2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/slab.h>
30 #include <linux/rfkill.h>
31 #include <linux/nfc.h>
33 #include <net/genetlink.h>
39 #define NFC_CHECK_PRES_FREQ_MS 2000
41 int nfc_devlist_generation;
42 DEFINE_MUTEX(nfc_devlist_mutex);
44 /* NFC device ID bitmap */
45 static DEFINE_IDA(nfc_index_ida);
47 int nfc_fw_download(struct nfc_dev *dev, const char *firmware_name)
51 pr_debug("%s do firmware %s\n", dev_name(&dev->dev), firmware_name);
53 device_lock(&dev->dev);
55 if (!device_is_registered(&dev->dev)) {
65 if (!dev->ops->fw_download) {
70 dev->fw_download_in_progress = true;
71 rc = dev->ops->fw_download(dev, firmware_name);
73 dev->fw_download_in_progress = false;
76 device_unlock(&dev->dev);
81 * nfc_fw_download_done - inform that a firmware download was completed
83 * @dev: The nfc device to which firmware was downloaded
84 * @firmware_name: The firmware filename
85 * @result: The positive value of a standard errno value
87 int nfc_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
90 dev->fw_download_in_progress = false;
92 return nfc_genl_fw_download_done(dev, firmware_name, result);
94 EXPORT_SYMBOL(nfc_fw_download_done);
97 * nfc_dev_up - turn on the NFC device
99 * @dev: The nfc device to be turned on
101 * The device remains up until the nfc_dev_down function is called.
103 int nfc_dev_up(struct nfc_dev *dev)
107 pr_debug("dev_name=%s\n", dev_name(&dev->dev));
109 device_lock(&dev->dev);
111 if (dev->rfkill && rfkill_blocked(dev->rfkill)) {
116 if (!device_is_registered(&dev->dev)) {
121 if (dev->fw_download_in_progress) {
131 if (dev->ops->dev_up)
132 rc = dev->ops->dev_up(dev);
137 /* We have to enable the device before discovering SEs */
138 if (dev->ops->discover_se) {
139 rc = dev->ops->discover_se(dev);
141 pr_warn("SE discovery failed\n");
145 device_unlock(&dev->dev);
150 * nfc_dev_down - turn off the NFC device
152 * @dev: The nfc device to be turned off
154 int nfc_dev_down(struct nfc_dev *dev)
158 pr_debug("dev_name=%s\n", dev_name(&dev->dev));
160 device_lock(&dev->dev);
162 if (!device_is_registered(&dev->dev)) {
172 if (dev->polling || dev->active_target) {
177 if (dev->ops->dev_down)
178 dev->ops->dev_down(dev);
183 device_unlock(&dev->dev);
187 static int nfc_rfkill_set_block(void *data, bool blocked)
189 struct nfc_dev *dev = data;
191 pr_debug("%s blocked %d", dev_name(&dev->dev), blocked);
201 static const struct rfkill_ops nfc_rfkill_ops = {
202 .set_block = nfc_rfkill_set_block,
206 * nfc_start_poll - start polling for nfc targets
208 * @dev: The nfc device that must start polling
209 * @protocols: bitset of nfc protocols that must be used for polling
211 * The device remains polling for targets until a target is found or
212 * the nfc_stop_poll function is called.
