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.
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 struct dest_spec_params *params)
58 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, unsigned long opt),
99 unsigned long 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 unsigned long opt, __u32 timeout)
147 if (!test_bit(NCI_UP, &ndev->flags))
150 /* Serialize all requests */
151 mutex_lock(&ndev->req_lock);
152 rc = __nci_request(ndev, req, opt, timeout);
153 mutex_unlock(&ndev->req_lock);
158 static void nci_reset_req(struct nci_dev *ndev, unsigned long opt)
160 struct nci_core_reset_cmd cmd;
162 cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG;
163 nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd);
166 static void nci_init_req(struct nci_dev *ndev, unsigned long opt)
168 nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, 0, NULL);
171 static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt)
173 struct nci_rf_disc_map_cmd cmd;
174 struct disc_map_config *cfg = cmd.mapping_configs;
175 __u8 *num = &cmd.num_mapping_configs;
178 /* set rf mapping configurations */
181 /* by default mapping is set to NCI_RF_INTERFACE_FRAME */
182 for (i = 0; i < ndev->num_supported_rf_interfaces; i++) {
183 if (ndev->supported_rf_interfaces[i] ==
184 NCI_RF_INTERFACE_ISO_DEP) {
185 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
186 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
187 NCI_DISC_MAP_MODE_LISTEN;
188 cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP;
190 } else if (ndev->supported_rf_interfaces[i] ==
191 NCI_RF_INTERFACE_NFC_DEP) {
192 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
193 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
194 NCI_DISC_MAP_MODE_LISTEN;
195 cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP;
199 if (*num == NCI_MAX_NUM_MAPPING_CONFIGS)
203 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD,
204 (1 + ((*num) * sizeof(struct disc_map_config))), &cmd);
207 struct nci_set_config_param {
213 static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt)
215 struct nci_set_config_param *param = (struct nci_set_config_param *)opt;
216 struct nci_core_set_config_cmd cmd;
218 BUG_ON(param->len > NCI_MAX_PARAM_LEN);
221 cmd.param.id = param->id;
222 cmd.param.len = param->len;
223 memcpy(cmd.param.val, param->val, param->len);
225 nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd);
228 struct nci_rf_discover_param {
233 static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
235 struct nci_rf_discover_param *param =
236 (struct nci_rf_discover_param *)opt;
237 struct nci_rf_disc_cmd cmd;
239 cmd.num_disc_configs = 0;
241 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
242 (param->im_protocols & NFC_PROTO_JEWEL_MASK ||
243 param->im_protocols & NFC_PROTO_MIFARE_MASK ||
244 param->im_protocols & NFC_PROTO_ISO14443_MASK ||
245 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
246 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
247 NCI_NFC_A_PASSIVE_POLL_MODE;
248 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
249 cmd.num_disc_configs++;
252 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
253 (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) {
254 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
255 NCI_NFC_B_PASSIVE_POLL_MODE;
256 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
257 cmd.num_disc_configs++;
260 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
261 (param->im_protocols & NFC_PROTO_FELICA_MASK ||
262 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
263 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
264 NCI_NFC_F_PASSIVE_POLL_MODE;
265 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
266 cmd.num_disc_configs++;
269 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
270 (param->im_protocols & NFC_PROTO_ISO15693_MASK)) {
271 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
272 NCI_NFC_V_PASSIVE_POLL_MODE;
