	114	memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len);
	115	data += nfca_poll->nfcid1_len;
	116
	117	nfca_poll->sel_res_len = *data++;
	118
	119	if (nfca_poll->sel_res_len != 0)
	120	nfca_poll->sel_res = *data++;
	121
20c239c1 JP	122	pr_debug("sel_res_len %d, sel_res 0x%x\n",
	123	nfca_poll->sel_res_len,
	124	nfca_poll->sel_res);
e8c0dacd IE	125
	126	return data;
	127	}
	128
d5a2ca60	129	static __u8 nci_extract_rf_params_nfcb_passive_poll(struct nci_dev ndev,
019c4fba	130	struct rf_tech_specific_params_nfcb_poll *nfcb_poll,
eb9bc6e9	131	__u8 *data)
d5a2ca60	132	{
67de956f	133	nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE);
d5a2ca60 IE	134
	135	pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len);
	136
	137	memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len);
	138	data += nfcb_poll->sensb_res_len;
	139
	140	return data;
	141	}
	142
	143	static __u8 nci_extract_rf_params_nfcf_passive_poll(struct nci_dev ndev,
019c4fba	144	struct rf_tech_specific_params_nfcf_poll *nfcf_poll,
eb9bc6e9	145	__u8 *data)
d5a2ca60	146	{
d5a2ca60	147	nfcf_poll->bit_rate = *data++;
67de956f	148	nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE);
d5a2ca60 IE	149
d5a2ca60 IE	150	pr_debug("bit_rate %d, sensf_res_len %d\n",
eb9bc6e9	151	nfcf_poll->bit_rate, nfcf_poll->sensf_res_len);
d5a2ca60 IE	152
	153	memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len);
	154	data += nfcf_poll->sensf_res_len;
	155
	156	return data;
	157	}
	158
019c4fba IE	159	static int nci_add_new_protocol(struct nci_dev *ndev,
	160	struct nfc_target *target,
	161	__u8 rf_protocol,
	162	__u8 rf_tech_and_mode,
	163	void *params)
	164	{
	165	struct rf_tech_specific_params_nfca_poll *nfca_poll;
	166	struct rf_tech_specific_params_nfcb_poll *nfcb_poll;
	167	struct rf_tech_specific_params_nfcf_poll *nfcf_poll;
	168	__u32 protocol;
	169
	170	if (rf_protocol == NCI_RF_PROTOCOL_T2T)
	171	protocol = NFC_PROTO_MIFARE_MASK;
	172	else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP)
01d719a2 SO	173	if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE)
	174	protocol = NFC_PROTO_ISO14443_MASK;
	175	else
	176	protocol = NFC_PROTO_ISO14443_B_MASK;
019c4fba IE	177	else if (rf_protocol == NCI_RF_PROTOCOL_T3T)
	178	protocol = NFC_PROTO_FELICA_MASK;
	179	else
	180	protocol = 0;
	181
	182	if (!(protocol & ndev->poll_prots)) {
	183	pr_err("the target found does not have the desired protocol\n");
	184	return -EPROTO;
	185	}
	186
	187	if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) {
	188	nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params;
	189
	190	target->sens_res = nfca_poll->sens_res;
	191	target->sel_res = nfca_poll->sel_res;
	192	target->nfcid1_len = nfca_poll->nfcid1_len;
	193	if (target->nfcid1_len > 0) {
	194	memcpy(target->nfcid1, nfca_poll->nfcid1,
eb9bc6e9	195	target->nfcid1_len);
019c4fba IE	196	}
	197	} else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) {
	198	nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params;
	199
	200	target->sensb_res_len = nfcb_poll->sensb_res_len;
	201	if (target->sensb_res_len > 0) {
	202	memcpy(target->sensb_res, nfcb_poll->sensb_res,
eb9bc6e9	203	target->sensb_res_len);
