2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
5 * Copyright (C) 2011 Texas Instruments, Inc.
6 * Copyright (C) 2014 Marvell International Ltd.
8 * Written by Ilan Elias <ilane@ti.com>
11 * This file is based on hci_core.c, which was written
12 * by Maxim Krasnyansky.
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2
16 * as published by the Free Software Foundation
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see <http://www.gnu.org/licenses/>.
28 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/types.h>
33 #include <linux/workqueue.h>
34 #include <linux/completion.h>
35 #include <linux/export.h>
36 #include <linux/sched.h>
37 #include <linux/bitops.h>
38 #include <linux/skbuff.h>
41 #include <net/nfc/nci.h>
42 #include <net/nfc/nci_core.h>
43 #include <linux/nfc.h>
45 struct core_conn_create_data
{
47 struct nci_core_conn_create_cmd
*cmd
;
50 static void nci_cmd_work(struct work_struct
*work
);
51 static void nci_rx_work(struct work_struct
*work
);
52 static void nci_tx_work(struct work_struct
*work
);
54 struct nci_conn_info
*nci_get_conn_info_by_conn_id(struct nci_dev
*ndev
,
57 struct nci_conn_info
*conn_info
;
59 list_for_each_entry(conn_info
, &ndev
->conn_info_list
, list
) {
60 if (conn_info
->conn_id
== conn_id
)
67 /* ---- NCI requests ---- */
69 void nci_req_complete(struct nci_dev
*ndev
, int result
)
71 if (ndev
->req_status
== NCI_REQ_PEND
) {
72 ndev
->req_result
= result
;
73 ndev
->req_status
= NCI_REQ_DONE
;
74 complete(&ndev
->req_completion
);
78 static void nci_req_cancel(struct nci_dev
*ndev
, int err
)
80 if (ndev
->req_status
== NCI_REQ_PEND
) {
81 ndev
->req_result
= err
;
82 ndev
->req_status
= NCI_REQ_CANCELED
;
83 complete(&ndev
->req_completion
);
87 /* Execute request and wait for completion. */
88 static int __nci_request(struct nci_dev
*ndev
,
89 void (*req
)(struct nci_dev
*ndev
, unsigned long opt
),
90 unsigned long opt
, __u32 timeout
)
95 ndev
->req_status
= NCI_REQ_PEND
;
97 reinit_completion(&ndev
->req_completion
);
100 wait_for_completion_interruptible_timeout(&ndev
->req_completion
,
103 pr_debug("wait_for_completion return %ld\n", completion_rc
);
105 if (completion_rc
> 0) {
106 switch (ndev
->req_status
) {
108 rc
= nci_to_errno(ndev
->req_result
);
111 case NCI_REQ_CANCELED
:
112 rc
= -ndev
->req_result
;
120 pr_err("wait_for_completion_interruptible_timeout failed %ld\n",
123 rc
= ((completion_rc
== 0) ? (-ETIMEDOUT
) : (completion_rc
));
126 ndev
->req_status
= ndev
->req_result
= 0;
131 inline int nci_request(struct nci_dev
*ndev
,
132 void (*req
)(struct nci_dev
*ndev
,
134 unsigned long opt
, __u32 timeout
)
138 if (!test_bit(NCI_UP
, &ndev
->flags
))
141 /* Serialize all requests */
142 mutex_lock(&ndev
->req_lock
);
143 rc
= __nci_request(ndev
, req
, opt
, timeout
);
144 mutex_unlock(&ndev
->req_lock
);
149 static void nci_reset_req(struct nci_dev
*ndev
, unsigned long opt
)
151 struct nci_core_reset_cmd cmd
;
153 cmd
.reset_type
= NCI_RESET_TYPE_RESET_CONFIG
;
154 nci_send_cmd(ndev
, NCI_OP_CORE_RESET_CMD
, 1, &cmd
);
157 static void nci_init_req(struct nci_dev
*ndev
, unsigned long opt
)
159 nci_send_cmd(ndev
, NCI_OP_CORE_INIT_CMD
, 0, NULL
);
162 static void nci_init_complete_req(struct nci_dev
*ndev
, unsigned long opt
)
164 struct nci_rf_disc_map_cmd cmd
;
165 struct disc_map_config
*cfg
= cmd
.mapping_configs
;
166 __u8
*num
= &cmd
.num_mapping_configs
;
169 /* set rf mapping configurations */
172 /* by default mapping is set to NCI_RF_INTERFACE_FRAME */
173 for (i
= 0; i
< ndev
->num_supported_rf_interfaces
; i
++) {
174 if (ndev
->supported_rf_interfaces
[i
] ==
175 NCI_RF_INTERFACE_ISO_DEP
) {
176 cfg
[*num
].rf_protocol
= NCI_RF_PROTOCOL_ISO_DEP
;
177 cfg
[*num
].mode
= NCI_DISC_MAP_MODE_POLL
|
178 NCI_DISC_MAP_MODE_LISTEN
;
179 cfg
[*num
].rf_interface
= NCI_RF_INTERFACE_ISO_DEP
;
181 } else if (ndev
