blob: 074960154993fef5061cece1009b014c10668737 [file] [log] [blame]
Ilan Elias6a2968a2011-09-18 11:19:35 +03001/*
2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
4 *
5 * Copyright (C) 2011 Texas Instruments, Inc.
Julien Lefrique772dccf2014-10-21 16:52:44 +02006 * Copyright (C) 2014 Marvell International Ltd.
Ilan Elias6a2968a2011-09-18 11:19:35 +03007 *
8 * Written by Ilan Elias <ilane@ti.com>
9 *
10 * Acknowledgements:
11 * This file is based on hci_core.c, which was written
12 * by Maxim Krasnyansky.
13 *
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
17 *
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.
22 *
23 * You should have received a copy of the GNU General Public License
Jeff Kirsher98b32de2013-12-06 08:56:16 -080024 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Ilan Elias6a2968a2011-09-18 11:19:35 +030025 *
26 */
27
Samuel Ortiz52858b52011-12-14 16:43:05 +010028#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
Joe Perchesed1e0ad2011-11-29 11:37:32 -080029
Dave Jones8a70e7f2012-07-12 19:17:34 +020030#include <linux/module.h>
Samuel Ortizb6355e92015-06-06 13:16:37 +020031#include <linux/kernel.h>
Ilan Elias6a2968a2011-09-18 11:19:35 +030032#include <linux/types.h>
33#include <linux/workqueue.h>
34#include <linux/completion.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040035#include <linux/export.h>
Ilan Elias6a2968a2011-09-18 11:19:35 +030036#include <linux/sched.h>
37#include <linux/bitops.h>
38#include <linux/skbuff.h>
39
40#include "../nfc.h"
41#include <net/nfc/nci.h>
42#include <net/nfc/nci_core.h>
43#include <linux/nfc.h>
44
Christophe Ricardb16ae712015-02-03 19:48:05 +010045struct core_conn_create_data {
46 int length;
47 struct nci_core_conn_create_cmd *cmd;
48};
49
Ilan Elias6a2968a2011-09-18 11:19:35 +030050static void nci_cmd_work(struct work_struct *work);
51static void nci_rx_work(struct work_struct *work);
52static void nci_tx_work(struct work_struct *work);
53
Christophe Ricard4aeee6872015-02-01 22:26:08 +010054struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
55 int conn_id)
56{
57 struct nci_conn_info *conn_info;
58
59 list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
60 if (conn_info->conn_id == conn_id)
61 return conn_info;
62 }
63
64 return NULL;
65}
66
Christophe Ricard9b8d1a42016-04-30 09:12:51 +020067int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
68 struct dest_spec_params *params)
Robert Dolca85b9ce92015-10-22 12:11:41 +030069{
70 struct nci_conn_info *conn_info;
71
72 list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
Christophe Ricard9b8d1a42016-04-30 09:12:51 +020073 if (conn_info->dest_type == dest_type) {
74 if (!params)
75 return conn_info->conn_id;
Gustavo A. R. Silva03036182017-06-13 11:37:18 -050076
77 if (params->id == conn_info->dest_params->id &&
78 params->protocol == conn_info->dest_params->protocol)
79 return conn_info->conn_id;
Christophe Ricard9b8d1a42016-04-30 09:12:51 +020080 }
Robert Dolca85b9ce92015-10-22 12:11:41 +030081 }
82
83 return -EINVAL;
84}
Christophe Ricard9b8d1a42016-04-30 09:12:51 +020085EXPORT_SYMBOL(nci_get_conn_info_by_dest_type_params);
Robert Dolca85b9ce92015-10-22 12:11:41 +030086
Ilan Elias6a2968a2011-09-18 11:19:35 +030087/* ---- NCI requests ---- */
88
89void nci_req_complete(struct nci_dev *ndev, int result)
90{
91 if (ndev->req_status == NCI_REQ_PEND) {
92 ndev->req_result = result;
93 ndev->req_status = NCI_REQ_DONE;
94 complete(&ndev->req_completion);
95 }
96}
Samuel Ortiz2df7f8c2015-06-10 12:50:22 +020097EXPORT_SYMBOL(nci_req_complete);
Ilan Elias6a2968a2011-09-18 11:19:35 +030098
99static void nci_req_cancel(struct nci_dev *ndev, int err)
100{
101 if (ndev->req_status == NCI_REQ_PEND) {
102 ndev->req_result = err;
103 ndev->req_status = NCI_REQ_CANCELED;
104 complete(&ndev->req_completion);
105 }
106}
107
108/* Execute request and wait for completion. */
109static int __nci_request(struct nci_dev *ndev,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100110 void (*req)(struct nci_dev *ndev, unsigned long opt),
111 unsigned long opt, __u32 timeout)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300112{
113 int rc = 0;
Dan Carpenterf8c141c2011-12-09 09:35:39 +0300114 long completion_rc;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300115
116 ndev->req_status = NCI_REQ_PEND;
117
Axel Lin9bec44b2014-02-13 13:25:48 +0800118 reinit_completion(&ndev->req_completion);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300119 req(ndev, opt);
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100120 completion_rc =
121 wait_for_completion_interruptible_timeout(&ndev->req_completion,
122 timeout);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300123
Joe Perches20c239c2011-11-29 11:37:33 -0800124 pr_debug("wait_for_completion return %ld\n", completion_rc);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300125
126 if (completion_rc > 0) {
127 switch (ndev->req_status) {
128 case NCI_REQ_DONE:
129 rc = nci_to_errno(ndev->req_result);
130 break;
131
132 case NCI_REQ_CANCELED:
133 rc = -ndev->req_result;
134 break;
135
136 default:
137 rc = -ETIMEDOUT;
138 break;
139 }
140 } else {
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800141 pr_err("wait_for_completion_interruptible_timeout failed %ld\n",
142 completion_rc);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300143
144 rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc));
145 }
146
147 ndev->req_status = ndev->req_result = 0;
148
149 return rc;
150}
151
Christophe Ricard11f54f22015-02-01 22:26:14 +0100152inline int nci_request(struct nci_dev *ndev,
153 void (*req)(struct nci_dev *ndev,
154 unsigned long opt),
155 unsigned long opt, __u32 timeout)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300156{
157 int rc;
158
159 if (!test_bit(NCI_UP, &ndev->flags))
160 return -ENETDOWN;
161
162 /* Serialize all requests */
163 mutex_lock(&ndev->req_lock);
164 rc = __nci_request(ndev, req, opt, timeout);
165 mutex_unlock(&ndev->req_lock);
166
167 return rc;
168}
169
170static void nci_reset_req(struct nci_dev *ndev, unsigned long opt)
171{
Ilan Eliase8c0dac2011-11-09 12:09:14 +0200172 struct nci_core_reset_cmd cmd;
173
174 cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG;
175 nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300176}
177
178static void nci_init_req(struct nci_dev *ndev, unsigned long opt)
179{
180 nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, 0, NULL);
181}
182
183static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt)
184{
Ilan Elias2eb1dc12011-09-22 10:47:52 +0300185 struct nci_rf_disc_map_cmd cmd;
186 struct disc_map_config *cfg = cmd.mapping_configs;
187 __u8 *num = &cmd.num_mapping_configs;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300188 int i;
189
Ilan Elias6a2968a2011-09-18 11:19:35 +0300190 /* set rf mapping configurations */
Ilan Elias2eb1dc12011-09-22 10:47:52 +0300191 *num = 0;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300192
193 /* by default mapping is set to NCI_RF_INTERFACE_FRAME */
194 for (i = 0; i < ndev->num_supported_rf_interfaces; i++) {
