1 // SPDX-License-Identifier: GPL-2.0-only
3 * The NFC Controller Interface is the communication protocol between an
4 * NFC Controller (NFCC) and a Device Host (DH).
6 * Copyright (C) 2011 Texas Instruments, Inc.
7 * Copyright (C) 2014 Marvell International Ltd.
9 * Written by Ilan Elias <ilane@ti.com>
12 * This file is based on hci_core.c, which was written
13 * by Maxim Krasnyansky.
16 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/workqueue.h>
22 #include <linux/completion.h>
23 #include <linux/export.h>
24 #include <linux/sched.h>
25 #include <linux/bitops.h>
26 #include <linux/skbuff.h>
29 #include <net/nfc/nci.h>
30 #include <net/nfc/nci_core.h>
31 #include <linux/nfc.h>
33 struct core_conn_create_data {
35 struct nci_core_conn_create_cmd *cmd;
38 static void nci_cmd_work(struct work_struct *work);
39 static void nci_rx_work(struct work_struct *work);
40 static void nci_tx_work(struct work_struct *work);
42 struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
45 struct nci_conn_info *conn_info;
47 list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
48 if (conn_info->conn_id == conn_id)
55 int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
56 const struct dest_spec_params *params)
58 const struct nci_conn_info *conn_info;
60 list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
61 if (conn_info->dest_type == dest_type) {
63 return conn_info->conn_id;
65 if (params->id == conn_info->dest_params->id &&
66 params->protocol == conn_info->dest_params->protocol)
67 return conn_info->conn_id;
73 EXPORT_SYMBOL(nci_get_conn_info_by_dest_type_params);
75 /* ---- NCI requests ---- */
77 void nci_req_complete(struct nci_dev *ndev, int result)
79 if (ndev->req_status == NCI_REQ_PEND) {
80 ndev->req_result = result;
81 ndev->req_status = NCI_REQ_DONE;
82 complete(&ndev->req_completion);
85 EXPORT_SYMBOL(nci_req_complete);
87 static void nci_req_cancel(struct nci_dev *ndev, int err)
89 if (ndev->req_status == NCI_REQ_PEND) {
90 ndev->req_result = err;
91 ndev->req_status = NCI_REQ_CANCELED;
92 complete(&ndev->req_completion);
96 /* Execute request and wait for completion. */
97 static int __nci_request(struct nci_dev *ndev,
98 void (*req)(struct nci_dev *ndev, const void *opt),
99 const void *opt, __u32 timeout)
104 ndev->req_status = NCI_REQ_PEND;
106 reinit_completion(&ndev->req_completion);
109 wait_for_completion_interruptible_timeout(&ndev->req_completion,
112 pr_debug("wait_for_completion return %ld\n", completion_rc);
114 if (completion_rc > 0) {
115 switch (ndev->req_status) {
117 rc = nci_to_errno(ndev->req_result);
120 case NCI_REQ_CANCELED:
121 rc = -ndev->req_result;
129 pr_err("wait_for_completion_interruptible_timeout failed %ld\n",
132 rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc));
135 ndev->req_status = ndev->req_result = 0;
140 inline int nci_request(struct nci_dev *ndev,
141 void (*req)(struct nci_dev *ndev,
143 const void *opt, __u32 timeout)
147 /* Serialize all requests */
148 mutex_lock(&ndev->req_lock);
149 /* check the state after obtaing the lock against any races
150 * from nci_close_device when the device gets removed.