->supported_rf_interfaces
[i
] ==
182 NCI_RF_INTERFACE_NFC_DEP
) {
183 cfg
[*num
].rf_protocol
= NCI_RF_PROTOCOL_NFC_DEP
;
184 cfg
[*num
].mode
= NCI_DISC_MAP_MODE_POLL
|
185 NCI_DISC_MAP_MODE_LISTEN
;
186 cfg
[*num
].rf_interface
= NCI_RF_INTERFACE_NFC_DEP
;
190 if (*num
== NCI_MAX_NUM_MAPPING_CONFIGS
)
194 nci_send_cmd(ndev
, NCI_OP_RF_DISCOVER_MAP_CMD
,
195 (1 + ((*num
) * sizeof(struct disc_map_config
))), &cmd
);
198 struct nci_set_config_param
{
204 static void nci_set_config_req(struct nci_dev
*ndev
, unsigned long opt
)
206 struct nci_set_config_param
*param
= (struct nci_set_config_param
*)opt
;
207 struct nci_core_set_config_cmd cmd
;
209 BUG_ON(param
->len
> NCI_MAX_PARAM_LEN
);
212 cmd
.param
.id
= param
->id
;
213 cmd
.param
.len
= param
->len
;
214 memcpy(cmd
.param
.val
, param
->val
, param
->len
);
216 nci_send_cmd(ndev
, NCI_OP_CORE_SET_CONFIG_CMD
, (3 + param
->len
), &cmd
);
219 struct nci_rf_discover_param
{
224 static void nci_rf_discover_req(struct nci_dev
*ndev
, unsigned long opt
)
226 struct nci_rf_discover_param
*param
=
227 (struct nci_rf_discover_param
*)opt
;
228 struct nci_rf_disc_cmd cmd
;
230 cmd
.num_disc_configs
= 0;
232 if ((cmd
.num_disc_configs
< NCI_MAX_NUM_RF_CONFIGS
) &&
233 (param
->im_protocols
& NFC_PROTO_JEWEL_MASK
||
234 param
->im_protocols
& NFC_PROTO_MIFARE_MASK
||
235 param
->im_protocols
& NFC_PROTO_ISO14443_MASK
||
236 param
->im_protocols
& NFC_PROTO_NFC_DEP_MASK
)) {
237 cmd
.disc_configs
[cmd
.num_disc_configs
].rf_tech_and_mode
=
238 NCI_NFC_A_PASSIVE_POLL_MODE
;
239 cmd
.disc_configs
[cmd
.num_disc_configs
].frequency
= 1;
240 cmd
.num_disc_configs
++;
243 if ((cmd
.num_disc_configs
< NCI_MAX_NUM_RF_CONFIGS
) &&
244 (param
->im_protocols
& NFC_PROTO_ISO14443_B_MASK
)) {
245 cmd
.disc_configs
[cmd
.num_disc_configs
].rf_tech_and_mode
=
246 NCI_NFC_B_PASSIVE_POLL_MODE
;
247 cmd
.disc_configs
[cmd
.num_disc_configs
].frequency
= 1;
248 cmd
.num_disc_configs
++;
251 if ((cmd
.num_disc_configs
< NCI_MAX_NUM_RF_CONFIGS
) &&
252 (param
->im_protocols
& NFC_PROTO_FELICA_MASK
||
253 param
->im_protocols
& NFC_PROTO_NFC_DEP_MASK
)) {
254 cmd
.disc_configs
[cmd
.num_disc_configs
].rf_tech_and_mode
=
255 NCI_NFC_F_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_ISO15693_MASK
)) {
262 cmd
.disc_configs
[cmd
.num_disc_configs
].rf_tech_and_mode
=
263 NCI_NFC_V_PASSIVE_POLL_MODE
;
264 cmd
.disc_configs
[cmd
.num_disc_configs
].frequency
= 1;
265 cmd
.num_disc_configs
++;
268 if ((cmd
.num_disc_configs
< NCI_MAX_NUM_RF_CONFIGS
- 1) &&
269 (param
->tm_protocols
& NFC_PROTO_NFC_DEP_MASK
)) {
270 cmd
.disc_configs
[cmd
.num_disc_configs
].rf_tech_and_mode
=
271 NCI_NFC_A_PASSIVE_LISTEN_MODE
;
272 cmd
.disc_configs
[cmd
.num_disc_configs
].frequency
= 1;
273 cmd
.num_disc_configs
++;
274 cmd
.disc_configs
[cmd
.num_disc_configs
].rf_tech_and_mode
=
275 NCI_NFC_F_PASSIVE_LISTEN_MODE
;
276 cmd
.disc_configs
[cmd
.num_disc_configs
].frequency
= 1;
277 cmd
.num_disc_configs
++;
280 nci_send_cmd(ndev
, NCI_OP_RF_DISCOVER_CMD
,
281 (1 + (cmd
.num_disc_configs
* sizeof(struct disc_config
))),
285 struct nci_rf_discover_select_param
{
286 __u8 rf_discovery_id
;
290 static void nci_rf_discover_select_req(struct nci_dev
*ndev
, unsigned long opt
)
292 struct nci_rf_discover_select_param
*param
=
293 (struct nci_rf_discover_select_param
*)opt
;
294 struct nci_rf_discover_select_cmd cmd
;
296 cmd
.rf_discovery_id
= param
->rf_discovery_id
;
297 cmd
.rf_protocol
= param
->rf_protocol
;
299 switch (cmd
.rf_protocol
) {
300 case NCI_RF_PROTOCOL_ISO_DEP
:
301 cmd
.rf_interface
= NCI_RF_INTERFACE_ISO_DEP
;
304 case NCI_RF_PROTOCOL_NFC_DEP
:
305 cmd
.rf_interface
= NCI_RF_INTERFACE_NFC_DEP
;
309 cmd
.rf_interface
= NCI_RF_INTERFACE_FRAME
;
313 nci_send_cmd(ndev
, NCI_OP_RF_DISCOVER_SELECT_CMD
,
314 sizeof(struct nci_rf_discover_select_cmd
), &cmd
);
