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> |
6a2968aa IE |
31 | #include <linux/types.h> |
32 | #include <linux/workqueue.h> | |
33 | #include <linux/completion.h> | |
bc3b2d7f | 34 | #include <linux/export.h> |
6a2968aa IE |
35 | #include <linux/sched.h> |
36 | #include <linux/bitops.h> | |
37 | #include <linux/skbuff.h> | |
38 | ||
39 | #include "../nfc.h" | |
40 | #include <net/nfc/nci.h> | |
41 | #include <net/nfc/nci_core.h> | |
42 | #include <linux/nfc.h> | |
43 | ||
44 | static void nci_cmd_work(struct work_struct *work); | |
45 | static void nci_rx_work(struct work_struct *work); | |
46 | static void nci_tx_work(struct work_struct *work); | |
47 | ||
4aeee687 CR |
48 | struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev, |
49 | int conn_id) | |
50 | { | |
51 | struct nci_conn_info *conn_info; | |
52 | ||
53 | list_for_each_entry(conn_info, &ndev->conn_info_list, list) { | |
54 | if (conn_info->conn_id == conn_id) | |
55 | return conn_info; | |
56 | } | |
57 | ||
58 | return NULL; | |
59 | } | |
60 | ||
6a2968aa IE |
61 | /* ---- NCI requests ---- */ |
62 | ||
63 | void nci_req_complete(struct nci_dev *ndev, int result) | |
64 | { | |
65 | if (ndev->req_status == NCI_REQ_PEND) { | |
66 | ndev->req_result = result; | |
67 | ndev->req_status = NCI_REQ_DONE; | |
68 | complete(&ndev->req_completion); | |
69 | } | |
70 | } | |
71 | ||
72 | static void nci_req_cancel(struct nci_dev *ndev, int err) | |
73 | { | |
74 | if (ndev->req_status == NCI_REQ_PEND) { | |
75 | ndev->req_result = err; | |
76 | ndev->req_status = NCI_REQ_CANCELED; | |
77 | complete(&ndev->req_completion); | |
78 | } | |
79 | } | |
80 | ||
81 | /* Execute request and wait for completion. */ | |
82 | static int __nci_request(struct nci_dev *ndev, | |
eb9bc6e9 SO |
83 | void (*req)(struct nci_dev *ndev, unsigned long opt), |
84 | unsigned long opt, __u32 timeout) | |
6a2968aa IE |
85 | { |
86 | int rc = 0; | |
f8c141c3 | 87 | long completion_rc; |
6a2968aa IE |
88 | |
89 | ndev->req_status = NCI_REQ_PEND; | |
90 | ||
9bec44bf | 91 | reinit_completion(&ndev->req_completion); |
6a2968aa | 92 | req(ndev, opt); |
eb9bc6e9 SO |
93 | completion_rc = |
94 | wait_for_completion_interruptible_timeout(&ndev->req_completion, | |
95 | timeout); | |
6a2968aa | 96 | |
20c239c1 | 97 | pr_debug("wait_for_completion return %ld\n", completion_rc); |
6a2968aa IE |
98 | |
99 | if (completion_rc > 0) { | |
100 | switch (ndev->req_status) { | |
101 | case NCI_REQ_DONE: | |
102 | rc = nci_to_errno(ndev->req_result); | |
103 | break; | |
104 | ||
105 | case NCI_REQ_CANCELED: | |
106 | rc = -ndev->req_result; | |
107 | break; | |
108 | ||
109 | default: | |
110 | rc = -ETIMEDOUT; | |
111 | break; | |
112 | } | |
113 | } else { | |
ed1e0ad8 JP |
114 | pr_err("wait_for_completion_interruptible_timeout failed %ld\n", |
115 | completion_rc); | |
6a2968aa IE |
116 | |
117 | rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc)); | |
118 | } | |
119 | ||
120 | ndev->req_status = ndev->req_result = 0; | |
121 | ||
122 | return rc; | |
123 | } | |
124 | ||
125 | static inline int nci_request(struct nci_dev *ndev, | |
eb9bc6e9 SO |
126 | void (*req)(struct nci_dev *ndev, |
127 | unsigned long opt), | |
128 | unsigned long opt, __u32 timeout) | |
6a2968aa IE |
129 | { |
130 | int rc; | |
131 | ||
132 | if (!test_bit(NCI_UP, &ndev->flags)) | |
133 | return -ENETDOWN; | |
134 | ||
135 | /* Serialize all requests */ | |
136 | mutex_lock(&ndev->req_lock); | |
137 | rc = __nci_request(ndev, req, opt, timeout); | |
138 | mutex_unlock(&ndev->req_lock); | |
139 | ||
140 | return rc; | |
141 | } | |
142 | ||
143 | static void nci_reset_req(struct nci_dev *ndev, unsigned long opt) | |
144 | { | |
e8c0dacd IE |
145 | struct nci_core_reset_cmd cmd; |
146 | ||
147 | cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG; | |
148 | nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd); | |
6a2968aa IE |
149 | } |
150 | ||
151 | static void nci_init_req(struct nci_dev *ndev, unsigned long opt) | |
152 | { | |
153 | nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, 0, NULL); | |
154 | } | |
155 | ||
156 | static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt) | |
157 | { | |
2eb1dc10 IE |
158 | struct nci_rf_disc_map_cmd cmd; |
159 | struct disc_map_config *cfg = cmd.mapping_configs; | |
160 | __u8 *num = &cmd.num_mapping_configs; | |
6a2968aa IE |
161 | int i; |
162 | ||
6a2968aa | 163 | /* set rf mapping configurations */ |
2eb1dc10 | 164 | *num = 0; |
6a2968aa IE |
165 | |
166 | /* by default mapping is set to NCI_RF_INTERFACE_FRAME */ | |
167 | for (i = 0; i < ndev->num_supported_rf_interfaces; i++) { | |
168 | if (ndev->supported_rf_interfaces[i] == | |
eb9bc6e9 | 169 | NCI_RF_INTERFACE_ISO_DEP) { |
2eb1dc10 | 170 | cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP; |
637d85a7 IE |
171 | cfg[*num].mode = NCI_DISC_MAP_MODE_POLL | |
172 | NCI_DISC_MAP_MODE_LISTEN; | |
173 | cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP; | |
2eb1dc10 | 174 | (*num)++; |
6a2968aa | 175 | } else if (ndev->supported_rf_interfaces[i] == |
eb9bc6e9 | 176 | NCI_RF_INTERFACE_NFC_DEP) { |
2eb1dc10 | 177 | cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP; |
637d85a7 IE |
178 | cfg[*num].mode = NCI_DISC_MAP_MODE_POLL | |
179 | NCI_DISC_MAP_MODE_LISTEN; | |
180 | cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP; | |
2eb1dc10 | 181 | (*num)++; |
6a2968aa IE |
182 | } |