152 if (test_bit(NCI_UP, &ndev->flags))
153 rc = __nci_request(ndev, req, opt, timeout);
156 mutex_unlock(&ndev->req_lock);
161 static void nci_reset_req(struct nci_dev *ndev, const void *opt)
163 struct nci_core_reset_cmd cmd;
165 cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG;
166 nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd);
169 static void nci_init_req(struct nci_dev *ndev, const void *opt)
174 plen = sizeof(struct nci_core_init_v2_cmd);
176 nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, plen, opt);
179 static void nci_init_complete_req(struct nci_dev *ndev, const void *opt)
181 struct nci_rf_disc_map_cmd cmd;
182 struct disc_map_config *cfg = cmd.mapping_configs;
183 __u8 *num = &cmd.num_mapping_configs;
186 /* set rf mapping configurations */
189 /* by default mapping is set to NCI_RF_INTERFACE_FRAME */
190 for (i = 0; i < ndev->num_supported_rf_interfaces; i++) {
191 if (ndev->supported_rf_interfaces[i] ==
192 NCI_RF_INTERFACE_ISO_DEP) {
193 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
194 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
195 NCI_DISC_MAP_MODE_LISTEN;
196 cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP;
198 } else if (ndev->supported_rf_interfaces[i] ==
199 NCI_RF_INTERFACE_NFC_DEP) {
200 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
201 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
202 NCI_DISC_MAP_MODE_LISTEN;
203 cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP;
207 if (*num == NCI_MAX_NUM_MAPPING_CONFIGS)
211 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD,
212 (1 + ((*num) * sizeof(struct disc_map_config))), &cmd);
215 struct nci_set_config_param {
221 static void nci_set_config_req(struct nci_dev *ndev, const void *opt)
223 const struct nci_set_config_param *param = opt;
224 struct nci_core_set_config_cmd cmd;
226 BUG_ON(param->len > NCI_MAX_PARAM_LEN);
229 cmd.param.id = param->id;
230 cmd.param.len = param->len;
231 memcpy(cmd.param.val, param->val, param->len);
233 nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd);
236 struct nci_rf_discover_param {
241 static void nci_rf_discover_req(struct nci_dev *ndev, const void *opt)
243 const struct nci_rf_discover_param *param = opt;
244 struct nci_rf_disc_cmd cmd;
246 cmd.num_disc_configs = 0;
248 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
249 (param->im_protocols & NFC_PROTO_JEWEL_MASK ||
250 param->im_protocols & NFC_PROTO_MIFARE_MASK ||
251 param->im_protocols & NFC_PROTO_ISO14443_MASK ||
252 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
253 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
254 NCI_NFC_A_PASSIVE_POLL_MODE;
255 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
256 cmd.num_disc_configs++;
259 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
260 (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) {
261 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
262 NCI_NFC_B_PASSIVE_POLL_MODE;
263 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
264 cmd.num_disc_configs++;
267 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
268 (param->im_protocols & NFC_PROTO_FELICA_MASK ||
269 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
270 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
271 NCI_NFC_F_PASSIVE_POLL_MODE;
272 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
273 cmd.num_disc_configs++;
276 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
277 (param->im_protocols & NFC_PROTO_ISO15693_MASK)) {
278 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
279 NCI_NFC_V_PASSIVE_POLL_MODE;
280 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
281 cmd.num_disc_configs++;
284 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) &&
285 (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) {
286 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
287 NCI_NFC_A_PASSIVE_LISTEN_MODE;
288 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
289 cmd.num_disc_configs++;
290 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
291 NCI_NFC_F_PASSIVE_LISTEN_MODE;
292 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
293 cmd.num_disc_configs++;
296 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
297 (1 + (cmd.num_disc_configs * sizeof(struct disc_config))),
301 struct nci_rf_discover_select_param {
302 __u8 rf_discovery_id;
306 static void nci_rf_discover_select_req(struct nci_dev *ndev, const void *opt)
308 const struct nci_rf_discover_select_param *param = opt;
309 struct nci_rf_discover_select_cmd cmd;
311 cmd.rf_discovery_id = param->rf_discovery_id;
312 cmd.rf_protocol = param->rf_protocol;
314 switch (cmd.rf_protocol) {
315 case NCI_RF_PROTOCOL_ISO_DEP:
316 cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP;
319 case NCI_RF_PROTOCOL_NFC_DEP:
320 cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP;
324 cmd.rf_interface = NCI_RF_INTERFACE_FRAME;
328 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD,
329 sizeof(struct nci_rf_discover_select_cmd), &cmd);
332 static void nci_rf_deactivate_req(struct nci_dev *ndev, const void *opt)
