Commit | Line | Data |
---|---|---|
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; | |
76 | if (conn_info) { | |
77 | if (params->id == conn_info->dest_params->id && | |
78 | params->protocol == conn_info->dest_params->protocol) | |
79 | return conn_info->conn_id; | |
80 | } | |
81 | } | |
85b9ce9a RD |
82 | } |
83 | ||
84 | return -EINVAL; | |
85 | } | |
9b8d1a4c | 86 | EXPORT_SYMBOL(nci_get_conn_info_by_dest_type_params); |
85b9ce9a | 87 | |
6a2968aa IE |
88 | /* ---- NCI requests ---- */ |
89 | ||
90 | void nci_req_complete(struct nci_dev *ndev, int result) | |
91 | { | |
92 | if (ndev->req_status == NCI_REQ_PEND) { | |
93 | ndev->req_result = result; | |
94 | ndev->req_status = NCI_REQ_DONE; | |
95 | complete(&ndev->req_completion); | |
96 | } | |
97 | } | |
2df7f8c6 | 98 | EXPORT_SYMBOL(nci_req_complete); |
6a2968aa IE |
99 | |
100 | static void nci_req_cancel(struct nci_dev *ndev, int err) | |
101 | { | |
102 | if (ndev->req_status == NCI_REQ_PEND) { | |
103 | ndev->req_result = err; | |
104 | ndev->req_status = NCI_REQ_CANCELED; | |
105 | complete(&ndev->req_completion); | |
106 | } | |
107 | } | |
108 | ||
109 | /* Execute request and wait for completion. */ | |
110 | static int __nci_request(struct nci_dev *ndev, | |
eb9bc6e9 SO |
111 | void (*req)(struct nci_dev *ndev, unsigned long opt), |
112 | unsigned long opt, __u32 timeout) | |
6a2968aa IE |
113 | { |
114 | int rc = 0; | |
f8c141c3 | 115 | long completion_rc; |
6a2968aa IE |
116 | |
117 | ndev->req_status = NCI_REQ_PEND; | |
118 | ||
9bec44bf | 119 | reinit_completion(&ndev->req_completion); |
6a2968aa | 120 | req(ndev, opt); |
eb9bc6e9 SO |
121 | completion_rc = |
122 | wait_for_completion_interruptible_timeout(&ndev->req_completion, | |
123 | timeout); | |
6a2968aa | 124 | |
20c239c1 | 125 | pr_debug("wait_for_completion return %ld\n", completion_rc); |
6a2968aa IE |
126 | |
127 | if (completion_rc > 0) { | |
128 | switch (ndev->req_status) { | |
129 | case NCI_REQ_DONE: | |
130 | rc = nci_to_errno(ndev->req_result); | |
131 | break; | |
132 | ||
133 | case NCI_REQ_CANCELED: | |
134 | rc = -ndev->req_result; | |
135 | break; | |
136 | ||
137 | default: | |
138 | rc = -ETIMEDOUT; | |
139 | break; | |
140 | } | |
141 | } else { | |
ed1e0ad8 JP |
142 | pr_err("wait_for_completion_interruptible_timeout failed %ld\n", |
143 | completion_rc); | |
6a2968aa IE |
144 | |
145 | rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc)); | |
146 | } | |
147 | ||
148 | ndev->req_status = ndev->req_result = 0; | |
149 | ||
150 | return rc; | |
151 | } | |
152 | ||
11f54f22 CR |
153 | inline int nci_request(struct nci_dev *ndev, |
154 | void (*req)(struct nci_dev *ndev, | |
155 | unsigned long opt), | |
156 | unsigned long opt, __u32 timeout) | |
6a2968aa IE |
157 | { |
158 | int rc; | |
159 | ||
160 | if (!test_bit(NCI_UP, &ndev->flags)) | |
161 | return -ENETDOWN; | |
162 | ||
163 | /* Serialize all requests */ | |
164 | mutex_lock(&ndev->req_lock); | |
165 | rc = __nci_request(ndev, req, opt, timeout); | |
166 | mutex_unlock(&ndev->req_lock); | |
167 | ||
168 | return rc; | |
169 | } | |
170 | ||
171 | static void nci_reset_req(struct nci_dev *ndev, unsigned long opt) | |
172 | { | |
e8c0dacd IE |
173 | struct nci_core_reset_cmd cmd; |
174 | ||
175 | cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG; | |
176 | nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd); | |
6a2968aa IE |
177 | } |
178 | ||
179 | static void nci_init_req(struct nci_dev *ndev, unsigned long opt) | |
180 | { | |
181 | nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, 0, NULL); | |
182 | } | |
183 | ||
184 | static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt) | |
185 | { | |
2eb1dc10 IE |
186 | struct nci_rf_disc_map_cmd cmd; |
187 | struct disc_map_config *cfg = cmd.mapping_configs; | |
188 | __u8 *num = &cmd.num_mapping_configs; | |
6a2968aa IE |
189 | int i; |
190 | ||
6a2968aa | 191 | /* set rf mapping configurations */ |
2eb1dc10 | 192 | *num = 0; |
6a2968aa IE |
193 | |
194 | /* by default mapping is set to NCI_RF_INTERFACE_FRAME */ | |
195 | for (i = 0; i < ndev->num_supported_rf_interfaces; i++) { | |
196 | if (ndev->supported_rf_interfaces[i] == | |
eb9bc6e9 | 197 | NCI_RF_INTERFACE_ISO_DEP) { |
2eb1dc10 | 198 | cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP; |
637d85a7 IE |
199 | cfg[*num].mode = NCI_DISC_MAP_MODE_POLL | |
200 | NCI_DISC_MAP_MODE_LISTEN; | |
201 | cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP; | |
2eb1dc10 | 202 | (*num)++; |
6a2968aa | 203 | } else if (ndev->supported_rf_interfaces[i] == |
eb9bc6e9 | 204 | NCI_RF_INTERFACE_NFC_DEP) { |
2eb1dc10 | 205 | cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP; |
637d85a7 IE |
206 | cfg[*num].mode = NCI_DISC_MAP_MODE_POLL | |
207 | NCI_DISC_MAP_MODE_LISTEN; | |
208 | cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP; | |
2eb1dc10 | 209 | (*num)++; |
6a2968aa IE |
210 | } |
211 | ||
2eb1dc10 | 212 | if (*num == NCI_MAX_NUM_MAPPING_CONFIGS) |
6a2968aa IE |
213 | break; |
214 | } | |
215 | ||
216 | nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD, | |
eb9bc6e9 | 217 | (1 + ((*num) * sizeof(struct disc_map_config))), &cmd); |
6a2968aa IE |
218 | } |
219 | ||
7e035230 IE |
220 | struct nci_set_config_param { |
221 | __u8 id; | |
222 | size_t len; | |
223 | __u8 *val; | |
224 | }; | |
225 | ||
226 | static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt) | |
227 | { | |
228 | struct nci_set_config_param *param = (struct nci_set_config_param *)opt; | |
229 | struct nci_core_set_config_cmd cmd; | |
230 | ||
231 | BUG_ON(param->len > NCI_MAX_PARAM_LEN); | |
232 | ||
233 | cmd.num_params = 1; | |
234 | cmd.param.id = param->id; | |
235 | cmd.param.len = param->len; | |
236 | memcpy(cmd.param.val, param->val, param->len); | |
237 | ||
238 | nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd); | |
239 | } | |
240 | ||
772dccf4 JL |
241 | struct nci_rf_discover_param { |
242 | __u32 im_protocols; | |
243 | __u32 tm_protocols; | |
244 | }; | |
245 | ||
6a2968aa IE |
246 | static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt) |
247 | { | |
772dccf4 JL |
248 | struct nci_rf_discover_param *param = |
249 | (struct nci_rf_discover_param *)opt; | |
6a2968aa | 250 | struct nci_rf_disc_cmd cmd; |
6a2968aa IE |
251 | |
252 | cmd.num_disc_configs = 0; | |
253 | ||
254 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && | |
772dccf4 JL |
255 | (param->im_protocols & NFC_PROTO_JEWEL_MASK || |
256 | param->im_protocols & NFC_PROTO_MIFARE_MASK || | |
257 | param->im_protocols & NFC_PROTO_ISO14443_MASK || | |
258 | param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) { | |