214 int nfc_start_poll(struct nfc_dev *dev, u32 im_protocols, u32 tm_protocols)
218 pr_debug("dev_name %s initiator protocols 0x%x target protocols 0x%x\n",
219 dev_name(&dev->dev), im_protocols, tm_protocols);
221 if (!im_protocols && !tm_protocols)
224 device_lock(&dev->dev);
226 if (!device_is_registered(&dev->dev)) {
241 rc = dev->ops->start_poll(dev, im_protocols, tm_protocols);
244 dev->rf_mode = NFC_RF_NONE;
248 device_unlock(&dev->dev);
253 * nfc_stop_poll - stop polling for nfc targets
255 * @dev: The nfc device that must stop polling
257 int nfc_stop_poll(struct nfc_dev *dev)
261 pr_debug("dev_name=%s\n", dev_name(&dev->dev));
263 device_lock(&dev->dev);
265 if (!device_is_registered(&dev->dev)) {
275 dev->ops->stop_poll(dev);
276 dev->polling = false;
277 dev->rf_mode = NFC_RF_NONE;
280 device_unlock(&dev->dev);
284 static struct nfc_target *nfc_find_target(struct nfc_dev *dev, u32 target_idx)
288 if (dev->n_targets == 0)
291 for (i = 0; i < dev->n_targets; i++) {
292 if (dev->targets[i].idx == target_idx)
293 return &dev->targets[i];
299 int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode)
304 struct nfc_target *target;
306 pr_debug("dev_name=%s comm %d\n", dev_name(&dev->dev), comm_mode);
308 if (!dev->ops->dep_link_up)
311 device_lock(&dev->dev);
313 if (!device_is_registered(&dev->dev)) {
318 if (dev->dep_link_up == true) {
323 gb = nfc_llcp_general_bytes(dev, &gb_len);
324 if (gb_len > NFC_MAX_GT_LEN) {
329 target = nfc_find_target(dev, target_index);
330 if (target == NULL) {
335 rc = dev->ops->dep_link_up(dev, target, comm_mode, gb, gb_len);
337 dev->active_target = target;
338 dev->rf_mode = NFC_RF_INITIATOR;
342 device_unlock(&dev->dev);
346 int nfc_dep_link_down(struct nfc_dev *dev)
350 pr_debug("dev_name=%s\n", dev_name(&dev->dev));
352 if (!dev->ops->dep_link_down)
355 device_lock(&dev->dev);
357 if (!device_is_registered(&dev->dev)) {
362 if (dev->dep_link_up == false) {
367 rc = dev->ops->dep_link_down(dev);
369 dev->dep_link_up = false;
370 dev->active_target = NULL;
371 dev->rf_mode = NFC_RF_NONE;
372 nfc_llcp_mac_is_down(dev);
373 nfc_genl_dep_link_down_event(dev);
377 device_unlock(&dev->dev);
382 int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
383 u8 comm_mode, u8 rf_mode)
385 dev->dep_link_up = true;
387 if (!dev->active_target) {
388 struct nfc_target *target;
390 target = nfc_find_target(dev, target_idx);
394 dev->active_target = target;
397 dev->polling = false;
398 dev->rf_mode = rf_mode;
400 nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode);
402 return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode);
404 EXPORT_SYMBOL(nfc_dep_link_is_up);
407 * nfc_activate_target - prepare the target for data exchange
409 * @dev: The nfc device that found the target
410 * @target_idx: index of the target that must be activated
411 * @protocol: nfc protocol that will be used for data exchange
413 int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol)
416 struct nfc_target *target;
418 pr_debug("dev_name=%s target_idx=%u protocol=%u\n",
419 dev_name(&dev->dev), target_idx, protocol);
421 device_lock(&dev->dev);
423 if (!device_is_registered(&dev->dev)) {
428 if (dev->active_target) {
433 target = nfc_find_target(dev, target_idx);
434 if (target == NULL) {
439 rc = dev->ops->activate_target(dev, target, protocol);
441 dev->active_target = target;
442 dev->rf_mode = NFC_RF_INITIATOR;
444 if (dev->ops->check_presence && !dev->shutting_down)
445 mod_timer(&dev->check_pres_timer, jiffies +
446 msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
450 device_unlock(&dev->dev);
455 * nfc_deactivate_target - deactivate a nfc target
457 * @dev: The nfc device that found the target
458 * @target_idx: index of the target that must be deactivated
460 int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx)
464 pr_debug("dev_name=%s target_idx=%u\n",
465 dev_name(&dev->dev), target_idx);
467 device_lock(&dev->dev);
469 if (!device_is_registered(&dev->dev)) {
474 if (dev->active_target == NULL) {
479 if (dev->active_target->idx != target_idx) {
484 if (dev->ops->check_presence)
485 del_timer_sync(&dev->check_pres_timer);
487 dev->ops->deactivate_target(dev, dev->active_target);
488 dev->active_target = NULL;
491 device_unlock(&dev->dev);
496 * nfc_data_exchange - transceive data
498 * @dev: The nfc device that found the target
499 * @target_idx: index of the target
500 * @skb: data to be sent
501 * @cb: callback called when the response is received
502 * @cb_context: parameter for the callback function
504 * The user must wait for the callback before calling this function again.