183 | ||
2eb1dc10 | 184 | if (*num == NCI_MAX_NUM_MAPPING_CONFIGS) |
6a2968aa IE |
185 | break; |
186 | } | |
187 | ||
188 | nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD, | |
eb9bc6e9 | 189 | (1 + ((*num) * sizeof(struct disc_map_config))), &cmd); |
6a2968aa IE |
190 | } |
191 | ||
7e035230 IE |
192 | struct nci_set_config_param { |
193 | __u8 id; | |
194 | size_t len; | |
195 | __u8 *val; | |
196 | }; | |
197 | ||
198 | static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt) | |
199 | { | |
200 | struct nci_set_config_param *param = (struct nci_set_config_param *)opt; | |
201 | struct nci_core_set_config_cmd cmd; | |
202 | ||
203 | BUG_ON(param->len > NCI_MAX_PARAM_LEN); | |
204 | ||
205 | cmd.num_params = 1; | |
206 | cmd.param.id = param->id; | |
207 | cmd.param.len = param->len; | |
208 | memcpy(cmd.param.val, param->val, param->len); | |
209 | ||
210 | nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd); | |
211 | } | |
212 | ||
772dccf4 JL |
213 | struct nci_rf_discover_param { |
214 | __u32 im_protocols; | |
215 | __u32 tm_protocols; | |
216 | }; | |
217 | ||
6a2968aa IE |
218 | static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt) |
219 | { | |
772dccf4 JL |
220 | struct nci_rf_discover_param *param = |
221 | (struct nci_rf_discover_param *)opt; | |
6a2968aa | 222 | struct nci_rf_disc_cmd cmd; |
6a2968aa IE |
223 | |
224 | cmd.num_disc_configs = 0; | |
225 | ||
226 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && | |
772dccf4 JL |
227 | (param->im_protocols & NFC_PROTO_JEWEL_MASK || |
228 | param->im_protocols & NFC_PROTO_MIFARE_MASK || | |
229 | param->im_protocols & NFC_PROTO_ISO14443_MASK || | |
230 | param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) { | |
637d85a7 | 231 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 232 | NCI_NFC_A_PASSIVE_POLL_MODE; |
6a2968aa IE |
233 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; |
234 | cmd.num_disc_configs++; | |
235 | } | |
236 | ||
237 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && | |
772dccf4 | 238 | (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) { |
637d85a7 | 239 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 240 | NCI_NFC_B_PASSIVE_POLL_MODE; |
6a2968aa IE |
241 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; |
242 | cmd.num_disc_configs++; | |
243 | } | |
244 | ||
245 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && | |
772dccf4 JL |
246 | (param->im_protocols & NFC_PROTO_FELICA_MASK || |
247 | param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) { | |
637d85a7 | 248 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
eb9bc6e9 | 249 | NCI_NFC_F_PASSIVE_POLL_MODE; |
6a2968aa IE |
250 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; |
251 | cmd.num_disc_configs++; | |
252 | } | |
253 | ||
cfdbeeaf | 254 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && |
772dccf4 | 255 | (param->im_protocols & NFC_PROTO_ISO15693_MASK)) { |
cfdbeeaf VC |
256 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = |
257 | NCI_NFC_V_PASSIVE_POLL_MODE; | |
258 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; | |
259 | cmd.num_disc_configs++; | |
260 | } | |
261 | ||
772dccf4 JL |
262 | if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) && |
263 | (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) { | |
264 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = | |
265 | NCI_NFC_A_PASSIVE_LISTEN_MODE; | |
266 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; | |
267 | cmd.num_disc_configs++; | |
268 | cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = | |
269 | NCI_NFC_F_PASSIVE_LISTEN_MODE; | |
270 | cmd.disc_configs[cmd.num_disc_configs].frequency = 1; | |
271 | cmd.num_disc_configs++; | |
272 | } | |
273 | ||
6a2968aa | 274 | nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD, |
eb9bc6e9 SO |
275 | (1 + (cmd.num_disc_configs * sizeof(struct disc_config))), |
276 | &cmd); | |
6a2968aa IE |
277 | } |
278 | ||
019c4fba IE |
279 | struct nci_rf_discover_select_param { |
280 | __u8 rf_discovery_id; | |
281 | __u8 rf_protocol; | |
282 | }; | |
283 | ||
284 | static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt) | |
285 | { | |
286 | struct nci_rf_discover_select_param *param = | |
eb9bc6e9 | 287 | (struct nci_rf_discover_select_param *)opt; |
019c4fba IE |
288 | struct nci_rf_discover_select_cmd cmd; |
289 | ||
290 | cmd.rf_discovery_id = param->rf_discovery_id; | |
291 | cmd.rf_protocol = param->rf_protocol; | |
292 | ||
293 | switch (cmd.rf_protocol) { | |
294 | case NCI_RF_PROTOCOL_ISO_DEP: | |
295 | cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP; | |
296 | break; | |
297 | ||
298 | case NCI_RF_PROTOCOL_NFC_DEP: | |
299 | cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP; | |
300 | break; | |
301 | ||
302 | default: | |
303 | cmd.rf_interface = NCI_RF_INTERFACE_FRAME; | |
304 | break; | |
305 | } | |
306 | ||
307 | nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD, | |
eb9bc6e9 | 308 | sizeof(struct nci_rf_discover_select_cmd), &cmd); |
019c4fba IE |
309 | } |
310 | ||
6a2968aa IE |
311 | static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt) |
312 | { | |
313 | struct nci_rf_deactivate_cmd cmd; | |
314 | ||
9295b5b5 | 315 | cmd.type = opt; |
6a2968aa IE |
316 | |
317 | nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD, | |
eb9bc6e9 | 318 | sizeof(struct nci_rf_deactivate_cmd), &cmd); |
6a2968aa IE |
319 | } |
