Commit | Line | Data |
---|---|---|
4b10884e TE |
1 | /* |
2 | * NFC Digital Protocol stack | |
3 | * Copyright (c) 2013, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | */ | |
15 | ||
c5da0e4a SO |
16 | #define pr_fmt(fmt) "digital: %s: " fmt, __func__ |
17 | ||
4b10884e TE |
18 | #include <linux/module.h> |
19 | ||
20 | #include "digital.h" | |
21 | ||
59ee2361 | 22 | #define DIGITAL_PROTO_NFCA_RF_TECH \ |
7d0911c0 | 23 | (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | NFC_PROTO_NFC_DEP_MASK) |
59ee2361 | 24 | |
7d0911c0 TE |
25 | #define DIGITAL_PROTO_NFCF_RF_TECH \ |
26 | (NFC_PROTO_FELICA_MASK | NFC_PROTO_NFC_DEP_MASK) | |
8c0695e4 | 27 | |
59ee2361 TE |
28 | struct digital_cmd { |
29 | struct list_head queue; | |
30 | ||
31 | u8 type; | |
32 | u8 pending; | |
33 | ||
34 | u16 timeout; | |
35 | struct sk_buff *req; | |
36 | struct sk_buff *resp; | |
1c7a4c24 | 37 | struct digital_tg_mdaa_params *mdaa_params; |
59ee2361 TE |
38 | |
39 | nfc_digital_cmd_complete_t cmd_cb; | |
40 | void *cb_context; | |
41 | }; | |
42 | ||
43 | struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, | |
44 | unsigned int len) | |
45 | { | |
46 | struct sk_buff *skb; | |
47 | ||
48 | skb = alloc_skb(len + ddev->tx_headroom + ddev->tx_tailroom, | |
49 | GFP_KERNEL); | |
50 | if (skb) | |
51 | skb_reserve(skb, ddev->tx_headroom); | |
52 | ||
53 | return skb; | |
54 | } | |
55 | ||
2c66daec TE |
56 | void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init, |
57 | u8 bitwise_inv, u8 msb_first) | |
58 | { | |
59 | u16 crc; | |
60 | ||
61 | crc = crc_func(init, skb->data, skb->len); | |
62 | ||
63 | if (bitwise_inv) | |
64 | crc = ~crc; | |
65 | ||
66 | if (msb_first) | |
67 | crc = __fswab16(crc); | |
68 | ||
69 | *skb_put(skb, 1) = crc & 0xFF; | |
70 | *skb_put(skb, 1) = (crc >> 8) & 0xFF; | |
71 | } | |
72 | ||
73 | int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func, | |
74 | u16 crc_init, u8 bitwise_inv, u8 msb_first) | |
75 | { | |
76 | int rc; | |
77 | u16 crc; | |
78 | ||
79 | if (skb->len <= 2) | |
80 | return -EIO; | |
81 | ||
82 | crc = crc_func(crc_init, skb->data, skb->len - 2); | |
83 | ||
84 | if (bitwise_inv) | |
85 | crc = ~crc; | |
86 | ||
87 | if (msb_first) | |
88 | crc = __swab16(crc); | |
89 | ||
90 | rc = (skb->data[skb->len - 2] - (crc & 0xFF)) + | |
91 | (skb->data[skb->len - 1] - ((crc >> 8) & 0xFF)); | |
92 | ||
93 | if (rc) | |
94 | return -EIO; | |
95 | ||
96 | skb_trim(skb, skb->len - 2); | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
59ee2361 TE |
101 | static inline void digital_switch_rf(struct nfc_digital_dev *ddev, bool on) |
102 | { | |
103 | ddev->ops->switch_rf(ddev, on); | |
104 | } | |
105 | ||
106 | static inline void digital_abort_cmd(struct nfc_digital_dev *ddev) | |
107 | { | |
108 | ddev->ops->abort_cmd(ddev); | |
109 | } | |
110 | ||
111 | static void digital_wq_cmd_complete(struct work_struct *work) | |
112 | { | |
113 | struct digital_cmd *cmd; | |
114 | struct nfc_digital_dev *ddev = container_of(work, | |
115 | struct nfc_digital_dev, | |
116 | cmd_complete_work); | |
117 | ||
118 | mutex_lock(&ddev->cmd_lock); | |
119 | ||
120 | cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd, | |
121 | queue); | |
122 | if (!cmd) { | |
123 | mutex_unlock(&ddev->cmd_lock); | |
124 | return; | |
125 | } | |
126 | ||
127 | list_del(&cmd->queue); | |
128 | ||
129 | mutex_unlock(&ddev->cmd_lock); | |
