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, see <http://www.gnu.org/licenses/>.
18 #define pr_fmt(fmt) "hci: %s: " fmt, __func__
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/nfc.h>
25 #include <net/nfc/nfc.h>
26 #include <net/nfc/hci.h>
27 #include <net/nfc/llc.h>
31 /* Largest headroom needed for outgoing HCI commands */
32 #define HCI_CMDS_HEADROOM 1
34 int nfc_hci_result_to_errno(u8 result)
39 case NFC_HCI_ANY_E_REG_PAR_UNKNOWN:
41 case NFC_HCI_ANY_E_TIMEOUT:
47 EXPORT_SYMBOL(nfc_hci_result_to_errno);
49 void nfc_hci_reset_pipes(struct nfc_hci_dev *hdev)
53 for (i = 0; i < NFC_HCI_MAX_PIPES; i++) {
54 hdev->pipes[i].gate = NFC_HCI_INVALID_GATE;
55 hdev->pipes[i].dest_host = NFC_HCI_INVALID_HOST;
57 memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
59 EXPORT_SYMBOL(nfc_hci_reset_pipes);
61 void nfc_hci_reset_pipes_per_host(struct nfc_hci_dev *hdev, u8 host)
65 for (i = 0; i < NFC_HCI_MAX_PIPES; i++) {
66 if (hdev->pipes[i].dest_host != host)
69 hdev->pipes[i].gate = NFC_HCI_INVALID_GATE;
70 hdev->pipes[i].dest_host = NFC_HCI_INVALID_HOST;
73 EXPORT_SYMBOL(nfc_hci_reset_pipes_per_host);
75 static void nfc_hci_msg_tx_work(struct work_struct *work)
77 struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev,
83 mutex_lock(&hdev->msg_tx_mutex);
84 if (hdev->shutting_down)
87 if (hdev->cmd_pending_msg) {
88 if (timer_pending(&hdev->cmd_timer) == 0) {
89 if (hdev->cmd_pending_msg->cb)
90 hdev->cmd_pending_msg->cb(hdev->
95 kfree(hdev->cmd_pending_msg);
96 hdev->cmd_pending_msg = NULL;
103 if (list_empty(&hdev->msg_tx_queue))
106 msg = list_first_entry(&hdev->msg_tx_queue, struct hci_msg, msg_l);
107 list_del(&msg->msg_l);
109 pr_debug("msg_tx_queue has a cmd to send\n");
110 while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) {
111 r = nfc_llc_xmit_from_hci(hdev->llc, skb);
114 skb_queue_purge(&msg->msg_frags);
116 msg->cb(msg->cb_context, NULL, r);
125 if (msg->wait_response == false) {
130 hdev->cmd_pending_msg = msg;
131 mod_timer(&hdev->cmd_timer, jiffies +
132 msecs_to_jiffies(hdev->cmd_pending_msg->completion_delay));
135 mutex_unlock(&hdev->msg_tx_mutex);
138 static void nfc_hci_msg_rx_work(struct work_struct *work)
140 struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev,
143 struct hcp_message *message;
148 while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) {
150 skb_pull(skb, NFC_HCI_HCP_PACKET_HEADER_LEN);
151 message = (struct hcp_message *)skb->data;
152 type = HCP_MSG_GET_TYPE(message->header);
153 instruction = HCP_MSG_GET_CMD(message->header);
154 skb_pull(skb, NFC_HCI_HCP_MESSAGE_HEADER_LEN);
156 nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, skb);
160 static void __nfc_hci_cmd_completion(struct nfc_hci_dev *hdev, int err,
163 del_timer_sync(&hdev->cmd_timer);
165 if (hdev->cmd_pending_msg->cb)
166 hdev->cmd_pending_msg->cb(hdev->cmd_pending_msg->cb_context,
171 kfree(hdev->cmd_pending_msg);
172 hdev->cmd_pending_msg = NULL;
174 schedule_work(&hdev->msg_tx_work);
177 void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
180 mutex_lock(&hdev->msg_tx_mutex);
182 if (hdev->cmd_pending_msg == NULL) {
187 __nfc_hci_cmd_completion(hdev, nfc_hci_result_to_errno(result), skb);
190 mutex_unlock(&hdev->msg_tx_mutex);
193 void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