637d85a7 | 259 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 260 | NCI_NFC_A_PASSIVE_POLL_MODE; |
6a2968aa IE |
261 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; |
262 | cmd.num_disc_configs++; | |
263 | } | |
264 | ||
265 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && | |
772dccf4 | 266 | (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) { |
637d85a7 | 267 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 268 | NCI_NFC_B_PASSIVE_POLL_MODE; |
6a2968aa IE |
269 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; |
270 | cmd.num_disc_configs++; | |
271 | } | |
272 | ||
273 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && | |
772dccf4 JL |
274 | (param->im_protocols & NFC_PROTO_FELICA_MASK || |
275 | param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) { | |
637d85a7 | 276 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 277 | NCI_NFC_F_PASSIVE_POLL_MODE; |
6a2968aa IE |
278 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; |
279 | cmd.num_disc_configs++; | |
280 | } | |
281 | ||
cfdbeeaf | 282 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && |
772dccf4 | 283 | (param->im_protocols & NFC_PROTO_ISO15693_MASK)) { |
cfdbeeaf VC |
284 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
285 | NCI_NFC_V_PASSIVE_POLL_MODE; | |
286 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; | |
287 | cmd.num_disc_configs++; | |
288 | } | |
289 | ||
772dccf4 JL |
290 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) && |
291 | (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) { | |
292 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = | |
293 | NCI_NFC_A_PASSIVE_LISTEN_MODE; | |
294 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; | |
295 | cmd.num_disc_configs++; | |
296 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = | |
297 | NCI_NFC_F_PASSIVE_LISTEN_MODE; | |
298 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; | |
299 | cmd.num_disc_configs++; | |
300 | } | |
301 | ||
6a2968aa | 302 | nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD, |
eb9bc6e9 SO |
303 | (1 + (cmd.num_disc_configs * sizeof(struct disc_config))), |
304 | &cmd); | |
6a2968aa IE |
305 | } |
306 | ||
019c4fba IE |
307 | struct nci_rf_discover_select_param { |
308 | __u8 rf_discovery_id; | |
309 | __u8 rf_protocol; | |
310 | }; | |
311 | ||
312 | static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt) | |
313 | { | |
314 | struct nci_rf_discover_select_param *param = | |
eb9bc6e9 | 315 | (struct nci_rf_discover_select_param *)opt; |
019c4fba IE |
316 | struct nci_rf_discover_select_cmd cmd; |
317 | ||
318 | cmd.rf_discovery_id = param->rf_discovery_id; | |
319 | cmd.rf_protocol = param->rf_protocol; | |
320 | ||
321 | switch (cmd.rf_protocol) { | |
322 | case NCI_RF_PROTOCOL_ISO_DEP: | |
323 | cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP; | |
324 | break; | |
325 | ||
326 | case NCI_RF_PROTOCOL_NFC_DEP: | |
327 | cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP; | |
328 | break; | |
329 | ||
330 | default: | |
331 | cmd.rf_interface = NCI_RF_INTERFACE_FRAME; | |
332 | break; | |
333 | } | |
334 | ||
335 | nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD, | |
eb9bc6e9 | 336 | sizeof(struct nci_rf_discover_select_cmd), &cmd); |
019c4fba IE |
337 | } |
338 | ||
6a2968aa IE |
339 | static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt) |
340 | { | |
341 | struct nci_rf_deactivate_cmd cmd; | |
342 | ||
9295b5b5 | 343 | cmd.type = opt; |
6a2968aa IE |
344 | |
345 | nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD, | |
eb9bc6e9 | 346 | sizeof(struct nci_rf_deactivate_cmd), &cmd); |
6a2968aa IE |
347 | } |
348 | ||
7bc4824e | 349 | struct nci_cmd_param { |
759afb8d CR |
350 | __u16 opcode; |
351 | size_t len; | |
352 | __u8 *payload; | |
353 | }; | |
354 | ||
7bc4824e | 355 | static void nci_generic_req(struct nci_dev *ndev, unsigned long opt) |
759afb8d | 356 | { |
7bc4824e RD |
357 | struct nci_cmd_param *param = |
358 | (struct nci_cmd_param *)opt; | |
759afb8d CR |
359 | |
360 | nci_send_cmd(ndev, param->opcode, param->len, param->payload); | |
361 | } | |
362 | ||
363 | int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload) | |
364 | { | |
7bc4824e | 365 | struct nci_cmd_param param; |
759afb8d CR |
366 | |
367 | param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid); | |
368 | param.len = len; | |
369 | param.payload = payload; | |
370 | ||
7bc4824e | 371 | return __nci_request(ndev, nci_generic_req, (unsigned long)¶m, |
759afb8d CR |
372 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
373 | } | |
374 | EXPORT_SYMBOL(nci_prop_cmd); | |
375 | ||
7bc4824e RD |
376 | int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload) |
377 | { | |
378 | struct nci_cmd_param param; | |
379 | ||
380 | param.opcode = opcode; | |
381 | param.len = len; | |
382 | param.payload = payload; | |
383 | ||
384 | return __nci_request(ndev, nci_generic_req, (unsigned long)¶m, | |
385 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
386 | } | |
387 | EXPORT_SYMBOL(nci_core_cmd); | |
388 | ||
025a0cb8 RB |
389 | int nci_core_reset(struct nci_dev *ndev) |
390 | { | |
391 | return __nci_request(ndev, nci_reset_req, 0, | |
392 | msecs_to_jiffies(NCI_RESET_TIMEOUT)); | |
393 | } | |
394 | EXPORT_SYMBOL(nci_core_reset); | |
395 | ||
396 | int nci_core_init(struct nci_dev *ndev) | |
397 | { | |
398 | return __nci_request(ndev, nci_init_req, 0, | |
399 | msecs_to_jiffies(NCI_INIT_TIMEOUT)); | |
400 | } | |
401 | EXPORT_SYMBOL(nci_core_init); | |
402 | ||
1c53855f CR |
403 | struct nci_loopback_data { |
404 | u8 conn_id; | |
405 | struct sk_buff *data; | |
406 | }; | |
407 | ||
408 | static void nci_send_data_req(struct nci_dev *ndev, unsigned long opt) | |
409 | { | |
410 | struct nci_loopback_data *data = (struct nci_loopback_data *)opt; | |
411 | ||
412 | nci_send_data(ndev, data->conn_id, data->data); | |
413 | } | |
414 | ||
415 | static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err) | |
416 | { | |
417 | struct nci_dev *ndev = (struct nci_dev *)context; | |
418 | struct nci_conn_info *conn_info; | |
419 | ||
420 | conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id); | |
421 | if (!conn_info) { | |
422 | nci_req_complete(ndev, NCI_STATUS_REJECTED); | |
423 | return; | |
424 | } | |
425 | ||
426 | conn_info->rx_skb = skb; | |
427 | ||
428 | nci_req_complete(ndev, NCI_STATUS_OK); | |
429 | } | |
430 | ||
431 | int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len, | |
432 | struct sk_buff **resp) | |
433 | { | |
434 | int r; | |
435 | struct nci_loopback_data loopback_data; | |
