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 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, const void *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, const void *opt)
171 plen = sizeof(struct nci_core_init_v2_cmd);
173 nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, plen, opt);
176 static void nci_init_complete_req(struct nci_dev *ndev, const void *opt)
178 struct nci_rf_disc_map_cmd cmd;
179 struct disc_map_config *cfg = cmd.mapping_configs;
180 __u8 *num = &cmd.num_mapping_configs;
183 /* set rf mapping configurations */
186 /* by default mapping is set to NCI_RF_INTERFACE_FRAME */
187 for (i = 0; i < ndev->num_supported_rf_interfaces; i++) {
188 if (ndev->supported_rf_interfaces[i] ==
189 NCI_RF_INTERFACE_ISO_DEP) {
190 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
191 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
192 NCI_DISC_MAP_MODE_LISTEN;
193 cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP;
195 } else if (ndev->supported_rf_interfaces[i] ==
196 NCI_RF_INTERFACE_NFC_DEP) {
197 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
198 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
199 NCI_DISC_MAP_MODE_LISTEN;
200 cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP;
204 if (*num == NCI_MAX_NUM_MAPPING_CONFIGS)
208 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD,
209 (1 + ((*num) * sizeof(struct disc_map_config))), &cmd);
212 struct nci_set_config_param {
218 static void nci_set_config_req(struct nci_dev *ndev, const void *opt)
220 const struct nci_set_config_param *param = opt;
221 struct nci_core_set_config_cmd cmd;
223 BUG_ON(param->len > NCI_MAX_PARAM_LEN);
226 cmd.param.id = param->id;
227 cmd.param.len = param->len;
228 memcpy(cmd.param.val, param->val, param->len);
230 nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd);
233 struct nci_rf_discover_param {
238 static void nci_rf_discover_req(struct nci_dev *ndev, const void *opt)
240 const struct nci_rf_discover_param *param = opt;
241 struct nci_rf_disc_cmd cmd;
243 cmd.num_disc_configs = 0;
245 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
246 (param->im_protocols & NFC_PROTO_JEWEL_MASK ||
247 param->im_protocols & NFC_PROTO_MIFARE_MASK ||
248 param->im_protocols & NFC_PROTO_ISO14443_MASK ||
249 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
250 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
251 NCI_NFC_A_PASSIVE_POLL_MODE;
252 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
253 cmd.num_disc_configs++;
256 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
257 (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) {
258 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
259 NCI_NFC_B_PASSIVE_POLL_MODE;
260 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
261 cmd.num_disc_configs++;
264 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
265 (param->im_protocols & NFC_PROTO_FELICA_MASK ||
266 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
267 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
268 NCI_NFC_F_PASSIVE_POLL_MODE;
269 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
270 cmd.num_disc_configs++;
273 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
274 (param->im_protocols & NFC_PROTO_ISO15693_MASK)) {
275 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
276 NCI_NFC_V_PASSIVE_POLL_MODE;
277 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
278 cmd.num_disc_configs++;
281 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) &&
282 (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) {
283 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
284 NCI_NFC_A_PASSIVE_LISTEN_MODE;
285 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
286 cmd.num_disc_configs++;
287 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
288 NCI_NFC_F_PASSIVE_LISTEN_MODE;
289 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
290 cmd.num_disc_configs++;
293 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
