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Commit | Line | Data |
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6a2968aa IE |
1 | /* |
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. | |
772dccf4 | 6 | * Copyright (C) 2014 Marvell International Ltd. |
6a2968aa IE |
7 | * |
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 | |
98b32dec | 24 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
6a2968aa IE |
25 | * |
26 | */ | |
27 | ||
52858b51 | 28 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
ed1e0ad8 | 29 | |
8a70e7f8 | 30 | #include <linux/module.h> |
b6355e97 | 31 | #include <linux/kernel.h> |
6a2968aa IE |
32 | #include <linux/types.h> |
33 | #include <linux/workqueue.h> | |
34 | #include <linux/completion.h> | |
bc3b2d7f | 35 | #include <linux/export.h> |
6a2968aa IE |
36 | #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 | ||
b16ae716 CR |
45 | struct core_conn_create_data { |
46 | int length; | |
47 | struct nci_core_conn_create_cmd *cmd; | |
48 | }; | |
49 | ||
6a2968aa IE |
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); | |
53 | ||
4aeee687 CR |
54 | struct 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 | ||
9b8d1a4c CR |
67 | int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type, |
68 | struct dest_spec_params *params) | |
85b9ce9a RD |
69 | { |
70 | struct nci_conn_info *conn_info; | |
71 | ||
72 | list_for_each_entry(conn_info, &ndev->conn_info_list, list) { | |
9b8d1a4c CR |
73 | if (conn_info->dest_type == dest_type) { |
74 | if (!params) | |
75 | return conn_info->conn_id; | |
03036184 GS |
76 | |
77 | if (params->id == conn_info->dest_params->id && | |
78 | params->protocol == conn_info->dest_params->protocol) | |
79 | return conn_info->conn_id; | |
9b8d1a4c | 80 | } |
85b9ce9a RD |
81 | } |
82 | ||
83 | return -EINVAL; | |
84 | } | |
9b8d1a4c | 85 | EXPORT_SYMBOL(nci_get_conn_info_by_dest_type_params); |
85b9ce9a | 86 | |
6a2968aa IE |
87 | /* ---- NCI requests ---- */ |
88 | ||
89 | void 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 | } | |
2df7f8c6 | 97 | EXPORT_SYMBOL(nci_req_complete); |
6a2968aa IE |
98 | |
99 | static 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. */ | |
109 | static int __nci_request(struct nci_dev *ndev, | |
eb9bc6e9 SO |
110 | void (*req)(struct nci_dev *ndev, unsigned long opt), |
111 | unsigned long opt, __u32 timeout) | |
6a2968aa IE |
112 | { |
113 | int rc = 0; | |
f8c141c3 | 114 | long completion_rc; |
6a2968aa IE |
115 | |
116 | ndev->req_status = NCI_REQ_PEND; | |
117 | ||
9bec44bf | 118 | reinit_completion(&ndev->req_completion); |
6a2968aa | 119 | req(ndev, opt); |
eb9bc6e9 SO |
120 | completion_rc = |
121 | wait_for_completion_interruptible_timeout(&ndev->req_completion, | |
122 | timeout); | |
6a2968aa | 123 | |
20c239c1 | 124 | pr_debug("wait_for_completion return %ld\n", completion_rc); |
6a2968aa IE |
125 | |
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 { | |
ed1e0ad8 JP |
141 | pr_err("wait_for_completion_interruptible_timeout failed %ld\n", |
142 | completion_rc); | |
6a2968aa IE |
143 | |
144 | rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc)); | |
145 | } | |
146 | ||
147 | ndev->req_status = ndev->req_result = 0; | |
148 | ||
149 | return rc; | |
150 | } | |
151 | ||
11f54f22 CR |
152 | inline int nci_request(struct nci_dev *ndev, |
153 | void (*req)(struct nci_dev *ndev, | |
154 | unsigned long opt), | |
155 | unsigned long opt, __u32 timeout) | |
6a2968aa IE |
156 | { |
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 | ||
170 | static void nci_reset_req(struct nci_dev *ndev, unsigned long opt) | |
171 | { | |
e8c0dacd IE |
172 | 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); | |
6a2968aa IE |
176 | } |
177 | ||
178 | static 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 | ||
183 | static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt) | |
184 | { | |
2eb1dc10 IE |
185 | struct nci_rf_disc_map_cmd cmd; |
186 | struct disc_map_config *cfg = cmd.mapping_configs; | |
187 | __u8 *num = &cmd.num_mapping_configs; | |
6a2968aa IE |
188 | int i; |
189 | ||
6a2968aa | 190 | /* set rf mapping configurations */ |
2eb1dc10 | 191 | *num = 0; |
6a2968aa IE |
192 | |
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] == | |
eb9bc6e9 | 196 | NCI_RF_INTERFACE_ISO_DEP) { |
2eb1dc10 | 197 | cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP; |
637d85a7 IE |
198 | cfg[*num].mode = NCI_DISC_MAP_MODE_POLL | |
199 | NCI_DISC_MAP_MODE_LISTEN; | |
200 | cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP; | |
2eb1dc10 | 201 | (*num)++; |
6a2968aa | 202 | } else if (ndev->supported_rf_interfaces[i] == |
eb9bc6e9 | 203 | NCI_RF_INTERFACE_NFC_DEP) { |
2eb1dc10 | 204 | cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP; |
637d85a7 IE |
