2 * Copyright (C) 2012 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the
16 * Free Software Foundation, Inc.,
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #define pr_fmt(fmt) "hci: %s: " fmt, __func__
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/nfc.h>
27 #include <net/nfc/nfc.h>
28 #include <net/nfc/hci.h>
29 #include <net/nfc/llc.h>
33 /* Largest headroom needed for outgoing HCI commands */
34 #define HCI_CMDS_HEADROOM 1
36 static int nfc_hci_result_to_errno(u8 result)
41 case NFC_HCI_ANY_E_TIMEOUT:
48 static void nfc_hci_msg_tx_work(struct work_struct *work)
50 struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev,
56 mutex_lock(&hdev->msg_tx_mutex);
58 if (hdev->cmd_pending_msg) {
59 if (timer_pending(&hdev->cmd_timer) == 0) {
60 if (hdev->cmd_pending_msg->cb)
61 hdev->cmd_pending_msg->cb(hdev->
66 kfree(hdev->cmd_pending_msg);
67 hdev->cmd_pending_msg = NULL;
74 if (list_empty(&hdev->msg_tx_queue))
77 msg = list_first_entry(&hdev->msg_tx_queue, struct hci_msg, msg_l);
78 list_del(&msg->msg_l);
80 pr_debug("msg_tx_queue has a cmd to send\n");
81 while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) {
82 r = nfc_llc_xmit_from_hci(hdev->llc, skb);
85 skb_queue_purge(&msg->msg_frags);
87 msg->cb(msg->cb_context, NULL, r);
96 if (msg->wait_response == false) {
101 hdev->cmd_pending_msg = msg;
102 mod_timer(&hdev->cmd_timer, jiffies +
103 msecs_to_jiffies(hdev->cmd_pending_msg->completion_delay));
106 mutex_unlock(&hdev->msg_tx_mutex);
109 static void nfc_hci_msg_rx_work(struct work_struct *work)
111 struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev,
114 struct hcp_message *message;
119 while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) {
121 skb_pull(skb, NFC_HCI_HCP_PACKET_HEADER_LEN);
122 message = (struct hcp_message *)skb->data;
123 type = HCP_MSG_GET_TYPE(message->header);
124 instruction = HCP_MSG_GET_CMD(message->header);
125 skb_pull(skb, NFC_HCI_HCP_MESSAGE_HEADER_LEN);
127 nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, skb);
131 static void __nfc_hci_cmd_completion(struct nfc_hci_dev *hdev, int err,
134 del_timer_sync(&hdev->cmd_timer);
136 if (hdev->cmd_pending_msg->cb)
137 hdev->cmd_pending_msg->cb(hdev->cmd_pending_msg->cb_context,
142 kfree(hdev->cmd_pending_msg);
143 hdev->cmd_pending_msg = NULL;
145 schedule_work(&hdev->msg_tx_work);
148 void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
151 mutex_lock(&hdev->msg_tx_mutex);
153 if (hdev->cmd_pending_msg == NULL) {
158 __nfc_hci_cmd_completion(hdev, nfc_hci_result_to_errno(result), skb);
161 mutex_unlock(&hdev->msg_tx_mutex);
164 void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
170 static u32 nfc_hci_sak_to_protocol(u8 sak)
172 switch (NFC_HCI_TYPE_A_SEL_PROT(sak)) {
173 case NFC_HCI_TYPE_A_SEL_PROT_MIFARE:
174 return NFC_PROTO_MIFARE_MASK;
175 case NFC_HCI_TYPE_A_SEL_PROT_ISO14443:
176 return NFC_PROTO_ISO14443_MASK;
177 case NFC_HCI_TYPE_A_SEL_PROT_DEP:
178 return NFC_PROTO_NFC_DEP_MASK;
179 case NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP:
180 return NFC_PROTO_ISO14443_MASK | NFC_PROTO_NFC_DEP_MASK;
186 int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
188 struct nfc_target *targets;
189 struct sk_buff *atqa_skb = NULL;
190 struct sk_buff *sak_skb = NULL;
191 struct sk_buff *uid_skb = NULL;