019c4fba IE	204	}
	205	} else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) {
	206	nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params;
	207
	208	target->sensf_res_len = nfcf_poll->sensf_res_len;
	209	if (target->sensf_res_len > 0) {
	210	memcpy(target->sensf_res, nfcf_poll->sensf_res,
eb9bc6e9	211	target->sensf_res_len);
019c4fba IE	212	}
	213	} else {
	214	pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode);
	215	return -EPROTO;
	216	}
	217
	218	target->supported_protocols \|= protocol;
	219
	220	pr_debug("protocol 0x%x\n", protocol);
	221
	222	return 0;
	223	}
	224
	225	static void nci_add_new_target(struct nci_dev *ndev,
eb9bc6e9	226	struct nci_rf_discover_ntf *ntf)
019c4fba IE	227	{
	228	struct nfc_target *target;
	229	int i, rc;
	230
	231	for (i = 0; i < ndev->n_targets; i++) {
	232	target = &ndev->targets[i];
c4fbb651	233	if (target->logical_idx == ntf->rf_discovery_id) {
019c4fba IE	234	/* This target already exists, add the new protocol */
019c4fba IE	235	nci_add_new_protocol(ndev, target, ntf->rf_protocol,
eb9bc6e9 SO	236	ntf->rf_tech_and_mode,
eb9bc6e9 SO	237	&ntf->rf_tech_specific_params);
019c4fba IE	238	return;
	239	}
	240	}
	241
	242	/* This is a new target, check if we've enough room */
	243	if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) {
	244	pr_debug("not enough room, ignoring new target...\n");
	245	return;
	246	}
	247
	248	target = &ndev->targets[ndev->n_targets];
	249
	250	rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
eb9bc6e9 SO	251	ntf->rf_tech_and_mode,
eb9bc6e9 SO	252	&ntf->rf_tech_specific_params);
019c4fba	253	if (!rc) {
c4fbb651	254	target->logical_idx = ntf->rf_discovery_id;
019c4fba IE	255	ndev->n_targets++;
019c4fba IE	256
c4fbb651	257	pr_debug("logical idx %d, n_targets %d\n", target->logical_idx,
eb9bc6e9	258	ndev->n_targets);
019c4fba IE	259	}
	260	}
	261
	262	void nci_clear_target_list(struct nci_dev *ndev)
	263	{
	264	memset(ndev->targets, 0,
eb9bc6e9	265	(sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS));
019c4fba IE	266
	267	ndev->n_targets = 0;
	268	}
	269
	270	static void nci_rf_discover_ntf_packet(struct nci_dev *ndev,
eb9bc6e9	271	struct sk_buff *skb)
019c4fba IE	272	{
	273	struct nci_rf_discover_ntf ntf;
	274	__u8 *data = skb->data;
	275	bool add_target = true;
	276
	277	ntf.rf_discovery_id = *data++;
	278	ntf.rf_protocol = *data++;
	279	ntf.rf_tech_and_mode = *data++;
	280	ntf.rf_tech_specific_params_len = *data++;
	281
	282	pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
	283	pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
	284	pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode);
	285	pr_debug("rf_tech_specific_params_len %d\n",
eb9bc6e9	286	ntf.rf_tech_specific_params_len);
019c4fba IE	287
	288	if (ntf.rf_tech_specific_params_len > 0) {
	289	switch (ntf.rf_tech_and_mode) {
	290	case NCI_NFC_A_PASSIVE_POLL_MODE:
	291	data = nci_extract_rf_params_nfca_passive_poll(ndev,
	292	&(ntf.rf_tech_specific_params.nfca_poll), data);
	293	break;
	294
	295	case NCI_NFC_B_PASSIVE_POLL_MODE:
	296	data = nci_extract_rf_params_nfcb_passive_poll(ndev,
	297	&(ntf.rf_tech_specific_params.nfcb_poll), data);