205 | cfg[*num].mode = NCI_DISC_MAP_MODE_POLL | |
206 | NCI_DISC_MAP_MODE_LISTEN; | |
207 | cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP; | |
2eb1dc10 | 208 | (*num)++; |
6a2968aa IE |
209 | } |
210 | ||
2eb1dc10 | 211 | if (*num == NCI_MAX_NUM_MAPPING_CONFIGS) |
6a2968aa IE |
212 | break; |
213 | } | |
214 | ||
215 | nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD, | |
eb9bc6e9 | 216 | (1 + ((*num) * sizeof(struct disc_map_config))), &cmd); |
6a2968aa IE |
217 | } |
218 | ||
7e035230 IE |
219 | struct nci_set_config_param { |
220 | __u8 id; | |
221 | size_t len; | |
222 | __u8 *val; | |
223 | }; | |
224 | ||
225 | static 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 | ||
772dccf4 JL |
240 | struct nci_rf_discover_param { |
241 | __u32 im_protocols; | |
242 | __u32 tm_protocols; | |
243 | }; | |
244 | ||
6a2968aa IE |
245 | static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt) |
246 | { | |
772dccf4 JL |
247 | struct nci_rf_discover_param *param = |
248 | (struct nci_rf_discover_param *)opt; | |
6a2968aa | 249 | struct nci_rf_disc_cmd cmd; |
6a2968aa IE |
250 | |
251 | cmd.num_disc_configs = 0; | |
252 | ||
253 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && | |
772dccf4 JL |
254 | (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)) { | |
637d85a7 | 258 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 259 | NCI_NFC_A_PASSIVE_POLL_MODE; |
6a2968aa IE |
260 | 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) && | |
772dccf4 | 265 | (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) { |
637d85a7 | 266 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 267 | NCI_NFC_B_PASSIVE_POLL_MODE; |
6a2968aa IE |
268 | 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) && | |
772dccf4 JL |
273 | (param->im_protocols & NFC_PROTO_FELICA_MASK || |
274 | param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) { | |
637d85a7 | 275 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 276 | NCI_NFC_F_PASSIVE_POLL_MODE; |
6a2968aa IE |
277 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; |
278 | cmd.num_disc_configs++; | |
279 | } | |
280 | ||
cfdbeeaf | 281 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && |
772dccf4 | 282 | (param->im_protocols & NFC_PROTO_ISO15693_MASK)) { |
cfdbeeaf VC |
283 | 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 | ||
772dccf4 JL |
289 | 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 | ||
6a2968aa | 301 | nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD, |
eb9bc6e9 SO |
302 | (1 + (cmd.num_disc_configs * sizeof(struct disc_config))), |
303 | &cmd); | |
6a2968aa IE |
304 | } |
305 | ||
019c4fba IE |
306 | struct nci_rf_discover_select_param { |
307 | __u8 rf_discovery_id; | |
308 | __u8 rf_protocol; | |
309 | }; | |
310 | ||
311 | static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt) | |
312 | { | |
313 | struct nci_rf_discover_select_param *param = | |
eb9bc6e9 | 314 | (struct nci_rf_discover_select_param *)opt; |
019c4fba IE |
315 | 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, | |
eb9bc6e9 | 335 | sizeof(struct nci_rf_discover_select_cmd), &cmd); |
019c4fba IE |
336 | } |
337 | ||
6a2968aa IE |
338 | static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt) |
339 | { | |
340 | struct nci_rf_deactivate_cmd cmd; | |
341 | ||
9295b5b5 | 342 | cmd.type = opt; |
6a2968aa IE |
343 | |
344 | nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD, | |
eb9bc6e9 | 345 | sizeof(struct nci_rf_deactivate_cmd), &cmd); |
6a2968aa IE |
346 | } |
347 | ||
7bc4824e | 348 | struct nci_cmd_param { |
759afb8d CR |
349 | __u16 opcode; |
350 | size_t len; | |
351 | __u8 *payload; | |
352 | }; | |
353 | ||
7bc4824e | 354 | static void nci_generic_req(struct nci_dev *ndev, unsigned long opt) |
759afb8d | 355 | { |
7bc4824e RD |
356 | struct nci_cmd_param *param = |
357 | (struct nci_cmd_param *)opt; | |
759afb8d CR |
358 | |
359 | nci_send_cmd(ndev, param->opcode, param->len, param->payload); | |
360 | } | |
361 | ||
362 | int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload) | |
363 | { | |
7bc4824e | 364 | struct nci_cmd_param param; |
759afb8d CR |
365 | |
366 | param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid); | |
367 | param.len = len; | |
368 | param.payload = payload; | |
369 | ||
7bc4824e | 370 | return __nci_request(ndev, nci_generic_req, (unsigned long)¶m, |
759afb8d CR |
371 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
372 | } | |
373 | EXPORT_SYMBOL(nci_prop_cmd); | |
374 | ||
7bc4824e RD |
375 | int 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)¶m, | |
384 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
385 | } | |
386 | EXPORT_SYMBOL(nci_core_cmd); | |
387 | ||
025a0cb8 RB |
388 | int 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 | } | |