294 (1 + (cmd.num_disc_configs * sizeof(struct disc_config))),
298 struct nci_rf_discover_select_param {
299 __u8 rf_discovery_id;
303 static void nci_rf_discover_select_req(struct nci_dev *ndev, const void *opt)
305 const struct nci_rf_discover_select_param *param = opt;
306 struct nci_rf_discover_select_cmd cmd;
308 cmd.rf_discovery_id = param->rf_discovery_id;
309 cmd.rf_protocol = param->rf_protocol;
311 switch (cmd.rf_protocol) {
312 case NCI_RF_PROTOCOL_ISO_DEP:
313 cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP;
316 case NCI_RF_PROTOCOL_NFC_DEP:
317 cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP;
321 cmd.rf_interface = NCI_RF_INTERFACE_FRAME;
325 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD,
326 sizeof(struct nci_rf_discover_select_cmd), &cmd);
329 static void nci_rf_deactivate_req(struct nci_dev *ndev, const void *opt)
331 struct nci_rf_deactivate_cmd cmd;
333 cmd.type = (unsigned long)opt;
335 nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD,
336 sizeof(struct nci_rf_deactivate_cmd), &cmd);
339 struct nci_cmd_param {
345 static void nci_generic_req(struct nci_dev *ndev, const void *opt)
347 const struct nci_cmd_param *param = opt;
349 nci_send_cmd(ndev, param->opcode, param->len, param->payload);
352 int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, const __u8 *payload)
354 struct nci_cmd_param param;
356 param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid);
358 param.payload = payload;
360 return __nci_request(ndev, nci_generic_req, ¶m,
361 msecs_to_jiffies(NCI_CMD_TIMEOUT));
363 EXPORT_SYMBOL(nci_prop_cmd);
365 int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len,
368 struct nci_cmd_param param;
370 param.opcode = opcode;
372 param.payload = payload;
374 return __nci_request(ndev, nci_generic_req, ¶m,
375 msecs_to_jiffies(NCI_CMD_TIMEOUT));
377 EXPORT_SYMBOL(nci_core_cmd);
379 int nci_core_reset(struct nci_dev *ndev)
381 return __nci_request(ndev, nci_reset_req, (void *)0,
382 msecs_to_jiffies(NCI_RESET_TIMEOUT));
384 EXPORT_SYMBOL(nci_core_reset);
386 int nci_core_init(struct nci_dev *ndev)
388 return __nci_request(ndev, nci_init_req, (void *)0,
389 msecs_to_jiffies(NCI_INIT_TIMEOUT));
391 EXPORT_SYMBOL(nci_core_init);
393 struct nci_loopback_data {
395 struct sk_buff *data;
398 static void nci_send_data_req(struct nci_dev *ndev, const void *opt)
400 const struct nci_loopback_data *data = opt;
402 nci_send_data(ndev, data->conn_id, data->data);
405 static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err)
407 struct nci_dev *ndev = (struct nci_dev *)context;
408 struct nci_conn_info *conn_info;
410 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
412 nci_req_complete(ndev, NCI_STATUS_REJECTED);
416 conn_info->rx_skb = skb;
418 nci_req_complete(ndev, NCI_STATUS_OK);
421 int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len,
422 struct sk_buff **resp)
425 struct nci_loopback_data loopback_data;
426 struct nci_conn_info *conn_info;
428 int conn_id = nci_get_conn_info_by_dest_type_params(ndev,
429 NCI_DESTINATION_NFCC_LOOPBACK, NULL);
432 r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK,
434 if (r != NCI_STATUS_OK)
437 conn_id = nci_get_conn_info_by_dest_type_params(ndev,
438 NCI_DESTINATION_NFCC_LOOPBACK,
442 conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
446 /* store cb and context to be used on receiving data */
447 conn_info->data_exchange_cb = nci_nfcc_loopback_cb;
448 conn_info->data_exchange_cb_context = ndev;
450 skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL);
454 skb_reserve(skb, NCI_DATA_HDR_SIZE);
455 skb_put_data(skb, data, data_len);
457 loopback_data.conn_id = conn_id;
458 loopback_data.data = skb;
460 ndev->cur_conn_id = conn_id;
461 r = nci_request(ndev, nci_send_data_req, &loopback_data,
462 msecs_to_jiffies(NCI_DATA_TIMEOUT));
463 if (r == NCI_STATUS_OK && resp)
464 *resp = conn_info->rx_skb;
468 EXPORT_SYMBOL(nci_nfcc_loopback);