317 static void nci_rf_deactivate_req(struct nci_dev
*ndev
, unsigned long opt
)
319 struct nci_rf_deactivate_cmd cmd
;
323 nci_send_cmd(ndev
, NCI_OP_RF_DEACTIVATE_CMD
,
324 sizeof(struct nci_rf_deactivate_cmd
), &cmd
);
327 static int nci_open_device(struct nci_dev
*ndev
)
331 mutex_lock(&ndev
->req_lock
);
333 if (test_bit(NCI_UP
, &ndev
->flags
)) {
338 if (ndev
->ops
->open(ndev
)) {
343 atomic_set(&ndev
->cmd_cnt
, 1);
345 set_bit(NCI_INIT
, &ndev
->flags
);
347 rc
= __nci_request(ndev
, nci_reset_req
, 0,
348 msecs_to_jiffies(NCI_RESET_TIMEOUT
));
350 if (!rc
&& ndev
->ops
->setup
) {
351 rc
= ndev
->ops
->setup(ndev
);
355 rc
= __nci_request(ndev
, nci_init_req
, 0,
356 msecs_to_jiffies(NCI_INIT_TIMEOUT
));
360 rc
= __nci_request(ndev
, nci_init_complete_req
, 0,
361 msecs_to_jiffies(NCI_INIT_TIMEOUT
));
364 clear_bit(NCI_INIT
, &ndev
->flags
);
367 set_bit(NCI_UP
, &ndev
->flags
);
368 nci_clear_target_list(ndev
);
369 atomic_set(&ndev
->state
, NCI_IDLE
);
371 /* Init failed, cleanup */
372 skb_queue_purge(&ndev
->cmd_q
);
373 skb_queue_purge(&ndev
->rx_q
);
374 skb_queue_purge(&ndev
->tx_q
);
376 ndev
->ops
->close(ndev
);
381 mutex_unlock(&ndev
->req_lock
);
385 static int nci_close_device(struct nci_dev
*ndev
)
387 nci_req_cancel(ndev
, ENODEV
);
388 mutex_lock(&ndev
->req_lock
);
390 if (!test_and_clear_bit(NCI_UP
, &ndev
->flags
)) {
391 del_timer_sync(&ndev
->cmd_timer
);
392 del_timer_sync(&ndev
->data_timer
);
393 mutex_unlock(&ndev
->req_lock
);
397 /* Drop RX and TX queues */
398 skb_queue_purge(&ndev
->rx_q
);
399 skb_queue_purge(&ndev
->tx_q
);
401 /* Flush RX and TX wq */
402 flush_workqueue(ndev
->rx_wq
);
403 flush_workqueue(ndev
->tx_wq
);
406 skb_queue_purge(&ndev
->cmd_q
);
407 atomic_set(&ndev
->cmd_cnt
, 1);
409 set_bit(NCI_INIT
, &ndev
->flags
);
410 __nci_request(ndev
, nci_reset_req
, 0,
411 msecs_to_jiffies(NCI_RESET_TIMEOUT
));
412 clear_bit(NCI_INIT
, &ndev
->flags
);
414 del_timer_sync(&ndev
->cmd_timer
);
417 flush_workqueue(ndev
->cmd_wq
);
419 /* After this point our queues are empty
420 * and no works are scheduled. */
421 ndev
->ops
->close(ndev
);
426 mutex_unlock(&ndev
->req_lock
);
431 /* NCI command timer function */
432 static void nci_cmd_timer(unsigned long arg
)
434 struct nci_dev
*ndev
= (void *) arg
;
436 atomic_set(&ndev
->cmd_cnt
, 1);
437 queue_work(ndev
->cmd_wq
, &ndev
->cmd_work
);
440 /* NCI data exchange timer function */
441 static void nci_data_timer(unsigned long arg
)
443 struct nci_dev
*ndev
= (void *) arg
;
445 set_bit(NCI_DATA_EXCHANGE_TO
, &ndev
->flags
);
446 queue_work(ndev
->rx_wq
, &ndev
->rx_work
);
449 static int nci_dev_up(struct nfc_dev
*nfc_dev
)
451 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
453 return nci_open_device(ndev
);
456 static int nci_dev_down(struct nfc_dev
*nfc_dev
)
458 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
460 return nci_close_device(ndev
);
463 int nci_set_config(struct nci_dev
*ndev
, __u8 id
, size_t len
, __u8
*val
)
465 struct nci_set_config_param param
;
474 return __nci_request(ndev
, nci_set_config_req
, (unsigned long)¶m
,
475 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT
));
477 EXPORT_SYMBOL(nci_set_config
);
479 static void nci_nfcee_discover_req(struct nci_dev
*ndev
, unsigned long opt
)
481 struct nci_nfcee_discover_cmd cmd
;
484 cmd
.discovery_action
= action
;
486 nci_send_cmd(ndev
, NCI_OP_NFCEE_DISCOVER_CMD
, 1, &cmd
);
489 int nci_nfcee_discover(struct nci_dev
*ndev
, u8 action
)
491 return nci_request(ndev
, nci_nfcee_discover_req
, action
,
492 msecs_to_jiffies(NCI_CMD_TIMEOUT
));
494 EXPORT_SYMBOL(nci_nfcee_discover
);
496 static void nci_nfcee_mode_set_req(struct nci_dev
*ndev
, unsigned long opt
)
498 struct nci_nfcee_mode_set_cmd
*cmd
=
499 (struct nci_nfcee_mode_set_cmd
*)opt
;
501 nci_send_cmd(ndev
, NCI_OP_NFCEE_MODE_SET_CMD
,