273 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
274 cmd.num_disc_configs++;
277 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) &&
278 (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) {
279 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
280 NCI_NFC_A_PASSIVE_LISTEN_MODE;
281 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
282 cmd.num_disc_configs++;
283 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
284 NCI_NFC_F_PASSIVE_LISTEN_MODE;
285 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
286 cmd.num_disc_configs++;
289 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
290 (1 + (cmd.num_disc_configs * sizeof(struct disc_config))),
294 struct nci_rf_discover_select_param {
295 __u8 rf_discovery_id;
299 static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt)
301 struct nci_rf_discover_select_param *param =
302 (struct nci_rf_discover_select_param *)opt;
303 struct nci_rf_discover_select_cmd cmd;
305 cmd.rf_discovery_id = param->rf_discovery_id;
306 cmd.rf_protocol = param->rf_protocol;
308 switch (cmd.rf_protocol) {
309 case NCI_RF_PROTOCOL_ISO_DEP:
310 cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP;
313 case NCI_RF_PROTOCOL_NFC_DEP:
314 cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP;
318 cmd.rf_interface = NCI_RF_INTERFACE_FRAME;
322 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD,
323 sizeof(struct nci_rf_discover_select_cmd), &cmd);
326 static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt)
328 struct nci_rf_deactivate_cmd cmd;
332 nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD,
333 sizeof(struct nci_rf_deactivate_cmd), &cmd);
336 struct nci_cmd_param {
342 static void nci_generic_req(struct nci_dev *ndev, unsigned long opt)
344 struct nci_cmd_param *param =
345 (struct nci_cmd_param *)opt;
347 nci_send_cmd(ndev, param->opcode, param->len, param->payload);
350 int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload)
352 struct nci_cmd_param param;
354 param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid);
356 param.payload = payload;
358 return __nci_request(ndev, nci_generic_req, (unsigned long)¶m,
359 msecs_to_jiffies(NCI_CMD_TIMEOUT));
361 EXPORT_SYMBOL(nci_prop_cmd);
363 int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload)
365 struct nci_cmd_param param;
367 param.opcode = opcode;
369 param.payload = payload;
371 return __nci_request(ndev, nci_generic_req, (unsigned long)¶m,
372 msecs_to_jiffies(NCI_CMD_TIMEOUT));
374 EXPORT_SYMBOL(nci_core_cmd);
376 int nci_core_reset(struct nci_dev *ndev)
378 return __nci_request(ndev, nci_reset_req, 0,
379 msecs_to_jiffies(NCI_RESET_TIMEOUT));
381 EXPORT_SYMBOL(nci_core_reset);
383 int nci_core_init(struct nci_dev *ndev)
385 return __nci_request(ndev, nci_init_req, 0,
386 msecs_to_jiffies(NCI_INIT_TIMEOUT));
388 EXPORT_SYMBOL(nci_core_init);
390 struct nci_loopback_data {
392 struct sk_buff *data;
395 static void nci_send_data_req(struct nci_dev *ndev, unsigned long opt)
397 struct nci_loopback_data *data = (struct nci_loopback_data *)opt;
399 nci_send_data(ndev, data->conn_id, data->data);
402 static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err)
404 struct nci_dev *ndev = (struct nci_dev *)context;
405 struct nci_conn_info *conn_info;
407 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
409 nci_req_complete(ndev, NCI_STATUS_REJECTED);
413 conn_info->rx_skb = skb;
415 nci_req_complete(ndev, NCI_STATUS_OK);
418 int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
419 struct sk_buff **resp)
422 struct nci_loopback_data loopback_data;
423 struct nci_conn_info *conn_info;
425 int conn_id = nci_get_conn_info_by_dest_type_params(ndev,
426 NCI_DESTINATION_NFCC_LOOPBACK, NULL);
429 r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK,
431 if (r != NCI_STATUS_OK)
434 conn_id = nci_get_conn_info_by_dest_type_params(ndev,
435 NCI_DESTINATION_NFCC_LOOPBACK,
439 conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
443 /* store cb and context to be used on receiving data */