320 | ||
321 | static int nci_open_device(struct nci_dev *ndev) | |
322 | { | |
323 | int rc = 0; | |
324 | ||
325 | mutex_lock(&ndev->req_lock); | |
326 | ||
327 | if (test_bit(NCI_UP, &ndev->flags)) { | |
328 | rc = -EALREADY; | |
329 | goto done; | |
330 | } | |
331 | ||
332 | if (ndev->ops->open(ndev)) { | |
333 | rc = -EIO; | |
334 | goto done; | |
335 | } | |
336 | ||
337 | atomic_set(&ndev->cmd_cnt, 1); | |
338 | ||
339 | set_bit(NCI_INIT, &ndev->flags); | |
340 | ||
341 | rc = __nci_request(ndev, nci_reset_req, 0, | |
eb9bc6e9 | 342 | msecs_to_jiffies(NCI_RESET_TIMEOUT)); |
6a2968aa | 343 | |
44a589ca | 344 | if (ndev->ops->setup) |
86e8586e AK |
345 | ndev->ops->setup(ndev); |
346 | ||
6a2968aa IE |
347 | if (!rc) { |
348 | rc = __nci_request(ndev, nci_init_req, 0, | |
eb9bc6e9 | 349 | msecs_to_jiffies(NCI_INIT_TIMEOUT)); |
6a2968aa IE |
350 | } |
351 | ||
352 | if (!rc) { | |
353 | rc = __nci_request(ndev, nci_init_complete_req, 0, | |
eb9bc6e9 | 354 | msecs_to_jiffies(NCI_INIT_TIMEOUT)); |
6a2968aa IE |
355 | } |
356 | ||
357 | clear_bit(NCI_INIT, &ndev->flags); | |
358 | ||
359 | if (!rc) { | |
360 | set_bit(NCI_UP, &ndev->flags); | |
019c4fba | 361 | nci_clear_target_list(ndev); |
8939e47f | 362 | atomic_set(&ndev->state, NCI_IDLE); |
6a2968aa IE |
363 | } else { |
364 | /* Init failed, cleanup */ | |
365 | skb_queue_purge(&ndev->cmd_q); | |
366 | skb_queue_purge(&ndev->rx_q); | |
367 | skb_queue_purge(&ndev->tx_q); | |
368 | ||
369 | ndev->ops->close(ndev); | |
370 | ndev->flags = 0; | |
371 | } | |
372 | ||
373 | done: | |
374 | mutex_unlock(&ndev->req_lock); | |
375 | return rc; | |
376 | } | |
377 | ||
378 | static int nci_close_device(struct nci_dev *ndev) | |
379 | { | |
380 | nci_req_cancel(ndev, ENODEV); | |
381 | mutex_lock(&ndev->req_lock); | |
382 | ||
383 | if (!test_and_clear_bit(NCI_UP, &ndev->flags)) { | |
384 | del_timer_sync(&ndev->cmd_timer); | |
c4bf98b2 | 385 | del_timer_sync(&ndev->data_timer); |
6a2968aa IE |
386 | mutex_unlock(&ndev->req_lock); |
387 | return 0; | |
388 | } | |
389 | ||
390 | /* Drop RX and TX queues */ | |
391 | skb_queue_purge(&ndev->rx_q); | |
392 | skb_queue_purge(&ndev->tx_q); | |
393 | ||
394 | /* Flush RX and TX wq */ | |
395 | flush_workqueue(ndev->rx_wq); | |
396 | flush_workqueue(ndev->tx_wq); | |
397 | ||
398 | /* Reset device */ | |
399 | skb_queue_purge(&ndev->cmd_q); | |
400 | atomic_set(&ndev->cmd_cnt, 1); | |
401 | ||
402 | set_bit(NCI_INIT, &ndev->flags); | |
403 | __nci_request(ndev, nci_reset_req, 0, | |
eb9bc6e9 | 404 | msecs_to_jiffies(NCI_RESET_TIMEOUT)); |
6a2968aa IE |
405 | clear_bit(NCI_INIT, &ndev->flags); |
406 | ||
fa9be5f0 AK |
407 | del_timer_sync(&ndev->cmd_timer); |
408 | ||
6a2968aa IE |
409 | /* Flush cmd wq */ |
410 | flush_workqueue(ndev->cmd_wq); | |
411 | ||
412 | /* After this point our queues are empty | |
413 | * and no works are scheduled. */ | |
414 | ndev->ops->close(ndev); | |
415 | ||
416 | /* Clear flags */ | |
417 | ndev->flags = 0; | |
418 | ||
419 | mutex_unlock(&ndev->req_lock); | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | /* NCI command timer function */ | |
425 | static void nci_cmd_timer(unsigned long arg) | |
426 | { | |
427 | struct nci_dev *ndev = (void *) arg; | |
428 | ||
6a2968aa IE |
429 | atomic_set(&ndev->cmd_cnt, 1); |
430 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
431 | } | |
432 | ||
c4bf98b2 IE |
433 | /* NCI data exchange timer function */ |
434 | static void nci_data_timer(unsigned long arg) | |
435 | { | |
436 | struct nci_dev *ndev = (void *) arg; | |
437 | ||
438 | set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); | |
439 | queue_work(ndev->rx_wq, &ndev->rx_work); | |
440 | } | |
441 | ||
6a2968aa IE |
442 | static int nci_dev_up(struct nfc_dev *nfc_dev) |
443 | { | |
444 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
445 | ||
6a2968aa IE |
446 | return nci_open_device(ndev); |
447 | } | |
448 | ||
449 | static int nci_dev_down(struct nfc_dev *nfc_dev) | |
450 | { | |
451 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
452 | ||
6a2968aa IE |
453 | return nci_close_device(ndev); |
454 | } | |
455 | ||
22c15bf3 AK |
456 | int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val) |
457 | { | |
458 | struct nci_set_config_param param; | |
459 | ||
460 | if (!val || !len) | |
461 | return 0; | |
462 | ||
463 | param.id = id; | |
464 | param.len = len; | |
465 | param.val = val; | |
466 | ||
467 | return __nci_request(ndev, nci_set_config_req, (unsigned long)¶m, | |
468 | msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); | |
469 | } | |
470 | EXPORT_SYMBOL(nci_set_config); | |
471 | ||
af9c8aa6 CR |
472 | static void nci_nfcee_discover_req(struct nci_dev *ndev, unsigned long opt) |
473 | { | |
474 | struct nci_nfcee_discover_cmd cmd; | |
475 | __u8 action = opt; | |
476 | ||
477 | cmd.discovery_action = action; | |
478 | ||
479 | nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd); | |
480 | } | |
481 | ||
482 | int nci_nfcee_discover(struct nci_dev *ndev, u8 action) | |
483 | { | |
484 | return nci_request(ndev, nci_nfcee_discover_req, action, | |
485 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
486 | } | |
487 | EXPORT_SYMBOL(nci_nfcee_discover); | |
488 | ||
f7f793f3 CR |
489 | static void nci_nfcee_mode_set_req(struct nci_dev *ndev, unsigned long opt) |
490 | { | |
491 | struct nci_nfcee_mode_set_cmd *cmd = | |
492 | (struct nci_nfcee_mode_set_cmd *)opt; | |