	298	break;
	299
	300	case NCI_NFC_F_PASSIVE_POLL_MODE:
	301	data = nci_extract_rf_params_nfcf_passive_poll(ndev,
	302	&(ntf.rf_tech_specific_params.nfcf_poll), data);
	303	break;
	304
	305	default:
	306	pr_err("unsupported rf_tech_and_mode 0x%x\n",
	307	ntf.rf_tech_and_mode);
	308	data += ntf.rf_tech_specific_params_len;
	309	add_target = false;
	310	}
	311	}
	312
	313	ntf.ntf_type = *data++;
	314	pr_debug("ntf_type %d\n", ntf.ntf_type);
	315
	316	if (add_target == true)
	317	nci_add_new_target(ndev, &ntf);
	318
	319	if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) {
	320	atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES);
	321	} else {
	322	atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
	323	nfc_targets_found(ndev->nfc_dev, ndev->targets,
eb9bc6e9	324	ndev->n_targets);
019c4fba IE	325	}
	326	}
	327
e8c0dacd IE	328	static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev,
	329	struct nci_rf_intf_activated_ntf ntf, __u8 data)
	330	{
	331	struct activation_params_nfca_poll_iso_dep *nfca_poll;
d5a2ca60	332	struct activation_params_nfcb_poll_iso_dep *nfcb_poll;
e8c0dacd IE	333
	334	switch (ntf->activation_rf_tech_and_mode) {
	335	case NCI_NFC_A_PASSIVE_POLL_MODE:
	336	nfca_poll = &ntf->activation_params.nfca_poll_iso_dep;
67de956f	337	nfca_poll->rats_res_len = min_t(__u8, *data++, 20);
d5a2ca60	338	pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len);
e8c0dacd IE	339	if (nfca_poll->rats_res_len > 0) {
e8c0dacd IE	340	memcpy(nfca_poll->rats_res,
eb9bc6e9	341	data, nfca_poll->rats_res_len);
6a2968aa IE	342	}
	343	break;
	344
d5a2ca60 IE	345	case NCI_NFC_B_PASSIVE_POLL_MODE:
d5a2ca60 IE	346	nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep;
67de956f	347	nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50);
eb9bc6e9	348	pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len);
d5a2ca60 IE	349	if (nfcb_poll->attrib_res_len > 0) {
d5a2ca60 IE	350	memcpy(nfcb_poll->attrib_res,
eb9bc6e9	351	data, nfcb_poll->attrib_res_len);
d5a2ca60 IE	352	}
	353	break;
	354
6a2968aa	355	default:
ed1e0ad8 JP	356	pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
ed1e0ad8 JP	357	ntf->activation_rf_tech_and_mode);
019c4fba	358	return NCI_STATUS_RF_PROTOCOL_ERROR;
6a2968aa IE	359	}
6a2968aa IE	360
019c4fba	361	return NCI_STATUS_OK;
6a2968aa IE	362	}
6a2968aa IE	363
019c4fba	364	static void nci_target_auto_activated(struct nci_dev *ndev,
eb9bc6e9	365	struct nci_rf_intf_activated_ntf *ntf)
6a2968aa	366	{
019c4fba IE	367	struct nfc_target *target;
019c4fba IE	368	int rc;
6a2968aa	369
019c4fba	370	target = &ndev->targets[ndev->n_targets];
d5a2ca60	371
019c4fba	372	rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
eb9bc6e9 SO	373	ntf->activation_rf_tech_and_mode,
eb9bc6e9 SO	374	&ntf->rf_tech_specific_params);
019c4fba	375	if (rc)
6a2968aa	376	return;
6a2968aa	377
c4fbb651	378	target->logical_idx = ntf->rf_discovery_id;
019c4fba	379	ndev->n_targets++;
d5a2ca60	380
c4fbb651 SO	381	pr_debug("logical idx %d, n_targets %d\n",
c4fbb651 SO	382	target->logical_idx, ndev->n_targets);
637d85a7	383
019c4fba	384	nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets);
6a2968aa IE	385	}