470 static int nci_open_device(struct nci_dev *ndev)
474 mutex_lock(&ndev->req_lock);
476 if (test_bit(NCI_UP, &ndev->flags)) {
481 if (ndev->ops->open(ndev)) {
486 atomic_set(&ndev->cmd_cnt, 1);
488 set_bit(NCI_INIT, &ndev->flags);
491 rc = ndev->ops->init(ndev);
494 rc = __nci_request(ndev, nci_reset_req, (void *)0,
495 msecs_to_jiffies(NCI_RESET_TIMEOUT));
498 if (!rc && ndev->ops->setup) {
499 rc = ndev->ops->setup(ndev);
503 struct nci_core_init_v2_cmd nci_init_v2_cmd = {
504 .feature1 = NCI_FEATURE_DISABLE,
505 .feature2 = NCI_FEATURE_DISABLE
507 const void *opt = NULL;
509 if (ndev->nci_ver & NCI_VER_2_MASK)
510 opt = &nci_init_v2_cmd;
512 rc = __nci_request(ndev, nci_init_req, opt,
513 msecs_to_jiffies(NCI_INIT_TIMEOUT));
516 if (!rc && ndev->ops->post_setup)
517 rc = ndev->ops->post_setup(ndev);
520 rc = __nci_request(ndev, nci_init_complete_req, (void *)0,
521 msecs_to_jiffies(NCI_INIT_TIMEOUT));
524 clear_bit(NCI_INIT, &ndev->flags);
527 set_bit(NCI_UP, &ndev->flags);
528 nci_clear_target_list(ndev);
529 atomic_set(&ndev->state, NCI_IDLE);
531 /* Init failed, cleanup */
532 skb_queue_purge(&ndev->cmd_q);
533 skb_queue_purge(&ndev->rx_q);
534 skb_queue_purge(&ndev->tx_q);
536 ndev->ops->close(ndev);
541 mutex_unlock(&ndev->req_lock);
545 static int nci_close_device(struct nci_dev *ndev)
547 nci_req_cancel(ndev, ENODEV);
548 mutex_lock(&ndev->req_lock);
550 if (!test_and_clear_bit(NCI_UP, &ndev->flags)) {
551 del_timer_sync(&ndev->cmd_timer);
552 del_timer_sync(&ndev->data_timer);
553 mutex_unlock(&ndev->req_lock);
557 /* Drop RX and TX queues */
558 skb_queue_purge(&ndev->rx_q);
559 skb_queue_purge(&ndev->tx_q);
561 /* Flush RX and TX wq */
562 flush_workqueue(ndev->rx_wq);
563 flush_workqueue(ndev->tx_wq);
566 skb_queue_purge(&ndev->cmd_q);
567 atomic_set(&ndev->cmd_cnt, 1);
569 set_bit(NCI_INIT, &ndev->flags);
570 __nci_request(ndev, nci_reset_req, (void *)0,
571 msecs_to_jiffies(NCI_RESET_TIMEOUT));
573 /* After this point our queues are empty
574 * and no works are scheduled.
576 ndev->ops->close(ndev);
578 clear_bit(NCI_INIT, &ndev->flags);
581 flush_workqueue(ndev->cmd_wq);
583 del_timer_sync(&ndev->cmd_timer);
588 mutex_unlock(&ndev->req_lock);
593 /* NCI command timer function */
594 static void nci_cmd_timer(struct timer_list *t)
596 struct nci_dev *ndev = from_timer(ndev, t, cmd_timer);
598 atomic_set(&ndev->cmd_cnt, 1);
599 queue_work(ndev->cmd_wq, &ndev->cmd_work);
602 /* NCI data exchange timer function */
603 static void nci_data_timer(struct timer_list *t)
605 struct nci_dev *ndev = from_timer(ndev, t, data_timer);
607 set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
608 queue_work(ndev->rx_wq, &ndev->rx_work);
611 static int nci_dev_up(struct nfc_dev *nfc_dev)
613 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
615 return nci_open_device(ndev);
618 static int nci_dev_down(struct nfc_dev *nfc_dev)
620 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
622 return nci_close_device(ndev);
625 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val)
627 struct nci_set_config_param param;
636 return __nci_request(ndev, nci_set_config_req, ¶m,
637 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
639 EXPORT_SYMBOL(nci_set_config);
641 static void nci_nfcee_discover_req(struct nci_dev *ndev, const void *opt)
643 struct nci_nfcee_discover_cmd cmd;
644 __u8 action = (unsigned long)opt;
646 cmd.discovery_action = action;
648 nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd);
651 int nci_nfcee_discover(struct nci_dev *ndev, u8 action)
653 unsigned long opt = action;
655 return __nci_request(ndev, nci_nfcee_discover_req, (void *)opt,
656 msecs_to_jiffies(NCI_CMD_TIMEOUT));
658 EXPORT_SYMBOL(nci_nfcee_discover);
660 static void nci_nfcee_mode_set_req(struct nci_dev *ndev, const void *opt)
662 const struct nci_nfcee_mode_set_cmd *cmd = opt;
664 nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD,
665 sizeof(struct nci_nfcee_mode_set_cmd), cmd);
668 int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode)