393 | EXPORT_SYMBOL(nci_core_reset); | |
394 | ||
395 | int 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 | } | |
400 | EXPORT_SYMBOL(nci_core_init); | |
401 | ||
1c53855f CR |
402 | struct nci_loopback_data { |
403 | u8 conn_id; | |
404 | struct sk_buff *data; | |
405 | }; | |
406 | ||
407 | static 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 | ||
414 | static 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 | ||
430 | int 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); | |
59ae1d12 | 464 | skb_put_data(skb, data, data_len); |
1c53855f CR |
465 | |
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 | } | |
477 | EXPORT_SYMBOL(nci_nfcc_loopback); | |
478 | ||
6a2968aa IE |
479 | static 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 | ||
c39daeee CR |
499 | 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 | } | |
6a2968aa | 506 | |
81859ab8 CR |
507 | if (!rc && ndev->ops->setup) { |
508 | rc = ndev->ops->setup(ndev); | |
509 | } | |
86e8586e | 510 | |
6a2968aa IE |
511 | if (!rc) { |
512 | rc = __nci_request(ndev, nci_init_req, 0, | |
eb9bc6e9 | 513 | msecs_to_jiffies(NCI_INIT_TIMEOUT)); |
6a2968aa IE |
514 | } |
515 | ||
e4dbd625 | 516 | if (!rc && ndev->ops->post_setup) |
fdf79bd4 | 517 | rc = ndev->ops->post_setup(ndev); |
fdf79bd4 | 518 | |
6a2968aa IE |
519 | if (!rc) { |
520 | rc = __nci_request(ndev, nci_init_complete_req, 0, | |
eb9bc6e9 | 521 | msecs_to_jiffies(NCI_INIT_TIMEOUT)); |
6a2968aa IE |
522 | } |
523 | ||
524 | clear_bit(NCI_INIT, &ndev->flags); | |
525 | ||
526 | if (!rc) { | |
527 | set_bit(NCI_UP, &ndev->flags); | |
019c4fba | 528 | nci_clear_target_list(ndev); |
8939e47f | 529 | atomic_set(&ndev->state, NCI_IDLE); |
6a2968aa IE |
530 | } 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 | ||
540 | done: | |
541 | mutex_unlock(&ndev->req_lock); | |
542 | return rc; | |
543 | } | |
544 | ||
545 | static 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); | |
c4bf98b2 | 552 | del_timer_sync(&ndev->data_timer); |
6a2968aa IE |
553 | 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, | |
eb9bc6e9 | 571 | msecs_to_jiffies(NCI_RESET_TIMEOUT)); |
0e70cba7 CR |
572 | |
573 | /* After this point our queues are empty | |
574 | * and no works are scheduled. | |
575 | */ | |
576 | ndev->ops->close(ndev); | |
577 | ||
6a2968aa IE |
578 | clear_bit(NCI_INIT, &ndev->flags); |
579 | ||
fa9be5f0 AK |
580 | del_timer_sync(&ndev->cmd_timer); |
581 | ||
6a2968aa IE |
582 | /* Flush cmd wq */ |
583 | flush_workqueue(ndev->cmd_wq); | |
584 | ||
6a2968aa IE |
585 | /* Clear flags */ |
586 | ndev->flags = 0; | |
587 | ||
588 | mutex_unlock(&ndev->req_lock); | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | /* NCI command timer function */ | |
e99e88a9 | 594 | static void nci_cmd_timer(struct timer_list *t) |
6a2968aa | 595 | { |
e99e88a9 | 596 | struct nci_dev *ndev = from_timer(ndev, t, cmd_timer); |
6a2968aa | 597 | |
6a2968aa IE |
598 | atomic_set(&ndev->cmd_cnt, 1); |
599 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
600 | } | |
601 | ||
c4bf98b2 | 602 | /* NCI data exchange timer function */ |
e99e88a9 | 603 | static void nci_data_timer(struct timer_list *t) |
c4bf98b2 | 604 | { |
e99e88a9 | 605 | struct nci_dev *ndev = from_timer(ndev, t, data_timer); |
c4bf98b2 IE |
606 | |
607 | set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); | |
608 | queue_work(ndev->rx_wq, &ndev->rx_work); | |
609 | } | |
610 | ||
6a2968aa IE |
611 | static int nci_dev_up(struct nfc_dev *nfc_dev) |
612 | { | |
613 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
614 | ||
6a2968aa IE |
615 | return nci_open_device(ndev); |
616 | } | |
617 | ||
618 | static int nci_dev_down(struct nfc_dev *nfc_dev) | |
619 | { | |
620 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
621 | ||
6a2968aa IE |
622 | return nci_close_device(ndev); |
623 | } | |
624 | ||
22c15bf3 AK |
625 | int 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)¶m, | |
637 | msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); | |
638 | } | |
639 | EXPORT_SYMBOL(nci_set_config); | |
640 | ||
af9c8aa6 CR |
641 | static 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 | ||
651 | int nci_nfcee_discover(struct nci_dev *ndev, u8 action) | |
652 | { | |
21d19f87 | 653 | return __nci_request(ndev, nci_nfcee_discover_req, action, |
af9c8aa6 CR |
654 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
655 | } | |
656 | EXPORT_SYMBOL(nci_nfcee_discover); | |
657 | ||
f7f793f3 CR |
658 | static 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 | ||
667 | int 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 | ||
21d19f87 SO |
674 | return __nci_request(ndev, nci_nfcee_mode_set_req, |
675 | (unsigned long)&cmd, | |
676 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
f7f793f3 CR |