444 conn_info->data_exchange_cb = nci_nfcc_loopback_cb;
445 conn_info->data_exchange_cb_context = ndev;
447 skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL);
451 skb_reserve(skb, NCI_DATA_HDR_SIZE);
452 skb_put_data(skb, data, data_len);
454 loopback_data.conn_id = conn_id;
455 loopback_data.data = skb;
457 ndev->cur_conn_id = conn_id;
458 r = nci_request(ndev, nci_send_data_req, (unsigned long)&loopback_data,
459 msecs_to_jiffies(NCI_DATA_TIMEOUT));
460 if (r == NCI_STATUS_OK && resp)
461 *resp = conn_info->rx_skb;
465 EXPORT_SYMBOL(nci_nfcc_loopback);
467 static int nci_open_device(struct nci_dev *ndev)
471 mutex_lock(&ndev->req_lock);
473 if (test_bit(NCI_UP, &ndev->flags)) {
478 if (ndev->ops->open(ndev)) {
483 atomic_set(&ndev->cmd_cnt, 1);
485 set_bit(NCI_INIT, &ndev->flags);
488 rc = ndev->ops->init(ndev);
491 rc = __nci_request(ndev, nci_reset_req, 0,
492 msecs_to_jiffies(NCI_RESET_TIMEOUT));
495 if (!rc && ndev->ops->setup) {
496 rc = ndev->ops->setup(ndev);
500 rc = __nci_request(ndev, nci_init_req, 0,
501 msecs_to_jiffies(NCI_INIT_TIMEOUT));
504 if (!rc && ndev->ops->post_setup)
505 rc = ndev->ops->post_setup(ndev);
508 rc = __nci_request(ndev, nci_init_complete_req, 0,
509 msecs_to_jiffies(NCI_INIT_TIMEOUT));
512 clear_bit(NCI_INIT, &ndev->flags);
515 set_bit(NCI_UP, &ndev->flags);
516 nci_clear_target_list(ndev);
517 atomic_set(&ndev->state, NCI_IDLE);
519 /* Init failed, cleanup */
520 skb_queue_purge(&ndev->cmd_q);
521 skb_queue_purge(&ndev->rx_q);
522 skb_queue_purge(&ndev->tx_q);
524 ndev->ops->close(ndev);
529 mutex_unlock(&ndev->req_lock);
533 static int nci_close_device(struct nci_dev *ndev)
535 nci_req_cancel(ndev, ENODEV);
536 mutex_lock(&ndev->req_lock);
538 if (!test_and_clear_bit(NCI_UP, &ndev->flags)) {
539 del_timer_sync(&ndev->cmd_timer);
540 del_timer_sync(&ndev->data_timer);
541 mutex_unlock(&ndev->req_lock);
545 /* Drop RX and TX queues */
546 skb_queue_purge(&ndev->rx_q);
547 skb_queue_purge(&ndev->tx_q);
549 /* Flush RX and TX wq */
550 flush_workqueue(ndev->rx_wq);
551 flush_workqueue(ndev->tx_wq);
554 skb_queue_purge(&ndev->cmd_q);
555 atomic_set(&ndev->cmd_cnt, 1);
557 set_bit(NCI_INIT, &ndev->flags);
558 __nci_request(ndev, nci_reset_req, 0,
559 msecs_to_jiffies(NCI_RESET_TIMEOUT));
561 /* After this point our queues are empty
562 * and no works are scheduled.
564 ndev->ops->close(ndev);
566 clear_bit(NCI_INIT, &ndev->flags);
568 del_timer_sync(&ndev->cmd_timer);
571 flush_workqueue(ndev->cmd_wq);
576 mutex_unlock(&ndev->req_lock);
581 /* NCI command timer function */
582 static void nci_cmd_timer(struct timer_list *t)
584 struct nci_dev *ndev = from_timer(ndev, t, cmd_timer);
586 atomic_set(&ndev->cmd_cnt, 1);
587 queue_work(ndev->cmd_wq, &ndev->cmd_work);
590 /* NCI data exchange timer function */
591 static void nci_data_timer(struct timer_list *t)
593 struct nci_dev *ndev = from_timer(ndev, t, data_timer);
595 set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
596 queue_work(ndev->rx_wq, &ndev->rx_work);
599 static int nci_dev_up(struct nfc_dev *nfc_dev)
601 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
603 return nci_open_device(ndev);
606 static int nci_dev_down(struct nfc_dev *nfc_dev)
608 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
610 return nci_close_device(ndev);
613 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val)
615 struct nci_set_config_param param;
624 return __nci_request(ndev, nci_set_config_req, (unsigned long)¶m,
625 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
627 EXPORT_SYMBOL(nci_set_config);
629 static void nci_nfcee_discover_req(struct nci_dev *ndev, unsigned long opt)
631 struct nci_nfcee_discover_cmd cmd;
634 cmd.discovery_action = action;
636 nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd);
639 int nci_nfcee_discover(struct nci_dev *ndev, u8 action)
641 return __nci_request(ndev, nci_nfcee_discover_req, action,
642 msecs_to_jiffies(NCI_CMD_TIMEOUT));