194 pr_debug("from gate %d\n", gate);
196 targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
201 case NFC_HCI_RF_READER_A_GATE:
202 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
203 NFC_HCI_RF_READER_A_ATQA, &atqa_skb);
207 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
208 NFC_HCI_RF_READER_A_SAK, &sak_skb);
212 if (atqa_skb->len != 2 || sak_skb->len != 1) {
217 targets->supported_protocols =
218 nfc_hci_sak_to_protocol(sak_skb->data[0]);
219 if (targets->supported_protocols == 0xffffffff) {
224 targets->sens_res = be16_to_cpu(*(u16 *)atqa_skb->data);
225 targets->sel_res = sak_skb->data[0];
227 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
228 NFC_HCI_RF_READER_A_UID, &uid_skb);
232 if (uid_skb->len == 0 || uid_skb->len > NFC_NFCID1_MAXSIZE) {
237 memcpy(targets->nfcid1, uid_skb->data, uid_skb->len);
238 targets->nfcid1_len = uid_skb->len;
240 if (hdev->ops->complete_target_discovered) {
241 r = hdev->ops->complete_target_discovered(hdev, gate,
247 case NFC_HCI_RF_READER_B_GATE:
248 targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
251 if (hdev->ops->target_from_gate)
252 r = hdev->ops->target_from_gate(hdev, gate, targets);
258 if (hdev->ops->complete_target_discovered) {
259 r = hdev->ops->complete_target_discovered(hdev, gate,
267 /* if driver set the new gate, we will skip the old one */
268 if (targets->hci_reader_gate == 0x00)
269 targets->hci_reader_gate = gate;
271 r = nfc_targets_found(hdev->ndev, targets, 1);
281 EXPORT_SYMBOL(nfc_hci_target_discovered);
283 void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
289 case NFC_HCI_EVT_TARGET_DISCOVERED:
290 if (skb->len < 1) { /* no status data? */
295 if (skb->data[0] == 3) {
296 /* TODO: Multiple targets in field, none activated
297 * poll is supposedly stopped, but there is no
298 * single target to activate, so nothing to report
300 * if we need to restart poll, we must save the
301 * protocols from the initial poll and reuse here.
305 if (skb->data[0] != 0) {
310 r = nfc_hci_target_discovered(hdev,
311 nfc_hci_pipe2gate(hdev, pipe));
314 if (hdev->ops->event_received) {
315 hdev->ops->event_received(hdev,
316 nfc_hci_pipe2gate(hdev, pipe),
328 /* TODO: There was an error dispatching the event,
329 * how to propagate up to nfc core?
334 static void nfc_hci_cmd_timeout(unsigned long data)
336 struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data;
338 schedule_work(&hdev->msg_tx_work);
341 static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count,
342 struct nfc_hci_gate *gates)
345 while (gate_count--) {
346 r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID,
347 gates->gate, gates->pipe);
356 static int hci_dev_session_init(struct nfc_hci_dev *hdev)
358 struct sk_buff *skb = NULL;
361 if (hdev->init_data.gates[0].gate != NFC_HCI_ADMIN_GATE)
364 r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID,
365 hdev->init_data.gates[0].gate,
366 hdev->init_data.gates[0].pipe);
370 r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE,
371 NFC_HCI_ADMIN_SESSION_IDENTITY, &skb);
375 if (skb->len && skb->len == strlen(hdev->init_data.session_id))
376 if (memcmp(hdev->init_data.session_id, skb->data,
378 /* TODO ELa: restore gate<->pipe table from
380 * note: it doesn't seem possible to get the chip
381 * currently open gate/pipe table.