677 | } |
678 | EXPORT_SYMBOL(nci_nfcee_mode_set); | |
679 | ||
736bb957 CR |
680 | static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt) |
681 | { | |
b16ae716 CR |
682 | struct core_conn_create_data *data = |
683 | (struct core_conn_create_data *)opt; | |
684 | ||
685 | nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd); | |
736bb957 CR |
686 | } |
687 | ||
b16ae716 CR |
688 | int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type, |
689 | u8 number_destination_params, | |
690 | size_t params_len, | |
736bb957 CR |
691 | struct core_conn_create_dest_spec_params *params) |
692 | { | |
b16ae716 CR |
693 | 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; | |
b16ae716 CR |
704 | |
705 | data.cmd = cmd; | |
caa575a8 | 706 | |
18836029 CR |
707 | if (params) { |
708 | memcpy(cmd->params, params, params_len); | |
709 | if (params->length > 0) | |
9b8d1a4c CR |
710 | memcpy(&ndev->cur_params, |
711 | ¶ms->value[DEST_SPEC_PARAMS_ID_INDEX], | |
712 | sizeof(struct dest_spec_params)); | |
18836029 | 713 | else |
9b8d1a4c | 714 | ndev->cur_params.id = 0; |
18836029 | 715 | } else { |
9b8d1a4c | 716 | ndev->cur_params.id = 0; |
18836029 | 717 | } |
9b8d1a4c | 718 | ndev->cur_dest_type = destination_type; |
b16ae716 | 719 | |
18836029 | 720 | r = __nci_request(ndev, nci_core_conn_create_req, (unsigned long)&data, |
b16ae716 CR |
721 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
722 | kfree(cmd); | |
723 | return r; | |
736bb957 CR |
724 | } |
725 | EXPORT_SYMBOL(nci_core_conn_create); | |
726 | ||
727 | static 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 | ||
734 | int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id) | |
735 | { | |
de5ea851 | 736 | ndev->cur_conn_id = conn_id; |
21d19f87 SO |
737 | return __nci_request(ndev, nci_core_conn_close_req, conn_id, |
738 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
736bb957 CR |
739 | } |
740 | EXPORT_SYMBOL(nci_core_conn_close); | |
741 | ||
7e035230 IE |
742 | static 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; | |
529ee066 | 746 | int rc; |
7e035230 IE |
747 | |
748 | param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len); | |
749 | if ((param.val == NULL) || (param.len == 0)) | |
f9fc36f4 | 750 | return 0; |
7e035230 | 751 | |
460d8f97 | 752 | if (param.len > NFC_MAX_GT_LEN) |
7e035230 IE |
753 | return -EINVAL; |
754 | ||
7e035230 | 755 | param.id = NCI_PN_ATR_REQ_GEN_BYTES; |
7e035230 | 756 | |
529ee066 JL |
757 | rc = nci_request(ndev, nci_set_config_req, (unsigned long)¶m, |
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 | ||
f9fc36f4 SJ |
764 | return nci_request(ndev, nci_set_config_req, (unsigned long)¶m, |
765 | msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); | |
7e035230 IE |
766 | } |
767 | ||
90d78c13 JL |
768 | static 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 | ||
fe7c5800 SO |
791 | static int nci_start_poll(struct nfc_dev *nfc_dev, |
792 | __u32 im_protocols, __u32 tm_protocols) | |
6a2968aa IE |
793 | { |
794 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
772dccf4 | 795 | struct nci_rf_discover_param param; |
6a2968aa IE |
796 | int rc; |
797 | ||
019c4fba | 798 | if ((atomic_read(&ndev->state) == NCI_DISCOVERY) || |
eb9bc6e9 | 799 | (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) { |
ed1e0ad8 | 800 | pr_err("unable to start poll, since poll is already active\n"); |
6a2968aa IE |
801 | return -EBUSY; |
802 | } | |
803 | ||
de054799 | 804 | if (ndev->target_active_prot) { |
ed1e0ad8 | 805 | pr_err("there is an active target\n"); |
de054799 IE |
806 | return -EBUSY; |
807 | } | |
808 | ||
019c4fba | 809 | if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) || |
eb9bc6e9 | 810 | (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) { |
019c4fba | 811 | pr_debug("target active or w4 select, implicitly deactivate\n"); |
6a2968aa | 812 | |
9295b5b5 CR |
813 | rc = nci_request(ndev, nci_rf_deactivate_req, |
814 | NCI_DEACTIVATE_TYPE_IDLE_MODE, | |
eb9bc6e9 | 815 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
816 | if (rc) |
817 | return -EBUSY; | |
818 | } | |
819 | ||
529ee066 | 820 | if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) { |
7e035230 IE |
821 | 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 | ||
90d78c13 JL |
828 | 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 | ||
772dccf4 JL |
834 | param.im_protocols = im_protocols; |
835 | param.tm_protocols = tm_protocols; | |
836 | rc = nci_request(ndev, nci_rf_discover_req, (unsigned long)¶m, | |
eb9bc6e9 | 837 | msecs_to_jiffies(NCI_RF_DISC_TIMEOUT)); |
6a2968aa IE |
838 | |
839 | if (!rc) | |
fe7c5800 | 840 | ndev->poll_prots = im_protocols; |
6a2968aa IE |
841 | |
842 | return rc; | |
843 | } | |
844 | ||
845 | static void nci_stop_poll(struct nfc_dev *nfc_dev) | |