130 | ||
131 | if (!IS_ERR(cmd->resp)) | |
132 | print_hex_dump_debug("DIGITAL RX: ", DUMP_PREFIX_NONE, 16, 1, | |
133 | cmd->resp->data, cmd->resp->len, false); | |
134 | ||
135 | cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp); | |
136 | ||
1c7a4c24 | 137 | kfree(cmd->mdaa_params); |
59ee2361 TE |
138 | kfree(cmd); |
139 | ||
140 | schedule_work(&ddev->cmd_work); | |
141 | } | |
142 | ||
143 | static void digital_send_cmd_complete(struct nfc_digital_dev *ddev, | |
144 | void *arg, struct sk_buff *resp) | |
145 | { | |
146 | struct digital_cmd *cmd = arg; | |
147 | ||
148 | cmd->resp = resp; | |
149 | ||
150 | schedule_work(&ddev->cmd_complete_work); | |
151 | } | |
152 | ||
153 | static void digital_wq_cmd(struct work_struct *work) | |
154 | { | |
155 | int rc; | |
156 | struct digital_cmd *cmd; | |
1c7a4c24 | 157 | struct digital_tg_mdaa_params *params; |
59ee2361 TE |
158 | struct nfc_digital_dev *ddev = container_of(work, |
159 | struct nfc_digital_dev, | |
160 | cmd_work); | |
161 | ||
162 | mutex_lock(&ddev->cmd_lock); | |
163 | ||
164 | cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd, | |
165 | queue); | |
166 | if (!cmd || cmd->pending) { | |
167 | mutex_unlock(&ddev->cmd_lock); | |
168 | return; | |
169 | } | |
170 | ||
171 | mutex_unlock(&ddev->cmd_lock); | |
172 | ||
173 | if (cmd->req) | |
174 | print_hex_dump_debug("DIGITAL TX: ", DUMP_PREFIX_NONE, 16, 1, | |
175 | cmd->req->data, cmd->req->len, false); | |
176 | ||
177 | switch (cmd->type) { | |
178 | case DIGITAL_CMD_IN_SEND: | |
179 | rc = ddev->ops->in_send_cmd(ddev, cmd->req, cmd->timeout, | |
180 | digital_send_cmd_complete, cmd); | |
181 | break; | |
1c7a4c24 TE |
182 | |
183 | case DIGITAL_CMD_TG_SEND: | |
184 | rc = ddev->ops->tg_send_cmd(ddev, cmd->req, cmd->timeout, | |
185 | digital_send_cmd_complete, cmd); | |
186 | break; | |
187 | ||
188 | case DIGITAL_CMD_TG_LISTEN: | |
189 | rc = ddev->ops->tg_listen(ddev, cmd->timeout, | |
190 | digital_send_cmd_complete, cmd); | |
191 | break; | |
192 | ||
193 | case DIGITAL_CMD_TG_LISTEN_MDAA: | |
194 | params = cmd->mdaa_params; | |
195 | ||
196 | rc = ddev->ops->tg_listen_mdaa(ddev, params, cmd->timeout, | |
197 | digital_send_cmd_complete, cmd); | |
198 | break; | |
199 | ||
59ee2361 | 200 | default: |
26042530 | 201 | pr_err("Unknown cmd type %d\n", cmd->type); |
59ee2361 TE |
202 | return; |
203 | } | |
204 | ||
205 | if (!rc) | |
206 | return; | |
207 | ||
26042530 | 208 | pr_err("in_send_command returned err %d\n", rc); |
59ee2361 TE |
209 | |
210 | mutex_lock(&ddev->cmd_lock); | |
211 | list_del(&cmd->queue); | |
212 | mutex_unlock(&ddev->cmd_lock); | |
213 | ||
214 | kfree_skb(cmd->req); | |
1c7a4c24 | 215 | kfree(cmd->mdaa_params); |
59ee2361 TE |
216 | kfree(cmd); |
217 | ||
218 | schedule_work(&ddev->cmd_work); | |
219 | } | |
220 | ||
221 | int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type, | |
1c7a4c24 TE |
222 | struct sk_buff *skb, struct digital_tg_mdaa_params *params, |
223 | u16 timeout, nfc_digital_cmd_complete_t cmd_cb, | |
224 | void *cb_context) | |
59ee2361 TE |
225 | { |
226 | struct digital_cmd *cmd; | |
227 | ||
228 | cmd = kzalloc(sizeof(struct digital_cmd), GFP_KERNEL); | |
229 | if (!cmd) | |
230 | return -ENOMEM; | |
231 | ||
232 | cmd->type = cmd_type; | |
233 | cmd->timeout = timeout; | |
234 | cmd->req = skb; | |
1c7a4c24 | 235 | cmd->mdaa_params = params; |
59ee2361 TE |