644 EXPORT_SYMBOL(nci_nfcee_discover);
646 static void nci_nfcee_mode_set_req(struct nci_dev *ndev, unsigned long opt)
648 struct nci_nfcee_mode_set_cmd *cmd =
649 (struct nci_nfcee_mode_set_cmd *)opt;
651 nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD,
652 sizeof(struct nci_nfcee_mode_set_cmd), cmd);
655 int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode)
657 struct nci_nfcee_mode_set_cmd cmd;
659 cmd.nfcee_id = nfcee_id;
660 cmd.nfcee_mode = nfcee_mode;
662 return __nci_request(ndev, nci_nfcee_mode_set_req,
664 msecs_to_jiffies(NCI_CMD_TIMEOUT));
666 EXPORT_SYMBOL(nci_nfcee_mode_set);
668 static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt)
670 struct core_conn_create_data *data =
671 (struct core_conn_create_data *)opt;
673 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd);
676 int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
677 u8 number_destination_params,
679 struct core_conn_create_dest_spec_params *params)
682 struct nci_core_conn_create_cmd *cmd;
683 struct core_conn_create_data data;
685 data.length = params_len + sizeof(struct nci_core_conn_create_cmd);
686 cmd = kzalloc(data.length, GFP_KERNEL);
690 cmd->destination_type = destination_type;
691 cmd->number_destination_params = number_destination_params;
696 memcpy(cmd->params, params, params_len);
697 if (params->length > 0)
698 memcpy(&ndev->cur_params,
699 ¶ms->value[DEST_SPEC_PARAMS_ID_INDEX],
700 sizeof(struct dest_spec_params));
702 ndev->cur_params.id = 0;
704 ndev->cur_params.id = 0;
706 ndev->cur_dest_type = destination_type;
708 r = __nci_request(ndev, nci_core_conn_create_req, (unsigned long)&data,
709 msecs_to_jiffies(NCI_CMD_TIMEOUT));
713 EXPORT_SYMBOL(nci_core_conn_create);
715 static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt)
719 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id);
722 int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id)
724 ndev->cur_conn_id = conn_id;
725 return __nci_request(ndev, nci_core_conn_close_req, conn_id,
726 msecs_to_jiffies(NCI_CMD_TIMEOUT));
728 EXPORT_SYMBOL(nci_core_conn_close);
730 static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
732 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
733 struct nci_set_config_param param;
736 param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len);
737 if ((param.val == NULL) || (param.len == 0))
740 if (param.len > NFC_MAX_GT_LEN)
743 param.id = NCI_PN_ATR_REQ_GEN_BYTES;
745 rc = nci_request(ndev, nci_set_config_req, (unsigned long)¶m,
746 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
750 param.id = NCI_LN_ATR_RES_GEN_BYTES;
752 return nci_request(ndev, nci_set_config_req, (unsigned long)¶m,
753 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
756 static int nci_set_listen_parameters(struct nfc_dev *nfc_dev)
758 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
762 val = NCI_LA_SEL_INFO_NFC_DEP_MASK;
764 rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val);
768 val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK;
770 rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val);
774 val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424;
776 return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val);
779 static int nci_start_poll(struct nfc_dev *nfc_dev,
780 __u32 im_protocols, __u32 tm_protocols)
782 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
783 struct nci_rf_discover_param param;
786 if ((atomic_read(&ndev->state) == NCI_DISCOVERY) ||
787 (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) {
788 pr_err("unable to start poll, since poll is already active\n");
792 if (ndev->target_active_prot) {
793 pr_err("there is an active target\n");
797 if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) ||
798 (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) {
799 pr_debug("target active or w4 select, implicitly deactivate\n");
801 rc = nci_request(ndev, nci_rf_deactivate_req,
802 NCI_DEACTIVATE_TYPE_IDLE_MODE,
803 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