196 u8 gate = hdev->pipes[pipe].gate;
197 u8 status = NFC_HCI_ANY_OK;
198 struct hci_create_pipe_resp *create_info;
199 struct hci_delete_pipe_noti *delete_info;
200 struct hci_all_pipe_cleared_noti *cleared_info;
202 pr_debug("from gate %x pipe %x cmd %x\n", gate, pipe, cmd);
205 case NFC_HCI_ADM_NOTIFY_PIPE_CREATED:
207 status = NFC_HCI_ANY_E_NOK;
210 create_info = (struct hci_create_pipe_resp *)skb->data;
212 /* Save the new created pipe and bind with local gate,
213 * the description for skb->data[3] is destination gate id
214 * but since we received this cmd from host controller, we
215 * are the destination and it is our local gate
217 hdev->gate2pipe[create_info->dest_gate] = create_info->pipe;
218 hdev->pipes[create_info->pipe].gate = create_info->dest_gate;
219 hdev->pipes[create_info->pipe].dest_host =
220 create_info->src_host;
222 case NFC_HCI_ANY_OPEN_PIPE:
223 if (gate == NFC_HCI_INVALID_GATE) {
224 status = NFC_HCI_ANY_E_NOK;
228 case NFC_HCI_ADM_NOTIFY_PIPE_DELETED:
230 status = NFC_HCI_ANY_E_NOK;
233 delete_info = (struct hci_delete_pipe_noti *)skb->data;
235 hdev->pipes[delete_info->pipe].gate = NFC_HCI_INVALID_GATE;
236 hdev->pipes[delete_info->pipe].dest_host = NFC_HCI_INVALID_HOST;
238 case NFC_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED:
240 status = NFC_HCI_ANY_E_NOK;
243 cleared_info = (struct hci_all_pipe_cleared_noti *)skb->data;
245 nfc_hci_reset_pipes_per_host(hdev, cleared_info->host);
248 pr_info("Discarded unknown cmd %x to gate %x\n", cmd, gate);
252 if (hdev->ops->cmd_received)
253 hdev->ops->cmd_received(hdev, pipe, cmd, skb);
256 nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
257 status, NULL, 0, NULL, NULL, 0);
262 u32 nfc_hci_sak_to_protocol(u8 sak)
264 switch (NFC_HCI_TYPE_A_SEL_PROT(sak)) {
265 case NFC_HCI_TYPE_A_SEL_PROT_MIFARE:
266 return NFC_PROTO_MIFARE_MASK;
267 case NFC_HCI_TYPE_A_SEL_PROT_ISO14443:
268 return NFC_PROTO_ISO14443_MASK;
269 case NFC_HCI_TYPE_A_SEL_PROT_DEP:
270 return NFC_PROTO_NFC_DEP_MASK;
271 case NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP:
272 return NFC_PROTO_ISO14443_MASK | NFC_PROTO_NFC_DEP_MASK;
277 EXPORT_SYMBOL(nfc_hci_sak_to_protocol);
279 int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
281 struct nfc_target *targets;
282 struct sk_buff *atqa_skb = NULL;
283 struct sk_buff *sak_skb = NULL;
284 struct sk_buff *uid_skb = NULL;
287 pr_debug("from gate %d\n", gate);
289 targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
294 case NFC_HCI_RF_READER_A_GATE:
295 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
296 NFC_HCI_RF_READER_A_ATQA, &atqa_skb);
300 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
301 NFC_HCI_RF_READER_A_SAK, &sak_skb);
305 if (atqa_skb->len != 2 || sak_skb->len != 1) {
310 targets->supported_protocols =
311 nfc_hci_sak_to_protocol(sak_skb->data[0]);
312 if (targets->supported_protocols == 0xffffffff) {
317 targets->sens_res = be16_to_cpu(*(__be16 *)atqa_skb->data);
318 targets->sel_res = sak_skb->data[0];
320 r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
321 NFC_HCI_RF_READER_A_UID, &uid_skb);
325 if (uid_skb->len == 0 || uid_skb->len > NFC_NFCID1_MAXSIZE) {
330 memcpy(targets->nfcid1, uid_skb->data, uid_skb->len);
331 targets->nfcid1_len = uid_skb->len;