382 * It is only possible to obtain the supported
387 * For now, always do a full initialization */
390 r = nfc_hci_disconnect_all_gates(hdev);
394 r = hci_dev_connect_gates(hdev, hdev->init_data.gate_count,
395 hdev->init_data.gates);
399 r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
400 NFC_HCI_ADMIN_SESSION_IDENTITY,
401 hdev->init_data.session_id,
402 strlen(hdev->init_data.session_id));
407 nfc_hci_disconnect_all_gates(hdev);
415 static int hci_dev_version(struct nfc_hci_dev *hdev)
420 r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
421 NFC_HCI_ID_MGMT_VERSION_SW, &skb);
430 hdev->sw_romlib = (skb->data[0] & 0xf0) >> 4;
431 hdev->sw_patch = skb->data[0] & 0x0f;
432 hdev->sw_flashlib_major = skb->data[1];
433 hdev->sw_flashlib_minor = skb->data[2];
437 r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
438 NFC_HCI_ID_MGMT_VERSION_HW, &skb);
447 hdev->hw_derivative = (skb->data[0] & 0xe0) >> 5;
448 hdev->hw_version = skb->data[0] & 0x1f;
449 hdev->hw_mpw = (skb->data[1] & 0xc0) >> 6;
450 hdev->hw_software = skb->data[1] & 0x3f;
451 hdev->hw_bsid = skb->data[2];
455 pr_info("SOFTWARE INFO:\n");
456 pr_info("RomLib : %d\n", hdev->sw_romlib);
457 pr_info("Patch : %d\n", hdev->sw_patch);
458 pr_info("FlashLib Major : %d\n", hdev->sw_flashlib_major);
459 pr_info("FlashLib Minor : %d\n", hdev->sw_flashlib_minor);
460 pr_info("HARDWARE INFO:\n");
461 pr_info("Derivative : %d\n", hdev->hw_derivative);
462 pr_info("HW Version : %d\n", hdev->hw_version);
463 pr_info("#MPW : %d\n", hdev->hw_mpw);
464 pr_info("Software : %d\n", hdev->hw_software);
465 pr_info("BSID Version : %d\n", hdev->hw_bsid);
470 static int hci_dev_up(struct nfc_dev *nfc_dev)
472 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
475 if (hdev->ops->open) {
476 r = hdev->ops->open(hdev);
481 r = nfc_llc_start(hdev->llc);
485 r = hci_dev_session_init(hdev);
489 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
490 NFC_HCI_EVT_END_OPERATION, NULL, 0);
494 if (hdev->ops->hci_ready) {
495 r = hdev->ops->hci_ready(hdev);
500 r = hci_dev_version(hdev);
507 nfc_llc_stop(hdev->llc);
510 if (hdev->ops->close)
511 hdev->ops->close(hdev);
516 static int hci_dev_down(struct nfc_dev *nfc_dev)
518 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
520 nfc_llc_stop(hdev->llc);
522 if (hdev->ops->close)
523 hdev->ops->close(hdev);
525 memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
530 static int hci_start_poll(struct nfc_dev *nfc_dev,
531 u32 im_protocols, u32 tm_protocols)
533 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
535 if (hdev->ops->start_poll)
536 return hdev->ops->start_poll(hdev, im_protocols, tm_protocols);
538 return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
539 NFC_HCI_EVT_READER_REQUESTED,
543 static void hci_stop_poll(struct nfc_dev *nfc_dev)
545 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
547 nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
548 NFC_HCI_EVT_END_OPERATION, NULL, 0);
551 static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
552 __u8 comm_mode, __u8 *gb, size_t gb_len)
554 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
556 if (hdev->ops->dep_link_up)
557 return hdev->ops->dep_link_up(hdev, target, comm_mode,
563 static int hci_dep_link_down(struct nfc_dev *nfc_dev)
565 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
567 if (hdev->ops->dep_link_down)
568 return hdev->ops->dep_link_down(hdev);
573 static int hci_activate_target(struct nfc_dev *nfc_dev,
574 struct nfc_target *target, u32 protocol)
579 static void hci_deactivate_target(struct nfc_dev *nfc_dev,
580 struct nfc_target *target)
584 #define HCI_CB_TYPE_TRANSCEIVE 1
586 static void hci_transceive_cb(void *context, struct sk_buff *skb, int err)
588 struct nfc_hci_dev *hdev = context;
590 switch (hdev->async_cb_type) {
591 case HCI_CB_TYPE_TRANSCEIVE:
593 * TODO: Check RF Error indicator to make sure data is valid.