808 if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
809 rc = nci_set_local_general_bytes(nfc_dev);
811 pr_err("failed to set local general bytes\n");
816 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
817 rc = nci_set_listen_parameters(nfc_dev);
819 pr_err("failed to set listen parameters\n");
822 param.im_protocols = im_protocols;
823 param.tm_protocols = tm_protocols;
824 rc = nci_request(ndev, nci_rf_discover_req, (unsigned long)¶m,
825 msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
828 ndev->poll_prots = im_protocols;
833 static void nci_stop_poll(struct nfc_dev *nfc_dev)
835 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
837 if ((atomic_read(&ndev->state) != NCI_DISCOVERY) &&
838 (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) {
839 pr_err("unable to stop poll, since poll is not active\n");
843 nci_request(ndev, nci_rf_deactivate_req, NCI_DEACTIVATE_TYPE_IDLE_MODE,
844 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
847 static int nci_activate_target(struct nfc_dev *nfc_dev,
848 struct nfc_target *target, __u32 protocol)
850 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
851 struct nci_rf_discover_select_param param;
852 struct nfc_target *nci_target = NULL;
856 pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol);
858 if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) &&
859 (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
860 pr_err("there is no available target to activate\n");
864 if (ndev->target_active_prot) {
865 pr_err("there is already an active target\n");
869 for (i = 0; i < ndev->n_targets; i++) {
870 if (ndev->targets[i].idx == target->idx) {
871 nci_target = &ndev->targets[i];
877 pr_err("unable to find the selected target\n");
881 if (!(nci_target->supported_protocols & (1 << protocol))) {
882 pr_err("target does not support the requested protocol 0x%x\n",
887 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
888 param.rf_discovery_id = nci_target->logical_idx;
890 if (protocol == NFC_PROTO_JEWEL)
891 param.rf_protocol = NCI_RF_PROTOCOL_T1T;
892 else if (protocol == NFC_PROTO_MIFARE)
893 param.rf_protocol = NCI_RF_PROTOCOL_T2T;
894 else if (protocol == NFC_PROTO_FELICA)
895 param.rf_protocol = NCI_RF_PROTOCOL_T3T;
896 else if (protocol == NFC_PROTO_ISO14443 ||
897 protocol == NFC_PROTO_ISO14443_B)
898 param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
900 param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
902 rc = nci_request(ndev, nci_rf_discover_select_req,
903 (unsigned long)¶m,
904 msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT));
908 ndev->target_active_prot = protocol;
913 static void nci_deactivate_target(struct nfc_dev *nfc_dev,
914 struct nfc_target *target,
917 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
918 u8 nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE;
922 if (!ndev->target_active_prot) {
923 pr_err("unable to deactivate target, no active target\n");
927 ndev->target_active_prot = 0;
930 case NFC_TARGET_MODE_SLEEP:
931 nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE;
935 if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
936 nci_request(ndev, nci_rf_deactivate_req, nci_mode,
937 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
941 static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
942 __u8 comm_mode, __u8 *gb, size_t gb_len)
944 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
947 pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
949 rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
953 rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
954 ndev->remote_gb_len);
956 rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
962 static int nci_dep_link_down(struct nfc_dev *nfc_dev)
964 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
969 if (nfc_dev->rf_mode == NFC_RF_INITIATOR) {
970 nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE);
972 if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE ||