846 | { | |
847 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
848 | ||
019c4fba | 849 | if ((atomic_read(&ndev->state) != NCI_DISCOVERY) && |
eb9bc6e9 | 850 | (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) { |
ed1e0ad8 | 851 | pr_err("unable to stop poll, since poll is not active\n"); |
6a2968aa IE |
852 | return; |
853 | } | |
854 | ||
9295b5b5 | 855 | nci_request(ndev, nci_rf_deactivate_req, NCI_DEACTIVATE_TYPE_IDLE_MODE, |
eb9bc6e9 | 856 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
857 | } |
858 | ||
90099433 EL |
859 | static int nci_activate_target(struct nfc_dev *nfc_dev, |
860 | struct nfc_target *target, __u32 protocol) | |
6a2968aa IE |
861 | { |
862 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
019c4fba | 863 | struct nci_rf_discover_select_param param; |
90099433 | 864 | struct nfc_target *nci_target = NULL; |
019c4fba IE |
865 | int i; |
866 | int rc = 0; | |
6a2968aa | 867 | |
90099433 | 868 | pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol); |
6a2968aa | 869 | |
019c4fba | 870 | if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) && |
eb9bc6e9 | 871 | (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) { |
ed1e0ad8 | 872 | pr_err("there is no available target to activate\n"); |
6a2968aa IE |
873 | return -EINVAL; |
874 | } | |
875 | ||
876 | if (ndev->target_active_prot) { | |
ed1e0ad8 | 877 | pr_err("there is already an active target\n"); |
6a2968aa IE |
878 | return -EBUSY; |
879 | } | |
880 | ||
019c4fba | 881 | for (i = 0; i < ndev->n_targets; i++) { |
90099433 EL |
882 | if (ndev->targets[i].idx == target->idx) { |
883 | nci_target = &ndev->targets[i]; | |
019c4fba IE |
884 | break; |
885 | } | |
886 | } | |
887 | ||
90099433 | 888 | if (!nci_target) { |
019c4fba IE |
889 | pr_err("unable to find the selected target\n"); |
890 | return -EINVAL; | |
891 | } | |
892 | ||
90099433 | 893 | if (!(nci_target->supported_protocols & (1 << protocol))) { |
ed1e0ad8 JP |
894 | pr_err("target does not support the requested protocol 0x%x\n", |
895 | protocol); | |
6a2968aa IE |
896 | return -EINVAL; |
897 | } | |
898 | ||
019c4fba | 899 | if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) { |
90099433 | 900 | param.rf_discovery_id = nci_target->logical_idx; |
019c4fba IE |
901 | |
902 | 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; | |
01d719a2 SO |
908 | else if (protocol == NFC_PROTO_ISO14443 || |
909 | protocol == NFC_PROTO_ISO14443_B) | |
019c4fba IE |
910 | 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, | |
eb9bc6e9 SO |
915 | (unsigned long)¶m, |
916 | msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT)); | |
019c4fba | 917 | } |
6a2968aa | 918 | |
019c4fba IE |
919 | if (!rc) |
920 | ndev->target_active_prot = protocol; | |
921 | ||
922 | return rc; | |
6a2968aa IE |
923 | } |
924 | ||
90099433 | 925 | static void nci_deactivate_target(struct nfc_dev *nfc_dev, |
96d4581f CR |
926 | struct nfc_target *target, |
927 | __u8 mode) | |
6a2968aa IE |
928 | { |
929 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
96d4581f | 930 | u8 nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE; |
6a2968aa | 931 | |
767f19ae | 932 | pr_debug("entry\n"); |
6a2968aa IE |
933 | |
934 | if (!ndev->target_active_prot) { | |
ed1e0ad8 | 935 | pr_err("unable to deactivate target, no active target\n"); |
6a2968aa IE |
936 | return; |
937 | } | |
938 | ||
939 | ndev->target_active_prot = 0; | |
940 | ||
96d4581f CR |
941 | switch (mode) { |
942 | case NFC_TARGET_MODE_SLEEP: | |
943 | nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE; | |
944 | break; | |
945 | } | |
946 | ||
8939e47f | 947 | if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) { |
96d4581f | 948 | nci_request(ndev, nci_rf_deactivate_req, nci_mode, |
eb9bc6e9 | 949 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
950 | } |
951 | } | |
952 | ||
767f19ae IE |
953 | static 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 | ||
974 | static int nci_dep_link_down(struct nfc_dev *nfc_dev) | |
975 | { | |
d7979e13 JL |
976 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
977 | int rc; | |
978 | ||
767f19ae IE |
979 | pr_debug("entry\n"); |
980 | ||
d7979e13 | 981 | if (nfc_dev->rf_mode == NFC_RF_INITIATOR) { |
96d4581f | 982 | nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE); |
d7979e13 JL |
983 | } 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 | } | |
767f19ae IE |
994 | |
995 | return 0; | |
996 | } | |
997 | ||
998 | ||
be9ae4ce SO |
999 | static 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) | |
6a2968aa IE |
1002 | { |
1003 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
38f04c6b | 1004 | int rc; |
4aeee687 CR |
1005 | struct nci_conn_info *conn_info; |
1006 | ||
12bdf27d | 1007 | conn_info = ndev->rf_conn_info; |