436 | struct nci_conn_info *conn_info; | |
437 | struct sk_buff *skb; | |
438 | int conn_id = nci_get_conn_info_by_dest_type_params(ndev, | |
439 | NCI_DESTINATION_NFCC_LOOPBACK, NULL); | |
440 | ||
441 | if (conn_id < 0) { | |
442 | r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK, | |
443 | 0, 0, NULL); | |
444 | if (r != NCI_STATUS_OK) | |
445 | return r; | |
446 | ||
447 | conn_id = nci_get_conn_info_by_dest_type_params(ndev, | |
448 | NCI_DESTINATION_NFCC_LOOPBACK, | |
449 | NULL); | |
450 | } | |
451 | ||
452 | conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id); | |
453 | if (!conn_info) | |
454 | return -EPROTO; | |
455 | ||
456 | /* store cb and context to be used on receiving data */ | |
457 | conn_info->data_exchange_cb = nci_nfcc_loopback_cb; | |
458 | conn_info->data_exchange_cb_context = ndev; | |
459 | ||
460 | skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL); | |
461 | if (!skb) | |
462 | return -ENOMEM; | |
463 | ||
464 | skb_reserve(skb, NCI_DATA_HDR_SIZE); | |
465 | memcpy(skb_put(skb, data_len), data, data_len); | |
466 | ||
467 | loopback_data.conn_id = conn_id; | |
468 | loopback_data.data = skb; | |
469 | ||
470 | ndev->cur_conn_id = conn_id; | |
471 | r = nci_request(ndev, nci_send_data_req, (unsigned long)&loopback_data, | |
472 | msecs_to_jiffies(NCI_DATA_TIMEOUT)); | |
473 | if (r == NCI_STATUS_OK && resp) | |
474 | *resp = conn_info->rx_skb; | |
475 | ||
476 | return r; | |
477 | } | |
478 | EXPORT_SYMBOL(nci_nfcc_loopback); | |
479 | ||
6a2968aa IE |
480 | static int nci_open_device(struct nci_dev *ndev) |
481 | { | |
482 | int rc = 0; | |
483 | ||
484 | mutex_lock(&ndev->req_lock); | |
485 | ||
486 | if (test_bit(NCI_UP, &ndev->flags)) { | |
487 | rc = -EALREADY; | |
488 | goto done; | |
489 | } | |
490 | ||
491 | if (ndev->ops->open(ndev)) { | |
492 | rc = -EIO; | |
493 | goto done; | |
494 | } | |
495 | ||
496 | atomic_set(&ndev->cmd_cnt, 1); | |
497 | ||
498 | set_bit(NCI_INIT, &ndev->flags); | |
499 | ||
c39daeee CR |
500 | if (ndev->ops->init) |
501 | rc = ndev->ops->init(ndev); | |
502 | ||
503 | if (!rc) { | |
504 | rc = __nci_request(ndev, nci_reset_req, 0, | |
505 | msecs_to_jiffies(NCI_RESET_TIMEOUT)); | |
506 | } | |
6a2968aa | 507 | |
81859ab8 CR |
508 | if (!rc && ndev->ops->setup) { |
509 | rc = ndev->ops->setup(ndev); | |
510 | } | |
86e8586e | 511 | |
6a2968aa IE |
512 | if (!rc) { |
513 | rc = __nci_request(ndev, nci_init_req, 0, | |
eb9bc6e9 | 514 | msecs_to_jiffies(NCI_INIT_TIMEOUT)); |
6a2968aa IE |
515 | } |
516 | ||
e4dbd625 | 517 | if (!rc && ndev->ops->post_setup) |
fdf79bd4 | 518 | rc = ndev->ops->post_setup(ndev); |
fdf79bd4 | 519 | |
6a2968aa IE |
520 | if (!rc) { |
521 | rc = __nci_request(ndev, nci_init_complete_req, 0, | |
eb9bc6e9 | 522 | msecs_to_jiffies(NCI_INIT_TIMEOUT)); |
6a2968aa IE |
523 | } |
524 | ||
525 | clear_bit(NCI_INIT, &ndev->flags); | |
526 | ||
527 | if (!rc) { | |
528 | set_bit(NCI_UP, &ndev->flags); | |
019c4fba | 529 | nci_clear_target_list(ndev); |
8939e47f | 530 | atomic_set(&ndev->state, NCI_IDLE); |
6a2968aa IE |
531 | } else { |
532 | /* Init failed, cleanup */ | |
533 | skb_queue_purge(&ndev->cmd_q); | |
534 | skb_queue_purge(&ndev->rx_q); | |
535 | skb_queue_purge(&ndev->tx_q); | |
536 | ||
537 | ndev->ops->close(ndev); | |
538 | ndev->flags = 0; | |
539 | } | |
540 | ||
541 | done: | |
542 | mutex_unlock(&ndev->req_lock); | |
543 | return rc; | |
544 | } | |
545 | ||
546 | static int nci_close_device(struct nci_dev *ndev) | |
547 | { | |
548 | nci_req_cancel(ndev, ENODEV); | |
549 | mutex_lock(&ndev->req_lock); | |
550 | ||
551 | if (!test_and_clear_bit(NCI_UP, &ndev->flags)) { | |
552 | del_timer_sync(&ndev->cmd_timer); | |
c4bf98b2 | 553 | del_timer_sync(&ndev->data_timer); |
6a2968aa IE |
554 | mutex_unlock(&ndev->req_lock); |
555 | return 0; | |
556 | } | |
557 | ||
558 | /* Drop RX and TX queues */ | |
559 | skb_queue_purge(&ndev->rx_q); | |
560 | skb_queue_purge(&ndev->tx_q); | |
561 | ||
562 | /* Flush RX and TX wq */ | |
563 | flush_workqueue(ndev->rx_wq); | |
564 | flush_workqueue(ndev->tx_wq); | |
565 | ||
566 | /* Reset device */ | |
567 | skb_queue_purge(&ndev->cmd_q); | |
568 | atomic_set(&ndev->cmd_cnt, 1); | |
569 | ||
570 | set_bit(NCI_INIT, &ndev->flags); | |
571 | __nci_request(ndev, nci_reset_req, 0, | |
eb9bc6e9 | 572 | msecs_to_jiffies(NCI_RESET_TIMEOUT)); |
0e70cba7 CR |
573 | |
574 | /* After this point our queues are empty | |
575 | * and no works are scheduled. | |
576 | */ | |
577 | ndev->ops->close(ndev); | |
578 | ||
6a2968aa IE |
579 | clear_bit(NCI_INIT, &ndev->flags); |
580 | ||
fa9be5f0 AK |
581 | del_timer_sync(&ndev->cmd_timer); |
582 | ||
6a2968aa IE |
583 | /* Flush cmd wq */ |
584 | flush_workqueue(ndev->cmd_wq); | |
585 | ||
6a2968aa IE |
586 | /* Clear flags */ |
587 | ndev->flags = 0; | |
588 | ||
589 | mutex_unlock(&ndev->req_lock); | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | /* NCI command timer function */ | |
595 | static void nci_cmd_timer(unsigned long arg) | |
596 | { | |
597 | struct nci_dev *ndev = (void *) arg; | |
598 | ||
6a2968aa IE |
599 | atomic_set(&ndev->cmd_cnt, 1); |
600 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
601 | } | |
602 | ||
c4bf98b2 IE |
603 | /* NCI data exchange timer function */ |
604 | static void nci_data_timer(unsigned long arg) | |
605 | { | |
606 | struct nci_dev *ndev = (void *) arg; | |
607 | ||
608 | set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); | |
609 | queue_work(ndev->rx_wq, &ndev->rx_work); | |
610 | } | |
611 | ||
6a2968aa IE |
612 | static int nci_dev_up(struct nfc_dev *nfc_dev) |
613 | { | |
614 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
615 | ||
6a2968aa IE |
616 | return nci_open_device(ndev); |
617 | } | |
618 | ||
619 | static int nci_dev_down(struct nfc_dev *nfc_dev) | |
620 | { | |
621 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
622 | ||
6a2968aa IE |
623 | return nci_close_device(ndev); |
624 | } | |
625 | ||
22c15bf3 AK |
626 | int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val) |
627 | { | |
628 | struct nci_set_config_param param; | |
629 | ||
630 | if (!val || !len) | |
631 | return 0; | |
632 | ||
633 | param.id = id; | |
634 | param.len = len; | |
635 | param.val = val; | |
636 | ||
637 | return __nci_request(ndev, nci_set_config_req, (unsigned long)¶m, | |
638 | msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); | |
639 | } | |
640 | EXPORT_SYMBOL(nci_set_config); | |
641 | ||
af9c8aa6 CR |
642 | static void nci_nfcee_discover_req(struct nci_dev *ndev, unsigned long opt) |
643 | { | |
644 | struct nci_nfcee_discover_cmd cmd; | |