195 if (ndev->supported_rf_interfaces[i] ==
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100196 NCI_RF_INTERFACE_ISO_DEP) {
Ilan Elias2eb1dc12011-09-22 10:47:52 +0300197 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
Ilan Elias637d85a2011-12-20 16:57:40 +0200198 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
199 NCI_DISC_MAP_MODE_LISTEN;
200 cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP;
Ilan Elias2eb1dc12011-09-22 10:47:52 +0300201 (*num)++;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300202 } else if (ndev->supported_rf_interfaces[i] ==
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100203 NCI_RF_INTERFACE_NFC_DEP) {
Ilan Elias2eb1dc12011-09-22 10:47:52 +0300204 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
Ilan Elias637d85a2011-12-20 16:57:40 +0200205 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
206 NCI_DISC_MAP_MODE_LISTEN;
207 cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP;
Ilan Elias2eb1dc12011-09-22 10:47:52 +0300208 (*num)++;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300209 }
210
Ilan Elias2eb1dc12011-09-22 10:47:52 +0300211 if (*num == NCI_MAX_NUM_MAPPING_CONFIGS)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300212 break;
213 }
214
215 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100216 (1 + ((*num) * sizeof(struct disc_map_config))), &cmd);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300217}
218
Ilan Elias7e035232012-08-15 11:46:22 +0300219struct nci_set_config_param {
220 __u8 id;
221 size_t len;
222 __u8 *val;
223};
224
225static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt)
226{
227 struct nci_set_config_param *param = (struct nci_set_config_param *)opt;
228 struct nci_core_set_config_cmd cmd;
229
230 BUG_ON(param->len > NCI_MAX_PARAM_LEN);
231
232 cmd.num_params = 1;
233 cmd.param.id = param->id;
234 cmd.param.len = param->len;
235 memcpy(cmd.param.val, param->val, param->len);
236
237 nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd);
238}
239
Julien Lefrique772dccf2014-10-21 16:52:44 +0200240struct nci_rf_discover_param {
241 __u32 im_protocols;
242 __u32 tm_protocols;
243};
244
Ilan Elias6a2968a2011-09-18 11:19:35 +0300245static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
246{
Julien Lefrique772dccf2014-10-21 16:52:44 +0200247 struct nci_rf_discover_param *param =
248 (struct nci_rf_discover_param *)opt;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300249 struct nci_rf_disc_cmd cmd;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300250
251 cmd.num_disc_configs = 0;
252
253 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
Julien Lefrique772dccf2014-10-21 16:52:44 +0200254 (param->im_protocols & NFC_PROTO_JEWEL_MASK ||
255 param->im_protocols & NFC_PROTO_MIFARE_MASK ||
256 param->im_protocols & NFC_PROTO_ISO14443_MASK ||
257 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
Ilan Elias637d85a2011-12-20 16:57:40 +0200258 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100259 NCI_NFC_A_PASSIVE_POLL_MODE;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300260 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
261 cmd.num_disc_configs++;
262 }
263
264 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
Julien Lefrique772dccf2014-10-21 16:52:44 +0200265 (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) {
Ilan Elias637d85a2011-12-20 16:57:40 +0200266 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100267 NCI_NFC_B_PASSIVE_POLL_MODE;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300268 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
269 cmd.num_disc_configs++;
270 }
271
272 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
Julien Lefrique772dccf2014-10-21 16:52:44 +0200273 (param->im_protocols & NFC_PROTO_FELICA_MASK ||
274 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
Ilan Elias637d85a2011-12-20 16:57:40 +0200275 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100276 NCI_NFC_F_PASSIVE_POLL_MODE;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300277 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
278 cmd.num_disc_configs++;
279 }
280
Vincent Cuissardcfdbeea2014-07-22 19:48:38 +0200281 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
Julien Lefrique772dccf2014-10-21 16:52:44 +0200282 (param->im_protocols & NFC_PROTO_ISO15693_MASK)) {
Vincent Cuissardcfdbeea2014-07-22 19:48:38 +0200283 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
284 NCI_NFC_V_PASSIVE_POLL_MODE;
285 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
286 cmd.num_disc_configs++;
287 }
288
Julien Lefrique772dccf2014-10-21 16:52:44 +0200289 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) &&
290 (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) {
291 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
292 NCI_NFC_A_PASSIVE_LISTEN_MODE;
293 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
294 cmd.num_disc_configs++;
295 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
296 NCI_NFC_F_PASSIVE_LISTEN_MODE;
297 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
298 cmd.num_disc_configs++;
299 }
300
Ilan Elias6a2968a2011-09-18 11:19:35 +0300301 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100302 (1 + (cmd.num_disc_configs * sizeof(struct disc_config))),
303 &cmd);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300304}
305
Ilan Elias019c4fb2012-01-18 13:16:14 +0200306struct nci_rf_discover_select_param {
307 __u8 rf_discovery_id;
308 __u8 rf_protocol;
309};
310
311static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt)
312{
313 struct nci_rf_discover_select_param *param =
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100314 (struct nci_rf_discover_select_param *)opt;
Ilan Elias019c4fb2012-01-18 13:16:14 +0200315 struct nci_rf_discover_select_cmd cmd;
316
317 cmd.rf_discovery_id = param->rf_discovery_id;
318 cmd.rf_protocol = param->rf_protocol;
319
320 switch (cmd.rf_protocol) {
321 case NCI_RF_PROTOCOL_ISO_DEP:
322 cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP;
323 break;
324
325 case NCI_RF_PROTOCOL_NFC_DEP:
326 cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP;
327 break;
328
329 default:
330 cmd.rf_interface = NCI_RF_INTERFACE_FRAME;
331 break;
332 }
333
334 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100335 sizeof(struct nci_rf_discover_select_cmd), &cmd);
Ilan Elias019c4fb2012-01-18 13:16:14 +0200336}
337
Ilan Elias6a2968a2011-09-18 11:19:35 +0300338static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt)
339{
340 struct nci_rf_deactivate_cmd cmd;
341
Christophe Ricard9295b5b2014-12-02 21:27:49 +0100342 cmd.type = opt;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300343
344 nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100345 sizeof(struct nci_rf_deactivate_cmd), &cmd);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300346}
347
Robert Dolca7bc48242015-10-22 12:11:37 +0300348struct nci_cmd_param {
Christophe Ricard759afb82015-06-06 13:16:41 +0200349 __u16 opcode;
350 size_t len;
351 __u8 *payload;
352};
353