502 sizeof(struct nci_nfcee_mode_set_cmd
), cmd
);
505 int nci_nfcee_mode_set(struct nci_dev
*ndev
, u8 nfcee_id
, u8 nfcee_mode
)
507 struct nci_nfcee_mode_set_cmd cmd
;
509 cmd
.nfcee_id
= nfcee_id
;
510 cmd
.nfcee_mode
= nfcee_mode
;
512 return nci_request(ndev
, nci_nfcee_mode_set_req
, (unsigned long)&cmd
,
513 msecs_to_jiffies(NCI_CMD_TIMEOUT
));
515 EXPORT_SYMBOL(nci_nfcee_mode_set
);
517 static void nci_core_conn_create_req(struct nci_dev
*ndev
, unsigned long opt
)
519 struct core_conn_create_data
*data
=
520 (struct core_conn_create_data
*)opt
;
522 nci_send_cmd(ndev
, NCI_OP_CORE_CONN_CREATE_CMD
, data
->length
, data
->cmd
);
525 int nci_core_conn_create(struct nci_dev
*ndev
, u8 destination_type
,
526 u8 number_destination_params
,
528 struct core_conn_create_dest_spec_params
*params
)
531 struct nci_core_conn_create_cmd
*cmd
;
532 struct core_conn_create_data data
;
534 data
.length
= params_len
+ sizeof(struct nci_core_conn_create_cmd
);
535 cmd
= kzalloc(data
.length
, GFP_KERNEL
);
539 cmd
->destination_type
= destination_type
;
540 cmd
->number_destination_params
= number_destination_params
;
541 memcpy(cmd
->params
, params
, params_len
);
544 ndev
->cur_id
= params
->value
[DEST_SPEC_PARAMS_ID_INDEX
];
546 r
= __nci_request(ndev
, nci_core_conn_create_req
,
547 (unsigned long)&data
,
548 msecs_to_jiffies(NCI_CMD_TIMEOUT
));
552 EXPORT_SYMBOL(nci_core_conn_create
);
554 static void nci_core_conn_close_req(struct nci_dev
*ndev
, unsigned long opt
)
558 nci_send_cmd(ndev
, NCI_OP_CORE_CONN_CLOSE_CMD
, 1, &conn_id
);
561 int nci_core_conn_close(struct nci_dev
*ndev
, u8 conn_id
)
563 return nci_request(ndev
, nci_core_conn_close_req
, conn_id
,
564 msecs_to_jiffies(NCI_CMD_TIMEOUT
));
566 EXPORT_SYMBOL(nci_core_conn_close
);
568 static int nci_set_local_general_bytes(struct nfc_dev
*nfc_dev
)
570 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
571 struct nci_set_config_param param
;
574 param
.val
= nfc_get_local_general_bytes(nfc_dev
, ¶m
.len
);
575 if ((param
.val
== NULL
) || (param
.len
== 0))
578 if (param
.len
> NFC_MAX_GT_LEN
)
581 param
.id
= NCI_PN_ATR_REQ_GEN_BYTES
;
583 rc
= nci_request(ndev
, nci_set_config_req
, (unsigned long)¶m
,
584 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT
));
588 param
.id
= NCI_LN_ATR_RES_GEN_BYTES
;
590 return nci_request(ndev
, nci_set_config_req
, (unsigned long)¶m
,
591 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT
));
594 static int nci_set_listen_parameters(struct nfc_dev
*nfc_dev
)
596 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
600 val
= NCI_LA_SEL_INFO_NFC_DEP_MASK
;
602 rc
= nci_set_config(ndev
, NCI_LA_SEL_INFO
, 1, &val
);
606 val
= NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK
;
608 rc
= nci_set_config(ndev
, NCI_LF_PROTOCOL_TYPE
, 1, &val
);
612 val
= NCI_LF_CON_BITR_F_212
| NCI_LF_CON_BITR_F_424
;
614 return nci_set_config(ndev
, NCI_LF_CON_BITR_F
, 1, &val
);
617 static int nci_start_poll(struct nfc_dev
*nfc_dev
,
618 __u32 im_protocols
, __u32 tm_protocols
)
620 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
621 struct nci_rf_discover_param param
;
624 if ((atomic_read(&ndev
->state
) == NCI_DISCOVERY
) ||
625 (atomic_read(&ndev
->state
) == NCI_W4_ALL_DISCOVERIES
)) {
626 pr_err("unable to start poll, since poll is already active\n");
630 if (ndev
->target_active_prot
) {
631 pr_err("there is an active target\n");
635 if ((atomic_read(&ndev
->state
) == NCI_W4_HOST_SELECT
) ||
636 (atomic_read(&ndev
->state
) == NCI_POLL_ACTIVE
)) {
637 pr_debug("target active or w4 select, implicitly deactivate\n");
639 rc
= nci_request(ndev
, nci_rf_deactivate_req
,
640 NCI_DEACTIVATE_TYPE_IDLE_MODE
,
641 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT
));
646 if ((im_protocols
| tm_protocols
) & NFC_PROTO_NFC_DEP_MASK
) {
647 rc
= nci_set_local_general_bytes(nfc_dev