6a2968aa IE	386
e8c0dacd	387	static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
eb9bc6e9	388	struct sk_buff *skb)
6a2968aa	389	{
e8c0dacd	390	struct nci_rf_intf_activated_ntf ntf;
6a2968aa	391	__u8 *data = skb->data;
019c4fba	392	int err = NCI_STATUS_OK;
6a2968aa	393
e8c0dacd	394	ntf.rf_discovery_id = *data++;
637d85a7	395	ntf.rf_interface = *data++;
6a2968aa	396	ntf.rf_protocol = *data++;
e8c0dacd	397	ntf.activation_rf_tech_and_mode = *data++;
637d85a7 IE	398	ntf.max_data_pkt_payload_size = *data++;
637d85a7 IE	399	ntf.initial_num_credits = *data++;
6a2968aa IE	400	ntf.rf_tech_specific_params_len = *data++;
6a2968aa IE	401
20c239c1	402	pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
637d85a7	403	pr_debug("rf_interface 0x%x\n", ntf.rf_interface);
20c239c1 JP	404	pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
	405	pr_debug("activation_rf_tech_and_mode 0x%x\n",
	406	ntf.activation_rf_tech_and_mode);
637d85a7 IE	407	pr_debug("max_data_pkt_payload_size 0x%x\n",
637d85a7 IE	408	ntf.max_data_pkt_payload_size);
eb9bc6e9 SO	409	pr_debug("initial_num_credits 0x%x\n",
eb9bc6e9 SO	410	ntf.initial_num_credits);
20c239c1 JP	411	pr_debug("rf_tech_specific_params_len %d\n",
20c239c1 JP	412	ntf.rf_tech_specific_params_len);
6a2968aa	413
e8c0dacd IE	414	if (ntf.rf_tech_specific_params_len > 0) {
	415	switch (ntf.activation_rf_tech_and_mode) {
	416	case NCI_NFC_A_PASSIVE_POLL_MODE:
	417	data = nci_extract_rf_params_nfca_passive_poll(ndev,
019c4fba	418	&(ntf.rf_tech_specific_params.nfca_poll), data);
e8c0dacd IE	419	break;
e8c0dacd IE	420
d5a2ca60 IE	421	case NCI_NFC_B_PASSIVE_POLL_MODE:
d5a2ca60 IE	422	data = nci_extract_rf_params_nfcb_passive_poll(ndev,
019c4fba	423	&(ntf.rf_tech_specific_params.nfcb_poll), data);
d5a2ca60 IE	424	break;
	425
	426	case NCI_NFC_F_PASSIVE_POLL_MODE:
	427	data = nci_extract_rf_params_nfcf_passive_poll(ndev,
019c4fba	428	&(ntf.rf_tech_specific_params.nfcf_poll), data);
d5a2ca60 IE	429	break;
d5a2ca60 IE	430
e8c0dacd	431	default:
ed1e0ad8 JP	432	pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
ed1e0ad8 JP	433	ntf.activation_rf_tech_and_mode);
019c4fba IE	434	err = NCI_STATUS_RF_PROTOCOL_ERROR;
019c4fba IE	435	goto exit;
e8c0dacd IE	436	}
e8c0dacd IE	437	}
6a2968aa	438
e8c0dacd IE	439	ntf.data_exch_rf_tech_and_mode = *data++;
	440	ntf.data_exch_tx_bit_rate = *data++;
	441	ntf.data_exch_rx_bit_rate = *data++;
	442	ntf.activation_params_len = *data++;
	443
20c239c1 JP	444	pr_debug("data_exch_rf_tech_and_mode 0x%x\n",
20c239c1 JP	445	ntf.data_exch_rf_tech_and_mode);
eb9bc6e9 SO	446	pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate);
	447	pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate);
	448	pr_debug("activation_params_len %d\n", ntf.activation_params_len);
e8c0dacd IE	449
e8c0dacd IE	450	if (ntf.activation_params_len > 0) {
637d85a7	451	switch (ntf.rf_interface) {
e8c0dacd IE	452	case NCI_RF_INTERFACE_ISO_DEP:
e8c0dacd IE	453	err = nci_extract_activation_params_iso_dep(ndev,
eb9bc6e9	454	&ntf, data);
e8c0dacd IE	455	break;
	456
	457	case NCI_RF_INTERFACE_FRAME:
	458	/* no activation params */
	459	break;
	460
	461	default:
637d85a7 IE	462	pr_err("unsupported rf_interface 0x%x\n",