333 if (hdev->ops->complete_target_discovered) {
334 r = hdev->ops->complete_target_discovered(hdev, gate,
340 case NFC_HCI_RF_READER_B_GATE:
341 targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
344 if (hdev->ops->target_from_gate)
345 r = hdev->ops->target_from_gate(hdev, gate, targets);
351 if (hdev->ops->complete_target_discovered) {
352 r = hdev->ops->complete_target_discovered(hdev, gate,
360 /* if driver set the new gate, we will skip the old one */
361 if (targets->hci_reader_gate == 0x00)
362 targets->hci_reader_gate = gate;
364 r = nfc_targets_found(hdev->ndev, targets, 1);
374 EXPORT_SYMBOL(nfc_hci_target_discovered);
376 void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
380 u8 gate = hdev->pipes[pipe].gate;
382 if (gate == NFC_HCI_INVALID_GATE) {
383 pr_err("Discarded event %x to unopened pipe %x\n", event, pipe);
387 if (hdev->ops->event_received) {
388 r = hdev->ops->event_received(hdev, pipe, event, skb);
394 case NFC_HCI_EVT_TARGET_DISCOVERED:
395 if (skb->len < 1) { /* no status data? */
400 if (skb->data[0] == 3) {
401 /* TODO: Multiple targets in field, none activated
402 * poll is supposedly stopped, but there is no
403 * single target to activate, so nothing to report
405 * if we need to restart poll, we must save the
406 * protocols from the initial poll and reuse here.
410 if (skb->data[0] != 0) {
415 r = nfc_hci_target_discovered(hdev, gate);
418 pr_info("Discarded unknown event %x to gate %x\n", event, gate);
428 nfc_hci_driver_failure(hdev, r);
431 static void nfc_hci_cmd_timeout(unsigned long data)
433 struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data;
435 schedule_work(&hdev->msg_tx_work);
438 static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count,
439 struct nfc_hci_gate *gates)
442 while (gate_count--) {
443 r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID,
444 gates->gate, gates->pipe);
453 static int hci_dev_session_init(struct nfc_hci_dev *hdev)
455 struct sk_buff *skb = NULL;
458 if (hdev->init_data.gates[0].gate != NFC_HCI_ADMIN_GATE)
461 r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID,
462 hdev->init_data.gates[0].gate,
463 hdev->init_data.gates[0].pipe);
467 r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE,
468 NFC_HCI_ADMIN_SESSION_IDENTITY, &skb);
472 if (skb->len && skb->len == strlen(hdev->init_data.session_id) &&
473 (memcmp(hdev->init_data.session_id, skb->data,
474 skb->len) == 0) && hdev->ops->load_session) {
475 /* Restore gate<->pipe table from some proprietary location. */
477 r = hdev->ops->load_session(hdev);
483 r = nfc_hci_disconnect_all_gates(hdev);
487 r = hci_dev_connect_gates(hdev, hdev->init_data.gate_count,
488 hdev->init_data.gates);
492 r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
493 NFC_HCI_ADMIN_SESSION_IDENTITY,
494 hdev->init_data.session_id,
495 strlen(hdev->init_data.session_id));
501 nfc_hci_disconnect_all_gates(hdev);
509 static int hci_dev_version(struct nfc_hci_dev *hdev)
514 r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
515 NFC_HCI_ID_MGMT_VERSION_SW, &skb);
516 if (r == -EOPNOTSUPP) {
517 pr_info("Software/Hardware info not available\n");
528 hdev->sw_romlib = (skb->data[0] & 0xf0) >> 4;
529 hdev->sw_patch = skb->data[0] & 0x0f;
530 hdev->sw_flashlib_major = skb->data[1];
531 hdev->sw_flashlib_minor = skb->data[2];