Robert Dolca7bc48242015-10-22 12:11:37 +0300354static void nci_generic_req(struct nci_dev *ndev, unsigned long opt)
Christophe Ricard759afb82015-06-06 13:16:41 +0200355{
Robert Dolca7bc48242015-10-22 12:11:37 +0300356 struct nci_cmd_param *param =
357 (struct nci_cmd_param *)opt;
Christophe Ricard759afb82015-06-06 13:16:41 +0200358
359 nci_send_cmd(ndev, param->opcode, param->len, param->payload);
360}
361
362int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload)
363{
Robert Dolca7bc48242015-10-22 12:11:37 +0300364 struct nci_cmd_param param;
Christophe Ricard759afb82015-06-06 13:16:41 +0200365
366 param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid);
367 param.len = len;
368 param.payload = payload;
369
Robert Dolca7bc48242015-10-22 12:11:37 +0300370 return __nci_request(ndev, nci_generic_req, (unsigned long)&param,
Christophe Ricard759afb82015-06-06 13:16:41 +0200371 msecs_to_jiffies(NCI_CMD_TIMEOUT));
372}
373EXPORT_SYMBOL(nci_prop_cmd);
374
Robert Dolca7bc48242015-10-22 12:11:37 +0300375int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload)
376{
377 struct nci_cmd_param param;
378
379 param.opcode = opcode;
380 param.len = len;
381 param.payload = payload;
382
383 return __nci_request(ndev, nci_generic_req, (unsigned long)&param,
384 msecs_to_jiffies(NCI_CMD_TIMEOUT));
385}
386EXPORT_SYMBOL(nci_core_cmd);
387
Robert Baldyga025a0cb2015-08-20 17:26:01 +0200388int nci_core_reset(struct nci_dev *ndev)
389{
390 return __nci_request(ndev, nci_reset_req, 0,
391 msecs_to_jiffies(NCI_RESET_TIMEOUT));
392}
393EXPORT_SYMBOL(nci_core_reset);
394
395int nci_core_init(struct nci_dev *ndev)
396{
397 return __nci_request(ndev, nci_init_req, 0,
398 msecs_to_jiffies(NCI_INIT_TIMEOUT));
399}
400EXPORT_SYMBOL(nci_core_init);
401
Christophe Ricard1c538552016-04-30 09:12:52 +0200402struct nci_loopback_data {
403 u8 conn_id;
404 struct sk_buff *data;
405};
406
407static void nci_send_data_req(struct nci_dev *ndev, unsigned long opt)
408{
409 struct nci_loopback_data *data = (struct nci_loopback_data *)opt;
410
411 nci_send_data(ndev, data->conn_id, data->data);
412}
413
414static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err)
415{
416 struct nci_dev *ndev = (struct nci_dev *)context;
417 struct nci_conn_info *conn_info;
418
419 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
420 if (!conn_info) {
421 nci_req_complete(ndev, NCI_STATUS_REJECTED);
422 return;
423 }
424
425 conn_info->rx_skb = skb;
426
427 nci_req_complete(ndev, NCI_STATUS_OK);
428}
429
430int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
431 struct sk_buff **resp)
432{
433 int r;
434 struct nci_loopback_data loopback_data;
435 struct nci_conn_info *conn_info;
436 struct sk_buff *skb;
437 int conn_id = nci_get_conn_info_by_dest_type_params(ndev,
438 NCI_DESTINATION_NFCC_LOOPBACK, NULL);
439
440 if (conn_id < 0) {
441 r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK,
442 0, 0, NULL);
443 if (r != NCI_STATUS_OK)
444 return r;
445
446 conn_id = nci_get_conn_info_by_dest_type_params(ndev,
447 NCI_DESTINATION_NFCC_LOOPBACK,
448 NULL);
449 }
450
451 conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
452 if (!conn_info)
453 return -EPROTO;
454
455 /* store cb and context to be used on receiving data */
456 conn_info->data_exchange_cb = nci_nfcc_loopback_cb;
457 conn_info->data_exchange_cb_context = ndev;
458
459 skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL);
460 if (!skb)
461 return -ENOMEM;
462
463 skb_reserve(skb, NCI_DATA_HDR_SIZE);
Johannes Berg59ae1d12017-06-16 14:29:20 +0200464 skb_put_data(skb, data, data_len);
Christophe Ricard1c538552016-04-30 09:12:52 +0200465
466 loopback_data.conn_id = conn_id;
467 loopback_data.data = skb;
468
469 ndev->cur_conn_id = conn_id;
470 r = nci_request(ndev, nci_send_data_req, (unsigned long)&loopback_data,
471 msecs_to_jiffies(NCI_DATA_TIMEOUT));
472 if (r == NCI_STATUS_OK && resp)
473 *resp = conn_info->rx_skb;
474
475 return r;
476}
477EXPORT_SYMBOL(nci_nfcc_loopback);
478
Ilan Elias6a2968a2011-09-18 11:19:35 +0300479static int nci_open_device(struct nci_dev *ndev)
480{
481 int rc = 0;
482
483 mutex_lock(&ndev->req_lock);
484
485 if (test_bit(NCI_UP, &ndev->flags)) {
486 rc = -EALREADY;
487 goto done;
488 }
489
490 if (ndev->ops->open(ndev)) {
491 rc = -EIO;
492 goto done;
493 }
494
495 atomic_set(&ndev->cmd_cnt, 1);
496
497 set_bit(NCI_INIT, &ndev->flags);
498
Christophe Ricardc39daee2015-06-06 13:16:40 +0200499 if (ndev->ops->init)
500 rc = ndev->ops->init(ndev);
501
502 if (!rc) {
503 rc = __nci_request(ndev, nci_reset_req, 0,
504 msecs_to_jiffies(NCI_RESET_TIMEOUT));
505 }
Ilan Elias6a2968a2011-09-18 11:19:35 +0300506
Christophe Ricard81859ab2015-06-06 13:16:39 +0200507 if (!rc && ndev->ops->setup) {
508 rc = ndev->ops->setup(ndev);
509 }
Amitkumar Karwar86e85862014-01-06 12:58:17 -0800510
Ilan Elias6a2968a2011-09-18 11:19:35 +0300511 if (!rc) {
512 rc = __nci_request(ndev, nci_init_req, 0,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100513 msecs_to_jiffies(NCI_INIT_TIMEOUT));
Ilan Elias6a2968a2011-09-18 11:19:35 +0300514 }
515
Robert Dolcae4dbd622015-10-22 12:11:36 +0300516 if (!rc && ndev->ops->post_setup)
Robert Baldygafdf79bd2015-08-20 17:26:00 +0200517 rc = ndev->ops->post_setup(ndev);
Robert Baldygafdf79bd2015-08-20 17:26:00 +0200518
Ilan Elias6a2968a2011-09-18 11:19:35 +0300519 if (!rc) {
520 rc = __nci_request(ndev, nci_init_complete_req, 0,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100521 msecs_to_jiffies(NCI_INIT_TIMEOUT));
Ilan Elias6a2968a2011-09-18 11:19:35 +0300522 }
523
524 clear_bit(NCI_INIT, &ndev->flags);
525
526 if (!rc) {
527 set_bit(NCI_UP, &ndev->flags);
Ilan Elias019c4fb2012-01-18 13:16:14 +0200528 nci_clear_target_list(ndev);
Ilan Elias8939e472012-01-18 13:16:12 +0200529 atomic_set(&ndev->state, NCI_IDLE);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300530 } else {
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);
535
536 ndev->ops->close(ndev);
537 ndev->flags = 0;
538 }
539
540done:
541 mutex_unlock(&ndev->req_lock);
542 return rc;
543}
544
545static int nci_close_device(struct nci_dev *ndev)
546{
547 nci_req_cancel(ndev, ENODEV);
548 mutex_lock(&ndev->req_lock);
549
550 if (!test_and_clear_bit(NCI_UP, &ndev->flags)) {
551 del_timer_sync(&ndev->cmd_timer);
Ilan Eliasc4bf98b2012-01-17 12:03:50 +0200552 del_timer_sync(&ndev->data_timer);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300553 mutex_unlock(&ndev->req_lock);
554 return 0;
555 }
556
557 /* Drop RX and TX queues */
558 skb_queue_purge(&ndev->rx_q);
559 skb_queue_purge(&ndev->tx_q);
560
561 /* Flush RX and TX wq */
562 flush_workqueue(ndev->rx_wq);
563 flush_workqueue(ndev->tx_wq);
564
565 /* Reset device */
566 skb_queue_purge(&ndev->cmd_q);
567 atomic_set(&ndev->cmd_cnt, 1);
568
569 set_bit(NCI_INIT, &ndev->flags);
570 __nci_request(ndev, nci_reset_req, 0,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100571 msecs_to_jiffies(NCI_RESET_TIMEOUT));
Christophe Ricard0e70cba72015-06-06 13:16:48 +0200572
573 /* After this point our queues are empty
574 * and no works are scheduled.