645 | __u8 action = opt; | |
646 | ||
647 | cmd.discovery_action = action; | |
648 | ||
649 | nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd); | |
650 | } | |
651 | ||
652 | int nci_nfcee_discover(struct nci_dev *ndev, u8 action) | |
653 | { | |
21d19f87 | 654 | return __nci_request(ndev, nci_nfcee_discover_req, action, |
af9c8aa6 CR |
655 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
656 | } | |
657 | EXPORT_SYMBOL(nci_nfcee_discover); | |
658 | ||
f7f793f3 CR |
659 | static void nci_nfcee_mode_set_req(struct nci_dev *ndev, unsigned long opt) |
660 | { | |
661 | struct nci_nfcee_mode_set_cmd *cmd = | |
662 | (struct nci_nfcee_mode_set_cmd *)opt; | |
663 | ||
664 | nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD, | |
665 | sizeof(struct nci_nfcee_mode_set_cmd), cmd); | |
666 | } | |
667 | ||
668 | int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode) | |
669 | { | |
670 | struct nci_nfcee_mode_set_cmd cmd; | |
671 | ||
672 | cmd.nfcee_id = nfcee_id; | |
673 | cmd.nfcee_mode = nfcee_mode; | |
674 | ||
21d19f87 SO |
675 | return __nci_request(ndev, nci_nfcee_mode_set_req, |
676 | (unsigned long)&cmd, | |
677 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
f7f793f3 CR |
678 | } |
679 | EXPORT_SYMBOL(nci_nfcee_mode_set); | |
680 | ||
736bb957 CR |
681 | static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt) |
682 | { | |
b16ae716 CR |
683 | struct core_conn_create_data *data = |
684 | (struct core_conn_create_data *)opt; | |
685 | ||
686 | nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd); | |
736bb957 CR |
687 | } |
688 | ||
b16ae716 CR |
689 | int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type, |
690 | u8 number_destination_params, | |
691 | size_t params_len, | |
736bb957 CR |
692 | struct core_conn_create_dest_spec_params *params) |
693 | { | |
b16ae716 CR |
694 | int r; |
695 | struct nci_core_conn_create_cmd *cmd; | |
696 | struct core_conn_create_data data; | |
697 | ||
698 | data.length = params_len + sizeof(struct nci_core_conn_create_cmd); | |
699 | cmd = kzalloc(data.length, GFP_KERNEL); | |
700 | if (!cmd) | |
701 | return -ENOMEM; | |
702 | ||
703 | cmd->destination_type = destination_type; | |
704 | cmd->number_destination_params = number_destination_params; | |
b16ae716 CR |
705 | |
706 | data.cmd = cmd; | |
caa575a8 | 707 | |
18836029 CR |
708 | if (params) { |
709 | memcpy(cmd->params, params, params_len); | |
710 | if (params->length > 0) | |
9b8d1a4c CR |
711 | memcpy(&ndev->cur_params, |
712 | ¶ms->value[DEST_SPEC_PARAMS_ID_INDEX], | |
713 | sizeof(struct dest_spec_params)); | |
18836029 | 714 | else |
9b8d1a4c | 715 | ndev->cur_params.id = 0; |
18836029 | 716 | } else { |
9b8d1a4c | 717 | ndev->cur_params.id = 0; |
18836029 | 718 | } |
9b8d1a4c | 719 | ndev->cur_dest_type = destination_type; |
b16ae716 | 720 | |
18836029 | 721 | r = __nci_request(ndev, nci_core_conn_create_req, (unsigned long)&data, |
b16ae716 CR |
722 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
723 | kfree(cmd); | |
724 | return r; | |
736bb957 CR |
725 | } |
726 | EXPORT_SYMBOL(nci_core_conn_create); | |
727 | ||
728 | static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt) | |
729 | { | |
730 | __u8 conn_id = opt; | |
731 | ||
732 | nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id); | |
733 | } | |
734 | ||
735 | int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id) | |
736 | { | |
de5ea851 | 737 | ndev->cur_conn_id = conn_id; |
21d19f87 SO |
738 | return __nci_request(ndev, nci_core_conn_close_req, conn_id, |
739 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
736bb957 CR |
740 | } |
741 | EXPORT_SYMBOL(nci_core_conn_close); | |
742 | ||
7e035230 IE |
743 | static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev) |
744 | { | |
745 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
746 | struct nci_set_config_param param; | |
529ee066 | 747 | int rc; |
7e035230 IE |
748 | |
749 | param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len); | |
750 | if ((param.val == NULL) || (param.len == 0)) | |
f9fc36f4 | 751 | return 0; |
7e035230 | 752 | |
460d8f97 | 753 | if (param.len > NFC_MAX_GT_LEN) |
7e035230 IE |
754 | return -EINVAL; |
755 | ||
7e035230 | 756 | param.id = NCI_PN_ATR_REQ_GEN_BYTES; |
7e035230 | 757 | |
529ee066 JL |
758 | rc = nci_request(ndev, nci_set_config_req, (unsigned long)¶m, |
759 | msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); | |
760 | if (rc) | |
761 | return rc; | |
762 | ||
763 | param.id = NCI_LN_ATR_RES_GEN_BYTES; | |
764 | ||
f9fc36f4 SJ |
765 | return nci_request(ndev, nci_set_config_req, (unsigned long)¶m, |
766 | msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); | |
7e035230 IE |
767 | } |
768 | ||
90d78c13 JL |
769 | static int nci_set_listen_parameters(struct nfc_dev *nfc_dev) |
770 | { | |
771 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
772 | int rc; | |
773 | __u8 val; | |
774 | ||
775 | val = NCI_LA_SEL_INFO_NFC_DEP_MASK; | |
776 | ||
777 | rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val); | |
778 | if (rc) | |
779 | return rc; | |
780 | ||
781 | val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK; | |
782 | ||
783 | rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val); | |
784 | if (rc) | |
785 | return rc; | |
786 | ||
787 | val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424; | |
788 | ||
789 | return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val); | |
790 | } | |
791 | ||
fe7c5800 SO |
792 | static int nci_start_poll(struct nfc_dev *nfc_dev, |
793 | __u32 im_protocols, __u32 tm_protocols) | |
6a2968aa IE |
794 | { |
795 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
772dccf4 | 796 | struct nci_rf_discover_param param; |
6a2968aa IE |
797 | int rc; |
798 | ||
019c4fba | 799 | if ((atomic_read(&ndev->state) == NCI_DISCOVERY) || |
eb9bc6e9 | 800 | (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) { |
ed1e0ad8 | 801 | pr_err("unable to start poll, since poll is already active\n"); |
6a2968aa IE |
802 | return -EBUSY; |
803 | } | |
804 | ||
de054799 | 805 | if (ndev->target_active_prot) { |
ed1e0ad8 | 806 | pr_err("there is an active target\n"); |
de054799 IE |
807 | return -EBUSY; |
808 | } | |
809 | ||
019c4fba | 810 | if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) || |
eb9bc6e9 | 811 | (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) { |
019c4fba | 812 | pr_debug("target active or w4 select, implicitly deactivate\n"); |
6a2968aa | 813 | |
9295b5b5 CR |
814 | rc = nci_request(ndev, nci_rf_deactivate_req, |
815 | NCI_DEACTIVATE_TYPE_IDLE_MODE, | |
eb9bc6e9 | 816 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