493 | ||
494 | nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD, | |
495 | sizeof(struct nci_nfcee_mode_set_cmd), cmd); | |
496 | } | |
497 | ||
498 | int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode) | |
499 | { | |
500 | struct nci_nfcee_mode_set_cmd cmd; | |
501 | ||
502 | cmd.nfcee_id = nfcee_id; | |
503 | cmd.nfcee_mode = nfcee_mode; | |
504 | ||
505 | return nci_request(ndev, nci_nfcee_mode_set_req, (unsigned long)&cmd, | |
506 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
507 | } | |
508 | EXPORT_SYMBOL(nci_nfcee_mode_set); | |
509 | ||
736bb957 CR |
510 | static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt) |
511 | { | |
512 | struct nci_core_conn_create_cmd cmd; | |
513 | struct core_conn_create_dest_spec_params *params = | |
514 | (struct core_conn_create_dest_spec_params *)opt; | |
515 | ||
516 | cmd.destination_type = NCI_DESTINATION_NFCEE; | |
517 | cmd.number_destination_params = 1; | |
518 | memcpy(&cmd.params.type, params, | |
519 | sizeof(struct core_conn_create_dest_spec_params)); | |
520 | nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, | |
521 | sizeof(struct nci_core_conn_create_cmd), &cmd); | |
522 | } | |
523 | ||
524 | int nci_core_conn_create(struct nci_dev *ndev, | |
525 | struct core_conn_create_dest_spec_params *params) | |
526 | { | |
527 | ndev->cur_id = params->value.id; | |
528 | return nci_request(ndev, nci_core_conn_create_req, | |
529 | (unsigned long)params, | |
530 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
531 | } | |
532 | EXPORT_SYMBOL(nci_core_conn_create); | |
533 | ||
534 | static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt) | |
535 | { | |
536 | __u8 conn_id = opt; | |
537 | ||
538 | nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id); | |
539 | } | |
540 | ||
541 | int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id) | |
542 | { | |
543 | return nci_request(ndev, nci_core_conn_close_req, conn_id, | |
544 | msecs_to_jiffies(NCI_CMD_TIMEOUT)); | |
545 | } | |
546 | EXPORT_SYMBOL(nci_core_conn_close); | |
547 | ||
7e035230 IE |
548 | static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev) |
549 | { | |
550 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
551 | struct nci_set_config_param param; | |
529ee066 | 552 | int rc; |
7e035230 IE |
553 | |
554 | param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len); | |
555 | if ((param.val == NULL) || (param.len == 0)) | |
f9fc36f4 | 556 | return 0; |
7e035230 | 557 | |
460d8f97 | 558 | if (param.len > NFC_MAX_GT_LEN) |
7e035230 IE |
559 | return -EINVAL; |
560 | ||
7e035230 | 561 | param.id = NCI_PN_ATR_REQ_GEN_BYTES; |
7e035230 | 562 | |
529ee066 JL |
563 | rc = nci_request(ndev, nci_set_config_req, (unsigned long)¶m, |
564 | msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); | |
565 | if (rc) | |
566 | return rc; | |
567 | ||
568 | param.id = NCI_LN_ATR_RES_GEN_BYTES; | |
569 | ||
f9fc36f4 SJ |
570 | return nci_request(ndev, nci_set_config_req, (unsigned long)¶m, |
571 | msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); | |
7e035230 IE |
572 | } |
573 | ||
90d78c13 JL |
574 | static int nci_set_listen_parameters(struct nfc_dev *nfc_dev) |
575 | { | |
576 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
577 | int rc; | |
578 | __u8 val; | |
579 | ||
580 | val = NCI_LA_SEL_INFO_NFC_DEP_MASK; | |
581 | ||
582 | rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val); | |
583 | if (rc) | |
584 | return rc; | |
585 | ||
586 | val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK; | |
587 | ||
588 | rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val); | |
589 | if (rc) | |
590 | return rc; | |
591 | ||
592 | val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424; | |
593 | ||
594 | return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val); | |
595 | } | |
596 | ||
fe7c5800 SO |
597 | static int nci_start_poll(struct nfc_dev *nfc_dev, |
598 | __u32 im_protocols, __u32 tm_protocols) | |
6a2968aa IE |
599 | { |
600 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
772dccf4 | 601 | struct nci_rf_discover_param param; |
6a2968aa IE |
602 | int rc; |
603 | ||
019c4fba | 604 | if ((atomic_read(&ndev->state) == NCI_DISCOVERY) || |
eb9bc6e9 | 605 | (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) { |
ed1e0ad8 | 606 | pr_err("unable to start poll, since poll is already active\n"); |
6a2968aa IE |
607 | return -EBUSY; |
608 | } | |
609 | ||
de054799 | 610 | if (ndev->target_active_prot) { |
ed1e0ad8 | 611 | pr_err("there is an active target\n"); |
de054799 IE |
612 | return -EBUSY; |
613 | } | |
614 | ||
019c4fba | 615 | if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) || |
eb9bc6e9 | 616 | (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) { |
019c4fba | 617 | pr_debug("target active or w4 select, implicitly deactivate\n"); |
6a2968aa | 618 | |
9295b5b5 CR |
619 | rc = nci_request(ndev, nci_rf_deactivate_req, |
620 | NCI_DEACTIVATE_TYPE_IDLE_MODE, | |
eb9bc6e9 | 621 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
622 | if (rc) |
623 | return -EBUSY; | |
624 | } | |
625 | ||
529ee066 | 626 | if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) { |
7e035230 IE |
627 | rc = nci_set_local_general_bytes(nfc_dev); |
628 | if (rc) { | |
629 | pr_err("failed to set local general bytes\n"); | |
630 | return rc; | |
631 | } | |
632 | } | |
633 | ||
90d78c13 JL |