575 */
576 ndev->ops->close(ndev);
577
Ilan Elias6a2968a2011-09-18 11:19:35 +0300578 clear_bit(NCI_INIT, &ndev->flags);
579
Amitkumar Karwarfa9be5f2013-12-23 14:15:13 -0800580 del_timer_sync(&ndev->cmd_timer);
581
Ilan Elias6a2968a2011-09-18 11:19:35 +0300582 /* Flush cmd wq */
583 flush_workqueue(ndev->cmd_wq);
584
Ilan Elias6a2968a2011-09-18 11:19:35 +0300585 /* Clear flags */
586 ndev->flags = 0;
587
588 mutex_unlock(&ndev->req_lock);
589
590 return 0;
591}
592
593/* NCI command timer function */
Kees Cooke99e88a2017-10-16 14:43:17 -0700594static void nci_cmd_timer(struct timer_list *t)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300595{
Kees Cooke99e88a2017-10-16 14:43:17 -0700596 struct nci_dev *ndev = from_timer(ndev, t, cmd_timer);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300597
Ilan Elias6a2968a2011-09-18 11:19:35 +0300598 atomic_set(&ndev->cmd_cnt, 1);
599 queue_work(ndev->cmd_wq, &ndev->cmd_work);
600}
601
Ilan Eliasc4bf98b2012-01-17 12:03:50 +0200602/* NCI data exchange timer function */
Kees Cooke99e88a2017-10-16 14:43:17 -0700603static void nci_data_timer(struct timer_list *t)
Ilan Eliasc4bf98b2012-01-17 12:03:50 +0200604{
Kees Cooke99e88a2017-10-16 14:43:17 -0700605 struct nci_dev *ndev = from_timer(ndev, t, data_timer);
Ilan Eliasc4bf98b2012-01-17 12:03:50 +0200606
607 set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
608 queue_work(ndev->rx_wq, &ndev->rx_work);
609}
610
Ilan Elias6a2968a2011-09-18 11:19:35 +0300611static int nci_dev_up(struct nfc_dev *nfc_dev)
612{
613 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
614
Ilan Elias6a2968a2011-09-18 11:19:35 +0300615 return nci_open_device(ndev);
616}
617
618static int nci_dev_down(struct nfc_dev *nfc_dev)
619{
620 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
621
Ilan Elias6a2968a2011-09-18 11:19:35 +0300622 return nci_close_device(ndev);
623}
624
Amitkumar Karwar22c15bf2014-01-06 12:58:18 -0800625int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val)
626{
627 struct nci_set_config_param param;
628
629 if (!val || !len)
630 return 0;
631
632 param.id = id;
633 param.len = len;
634 param.val = val;
635
636 return __nci_request(ndev, nci_set_config_req, (unsigned long)&param,
637 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
638}
639EXPORT_SYMBOL(nci_set_config);
640
Christophe Ricardaf9c8aa2015-02-01 22:26:10 +0100641static void nci_nfcee_discover_req(struct nci_dev *ndev, unsigned long opt)
642{
643 struct nci_nfcee_discover_cmd cmd;
644 __u8 action = opt;
645
646 cmd.discovery_action = action;
647
648 nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd);
649}
650
651int nci_nfcee_discover(struct nci_dev *ndev, u8 action)
652{
Samuel Ortiz21d19f82015-10-03 05:02:28 +0200653 return __nci_request(ndev, nci_nfcee_discover_req, action,
Christophe Ricardaf9c8aa2015-02-01 22:26:10 +0100654 msecs_to_jiffies(NCI_CMD_TIMEOUT));
655}
656EXPORT_SYMBOL(nci_nfcee_discover);
657
Christophe Ricardf7f793f2015-02-01 22:26:11 +0100658static void nci_nfcee_mode_set_req(struct nci_dev *ndev, unsigned long opt)
659{
660 struct nci_nfcee_mode_set_cmd *cmd =
661 (struct nci_nfcee_mode_set_cmd *)opt;
662
663 nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD,
664 sizeof(struct nci_nfcee_mode_set_cmd), cmd);
665}
666
667int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode)
668{
669 struct nci_nfcee_mode_set_cmd cmd;
670
671 cmd.nfcee_id = nfcee_id;
672 cmd.nfcee_mode = nfcee_mode;
673
Samuel Ortiz21d19f82015-10-03 05:02:28 +0200674 return __nci_request(ndev, nci_nfcee_mode_set_req,
675 (unsigned long)&cmd,
676 msecs_to_jiffies(NCI_CMD_TIMEOUT));
Christophe Ricardf7f793f2015-02-01 22:26:11 +0100677}
678EXPORT_SYMBOL(nci_nfcee_mode_set);
679
Christophe Ricard736bb952015-02-01 22:26:12 +0100680static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt)
681{
Christophe Ricardb16ae712015-02-03 19:48:05 +0100682 struct core_conn_create_data *data =
683 (struct core_conn_create_data *)opt;
Christophe Ricard736bb952015-02-01 22:26:12 +0100684
Christophe Ricardb16ae712015-02-03 19:48:05 +0100685 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd);
Christophe Ricard736bb952015-02-01 22:26:12 +0100686}
687
Christophe Ricardb16ae712015-02-03 19:48:05 +0100688int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
689 u8 number_destination_params,
690 size_t params_len,
Christophe Ricard736bb952015-02-01 22:26:12 +0100691 struct core_conn_create_dest_spec_params *params)
692{
Christophe Ricardb16ae712015-02-03 19:48:05 +0100693 int r;
694 struct nci_core_conn_create_cmd *cmd;
695 struct core_conn_create_data data;
696
697 data.length = params_len + sizeof(struct nci_core_conn_create_cmd);
698 cmd = kzalloc(data.length, GFP_KERNEL);
699 if (!cmd)
700 return -ENOMEM;
701
702 cmd->destination_type = destination_type;
703 cmd->number_destination_params = number_destination_params;
Christophe Ricardb16ae712015-02-03 19:48:05 +0100704
705 data.cmd = cmd;
Robert Dolcacaa575a82015-10-22 12:11:40 +0300706
Christophe Ricard18836022016-04-30 09:12:49 +0200707 if (params) {
708 memcpy(cmd->params, params, params_len);
709 if (params->length > 0)
Christophe Ricard9b8d1a42016-04-30 09:12:51 +0200710 memcpy(&ndev->cur_params,
711 &params->value[DEST_SPEC_PARAMS_ID_INDEX],
712 sizeof(struct dest_spec_params));
Christophe Ricard18836022016-04-30 09:12:49 +0200713 else
Christophe Ricard9b8d1a42016-04-30 09:12:51 +0200714 ndev->cur_params.id = 0;
Christophe Ricard18836022016-04-30 09:12:49 +0200715 } else {
Christophe Ricard9b8d1a42016-04-30 09:12:51 +0200716 ndev->cur_params.id = 0;
Christophe Ricard18836022016-04-30 09:12:49 +0200717 }
Christophe Ricard9b8d1a42016-04-30 09:12:51 +0200718 ndev->cur_dest_type = destination_type;
Christophe Ricardb16ae712015-02-03 19:48:05 +0100719
Christophe Ricard18836022016-04-30 09:12:49 +0200720 r = __nci_request(ndev, nci_core_conn_create_req, (unsigned long)&data,
Christophe Ricardb16ae712015-02-03 19:48:05 +0100721 msecs_to_jiffies(NCI_CMD_TIMEOUT));
722 kfree(cmd);
723 return r;
Christophe Ricard736bb952015-02-01 22:26:12 +0100724}
725EXPORT_SYMBOL(nci_core_conn_create);
726
727static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt)
728{
729 __u8 conn_id = opt;
730
731 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id);
732}
733
734int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id)
735{
Christophe Ricardde5ea852016-04-30 09:12:50 +0200736 ndev->cur_conn_id = conn_id;
Samuel Ortiz21d19f82015-10-03 05:02:28 +0200737 return __nci_request(ndev, nci_core_conn_close_req, conn_id,
738 msecs_to_jiffies(NCI_CMD_TIMEOUT));
Christophe Ricard736bb952015-02-01 22:26:12 +0100739}
740EXPORT_SYMBOL(nci_core_conn_close);
741
Ilan Elias7e035232012-08-15 11:46:22 +0300742static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
743{
744 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
745 struct nci_set_config_param param;
Julien Lefrique529ee062014-10-21 16:52:47 +0200746 int rc;
Ilan Elias7e035232012-08-15 11:46:22 +0300747
748 param.val = nfc_get_local_general_bytes(nfc_dev, &param.len);
749 if ((param.val == NULL) || (param.len == 0))
Szymon Jancf9fc36f2012-10-04 15:15:46 +0200750 return 0;
Ilan Elias7e035232012-08-15 11:46:22 +0300751
Szymon Janc460d8f92012-10-04 15:15:45 +0200752 if (param.len > NFC_MAX_GT_LEN)
Ilan Elias7e035232012-08-15 11:46:22 +0300753 return -EINVAL;
754
Ilan Elias7e035232012-08-15 11:46:22 +0300755 param.id = NCI_PN_ATR_REQ_GEN_BYTES;
Ilan Elias7e035232012-08-15 11:46:22 +0300756
Julien Lefrique529ee062014-10-21 16:52:47 +0200757 rc = nci_request(ndev, nci_set_config_req, (unsigned long)&param,
758 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
759 if (rc)
760 return rc;
761
762 param.id = NCI_LN_ATR_RES_GEN_BYTES;
763
Szymon Jancf9fc36f2012-10-04 15:15:46 +0200764 return nci_request(ndev, nci_set_config_req, (unsigned long)&param,
765 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
Ilan Elias7e035232012-08-15 11:46:22 +0300766}
767
Julien Lefrique90d78c12014-10-21 16:52:45 +0200768static int nci_set_listen_parameters(struct nfc_dev *nfc_dev)
769{
770 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
771 int rc;
772 __u8 val;
773
774 val = NCI_LA_SEL_INFO_NFC_DEP_MASK;
775
776 rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val);
777 if (rc)
778 return rc;
779
