1
2
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5
6
7#define pr_fmt(fmt) "digital: %s: " fmt, __func__
8
9#include <linux/module.h>
10
11#include "digital.h"
12
13#define DIGITAL_PROTO_NFCA_RF_TECH \
14 (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | \
15 NFC_PROTO_NFC_DEP_MASK | NFC_PROTO_ISO14443_MASK)
16
17#define DIGITAL_PROTO_NFCB_RF_TECH NFC_PROTO_ISO14443_B_MASK
18
19#define DIGITAL_PROTO_NFCF_RF_TECH \
20 (NFC_PROTO_FELICA_MASK | NFC_PROTO_NFC_DEP_MASK)
21
22#define DIGITAL_PROTO_ISO15693_RF_TECH NFC_PROTO_ISO15693_MASK
23
24
25#define DIGITAL_POLL_INTERVAL 10
26
27struct digital_cmd {
28 struct list_head queue;
29
30 u8 type;
31 u8 pending;
32
33 u16 timeout;
34 struct sk_buff *req;
35 struct sk_buff *resp;
36 struct digital_tg_mdaa_params *mdaa_params;
37
38 nfc_digital_cmd_complete_t cmd_cb;
39 void *cb_context;
40};
41
42struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev,
43 unsigned int len)
44{
45 struct sk_buff *skb;
46
47 skb = alloc_skb(len + ddev->tx_headroom + ddev->tx_tailroom,
48 GFP_KERNEL);
49 if (skb)
50 skb_reserve(skb, ddev->tx_headroom);
51
52 return skb;
53}
54
55void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
56 u8 bitwise_inv, u8 msb_first)
57{
58 u16 crc;
59
60 crc = crc_func(init, skb->data, skb->len);
61
62 if (bitwise_inv)
63 crc = ~crc;
64
65 if (msb_first)
66 crc = __fswab16(crc);
67
68 skb_put_u8(skb, crc & 0xFF);
69 skb_put_u8(skb, (crc >> 8) & 0xFF);
70}
71
72int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
73 u16 crc_init, u8 bitwise_inv, u8 msb_first)
74{
75 int rc;
76 u16 crc;
77
78 if (skb->len <= 2)
79 return -EIO;
80
81 crc = crc_func(crc_init, skb->data, skb->len - 2);
82
83 if (bitwise_inv)
84 crc = ~crc;
85
86 if (msb_first)
87 crc = __swab16(crc);
88
89 rc = (skb->data[skb->len - 2] - (crc & 0xFF)) +
90 (skb->data[skb->len - 1] - ((crc >> 8) & 0xFF));
91
92 if (rc)
93 return -EIO;
94
95 skb_trim(skb, skb->len - 2);
96
97 return 0;
98}
99
100static inline void digital_switch_rf(struct nfc_digital_dev *ddev, bool on)
101{
102 ddev->ops->switch_rf(ddev, on);
103}
104
105static inline void digital_abort_cmd(struct nfc_digital_dev *ddev)
106{
107 ddev->ops->abort_cmd(ddev);
108}
109
110static void digital_wq_cmd_complete(struct work_struct *work)
111{
112 struct digital_cmd *cmd;
113 struct nfc_digital_dev *ddev = container_of(work,
114 struct nfc_digital_dev,
115 cmd_complete_work);
116
117 mutex_lock(&ddev->cmd_lock);
118
119 cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd,
120 queue);
121 if (!cmd) {
122 mutex_unlock(&ddev->cmd_lock);
123 return;
124 }
125
126 list_del(&cmd->queue);
127
128 mutex_unlock(&ddev->cmd_lock);
129
130 if (!IS_ERR(cmd->resp))
131 print_hex_dump_debug("DIGITAL RX: ", DUMP_PREFIX_NONE, 16, 1,
132 cmd->resp->data, cmd->resp->len, false);
133
134 cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp);
135
136 kfree(cmd->mdaa_params);
137 kfree(cmd);
138
139 schedule_work(&ddev->cmd_work);
140}
141
142static void digital_send_cmd_complete(struct nfc_digital_dev *ddev,
143 void *arg, struct sk_buff *resp)
144{
145 struct digital_cmd *cmd = arg;
146
147 cmd->resp = resp;
148
149 schedule_work(&ddev->cmd_complete_work);
150}
151
152static void digital_wq_cmd(struct work_struct *work)
153{
154 int rc;
155 struct digital_cmd *cmd;
156 struct digital_tg_mdaa_params *params;
157 struct nfc_digital_dev *ddev = container_of(work,
158 struct nfc_digital_dev,
159 cmd_work);
160
161 mutex_lock(&ddev->cmd_lock);
162
163 cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd,
164 queue);
165 if (!cmd || cmd->pending) {
166 mutex_unlock(&ddev->cmd_lock);
167 return;
168 }
169
170 cmd->pending = 1;
171
172 mutex_unlock(&ddev->cmd_lock);
173
174 if (cmd->req)
175 print_hex_dump_debug("DIGITAL TX: ", DUMP_PREFIX_NONE, 16, 1,
176 cmd->req->data, cmd->req->len, false);
177
178 switch (cmd->type) {