334 struct nci_rf_deactivate_cmd cmd;
336 cmd.type = (unsigned long)opt;
338 nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD,
339 sizeof(struct nci_rf_deactivate_cmd), &cmd);
342 struct nci_cmd_param {
348 static void nci_generic_req(struct nci_dev *ndev, const void *opt)
350 const struct nci_cmd_param *param = opt;
352 nci_send_cmd(ndev, param->opcode, param->len, param->payload);
355 int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, const __u8 *payload)
357 struct nci_cmd_param param;
359 param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid);
361 param.payload = payload;
363 return __nci_request(ndev, nci_generic_req, ¶m,
364 msecs_to_jiffies(NCI_CMD_TIMEOUT));
366 EXPORT_SYMBOL(nci_prop_cmd);
368 int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len,
371 struct nci_cmd_param param;
373 param.opcode = opcode;
375 param.payload = payload;
377 return __nci_request(ndev, nci_generic_req, ¶m,
378 msecs_to_jiffies(NCI_CMD_TIMEOUT));
380 EXPORT_SYMBOL(nci_core_cmd);
382 int nci_core_reset(struct nci_dev *ndev)
384 return __nci_request(ndev, nci_reset_req, (void *)0,
385 msecs_to_jiffies(NCI_RESET_TIMEOUT));
387 EXPORT_SYMBOL(nci_core_reset);
389 int nci_core_init(struct nci_dev *ndev)
391 return __nci_request(ndev, nci_init_req, (void *)0,
392 msecs_to_jiffies(NCI_INIT_TIMEOUT));
394 EXPORT_SYMBOL(nci_core_init);
396 struct nci_loopback_data {
398 struct sk_buff *data;
401 static void nci_send_data_req(struct nci_dev *ndev, const void *opt)
403 const struct nci_loopback_data *data = opt;
405 nci_send_data(ndev, data->conn_id, data->data);
408 static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err)
410 struct nci_dev *ndev = (struct nci_dev *)context;
411 struct nci_conn_info *conn_info;
413 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
415 nci_req_complete(ndev, NCI_STATUS_REJECTED);
419 conn_info->rx_skb = skb;
421 nci_req_complete(ndev, NCI_STATUS_OK);
424 int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len,
425 struct sk_buff **resp)
428 struct nci_loopback_data loopback_data;
429 struct nci_conn_info *conn_info;
431 int conn_id = nci_get_conn_info_by_dest_type_params(ndev,
432 NCI_DESTINATION_NFCC_LOOPBACK, NULL);
435 r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK,
437 if (r != NCI_STATUS_OK)
440 conn_id = nci_get_conn_info_by_dest_type_params(ndev,
441 NCI_DESTINATION_NFCC_LOOPBACK,
445 conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
449 /* store cb and context to be used on receiving data */
450 conn_info->data_exchange_cb = nci_nfcc_loopback_cb;
451 conn_info->data_exchange_cb_context = ndev;
453 skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL);
457 skb_reserve(skb, NCI_DATA_HDR_SIZE);
458 skb_put_data(skb, data, data_len);
460 loopback_data.conn_id = conn_id;
461 loopback_data.data = skb;
463 ndev->cur_conn_id = conn_id;
464 r = nci_request(ndev, nci_send_data_req, &loopback_data,
465 msecs_to_jiffies(NCI_DATA_TIMEOUT));
466 if (r == NCI_STATUS_OK && resp)
467 *resp = conn_info->rx_skb;
471 EXPORT_SYMBOL(nci_nfcc_loopback);
473 static int nci_open_device(struct nci_dev *ndev)
477 mutex_lock(&ndev->req_lock);
479 if (test_bit(NCI_UP, &ndev->flags)) {
484 if (ndev->ops->open(ndev)) {
489 atomic_set(&ndev->cmd_cnt, 1);
491 set_bit(NCI_INIT, &ndev->flags);
494 rc = ndev->ops->init(ndev);
497 rc = __nci_request(ndev, nci_reset_req, (void *)0,
498 msecs_to_jiffies(NCI_RESET_TIMEOUT));
501 if (!rc && ndev->ops->setup) {
502 rc = ndev->ops->setup(ndev);
506 struct nci_core_init_v2_cmd nci_init_v2_cmd = {
507 .feature1 = NCI_FEATURE_DISABLE,
508 .feature2 = NCI_FEATURE_DISABLE
510 const void *opt = NULL;
512 if (ndev->nci_ver & NCI_VER_2_MASK)
513 opt = &nci_init_v2_cmd;
515 rc = __nci_request(ndev, nci_init_req, opt,
516 msecs_to_jiffies(NCI_INIT_TIMEOUT));
519 if (!rc && ndev->ops->post_setup)
520 rc = ndev->ops->post_setup(ndev);
523 rc = __nci_request(ndev, nci_init_complete_req, (void *)0,
524 msecs_to_jiffies(NCI_INIT_TIMEOUT));
527 clear_bit(NCI_INIT, &ndev->flags);
530 set_bit(NCI_UP, &ndev->flags);
531 nci_clear_target_list(ndev);
532 atomic_set(&ndev->state, NCI_IDLE);
534 /* Init failed, cleanup */
535 skb_queue_purge(&ndev->cmd_q);
536 skb_queue_purge(&ndev->rx_q);
537 skb_queue_purge(&ndev->tx_q);
539 ndev->ops->close(ndev);
544 mutex_unlock(&ndev->req_lock);
548 static int nci_close_device(struct nci_dev *ndev)
550 nci_req_cancel(ndev, ENODEV);
551 mutex_lock(&ndev->req_lock);
553 if (!test_and_clear_bit(NCI_UP, &ndev->flags)) {
554 del_timer_sync(&ndev->cmd_timer);
555 del_timer_sync(&ndev->data_timer);
556 mutex_unlock(&ndev->req_lock);
560 /* Drop RX and TX queues */
561 skb_queue_purge(&ndev->rx_q);
562 skb_queue_purge(&ndev->tx_q);
564 /* Flush RX and TX wq */
565 flush_workqueue(ndev->rx_wq);
566 flush_workqueue(ndev->tx_wq);
569 skb_queue_purge(&ndev->cmd_q);
570 atomic_set(&ndev->cmd_cnt, 1);
572 set_bit(NCI_INIT, &ndev->flags);
573 __nci_request(ndev, nci_reset_req, (void *)0,
574 msecs_to_jiffies(NCI_RESET_TIMEOUT));
576 /* After this point our queues are empty
577 * and no works are scheduled.