817 | if (rc) |
818 | return -EBUSY; | |
819 | } | |
820 | ||
529ee066 | 821 | if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) { |
7e035230 IE |
822 | rc = nci_set_local_general_bytes(nfc_dev); |
823 | if (rc) { | |
824 | pr_err("failed to set local general bytes\n"); | |
825 | return rc; | |
826 | } | |
827 | } | |
828 | ||
90d78c13 JL |
829 | if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { |
830 | rc = nci_set_listen_parameters(nfc_dev); | |
831 | if (rc) | |
832 | pr_err("failed to set listen parameters\n"); | |
833 | } | |
834 | ||
772dccf4 JL |
835 | param.im_protocols = im_protocols; |
836 | param.tm_protocols = tm_protocols; | |
837 | rc = nci_request(ndev, nci_rf_discover_req, (unsigned long)¶m, | |
eb9bc6e9 | 838 | msecs_to_jiffies(NCI_RF_DISC_TIMEOUT)); |
6a2968aa IE |
839 | |
840 | if (!rc) | |
fe7c5800 | 841 | ndev->poll_prots = im_protocols; |
6a2968aa IE |
842 | |
843 | return rc; | |
844 | } | |
845 | ||
846 | static void nci_stop_poll(struct nfc_dev *nfc_dev) | |
847 | { | |
848 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
849 | ||
019c4fba | 850 | if ((atomic_read(&ndev->state) != NCI_DISCOVERY) && |
eb9bc6e9 | 851 | (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) { |
ed1e0ad8 | 852 | pr_err("unable to stop poll, since poll is not active\n"); |
6a2968aa IE |
853 | return; |
854 | } | |
855 | ||
9295b5b5 | 856 | nci_request(ndev, nci_rf_deactivate_req, NCI_DEACTIVATE_TYPE_IDLE_MODE, |
eb9bc6e9 | 857 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
858 | } |
859 | ||
90099433 EL |
860 | static int nci_activate_target(struct nfc_dev *nfc_dev, |
861 | struct nfc_target *target, __u32 protocol) | |
6a2968aa IE |
862 | { |
863 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
019c4fba | 864 | struct nci_rf_discover_select_param param; |
90099433 | 865 | struct nfc_target *nci_target = NULL; |
019c4fba IE |
866 | int i; |
867 | int rc = 0; | |
6a2968aa | 868 | |
90099433 | 869 | pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol); |
6a2968aa | 870 | |
019c4fba | 871 | if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) && |
eb9bc6e9 | 872 | (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) { |
ed1e0ad8 | 873 | pr_err("there is no available target to activate\n"); |
6a2968aa IE |
874 | return -EINVAL; |
875 | } | |
876 | ||
877 | if (ndev->target_active_prot) { | |
ed1e0ad8 | 878 | pr_err("there is already an active target\n"); |
6a2968aa IE |
879 | return -EBUSY; |
880 | } | |
881 | ||
019c4fba | 882 | for (i = 0; i < ndev->n_targets; i++) { |
90099433 EL |
883 | if (ndev->targets[i].idx == target->idx) { |
884 | nci_target = &ndev->targets[i]; | |
019c4fba IE |
885 | break; |
886 | } | |
887 | } | |
888 | ||
90099433 | 889 | if (!nci_target) { |
019c4fba IE |
890 | pr_err("unable to find the selected target\n"); |
891 | return -EINVAL; | |
892 | } | |
893 | ||
90099433 | 894 | if (!(nci_target->supported_protocols & (1 << protocol))) { |
ed1e0ad8 JP |
895 | pr_err("target does not support the requested protocol 0x%x\n", |
896 | protocol); | |
6a2968aa IE |
897 | return -EINVAL; |
898 | } | |
899 | ||
019c4fba | 900 | if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) { |
90099433 | 901 | param.rf_discovery_id = nci_target->logical_idx; |
019c4fba IE |
902 | |
903 | if (protocol == NFC_PROTO_JEWEL) | |
904 | param.rf_protocol = NCI_RF_PROTOCOL_T1T; | |
905 | else if (protocol == NFC_PROTO_MIFARE) | |
906 | param.rf_protocol = NCI_RF_PROTOCOL_T2T; | |
907 | else if (protocol == NFC_PROTO_FELICA) | |
908 | param.rf_protocol = NCI_RF_PROTOCOL_T3T; | |
01d719a2 SO |
909 | else if (protocol == NFC_PROTO_ISO14443 || |
910 | protocol == NFC_PROTO_ISO14443_B) | |
019c4fba IE |
911 | param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP; |
912 | else | |
913 | param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP; | |
914 | ||
915 | rc = nci_request(ndev, nci_rf_discover_select_req, | |
eb9bc6e9 SO |
916 | (unsigned long)¶m, |
917 | msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT)); | |
019c4fba | 918 | } |
6a2968aa | 919 | |
019c4fba IE |
920 | if (!rc) |
921 | ndev->target_active_prot = protocol; | |
922 | ||
923 | return rc; | |
6a2968aa IE |
924 | } |
925 | ||
90099433 | 926 | static void nci_deactivate_target(struct nfc_dev *nfc_dev, |
96d4581f CR |
927 | struct nfc_target *target, |
928 | __u8 mode) | |
6a2968aa IE |
929 | { |
930 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
96d4581f | 931 | u8 nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE; |
6a2968aa | 932 | |
767f19ae | 933 | pr_debug("entry\n"); |
6a2968aa IE |
934 | |
935 | if (!ndev->target_active_prot) { | |
ed1e0ad8 | 936 | pr_err("unable to deactivate target, no active target\n"); |
6a2968aa IE |
937 | return; |
938 | } | |
939 | ||
940 | ndev->target_active_prot = 0; | |
941 | ||
96d4581f CR |
942 | switch (mode) { |
943 | case NFC_TARGET_MODE_SLEEP: | |
944 | nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE; | |
945 | break; | |
946 | } | |
947 | ||
8939e47f | 948 | if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) { |
96d4581f | 949 | nci_request(ndev, nci_rf_deactivate_req, nci_mode, |
eb9bc6e9 | 950 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
951 | } |
952 | } | |
953 | ||
767f19ae IE |
954 | static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, |
955 | __u8 comm_mode, __u8 *gb, size_t gb_len) | |
956 | { | |
957 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
958 | int rc; | |
959 | ||
960 | pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode); | |
961 | ||
962 | rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP); | |
963 | if (rc) | |
964 | return rc; | |
965 | ||
966 | rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb, | |
967 | ndev->remote_gb_len); | |
968 | if (!rc) | |
969 | rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE, | |
970 | NFC_RF_INITIATOR); | |
971 | ||
972 | return rc; | |
973 | } | |
974 | ||
975 | static int nci_dep_link_down(struct nfc_dev *nfc_dev) | |
976 | { | |
d7979e13 JL |
977 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
978 | int rc; | |
979 | ||
767f19ae IE |
980 | pr_debug("entry\n"); |
981 | ||
d7979e13 | 982 | if (nfc_dev->rf_mode == NFC_RF_INITIATOR) { |
96d4581f | 983 | nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE); |
d7979e13 JL |
984 | } else { |
985 | if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE || | |
986 | atomic_read(&ndev->state) == NCI_DISCOVERY) { | |
987 | nci_request(ndev, nci_rf_deactivate_req, 0, | |
988 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); | |
989 | } | |
990 | ||