594 * It seems that HCI cmd can complete without error, but data
595 * can be invalid if an RF error occured? Ignore for now.
598 skb_trim(skb, skb->len - 1); /* RF Err ind */
600 hdev->async_cb(hdev->async_cb_context, skb, err);
609 static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
610 struct sk_buff *skb, data_exchange_cb_t cb,
613 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
616 pr_debug("target_idx=%d\n", target->idx);
618 switch (target->hci_reader_gate) {
619 case NFC_HCI_RF_READER_A_GATE:
620 case NFC_HCI_RF_READER_B_GATE:
621 if (hdev->ops->im_transceive) {
622 r = hdev->ops->im_transceive(hdev, target, skb, cb,
624 if (r <= 0) /* handled */
628 *skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */
630 hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE;
632 hdev->async_cb_context = cb_context;
634 r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
635 NFC_HCI_WR_XCHG_DATA, skb->data,
636 skb->len, hci_transceive_cb, hdev);
639 if (hdev->ops->im_transceive) {
640 r = hdev->ops->im_transceive(hdev, target, skb, cb,
655 static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
657 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
659 if (hdev->ops->tm_send)
660 return hdev->ops->tm_send(hdev, skb);
665 static int hci_check_presence(struct nfc_dev *nfc_dev,
666 struct nfc_target *target)
668 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
670 if (hdev->ops->check_presence)
671 return hdev->ops->check_presence(hdev, target);
676 static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err)
678 mutex_lock(&hdev->msg_tx_mutex);
680 if (hdev->cmd_pending_msg == NULL) {
681 nfc_driver_failure(hdev->ndev, err);
685 __nfc_hci_cmd_completion(hdev, err, NULL);
688 mutex_unlock(&hdev->msg_tx_mutex);
691 static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err)
693 nfc_hci_failure(hdev, err);
696 static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb)
698 struct hcp_packet *packet;
701 struct sk_buff *hcp_skb;
703 struct sk_buff *frag_skb;
706 packet = (struct hcp_packet *)skb->data;
707 if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) {
708 skb_queue_tail(&hdev->rx_hcp_frags, skb);
712 /* it's the last fragment. Does it need re-aggregation? */
713 if (skb_queue_len(&hdev->rx_hcp_frags)) {
714 pipe = packet->header & NFC_HCI_FRAGMENT;
715 skb_queue_tail(&hdev->rx_hcp_frags, skb);
718 skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
719 msg_len += (frag_skb->len -
720 NFC_HCI_HCP_PACKET_HEADER_LEN);
723 hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN +
724 msg_len, GFP_KERNEL);
725 if (hcp_skb == NULL) {
726 nfc_hci_failure(hdev, -ENOMEM);
730 *skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
732 skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
733 msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN;
734 memcpy(skb_put(hcp_skb, msg_len),
735 frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN,
739 skb_queue_purge(&hdev->rx_hcp_frags);
741 packet->header &= NFC_HCI_FRAGMENT;
745 /* if this is a response, dispatch immediately to
746 * unblock waiting cmd context. Otherwise, enqueue to dispatch
747 * in separate context where handler can also execute command.