579 ndev->ops->close(ndev);
581 clear_bit(NCI_INIT, &ndev->flags);
584 flush_workqueue(ndev->cmd_wq);
586 del_timer_sync(&ndev->cmd_timer);
591 mutex_unlock(&ndev->req_lock);
596 /* NCI command timer function */
597 static void nci_cmd_timer(struct timer_list *t)
599 struct nci_dev *ndev = from_timer(ndev, t, cmd_timer);
601 atomic_set(&ndev->cmd_cnt, 1);
602 queue_work(ndev->cmd_wq, &ndev->cmd_work);
605 /* NCI data exchange timer function */
606 static void nci_data_timer(struct timer_list *t)
608 struct nci_dev *ndev = from_timer(ndev, t, data_timer);
610 set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
611 queue_work(ndev->rx_wq, &ndev->rx_work);
614 static int nci_dev_up(struct nfc_dev *nfc_dev)
616 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
618 return nci_open_device(ndev);
621 static int nci_dev_down(struct nfc_dev *nfc_dev)
623 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
625 return nci_close_device(ndev);
628 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val)
630 struct nci_set_config_param param;
639 return __nci_request(ndev, nci_set_config_req, ¶m,
640 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
642 EXPORT_SYMBOL(nci_set_config);
644 static void nci_nfcee_discover_req(struct nci_dev *ndev, const void *opt)
646 struct nci_nfcee_discover_cmd cmd;
647 __u8 action = (unsigned long)opt;
649 cmd.discovery_action = action;
651 nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd);
654 int nci_nfcee_discover(struct nci_dev *ndev, u8 action)
656 unsigned long opt = action;
658 return __nci_request(ndev, nci_nfcee_discover_req, (void *)opt,
659 msecs_to_jiffies(NCI_CMD_TIMEOUT));
661 EXPORT_SYMBOL(nci_nfcee_discover);
663 static void nci_nfcee_mode_set_req(struct nci_dev *ndev, const void *opt)
665 const struct nci_nfcee_mode_set_cmd *cmd = opt;
667 nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD,
668 sizeof(struct nci_nfcee_mode_set_cmd), cmd);
671 int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode)
673 struct nci_nfcee_mode_set_cmd cmd;
675 cmd.nfcee_id = nfcee_id;
676 cmd.nfcee_mode = nfcee_mode;
678 return __nci_request(ndev, nci_nfcee_mode_set_req, &cmd,
679 msecs_to_jiffies(NCI_CMD_TIMEOUT));
681 EXPORT_SYMBOL(nci_nfcee_mode_set);
683 static void nci_core_conn_create_req(struct nci_dev *ndev, const void *opt)
685 const struct core_conn_create_data *data = opt;
687 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd);
690 int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
691 u8 number_destination_params,
693 const struct core_conn_create_dest_spec_params *params)
696 struct nci_core_conn_create_cmd *cmd;
697 struct core_conn_create_data data;
699 data.length = params_len + sizeof(struct nci_core_conn_create_cmd);
700 cmd = kzalloc(data.length, GFP_KERNEL);
704 cmd->destination_type = destination_type;
705 cmd->number_destination_params = number_destination_params;
710 memcpy(cmd->params, params, params_len);
711 if (params->length > 0)
712 memcpy(&ndev->cur_params,
713 ¶ms->value[DEST_SPEC_PARAMS_ID_INDEX],
714 sizeof(struct dest_spec_params));
716 ndev->cur_params.id = 0;
718 ndev->cur_params.id = 0;
720 ndev->cur_dest_type = destination_type;
722 r = __nci_request(ndev, nci_core_conn_create_req, &data,
723 msecs_to_jiffies(NCI_CMD_TIMEOUT));
727 EXPORT_SYMBOL(nci_core_conn_create);
729 static void nci_core_conn_close_req(struct nci_dev *ndev, const void *opt)
731 __u8 conn_id = (unsigned long)opt;
733 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id);
736 int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id)
738 unsigned long opt = conn_id;
740 ndev->cur_conn_id = conn_id;
741 return __nci_request(ndev, nci_core_conn_close_req, (void *)opt,
742 msecs_to_jiffies(NCI_CMD_TIMEOUT));
744 EXPORT_SYMBOL(nci_core_conn_close);
746 static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
748 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
749 struct nci_set_config_param param;
752 param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len);
753 if ((param.val == NULL) || (param.len == 0))
756 if (param.len > NFC_MAX_GT_LEN)
759 param.id = NCI_PN_ATR_REQ_GEN_BYTES;
761 rc = nci_request(ndev, nci_set_config_req, ¶m,
762 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
766 param.id = NCI_LN_ATR_RES_GEN_BYTES;
768 return nci_request(ndev, nci_set_config_req, ¶m,