535 r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
536 NFC_HCI_ID_MGMT_VERSION_HW, &skb);
545 hdev->hw_derivative = (skb->data[0] & 0xe0) >> 5;
546 hdev->hw_version = skb->data[0] & 0x1f;
547 hdev->hw_mpw = (skb->data[1] & 0xc0) >> 6;
548 hdev->hw_software = skb->data[1] & 0x3f;
549 hdev->hw_bsid = skb->data[2];
553 pr_info("SOFTWARE INFO:\n");
554 pr_info("RomLib : %d\n", hdev->sw_romlib);
555 pr_info("Patch : %d\n", hdev->sw_patch);
556 pr_info("FlashLib Major : %d\n", hdev->sw_flashlib_major);
557 pr_info("FlashLib Minor : %d\n", hdev->sw_flashlib_minor);
558 pr_info("HARDWARE INFO:\n");
559 pr_info("Derivative : %d\n", hdev->hw_derivative);
560 pr_info("HW Version : %d\n", hdev->hw_version);
561 pr_info("#MPW : %d\n", hdev->hw_mpw);
562 pr_info("Software : %d\n", hdev->hw_software);
563 pr_info("BSID Version : %d\n", hdev->hw_bsid);
568 static int hci_dev_up(struct nfc_dev *nfc_dev)
570 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
573 if (hdev->ops->open) {
574 r = hdev->ops->open(hdev);
579 r = nfc_llc_start(hdev->llc);
583 r = hci_dev_session_init(hdev);
587 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
588 NFC_HCI_EVT_END_OPERATION, NULL, 0);
592 if (hdev->ops->hci_ready) {
593 r = hdev->ops->hci_ready(hdev);
598 r = hci_dev_version(hdev);
605 nfc_llc_stop(hdev->llc);
608 if (hdev->ops->close)
609 hdev->ops->close(hdev);
614 static int hci_dev_down(struct nfc_dev *nfc_dev)
616 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
618 nfc_llc_stop(hdev->llc);
620 if (hdev->ops->close)
621 hdev->ops->close(hdev);
623 nfc_hci_reset_pipes(hdev);
628 static int hci_start_poll(struct nfc_dev *nfc_dev,
629 u32 im_protocols, u32 tm_protocols)
631 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
633 if (hdev->ops->start_poll)
634 return hdev->ops->start_poll(hdev, im_protocols, tm_protocols);
636 return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
637 NFC_HCI_EVT_READER_REQUESTED,
641 static void hci_stop_poll(struct nfc_dev *nfc_dev)
643 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
645 if (hdev->ops->stop_poll)
646 hdev->ops->stop_poll(hdev);
648 nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
649 NFC_HCI_EVT_END_OPERATION, NULL, 0);
652 static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
653 __u8 comm_mode, __u8 *gb, size_t gb_len)
655 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
657 if (!hdev->ops->dep_link_up)
660 return hdev->ops->dep_link_up(hdev, target, comm_mode,
664 static int hci_dep_link_down(struct nfc_dev *nfc_dev)
666 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
668 if (!hdev->ops->dep_link_down)
671 return hdev->ops->dep_link_down(hdev);
674 static int hci_activate_target(struct nfc_dev *nfc_dev,
675 struct nfc_target *target, u32 protocol)
680 static void hci_deactivate_target(struct nfc_dev *nfc_dev,
681 struct nfc_target *target)
685 #define HCI_CB_TYPE_TRANSCEIVE 1
687 static void hci_transceive_cb(void *context, struct sk_buff *skb, int err)
689 struct nfc_hci_dev *hdev = context;
691 switch (hdev->async_cb_type) {
692 case HCI_CB_TYPE_TRANSCEIVE:
694 * TODO: Check RF Error indicator to make sure data is valid.
695 * It seems that HCI cmd can complete without error, but data
696 * can be invalid if an RF error occured? Ignore for now.