634 | if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { |
635 | rc = nci_set_listen_parameters(nfc_dev); | |
636 | if (rc) | |
637 | pr_err("failed to set listen parameters\n"); | |
638 | } | |
639 | ||
772dccf4 JL |
640 | param.im_protocols = im_protocols; |
641 | param.tm_protocols = tm_protocols; | |
642 | rc = nci_request(ndev, nci_rf_discover_req, (unsigned long)¶m, | |
eb9bc6e9 | 643 | msecs_to_jiffies(NCI_RF_DISC_TIMEOUT)); |
6a2968aa IE |
644 | |
645 | if (!rc) | |
fe7c5800 | 646 | ndev->poll_prots = im_protocols; |
6a2968aa IE |
647 | |
648 | return rc; | |
649 | } | |
650 | ||
651 | static void nci_stop_poll(struct nfc_dev *nfc_dev) | |
652 | { | |
653 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
654 | ||
019c4fba | 655 | if ((atomic_read(&ndev->state) != NCI_DISCOVERY) && |
eb9bc6e9 | 656 | (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) { |
ed1e0ad8 | 657 | pr_err("unable to stop poll, since poll is not active\n"); |
6a2968aa IE |
658 | return; |
659 | } | |
660 | ||
9295b5b5 | 661 | nci_request(ndev, nci_rf_deactivate_req, NCI_DEACTIVATE_TYPE_IDLE_MODE, |
eb9bc6e9 | 662 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
663 | } |
664 | ||
90099433 EL |
665 | static int nci_activate_target(struct nfc_dev *nfc_dev, |
666 | struct nfc_target *target, __u32 protocol) | |
6a2968aa IE |
667 | { |
668 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
019c4fba | 669 | struct nci_rf_discover_select_param param; |
90099433 | 670 | struct nfc_target *nci_target = NULL; |
019c4fba IE |
671 | int i; |
672 | int rc = 0; | |
6a2968aa | 673 | |
90099433 | 674 | pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol); |
6a2968aa | 675 | |
019c4fba | 676 | if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) && |
eb9bc6e9 | 677 | (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) { |
ed1e0ad8 | 678 | pr_err("there is no available target to activate\n"); |
6a2968aa IE |
679 | return -EINVAL; |
680 | } | |
681 | ||
682 | if (ndev->target_active_prot) { | |
ed1e0ad8 | 683 | pr_err("there is already an active target\n"); |
6a2968aa IE |
684 | return -EBUSY; |
685 | } | |
686 | ||
019c4fba | 687 | for (i = 0; i < ndev->n_targets; i++) { |
90099433 EL |
688 | if (ndev->targets[i].idx == target->idx) { |
689 | nci_target = &ndev->targets[i]; | |
019c4fba IE |
690 | break; |
691 | } | |
692 | } | |
693 | ||
90099433 | 694 | if (!nci_target) { |
019c4fba IE |
695 | pr_err("unable to find the selected target\n"); |
696 | return -EINVAL; | |
697 | } | |
698 | ||
90099433 | 699 | if (!(nci_target->supported_protocols & (1 << protocol))) { |
ed1e0ad8 JP |
700 | pr_err("target does not support the requested protocol 0x%x\n", |
701 | protocol); | |
6a2968aa IE |
702 | return -EINVAL; |
703 | } | |
704 | ||
019c4fba | 705 | if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) { |
90099433 | 706 | param.rf_discovery_id = nci_target->logical_idx; |
019c4fba IE |
707 | |
708 | if (protocol == NFC_PROTO_JEWEL) | |
709 | param.rf_protocol = NCI_RF_PROTOCOL_T1T; | |
710 | else if (protocol == NFC_PROTO_MIFARE) | |
711 | param.rf_protocol = NCI_RF_PROTOCOL_T2T; | |
712 | else if (protocol == NFC_PROTO_FELICA) | |
713 | param.rf_protocol = NCI_RF_PROTOCOL_T3T; | |
01d719a2 SO |
714 | else if (protocol == NFC_PROTO_ISO14443 || |
715 | protocol == NFC_PROTO_ISO14443_B) | |
019c4fba IE |
716 | param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP; |
717 | else | |
718 | param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP; | |
719 | ||
720 | rc = nci_request(ndev, nci_rf_discover_select_req, | |
eb9bc6e9 SO |
721 | (unsigned long)¶m, |
722 | msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT)); | |
019c4fba | 723 | } |
6a2968aa | 724 | |
019c4fba IE |
725 | if (!rc) |
726 | ndev->target_active_prot = protocol; | |
727 | ||
728 | return rc; | |
6a2968aa IE |
729 | } |
730 | ||
90099433 EL |
731 | static void nci_deactivate_target(struct nfc_dev *nfc_dev, |
732 | struct nfc_target *target) | |
6a2968aa IE |
733 | { |
734 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
735 | ||
767f19ae | 736 | pr_debug("entry\n"); |
6a2968aa IE |
737 | |
738 | if (!ndev->target_active_prot) { | |
ed1e0ad8 | 739 | pr_err("unable to deactivate target, no active target\n"); |
6a2968aa IE |
740 | return; |
741 | } | |
742 | ||
743 | ndev->target_active_prot = 0; | |
744 | ||
8939e47f | 745 | if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) { |
9295b5b5 CR |
746 | nci_request(ndev, nci_rf_deactivate_req, |
747 | NCI_DEACTIVATE_TYPE_SLEEP_MODE, | |
eb9bc6e9 | 748 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); |
6a2968aa IE |
749 | } |
750 | } | |
751 | ||
767f19ae IE |
752 | static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, |
753 | __u8 comm_mode, __u8 *gb, size_t gb_len) | |
754 | { | |
755 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
756 | int rc; | |
757 | ||
758 | pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode); | |
759 | ||
760 | rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP); | |
761 | if (rc) | |
762 | return rc; | |
763 | ||
764 | rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb, | |
765 | ndev->remote_gb_len); | |
766 | if (!rc) | |
767 | rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE, | |
768 | NFC_RF_INITIATOR); | |
769 | ||
770 | return rc; | |
771 | } | |
772 | ||
773 | static int nci_dep_link_down(struct nfc_dev *nfc_dev) | |
774 | { | |
d7979e13 JL |