670 struct nci_nfcee_mode_set_cmd cmd;
672 cmd.nfcee_id = nfcee_id;
673 cmd.nfcee_mode = nfcee_mode;
675 return __nci_request(ndev, nci_nfcee_mode_set_req, &cmd,
676 msecs_to_jiffies(NCI_CMD_TIMEOUT));
678 EXPORT_SYMBOL(nci_nfcee_mode_set);
680 static void nci_core_conn_create_req(struct nci_dev *ndev, const void *opt)
682 const struct core_conn_create_data *data = opt;
684 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd);
687 int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
688 u8 number_destination_params,
690 const struct core_conn_create_dest_spec_params *params)
693 struct nci_core_conn_create_cmd *cmd;
694 struct core_conn_create_data data;
696 data.length = params_len + sizeof(struct nci_core_conn_create_cmd);
697 cmd = kzalloc(data.length, GFP_KERNEL);
701 cmd->destination_type = destination_type;
702 cmd->number_destination_params = number_destination_params;
707 memcpy(cmd->params, params, params_len);
708 if (params->length > 0)
709 memcpy(&ndev->cur_params,
710 ¶ms->value[DEST_SPEC_PARAMS_ID_INDEX],
711 sizeof(struct dest_spec_params));
713 ndev->cur_params.id = 0;
715 ndev->cur_params.id = 0;
717 ndev->cur_dest_type = destination_type;
719 r = __nci_request(ndev, nci_core_conn_create_req, &data,
720 msecs_to_jiffies(NCI_CMD_TIMEOUT));
724 EXPORT_SYMBOL(nci_core_conn_create);
726 static void nci_core_conn_close_req(struct nci_dev *ndev, const void *opt)
728 __u8 conn_id = (unsigned long)opt;
730 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id);
733 int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id)
735 unsigned long opt = conn_id;
737 ndev->cur_conn_id = conn_id;
738 return __nci_request(ndev, nci_core_conn_close_req, (void *)opt,
739 msecs_to_jiffies(NCI_CMD_TIMEOUT));
741 EXPORT_SYMBOL(nci_core_conn_close);
743 static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
745 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
746 struct nci_set_config_param param;
749 param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len);
750 if ((param.val == NULL) || (param.len == 0))
753 if (param.len > NFC_MAX_GT_LEN)
756 param.id = NCI_PN_ATR_REQ_GEN_BYTES;
758 rc = nci_request(ndev, nci_set_config_req, ¶m,
759 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
763 param.id = NCI_LN_ATR_RES_GEN_BYTES;
765 return nci_request(ndev, nci_set_config_req, ¶m,
766 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
769 static int nci_set_listen_parameters(struct nfc_dev *nfc_dev)
771 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
775 val = NCI_LA_SEL_INFO_NFC_DEP_MASK;
777 rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val);
781 val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK;
783 rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val);
787 val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424;
789 return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val);
792 static int nci_start_poll(struct nfc_dev *nfc_dev,
793 __u32 im_protocols, __u32 tm_protocols)
795 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
796 struct nci_rf_discover_param param;
799 if ((atomic_read(&ndev->state) == NCI_DISCOVERY) ||
800 (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) {
801 pr_err("unable to start poll, since poll is already active\n");
805 if (ndev->target_active_prot) {
806 pr_err("there is an active target\n");
810 if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) ||
811 (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) {
812 pr_debug("target active or w4 select, implicitly deactivate\n");
814 rc = nci_request(ndev, nci_rf_deactivate_req,
815 (void *)NCI_DEACTIVATE_TYPE_IDLE_MODE,
816 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
821 if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
822 rc = nci_set_local_general_bytes(nfc_dev);
824 pr_err("failed to set local general bytes\n");
829 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
830 rc = nci_set_listen_parameters(nfc_dev);