973 atomic_read(&ndev->state) == NCI_DISCOVERY) {
974 nci_request(ndev, nci_rf_deactivate_req, 0,
975 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
978 rc = nfc_tm_deactivated(nfc_dev);
980 pr_err("error when signaling tm deactivation\n");
987 static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
989 data_exchange_cb_t cb, void *cb_context)
991 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
993 struct nci_conn_info *conn_info;
995 conn_info = ndev->rf_conn_info;
999 pr_debug("target_idx %d, len %d\n", target->idx, skb->len);
1001 if (!ndev->target_active_prot) {
1002 pr_err("unable to exchange data, no active target\n");
1006 if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1009 /* store cb and context to be used on receiving data */
1010 conn_info->data_exchange_cb = cb;
1011 conn_info->data_exchange_cb_context = cb_context;
1013 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1015 clear_bit(NCI_DATA_EXCHANGE, &ndev->flags);
1020 static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
1022 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1025 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1027 pr_err("unable to send data\n");
1032 static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1034 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1036 if (ndev->ops->enable_se)
1037 return ndev->ops->enable_se(ndev, se_idx);
1042 static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1044 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1046 if (ndev->ops->disable_se)
1047 return ndev->ops->disable_se(ndev, se_idx);
1052 static int nci_discover_se(struct nfc_dev *nfc_dev)
1055 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1057 if (ndev->ops->discover_se) {
1058 r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE);
1059 if (r != NCI_STATUS_OK)
1062 return ndev->ops->discover_se(ndev);
1068 static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx,
1069 u8 *apdu, size_t apdu_length,
1070 se_io_cb_t cb, void *cb_context)
1072 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1074 if (ndev->ops->se_io)
1075 return ndev->ops->se_io(ndev, se_idx, apdu,
1076 apdu_length, cb, cb_context);
1081 static int nci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name)
1083 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1085 if (!ndev->ops->fw_download)
1088 return ndev->ops->fw_download(ndev, firmware_name);
1091 static struct nfc_ops nci_nfc_ops = {
1092 .dev_up = nci_dev_up,
1093 .dev_down = nci_dev_down,
1094 .start_poll = nci_start_poll,
1095 .stop_poll = nci_stop_poll,
1096 .dep_link_up = nci_dep_link_up,
1097 .dep_link_down = nci_dep_link_down,
1098 .activate_target = nci_activate_target,
1099 .deactivate_target = nci_deactivate_target,
1100 .im_transceive = nci_transceive,
1101 .tm_send = nci_tm_send,
1102 .enable_se = nci_enable_se,
1103 .disable_se = nci_disable_se,
1104 .discover_se = nci_discover_se,
1106 .fw_download = nci_fw_download,
1109 /* ---- Interface to NCI drivers ---- */
1111 * nci_allocate_device - allocate a new nci device
1113 * @ops: device operations
1114 * @supported_protocols: NFC protocols supported by the device
1116 struct nci_dev *nci_allocate_device(struct nci_ops *ops,
1117 __u32 supported_protocols,
1118 int tx_headroom, int tx_tailroom)
1120 struct nci_dev *ndev;
1122 pr_debug("supported_protocols 0x%x\n", supported_protocols);
1124 if (!ops->open || !ops->close || !ops->send)
1127 if (!supported_protocols)
1130 ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL);
1136 if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) {
1137 pr_err("Too many proprietary commands: %zd\n",
1139 ops->prop_ops = NULL;
1140 ops->n_prop_ops = 0;
1143 ndev->tx_headroom = tx_headroom;
1144 ndev->tx_tailroom = tx_tailroom;
1145 init_completion(&ndev->req_completion);
1147 ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
1148 supported_protocols,
1149 tx_headroom + NCI_DATA_HDR_SIZE,