);
649 pr_err("failed to set local general bytes\n");
654 if (tm_protocols
& NFC_PROTO_NFC_DEP_MASK
) {
655 rc
= nci_set_listen_parameters(nfc_dev
);
657 pr_err("failed to set listen parameters\n");
660 param
.im_protocols
= im_protocols
;
661 param
.tm_protocols
= tm_protocols
;
662 rc
= nci_request(ndev
, nci_rf_discover_req
, (unsigned long)¶m
,
663 msecs_to_jiffies(NCI_RF_DISC_TIMEOUT
));
666 ndev
->poll_prots
= im_protocols
;
671 static void nci_stop_poll(struct nfc_dev
*nfc_dev
)
673 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
675 if ((atomic_read(&ndev
->state
) != NCI_DISCOVERY
) &&
676 (atomic_read(&ndev
->state
) != NCI_W4_ALL_DISCOVERIES
)) {
677 pr_err("unable to stop poll, since poll is not active\n");
681 nci_request(ndev
, nci_rf_deactivate_req
, NCI_DEACTIVATE_TYPE_IDLE_MODE
,
682 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT
));
685 static int nci_activate_target(struct nfc_dev
*nfc_dev
,
686 struct nfc_target
*target
, __u32 protocol
)
688 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
689 struct nci_rf_discover_select_param param
;
690 struct nfc_target
*nci_target
= NULL
;
694 pr_debug("target_idx %d, protocol 0x%x\n", target
->idx
, protocol
);
696 if ((atomic_read(&ndev
->state
) != NCI_W4_HOST_SELECT
) &&
697 (atomic_read(&ndev
->state
) != NCI_POLL_ACTIVE
)) {
698 pr_err("there is no available target to activate\n");
702 if (ndev
->target_active_prot
) {
703 pr_err("there is already an active target\n");
707 for (i
= 0; i
< ndev
->n_targets
; i
++) {
708 if (ndev
->targets
[i
].idx
== target
->idx
) {
709 nci_target
= &ndev
->targets
[i
];
715 pr_err("unable to find the selected target\n");
719 if (!(nci_target
->supported_protocols
& (1 << protocol
))) {
720 pr_err("target does not support the requested protocol 0x%x\n",
725 if (atomic_read(&ndev
->state
) == NCI_W4_HOST_SELECT
) {
726 param
.rf_discovery_id
= nci_target
->logical_idx
;
728 if (protocol
== NFC_PROTO_JEWEL
)
729 param
.rf_protocol
= NCI_RF_PROTOCOL_T1T
;
730 else if (protocol
== NFC_PROTO_MIFARE
)
731 param
.rf_protocol
= NCI_RF_PROTOCOL_T2T
;
732 else if (protocol
== NFC_PROTO_FELICA
)
733 param
.rf_protocol
= NCI_RF_PROTOCOL_T3T
;
734 else if (protocol
== NFC_PROTO_ISO14443
||
735 protocol
== NFC_PROTO_ISO14443_B
)
736 param
.rf_protocol
= NCI_RF_PROTOCOL_ISO_DEP
;
738 param
.rf_protocol
= NCI_RF_PROTOCOL_NFC_DEP
;
740 rc
= nci_request(ndev
, nci_rf_discover_select_req
,
741 (unsigned long)¶m
,
742 msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT
));
746 ndev
->target_active_prot
= protocol
;
751 static void nci_deactivate_target(struct nfc_dev
*nfc_dev
,
752 struct nfc_target
*target
)
754 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
758 if (!ndev
->target_active_prot
) {
759 pr_err("unable to deactivate target, no active target\n");
763 ndev
->target_active_prot
= 0;
765 if (atomic_read(&ndev
->state
) == NCI_POLL_ACTIVE
) {
766 nci_request(ndev
, nci_rf_deactivate_req
,
767 NCI_DEACTIVATE_TYPE_SLEEP_MODE
,
768 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT
));
772 static int nci_dep_link_up(struct nfc_dev
*nfc_dev
, struct nfc_target
*target
,
773 __u8 comm_mode
, __u8
*gb
, size_t gb_len
)
775 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
778 pr_debug("target_idx %d, comm_mode %d\n", target
->idx
, comm_mode
);
780 rc
= nci_activate_target(nfc_dev
, target
, NFC_PROTO_NFC_DEP
);
784 rc
= nfc_set_remote_general_bytes(nfc_dev
, ndev
->remote_gb
,
785 ndev
->remote_gb_len
);
787 rc
= nfc_dep_link_is_up(nfc_dev
, target
->idx
, NFC_COMM_PASSIVE
,
793 static int nci_dep_link_down(struct nfc_dev
*nfc_dev
)
795 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
800 if (nfc_dev
->rf_mode
== NFC_RF_INITIATOR
) {
801 nci_deactivate_target(nfc_dev
, NULL
);
803 if (atomic_read(&ndev
->state
) == NCI_LISTEN_ACTIVE
||
804 atomic_read(&ndev