832 pr_err("failed to set listen parameters\n");
835 param.im_protocols = im_protocols;
836 param.tm_protocols = tm_protocols;
837 rc = nci_request(ndev, nci_rf_discover_req, ¶m,
838 msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
841 ndev->poll_prots = im_protocols;
846 static void nci_stop_poll(struct nfc_dev *nfc_dev)
848 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
850 if ((atomic_read(&ndev->state) != NCI_DISCOVERY) &&
851 (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) {
852 pr_err("unable to stop poll, since poll is not active\n");
856 nci_request(ndev, nci_rf_deactivate_req,
857 (void *)NCI_DEACTIVATE_TYPE_IDLE_MODE,
858 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
861 static int nci_activate_target(struct nfc_dev *nfc_dev,
862 struct nfc_target *target, __u32 protocol)
864 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
865 struct nci_rf_discover_select_param param;
866 const struct nfc_target *nci_target = NULL;
870 pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol);
872 if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) &&
873 (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
874 pr_err("there is no available target to activate\n");
878 if (ndev->target_active_prot) {
879 pr_err("there is already an active target\n");
883 for (i = 0; i < ndev->n_targets; i++) {
884 if (ndev->targets[i].idx == target->idx) {
885 nci_target = &ndev->targets[i];
891 pr_err("unable to find the selected target\n");
895 if (!(nci_target->supported_protocols & (1 << protocol))) {
896 pr_err("target does not support the requested protocol 0x%x\n",
901 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
902 param.rf_discovery_id = nci_target->logical_idx;
904 if (protocol == NFC_PROTO_JEWEL)
905 param.rf_protocol = NCI_RF_PROTOCOL_T1T;
906 else if (protocol == NFC_PROTO_MIFARE)
907 param.rf_protocol = NCI_RF_PROTOCOL_T2T;
908 else if (protocol == NFC_PROTO_FELICA)
909 param.rf_protocol = NCI_RF_PROTOCOL_T3T;
910 else if (protocol == NFC_PROTO_ISO14443 ||
911 protocol == NFC_PROTO_ISO14443_B)
912 param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
914 param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
916 rc = nci_request(ndev, nci_rf_discover_select_req, ¶m,
917 msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT));
921 ndev->target_active_prot = protocol;
926 static void nci_deactivate_target(struct nfc_dev *nfc_dev,
927 struct nfc_target *target,
930 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
931 unsigned long nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE;
935 if (!ndev->target_active_prot) {
936 pr_err("unable to deactivate target, no active target\n");
940 ndev->target_active_prot = 0;
943 case NFC_TARGET_MODE_SLEEP:
944 nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE;
948 if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
949 nci_request(ndev, nci_rf_deactivate_req, (void *)nci_mode,
950 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
954 static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
955 __u8 comm_mode, __u8 *gb, size_t gb_len)
957 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
960 pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
962 rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
966 rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
967 ndev->remote_gb_len);
969 rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
975 static int nci_dep_link_down(struct nfc_dev *nfc_dev)
977 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
982 if (nfc_dev->rf_mode == NFC_RF_INITIATOR) {
983 nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE);
985 if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE ||
986 atomic_read(&ndev->state) == NCI_DISCOVERY) {
987 nci_request(ndev, nci_rf_deactivate_req, (void *)0,
988 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
991 rc = nfc_tm_deactivated(nfc_dev);
993 pr_err("error when signaling tm deactivation\n");