991 | rc = nfc_tm_deactivated(nfc_dev); | |
992 | if (rc) | |
993 | pr_err("error when signaling tm deactivation\n"); | |
994 | } | |
767f19ae IE |
995 | |
996 | return 0; | |
997 | } | |
998 | ||
999 | ||
be9ae4ce SO |
1000 | static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, |
1001 | struct sk_buff *skb, | |
1002 | data_exchange_cb_t cb, void *cb_context) | |
6a2968aa IE |
1003 | { |
1004 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
38f04c6b | 1005 | int rc; |
4aeee687 CR |
1006 | struct nci_conn_info *conn_info; |
1007 | ||
12bdf27d | 1008 | conn_info = ndev->rf_conn_info; |
4aeee687 CR |
1009 | if (!conn_info) |
1010 | return -EPROTO; | |
6a2968aa | 1011 | |
90099433 | 1012 | pr_debug("target_idx %d, len %d\n", target->idx, skb->len); |
6a2968aa IE |
1013 | |
1014 | if (!ndev->target_active_prot) { | |
ed1e0ad8 | 1015 | pr_err("unable to exchange data, no active target\n"); |
6a2968aa IE |
1016 | return -EINVAL; |
1017 | } | |
1018 | ||
38f04c6b IE |
1019 | if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags)) |
1020 | return -EBUSY; | |
1021 | ||
6a2968aa | 1022 | /* store cb and context to be used on receiving data */ |
4aeee687 CR |
1023 | conn_info->data_exchange_cb = cb; |
1024 | conn_info->data_exchange_cb_context = cb_context; | |
6a2968aa | 1025 | |
e8c0dacd | 1026 | rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb); |
38f04c6b IE |
1027 | if (rc) |
1028 | clear_bit(NCI_DATA_EXCHANGE, &ndev->flags); | |
1029 | ||
1030 | return rc; | |
6a2968aa IE |
1031 | } |
1032 | ||
485f442f JL |
1033 | static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) |
1034 | { | |
1035 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
1036 | int rc; | |
1037 | ||
1038 | rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb); | |
1039 | if (rc) | |
1040 | pr_err("unable to send data\n"); | |
1041 | ||
1042 | return rc; | |
1043 | } | |
1044 | ||
0a946301 SO |
1045 | static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx) |
1046 | { | |
93bca2bf CR |
1047 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
1048 | ||
1049 | if (ndev->ops->enable_se) | |
1050 | return ndev->ops->enable_se(ndev, se_idx); | |
1051 | ||
0a946301 SO |
1052 | return 0; |
1053 | } | |
1054 | ||
1055 | static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx) | |
1056 | { | |
e9ef9431 CR |
1057 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
1058 | ||
1059 | if (ndev->ops->disable_se) | |
1060 | return ndev->ops->disable_se(ndev, se_idx); | |
1061 | ||
0a946301 SO |
1062 | return 0; |
1063 | } | |
1064 | ||
1065 | static int nci_discover_se(struct nfc_dev *nfc_dev) | |
1066 | { | |
fa00e8fe | 1067 | int r; |
ba4db551 CR |
1068 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
1069 | ||
fa00e8fe CR |
1070 | if (ndev->ops->discover_se) { |
1071 | r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE); | |
1072 | if (r != NCI_STATUS_OK) | |
1073 | return -EPROTO; | |
1074 | ||
ba4db551 | 1075 | return ndev->ops->discover_se(ndev); |
fa00e8fe | 1076 | } |
ba4db551 | 1077 | |
0a946301 SO |
1078 | return 0; |
1079 | } | |
1080 | ||
a688bf55 CR |
1081 | static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx, |
1082 | u8 *apdu, size_t apdu_length, | |
1083 | se_io_cb_t cb, void *cb_context) | |
1084 | { | |
1085 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
1086 | ||
1087 | if (ndev->ops->se_io) | |
1088 | return ndev->ops->se_io(ndev, se_idx, apdu, | |
1089 | apdu_length, cb, cb_context); | |
1090 | ||
1091 | return 0; | |
1092 | } | |
1093 | ||
25af01ed CP |
1094 | static int nci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name) |
1095 | { | |
1096 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
1097 | ||
1098 | if (!ndev->ops->fw_download) | |
1099 | return -ENOTSUPP; | |
1100 | ||
1101 | return ndev->ops->fw_download(ndev, firmware_name); | |
1102 | } | |
1103 | ||
6a2968aa IE |
1104 | static struct nfc_ops nci_nfc_ops = { |
1105 | .dev_up = nci_dev_up, | |
1106 | .dev_down = nci_dev_down, | |
1107 | .start_poll = nci_start_poll, | |
1108 | .stop_poll = nci_stop_poll, | |
767f19ae IE |
1109 | .dep_link_up = nci_dep_link_up, |
1110 | .dep_link_down = nci_dep_link_down, | |
6a2968aa IE |
1111 | .activate_target = nci_activate_target, |
1112 | .deactivate_target = nci_deactivate_target, | |
be9ae4ce | 1113 | .im_transceive = nci_transceive, |
485f442f | 1114 | .tm_send = nci_tm_send, |
0a946301 SO |
1115 | .enable_se = nci_enable_se, |
1116 | .disable_se = nci_disable_se, | |
1117 | .discover_se = nci_discover_se, | |
a688bf55 | 1118 | .se_io = nci_se_io, |
25af01ed | 1119 | .fw_download = nci_fw_download, |
6a2968aa IE |
1120 | }; |
1121 | ||
1122 | /* ---- Interface to NCI drivers ---- */ | |
6a2968aa IE |
1123 | /** |
1124 | * nci_allocate_device - allocate a new nci device | |
1125 | * | |
1126 | * @ops: device operations | |
1127 | * @supported_protocols: NFC protocols supported by the device | |
1128 | */ | |
1129 | struct nci_dev *nci_allocate_device(struct nci_ops *ops, | |
eb9bc6e9 SO |
1130 | __u32 supported_protocols, |
1131 | int tx_headroom, int tx_tailroom) | |
6a2968aa | 1132 | { |
8ebafde0 | 1133 | struct nci_dev *ndev; |
6a2968aa | 1134 | |
24bf3304 | 1135 | pr_debug("supported_protocols 0x%x\n", supported_protocols); |
6a2968aa IE |
1136 | |
1137 | if (!ops->open || !ops->close || !ops->send) | |
8ebafde0 | 1138 | return NULL; |
6a2968aa IE |
1139 | |
1140 | if (!supported_protocols) | |
8ebafde0 | 1141 | return NULL; |
6a2968aa IE |
1142 | |
1143 | ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL); | |
1144 | if (!ndev) | |
8ebafde0 | 1145 | return NULL; |
6a2968aa IE |
1146 | |
1147 | ndev->ops = ops; | |
b6355e97 SO |
1148 | |
1149 | if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) { | |
1150 | pr_err("Too many proprietary commands: %zd\n", | |
1151 | ops->n_prop_ops); | |
1152 | ops->prop_ops = NULL; | |
1153 | ops->n_prop_ops = 0; | |
1154 | } | |
1155 | ||
6a2968aa IE |
1156 | ndev->tx_headroom = tx_headroom; |
1157 | ndev->tx_tailroom = tx_tailroom; | |
9bec44bf | 1158 | init_completion(&ndev->req_completion); |
6a2968aa IE |
1159 | |
1160 | ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops, | |
eb9bc6e9 SO |
1161 | supported_protocols, |
1162 | tx_headroom + NCI_DATA_HDR_SIZE, | |
1163 | tx_tailroom); | |
6a2968aa | 1164 | if (!ndev->nfc_dev) |
11f54f22 CR |
1165 | goto free_nci; |
1166 | ||
1167 | ndev->hci_dev = nci_hci_allocate(ndev); | |
1168 | if (!ndev->hci_dev) | |
1169 | goto free_nfc; | |
6a2968aa IE |
1170 | |
1171 | nfc_set_drvdata(ndev->nfc_dev, ndev); | |
1172 | ||
8ebafde0 | 1173 | return ndev; |
6a2968aa | 1174 | |
11f54f22 CR |