236 | cmd->cmd_cb = cmd_cb; |
237 | cmd->cb_context = cb_context; | |
238 | INIT_LIST_HEAD(&cmd->queue); | |
239 | ||
240 | mutex_lock(&ddev->cmd_lock); | |
241 | list_add_tail(&cmd->queue, &ddev->cmd_queue); | |
242 | mutex_unlock(&ddev->cmd_lock); | |
243 | ||
244 | schedule_work(&ddev->cmd_work); | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param) | |
250 | { | |
251 | int rc; | |
252 | ||
253 | rc = ddev->ops->in_configure_hw(ddev, type, param); | |
254 | if (rc) | |
26042530 | 255 | pr_err("in_configure_hw failed: %d\n", rc); |
59ee2361 TE |
256 | |
257 | return rc; | |
258 | } | |
259 | ||
1c7a4c24 TE |
260 | int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param) |
261 | { | |
262 | int rc; | |
263 | ||
264 | rc = ddev->ops->tg_configure_hw(ddev, type, param); | |
265 | if (rc) | |
26042530 | 266 | pr_err("tg_configure_hw failed: %d\n", rc); |
1c7a4c24 TE |
267 | |
268 | return rc; | |
269 | } | |
270 | ||
271 | static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech) | |
272 | { | |
273 | struct digital_tg_mdaa_params *params; | |
274 | ||
275 | params = kzalloc(sizeof(struct digital_tg_mdaa_params), GFP_KERNEL); | |
276 | if (!params) | |
277 | return -ENOMEM; | |
278 | ||
279 | params->sens_res = DIGITAL_SENS_RES_NFC_DEP; | |
280 | get_random_bytes(params->nfcid1, sizeof(params->nfcid1)); | |
281 | params->sel_res = DIGITAL_SEL_RES_NFC_DEP; | |
282 | ||
283 | params->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
284 | params->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
285 | get_random_bytes(params->nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2); | |
286 | params->sc = DIGITAL_SENSF_FELICA_SC; | |
287 | ||
288 | return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MDAA, NULL, params, | |
289 | 500, digital_tg_recv_atr_req, NULL); | |
290 | } | |
291 | ||
2c66daec TE |
292 | int digital_target_found(struct nfc_digital_dev *ddev, |
293 | struct nfc_target *target, u8 protocol) | |
294 | { | |
295 | int rc; | |
296 | u8 framing; | |
297 | u8 rf_tech; | |
298 | int (*check_crc)(struct sk_buff *skb); | |
299 | void (*add_crc)(struct sk_buff *skb); | |
300 | ||
301 | rf_tech = ddev->poll_techs[ddev->poll_tech_index].rf_tech; | |
302 | ||
303 | switch (protocol) { | |
304 | case NFC_PROTO_JEWEL: | |
305 | framing = NFC_DIGITAL_FRAMING_NFCA_T1T; | |
306 | check_crc = digital_skb_check_crc_b; | |
307 | add_crc = digital_skb_add_crc_b; | |
308 | break; | |
309 | ||
310 | case NFC_PROTO_MIFARE: | |
311 | framing = NFC_DIGITAL_FRAMING_NFCA_T2T; | |
312 | check_crc = digital_skb_check_crc_a; | |
313 | add_crc = digital_skb_add_crc_a; | |
314 | break; | |
315 | ||
8c0695e4 TE |
316 | case NFC_PROTO_FELICA: |
317 | framing = NFC_DIGITAL_FRAMING_NFCF_T3T; | |
318 | check_crc = digital_skb_check_crc_f; | |
319 | add_crc = digital_skb_add_crc_f; | |
320 | break; | |
321 | ||
7d0911c0 TE |
322 | case NFC_PROTO_NFC_DEP: |
323 | if (rf_tech == NFC_DIGITAL_RF_TECH_106A) { | |
324 | framing = NFC_DIGITAL_FRAMING_NFCA_NFC_DEP; | |
325 | check_crc = digital_skb_check_crc_a; | |
326 | add_crc = digital_skb_add_crc_a; | |
327 | } else { | |
328 | framing = NFC_DIGITAL_FRAMING_NFCF_NFC_DEP; | |
329 | check_crc = digital_skb_check_crc_f; | |
330 | add_crc = digital_skb_add_crc_f; | |
331 | } | |
332 | break; | |
333 | ||
2c66daec | 334 | default: |
26042530 | 335 | pr_err("Invalid protocol %d\n", protocol); |
2c66daec TE |