4aeee687 CR |
1008 | if (!conn_info) |
1009 | return -EPROTO; | |
6a2968aa | 1010 | |
90099433 | 1011 | pr_debug("target_idx %d, len %d\n", target->idx, skb->len); |
6a2968aa IE |
1012 | |
1013 | if (!ndev->target_active_prot) { | |
ed1e0ad8 | 1014 | pr_err("unable to exchange data, no active target\n"); |
6a2968aa IE |
1015 | return -EINVAL; |
1016 | } | |
1017 | ||
38f04c6b IE |
1018 | if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags)) |
1019 | return -EBUSY; | |
1020 | ||
6a2968aa | 1021 | /* store cb and context to be used on receiving data */ |
4aeee687 CR |
1022 | conn_info->data_exchange_cb = cb; |
1023 | conn_info->data_exchange_cb_context = cb_context; | |
6a2968aa | 1024 | |
e8c0dacd | 1025 | rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb); |
38f04c6b IE |
1026 | if (rc) |
1027 | clear_bit(NCI_DATA_EXCHANGE, &ndev->flags); | |
1028 | ||
1029 | return rc; | |
6a2968aa IE |
1030 | } |
1031 | ||
485f442f JL |
1032 | static 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 | ||
0a946301 SO |
1044 | static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx) |
1045 | { | |
93bca2bf CR |
1046 | 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 | ||
0a946301 SO |
1051 | return 0; |
1052 | } | |
1053 | ||
1054 | static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx) | |
1055 | { | |
e9ef9431 CR |
1056 | 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 | ||
0a946301 SO |
1061 | return 0; |
1062 | } | |
1063 | ||
1064 | static int nci_discover_se(struct nfc_dev *nfc_dev) | |
1065 | { | |
fa00e8fe | 1066 | int r; |
ba4db551 CR |
1067 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
1068 | ||
fa00e8fe CR |
1069 | 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 | ||
ba4db551 | 1074 | return ndev->ops->discover_se(ndev); |
fa00e8fe | 1075 | } |
ba4db551 | 1076 | |
0a946301 SO |
1077 | return 0; |
1078 | } | |
1079 | ||
a688bf55 CR |
1080 | static 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 | ||
25af01ed CP |
1093 | static 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 | ||
6a2968aa IE |
1103 | static 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, | |
767f19ae IE |
1108 | .dep_link_up = nci_dep_link_up, |
1109 | .dep_link_down = nci_dep_link_down, | |
6a2968aa IE |
1110 | .activate_target = nci_activate_target, |
1111 | .deactivate_target = nci_deactivate_target, | |
be9ae4ce | 1112 | .im_transceive = nci_transceive, |
485f442f | 1113 | .tm_send = nci_tm_send, |
0a946301 SO |
1114 | .enable_se = nci_enable_se, |
1115 | .disable_se = nci_disable_se, | |
1116 | .discover_se = nci_discover_se, | |
a688bf55 | 1117 | .se_io = nci_se_io, |
25af01ed | 1118 | .fw_download = nci_fw_download, |
6a2968aa IE |
1119 | }; |
1120 | ||
1121 | /* ---- Interface to NCI drivers ---- */ | |
6a2968aa IE |
1122 | /** |
1123 | * nci_allocate_device - allocate a new nci device | |
1124 | * | |
1125 | * @ops: device operations | |
1126 | * @supported_protocols: NFC protocols supported by the device | |
1127 | */ | |
1128 | struct nci_dev *nci_allocate_device(struct nci_ops *ops, | |
eb9bc6e9 SO |
1129 | __u32 supported_protocols, |
1130 | int tx_headroom, int tx_tailroom) | |
6a2968aa | 1131 | { |
8ebafde0 | 1132 | struct nci_dev *ndev; |
6a2968aa | 1133 | |
24bf3304 | 1134 | pr_debug("supported_protocols 0x%x\n", supported_protocols); |
6a2968aa IE |
1135 | |
1136 | if (!ops->open || !ops->close || !ops->send) | |
8ebafde0 | 1137 | return NULL; |
6a2968aa IE |
1138 | |
1139 | if (!supported_protocols) | |
8ebafde0 | 1140 | return NULL; |
6a2968aa IE |
1141 | |
1142 | ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL); | |
1143 | if (!ndev) | |
8ebafde0 | 1144 | return NULL; |
6a2968aa IE |
1145 | |
1146 | ndev->ops = ops; | |
b6355e97 SO |
1147 | |
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 | ||
6a2968aa IE |
1155 | ndev->tx_headroom = tx_headroom; |
1156 | ndev->tx_tailroom = tx_tailroom; | |
9bec44bf | 1157 | init_completion(&ndev->req_completion); |
6a2968aa IE |
1158 | |
1159 | ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops, | |
eb9bc6e9 SO |
1160 | supported_protocols, |
1161 | tx_headroom + NCI_DATA_HDR_SIZE, | |
1162 | tx_tailroom); | |
6a2968aa | 1163 | if (!ndev->nfc_dev) |
11f54f22 CR |
1164 | goto free_nci; |
1165 | ||
1166 | ndev->hci_dev = nci_hci_allocate(ndev); | |
1167 | if (!ndev->hci_dev) | |
1168 | goto free_nfc; | |
6a2968aa IE |
1169 | |
1170 | nfc_set_drvdata(ndev->nfc_dev, ndev); | |
1171 | ||
8ebafde0 | 1172 | return ndev; |
6a2968aa | 1173 | |
11f54f22 | 1174 | free_nfc: |
20777bc5 | 1175 | nfc_free_device(ndev->nfc_dev); |
11f54f22 | 1176 | free_nci: |
6a2968aa | 1177 | kfree(ndev); |
8ebafde0 | 1178 | return NULL; |
6a2968aa IE |
1179 | } |
1180 | EXPORT_SYMBOL(nci_allocate_device); | |
1181 | ||
1182 | /** | |