506 int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb,
507 data_exchange_cb_t cb, void *cb_context)
511 pr_debug("dev_name=%s target_idx=%u skb->len=%u\n",
512 dev_name(&dev->dev), target_idx, skb->len);
514 device_lock(&dev->dev);
516 if (!device_is_registered(&dev->dev)) {
522 if (dev->rf_mode == NFC_RF_INITIATOR && dev->active_target != NULL) {
523 if (dev->active_target->idx != target_idx) {
529 if (dev->ops->check_presence)
530 del_timer_sync(&dev->check_pres_timer);
532 rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb,
535 if (!rc && dev->ops->check_presence && !dev->shutting_down)
536 mod_timer(&dev->check_pres_timer, jiffies +
537 msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
538 } else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) {
539 rc = dev->ops->tm_send(dev, skb);
548 device_unlock(&dev->dev);
552 struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx)
554 struct nfc_se *se, *n;
556 list_for_each_entry_safe(se, n, &dev->secure_elements, list)
557 if (se->idx == se_idx)
562 EXPORT_SYMBOL(nfc_find_se);
564 int nfc_enable_se(struct nfc_dev *dev, u32 se_idx)
570 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
572 device_lock(&dev->dev);
574 if (!device_is_registered(&dev->dev)) {
589 if (!dev->ops->enable_se || !dev->ops->disable_se) {
594 se = nfc_find_se(dev, se_idx);
600 if (se->state == NFC_SE_ENABLED) {
605 rc = dev->ops->enable_se(dev, se_idx);
607 se->state = NFC_SE_ENABLED;
610 device_unlock(&dev->dev);
614 int nfc_disable_se(struct nfc_dev *dev, u32 se_idx)
620 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
622 device_lock(&dev->dev);
624 if (!device_is_registered(&dev->dev)) {
634 if (!dev->ops->enable_se || !dev->ops->disable_se) {
639 se = nfc_find_se(dev, se_idx);
645 if (se->state == NFC_SE_DISABLED) {
650 rc = dev->ops->disable_se(dev, se_idx);
652 se->state = NFC_SE_DISABLED;
655 device_unlock(&dev->dev);
659 int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len)
661 pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len);
663 if (gb_len > NFC_MAX_GT_LEN)
666 return nfc_llcp_set_remote_gb(dev, gb, gb_len);
668 EXPORT_SYMBOL(nfc_set_remote_general_bytes);
670 u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len)
672 pr_debug("dev_name=%s\n", dev_name(&dev->dev));
674 return nfc_llcp_general_bytes(dev, gb_len);
676 EXPORT_SYMBOL(nfc_get_local_general_bytes);
678 int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb)
680 /* Only LLCP target mode for now */
681 if (dev->dep_link_up == false) {
686 return nfc_llcp_data_received(dev, skb);
688 EXPORT_SYMBOL(nfc_tm_data_received);
690 int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode,
691 u8 *gb, size_t gb_len)
695 device_lock(&dev->dev);
697 dev->polling = false;
700 rc = nfc_set_remote_general_bytes(dev, gb, gb_len);
705 dev->rf_mode = NFC_RF_TARGET;
707 if (protocol == NFC_PROTO_NFC_DEP_MASK)
708 nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET);
710 rc = nfc_genl_tm_activated(dev, protocol);
713 device_unlock(&dev->dev);
717 EXPORT_SYMBOL(nfc_tm_activated);
719 int nfc_tm_deactivated(struct nfc_dev *dev)
721 dev->dep_link_up = false;
722 dev->rf_mode = NFC_RF_NONE;
724 return nfc_genl_tm_deactivated(dev);
726 EXPORT_SYMBOL(nfc_tm_deactivated);
729 * nfc_alloc_send_skb - allocate a skb for data exchange responses
731 * @size: size to allocate
734 struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk,
735 unsigned int flags, unsigned int size,
739 unsigned int total_size;
742 dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
744 skb = sock_alloc_send_skb(sk, total_size, flags & MSG_DONTWAIT, err);
746 skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
752 * nfc_alloc_recv_skb - allocate a skb for data exchange responses
754 * @size: size to allocate
757 struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp)
760 unsigned int total_size;
762 total_size = size + 1;
763 skb = alloc_skb(total_size, gfp);
770 EXPORT_SYMBOL(nfc_alloc_recv_skb);
773 * nfc_targets_found - inform that targets were found
775 * @dev: The nfc device that found the targets
776 * @targets: array of nfc targets found
777 * @ntargets: targets array size
779 * The device driver must call this function when one or many nfc targets
780 * are found. After calling this function, the device driver must stop
781 * polling for targets.
782 * NOTE: This function can be called with targets=NULL and n_targets=0 to
783 * notify a driver error, meaning that the polling operation cannot complete.
784 * IMPORTANT: this function must not be called from an atomic context.
785 * In addition, it must also not be called from a context that would prevent
786 * the NFC Core to call other nfc ops entry point concurrently.