1175 | free_nfc: |
1176 | kfree(ndev->nfc_dev); | |
1177 | ||
1178 | free_nci: | |
6a2968aa | 1179 | kfree(ndev); |
8ebafde0 | 1180 | return NULL; |
6a2968aa IE |
1181 | } |
1182 | EXPORT_SYMBOL(nci_allocate_device); | |
1183 | ||
1184 | /** | |
1185 | * nci_free_device - deallocate nci device | |
1186 | * | |
1187 | * @ndev: The nci device to deallocate | |
1188 | */ | |
1189 | void nci_free_device(struct nci_dev *ndev) | |
1190 | { | |
6a2968aa IE |
1191 | nfc_free_device(ndev->nfc_dev); |
1192 | kfree(ndev); | |
1193 | } | |
1194 | EXPORT_SYMBOL(nci_free_device); | |
1195 | ||
1196 | /** | |
1197 | * nci_register_device - register a nci device in the nfc subsystem | |
1198 | * | |
1199 | * @dev: The nci device to register | |
1200 | */ | |
1201 | int nci_register_device(struct nci_dev *ndev) | |
1202 | { | |
1203 | int rc; | |
1204 | struct device *dev = &ndev->nfc_dev->dev; | |
1205 | char name[32]; | |
1206 | ||
6a2968aa IE |
1207 | ndev->flags = 0; |
1208 | ||
1209 | INIT_WORK(&ndev->cmd_work, nci_cmd_work); | |
1210 | snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev)); | |
1211 | ndev->cmd_wq = create_singlethread_workqueue(name); | |
1212 | if (!ndev->cmd_wq) { | |
1213 | rc = -ENOMEM; | |
3c1c0f5d | 1214 | goto exit; |
6a2968aa IE |
1215 | } |
1216 | ||
1217 | INIT_WORK(&ndev->rx_work, nci_rx_work); | |
1218 | snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev)); | |
1219 | ndev->rx_wq = create_singlethread_workqueue(name); | |
1220 | if (!ndev->rx_wq) { | |
1221 | rc = -ENOMEM; | |
1222 | goto destroy_cmd_wq_exit; | |
1223 | } | |
1224 | ||
1225 | INIT_WORK(&ndev->tx_work, nci_tx_work); | |
1226 | snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev)); | |
1227 | ndev->tx_wq = create_singlethread_workqueue(name); | |
1228 | if (!ndev->tx_wq) { | |
1229 | rc = -ENOMEM; | |
1230 | goto destroy_rx_wq_exit; | |
1231 | } | |
1232 | ||
1233 | skb_queue_head_init(&ndev->cmd_q); | |
1234 | skb_queue_head_init(&ndev->rx_q); | |
1235 | skb_queue_head_init(&ndev->tx_q); | |
1236 | ||
1237 | setup_timer(&ndev->cmd_timer, nci_cmd_timer, | |
eb9bc6e9 | 1238 | (unsigned long) ndev); |
c4bf98b2 | 1239 | setup_timer(&ndev->data_timer, nci_data_timer, |
eb9bc6e9 | 1240 | (unsigned long) ndev); |
6a2968aa IE |
1241 | |
1242 | mutex_init(&ndev->req_lock); | |
4aeee687 | 1243 | INIT_LIST_HEAD(&ndev->conn_info_list); |
6a2968aa | 1244 | |
3c1c0f5d VC |
1245 | rc = nfc_register_device(ndev->nfc_dev); |
1246 | if (rc) | |
1247 | goto destroy_rx_wq_exit; | |
1248 | ||
6a2968aa IE |
1249 | goto exit; |
1250 | ||
1251 | destroy_rx_wq_exit: | |
1252 | destroy_workqueue(ndev->rx_wq); | |
1253 | ||
1254 | destroy_cmd_wq_exit: | |
1255 | destroy_workqueue(ndev->cmd_wq); | |
1256 | ||
6a2968aa IE |
1257 | exit: |
1258 | return rc; | |
1259 | } | |
1260 | EXPORT_SYMBOL(nci_register_device); | |
1261 | ||
1262 | /** | |
1263 | * nci_unregister_device - unregister a nci device in the nfc subsystem | |
1264 | * | |
1265 | * @dev: The nci device to unregister | |
1266 | */ | |
1267 | void nci_unregister_device(struct nci_dev *ndev) | |
1268 | { | |
4aeee687 CR |
1269 | struct nci_conn_info *conn_info, *n; |
1270 | ||
6a2968aa IE |
1271 | nci_close_device(ndev); |
1272 | ||
1273 | destroy_workqueue(ndev->cmd_wq); | |
1274 | destroy_workqueue(ndev->rx_wq); | |
1275 | destroy_workqueue(ndev->tx_wq); | |
1276 | ||
4aeee687 CR |
1277 | list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) { |
1278 | list_del(&conn_info->list); | |
1279 | /* conn_info is allocated with devm_kzalloc */ | |
1280 | } | |
1281 | ||
6a2968aa IE |
1282 | nfc_unregister_device(ndev->nfc_dev); |
1283 | } | |
1284 | EXPORT_SYMBOL(nci_unregister_device); | |
1285 | ||
1286 | /** | |
1287 | * nci_recv_frame - receive frame from NCI drivers | |
1288 | * | |
1095e69f | 1289 | * @ndev: The nci device |
6a2968aa IE |
1290 | * @skb: The sk_buff to receive |
1291 | */ | |
1095e69f | 1292 | int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb) |
6a2968aa | 1293 | { |
24bf3304 | 1294 | pr_debug("len %d\n", skb->len); |
6a2968aa | 1295 | |
874934f4 SJ |
1296 | if (!ndev || (!test_bit(NCI_UP, &ndev->flags) && |
1297 | !test_bit(NCI_INIT, &ndev->flags))) { | |
6a2968aa IE |
1298 | kfree_skb(skb); |
1299 | return -ENXIO; | |
1300 | } | |
1301 | ||
1302 | /* Queue frame for rx worker thread */ | |
1303 | skb_queue_tail(&ndev->rx_q, skb); | |
1304 | queue_work(ndev->rx_wq, &ndev->rx_work); | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | EXPORT_SYMBOL(nci_recv_frame); | |
1309 | ||
e5629d29 | 1310 | int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb) |
6a2968aa | 1311 | { |
24bf3304 | 1312 | pr_debug("len %d\n", skb->len); |
6a2968aa IE |
1313 | |
1314 | if (!ndev) { | |
1315 | kfree_skb(skb); | |
1316 | return -ENODEV; | |
1317 | } | |
1318 | ||
1319 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1320 | skb_orphan(skb); | |
1321 | ||
05158296 HT |
1322 | /* Send copy to sniffer */ |
1323 | nfc_send_to_raw_sock(ndev->nfc_dev, skb, | |
1324 | RAW_PAYLOAD_NCI, NFC_DIRECTION_TX); | |
1325 | ||
1095e69f | 1326 | return ndev->ops->send(ndev, skb); |
6a2968aa | 1327 | } |
e5629d29 | 1328 | EXPORT_SYMBOL(nci_send_frame); |
6a2968aa IE |
1329 | |
1330 | /* Send NCI command */ | |
1331 | int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload) | |
1332 | { | |
1333 | struct nci_ctrl_hdr *hdr; | |
1334 | struct sk_buff *skb; | |
1335 | ||
24bf3304 | 1336 | pr_debug("opcode 0x%x, plen %d\n", opcode, plen); |
6a2968aa IE |
1337 | |
1338 | skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL); | |
1339 | if (!skb) { | |
ed1e0ad8 | 1340 | pr_err("no memory for command\n"); |
6a2968aa IE |
1341 | return -ENOMEM; |
1342 | } | |
1343 | ||
1344 | hdr = (struct nci_ctrl_hdr *) skb_put(skb, NCI_CTRL_HDR_SIZE); | |
1345 | hdr->gid = nci_opcode_gid(opcode); | |
1346 | hdr->oid = nci_opcode_oid(opcode); | |
1347 | hdr->plen = plen; | |
1348 | ||
1349 | nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT); | |
1350 | nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST); | |
1351 | ||
1352 | if (plen) | |
1353 | memcpy(skb_put(skb, plen), payload, plen); | |
1354 | ||
6a2968aa IE |
1355 | skb_queue_tail(&ndev->cmd_q, skb); |
1356 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
1357 | ||
1358 | return 0; | |
1359 | } | |
e5629d29 | 1360 | EXPORT_SYMBOL(nci_send_cmd); |
6a2968aa | 1361 | |
b6355e97 | 1362 | /* Proprietary commands API */ |
22e4bd09 RD |
1363 | static struct nci_driver_ops *ops_cmd_lookup(struct nci_driver_ops *ops, |
1364 | size_t n_ops, | |
1365 | __u16 opcode) | |
b6355e97 SO |
1366 | { |
1367 | size_t i; | |