1183 | * nci_free_device - deallocate nci device | |
1184 | * | |
1185 | * @ndev: The nci device to deallocate | |
1186 | */ | |
1187 | void nci_free_device(struct nci_dev *ndev) | |
1188 | { | |
6a2968aa IE |
1189 | nfc_free_device(ndev->nfc_dev); |
1190 | kfree(ndev); | |
1191 | } | |
1192 | EXPORT_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 | */ | |
1199 | int nci_register_device(struct nci_dev *ndev) | |
1200 | { | |
1201 | int rc; | |
1202 | struct device *dev = &ndev->nfc_dev->dev; | |
1203 | char name[32]; | |
1204 | ||
6a2968aa IE |
1205 | 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; | |
3c1c0f5d | 1212 | goto exit; |
6a2968aa IE |
1213 | } |
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 | ||
e99e88a9 KC |
1235 | timer_setup(&ndev->cmd_timer, nci_cmd_timer, 0); |
1236 | timer_setup(&ndev->data_timer, nci_data_timer, 0); | |
6a2968aa IE |
1237 | |
1238 | mutex_init(&ndev->req_lock); | |
4aeee687 | 1239 | INIT_LIST_HEAD(&ndev->conn_info_list); |
6a2968aa | 1240 | |
3c1c0f5d VC |
1241 | rc = nfc_register_device(ndev->nfc_dev); |
1242 | if (rc) | |
1243 | goto destroy_rx_wq_exit; | |
1244 | ||
6a2968aa IE |
1245 | goto exit; |
1246 | ||
1247 | destroy_rx_wq_exit: | |
1248 | destroy_workqueue(ndev->rx_wq); | |
1249 | ||
1250 | destroy_cmd_wq_exit: | |
1251 | destroy_workqueue(ndev->cmd_wq); | |
1252 | ||
6a2968aa IE |
1253 | exit: |
1254 | return rc; | |
1255 | } | |
1256 | EXPORT_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 | */ | |
1263 | void nci_unregister_device(struct nci_dev *ndev) | |
1264 | { | |
4aeee687 CR |
1265 | struct nci_conn_info *conn_info, *n; |
1266 | ||
6a2968aa IE |
1267 | nci_close_device(ndev); |
1268 | ||
1269 | destroy_workqueue(ndev->cmd_wq); | |
1270 | destroy_workqueue(ndev->rx_wq); | |
1271 | destroy_workqueue(ndev->tx_wq); | |
1272 | ||
4aeee687 CR |
1273 | 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 | ||
6a2968aa IE |
1278 | nfc_unregister_device(ndev->nfc_dev); |
1279 | } | |
1280 | EXPORT_SYMBOL(nci_unregister_device); | |
1281 | ||
1282 | /** | |
1283 | * nci_recv_frame - receive frame from NCI drivers | |
1284 | * | |
1095e69f | 1285 | * @ndev: The nci device |
6a2968aa IE |
1286 | * @skb: The sk_buff to receive |
1287 | */ | |
1095e69f | 1288 | int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb) |
6a2968aa | 1289 | { |
24bf3304 | 1290 | pr_debug("len %d\n", skb->len); |
6a2968aa | 1291 | |
874934f4 SJ |
1292 | if (!ndev || (!test_bit(NCI_UP, &ndev->flags) && |
1293 | !test_bit(NCI_INIT, &ndev->flags))) { | |
6a2968aa IE |
1294 | 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 | } | |
1304 | EXPORT_SYMBOL(nci_recv_frame); | |
1305 | ||
e5629d29 | 1306 | int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb) |
6a2968aa | 1307 | { |
24bf3304 | 1308 | pr_debug("len %d\n", skb->len); |
6a2968aa IE |
1309 | |
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 | ||
05158296 HT |
1318 | /* Send copy to sniffer */ |
1319 | nfc_send_to_raw_sock(ndev->nfc_dev, skb, | |
1320 | RAW_PAYLOAD_NCI, NFC_DIRECTION_TX); | |
1321 | ||
1095e69f | 1322 | return ndev->ops->send(ndev, skb); |
6a2968aa | 1323 | } |
e5629d29 | 1324 | EXPORT_SYMBOL(nci_send_frame); |
6a2968aa IE |
1325 | |
1326 | /* Send NCI command */ | |
1327 | int 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 | ||
24bf3304 | 1332 | pr_debug("opcode 0x%x, plen %d\n", opcode, plen); |
6a2968aa IE |
1333 | |
1334 | skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL); | |
1335 | if (!skb) { | |
ed1e0ad8 | 1336 | pr_err("no memory for command\n"); |
6a2968aa IE |
1337 | return -ENOMEM; |
1338 | } | |
1339 | ||
4df864c1 | 1340 | hdr = skb_put(skb, NCI_CTRL_HDR_SIZE); |
6a2968aa IE |
1341 | 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) | |
59ae1d12 | 1349 | skb_put_data(skb, payload, plen); |
6a2968aa | 1350 | |
6a2968aa IE |
1351 | skb_queue_tail(&ndev->cmd_q, skb); |
1352 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
1353 | ||
1354 | return 0; | |
1355 | } | |
e5629d29 | 1356 | EXPORT_SYMBOL(nci_send_cmd); |
6a2968aa | 1357 | |
b6355e97 | 1358 | /* Proprietary commands API */ |
22e4bd09 RD |
1359 | static struct nci_driver_ops *ops_cmd_lookup(struct nci_driver_ops *ops, |
1360 | size_t n_ops, | |
1361 | __u16 opcode) | |
b6355e97 SO |
1362 | { |
1363 | size_t i; | |
22e4bd09 | 1364 | struct nci_driver_ops *op; |
b6355e97 | 1365 | |
0a97a3cb | 1366 | if (!ops || !n_ops) |
b6355e97 SO |
1367 | return NULL; |
1368 | ||
0a97a3cb RD |
1369 | for (i = 0; i < n_ops; i++) { |
1370 | op = &ops[i]; | |
1371 | if (op->opcode == opcode) | |
1372 | return op; | |
b6355e97 SO |
1373 | } |
1374 | ||
1375 | return NULL; | |
1376 | } | |
1377 | ||
0a97a3cb | 1378 | static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode, |
22e4bd09 | 1379 | struct sk_buff *skb, struct nci_driver_ops *ops, |