769 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
772 static int nci_set_listen_parameters(struct nfc_dev *nfc_dev)
774 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
778 val = NCI_LA_SEL_INFO_NFC_DEP_MASK;
780 rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val);
784 val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK;
786 rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val);
790 val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424;
792 return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val);
795 static int nci_start_poll(struct nfc_dev *nfc_dev,
796 __u32 im_protocols, __u32 tm_protocols)
798 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
799 struct nci_rf_discover_param param;
802 if ((atomic_read(&ndev->state) == NCI_DISCOVERY) ||
803 (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) {
804 pr_err("unable to start poll, since poll is already active\n");
808 if (ndev->target_active_prot) {
809 pr_err("there is an active target\n");
813 if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) ||
814 (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) {
815 pr_debug("target active or w4 select, implicitly deactivate\n");
817 rc = nci_request(ndev, nci_rf_deactivate_req,
818 (void *)NCI_DEACTIVATE_TYPE_IDLE_MODE,
819 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
824 if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
825 rc = nci_set_local_general_bytes(nfc_dev);
827 pr_err("failed to set local general bytes\n");
832 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
833 rc = nci_set_listen_parameters(nfc_dev);
835 pr_err("failed to set listen parameters\n");
838 param.im_protocols = im_protocols;
839 param.tm_protocols = tm_protocols;
840 rc = nci_request(ndev, nci_rf_discover_req, ¶m,
841 msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
844 ndev->poll_prots = im_protocols;
849 static void nci_stop_poll(struct nfc_dev *nfc_dev)
851 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
853 if ((atomic_read(&ndev->state) != NCI_DISCOVERY) &&
854 (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) {
855 pr_err("unable to stop poll, since poll is not active\n");
859 nci_request(ndev, nci_rf_deactivate_req,
860 (void *)NCI_DEACTIVATE_TYPE_IDLE_MODE,
861 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
864 static int nci_activate_target(struct nfc_dev *nfc_dev,
865 struct nfc_target *target, __u32 protocol)
867 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
868 struct nci_rf_discover_select_param param;
869 const struct nfc_target *nci_target = NULL;
873 pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol);
875 if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) &&
876 (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
877 pr_err("there is no available target to activate\n");
881 if (ndev->target_active_prot) {
882 pr_err("there is already an active target\n");
886 for (i = 0; i < ndev->n_targets; i++) {
887 if (ndev->targets[i].idx == target->idx) {
888 nci_target = &ndev->targets[i];
894 pr_err("unable to find the selected target\n");
898 if (!(nci_target->supported_protocols & (1 << protocol))) {
899 pr_err("target does not support the requested protocol 0x%x\n",
904 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
905 param.rf_discovery_id = nci_target->logical_idx;
907 if (protocol == NFC_PROTO_JEWEL)
908 param.rf_protocol = NCI_RF_PROTOCOL_T1T;
909 else if (protocol == NFC_PROTO_MIFARE)
910 param.rf_protocol = NCI_RF_PROTOCOL_T2T;
911 else if (protocol == NFC_PROTO_FELICA)
912 param.rf_protocol = NCI_RF_PROTOCOL_T3T;
913 else if (protocol == NFC_PROTO_ISO14443 ||
914 protocol == NFC_PROTO_ISO14443_B)
915 param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
917 param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
919 rc = nci_request(ndev, nci_rf_discover_select_req, ¶m,
920 msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT));
924 ndev->target_active_prot = protocol;
929 static void nci_deactivate_target(struct nfc_dev *nfc_dev,
930 struct nfc_target *target,
933 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
934 unsigned long nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE;
938 if (!ndev->target_active_prot) {
939 pr_err("unable to deactivate target, no active target\n");
943 ndev->target_active_prot = 0;
946 case NFC_TARGET_MODE_SLEEP:
947 nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE;
951 if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
952 nci_request(ndev, nci_rf_deactivate_req, (void *)nci_mode,
953 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
957 static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
958 __u8 comm_mode, __u8 *gb, size_t gb_len)
960 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
963 pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
965 rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
969 rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
970 ndev->remote_gb_len);
972 rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
978 static int nci_dep_link_down(struct nfc_dev *nfc_dev)
980 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
985 if (nfc_dev->rf_mode == NFC_RF_INITIATOR) {
986 nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE);
988 if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE ||
989 atomic_read(&ndev->state) == NCI_DISCOVERY) {
990 nci_request(ndev, nci_rf_deactivate_req, (void *)0,
991 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
994 rc = nfc_tm_deactivated(nfc_dev);
996 pr_err("error when signaling tm deactivation\n");
1003 static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
1004 struct sk_buff *skb,
1005 data_exchange_cb_t cb, void *cb_context)
1007 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1009 struct nci_conn_info *conn_info;
1011 conn_info = ndev->rf_conn_info;
1015 pr_debug("target_idx %d, len %d\n", target->idx, skb->len);
1017 if (!ndev->target_active_prot) {
1018 pr_err("unable to exchange data, no active target\n");
1022 if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1025 /* store cb and context to be used on receiving data */
1026 conn_info->data_exchange_cb = cb;
1027 conn_info->data_exchange_cb_context = cb_context;
1029 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1031 clear_bit(NCI_DATA_EXCHANGE, &ndev->flags);
1036 static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
1038 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1041 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1043 pr_err("unable to send data\n");
1048 static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1050 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1052 if (ndev->ops->enable_se)
1053 return ndev->ops->enable_se(ndev, se_idx);
1058 static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1060 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1062 if (ndev->ops->disable_se)
1063 return ndev->ops->disable_se(ndev, se_idx);
1068 static int nci_discover_se(struct nfc_dev *nfc_dev)
1071 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1073 if (ndev->ops->discover_se) {
1074 r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE);
1075 if (r != NCI_STATUS_OK)
1078 return ndev->ops->discover_se(ndev);
1084 static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx,
1085 u8 *apdu, size_t apdu_length,
1086 se_io_cb_t cb, void *cb_context)
1088 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1090 if (ndev->ops->se_io)
1091 return ndev->ops->se_io(ndev, se_idx, apdu,
1092 apdu_length, cb, cb_context);
1097 static int nci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name)
1099 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1101 if (!ndev->ops->fw_download)
1104 return ndev->ops->fw_download(ndev, firmware_name);
1107 static const struct nfc_ops nci_nfc_ops = {
1108 .dev_up = nci_dev_up,
1109 .dev_down = nci_dev_down,
1110 .start_poll = nci_start_poll,
1111 .stop_poll = nci_stop_poll,
1112 .dep_link_up = nci_dep_link_up,
1113 .dep_link_down = nci_dep_link_down,
1114 .activate_target = nci_activate_target,
1115 .deactivate_target = nci_deactivate_target,
1116 .im_transceive = nci_transceive,
1117 .tm_send = nci_tm_send,
1118 .enable_se = nci_enable_se,
1119 .disable_se = nci_disable_se,
1120 .discover_se = nci_discover_se,
1122 .fw_download = nci_fw_download,
1125 /* ---- Interface to NCI drivers ---- */
1127 * nci_allocate_device - allocate a new nci device
1129 * @ops: device operations
1130 * @supported_protocols: NFC protocols supported by the device
1131 * @tx_headroom: Reserved space at beginning of skb
1132 * @tx_tailroom: Reserved space at end of skb
1134 struct nci_dev *nci_allocate_device(const struct nci_ops *ops,
1135 __u32 supported_protocols,