775 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
776 | int rc; | |
777 | ||
767f19ae IE |
778 | pr_debug("entry\n"); |
779 | ||
d7979e13 JL |
780 | if (nfc_dev->rf_mode == NFC_RF_INITIATOR) { |
781 | nci_deactivate_target(nfc_dev, NULL); | |
782 | } else { | |
783 | if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE || | |
784 | atomic_read(&ndev->state) == NCI_DISCOVERY) { | |
785 | nci_request(ndev, nci_rf_deactivate_req, 0, | |
786 | msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); | |
787 | } | |
788 | ||
789 | rc = nfc_tm_deactivated(nfc_dev); | |
790 | if (rc) | |
791 | pr_err("error when signaling tm deactivation\n"); | |
792 | } | |
767f19ae IE |
793 | |
794 | return 0; | |
795 | } | |
796 | ||
797 | ||
be9ae4ce SO |
798 | static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, |
799 | struct sk_buff *skb, | |
800 | data_exchange_cb_t cb, void *cb_context) | |
6a2968aa IE |
801 | { |
802 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
38f04c6b | 803 | int rc; |
4aeee687 CR |
804 | struct nci_conn_info *conn_info; |
805 | ||
806 | conn_info = nci_get_conn_info_by_conn_id(ndev, NCI_STATIC_RF_CONN_ID); | |
807 | if (!conn_info) | |
808 | return -EPROTO; | |
6a2968aa | 809 | |
90099433 | 810 | pr_debug("target_idx %d, len %d\n", target->idx, skb->len); |
6a2968aa IE |
811 | |
812 | if (!ndev->target_active_prot) { | |
ed1e0ad8 | 813 | pr_err("unable to exchange data, no active target\n"); |
6a2968aa IE |
814 | return -EINVAL; |
815 | } | |
816 | ||
38f04c6b IE |
817 | if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags)) |
818 | return -EBUSY; | |
819 | ||
6a2968aa | 820 | /* store cb and context to be used on receiving data */ |
4aeee687 CR |
821 | conn_info->data_exchange_cb = cb; |
822 | conn_info->data_exchange_cb_context = cb_context; | |
6a2968aa | 823 | |
e8c0dacd | 824 | rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb); |
38f04c6b IE |
825 | if (rc) |
826 | clear_bit(NCI_DATA_EXCHANGE, &ndev->flags); | |
827 | ||
828 | return rc; | |
6a2968aa IE |
829 | } |
830 | ||
485f442f JL |
831 | static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) |
832 | { | |
833 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
834 | int rc; | |
835 | ||
836 | rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb); | |
837 | if (rc) | |
838 | pr_err("unable to send data\n"); | |
839 | ||
840 | return rc; | |
841 | } | |
842 | ||
0a946301 SO |
843 | static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx) |
844 | { | |
93bca2bf CR |
845 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
846 | ||
847 | if (ndev->ops->enable_se) | |
848 | return ndev->ops->enable_se(ndev, se_idx); | |
849 | ||
0a946301 SO |
850 | return 0; |
851 | } | |
852 | ||
853 | static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx) | |
854 | { | |
e9ef9431 CR |
855 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
856 | ||
857 | if (ndev->ops->disable_se) | |
858 | return ndev->ops->disable_se(ndev, se_idx); | |
859 | ||
0a946301 SO |
860 | return 0; |
861 | } | |
862 | ||
863 | static int nci_discover_se(struct nfc_dev *nfc_dev) | |
864 | { | |
ba4db551 CR |
865 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); |
866 | ||
867 | if (ndev->ops->discover_se) | |
868 | return ndev->ops->discover_se(ndev); | |
869 | ||
0a946301 SO |
870 | return 0; |
871 | } | |
872 | ||
a688bf55 CR |
873 | static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx, |
874 | u8 *apdu, size_t apdu_length, | |
875 | se_io_cb_t cb, void *cb_context) | |
876 | { | |
877 | struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); | |
878 | ||
879 | if (ndev->ops->se_io) | |
880 | return ndev->ops->se_io(ndev, se_idx, apdu, | |
881 | apdu_length, cb, cb_context); | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
6a2968aa IE |
886 | static struct nfc_ops nci_nfc_ops = { |
887 | .dev_up = nci_dev_up, | |
888 | .dev_down = nci_dev_down, | |
889 | .start_poll = nci_start_poll, | |
890 | .stop_poll = nci_stop_poll, | |
767f19ae IE |
891 | .dep_link_up = nci_dep_link_up, |
892 | .dep_link_down = nci_dep_link_down, | |
6a2968aa IE |
893 | .activate_target = nci_activate_target, |
894 | .deactivate_target = nci_deactivate_target, | |
be9ae4ce | 895 | .im_transceive = nci_transceive, |
485f442f | 896 | .tm_send = nci_tm_send, |
0a946301 SO |
897 | .enable_se = nci_enable_se, |
898 | .disable_se = nci_disable_se, | |
899 | .discover_se = nci_discover_se, | |
a688bf55 | 900 | .se_io = nci_se_io, |
6a2968aa IE |
901 | }; |
902 | ||
903 | /* ---- Interface to NCI drivers ---- */ | |
904 | ||
905 | /** | |
906 | * nci_allocate_device - allocate a new nci device | |
907 | * | |
908 | * @ops: device operations | |
909 | * @supported_protocols: NFC protocols supported by the device | |
910 | */ | |
911 | struct nci_dev *nci_allocate_device(struct nci_ops *ops, | |
eb9bc6e9 SO |
912 | __u32 supported_protocols, |
913 | int tx_headroom, int tx_tailroom) | |
6a2968aa | 914 | { |
8ebafde0 | 915 | struct nci_dev *ndev; |
6a2968aa | 916 | |
24bf3304 | 917 | pr_debug("supported_protocols 0x%x\n", supported_protocols); |
6a2968aa IE |
918 | |
919 | if (!ops->open || !ops->close || !ops->send) | |
8ebafde0 | 920 | return NULL; |
6a2968aa IE |
921 | |
922 | if (!supported_protocols) | |
8ebafde0 | 923 | return NULL; |
6a2968aa IE |
924 | |
925 | ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL); | |
926 | if (!ndev) | |