637d85a7 IE	463	ntf.rf_interface);
019c4fba IE	464	err = NCI_STATUS_RF_PROTOCOL_ERROR;
019c4fba IE	465	break;
e8c0dacd	466	}
6a2968aa IE	467	}
6a2968aa IE	468
019c4fba IE	469	exit:
	470	if (err == NCI_STATUS_OK) {
	471	ndev->max_data_pkt_payload_size = ntf.max_data_pkt_payload_size;
	472	ndev->initial_num_credits = ntf.initial_num_credits;
	473
	474	/* set the available credits to initial value */
	475	atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
	476	}
	477
	478	if (atomic_read(&ndev->state) == NCI_DISCOVERY) {
	479	/* A single target was found and activated automatically */
	480	atomic_set(&ndev->state, NCI_POLL_ACTIVE);
	481	if (err == NCI_STATUS_OK)
	482	nci_target_auto_activated(ndev, &ntf);
	483	} else { /* ndev->state == NCI_W4_HOST_SELECT */
	484	/* A selected target was activated, so complete the request */
	485	atomic_set(&ndev->state, NCI_POLL_ACTIVE);
	486	nci_req_complete(ndev, err);
	487	}
6a2968aa IE	488	}
	489
	490	static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
eb9bc6e9	491	struct sk_buff *skb)
6a2968aa	492	{
e8c0dacd	493	struct nci_rf_deactivate_ntf ntf = (void ) skb->data;
6a2968aa	494
20c239c1	495	pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason);
6a2968aa	496
6a2968aa IE	497	/* drop tx data queue */
	498	skb_queue_purge(&ndev->tx_q);
	499
	500	/* drop partial rx data packet */
	501	if (ndev->rx_data_reassembly) {
	502	kfree_skb(ndev->rx_data_reassembly);
799030b7	503	ndev->rx_data_reassembly = NULL;
6a2968aa IE	504	}
	505
	506	/* complete the data exchange transaction, if exists */
38f04c6b	507	if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
6a2968aa	508	nci_data_exchange_complete(ndev, NULL, -EIO);
bd7e01bc	509
019c4fba IE	510	nci_clear_target_list(ndev);
019c4fba IE	511	atomic_set(&ndev->state, NCI_IDLE);
bd7e01bc	512	nci_req_complete(ndev, NCI_STATUS_OK);
6a2968aa IE	513	}
	514
	515	void nci_ntf_packet(struct nci_dev ndev, struct sk_buff skb)
	516	{
	517	__u16 ntf_opcode = nci_opcode(skb->data);
	518
20c239c1 JP	519	pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
	520	nci_pbf(skb->data),
	521	nci_opcode_gid(ntf_opcode),
	522	nci_opcode_oid(ntf_opcode),
	523	nci_plen(skb->data));
6a2968aa IE	524
	525	/* strip the nci control header */
	526	skb_pull(skb, NCI_CTRL_HDR_SIZE);
	527
	528	switch (ntf_opcode) {
	529	case NCI_OP_CORE_CONN_CREDITS_NTF:
	530	nci_core_conn_credits_ntf_packet(ndev, skb);
	531	break;
	532
019c4fba IE	533	case NCI_OP_CORE_GENERIC_ERROR_NTF:
	534	nci_core_generic_error_ntf_packet(ndev, skb);
	535	break;
	536
004161cb IE	537	case NCI_OP_CORE_INTF_ERROR_NTF:
	538	nci_core_conn_intf_error_ntf_packet(ndev, skb);
	539	break;
	540
019c4fba IE	541	case NCI_OP_RF_DISCOVER_NTF:
	542	nci_rf_discover_ntf_packet(ndev, skb);
	543	break;
	544
e8c0dacd IE	545	case NCI_OP_RF_INTF_ACTIVATED_NTF:
e8c0dacd IE	546	nci_rf_intf_activated_ntf_packet(ndev, skb);
6a2968aa IE	547	break;
	548
	549	case NCI_OP_RF_DEACTIVATE_NTF:
	550	nci_rf_deactivate_ntf_packet(ndev, skb);
	551	break;
	552
	553	default:
ed1e0ad8	554	pr_err("unknown ntf opcode 0x%x\n", ntf_opcode);
6a2968aa IE	555	break;
	556	}
	557
	558	kfree_skb(skb);
	559	}