336 | return -EINVAL; |
337 | } | |
338 | ||
26042530 | 339 | pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol); |
2c66daec TE |
340 | |
341 | ddev->curr_rf_tech = rf_tech; | |
342 | ddev->curr_protocol = protocol; | |
343 | ||
344 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
345 | ddev->skb_add_crc = digital_skb_add_crc_none; | |
346 | ddev->skb_check_crc = digital_skb_check_crc_none; | |
347 | } else { | |
348 | ddev->skb_add_crc = add_crc; | |
349 | ddev->skb_check_crc = check_crc; | |
350 | } | |
351 | ||
352 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing); | |
353 | if (rc) | |
354 | return rc; | |
355 | ||
356 | target->supported_protocols = (1 << protocol); | |
357 | rc = nfc_targets_found(ddev->nfc_dev, target, 1); | |
358 | if (rc) | |
359 | return rc; | |
360 | ||
361 | ddev->poll_tech_count = 0; | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
59ee2361 TE |
366 | void digital_poll_next_tech(struct nfc_digital_dev *ddev) |
367 | { | |
368 | digital_switch_rf(ddev, 0); | |
369 | ||
370 | mutex_lock(&ddev->poll_lock); | |
371 | ||
372 | if (!ddev->poll_tech_count) { | |
373 | mutex_unlock(&ddev->poll_lock); | |
374 | return; | |
375 | } | |
376 | ||
377 | ddev->poll_tech_index = (ddev->poll_tech_index + 1) % | |
378 | ddev->poll_tech_count; | |
379 | ||
380 | mutex_unlock(&ddev->poll_lock); | |
381 | ||
382 | schedule_work(&ddev->poll_work); | |
383 | } | |
384 | ||
385 | static void digital_wq_poll(struct work_struct *work) | |
386 | { | |
387 | int rc; | |
388 | struct digital_poll_tech *poll_tech; | |
389 | struct nfc_digital_dev *ddev = container_of(work, | |
390 | struct nfc_digital_dev, | |
391 | poll_work); | |
392 | mutex_lock(&ddev->poll_lock); | |
393 | ||
394 | if (!ddev->poll_tech_count) { | |
395 | mutex_unlock(&ddev->poll_lock); | |
396 | return; | |
397 | } | |
398 | ||
399 | poll_tech = &ddev->poll_techs[ddev->poll_tech_index]; | |
400 | ||
401 | mutex_unlock(&ddev->poll_lock); | |
402 | ||
403 | rc = poll_tech->poll_func(ddev, poll_tech->rf_tech); | |
404 | if (rc) | |
405 | digital_poll_next_tech(ddev); | |
406 | } | |
407 | ||
408 | static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech, | |
409 | digital_poll_t poll_func) | |
410 | { | |
411 | struct digital_poll_tech *poll_tech; | |
412 | ||
413 | if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX) | |
414 | return; | |
415 | ||
416 | poll_tech = &ddev->poll_techs[ddev->poll_tech_count++]; | |
417 | ||
418 | poll_tech->rf_tech = rf_tech; | |
419 | poll_tech->poll_func = poll_func; | |
420 | } | |
421 | ||
422 | /** | |
423 | * start_poll operation | |
424 | * | |
425 | * For every supported protocol, the corresponding polling function is added | |
426 | * to the table of polling technologies (ddev->poll_techs[]) using | |
427 | * digital_add_poll_tech(). | |
428 | * When a polling function fails (by timeout or protocol error) the next one is | |
429 | * schedule by digital_poll_next_tech() on the poll workqueue (ddev->poll_work). | |
430 | */ | |
4b10884e TE |
431 | static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols, |
432 | __u32 tm_protocols) | |
433 | { | |
59ee2361 TE |
434 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
435 | u32 matching_im_protocols, matching_tm_protocols; | |
436 | ||
26042530 | 437 | pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols, |
c5da0e4a | 438 | tm_protocols, ddev->protocols); |