780 val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK;
781
782 rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val);
783 if (rc)
784 return rc;
785
786 val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424;
787
788 return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val);
789}
790
Samuel Ortizfe7c5802012-05-15 15:57:06 +0200791static int nci_start_poll(struct nfc_dev *nfc_dev,
792 __u32 im_protocols, __u32 tm_protocols)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300793{
794 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
Julien Lefrique772dccf2014-10-21 16:52:44 +0200795 struct nci_rf_discover_param param;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300796 int rc;
797
Ilan Elias019c4fb2012-01-18 13:16:14 +0200798 if ((atomic_read(&ndev->state) == NCI_DISCOVERY) ||
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100799 (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800800 pr_err("unable to start poll, since poll is already active\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +0300801 return -EBUSY;
802 }
803
Ilan Eliasde054792011-09-22 11:13:01 +0300804 if (ndev->target_active_prot) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800805 pr_err("there is an active target\n");
Ilan Eliasde054792011-09-22 11:13:01 +0300806 return -EBUSY;
807 }
808
Ilan Elias019c4fb2012-01-18 13:16:14 +0200809 if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) ||
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100810 (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) {
Ilan Elias019c4fb2012-01-18 13:16:14 +0200811 pr_debug("target active or w4 select, implicitly deactivate\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +0300812
Christophe Ricard9295b5b2014-12-02 21:27:49 +0100813 rc = nci_request(ndev, nci_rf_deactivate_req,
814 NCI_DEACTIVATE_TYPE_IDLE_MODE,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100815 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
Ilan Elias6a2968a2011-09-18 11:19:35 +0300816 if (rc)
817 return -EBUSY;
818 }
819
Julien Lefrique529ee062014-10-21 16:52:47 +0200820 if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
Ilan Elias7e035232012-08-15 11:46:22 +0300821 rc = nci_set_local_general_bytes(nfc_dev);
822 if (rc) {
823 pr_err("failed to set local general bytes\n");
824 return rc;
825 }
826 }
827
Julien Lefrique90d78c12014-10-21 16:52:45 +0200828 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
829 rc = nci_set_listen_parameters(nfc_dev);
830 if (rc)
831 pr_err("failed to set listen parameters\n");
832 }
833
Julien Lefrique772dccf2014-10-21 16:52:44 +0200834 param.im_protocols = im_protocols;
835 param.tm_protocols = tm_protocols;
836 rc = nci_request(ndev, nci_rf_discover_req, (unsigned long)&param,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100837 msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
Ilan Elias6a2968a2011-09-18 11:19:35 +0300838
839 if (!rc)
Samuel Ortizfe7c5802012-05-15 15:57:06 +0200840 ndev->poll_prots = im_protocols;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300841
842 return rc;
843}
844
845static void nci_stop_poll(struct nfc_dev *nfc_dev)
846{
847 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
848
Ilan Elias019c4fb2012-01-18 13:16:14 +0200849 if ((atomic_read(&ndev->state) != NCI_DISCOVERY) &&
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100850 (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800851 pr_err("unable to stop poll, since poll is not active\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +0300852 return;
853 }
854
Christophe Ricard9295b5b2014-12-02 21:27:49 +0100855 nci_request(ndev, nci_rf_deactivate_req, NCI_DEACTIVATE_TYPE_IDLE_MODE,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100856 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
Ilan Elias6a2968a2011-09-18 11:19:35 +0300857}
858
Eric Lapuyade90099432012-05-07 12:31:13 +0200859static int nci_activate_target(struct nfc_dev *nfc_dev,
860 struct nfc_target *target, __u32 protocol)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300861{
862 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
Ilan Elias019c4fb2012-01-18 13:16:14 +0200863 struct nci_rf_discover_select_param param;
Eric Lapuyade90099432012-05-07 12:31:13 +0200864 struct nfc_target *nci_target = NULL;
Ilan Elias019c4fb2012-01-18 13:16:14 +0200865 int i;
866 int rc = 0;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300867
Eric Lapuyade90099432012-05-07 12:31:13 +0200868 pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300869
Ilan Elias019c4fb2012-01-18 13:16:14 +0200870 if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) &&
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100871 (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800872 pr_err("there is no available target to activate\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +0300873 return -EINVAL;
874 }
875
876 if (ndev->target_active_prot) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800877 pr_err("there is already an active target\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +0300878 return -EBUSY;
879 }
880
Ilan Elias019c4fb2012-01-18 13:16:14 +0200881 for (i = 0; i < ndev->n_targets; i++) {
Eric Lapuyade90099432012-05-07 12:31:13 +0200882 if (ndev->targets[i].idx == target->idx) {
883 nci_target = &ndev->targets[i];
Ilan Elias019c4fb2012-01-18 13:16:14 +0200884 break;
885 }
886 }
887
Eric Lapuyade90099432012-05-07 12:31:13 +0200888 if (!nci_target) {
Ilan Elias019c4fb2012-01-18 13:16:14 +0200889 pr_err("unable to find the selected target\n");
890 return -EINVAL;
891 }
892
Eric Lapuyade90099432012-05-07 12:31:13 +0200893 if (!(nci_target->supported_protocols & (1 << protocol))) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800894 pr_err("target does not support the requested protocol 0x%x\n",
895 protocol);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300896 return -EINVAL;
897 }
898
Ilan Elias019c4fb2012-01-18 13:16:14 +0200899 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
Eric Lapuyade90099432012-05-07 12:31:13 +0200900 param.rf_discovery_id = nci_target->logical_idx;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300901
Ilan Elias019c4fb2012-01-18 13:16:14 +0200902 if (protocol == NFC_PROTO_JEWEL)
903 param.rf_protocol = NCI_RF_PROTOCOL_T1T;
904 else if (protocol == NFC_PROTO_MIFARE)
905 param.rf_protocol = NCI_RF_PROTOCOL_T2T;
906 else if (protocol == NFC_PROTO_FELICA)
907 param.rf_protocol = NCI_RF_PROTOCOL_T3T;
Samuel Ortiz01d719a2012-07-04 00:14:04 +0200908 else if (protocol == NFC_PROTO_ISO14443 ||
909 protocol == NFC_PROTO_ISO14443_B)
Ilan Elias019c4fb2012-01-18 13:16:14 +0200910 param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
911 else
912 param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
913
914 rc = nci_request(ndev, nci_rf_discover_select_req,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100915 (unsigned long)&param,
916 msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT));
Ilan Elias019c4fb2012-01-18 13:16:14 +0200917 }
918
919 if (!rc)
920 ndev->target_active_prot = protocol;
921
922 return rc;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300923}
924
Eric Lapuyade90099432012-05-07 12:31:13 +0200925static void nci_deactivate_target(struct nfc_dev *nfc_dev,
Christophe Ricard96d45812015-10-25 22:54:43 +0100926 struct nfc_target *target,
927 __u8 mode)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300928{
929 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
Christophe Ricard96d45812015-10-25 22:54:43 +0100930 u8 nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300931
Ilan Elias767f19a2012-08-15 11:46:24 +0300932 pr_debug("entry\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +0300933
934 if (!ndev->target_active_prot) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800935 pr_err("unable to deactivate target, no active target\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +0300936 return;
937 }
938
939 ndev->target_active_prot = 0;
940
Christophe Ricard96d45812015-10-25 22:54:43 +0100941 switch (mode) {
942 case NFC_TARGET_MODE_SLEEP:
943 nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE;
944 break;
945 }
946
Ilan Elias8939e472012-01-18 13:16:12 +0200947 if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