1000 static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
1001 struct sk_buff *skb,
1002 data_exchange_cb_t cb, void *cb_context)
1004 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1006 struct nci_conn_info *conn_info;
1008 conn_info = ndev->rf_conn_info;
1012 pr_debug("target_idx %d, len %d\n", target->idx, skb->len);
1014 if (!ndev->target_active_prot) {
1015 pr_err("unable to exchange data, no active target\n");
1019 if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1022 /* store cb and context to be used on receiving data */
1023 conn_info->data_exchange_cb = cb;
1024 conn_info->data_exchange_cb_context = cb_context;
1026 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1028 clear_bit(NCI_DATA_EXCHANGE, &ndev->flags);
1033 static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
1035 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1038 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1040 pr_err("unable to send data\n");
1045 static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1047 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1049 if (ndev->ops->enable_se)
1050 return ndev->ops->enable_se(ndev, se_idx);
1055 static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1057 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1059 if (ndev->ops->disable_se)
1060 return ndev->ops->disable_se(ndev, se_idx);
1065 static int nci_discover_se(struct nfc_dev *nfc_dev)
1068 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1070 if (ndev->ops->discover_se) {
1071 r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE);
1072 if (r != NCI_STATUS_OK)
1075 return ndev->ops->discover_se(ndev);
1081 static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx,
1082 u8 *apdu, size_t apdu_length,
1083 se_io_cb_t cb, void *cb_context)
1085 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1087 if (ndev->ops->se_io)
1088 return ndev->ops->se_io(ndev, se_idx, apdu,
1089 apdu_length, cb, cb_context);
1094 static int nci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name)
1096 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1098 if (!ndev->ops->fw_download)
1101 return ndev->ops->fw_download(ndev, firmware_name);
1104 static const struct nfc_ops nci_nfc_ops = {
1105 .dev_up = nci_dev_up,
1106 .dev_down = nci_dev_down,
1107 .start_poll = nci_start_poll,
1108 .stop_poll = nci_stop_poll,
1109 .dep_link_up = nci_dep_link_up,
1110 .dep_link_down = nci_dep_link_down,
1111 .activate_target = nci_activate_target,
1112 .deactivate_target = nci_deactivate_target,
1113 .im_transceive = nci_transceive,
1114 .tm_send = nci_tm_send,
1115 .enable_se = nci_enable_se,
1116 .disable_se = nci_disable_se,
1117 .discover_se = nci_discover_se,
1119 .fw_download = nci_fw_download,
1122 /* ---- Interface to NCI drivers ---- */
1124 * nci_allocate_device - allocate a new nci device
1126 * @ops: device operations
1127 * @supported_protocols: NFC protocols supported by the device
1128 * @tx_headroom: Reserved space at beginning of skb
1129 * @tx_tailroom: Reserved space at end of skb
1131 struct nci_dev *nci_allocate_device(const struct nci_ops *ops,
1132 __u32 supported_protocols,
1133 int tx_headroom, int tx_tailroom)
1135 struct nci_dev *ndev;
1137 pr_debug("supported_protocols 0x%x\n", supported_protocols);
1139 if (!ops->open || !ops->close || !ops->send)
1142 if (!supported_protocols)
1145 ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL);
1151 if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) {
1152 pr_err("Too many proprietary commands: %zd\n",
1157 ndev->tx_headroom = tx_headroom;
1158 ndev->tx_tailroom = tx_tailroom;
1159 init_completion(&ndev->req_completion);
1161 ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
1162 supported_protocols,
1163 tx_headroom + NCI_DATA_HDR_SIZE,
1168 ndev->hci_dev = nci_hci_allocate(ndev);
1172 nfc_set_drvdata(ndev->nfc_dev, ndev);
1177 nfc_free_device(ndev->nfc_dev);
1182 EXPORT_SYMBOL(nci_allocate_device);