1136 int tx_headroom, int tx_tailroom)
1138 struct nci_dev *ndev;
1140 pr_debug("supported_protocols 0x%x\n", supported_protocols);
1142 if (!ops->open || !ops->close || !ops->send)
1145 if (!supported_protocols)
1148 ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL);
1154 if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) {
1155 pr_err("Too many proprietary commands: %zd\n",
1160 ndev->tx_headroom = tx_headroom;
1161 ndev->tx_tailroom = tx_tailroom;
1162 init_completion(&ndev->req_completion);
1164 ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
1165 supported_protocols,
1166 tx_headroom + NCI_DATA_HDR_SIZE,
1171 ndev->hci_dev = nci_hci_allocate(ndev);
1175 nfc_set_drvdata(ndev->nfc_dev, ndev);
1180 nfc_free_device(ndev->nfc_dev);
1185 EXPORT_SYMBOL(nci_allocate_device);
1188 * nci_free_device - deallocate nci device
1190 * @ndev: The nci device to deallocate
1192 void nci_free_device(struct nci_dev *ndev)
1194 nfc_free_device(ndev->nfc_dev);
1195 nci_hci_deallocate(ndev);
1198 EXPORT_SYMBOL(nci_free_device);
1201 * nci_register_device - register a nci device in the nfc subsystem
1203 * @ndev: The nci device to register
1205 int nci_register_device(struct nci_dev *ndev)
1208 struct device *dev = &ndev->nfc_dev->dev;
1213 INIT_WORK(&ndev->cmd_work, nci_cmd_work);
1214 snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev));
1215 ndev->cmd_wq = create_singlethread_workqueue(name);
1216 if (!ndev->cmd_wq) {
1221 INIT_WORK(&ndev->rx_work, nci_rx_work);
1222 snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev));
1223 ndev->rx_wq = create_singlethread_workqueue(name);
1226 goto destroy_cmd_wq_exit;
1229 INIT_WORK(&ndev->tx_work, nci_tx_work);
1230 snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev));
1231 ndev->tx_wq = create_singlethread_workqueue(name);
1234 goto destroy_rx_wq_exit;
1237 skb_queue_head_init(&ndev->cmd_q);
1238 skb_queue_head_init(&ndev->rx_q);
1239 skb_queue_head_init(&ndev->tx_q);
1241 timer_setup(&ndev->cmd_timer, nci_cmd_timer, 0);
1242 timer_setup(&ndev->data_timer, nci_data_timer, 0);
1244 mutex_init(&ndev->req_lock);
1245 INIT_LIST_HEAD(&ndev->conn_info_list);
1247 rc = nfc_register_device(ndev->nfc_dev);
1249 goto destroy_tx_wq_exit;
1254 destroy_workqueue(ndev->tx_wq);
1257 destroy_workqueue(ndev->rx_wq);
1259 destroy_cmd_wq_exit:
1260 destroy_workqueue(ndev->cmd_wq);
1265 EXPORT_SYMBOL(nci_register_device);
1268 * nci_unregister_device - unregister a nci device in the nfc subsystem
1270 * @ndev: The nci device to unregister
1272 void nci_unregister_device(struct nci_dev *ndev)
1274 struct nci_conn_info *conn_info, *n;
1276 nci_close_device(ndev);
1278 destroy_workqueue(ndev->cmd_wq);
1279 destroy_workqueue(ndev->rx_wq);
1280 destroy_workqueue(ndev->tx_wq);
1282 list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) {
1283 list_del(&conn_info->list);
1284 /* conn_info is allocated with devm_kzalloc */
1287 nfc_unregister_device(ndev->nfc_dev);
1289 EXPORT_SYMBOL(nci_unregister_device);
1292 * nci_recv_frame - receive frame from NCI drivers
1294 * @ndev: The nci device
1295 * @skb: The sk_buff to receive
1297 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
1299 pr_debug("len %d\n", skb->len);
1301 if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
1302 !test_bit(NCI_INIT, &ndev->flags))) {
1307 /* Queue frame for rx worker thread */
1308 skb_queue_tail(&ndev->rx_q, skb);
1309 queue_work(ndev->rx_wq, &ndev->rx_work);
1313 EXPORT_SYMBOL(nci_recv_frame);
1315 int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb)
1317 pr_debug("len %d\n", skb->len);
1324 /* Get rid of skb owner, prior to sending to the driver. */
1327 /* Send copy to sniffer */
1328 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1329 RAW_PAYLOAD_NCI, NFC_DIRECTION_TX);
1331 return ndev->ops->send(ndev, skb);
1333 EXPORT_SYMBOL(nci_send_frame);
1335 /* Send NCI command */
1336 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, const void *payload)
1338 struct nci_ctrl_hdr *hdr;
1339 struct sk_buff *skb;
1341 pr_debug("opcode 0x%x, plen %d\n", opcode, plen);
1343 skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL);
1345 pr_err("no memory for command\n");
1349 hdr = skb_put(skb, NCI_CTRL_HDR_SIZE);
1350 hdr->gid = nci_opcode_gid(opcode);
1351 hdr->oid = nci_opcode_oid(opcode);
1354 nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT);