8ebafde0 | 927 | return NULL; |
6a2968aa IE |
928 | |
929 | ndev->ops = ops; | |
930 | ndev->tx_headroom = tx_headroom; | |
931 | ndev->tx_tailroom = tx_tailroom; | |
9bec44bf | 932 | init_completion(&ndev->req_completion); |
6a2968aa IE |
933 | |
934 | ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops, | |
eb9bc6e9 SO |
935 | supported_protocols, |
936 | tx_headroom + NCI_DATA_HDR_SIZE, | |
937 | tx_tailroom); | |
6a2968aa IE |
938 | if (!ndev->nfc_dev) |
939 | goto free_exit; | |
940 | ||
941 | nfc_set_drvdata(ndev->nfc_dev, ndev); | |
942 | ||
8ebafde0 | 943 | return ndev; |
6a2968aa IE |
944 | |
945 | free_exit: | |
946 | kfree(ndev); | |
8ebafde0 | 947 | return NULL; |
6a2968aa IE |
948 | } |
949 | EXPORT_SYMBOL(nci_allocate_device); | |
950 | ||
951 | /** | |
952 | * nci_free_device - deallocate nci device | |
953 | * | |
954 | * @ndev: The nci device to deallocate | |
955 | */ | |
956 | void nci_free_device(struct nci_dev *ndev) | |
957 | { | |
6a2968aa IE |
958 | nfc_free_device(ndev->nfc_dev); |
959 | kfree(ndev); | |
960 | } | |
961 | EXPORT_SYMBOL(nci_free_device); | |
962 | ||
963 | /** | |
964 | * nci_register_device - register a nci device in the nfc subsystem | |
965 | * | |
966 | * @dev: The nci device to register | |
967 | */ | |
968 | int nci_register_device(struct nci_dev *ndev) | |
969 | { | |
970 | int rc; | |
971 | struct device *dev = &ndev->nfc_dev->dev; | |
972 | char name[32]; | |
973 | ||
6a2968aa IE |
974 | ndev->flags = 0; |
975 | ||
976 | INIT_WORK(&ndev->cmd_work, nci_cmd_work); | |
977 | snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev)); | |
978 | ndev->cmd_wq = create_singlethread_workqueue(name); | |
979 | if (!ndev->cmd_wq) { | |
980 | rc = -ENOMEM; | |
3c1c0f5d | 981 | goto exit; |
6a2968aa IE |
982 | } |
983 | ||
984 | INIT_WORK(&ndev->rx_work, nci_rx_work); | |
985 | snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev)); | |
986 | ndev->rx_wq = create_singlethread_workqueue(name); | |
987 | if (!ndev->rx_wq) { | |
988 | rc = -ENOMEM; | |
989 | goto destroy_cmd_wq_exit; | |
990 | } | |
991 | ||
992 | INIT_WORK(&ndev->tx_work, nci_tx_work); | |
993 | snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev)); | |
994 | ndev->tx_wq = create_singlethread_workqueue(name); | |
995 | if (!ndev->tx_wq) { | |
996 | rc = -ENOMEM; | |
997 | goto destroy_rx_wq_exit; | |
998 | } | |
999 | ||
1000 | skb_queue_head_init(&ndev->cmd_q); | |
1001 | skb_queue_head_init(&ndev->rx_q); | |
1002 | skb_queue_head_init(&ndev->tx_q); | |
1003 | ||
1004 | setup_timer(&ndev->cmd_timer, nci_cmd_timer, | |
eb9bc6e9 | 1005 | (unsigned long) ndev); |
c4bf98b2 | 1006 | setup_timer(&ndev->data_timer, nci_data_timer, |
eb9bc6e9 | 1007 | (unsigned long) ndev); |
6a2968aa IE |
1008 | |
1009 | mutex_init(&ndev->req_lock); | |
4aeee687 | 1010 | INIT_LIST_HEAD(&ndev->conn_info_list); |
6a2968aa | 1011 | |
3c1c0f5d VC |
1012 | rc = nfc_register_device(ndev->nfc_dev); |
1013 | if (rc) | |
1014 | goto destroy_rx_wq_exit; | |
1015 | ||
6a2968aa IE |
1016 | goto exit; |
1017 | ||
1018 | destroy_rx_wq_exit: | |
1019 | destroy_workqueue(ndev->rx_wq); | |
1020 | ||
1021 | destroy_cmd_wq_exit: | |
1022 | destroy_workqueue(ndev->cmd_wq); | |
1023 | ||
6a2968aa IE |
1024 | exit: |
1025 | return rc; | |
1026 | } | |
1027 | EXPORT_SYMBOL(nci_register_device); | |
1028 | ||
1029 | /** | |
1030 | * nci_unregister_device - unregister a nci device in the nfc subsystem | |
1031 | * | |
1032 | * @dev: The nci device to unregister | |
1033 | */ | |
1034 | void nci_unregister_device(struct nci_dev *ndev) | |
1035 | { | |
4aeee687 CR |
1036 | struct nci_conn_info *conn_info, *n; |
1037 | ||
6a2968aa IE |
1038 | nci_close_device(ndev); |
1039 | ||
1040 | destroy_workqueue(ndev->cmd_wq); | |
1041 | destroy_workqueue(ndev->rx_wq); | |
1042 | destroy_workqueue(ndev->tx_wq); | |
1043 | ||
4aeee687 CR |
1044 | list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) { |
1045 | list_del(&conn_info->list); | |
1046 | /* conn_info is allocated with devm_kzalloc */ | |
1047 | } | |
1048 | ||
6a2968aa IE |
1049 | nfc_unregister_device(ndev->nfc_dev); |
1050 | } | |
1051 | EXPORT_SYMBOL(nci_unregister_device); | |
1052 | ||
1053 | /** | |
1054 | * nci_recv_frame - receive frame from NCI drivers | |
1055 | * | |
1095e69f | 1056 | * @ndev: The nci device |
6a2968aa IE |
1057 | * @skb: The sk_buff to receive |
1058 | */ | |
1095e69f | 1059 | int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb) |
6a2968aa | 1060 | { |
24bf3304 | 1061 | pr_debug("len %d\n", skb->len); |
6a2968aa | 1062 | |
874934f4 SJ |
1063 | if (!ndev || (!test_bit(NCI_UP, &ndev->flags) && |
1064 | !test_bit(NCI_INIT, &ndev->flags))) { | |
6a2968aa IE |
1065 | kfree_skb(skb); |
1066 | return -ENXIO; | |
1067 | } | |
1068 | ||
1069 | /* Queue frame for rx worker thread */ | |
1070 | skb_queue_tail(&ndev->rx_q, skb); | |
1071 | queue_work(ndev->rx_wq, &ndev->rx_work); | |
1072 | ||
1073 | return 0; | |
1074 | } | |
1075 | EXPORT_SYMBOL(nci_recv_frame); | |
1076 | ||
1095e69f | 1077 | static int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb) |
6a2968aa | 1078 | { |
24bf3304 | 1079 | pr_debug("len %d\n", skb->len); |
6a2968aa IE |
1080 | |
1081 | if (!ndev) { | |
1082 | kfree_skb(skb); | |
1083 | return -ENODEV; | |
1084 | } | |
1085 | ||
1086 | /* Get rid of skb owner, prior to sending to the driver. */ | |
1087 | skb_orphan(skb); | |
1088 | ||
05158296 HT |