1185 * nci_free_device - deallocate nci device
1187 * @ndev: The nci device to deallocate
1189 void nci_free_device(struct nci_dev *ndev)
1191 nfc_free_device(ndev->nfc_dev);
1192 nci_hci_deallocate(ndev);
1195 EXPORT_SYMBOL(nci_free_device);
1198 * nci_register_device - register a nci device in the nfc subsystem
1200 * @ndev: The nci device to register
1202 int nci_register_device(struct nci_dev *ndev)
1205 struct device *dev = &ndev->nfc_dev->dev;
1210 INIT_WORK(&ndev->cmd_work, nci_cmd_work);
1211 snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev));
1212 ndev->cmd_wq = create_singlethread_workqueue(name);
1213 if (!ndev->cmd_wq) {
1218 INIT_WORK(&ndev->rx_work, nci_rx_work);
1219 snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev));
1220 ndev->rx_wq = create_singlethread_workqueue(name);
1223 goto destroy_cmd_wq_exit;
1226 INIT_WORK(&ndev->tx_work, nci_tx_work);
1227 snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev));
1228 ndev->tx_wq = create_singlethread_workqueue(name);
1231 goto destroy_rx_wq_exit;
1234 skb_queue_head_init(&ndev->cmd_q);
1235 skb_queue_head_init(&ndev->rx_q);
1236 skb_queue_head_init(&ndev->tx_q);
1238 timer_setup(&ndev->cmd_timer, nci_cmd_timer, 0);
1239 timer_setup(&ndev->data_timer, nci_data_timer, 0);
1241 mutex_init(&ndev->req_lock);
1242 INIT_LIST_HEAD(&ndev->conn_info_list);
1244 rc = nfc_register_device(ndev->nfc_dev);
1246 goto destroy_tx_wq_exit;
1251 destroy_workqueue(ndev->tx_wq);
1254 destroy_workqueue(ndev->rx_wq);
1256 destroy_cmd_wq_exit:
1257 destroy_workqueue(ndev->cmd_wq);
1262 EXPORT_SYMBOL(nci_register_device);
1265 * nci_unregister_device - unregister a nci device in the nfc subsystem
1267 * @ndev: The nci device to unregister
1269 void nci_unregister_device(struct nci_dev *ndev)
1271 struct nci_conn_info *conn_info, *n;
1273 nci_close_device(ndev);
1275 destroy_workqueue(ndev->cmd_wq);
1276 destroy_workqueue(ndev->rx_wq);
1277 destroy_workqueue(ndev->tx_wq);
1279 list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) {
1280 list_del(&conn_info->list);
1281 /* conn_info is allocated with devm_kzalloc */
1284 nfc_unregister_device(ndev->nfc_dev);
1286 EXPORT_SYMBOL(nci_unregister_device);
1289 * nci_recv_frame - receive frame from NCI drivers
1291 * @ndev: The nci device
1292 * @skb: The sk_buff to receive
1294 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
1296 pr_debug("len %d\n", skb->len);
1298 if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
1299 !test_bit(NCI_INIT, &ndev->flags))) {
1304 /* Queue frame for rx worker thread */
1305 skb_queue_tail(&ndev->rx_q, skb);
1306 queue_work(ndev->rx_wq, &ndev->rx_work);
1310 EXPORT_SYMBOL(nci_recv_frame);
1312 int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb)
1314 pr_debug("len %d\n", skb->len);
1321 /* Get rid of skb owner, prior to sending to the driver. */
1324 /* Send copy to sniffer */
1325 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1326 RAW_PAYLOAD_NCI, NFC_DIRECTION_TX);
1328 return ndev->ops->send(ndev, skb);
1330 EXPORT_SYMBOL(nci_send_frame);
1332 /* Send NCI command */
1333 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, const void *payload)
1335 struct nci_ctrl_hdr *hdr;
1336 struct sk_buff *skb;
1338 pr_debug("opcode 0x%x, plen %d\n", opcode, plen);
1340 skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL);
1342 pr_err("no memory for command\n");
1346 hdr = skb_put(skb, NCI_CTRL_HDR_SIZE);
1347 hdr->gid = nci_opcode_gid(opcode);
1348 hdr->oid = nci_opcode_oid(opcode);
1351 nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT);
1352 nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST);
1355 skb_put_data(skb, payload, plen);
1357 skb_queue_tail(&ndev->cmd_q, skb);
1358 queue_work(ndev->cmd_wq, &ndev->cmd_work);
1362 EXPORT_SYMBOL(nci_send_cmd);
1364 /* Proprietary commands API */
1365 static const struct nci_driver_ops *ops_cmd_lookup(const struct nci_driver_ops *ops,
1370 const struct nci_driver_ops *op;