1355 nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST);
1358 skb_put_data(skb, payload, plen);
1360 skb_queue_tail(&ndev->cmd_q, skb);
1361 queue_work(ndev->cmd_wq, &ndev->cmd_work);
1365 EXPORT_SYMBOL(nci_send_cmd);
1367 /* Proprietary commands API */
1368 static const struct nci_driver_ops *ops_cmd_lookup(const struct nci_driver_ops *ops,
1373 const struct nci_driver_ops *op;
1378 for (i = 0; i < n_ops; i++) {
1380 if (op->opcode == opcode)
1387 static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode,
1388 struct sk_buff *skb, const struct nci_driver_ops *ops,
1391 const struct nci_driver_ops *op;
1393 op = ops_cmd_lookup(ops, n_ops, rsp_opcode);
1394 if (!op || !op->rsp)
1397 return op->rsp(ndev, skb);
1400 static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode,
1401 struct sk_buff *skb, const struct nci_driver_ops *ops,
1404 const struct nci_driver_ops *op;
1406 op = ops_cmd_lookup(ops, n_ops, ntf_opcode);
1407 if (!op || !op->ntf)
1410 return op->ntf(ndev, skb);
1413 int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1414 struct sk_buff *skb)
1416 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1417 ndev->ops->n_prop_ops);
1420 int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1421 struct sk_buff *skb)
1423 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1424 ndev->ops->n_prop_ops);
1427 int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1428 struct sk_buff *skb)
1430 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops,
1431 ndev->ops->n_core_ops);
1434 int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1435 struct sk_buff *skb)
1437 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops,
1438 ndev->ops->n_core_ops);
1441 /* ---- NCI TX Data worker thread ---- */
1443 static void nci_tx_work(struct work_struct *work)
1445 struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work);
1446 struct nci_conn_info *conn_info;
1447 struct sk_buff *skb;
1449 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
1453 pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt));
1455 /* Send queued tx data */
1456 while (atomic_read(&conn_info->credits_cnt)) {
1457 skb = skb_dequeue(&ndev->tx_q);
1461 /* Check if data flow control is used */
1462 if (atomic_read(&conn_info->credits_cnt) !=
1463 NCI_DATA_FLOW_CONTROL_NOT_USED)
1464 atomic_dec(&conn_info->credits_cnt);
1466 pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n",
1468 nci_conn_id(skb->data),
1469 nci_plen(skb->data));
1471 nci_send_frame(ndev, skb);
1473 mod_timer(&ndev->data_timer,
1474 jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT));
1478 /* ----- NCI RX worker thread (data & control) ----- */
1480 static void nci_rx_work(struct work_struct *work)
1482 struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work);
1483 struct sk_buff *skb;
1485 while ((skb = skb_dequeue(&ndev->rx_q))) {
1487 /* Send copy to sniffer */
1488 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1489 RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);
1492 switch (nci_mt(skb->data)) {
1493 case NCI_MT_RSP_PKT:
1494 nci_rsp_packet(ndev, skb);
1497 case NCI_MT_NTF_PKT:
1498 nci_ntf_packet(ndev, skb);
1501 case NCI_MT_DATA_PKT:
1502 nci_rx_data_packet(ndev, skb);
1506 pr_err("unknown MT 0x%x\n", nci_mt(skb->data));
1512 /* check if a data exchange timeout has occurred */
1513 if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) {
1514 /* complete the data exchange transaction, if exists */
1515 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1516 nci_data_exchange_complete(ndev, NULL,
1520 clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
1524 /* ----- NCI TX CMD worker thread ----- */
1526 static void nci_cmd_work(struct work_struct *work)
1528 struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work);
1529 struct sk_buff *skb;
1531 pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt));
1533 /* Send queued command */
1534 if (atomic_read(&ndev->cmd_cnt)) {
1535 skb = skb_dequeue(&ndev->cmd_q);
1539 atomic_dec(&ndev->cmd_cnt);
1541 pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
1543 nci_opcode_gid(nci_opcode(skb->data)),
1544 nci_opcode_oid(nci_opcode(skb->data)),
1545 nci_plen(skb->data));
1547 nci_send_frame(ndev, skb);
1549 mod_timer(&ndev->cmd_timer,
1550 jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT));
1554 MODULE_LICENSE("GPL");