->state
) == NCI_DISCOVERY
) {
805 nci_request(ndev
, nci_rf_deactivate_req
, 0,
806 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT
));
809 rc
= nfc_tm_deactivated(nfc_dev
);
811 pr_err("error when signaling tm deactivation\n");
818 static int nci_transceive(struct nfc_dev
*nfc_dev
, struct nfc_target
*target
,
820 data_exchange_cb_t cb
, void *cb_context
)
822 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
824 struct nci_conn_info
*conn_info
;
826 conn_info
= ndev
->rf_conn_info
;
830 pr_debug("target_idx %d, len %d\n", target
->idx
, skb
->len
);
832 if (!ndev
->target_active_prot
) {
833 pr_err("unable to exchange data, no active target\n");
837 if (test_and_set_bit(NCI_DATA_EXCHANGE
, &ndev
->flags
))
840 /* store cb and context to be used on receiving data */
841 conn_info
->data_exchange_cb
= cb
;
842 conn_info
->data_exchange_cb_context
= cb_context
;
844 rc
= nci_send_data(ndev
, NCI_STATIC_RF_CONN_ID
, skb
);
846 clear_bit(NCI_DATA_EXCHANGE
, &ndev
->flags
);
851 static int nci_tm_send(struct nfc_dev
*nfc_dev
, struct sk_buff
*skb
)
853 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
856 rc
= nci_send_data(ndev
, NCI_STATIC_RF_CONN_ID
, skb
);
858 pr_err("unable to send data\n");
863 static int nci_enable_se(struct nfc_dev
*nfc_dev
, u32 se_idx
)
865 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
867 if (ndev
->ops
->enable_se
)
868 return ndev
->ops
->enable_se(ndev
, se_idx
);
873 static int nci_disable_se(struct nfc_dev
*nfc_dev
, u32 se_idx
)
875 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
877 if (ndev
->ops
->disable_se
)
878 return ndev
->ops
->disable_se(ndev
, se_idx
);
883 static int nci_discover_se(struct nfc_dev
*nfc_dev
)
886 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
888 if (ndev
->ops
->discover_se
) {
889 r
= nci_nfcee_discover(ndev
, NCI_NFCEE_DISCOVERY_ACTION_ENABLE
);
890 if (r
!= NCI_STATUS_OK
)
893 return ndev
->ops
->discover_se(ndev
);
899 static int nci_se_io(struct nfc_dev
*nfc_dev
, u32 se_idx
,
900 u8
*apdu
, size_t apdu_length
,
901 se_io_cb_t cb
, void *cb_context
)
903 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
905 if (ndev
->ops
->se_io
)
906 return ndev
->ops
->se_io(ndev
, se_idx
, apdu
,
907 apdu_length
, cb
, cb_context
);
912 static int nci_fw_download(struct nfc_dev
*nfc_dev
, const char *firmware_name
)
914 struct nci_dev
*ndev
= nfc_get_drvdata(nfc_dev
);
916 if (!ndev
->ops
->fw_download
)
919 return ndev
->ops
->fw_download(ndev
, firmware_name
);
922 static struct nfc_ops nci_nfc_ops
= {
923 .dev_up
= nci_dev_up
,
924 .dev_down
= nci_dev_down
,
925 .start_poll
= nci_start_poll
,
926 .stop_poll
= nci_stop_poll
,
927 .dep_link_up
= nci_dep_link_up
,
928 .dep_link_down
= nci_dep_link_down
,
929 .activate_target
= nci_activate_target
,
930 .deactivate_target
= nci_deactivate_target
,
931 .im_transceive
= nci_transceive
,
932 .tm_send
= nci_tm_send
,
933 .enable_se
= nci_enable_se
,
934 .disable_se
= nci_disable_se
,
935 .discover_se
= nci_discover_se
,
937 .fw_download
= nci_fw_download
,
940 /* ---- Interface to NCI drivers ---- */
942 * nci_allocate_device - allocate a new nci device
944 * @ops: device operations
945 * @supported_protocols: NFC protocols supported by the device
947 struct nci_dev
*nci_allocate_device(struct nci_ops
*ops
,
948 __u32 supported_protocols
,
949 int tx_headroom
, int tx_tailroom
)
951 struct nci_dev
*ndev
;
953 pr_debug("supported_protocols 0x%x\n", supported_protocols
);
955 if (!ops
->open
|| !ops
->close
|| !ops
->send
)
958 if (!supported_protocols
)
961 ndev
= kzalloc(sizeof(struct nci_dev
), GFP_KERNEL
);
967 if (ops
->n_prop_ops
> NCI_MAX_PROPRIETARY_CMD
) {
968 pr_err("Too many proprietary commands: %zd\n",
970 ops
->prop_ops
= NULL
;
974 ndev
->tx_headroom
= tx_headroom
;
975 ndev
->tx_tailroom
= tx_tailroom
;
976 init_completion(&ndev