1375 for (i = 0; i < n_ops; i++) {
1377 if (op->opcode == opcode)
1384 static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode,
1385 struct sk_buff *skb, const struct nci_driver_ops *ops,
1388 const struct nci_driver_ops *op;
1390 op = ops_cmd_lookup(ops, n_ops, rsp_opcode);
1391 if (!op || !op->rsp)
1394 return op->rsp(ndev, skb);
1397 static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode,
1398 struct sk_buff *skb, const struct nci_driver_ops *ops,
1401 const struct nci_driver_ops *op;
1403 op = ops_cmd_lookup(ops, n_ops, ntf_opcode);
1404 if (!op || !op->ntf)
1407 return op->ntf(ndev, skb);
1410 int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1411 struct sk_buff *skb)
1413 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1414 ndev->ops->n_prop_ops);
1417 int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1418 struct sk_buff *skb)
1420 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1421 ndev->ops->n_prop_ops);
1424 int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1425 struct sk_buff *skb)
1427 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops,
1428 ndev->ops->n_core_ops);
1431 int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1432 struct sk_buff *skb)
1434 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops,
1435 ndev->ops->n_core_ops);
1438 /* ---- NCI TX Data worker thread ---- */
1440 static void nci_tx_work(struct work_struct *work)
1442 struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work);
1443 struct nci_conn_info *conn_info;
1444 struct sk_buff *skb;
1446 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
1450 pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt));
1452 /* Send queued tx data */
1453 while (atomic_read(&conn_info->credits_cnt)) {
1454 skb = skb_dequeue(&ndev->tx_q);
1458 /* Check if data flow control is used */
1459 if (atomic_read(&conn_info->credits_cnt) !=
1460 NCI_DATA_FLOW_CONTROL_NOT_USED)
1461 atomic_dec(&conn_info->credits_cnt);
1463 pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n",
1465 nci_conn_id(skb->data),
1466 nci_plen(skb->data));
1468 nci_send_frame(ndev, skb);
1470 mod_timer(&ndev->data_timer,
1471 jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT));
1475 /* ----- NCI RX worker thread (data & control) ----- */
1477 static void nci_rx_work(struct work_struct *work)
1479 struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work);
1480 struct sk_buff *skb;
1482 while ((skb = skb_dequeue(&ndev->rx_q))) {
1484 /* Send copy to sniffer */
1485 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1486 RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);
1489 switch (nci_mt(skb->data)) {
1490 case NCI_MT_RSP_PKT:
1491 nci_rsp_packet(ndev, skb);
1494 case NCI_MT_NTF_PKT:
1495 nci_ntf_packet(ndev, skb);
1498 case NCI_MT_DATA_PKT:
1499 nci_rx_data_packet(ndev, skb);
1503 pr_err("unknown MT 0x%x\n", nci_mt(skb->data));
1509 /* check if a data exchange timeout has occurred */
1510 if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) {
1511 /* complete the data exchange transaction, if exists */
1512 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1513 nci_data_exchange_complete(ndev, NULL,
1517 clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
1521 /* ----- NCI TX CMD worker thread ----- */
1523 static void nci_cmd_work(struct work_struct *work)
1525 struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work);
1526 struct sk_buff *skb;
1528 pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt));
1530 /* Send queued command */
1531 if (atomic_read(&ndev->cmd_cnt)) {
1532 skb = skb_dequeue(&ndev->cmd_q);
1536 atomic_dec(&ndev->cmd_cnt);
1538 pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
1540 nci_opcode_gid(nci_opcode(skb->data)),
1541 nci_opcode_oid(nci_opcode(skb->data)),
1542 nci_plen(skb->data));
1544 nci_send_frame(ndev, skb);
1546 mod_timer(&ndev->cmd_timer,
1547 jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT));
1551 MODULE_LICENSE("GPL");