59ee2361 TE |
439 | |
440 | matching_im_protocols = ddev->protocols & im_protocols; | |
441 | matching_tm_protocols = ddev->protocols & tm_protocols; | |
442 | ||
443 | if (!matching_im_protocols && !matching_tm_protocols) { | |
26042530 | 444 | pr_err("Unknown protocol\n"); |
59ee2361 TE |
445 | return -EINVAL; |
446 | } | |
447 | ||
448 | if (ddev->poll_tech_count) { | |
26042530 | 449 | pr_err("Already polling\n"); |
59ee2361 TE |
450 | return -EBUSY; |
451 | } | |
452 | ||
453 | if (ddev->curr_protocol) { | |
26042530 | 454 | pr_err("A target is already active\n"); |
59ee2361 TE |
455 | return -EBUSY; |
456 | } | |
457 | ||
458 | ddev->poll_tech_count = 0; | |
459 | ddev->poll_tech_index = 0; | |
460 | ||
461 | if (matching_im_protocols & DIGITAL_PROTO_NFCA_RF_TECH) | |
462 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, | |
463 | digital_in_send_sens_req); | |
464 | ||
8c0695e4 TE |
465 | if (im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) { |
466 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, | |
467 | digital_in_send_sensf_req); | |
468 | ||
469 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, | |
470 | digital_in_send_sensf_req); | |
471 | } | |
472 | ||
1c7a4c24 TE |
473 | if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { |
474 | if (ddev->ops->tg_listen_mdaa) { | |
475 | digital_add_poll_tech(ddev, 0, | |
476 | digital_tg_listen_mdaa); | |
477 | } else { | |
478 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, | |
479 | digital_tg_listen_nfca); | |
480 | ||
481 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, | |
482 | digital_tg_listen_nfcf); | |
483 | ||
484 | digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, | |
485 | digital_tg_listen_nfcf); | |
486 | } | |
487 | } | |
488 | ||
59ee2361 | 489 | if (!ddev->poll_tech_count) { |
26042530 | 490 | pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n", |
59ee2361 TE |
491 | matching_im_protocols, matching_tm_protocols); |
492 | return -EINVAL; | |
493 | } | |
494 | ||
495 | schedule_work(&ddev->poll_work); | |
496 | ||
497 | return 0; | |
4b10884e TE |
498 | } |
499 | ||
500 | static void digital_stop_poll(struct nfc_dev *nfc_dev) | |
501 | { | |
59ee2361 TE |
502 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
503 | ||
504 | mutex_lock(&ddev->poll_lock); | |
505 | ||
506 | if (!ddev->poll_tech_count) { | |
26042530 | 507 | pr_err("Polling operation was not running\n"); |
59ee2361 TE |
508 | mutex_unlock(&ddev->poll_lock); |
509 | return; | |
510 | } | |
511 | ||
512 | ddev->poll_tech_count = 0; | |
513 | ||
514 | mutex_unlock(&ddev->poll_lock); | |
515 | ||
516 | cancel_work_sync(&ddev->poll_work); | |
517 | ||
518 | digital_abort_cmd(ddev); | |
4b10884e TE |
519 | } |
520 | ||
521 | static int digital_dev_up(struct nfc_dev *nfc_dev) | |
522 | { | |
59ee2361 TE |
523 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
524 | ||
525 | digital_switch_rf(ddev, 1); | |
526 | ||
527 | return 0; | |
4b10884e TE |
528 | } |
529 | ||
530 | static int digital_dev_down(struct nfc_dev *nfc_dev) | |
531 | { | |
59ee2361 TE |
532 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
533 | ||
534 | digital_switch_rf(ddev, 0); | |
535 | ||
536 | return 0; | |
4b10884e TE |
537 | } |
538 | ||
539 | static int digital_dep_link_up(struct nfc_dev *nfc_dev, | |
540 | struct nfc_target *target, | |
541 | __u8 comm_mode, __u8 *gb, size_t gb_len) | |