->req_completion
);
978 ndev
->nfc_dev
= nfc_allocate_device(&nci_nfc_ops
,
980 tx_headroom
+ NCI_DATA_HDR_SIZE
,
985 ndev
->hci_dev
= nci_hci_allocate(ndev
);
989 nfc_set_drvdata(ndev
->nfc_dev
, ndev
);
994 kfree(ndev
->nfc_dev
);
1000 EXPORT_SYMBOL(nci_allocate_device
);
1003 * nci_free_device - deallocate nci device
1005 * @ndev: The nci device to deallocate
1007 void nci_free_device(struct nci_dev
*ndev
)
1009 nfc_free_device(ndev
->nfc_dev
);
1012 EXPORT_SYMBOL(nci_free_device
);
1015 * nci_register_device - register a nci device in the nfc subsystem
1017 * @dev: The nci device to register
1019 int nci_register_device(struct nci_dev
*ndev
)
1022 struct device
*dev
= &ndev
->nfc_dev
->dev
;
1027 INIT_WORK(&ndev
->cmd_work
, nci_cmd_work
);
1028 snprintf(name
, sizeof(name
), "%s_nci_cmd_wq", dev_name(dev
));
1029 ndev
->cmd_wq
= create_singlethread_workqueue(name
);
1030 if (!ndev
->cmd_wq
) {
1035 INIT_WORK(&ndev
->rx_work
, nci_rx_work
);
1036 snprintf(name
, sizeof(name
), "%s_nci_rx_wq", dev_name(dev
));
1037 ndev
->rx_wq
= create_singlethread_workqueue(name
);
1040 goto destroy_cmd_wq_exit
;
1043 INIT_WORK(&ndev
->tx_work
, nci_tx_work
);
1044 snprintf(name
, sizeof(name
), "%s_nci_tx_wq", dev_name(dev
));
1045 ndev
->tx_wq
= create_singlethread_workqueue(name
);
1048 goto destroy_rx_wq_exit
;
1051 skb_queue_head_init(&ndev
->cmd_q
);
1052 skb_queue_head_init(&ndev
->rx_q
);
1053 skb_queue_head_init(&ndev
->tx_q
);
1055 setup_timer(&ndev
->cmd_timer
, nci_cmd_timer
,
1056 (unsigned long) ndev
);
1057 setup_timer(&ndev
->data_timer
, nci_data_timer
,
1058 (unsigned long) ndev
);
1060 mutex_init(&ndev
->req_lock
);
1061 INIT_LIST_HEAD(&ndev
->conn_info_list
);
1063 rc
= nfc_register_device(ndev
->nfc_dev
);
1065 goto destroy_rx_wq_exit
;
1070 destroy_workqueue(ndev
->rx_wq
);
1072 destroy_cmd_wq_exit
:
1073 destroy_workqueue(ndev
->cmd_wq
);
1078 EXPORT_SYMBOL(nci_register_device
);
1081 * nci_unregister_device - unregister a nci device in the nfc subsystem
1083 * @dev: The nci device to unregister
1085 void nci_unregister_device(struct nci_dev
*ndev
)
1087 struct nci_conn_info
*conn_info
, *n
;
1089 nci_close_device(ndev
);
1091 destroy_workqueue(ndev
->cmd_wq
);
1092 destroy_workqueue(ndev
->rx_wq
);
1093 destroy_workqueue(ndev
->tx_wq
);
1095 list_for_each_entry_safe(conn_info
, n
, &ndev
->conn_info_list
, list
) {
1096 list_del(&conn_info
->list
);
1097 /* conn_info is allocated with devm_kzalloc */
1100 nfc_unregister_device(ndev
->nfc_dev
);
1102 EXPORT_SYMBOL(nci_unregister_device
);
1105 * nci_recv_frame - receive frame from NCI drivers
1107 * @ndev: The nci device
1108 * @skb: The sk_buff to receive
1110 int nci_recv_frame(struct nci_dev
*ndev
, struct sk_buff
*skb
)
1112 pr_debug("len %d\n", skb
->len
);
1114 if (!ndev
|| (!test_bit(NCI_UP
, &ndev
->flags
) &&
1115 !test_bit(NCI_INIT
, &ndev
->flags
))) {
1120 /* Queue frame for rx worker thread */
1121 skb_queue_tail(&ndev
->rx_q
, skb
);
1122 queue_work(ndev
->rx_wq
, &ndev
->rx_work
);
1126 EXPORT_SYMBOL(nci_recv_frame
);
1128 static int nci_send_frame(struct nci_dev
*ndev
, struct sk_buff
*skb
)
1130 pr_debug("len %d\n", skb
->len
);
1137 /* Get rid of skb owner, prior to sending to the driver. */
1140 /* Send copy to sniffer */
1141 nfc_send_to_raw_sock(ndev
->nfc_dev
, skb
,
1142 RAW_PAYLOAD_NCI
, NFC_DIRECTION_TX
);
1144 return ndev
->ops
->send(ndev
, skb
);
1147 /* Send NCI command */
1148 int nci_send_cmd(struct nci_dev
*ndev
, __u16 opcode
, __u8 plen
, void *payload
)
1150 struct nci_ctrl_hdr
*hdr
;
1151 struct sk_buff
*skb
;
1153 pr_debug("opcode 0x%x, plen %d\n", opcode
, plen
);
1155 skb
= nci_skb_alloc(ndev
, (NCI_CTRL_HDR_SIZE
+ plen
), GFP_KERNEL
);
1157 pr_err("no memory for command\n");
1161 hdr
= (struct nci_ctrl_hdr
*) skb_put(skb
, NCI_CTRL_HDR_SIZE
);
1162 hdr
->gid
= nci_opcode_gid(opcode
);