22e4bd09 | 1368 | struct nci_driver_ops *op; |
b6355e97 | 1369 | |
0a97a3cb | 1370 | if (!ops || !n_ops) |
b6355e97 SO |
1371 | return NULL; |
1372 | ||
0a97a3cb RD |
1373 | for (i = 0; i < n_ops; i++) { |
1374 | op = &ops[i]; | |
1375 | if (op->opcode == opcode) | |
1376 | return op; | |
b6355e97 SO |
1377 | } |
1378 | ||
1379 | return NULL; | |
1380 | } | |
1381 | ||
0a97a3cb | 1382 | static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode, |
22e4bd09 | 1383 | struct sk_buff *skb, struct nci_driver_ops *ops, |
0a97a3cb | 1384 | size_t n_ops) |
b6355e97 | 1385 | { |
22e4bd09 | 1386 | struct nci_driver_ops *op; |
b6355e97 | 1387 | |
0a97a3cb RD |
1388 | op = ops_cmd_lookup(ops, n_ops, rsp_opcode); |
1389 | if (!op || !op->rsp) | |
b6355e97 SO |
1390 | return -ENOTSUPP; |
1391 | ||
0a97a3cb | 1392 | return op->rsp(ndev, skb); |
b6355e97 SO |
1393 | } |
1394 | ||
0a97a3cb | 1395 | static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode, |
22e4bd09 | 1396 | struct sk_buff *skb, struct nci_driver_ops *ops, |
0a97a3cb | 1397 | size_t n_ops) |
b6355e97 | 1398 | { |
22e4bd09 | 1399 | struct nci_driver_ops *op; |
b6355e97 | 1400 | |
0a97a3cb RD |
1401 | op = ops_cmd_lookup(ops, n_ops, ntf_opcode); |
1402 | if (!op || !op->ntf) | |
b6355e97 SO |
1403 | return -ENOTSUPP; |
1404 | ||
0a97a3cb RD |
1405 | return op->ntf(ndev, skb); |
1406 | } | |
1407 | ||
f1163174 RD |
1408 | int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode, |
1409 | struct sk_buff *skb) | |
0a97a3cb RD |
1410 | { |
1411 | return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops, | |
1412 | ndev->ops->n_prop_ops); | |
1413 | } | |
1414 | ||
f1163174 RD |
1415 | int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode, |
1416 | struct sk_buff *skb) | |
0a97a3cb RD |
1417 | { |
1418 | return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops, | |
1419 | ndev->ops->n_prop_ops); | |
1420 | } | |
1421 | ||
f1163174 RD |
1422 | int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode, |
1423 | struct sk_buff *skb) | |
0a97a3cb RD |
1424 | { |
1425 | return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops, | |
1426 | ndev->ops->n_core_ops); | |
1427 | } | |
1428 | ||
f1163174 RD |
1429 | int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode, |
1430 | struct sk_buff *skb) | |
0a97a3cb RD |
1431 | { |
1432 | return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops, | |
1433 | ndev->ops->n_core_ops); | |
b6355e97 SO |
1434 | } |
1435 | ||
6a2968aa IE |
1436 | /* ---- NCI TX Data worker thread ---- */ |
1437 | ||
1438 | static void nci_tx_work(struct work_struct *work) | |
1439 | { | |
1440 | struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work); | |
4aeee687 | 1441 | struct nci_conn_info *conn_info; |
6a2968aa IE |
1442 | struct sk_buff *skb; |
1443 | ||
4aeee687 CR |
1444 | conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id); |
1445 | if (!conn_info) | |
1446 | return; | |
1447 | ||
1448 | pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt)); | |
6a2968aa IE |
1449 | |
1450 | /* Send queued tx data */ | |
4aeee687 | 1451 | while (atomic_read(&conn_info->credits_cnt)) { |
6a2968aa IE |
1452 | skb = skb_dequeue(&ndev->tx_q); |
1453 | if (!skb) | |
1454 | return; | |
1455 | ||
db98c829 | 1456 | /* Check if data flow control is used */ |
4aeee687 | 1457 | if (atomic_read(&conn_info->credits_cnt) != |
eb9bc6e9 | 1458 | NCI_DATA_FLOW_CONTROL_NOT_USED) |
4aeee687 | 1459 | atomic_dec(&conn_info->credits_cnt); |
6a2968aa | 1460 | |
20c239c1 JP |
1461 | pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n", |
1462 | nci_pbf(skb->data), | |
1463 | nci_conn_id(skb->data), | |
1464 | nci_plen(skb->data)); | |
6a2968aa | 1465 | |
1095e69f | 1466 | nci_send_frame(ndev, skb); |
c4bf98b2 IE |
1467 | |
1468 | mod_timer(&ndev->data_timer, | |
eb9bc6e9 | 1469 | jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT)); |
6a2968aa IE |
1470 | } |
1471 | } | |
1472 | ||
1473 | /* ----- NCI RX worker thread (data & control) ----- */ | |
1474 | ||
1475 | static void nci_rx_work(struct work_struct *work) | |
1476 | { | |
1477 | struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work); | |
1478 | struct sk_buff *skb; | |
1479 | ||
1480 | while ((skb = skb_dequeue(&ndev->rx_q))) { | |
05158296 HT |
1481 | |
1482 | /* Send copy to sniffer */ | |
1483 | nfc_send_to_raw_sock(ndev->nfc_dev, skb, | |
1484 | RAW_PAYLOAD_NCI, NFC_DIRECTION_RX); | |
1485 | ||
6a2968aa IE |
1486 | /* Process frame */ |
1487 | switch (nci_mt(skb->data)) { | |
1488 | case NCI_MT_RSP_PKT: | |
1489 | nci_rsp_packet(ndev, skb); | |
1490 | break; | |
1491 | ||
1492 | case NCI_MT_NTF_PKT: | |
1493 | nci_ntf_packet(ndev, skb); | |
1494 | break; | |
1495 | ||
1496 | case NCI_MT_DATA_PKT: | |
1497 | nci_rx_data_packet(ndev, skb); | |
1498 | break; | |
1499 | ||
1500 | default: | |
ed1e0ad8 | 1501 | pr_err("unknown MT 0x%x\n", nci_mt(skb->data)); |
6a2968aa IE |
1502 | kfree_skb(skb); |
1503 | break; | |
1504 | } | |
1505 | } | |
c4bf98b2 IE |
1506 | |
1507 | /* check if a data exchange timout has occurred */ | |
1508 | if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) { | |
1509 | /* complete the data exchange transaction, if exists */ | |
1510 | if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) | |
4aeee687 CR |
1511 | nci_data_exchange_complete(ndev, NULL, |
1512 | ndev->cur_conn_id, | |
1513 | -ETIMEDOUT); | |
c4bf98b2 IE |
1514 | |
1515 | clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); | |
1516 | } | |
6a2968aa IE |
1517 | } |
1518 | ||
1519 | /* ----- NCI TX CMD worker thread ----- */ | |
1520 | ||
1521 | static void nci_cmd_work(struct work_struct *work) | |
1522 | { | |
1523 | struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work); | |
1524 | struct sk_buff *skb; | |
1525 | ||
24bf3304 | 1526 | pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt)); |
6a2968aa IE |
1527 | |
1528 | /* Send queued command */ | |
1529 | if (atomic_read(&ndev->cmd_cnt)) { | |
1530 | skb = skb_dequeue(&ndev->cmd_q); | |
1531 | if (!skb) | |
1532 | return; | |
1533 | ||
1534 | atomic_dec(&ndev->cmd_cnt); | |
1535 | ||
20c239c1 JP |
1536 | pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", |
1537 | nci_pbf(skb->data), | |
1538 | nci_opcode_gid(nci_opcode(skb->data)), | |
1539 | nci_opcode_oid(nci_opcode(skb->data)), | |
1540 | nci_plen(skb->data)); | |
6a2968aa | 1541 | |
1095e69f | 1542 | nci_send_frame(ndev, skb); |
6a2968aa IE |
1543 | |
1544 | mod_timer(&ndev->cmd_timer, | |
eb9bc6e9 | 1545 | jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
6a2968aa IE |
1546 | } |
1547 | } | |
8a70e7f8 DJ |
1548 | |
1549 | MODULE_LICENSE("GPL"); |