542 | { | |
7d0911c0 TE |
543 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
544 | ||
545 | return digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len); | |
4b10884e TE |
546 | } |
547 | ||
548 | static int digital_dep_link_down(struct nfc_dev *nfc_dev) | |
549 | { | |
7d0911c0 TE |
550 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
551 | ||
552 | ddev->curr_protocol = 0; | |
553 | ||
554 | return 0; | |
4b10884e TE |
555 | } |
556 | ||
557 | static int digital_activate_target(struct nfc_dev *nfc_dev, | |
558 | struct nfc_target *target, __u32 protocol) | |
559 | { | |
59ee2361 | 560 | return 0; |
4b10884e TE |
561 | } |
562 | ||
563 | static void digital_deactivate_target(struct nfc_dev *nfc_dev, | |
564 | struct nfc_target *target) | |
565 | { | |
59ee2361 TE |
566 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
567 | ||
568 | ddev->curr_protocol = 0; | |
4b10884e TE |
569 | } |
570 | ||
571 | static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb) | |
572 | { | |
1c7a4c24 TE |
573 | struct nfc_digital_dev *ddev = nfc_get_drvdata(dev); |
574 | ||
575 | return digital_tg_send_dep_res(ddev, skb); | |
4b10884e TE |
576 | } |
577 | ||
2c66daec TE |
578 | static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg, |
579 | struct sk_buff *resp) | |
580 | { | |
581 | struct digital_data_exch *data_exch = arg; | |
582 | int rc; | |
583 | ||
584 | if (IS_ERR(resp)) { | |
585 | rc = PTR_ERR(resp); | |
586 | goto done; | |
587 | } | |
588 | ||
589 | if (ddev->curr_protocol == NFC_PROTO_MIFARE) | |
590 | rc = digital_in_recv_mifare_res(resp); | |
591 | else | |
592 | rc = ddev->skb_check_crc(resp); | |
593 | ||
594 | if (rc) { | |
595 | kfree_skb(resp); | |
596 | resp = NULL; | |
597 | } | |
598 | ||
599 | done: | |
600 | data_exch->cb(data_exch->cb_context, resp, rc); | |
601 | ||
602 | kfree(data_exch); | |
603 | } | |
604 | ||
4b10884e TE |
605 | static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target, |
606 | struct sk_buff *skb, data_exchange_cb_t cb, | |
607 | void *cb_context) | |
608 | { | |
2c66daec TE |
609 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
610 | struct digital_data_exch *data_exch; | |
611 | ||
612 | data_exch = kzalloc(sizeof(struct digital_data_exch), GFP_KERNEL); | |
613 | if (!data_exch) { | |
26042530 | 614 | pr_err("Failed to allocate data_exch struct\n"); |
2c66daec TE |
615 | return -ENOMEM; |
616 | } | |
617 | ||
618 | data_exch->cb = cb; | |
619 | data_exch->cb_context = cb_context; | |
620 | ||
7d0911c0 TE |
621 | if (ddev->curr_protocol == NFC_PROTO_NFC_DEP) |
622 | return digital_in_send_dep_req(ddev, target, skb, data_exch); | |
623 | ||
2c66daec TE |
624 | ddev->skb_add_crc(skb); |
625 | ||
626 | return digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete, | |
627 | data_exch); | |
4b10884e TE |
628 | } |
629 | ||
630 | static struct nfc_ops digital_nfc_ops = { | |
631 | .dev_up = digital_dev_up, | |
632 | .dev_down = digital_dev_down, | |
633 | .start_poll = digital_start_poll, | |
634 | .stop_poll = digital_stop_poll, | |
635 | .dep_link_up = digital_dep_link_up, | |
636 | .dep_link_down = digital_dep_link_down, | |
637 | .activate_target = digital_activate_target, | |
638 | .deactivate_target = digital_deactivate_target, | |
639 | .tm_send = digital_tg_send, | |
640 | .im_transceive = digital_in_send, | |
641 | }; | |
642 | ||
643 | struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops, | |