1154 ndev->hci_dev = nci_hci_allocate(ndev);
1158 nfc_set_drvdata(ndev->nfc_dev, ndev);
1163 nfc_free_device(ndev->nfc_dev);
1168 EXPORT_SYMBOL(nci_allocate_device);
1171 * nci_free_device - deallocate nci device
1173 * @ndev: The nci device to deallocate
1175 void nci_free_device(struct nci_dev *ndev)
1177 nfc_free_device(ndev->nfc_dev);
1180 EXPORT_SYMBOL(nci_free_device);
1183 * nci_register_device - register a nci device in the nfc subsystem
1185 * @dev: The nci device to register
1187 int nci_register_device(struct nci_dev *ndev)
1190 struct device *dev = &ndev->nfc_dev->dev;
1195 INIT_WORK(&ndev->cmd_work, nci_cmd_work);
1196 snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev));
1197 ndev->cmd_wq = create_singlethread_workqueue(name);
1198 if (!ndev->cmd_wq) {
1203 INIT_WORK(&ndev->rx_work, nci_rx_work);
1204 snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev));
1205 ndev->rx_wq = create_singlethread_workqueue(name);
1208 goto destroy_cmd_wq_exit;
1211 INIT_WORK(&ndev->tx_work, nci_tx_work);
1212 snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev));
1213 ndev->tx_wq = create_singlethread_workqueue(name);
1216 goto destroy_rx_wq_exit;
1219 skb_queue_head_init(&ndev->cmd_q);
1220 skb_queue_head_init(&ndev->rx_q);
1221 skb_queue_head_init(&ndev->tx_q);
1223 timer_setup(&ndev->cmd_timer, nci_cmd_timer, 0);
1224 timer_setup(&ndev->data_timer, nci_data_timer, 0);
1226 mutex_init(&ndev->req_lock);
1227 INIT_LIST_HEAD(&ndev->conn_info_list);
1229 rc = nfc_register_device(ndev->nfc_dev);
1231 goto destroy_rx_wq_exit;
1236 destroy_workqueue(ndev->rx_wq);
1238 destroy_cmd_wq_exit:
1239 destroy_workqueue(ndev->cmd_wq);
1244 EXPORT_SYMBOL(nci_register_device);
1247 * nci_unregister_device - unregister a nci device in the nfc subsystem
1249 * @dev: The nci device to unregister
1251 void nci_unregister_device(struct nci_dev *ndev)
1253 struct nci_conn_info *conn_info, *n;
1255 nci_close_device(ndev);
1257 destroy_workqueue(ndev->cmd_wq);
1258 destroy_workqueue(ndev->rx_wq);
1259 destroy_workqueue(ndev->tx_wq);
1261 list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) {
1262 list_del(&conn_info->list);
1263 /* conn_info is allocated with devm_kzalloc */
1266 nfc_unregister_device(ndev->nfc_dev);
1268 EXPORT_SYMBOL(nci_unregister_device);
1271 * nci_recv_frame - receive frame from NCI drivers
1273 * @ndev: The nci device
1274 * @skb: The sk_buff to receive
1276 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
1278 pr_debug("len %d\n", skb->len);
1280 if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
1281 !test_bit(NCI_INIT, &ndev->flags))) {
1286 /* Queue frame for rx worker thread */
1287 skb_queue_tail(&ndev->rx_q, skb);
1288 queue_work(ndev->rx_wq, &ndev->rx_work);
1292 EXPORT_SYMBOL(nci_recv_frame);
1294 int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb)
1296 pr_debug("len %d\n", skb->len);
1303 /* Get rid of skb owner, prior to sending to the driver. */
1306 /* Send copy to sniffer */
1307 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1308 RAW_PAYLOAD_NCI, NFC_DIRECTION_TX);
1310 return ndev->ops->send(ndev, skb);
1312 EXPORT_SYMBOL(nci_send_frame);
1314 /* Send NCI command */
1315 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload)
1317 struct nci_ctrl_hdr *hdr;
1318 struct sk_buff *skb;
1320 pr_debug("opcode 0x%x, plen %d\n", opcode, plen);
1322 skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL);
1324 pr_err("no memory for command\n");
1328 hdr = skb_put(skb, NCI_CTRL_HDR_SIZE);
1329 hdr->gid = nci_opcode_gid(opcode);
1330 hdr->oid = nci_opcode_oid(opcode);
1333 nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT);
1334 nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST);
1337 skb_put_data(skb, payload, plen);
1339 skb_queue_tail(&ndev->cmd_q, skb);
1340 queue_work(ndev->cmd_wq, &ndev->cmd_work);
1344 EXPORT_SYMBOL(nci_send_cmd);
1346 /* Proprietary commands API */
1347 static struct nci_driver_ops *ops_cmd_lookup(struct nci_driver_ops *ops,