788 int nfc_targets_found(struct nfc_dev *dev,
789 struct nfc_target *targets, int n_targets)
793 pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets);
795 for (i = 0; i < n_targets; i++)
796 targets[i].idx = dev->target_next_idx++;
798 device_lock(&dev->dev);
800 if (dev->polling == false) {
801 device_unlock(&dev->dev);
805 dev->polling = false;
807 dev->targets_generation++;
813 dev->targets = kmemdup(targets,
814 n_targets * sizeof(struct nfc_target),
819 device_unlock(&dev->dev);
824 dev->n_targets = n_targets;
825 device_unlock(&dev->dev);
827 nfc_genl_targets_found(dev);
831 EXPORT_SYMBOL(nfc_targets_found);
834 * nfc_target_lost - inform that an activated target went out of field
836 * @dev: The nfc device that had the activated target in field
837 * @target_idx: the nfc index of the target
839 * The device driver must call this function when the activated target
840 * goes out of the field.
841 * IMPORTANT: this function must not be called from an atomic context.
842 * In addition, it must also not be called from a context that would prevent
843 * the NFC Core to call other nfc ops entry point concurrently.
845 int nfc_target_lost(struct nfc_dev *dev, u32 target_idx)
847 struct nfc_target *tg;
850 pr_debug("dev_name %s n_target %d\n", dev_name(&dev->dev), target_idx);
852 device_lock(&dev->dev);
854 for (i = 0; i < dev->n_targets; i++) {
855 tg = &dev->targets[i];
856 if (tg->idx == target_idx)
860 if (i == dev->n_targets) {
861 device_unlock(&dev->dev);
865 dev->targets_generation++;
867 dev->active_target = NULL;
869 if (dev->n_targets) {
870 memcpy(&dev->targets[i], &dev->targets[i + 1],
871 (dev->n_targets - i) * sizeof(struct nfc_target));
877 device_unlock(&dev->dev);
879 nfc_genl_target_lost(dev, target_idx);
883 EXPORT_SYMBOL(nfc_target_lost);
885 inline void nfc_driver_failure(struct nfc_dev *dev, int err)
887 nfc_targets_found(dev, NULL, 0);
889 EXPORT_SYMBOL(nfc_driver_failure);
891 int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type)
896 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
898 se = nfc_find_se(dev, se_idx);
902 se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL);
908 se->state = NFC_SE_DISABLED;
909 INIT_LIST_HEAD(&se->list);
911 list_add(&se->list, &dev->secure_elements);
913 rc = nfc_genl_se_added(dev, se_idx, type);
923 EXPORT_SYMBOL(nfc_add_se);
925 int nfc_remove_se(struct nfc_dev *dev, u32 se_idx)
927 struct nfc_se *se, *n;
930 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
932 list_for_each_entry_safe(se, n, &dev->secure_elements, list)
933 if (se->idx == se_idx) {
934 rc = nfc_genl_se_removed(dev, se_idx);
946 EXPORT_SYMBOL(nfc_remove_se);
948 static void nfc_release(struct device *d)
950 struct nfc_dev *dev = to_nfc_dev(d);
951 struct nfc_se *se, *n;
953 pr_debug("dev_name=%s\n", dev_name(&dev->dev));
955 nfc_genl_data_exit(&dev->genl_data);
958 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
959 nfc_genl_se_removed(dev, se->idx);
967 static void nfc_check_pres_work(struct work_struct *work)
969 struct nfc_dev *dev = container_of(work, struct nfc_dev,
973 device_lock(&dev->dev);
975 if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) {
976 rc = dev->ops->check_presence(dev, dev->active_target);
977 if (rc == -EOPNOTSUPP)
980 u32 active_target_idx = dev->active_target->idx;
981 device_unlock(&dev->dev);
982 nfc_target_lost(dev, active_target_idx);
986 if (!dev->shutting_down)
987 mod_timer(&dev->check_pres_timer, jiffies +
988 msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
992 device_unlock(&dev->dev);
995 static void nfc_check_pres_timeout(unsigned long data)
997 struct nfc_dev *dev = (struct nfc_dev *)data;
999 schedule_work(&dev->check_pres_work);
1002 struct class nfc_class = {
1004 .dev_release = nfc_release,
1006 EXPORT_SYMBOL(nfc_class);
1008 static int match_idx(struct device *d, const void *data)
1010 struct nfc_dev *dev = to_nfc_dev(d);
1011 const unsigned int *idx = data;