Christophe Ricard96d45812015-10-25 22:54:43 +0100948 nci_request(ndev, nci_rf_deactivate_req, nci_mode,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100949 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
Ilan Elias6a2968a2011-09-18 11:19:35 +0300950 }
951}
952
Ilan Elias767f19a2012-08-15 11:46:24 +0300953static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
954 __u8 comm_mode, __u8 *gb, size_t gb_len)
955{
956 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
957 int rc;
958
959 pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
960
961 rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
962 if (rc)
963 return rc;
964
965 rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
966 ndev->remote_gb_len);
967 if (!rc)
968 rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
969 NFC_RF_INITIATOR);
970
971 return rc;
972}
973
974static int nci_dep_link_down(struct nfc_dev *nfc_dev)
975{
Julien Lefriqued7979e12014-10-21 16:52:53 +0200976 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
977 int rc;
978
Ilan Elias767f19a2012-08-15 11:46:24 +0300979 pr_debug("entry\n");
980
Julien Lefriqued7979e12014-10-21 16:52:53 +0200981 if (nfc_dev->rf_mode == NFC_RF_INITIATOR) {
Christophe Ricard96d45812015-10-25 22:54:43 +0100982 nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE);
Julien Lefriqued7979e12014-10-21 16:52:53 +0200983 } else {
984 if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE ||
985 atomic_read(&ndev->state) == NCI_DISCOVERY) {
986 nci_request(ndev, nci_rf_deactivate_req, 0,
987 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
988 }
989
990 rc = nfc_tm_deactivated(nfc_dev);
991 if (rc)
992 pr_err("error when signaling tm deactivation\n");
993 }
Ilan Elias767f19a2012-08-15 11:46:24 +0300994
995 return 0;
996}
997
998
Samuel Ortizbe9ae4c2012-05-16 15:55:48 +0200999static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
1000 struct sk_buff *skb,
1001 data_exchange_cb_t cb, void *cb_context)
Ilan Elias6a2968a2011-09-18 11:19:35 +03001002{
1003 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
Ilan Elias38f04c62011-09-22 11:36:19 +03001004 int rc;
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001005 struct nci_conn_info *conn_info;
1006
Christophe Ricard12bdf272015-02-03 19:48:04 +01001007 conn_info = ndev->rf_conn_info;
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001008 if (!conn_info)
1009 return -EPROTO;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001010
Eric Lapuyade90099432012-05-07 12:31:13 +02001011 pr_debug("target_idx %d, len %d\n", target->idx, skb->len);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001012
1013 if (!ndev->target_active_prot) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -08001014 pr_err("unable to exchange data, no active target\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +03001015 return -EINVAL;
1016 }
1017
Ilan Elias38f04c62011-09-22 11:36:19 +03001018 if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1019 return -EBUSY;
1020
Ilan Elias6a2968a2011-09-18 11:19:35 +03001021 /* store cb and context to be used on receiving data */
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001022 conn_info->data_exchange_cb = cb;
1023 conn_info->data_exchange_cb_context = cb_context;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001024
Ilan Eliase8c0dac2011-11-09 12:09:14 +02001025 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
Ilan Elias38f04c62011-09-22 11:36:19 +03001026 if (rc)
1027 clear_bit(NCI_DATA_EXCHANGE, &ndev->flags);
1028
1029 return rc;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001030}
1031
Julien Lefrique485f4422014-10-21 16:52:48 +02001032static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
1033{
1034 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1035 int rc;
1036
1037 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1038 if (rc)
1039 pr_err("unable to send data\n");
1040
1041 return rc;
1042}
1043
Samuel Ortiz0a946302013-05-10 11:57:06 +02001044static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1045{
Christophe Ricard93bca2b2014-11-13 00:30:36 +01001046 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1047
1048 if (ndev->ops->enable_se)
1049 return ndev->ops->enable_se(ndev, se_idx);
1050
Samuel Ortiz0a946302013-05-10 11:57:06 +02001051 return 0;
1052}
1053
1054static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1055{
Christophe Ricarde9ef9432014-11-13 00:30:37 +01001056 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1057
1058 if (ndev->ops->disable_se)
1059 return ndev->ops->disable_se(ndev, se_idx);
1060
Samuel Ortiz0a946302013-05-10 11:57:06 +02001061 return 0;
1062}
1063
1064static int nci_discover_se(struct nfc_dev *nfc_dev)
1065{
Christophe Ricardfa00e8f2015-02-03 19:48:08 +01001066 int r;
Christophe Ricardba4db552014-11-13 00:30:35 +01001067 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1068
Christophe Ricardfa00e8f2015-02-03 19:48:08 +01001069 if (ndev->ops->discover_se) {
1070 r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE);
1071 if (r != NCI_STATUS_OK)
1072 return -EPROTO;
1073
Christophe Ricardba4db552014-11-13 00:30:35 +01001074 return ndev->ops->discover_se(ndev);
Christophe Ricardfa00e8f2015-02-03 19:48:08 +01001075 }
Christophe Ricardba4db552014-11-13 00:30:35 +01001076
Samuel Ortiz0a946302013-05-10 11:57:06 +02001077 return 0;
1078}
1079
Christophe Ricarda688bf52014-11-13 00:30:38 +01001080static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx,
1081 u8 *apdu, size_t apdu_length,
1082 se_io_cb_t cb, void *cb_context)
1083{
1084 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1085
1086 if (ndev->ops->se_io)
1087 return ndev->ops->se_io(ndev, se_idx, apdu,
1088 apdu_length, cb, cb_context);
1089
1090 return 0;
1091}
1092
Clément Perrochaud25af01ed2015-03-09 11:12:03 +01001093static int nci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name)
1094{
1095 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1096
1097 if (!ndev->ops->fw_download)
1098 return -ENOTSUPP;
1099
1100 return ndev->ops->fw_download(ndev, firmware_name);
1101}
1102
Ilan Elias6a2968a2011-09-18 11:19:35 +03001103static struct nfc_ops nci_nfc_ops = {
1104 .dev_up = nci_dev_up,
1105 .dev_down = nci_dev_down,
1106 .start_poll = nci_start_poll,
1107 .stop_poll = nci_stop_poll,
Ilan Elias767f19a2012-08-15 11:46:24 +03001108 .dep_link_up = nci_dep_link_up,
1109 .dep_link_down = nci_dep_link_down,
Ilan Elias6a2968a2011-09-18 11:19:35 +03001110 .activate_target = nci_activate_target,
1111 .deactivate_target = nci_deactivate_target,
Samuel Ortizbe9ae4c2012-05-16 15:55:48 +02001112 .im_transceive = nci_transceive,
Julien Lefrique485f4422014-10-21 16:52:48 +02001113 .tm_send = nci_tm_send,
Samuel Ortiz0a946302013-05-10 11:57:06 +02001114 .enable_se = nci_enable_se,
1115 .disable_se = nci_disable_se,
1116 .discover_se = nci_discover_se,
Christophe Ricarda688bf52014-11-13 00:30:38 +01001117 .se_io = nci_se_io,
Clément Perrochaud25af01ed2015-03-09 11:12:03 +01001118 .fw_download = nci_fw_download,
Ilan Elias6a2968a2011-09-18 11:19:35 +03001119};
1120
1121/* ---- Interface to NCI drivers ---- */
Ilan Elias6a2968a2011-09-18 11:19:35 +03001122/**
1123 * nci_allocate_device - allocate a new nci device
1124 *
1125 * @ops: device operations
1126 * @supported_protocols: NFC protocols supported by the device
1127 */
1128struct nci_dev *nci_allocate_device(struct nci_ops *ops,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +01001129 __u32 supported_protocols,
1130 int tx_headroom, int tx_tailroom)
Ilan Elias6a2968a2011-09-18 11:19:35 +03001131{
Dan Carpenter8ebafde2011-09-23 09:14:35 +03001132 struct nci_dev *ndev;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001133
Joe Perches24bf3302011-11-29 11:37:35 -08001134 pr_debug("supported_protocols 0x%x\n", supported_protocols);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001135
1136 if (!ops->open || !ops->close || !ops->send)
Dan Carpenter8ebafde2011-09-23 09:14:35 +03001137 return NULL;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001138
1139 if (!supported_protocols)
Dan Carpenter8ebafde2011-09-23 09:14:35 +03001140 return NULL;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001141
1142 ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL);
1143 if (!ndev)