1163 hdr
->oid
= nci_opcode_oid(opcode
);
1166 nci_mt_set((__u8
*)hdr
, NCI_MT_CMD_PKT
);
1167 nci_pbf_set((__u8
*)hdr
, NCI_PBF_LAST
);
1170 memcpy(skb_put(skb
, plen
), payload
, plen
);
1172 skb_queue_tail(&ndev
->cmd_q
, skb
);
1173 queue_work(ndev
->cmd_wq
, &ndev
->cmd_work
);
1178 /* Proprietary commands API */
1179 static struct nci_prop_ops
*prop_cmd_lookup(struct nci_dev
*ndev
,
1183 struct nci_prop_ops
*prop_op
;
1185 if (!ndev
->ops
->prop_ops
|| !ndev
->ops
->n_prop_ops
)
1188 for (i
= 0; i
< ndev
->ops
->n_prop_ops
; i
++) {
1189 prop_op
= &ndev
->ops
->prop_ops
[i
];
1190 if (prop_op
->opcode
== opcode
)
1197 int nci_prop_rsp_packet(struct nci_dev
*ndev
, __u16 rsp_opcode
,
1198 struct sk_buff
*skb
)
1200 struct nci_prop_ops
*prop_op
;
1202 prop_op
= prop_cmd_lookup(ndev
, rsp_opcode
);
1203 if (!prop_op
|| !prop_op
->rsp
)
1206 return prop_op
->rsp(ndev
, skb
);
1209 int nci_prop_ntf_packet(struct nci_dev
*ndev
, __u16 ntf_opcode
,
1210 struct sk_buff
*skb
)
1212 struct nci_prop_ops
*prop_op
;
1214 prop_op
= prop_cmd_lookup(ndev
, ntf_opcode
);
1215 if (!prop_op
|| !prop_op
->ntf
)
1218 return prop_op
->ntf(ndev
, skb
);
1221 /* ---- NCI TX Data worker thread ---- */
1223 static void nci_tx_work(struct work_struct
*work
)
1225 struct nci_dev
*ndev
= container_of(work
, struct nci_dev
, tx_work
);
1226 struct nci_conn_info
*conn_info
;
1227 struct sk_buff
*skb
;
1229 conn_info
= nci_get_conn_info_by_conn_id(ndev
, ndev
->cur_conn_id
);
1233 pr_debug("credits_cnt %d\n", atomic_read(&conn_info
->credits_cnt
));
1235 /* Send queued tx data */
1236 while (atomic_read(&conn_info
->credits_cnt
)) {
1237 skb
= skb_dequeue(&ndev
->tx_q
);
1241 /* Check if data flow control is used */
1242 if (atomic_read(&conn_info
->credits_cnt
) !=
1243 NCI_DATA_FLOW_CONTROL_NOT_USED
)
1244 atomic_dec(&conn_info
->credits_cnt
);
1246 pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n",
1248 nci_conn_id(skb
->data
),
1249 nci_plen(skb
->data
));
1251 nci_send_frame(ndev
, skb
);
1253 mod_timer(&ndev
->data_timer
,
1254 jiffies
+ msecs_to_jiffies(NCI_DATA_TIMEOUT
));
1258 /* ----- NCI RX worker thread (data & control) ----- */
1260 static void nci_rx_work(struct work_struct
*work
)
1262 struct nci_dev
*ndev
= container_of(work
, struct nci_dev
, rx_work
);
1263 struct sk_buff
*skb
;
1265 while ((skb
= skb_dequeue(&ndev
->rx_q
))) {
1267 /* Send copy to sniffer */
1268 nfc_send_to_raw_sock(ndev
->nfc_dev
, skb
,
1269 RAW_PAYLOAD_NCI
, NFC_DIRECTION_RX
);
1272 switch (nci_mt(skb
->data
)) {
1273 case NCI_MT_RSP_PKT
:
1274 nci_rsp_packet(ndev
, skb
);
1277 case NCI_MT_NTF_PKT
:
1278 nci_ntf_packet(ndev
, skb
);
1281 case NCI_MT_DATA_PKT
:
1282 nci_rx_data_packet(ndev
, skb
);
1286 pr_err("unknown MT 0x%x\n", nci_mt(skb
->data
));
1292 /* check if a data exchange timout has occurred */
1293 if (test_bit(NCI_DATA_EXCHANGE_TO
, &ndev
->flags
)) {
1294 /* complete the data exchange transaction, if exists */
1295 if (test_bit(NCI_DATA_EXCHANGE
, &ndev
->flags
))
1296 nci_data_exchange_complete(ndev
, NULL
,
1300 clear_bit(NCI_DATA_EXCHANGE_TO
, &ndev
->flags
);
1304 /* ----- NCI TX CMD worker thread ----- */
1306 static void nci_cmd_work(struct work_struct
*work
)
1308 struct nci_dev
*ndev
= container_of(work
, struct nci_dev
, cmd_work
);
1309 struct sk_buff
*skb
;
1311 pr_debug("cmd_cnt %d\n", atomic_read(&ndev
->cmd_cnt
));
1313 /* Send queued command */
1314 if (atomic_read(&ndev
->cmd_cnt
)) {
1315 skb
= skb_dequeue(&ndev
->cmd_q
);
1319 atomic_dec(&ndev
->cmd_cnt
);
1321 pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
1323 nci_opcode_gid(nci_opcode(skb
->data
)),
1324 nci_opcode_oid(nci_opcode(skb
->data
)),
1325 nci_plen(skb
->data
));
1327 nci_send_frame(ndev
, skb
);
1329 mod_timer(&ndev
->cmd_timer
,
1330 jiffies
+ msecs_to_jiffies(NCI_CMD_TIMEOUT
));
1334 MODULE_LICENSE("GPL");