1089 | /* Send copy to sniffer */ |
1090 | nfc_send_to_raw_sock(ndev->nfc_dev, skb, | |
1091 | RAW_PAYLOAD_NCI, NFC_DIRECTION_TX); | |
1092 | ||
1095e69f | 1093 | return ndev->ops->send(ndev, skb); |
6a2968aa IE |
1094 | } |
1095 | ||
1096 | /* Send NCI command */ | |
1097 | int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload) | |
1098 | { | |
1099 | struct nci_ctrl_hdr *hdr; | |
1100 | struct sk_buff *skb; | |
1101 | ||
24bf3304 | 1102 | pr_debug("opcode 0x%x, plen %d\n", opcode, plen); |
6a2968aa IE |
1103 | |
1104 | skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL); | |
1105 | if (!skb) { | |
ed1e0ad8 | 1106 | pr_err("no memory for command\n"); |
6a2968aa IE |
1107 | return -ENOMEM; |
1108 | } | |
1109 | ||
1110 | hdr = (struct nci_ctrl_hdr *) skb_put(skb, NCI_CTRL_HDR_SIZE); | |
1111 | hdr->gid = nci_opcode_gid(opcode); | |
1112 | hdr->oid = nci_opcode_oid(opcode); | |
1113 | hdr->plen = plen; | |
1114 | ||
1115 | nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT); | |
1116 | nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST); | |
1117 | ||
1118 | if (plen) | |
1119 | memcpy(skb_put(skb, plen), payload, plen); | |
1120 | ||
6a2968aa IE |
1121 | skb_queue_tail(&ndev->cmd_q, skb); |
1122 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | /* ---- NCI TX Data worker thread ---- */ | |
1128 | ||
1129 | static void nci_tx_work(struct work_struct *work) | |
1130 | { | |
1131 | struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work); | |
4aeee687 | 1132 | struct nci_conn_info *conn_info; |
6a2968aa IE |
1133 | struct sk_buff *skb; |
1134 | ||
4aeee687 CR |
1135 | conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id); |
1136 | if (!conn_info) | |
1137 | return; | |
1138 | ||
1139 | pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt)); | |
6a2968aa IE |
1140 | |
1141 | /* Send queued tx data */ | |
4aeee687 | 1142 | while (atomic_read(&conn_info->credits_cnt)) { |
6a2968aa IE |
1143 | skb = skb_dequeue(&ndev->tx_q); |
1144 | if (!skb) | |
1145 | return; | |
1146 | ||
db98c829 | 1147 | /* Check if data flow control is used */ |
4aeee687 | 1148 | if (atomic_read(&conn_info->credits_cnt) != |
eb9bc6e9 | 1149 | NCI_DATA_FLOW_CONTROL_NOT_USED) |
4aeee687 | 1150 | atomic_dec(&conn_info->credits_cnt); |
6a2968aa | 1151 | |
20c239c1 JP |
1152 | pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n", |
1153 | nci_pbf(skb->data), | |
1154 | nci_conn_id(skb->data), | |
1155 | nci_plen(skb->data)); | |
6a2968aa | 1156 | |
1095e69f | 1157 | nci_send_frame(ndev, skb); |
c4bf98b2 IE |
1158 | |
1159 | mod_timer(&ndev->data_timer, | |
eb9bc6e9 | 1160 | jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT)); |
6a2968aa IE |
1161 | } |
1162 | } | |
1163 | ||
1164 | /* ----- NCI RX worker thread (data & control) ----- */ | |
1165 | ||
1166 | static void nci_rx_work(struct work_struct *work) | |
1167 | { | |
1168 | struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work); | |
1169 | struct sk_buff *skb; | |
1170 | ||
1171 | while ((skb = skb_dequeue(&ndev->rx_q))) { | |
05158296 HT |
1172 | |
1173 | /* Send copy to sniffer */ | |
1174 | nfc_send_to_raw_sock(ndev->nfc_dev, skb, | |
1175 | RAW_PAYLOAD_NCI, NFC_DIRECTION_RX); | |
1176 | ||
6a2968aa IE |
1177 | /* Process frame */ |
1178 | switch (nci_mt(skb->data)) { | |
1179 | case NCI_MT_RSP_PKT: | |
1180 | nci_rsp_packet(ndev, skb); | |
1181 | break; | |
1182 | ||
1183 | case NCI_MT_NTF_PKT: | |
1184 | nci_ntf_packet(ndev, skb); | |
1185 | break; | |
1186 | ||
1187 | case NCI_MT_DATA_PKT: | |
1188 | nci_rx_data_packet(ndev, skb); | |
1189 | break; | |
1190 | ||
1191 | default: | |
ed1e0ad8 | 1192 | pr_err("unknown MT 0x%x\n", nci_mt(skb->data)); |
6a2968aa IE |
1193 | kfree_skb(skb); |
1194 | break; | |
1195 | } | |
1196 | } | |
c4bf98b2 IE |
1197 | |
1198 | /* check if a data exchange timout has occurred */ | |
1199 | if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) { | |
1200 | /* complete the data exchange transaction, if exists */ | |
1201 | if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) | |
4aeee687 CR |
1202 | nci_data_exchange_complete(ndev, NULL, |
1203 | ndev->cur_conn_id, | |
1204 | -ETIMEDOUT); | |
c4bf98b2 IE |
1205 | |
1206 | clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); | |
1207 | } | |
6a2968aa IE |
1208 | } |
1209 | ||
1210 | /* ----- NCI TX CMD worker thread ----- */ | |
1211 | ||
1212 | static void nci_cmd_work(struct work_struct *work) | |
1213 | { | |
1214 | struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work); | |
1215 | struct sk_buff *skb; | |
1216 | ||
24bf3304 | 1217 | pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt)); |
6a2968aa IE |
1218 | |
1219 | /* Send queued command */ | |
1220 | if (atomic_read(&ndev->cmd_cnt)) { | |
1221 | skb = skb_dequeue(&ndev->cmd_q); | |
1222 | if (!skb) | |
1223 | return; | |
1224 | ||
1225 | atomic_dec(&ndev->cmd_cnt); | |
1226 | ||
20c239c1 JP |
1227 | pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", |
1228 | nci_pbf(skb->data), | |
1229 | nci_opcode_gid(nci_opcode(skb->data)), | |
1230 | nci_opcode_oid(nci_opcode(skb->data)), | |
1231 | nci_plen(skb->data)); | |
6a2968aa | 1232 | |
1095e69f | 1233 | nci_send_frame(ndev, skb); |
6a2968aa IE |
1234 | |
1235 | mod_timer(&ndev->cmd_timer, | |
eb9bc6e9 | 1236 | jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
6a2968aa IE |
1237 | } |
1238 | } | |
8a70e7f8 DJ |
1239 | |
1240 | MODULE_LICENSE("GPL"); |