749 packet = (struct hcp_packet *)hcp_skb->data;
750 type = HCP_MSG_GET_TYPE(packet->message.header);
751 if (type == NFC_HCI_HCP_RESPONSE) {
752 pipe = packet->header;
753 instruction = HCP_MSG_GET_CMD(packet->message.header);
754 skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN +
755 NFC_HCI_HCP_MESSAGE_HEADER_LEN);
756 nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
758 skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
759 schedule_work(&hdev->msg_rx_work);
763 static struct nfc_ops hci_nfc_ops = {
764 .dev_up = hci_dev_up,
765 .dev_down = hci_dev_down,
766 .start_poll = hci_start_poll,
767 .stop_poll = hci_stop_poll,
768 .dep_link_up = hci_dep_link_up,
769 .dep_link_down = hci_dep_link_down,
770 .activate_target = hci_activate_target,
771 .deactivate_target = hci_deactivate_target,
772 .im_transceive = hci_transceive,
773 .tm_send = hci_tm_send,
774 .check_presence = hci_check_presence,
777 struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
778 struct nfc_hci_init_data *init_data,
780 const char *llc_name,
783 int max_link_payload)
785 struct nfc_hci_dev *hdev;
787 if (ops->xmit == NULL)
793 hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL);
797 hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit,
798 nfc_hci_recv_from_llc, tx_headroom,
799 tx_tailroom, nfc_hci_llc_failure);
800 if (hdev->llc == NULL) {
805 hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols,
806 tx_headroom + HCI_CMDS_HEADROOM,
809 nfc_llc_free(hdev->llc);
815 hdev->max_data_link_payload = max_link_payload;
816 hdev->init_data = *init_data;
818 nfc_set_drvdata(hdev->ndev, hdev);
820 memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
824 EXPORT_SYMBOL(nfc_hci_allocate_device);
826 void nfc_hci_free_device(struct nfc_hci_dev *hdev)
828 nfc_free_device(hdev->ndev);
829 nfc_llc_free(hdev->llc);
832 EXPORT_SYMBOL(nfc_hci_free_device);
834 int nfc_hci_register_device(struct nfc_hci_dev *hdev)
836 mutex_init(&hdev->msg_tx_mutex);
838 INIT_LIST_HEAD(&hdev->msg_tx_queue);
840 INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work);
842 init_timer(&hdev->cmd_timer);
843 hdev->cmd_timer.data = (unsigned long)hdev;
844 hdev->cmd_timer.function = nfc_hci_cmd_timeout;
846 skb_queue_head_init(&hdev->rx_hcp_frags);
848 INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work);
850 skb_queue_head_init(&hdev->msg_rx_queue);
852 return nfc_register_device(hdev->ndev);
854 EXPORT_SYMBOL(nfc_hci_register_device);
856 void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
858 struct hci_msg *msg, *n;
860 skb_queue_purge(&hdev->rx_hcp_frags);
861 skb_queue_purge(&hdev->msg_rx_queue);
863 list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) {
864 list_del(&msg->msg_l);
865 skb_queue_purge(&msg->msg_frags);
869 del_timer_sync(&hdev->cmd_timer);
871 nfc_unregister_device(hdev->ndev);
873 cancel_work_sync(&hdev->msg_tx_work);
874 cancel_work_sync(&hdev->msg_rx_work);
876 EXPORT_SYMBOL(nfc_hci_unregister_device);
878 void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata)
880 hdev->clientdata = clientdata;
882 EXPORT_SYMBOL(nfc_hci_set_clientdata);
884 void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev)
886 return hdev->clientdata;
888 EXPORT_SYMBOL(nfc_hci_get_clientdata);
890 void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err)
892 nfc_hci_failure(hdev, err);
894 EXPORT_SYMBOL(nfc_hci_driver_failure);
896 void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
898 nfc_llc_rcv_from_drv(hdev->llc, skb);
900 EXPORT_SYMBOL(nfc_hci_recv_frame);
902 static int __init nfc_hci_init(void)
904 return nfc_llc_init();
907 static void __exit nfc_hci_exit(void)
912 subsys_initcall(nfc_hci_init);
913 module_exit(nfc_hci_exit);
915 MODULE_LICENSE("GPL");
916 MODULE_DESCRIPTION("NFC HCI Core");