644 | __u32 supported_protocols, | |
645 | __u32 driver_capabilities, | |
646 | int tx_headroom, int tx_tailroom) | |
647 | { | |
648 | struct nfc_digital_dev *ddev; | |
649 | ||
650 | if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen || | |
651 | !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd || | |
652 | !ops->switch_rf) | |
653 | return NULL; | |
654 | ||
655 | ddev = kzalloc(sizeof(struct nfc_digital_dev), GFP_KERNEL); | |
26042530 | 656 | if (!ddev) |
4b10884e | 657 | return NULL; |
4b10884e TE |
658 | |
659 | ddev->driver_capabilities = driver_capabilities; | |
660 | ddev->ops = ops; | |
661 | ||
59ee2361 TE |
662 | mutex_init(&ddev->cmd_lock); |
663 | INIT_LIST_HEAD(&ddev->cmd_queue); | |
664 | ||
665 | INIT_WORK(&ddev->cmd_work, digital_wq_cmd); | |
666 | INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete); | |
667 | ||
668 | mutex_init(&ddev->poll_lock); | |
669 | INIT_WORK(&ddev->poll_work, digital_wq_poll); | |
670 | ||
671 | if (supported_protocols & NFC_PROTO_JEWEL_MASK) | |
672 | ddev->protocols |= NFC_PROTO_JEWEL_MASK; | |
673 | if (supported_protocols & NFC_PROTO_MIFARE_MASK) | |
674 | ddev->protocols |= NFC_PROTO_MIFARE_MASK; | |
8c0695e4 TE |
675 | if (supported_protocols & NFC_PROTO_FELICA_MASK) |
676 | ddev->protocols |= NFC_PROTO_FELICA_MASK; | |
7d0911c0 TE |
677 | if (supported_protocols & NFC_PROTO_NFC_DEP_MASK) |
678 | ddev->protocols |= NFC_PROTO_NFC_DEP_MASK; | |
59ee2361 TE |
679 | |
680 | ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN; | |
681 | ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN; | |
4b10884e TE |
682 | |
683 | ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols, | |
684 | ddev->tx_headroom, | |
685 | ddev->tx_tailroom); | |
686 | if (!ddev->nfc_dev) { | |
26042530 | 687 | pr_err("nfc_allocate_device failed\n"); |
4b10884e TE |
688 | goto free_dev; |
689 | } | |
690 | ||
691 | nfc_set_drvdata(ddev->nfc_dev, ddev); | |
692 | ||
693 | return ddev; | |
694 | ||
695 | free_dev: | |
696 | kfree(ddev); | |
697 | ||
698 | return NULL; | |
699 | } | |
700 | EXPORT_SYMBOL(nfc_digital_allocate_device); | |
701 | ||
702 | void nfc_digital_free_device(struct nfc_digital_dev *ddev) | |
703 | { | |
704 | nfc_free_device(ddev->nfc_dev); | |
4b10884e TE |
705 | kfree(ddev); |
706 | } | |
707 | EXPORT_SYMBOL(nfc_digital_free_device); | |
708 | ||
709 | int nfc_digital_register_device(struct nfc_digital_dev *ddev) | |
710 | { | |
711 | return nfc_register_device(ddev->nfc_dev); | |
712 | } | |
713 | EXPORT_SYMBOL(nfc_digital_register_device); | |
714 | ||
715 | void nfc_digital_unregister_device(struct nfc_digital_dev *ddev) | |
716 | { | |
59ee2361 TE |
717 | struct digital_cmd *cmd, *n; |
718 | ||
4b10884e | 719 | nfc_unregister_device(ddev->nfc_dev); |
59ee2361 TE |
720 | |
721 | mutex_lock(&ddev->poll_lock); | |
722 | ddev->poll_tech_count = 0; | |
723 | mutex_unlock(&ddev->poll_lock); | |
724 | ||
725 | cancel_work_sync(&ddev->poll_work); | |
726 | cancel_work_sync(&ddev->cmd_work); | |
727 | cancel_work_sync(&ddev->cmd_complete_work); | |
728 | ||
729 | list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) { | |
730 | list_del(&cmd->queue); | |
1c7a4c24 | 731 | kfree(cmd->mdaa_params); |
59ee2361 TE |
732 | kfree(cmd); |
733 | } | |
4b10884e TE |
734 | } |
735 | EXPORT_SYMBOL(nfc_digital_unregister_device); | |
736 | ||
737 | MODULE_LICENSE("GPL"); |