699 skb_trim(skb, skb->len - 1); /* RF Err ind */
701 hdev->async_cb(hdev->async_cb_context, skb, err);
710 static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
711 struct sk_buff *skb, data_exchange_cb_t cb,
714 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
717 pr_debug("target_idx=%d\n", target->idx);
719 switch (target->hci_reader_gate) {
720 case NFC_HCI_RF_READER_A_GATE:
721 case NFC_HCI_RF_READER_B_GATE:
722 if (hdev->ops->im_transceive) {
723 r = hdev->ops->im_transceive(hdev, target, skb, cb,
725 if (r <= 0) /* handled */
729 *skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */
731 hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE;
733 hdev->async_cb_context = cb_context;
735 r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
736 NFC_HCI_WR_XCHG_DATA, skb->data,
737 skb->len, hci_transceive_cb, hdev);
740 if (hdev->ops->im_transceive) {
741 r = hdev->ops->im_transceive(hdev, target, skb, cb,
756 static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
758 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
760 if (!hdev->ops->tm_send) {
765 return hdev->ops->tm_send(hdev, skb);
768 static int hci_check_presence(struct nfc_dev *nfc_dev,
769 struct nfc_target *target)
771 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
773 if (!hdev->ops->check_presence)
776 return hdev->ops->check_presence(hdev, target);
779 static int hci_discover_se(struct nfc_dev *nfc_dev)
781 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
783 if (hdev->ops->discover_se)
784 return hdev->ops->discover_se(hdev);
789 static int hci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx)
791 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
793 if (hdev->ops->enable_se)
794 return hdev->ops->enable_se(hdev, se_idx);
799 static int hci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx)
801 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
803 if (hdev->ops->disable_se)
804 return hdev->ops->disable_se(hdev, se_idx);
809 static int hci_se_io(struct nfc_dev *nfc_dev, u32 se_idx,
810 u8 *apdu, size_t apdu_length,
811 se_io_cb_t cb, void *cb_context)
813 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
815 if (hdev->ops->se_io)
816 return hdev->ops->se_io(hdev, se_idx, apdu,
817 apdu_length, cb, cb_context);
822 static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err)
824 mutex_lock(&hdev->msg_tx_mutex);
826 if (hdev->cmd_pending_msg == NULL) {
827 nfc_driver_failure(hdev->ndev, err);
831 __nfc_hci_cmd_completion(hdev, err, NULL);
834 mutex_unlock(&hdev->msg_tx_mutex);
837 static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err)
839 nfc_hci_failure(hdev, err);
842 static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb)
844 struct hcp_packet *packet;
847 struct sk_buff *hcp_skb;
849 struct sk_buff *frag_skb;
852 packet = (struct hcp_packet *)skb->data;
853 if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) {
854 skb_queue_tail(&hdev->rx_hcp_frags, skb);
858 /* it's the last fragment. Does it need re-aggregation? */
859 if (skb_queue_len(&hdev->rx_hcp_frags)) {
860 pipe = packet->header & NFC_HCI_FRAGMENT;
861 skb_queue_tail(&hdev->rx_hcp_frags, skb);
864 skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
865 msg_len += (frag_skb->len -
866 NFC_HCI_HCP_PACKET_HEADER_LEN);
869 hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN +
870 msg_len, GFP_KERNEL);
871 if (hcp_skb == NULL) {
872 nfc_hci_failure(hdev, -ENOMEM);
876 *skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
878 skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
879 msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN;
880 memcpy(skb_put(hcp_skb, msg_len),
881 frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN,
885 skb_queue_purge(&hdev->rx_hcp_frags);
887 packet->header &= NFC_HCI_FRAGMENT;
891 /* if this is a response, dispatch immediately to
892 * unblock waiting cmd context. Otherwise, enqueue to dispatch
893 * in separate context where handler can also execute command.