Dan Carpenter8ebafde2011-09-23 09:14:35 +03001144 return NULL;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001145
1146 ndev->ops = ops;
Samuel Ortizb6355e92015-06-06 13:16:37 +02001147
1148 if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) {
1149 pr_err("Too many proprietary commands: %zd\n",
1150 ops->n_prop_ops);
1151 ops->prop_ops = NULL;
1152 ops->n_prop_ops = 0;
1153 }
1154
Ilan Elias6a2968a2011-09-18 11:19:35 +03001155 ndev->tx_headroom = tx_headroom;
1156 ndev->tx_tailroom = tx_tailroom;
Axel Lin9bec44b2014-02-13 13:25:48 +08001157 init_completion(&ndev->req_completion);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001158
1159 ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +01001160 supported_protocols,
1161 tx_headroom + NCI_DATA_HDR_SIZE,
1162 tx_tailroom);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001163 if (!ndev->nfc_dev)
Christophe Ricard11f54f22015-02-01 22:26:14 +01001164 goto free_nci;
1165
1166 ndev->hci_dev = nci_hci_allocate(ndev);
1167 if (!ndev->hci_dev)
1168 goto free_nfc;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001169
1170 nfc_set_drvdata(ndev->nfc_dev, ndev);
1171
Dan Carpenter8ebafde2011-09-23 09:14:35 +03001172 return ndev;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001173
Christophe Ricard11f54f22015-02-01 22:26:14 +01001174free_nfc:
Johan Hovold20777bc2017-03-30 12:15:35 +02001175 nfc_free_device(ndev->nfc_dev);
Christophe Ricard11f54f22015-02-01 22:26:14 +01001176free_nci:
Ilan Elias6a2968a2011-09-18 11:19:35 +03001177 kfree(ndev);
Dan Carpenter8ebafde2011-09-23 09:14:35 +03001178 return NULL;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001179}
1180EXPORT_SYMBOL(nci_allocate_device);
1181
1182/**
1183 * nci_free_device - deallocate nci device
1184 *
1185 * @ndev: The nci device to deallocate
1186 */
1187void nci_free_device(struct nci_dev *ndev)
1188{
Ilan Elias6a2968a2011-09-18 11:19:35 +03001189 nfc_free_device(ndev->nfc_dev);
1190 kfree(ndev);
1191}
1192EXPORT_SYMBOL(nci_free_device);
1193
1194/**
1195 * nci_register_device - register a nci device in the nfc subsystem
1196 *
1197 * @dev: The nci device to register
1198 */
1199int nci_register_device(struct nci_dev *ndev)
1200{
1201 int rc;
1202 struct device *dev = &ndev->nfc_dev->dev;
1203 char name[32];
1204
Ilan Elias6a2968a2011-09-18 11:19:35 +03001205 ndev->flags = 0;
1206
1207 INIT_WORK(&ndev->cmd_work, nci_cmd_work);
1208 snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev));
1209 ndev->cmd_wq = create_singlethread_workqueue(name);
1210 if (!ndev->cmd_wq) {
1211 rc = -ENOMEM;
Vincent Cuissard3c1c0f52014-07-22 19:48:39 +02001212 goto exit;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001213 }
1214
1215 INIT_WORK(&ndev->rx_work, nci_rx_work);
1216 snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev));
1217 ndev->rx_wq = create_singlethread_workqueue(name);
1218 if (!ndev->rx_wq) {
1219 rc = -ENOMEM;
1220 goto destroy_cmd_wq_exit;
1221 }
1222
1223 INIT_WORK(&ndev->tx_work, nci_tx_work);
1224 snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev));
1225 ndev->tx_wq = create_singlethread_workqueue(name);
1226 if (!ndev->tx_wq) {
1227 rc = -ENOMEM;
1228 goto destroy_rx_wq_exit;
1229 }
1230
1231 skb_queue_head_init(&ndev->cmd_q);
1232 skb_queue_head_init(&ndev->rx_q);
1233 skb_queue_head_init(&ndev->tx_q);
1234
Kees Cooke99e88a2017-10-16 14:43:17 -07001235 timer_setup(&ndev->cmd_timer, nci_cmd_timer, 0);
1236 timer_setup(&ndev->data_timer, nci_data_timer, 0);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001237
1238 mutex_init(&ndev->req_lock);
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001239 INIT_LIST_HEAD(&ndev->conn_info_list);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001240
Vincent Cuissard3c1c0f52014-07-22 19:48:39 +02001241 rc = nfc_register_device(ndev->nfc_dev);
1242 if (rc)
1243 goto destroy_rx_wq_exit;
1244
Ilan Elias6a2968a2011-09-18 11:19:35 +03001245 goto exit;
1246
1247destroy_rx_wq_exit:
1248 destroy_workqueue(ndev->rx_wq);
1249
1250destroy_cmd_wq_exit:
1251 destroy_workqueue(ndev->cmd_wq);
1252
Ilan Elias6a2968a2011-09-18 11:19:35 +03001253exit:
1254 return rc;
1255}
1256EXPORT_SYMBOL(nci_register_device);
1257
1258/**
1259 * nci_unregister_device - unregister a nci device in the nfc subsystem
1260 *
1261 * @dev: The nci device to unregister
1262 */
1263void nci_unregister_device(struct nci_dev *ndev)
1264{
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001265 struct nci_conn_info *conn_info, *n;
1266
Ilan Elias6a2968a2011-09-18 11:19:35 +03001267 nci_close_device(ndev);
1268
1269 destroy_workqueue(ndev->cmd_wq);
1270 destroy_workqueue(ndev->rx_wq);
1271 destroy_workqueue(ndev->tx_wq);
1272
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001273 list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) {
1274 list_del(&conn_info->list);
1275 /* conn_info is allocated with devm_kzalloc */
1276 }
1277
Ilan Elias6a2968a2011-09-18 11:19:35 +03001278 nfc_unregister_device(ndev->nfc_dev);
1279}
1280EXPORT_SYMBOL(nci_unregister_device);
1281
1282/**
1283 * nci_recv_frame - receive frame from NCI drivers
1284 *
Frederic Danis1095e692013-05-22 11:36:17 +02001285 * @ndev: The nci device
Ilan Elias6a2968a2011-09-18 11:19:35 +03001286 * @skb: The sk_buff to receive
1287 */
Frederic Danis1095e692013-05-22 11:36:17 +02001288int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
Ilan Elias6a2968a2011-09-18 11:19:35 +03001289{
Joe Perches24bf3302011-11-29 11:37:35 -08001290 pr_debug("len %d\n", skb->len);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001291
Szymon Janc874934f2012-10-04 15:15:51 +02001292 if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
1293 !test_bit(NCI_INIT, &ndev->flags))) {
Ilan Elias6a2968a2011-09-18 11:19:35 +03001294 kfree_skb(skb);
1295 return -ENXIO;
1296 }
1297
1298 /* Queue frame for rx worker thread */
1299 skb_queue_tail(&ndev->rx_q, skb);
1300 queue_work(ndev->rx_wq, &ndev->rx_work);
1301
1302 return 0;
1303}
1304EXPORT_SYMBOL(nci_recv_frame);
1305
Vincent Cuissarde5629d22015-10-26 10:27:38 +01001306int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb)
Ilan Elias6a2968a2011-09-18 11:19:35 +03001307{
Joe Perches24bf3302011-11-29 11:37:35 -08001308 pr_debug("len %d\n", skb->len);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001309
1310 if (!ndev) {
1311 kfree_skb(skb);
1312 return -ENODEV;
1313 }
1314
1315 /* Get rid of skb owner, prior to sending to the driver. */
1316 skb_orphan(skb);
1317
Hiren Tandel05158292014-05-05 19:52:27 +09001318 /* Send copy to sniffer */
1319 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1320 RAW_PAYLOAD_NCI, NFC_DIRECTION_TX);
1321
Frederic Danis1095e692013-05-22 11:36:17 +02001322 return ndev->ops->send(ndev, skb);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001323}
Vincent Cuissarde5629d22015-10-26 10:27:38 +01001324EXPORT_SYMBOL(nci_send_frame);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001325
1326/* Send NCI command */
1327int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload)
1328{
1329 struct nci_ctrl_hdr *hdr;
1330 struct sk_buff *skb;
1331
Joe Perches24bf3302011-11-29 11:37:35 -08001332 pr_debug("opcode 0x%x, plen %d\n", opcode, plen);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001333
1334 skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL);
1335 if (!skb) {
Joe Perchesed1e0ad2011-11-29 11:37:32 -08001336 pr_err("no memory for command\n");
Ilan Elias6a2968a2011-09-18 11:19:35 +03001337 return -ENOMEM;
1338 }
1339
Johannes Berg4df864c2017-06-16 14:29:21 +02001340 hdr = skb_put(skb, NCI_CTRL_HDR_SIZE);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001341 hdr->gid = nci_opcode_gid(opcode);
1342 hdr->oid = nci_opcode_oid(opcode);
1343 hdr->plen = plen;
1344
1345 nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT);
1346 nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST);
1347
1348 if (plen)
Johannes Berg59ae1d12017-06-16 14:29:20 +02001349 skb_put_data(skb, payload, plen);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001350
Ilan Elias6a2968a2011-09-18 11:19:35 +03001351 skb_queue_tail(&ndev->cmd_q, skb);
1352 queue_work(ndev->cmd_wq, &ndev->cmd_work);
1353
1354 return 0;
1355}
Vincent Cuissarde5629d22015-10-26 10:27:38 +01001356EXPORT_SYMBOL(nci_send_cmd);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001357
Samuel Ortizb6355e92015-06-06 13:16:37 +02001358/* Proprietary commands API */