0a97a3cb | 1380 | size_t n_ops) |
b6355e97 | 1381 | { |
22e4bd09 | 1382 | struct nci_driver_ops *op; |
b6355e97 | 1383 | |
0a97a3cb RD |
1384 | op = ops_cmd_lookup(ops, n_ops, rsp_opcode); |
1385 | if (!op || !op->rsp) | |
b6355e97 SO |
1386 | return -ENOTSUPP; |
1387 | ||
0a97a3cb | 1388 | return op->rsp(ndev, skb); |
b6355e97 SO |
1389 | } |
1390 | ||
0a97a3cb | 1391 | static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode, |
22e4bd09 | 1392 | struct sk_buff *skb, struct nci_driver_ops *ops, |
0a97a3cb | 1393 | size_t n_ops) |
b6355e97 | 1394 | { |
22e4bd09 | 1395 | struct nci_driver_ops *op; |
b6355e97 | 1396 | |
0a97a3cb RD |
1397 | op = ops_cmd_lookup(ops, n_ops, ntf_opcode); |
1398 | if (!op || !op->ntf) | |
b6355e97 SO |
1399 | return -ENOTSUPP; |
1400 | ||
0a97a3cb RD |
1401 | return op->ntf(ndev, skb); |
1402 | } | |
1403 | ||
f1163174 RD |
1404 | int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode, |
1405 | struct sk_buff *skb) | |
0a97a3cb RD |
1406 | { |
1407 | return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops, | |
1408 | ndev->ops->n_prop_ops); | |
1409 | } | |
1410 | ||
f1163174 RD |
1411 | int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode, |
1412 | struct sk_buff *skb) | |
0a97a3cb RD |
1413 | { |
1414 | return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops, | |
1415 | ndev->ops->n_prop_ops); | |
1416 | } | |
1417 | ||
f1163174 RD |
1418 | int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode, |
1419 | struct sk_buff *skb) | |
0a97a3cb RD |
1420 | { |
1421 | return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops, | |
1422 | ndev->ops->n_core_ops); | |
1423 | } | |
1424 | ||
f1163174 RD |
1425 | int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode, |
1426 | struct sk_buff *skb) | |
0a97a3cb RD |
1427 | { |
1428 | return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops, | |
1429 | ndev->ops->n_core_ops); | |
b6355e97 SO |
1430 | } |
1431 | ||
6a2968aa IE |
1432 | /* ---- NCI TX Data worker thread ---- */ |
1433 | ||
1434 | static void nci_tx_work(struct work_struct *work) | |
1435 | { | |
1436 | struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work); | |
4aeee687 | 1437 | struct nci_conn_info *conn_info; |
6a2968aa IE |
1438 | struct sk_buff *skb; |
1439 | ||
4aeee687 CR |
1440 | 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)); | |
6a2968aa IE |
1445 | |
1446 | /* Send queued tx data */ | |
4aeee687 | 1447 | while (atomic_read(&conn_info->credits_cnt)) { |
6a2968aa IE |
1448 | skb = skb_dequeue(&ndev->tx_q); |
1449 | if (!skb) | |
1450 | return; | |
1451 | ||
db98c829 | 1452 | /* Check if data flow control is used */ |
4aeee687 | 1453 | if (atomic_read(&conn_info->credits_cnt) != |
eb9bc6e9 | 1454 | NCI_DATA_FLOW_CONTROL_NOT_USED) |
4aeee687 | 1455 | atomic_dec(&conn_info->credits_cnt); |
6a2968aa | 1456 | |
20c239c1 JP |
1457 | 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)); | |
6a2968aa | 1461 | |
1095e69f | 1462 | nci_send_frame(ndev, skb); |
c4bf98b2 IE |
1463 | |
1464 | mod_timer(&ndev->data_timer, | |
eb9bc6e9 | 1465 | jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT)); |
6a2968aa IE |
1466 | } |
1467 | } | |
1468 | ||
1469 | /* ----- NCI RX worker thread (data & control) ----- */ | |
1470 | ||
1471 | static 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))) { | |
05158296 HT |
1477 | |
1478 | /* Send copy to sniffer */ | |
1479 | nfc_send_to_raw_sock(ndev->nfc_dev, skb, | |
1480 | RAW_PAYLOAD_NCI, NFC_DIRECTION_RX); | |
1481 | ||
6a2968aa IE |
1482 | /* 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: | |
ed1e0ad8 | 1497 | pr_err("unknown MT 0x%x\n", nci_mt(skb->data)); |
6a2968aa IE |
1498 | kfree_skb(skb); |
1499 | break; | |
1500 | } | |
1501 | } | |
c4bf98b2 IE |
1502 | |
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)) | |
4aeee687 CR |
1507 | nci_data_exchange_complete(ndev, NULL, |
1508 | ndev->cur_conn_id, | |
1509 | -ETIMEDOUT); | |
c4bf98b2 IE |
1510 | |
1511 | clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); | |
1512 | } | |
6a2968aa IE |
1513 | } |
1514 | ||
1515 | /* ----- NCI TX CMD worker thread ----- */ | |
1516 | ||
1517 | static 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 | ||
24bf3304 | 1522 | pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt)); |
6a2968aa IE |
1523 | |
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 | ||
20c239c1 JP |
1532 | 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)); | |
6a2968aa | 1537 | |
1095e69f | 1538 | nci_send_frame(ndev, skb); |
6a2968aa IE |
1539 | |
1540 | mod_timer(&ndev->cmd_timer, | |
eb9bc6e9 | 1541 | jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
6a2968aa IE |
1542 | } |
1543 | } | |
8a70e7f8 DJ |
1544 | |
1545 | MODULE_LICENSE("GPL"); |