895 packet = (struct hcp_packet *)hcp_skb->data;
896 type = HCP_MSG_GET_TYPE(packet->message.header);
897 if (type == NFC_HCI_HCP_RESPONSE) {
898 pipe = packet->header;
899 instruction = HCP_MSG_GET_CMD(packet->message.header);
900 skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN +
901 NFC_HCI_HCP_MESSAGE_HEADER_LEN);
902 nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
904 skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
905 schedule_work(&hdev->msg_rx_work);
909 static int hci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name)
911 struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
913 if (!hdev->ops->fw_download)
916 return hdev->ops->fw_download(hdev, firmware_name);
919 static struct nfc_ops hci_nfc_ops = {
920 .dev_up = hci_dev_up,
921 .dev_down = hci_dev_down,
922 .start_poll = hci_start_poll,
923 .stop_poll = hci_stop_poll,
924 .dep_link_up = hci_dep_link_up,
925 .dep_link_down = hci_dep_link_down,
926 .activate_target = hci_activate_target,
927 .deactivate_target = hci_deactivate_target,
928 .im_transceive = hci_transceive,
929 .tm_send = hci_tm_send,
930 .check_presence = hci_check_presence,
931 .fw_download = hci_fw_download,
932 .discover_se = hci_discover_se,
933 .enable_se = hci_enable_se,
934 .disable_se = hci_disable_se,
938 struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
939 struct nfc_hci_init_data *init_data,
940 unsigned long quirks,
942 const char *llc_name,
945 int max_link_payload)
947 struct nfc_hci_dev *hdev;
949 if (ops->xmit == NULL)
955 hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL);
959 hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit,
960 nfc_hci_recv_from_llc, tx_headroom,
961 tx_tailroom, nfc_hci_llc_failure);
962 if (hdev->llc == NULL) {
967 hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols,
968 tx_headroom + HCI_CMDS_HEADROOM,
971 nfc_llc_free(hdev->llc);
977 hdev->max_data_link_payload = max_link_payload;
978 hdev->init_data = *init_data;
980 nfc_set_drvdata(hdev->ndev, hdev);
982 nfc_hci_reset_pipes(hdev);
984 hdev->quirks = quirks;
988 EXPORT_SYMBOL(nfc_hci_allocate_device);
990 void nfc_hci_free_device(struct nfc_hci_dev *hdev)
992 nfc_free_device(hdev->ndev);
993 nfc_llc_free(hdev->llc);
996 EXPORT_SYMBOL(nfc_hci_free_device);
998 int nfc_hci_register_device(struct nfc_hci_dev *hdev)
1000 mutex_init(&hdev->msg_tx_mutex);
1002 INIT_LIST_HEAD(&hdev->msg_tx_queue);
1004 INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work);
1006 init_timer(&hdev->cmd_timer);
1007 hdev->cmd_timer.data = (unsigned long)hdev;
1008 hdev->cmd_timer.function = nfc_hci_cmd_timeout;
1010 skb_queue_head_init(&hdev->rx_hcp_frags);
1012 INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work);
1014 skb_queue_head_init(&hdev->msg_rx_queue);
1016 return nfc_register_device(hdev->ndev);
1018 EXPORT_SYMBOL(nfc_hci_register_device);
1020 void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
1022 struct hci_msg *msg, *n;
1024 mutex_lock(&hdev->msg_tx_mutex);
1026 if (hdev->cmd_pending_msg) {
1027 if (hdev->cmd_pending_msg->cb)
1028 hdev->cmd_pending_msg->cb(
1029 hdev->cmd_pending_msg->cb_context,
1031 kfree(hdev->cmd_pending_msg);
1032 hdev->cmd_pending_msg = NULL;
1035 hdev->shutting_down = true;
1037 mutex_unlock(&hdev->msg_tx_mutex);
1039 del_timer_sync(&hdev->cmd_timer);
1040 cancel_work_sync(&hdev->msg_tx_work);
1042 cancel_work_sync(&hdev->msg_rx_work);
1044 nfc_unregister_device(hdev->ndev);
1046 skb_queue_purge(&hdev->rx_hcp_frags);
1047 skb_queue_purge(&hdev->msg_rx_queue);
1049 list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) {
1050 list_del(&msg->msg_l);
1051 skb_queue_purge(&msg->msg_frags);
1055 EXPORT_SYMBOL(nfc_hci_unregister_device);
1057 void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata)
1059 hdev->clientdata = clientdata;
1061 EXPORT_SYMBOL(nfc_hci_set_clientdata);
1063 void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev)
1065 return hdev->clientdata;
1067 EXPORT_SYMBOL(nfc_hci_get_clientdata);
1069 void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err)
1071 nfc_hci_failure(hdev, err);
1073 EXPORT_SYMBOL(nfc_hci_driver_failure);
1075 void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
1077 nfc_llc_rcv_from_drv(hdev->llc, skb);
1079 EXPORT_SYMBOL(nfc_hci_recv_frame);
1081 static int __init nfc_hci_init(void)
1083 return nfc_llc_init();
1086 static void __exit nfc_hci_exit(void)
1091 subsys_initcall(nfc_hci_init);
1092 module_exit(nfc_hci_exit);
1094 MODULE_LICENSE("GPL");
1095 MODULE_DESCRIPTION("NFC HCI Core");