1013 return dev->idx == *idx;
1016 struct nfc_dev *nfc_get_device(unsigned int idx)
1020 d = class_find_device(&nfc_class, NULL, &idx, match_idx);
1024 return to_nfc_dev(d);
1028 * nfc_allocate_device - allocate a new nfc device
1030 * @ops: device operations
1031 * @supported_protocols: NFC protocols supported by the device
1033 struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
1034 u32 supported_protocols,
1035 int tx_headroom, int tx_tailroom)
1037 struct nfc_dev *dev;
1039 if (!ops->start_poll || !ops->stop_poll || !ops->activate_target ||
1040 !ops->deactivate_target || !ops->im_transceive)
1043 if (!supported_protocols)
1046 dev = kzalloc(sizeof(struct nfc_dev), GFP_KERNEL);
1051 dev->supported_protocols = supported_protocols;
1052 dev->tx_headroom = tx_headroom;
1053 dev->tx_tailroom = tx_tailroom;
1054 INIT_LIST_HEAD(&dev->secure_elements);
1056 nfc_genl_data_init(&dev->genl_data);
1058 dev->rf_mode = NFC_RF_NONE;
1060 /* first generation must not be 0 */
1061 dev->targets_generation = 1;
1063 if (ops->check_presence) {
1064 init_timer(&dev->check_pres_timer);
1065 dev->check_pres_timer.data = (unsigned long)dev;
1066 dev->check_pres_timer.function = nfc_check_pres_timeout;
1068 INIT_WORK(&dev->check_pres_work, nfc_check_pres_work);
1073 EXPORT_SYMBOL(nfc_allocate_device);
1076 * nfc_register_device - register a nfc device in the nfc subsystem
1078 * @dev: The nfc device to register
1080 int nfc_register_device(struct nfc_dev *dev)
1084 pr_debug("dev_name=%s\n", dev_name(&dev->dev));
1086 dev->idx = ida_simple_get(&nfc_index_ida, 0, 0, GFP_KERNEL);
1090 dev->dev.class = &nfc_class;
1091 dev_set_name(&dev->dev, "nfc%d", dev->idx);
1092 device_initialize(&dev->dev);
1094 mutex_lock(&nfc_devlist_mutex);
1095 nfc_devlist_generation++;
1096 rc = device_add(&dev->dev);
1097 mutex_unlock(&nfc_devlist_mutex);
1102 rc = nfc_llcp_register_device(dev);
1104 pr_err("Could not register llcp device\n");
1106 rc = nfc_genl_device_added(dev);
1108 pr_debug("The userspace won't be notified that the device %s was added\n",
1109 dev_name(&dev->dev));
1111 dev->rfkill = rfkill_alloc(dev_name(&dev->dev), &dev->dev,
1112 RFKILL_TYPE_NFC, &nfc_rfkill_ops, dev);
1114 if (rfkill_register(dev->rfkill) < 0) {
1115 rfkill_destroy(dev->rfkill);
1122 EXPORT_SYMBOL(nfc_register_device);
1125 * nfc_unregister_device - unregister a nfc device in the nfc subsystem
1127 * @dev: The nfc device to unregister
1129 void nfc_unregister_device(struct nfc_dev *dev)
1133 pr_debug("dev_name=%s\n", dev_name(&dev->dev));
1138 rfkill_unregister(dev->rfkill);
1139 rfkill_destroy(dev->rfkill);
1142 if (dev->ops->check_presence) {
1143 device_lock(&dev->dev);
1144 dev->shutting_down = true;
1145 device_unlock(&dev->dev);
1146 del_timer_sync(&dev->check_pres_timer);
1147 cancel_work_sync(&dev->check_pres_work);
1150 rc = nfc_genl_device_removed(dev);
1152 pr_debug("The userspace won't be notified that the device %s "
1153 "was removed\n", dev_name(&dev->dev));
1155 nfc_llcp_unregister_device(dev);
1157 mutex_lock(&nfc_devlist_mutex);
1158 nfc_devlist_generation++;
1159 device_del(&dev->dev);
1160 mutex_unlock(&nfc_devlist_mutex);
1162 ida_simple_remove(&nfc_index_ida, id);
1164 EXPORT_SYMBOL(nfc_unregister_device);
1166 static int __init nfc_init(void)
1170 pr_info("NFC Core ver %s\n", VERSION);
1172 rc = class_register(&nfc_class);
1176 rc = nfc_genl_init();
1180 /* the first generation must not be 0 */
1181 nfc_devlist_generation = 1;
1183 rc = rawsock_init();
1187 rc = nfc_llcp_init();
1204 class_unregister(&nfc_class);
1208 static void __exit nfc_exit(void)
1214 class_unregister(&nfc_class);
1217 subsys_initcall(nfc_init);
1218 module_exit(nfc_exit);
1220 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
1221 MODULE_DESCRIPTION("NFC Core ver " VERSION);
1222 MODULE_VERSION(VERSION);
1223 MODULE_LICENSE("GPL");
1224 MODULE_ALIAS_NETPROTO(PF_NFC);
1225 MODULE_ALIAS_GENL_FAMILY(NFC_GENL_NAME);