Robert Dolca22e4bd02015-10-22 12:11:39 +03001359static struct nci_driver_ops *ops_cmd_lookup(struct nci_driver_ops *ops,
1360 size_t n_ops,
1361 __u16 opcode)
Samuel Ortizb6355e92015-06-06 13:16:37 +02001362{
1363 size_t i;
Robert Dolca22e4bd02015-10-22 12:11:39 +03001364 struct nci_driver_ops *op;
Samuel Ortizb6355e92015-06-06 13:16:37 +02001365
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001366 if (!ops || !n_ops)
Samuel Ortizb6355e92015-06-06 13:16:37 +02001367 return NULL;
1368
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001369 for (i = 0; i < n_ops; i++) {
1370 op = &ops[i];
1371 if (op->opcode == opcode)
1372 return op;
Samuel Ortizb6355e92015-06-06 13:16:37 +02001373 }
1374
1375 return NULL;
1376}
1377
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001378static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode,
Robert Dolca22e4bd02015-10-22 12:11:39 +03001379 struct sk_buff *skb, struct nci_driver_ops *ops,
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001380 size_t n_ops)
Samuel Ortizb6355e92015-06-06 13:16:37 +02001381{
Robert Dolca22e4bd02015-10-22 12:11:39 +03001382 struct nci_driver_ops *op;
Samuel Ortizb6355e92015-06-06 13:16:37 +02001383
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001384 op = ops_cmd_lookup(ops, n_ops, rsp_opcode);
1385 if (!op || !op->rsp)
Samuel Ortizb6355e92015-06-06 13:16:37 +02001386 return -ENOTSUPP;
1387
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001388 return op->rsp(ndev, skb);
Samuel Ortizb6355e92015-06-06 13:16:37 +02001389}
1390
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001391static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode,
Robert Dolca22e4bd02015-10-22 12:11:39 +03001392 struct sk_buff *skb, struct nci_driver_ops *ops,
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001393 size_t n_ops)
Samuel Ortizb6355e92015-06-06 13:16:37 +02001394{
Robert Dolca22e4bd02015-10-22 12:11:39 +03001395 struct nci_driver_ops *op;
Samuel Ortizb6355e92015-06-06 13:16:37 +02001396
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001397 op = ops_cmd_lookup(ops, n_ops, ntf_opcode);
1398 if (!op || !op->ntf)
Samuel Ortizb6355e92015-06-06 13:16:37 +02001399 return -ENOTSUPP;
1400
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001401 return op->ntf(ndev, skb);
1402}
1403
Robert Dolcaf1163172015-10-26 13:58:54 +02001404int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1405 struct sk_buff *skb)
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001406{
1407 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1408 ndev->ops->n_prop_ops);
1409}
1410
Robert Dolcaf1163172015-10-26 13:58:54 +02001411int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1412 struct sk_buff *skb)
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001413{
1414 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1415 ndev->ops->n_prop_ops);
1416}
1417
Robert Dolcaf1163172015-10-26 13:58:54 +02001418int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1419 struct sk_buff *skb)
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001420{
1421 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops,
1422 ndev->ops->n_core_ops);
1423}
1424
Robert Dolcaf1163172015-10-26 13:58:54 +02001425int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1426 struct sk_buff *skb)
Robert Dolca0a97a3c2015-10-22 12:11:38 +03001427{
1428 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops,
1429 ndev->ops->n_core_ops);
Samuel Ortizb6355e92015-06-06 13:16:37 +02001430}
1431
Ilan Elias6a2968a2011-09-18 11:19:35 +03001432/* ---- NCI TX Data worker thread ---- */
1433
1434static void nci_tx_work(struct work_struct *work)
1435{
1436 struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work);
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001437 struct nci_conn_info *conn_info;
Ilan Elias6a2968a2011-09-18 11:19:35 +03001438 struct sk_buff *skb;
1439
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001440 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
1441 if (!conn_info)
1442 return;
1443
1444 pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt));
Ilan Elias6a2968a2011-09-18 11:19:35 +03001445
1446 /* Send queued tx data */
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001447 while (atomic_read(&conn_info->credits_cnt)) {
Ilan Elias6a2968a2011-09-18 11:19:35 +03001448 skb = skb_dequeue(&ndev->tx_q);
1449 if (!skb)
1450 return;
1451
Ilan Eliasdb98c822011-11-09 12:09:16 +02001452 /* Check if data flow control is used */
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001453 if (atomic_read(&conn_info->credits_cnt) !=
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +01001454 NCI_DATA_FLOW_CONTROL_NOT_USED)
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001455 atomic_dec(&conn_info->credits_cnt);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001456
Joe Perches20c239c2011-11-29 11:37:33 -08001457 pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n",
1458 nci_pbf(skb->data),
1459 nci_conn_id(skb->data),
1460 nci_plen(skb->data));
Ilan Elias6a2968a2011-09-18 11:19:35 +03001461
Frederic Danis1095e692013-05-22 11:36:17 +02001462 nci_send_frame(ndev, skb);
Ilan Eliasc4bf98b2012-01-17 12:03:50 +02001463
1464 mod_timer(&ndev->data_timer,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +01001465 jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT));
Ilan Elias6a2968a2011-09-18 11:19:35 +03001466 }
1467}
1468
1469/* ----- NCI RX worker thread (data & control) ----- */
1470
1471static void nci_rx_work(struct work_struct *work)
1472{
1473 struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work);
1474 struct sk_buff *skb;
1475
1476 while ((skb = skb_dequeue(&ndev->rx_q))) {
Hiren Tandel05158292014-05-05 19:52:27 +09001477
1478 /* Send copy to sniffer */
1479 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1480 RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);
1481
Ilan Elias6a2968a2011-09-18 11:19:35 +03001482 /* Process frame */
1483 switch (nci_mt(skb->data)) {
1484 case NCI_MT_RSP_PKT:
1485 nci_rsp_packet(ndev, skb);
1486 break;
1487
1488 case NCI_MT_NTF_PKT:
1489 nci_ntf_packet(ndev, skb);
1490 break;
1491
1492 case NCI_MT_DATA_PKT:
1493 nci_rx_data_packet(ndev, skb);
1494 break;
1495
1496 default:
Joe Perchesed1e0ad2011-11-29 11:37:32 -08001497 pr_err("unknown MT 0x%x\n", nci_mt(skb->data));
Ilan Elias6a2968a2011-09-18 11:19:35 +03001498 kfree_skb(skb);
1499 break;
1500 }
1501 }
Ilan Eliasc4bf98b2012-01-17 12:03:50 +02001502
1503 /* check if a data exchange timout has occurred */
1504 if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) {
1505 /* complete the data exchange transaction, if exists */
1506 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
Christophe Ricard4aeee6872015-02-01 22:26:08 +01001507 nci_data_exchange_complete(ndev, NULL,
1508 ndev->cur_conn_id,
1509 -ETIMEDOUT);
Ilan Eliasc4bf98b2012-01-17 12:03:50 +02001510
1511 clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
1512 }
Ilan Elias6a2968a2011-09-18 11:19:35 +03001513}
1514
1515/* ----- NCI TX CMD worker thread ----- */
1516
1517static void nci_cmd_work(struct work_struct *work)
1518{
1519 struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work);
1520 struct sk_buff *skb;
1521
Joe Perches24bf3302011-11-29 11:37:35 -08001522 pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt));
Ilan Elias6a2968a2011-09-18 11:19:35 +03001523
1524 /* Send queued command */
1525 if (atomic_read(&ndev->cmd_cnt)) {
1526 skb = skb_dequeue(&ndev->cmd_q);
1527 if (!skb)
1528 return;
1529
1530 atomic_dec(&ndev->cmd_cnt);
1531
Joe Perches20c239c2011-11-29 11:37:33 -08001532 pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
1533 nci_pbf(skb->data),
1534 nci_opcode_gid(nci_opcode(skb->data)),
1535 nci_opcode_oid(nci_opcode(skb->data)),
1536 nci_plen(skb->data));
Ilan Elias6a2968a2011-09-18 11:19:35 +03001537
Frederic Danis1095e692013-05-22 11:36:17 +02001538 nci_send_frame(ndev, skb);
Ilan Elias6a2968a2011-09-18 11:19:35 +03001539
1540 mod_timer(&ndev->cmd_timer,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +01001541 jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT));
Ilan Elias6a2968a2011-09-18 11:19:35 +03001542 }
1543}
Dave Jones8a70e7f2012-07-12 19:17:34 +02001544
1545MODULE_LICENSE("GPL");