1352 struct nci_driver_ops *op;
1357 for (i = 0; i < n_ops; i++) {
1359 if (op->opcode == opcode)
1366 static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode,
1367 struct sk_buff *skb, struct nci_driver_ops *ops,
1370 struct nci_driver_ops *op;
1372 op = ops_cmd_lookup(ops, n_ops, rsp_opcode);
1373 if (!op || !op->rsp)
1376 return op->rsp(ndev, skb);
1379 static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode,
1380 struct sk_buff *skb, struct nci_driver_ops *ops,
1383 struct nci_driver_ops *op;
1385 op = ops_cmd_lookup(ops, n_ops, ntf_opcode);
1386 if (!op || !op->ntf)
1389 return op->ntf(ndev, skb);
1392 int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1393 struct sk_buff *skb)
1395 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1396 ndev->ops->n_prop_ops);
1399 int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1400 struct sk_buff *skb)
1402 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1403 ndev->ops->n_prop_ops);
1406 int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1407 struct sk_buff *skb)
1409 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops,
1410 ndev->ops->n_core_ops);
1413 int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1414 struct sk_buff *skb)
1416 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops,
1417 ndev->ops->n_core_ops);
1420 /* ---- NCI TX Data worker thread ---- */
1422 static void nci_tx_work(struct work_struct *work)
1424 struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work);
1425 struct nci_conn_info *conn_info;
1426 struct sk_buff *skb;
1428 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
1432 pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt));
1434 /* Send queued tx data */
1435 while (atomic_read(&conn_info->credits_cnt)) {
1436 skb = skb_dequeue(&ndev->tx_q);
1440 /* Check if data flow control is used */
1441 if (atomic_read(&conn_info->credits_cnt) !=
1442 NCI_DATA_FLOW_CONTROL_NOT_USED)
1443 atomic_dec(&conn_info->credits_cnt);
1445 pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n",
1447 nci_conn_id(skb->data),
1448 nci_plen(skb->data));
1450 nci_send_frame(ndev, skb);
1452 mod_timer(&ndev->data_timer,
1453 jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT));
1457 /* ----- NCI RX worker thread (data & control) ----- */
1459 static void nci_rx_work(struct work_struct *work)
1461 struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work);
1462 struct sk_buff *skb;
1464 while ((skb = skb_dequeue(&ndev->rx_q))) {
1466 /* Send copy to sniffer */
1467 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1468 RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);
1471 switch (nci_mt(skb->data)) {
1472 case NCI_MT_RSP_PKT:
1473 nci_rsp_packet(ndev, skb);
1476 case NCI_MT_NTF_PKT:
1477 nci_ntf_packet(ndev, skb);
1480 case NCI_MT_DATA_PKT:
1481 nci_rx_data_packet(ndev, skb);
1485 pr_err("unknown MT 0x%x\n", nci_mt(skb->data));
1491 /* check if a data exchange timout has occurred */
1492 if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) {
1493 /* complete the data exchange transaction, if exists */
1494 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1495 nci_data_exchange_complete(ndev, NULL,
1499 clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
1503 /* ----- NCI TX CMD worker thread ----- */
1505 static void nci_cmd_work(struct work_struct *work)
1507 struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work);
1508 struct sk_buff *skb;
1510 pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt));
1512 /* Send queued command */
1513 if (atomic_read(&ndev->cmd_cnt)) {
1514 skb = skb_dequeue(&ndev->cmd_q);
1518 atomic_dec(&ndev->cmd_cnt);
1520 pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
1522 nci_opcode_gid(nci_opcode(skb->data)),
1523 nci_opcode_oid(nci_opcode(skb->data)),
1524 nci_plen(skb->data));
1526 nci_send_frame(ndev, skb);
1528 mod_timer(&ndev->cmd_timer,
1529 jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT));
1533 MODULE_LICENSE("GPL");