179 case DIGITAL_CMD_IN_SEND:
180 rc = ddev->ops->in_send_cmd(ddev, cmd->req, cmd->timeout,
181 digital_send_cmd_complete, cmd);
182 break;
183
184 case DIGITAL_CMD_TG_SEND:
185 rc = ddev->ops->tg_send_cmd(ddev, cmd->req, cmd->timeout,
186 digital_send_cmd_complete, cmd);
187 break;
188
189 case DIGITAL_CMD_TG_LISTEN:
190 rc = ddev->ops->tg_listen(ddev, cmd->timeout,
191 digital_send_cmd_complete, cmd);
192 break;
193
194 case DIGITAL_CMD_TG_LISTEN_MDAA:
195 params = cmd->mdaa_params;
196
197 rc = ddev->ops->tg_listen_mdaa(ddev, params, cmd->timeout,
198 digital_send_cmd_complete, cmd);
199 break;
200
201 case DIGITAL_CMD_TG_LISTEN_MD:
202 rc = ddev->ops->tg_listen_md(ddev, cmd->timeout,
203 digital_send_cmd_complete, cmd);
204 break;
205
206 default:
207 pr_err("Unknown cmd type %d\n", cmd->type);
208 return;
209 }
210
211 if (!rc)
212 return;
213
214 pr_err("in_send_command returned err %d\n", rc);
215
216 mutex_lock(&ddev->cmd_lock);
217 list_del(&cmd->queue);
218 mutex_unlock(&ddev->cmd_lock);
219
220 kfree_skb(cmd->req);
221 kfree(cmd->mdaa_params);
222 kfree(cmd);
223
224 schedule_work(&ddev->cmd_work);
225}
226
227int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
228 struct sk_buff *skb, struct digital_tg_mdaa_params *params,
229 u16 timeout, nfc_digital_cmd_complete_t cmd_cb,
230 void *cb_context)
231{
232 struct digital_cmd *cmd;
233
234 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
235 if (!cmd)
236 return -ENOMEM;
237
238 cmd->type = cmd_type;
239 cmd->timeout = timeout;
240 cmd->req = skb;
241 cmd->mdaa_params = params;
242 cmd->cmd_cb = cmd_cb;
243 cmd->cb_context = cb_context;
244 INIT_LIST_HEAD(&cmd->queue);
245
246 mutex_lock(&ddev->cmd_lock);
247 list_add_tail(&cmd->queue, &ddev->cmd_queue);
248 mutex_unlock(&ddev->cmd_lock);
249
250 schedule_work(&ddev->cmd_work);
251
252 return 0;
253}
254
255int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
256{
257 int rc;
258
259 rc = ddev->ops->in_configure_hw(ddev, type, param);
260 if (rc)
261 pr_err("in_configure_hw failed: %d\n", rc);
262
263 return rc;
264}
265
266int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
267{
268 int rc;
269
270 rc = ddev->ops->tg_configure_hw(ddev, type, param);
271 if (rc)
272 pr_err("tg_configure_hw failed: %d\n", rc);
273
274 return rc;
275}
276
277static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech)
278{
279 struct digital_tg_mdaa_params *params;
280
281 params = kzalloc(sizeof(*params), GFP_KERNEL);
282 if (!params)
283 return -ENOMEM;
284
285 params->sens_res = DIGITAL_SENS_RES_NFC_DEP;
286 get_random_bytes(params->nfcid1, sizeof(params->nfcid1));
287 params->sel_res = DIGITAL_SEL_RES_NFC_DEP;
288
289 params->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
290 params->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
291 get_random_bytes(params->nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2);
292 params->sc = DIGITAL_SENSF_FELICA_SC;
293
294 return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MDAA, NULL, params,
295 500, digital_tg_recv_atr_req, NULL);
296}
297
298static int digital_tg_listen_md(struct nfc_digital_dev *ddev, u8 rf_tech)
299{
300 return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MD, NULL, NULL, 500,
301 digital_tg_recv_md_req, NULL);
302}
303
304int digital_target_found(struct nfc_digital_dev *ddev,
305 struct nfc_target *target, u8 protocol)
306{
307 int rc;
308 u8 framing;
309 u8 rf_tech;
310 u8 poll_tech_count;
311 int (*check_crc)(struct sk_buff *skb);
312 void (*add_crc)(struct sk_buff *skb);
313
314 rf_tech = ddev->poll_techs[ddev->poll_tech_index].rf_tech;
315
316 switch (protocol) {
317 case NFC_PROTO_JEWEL:
318 framing = NFC_DIGITAL_FRAMING_NFCA_T1T;
319 check_crc = digital_skb_check_crc_b;
320 add_crc = digital_skb_add_crc_b;
321 break;
322
323 case NFC_PROTO_MIFARE:
324 framing = NFC_DIGITAL_FRAMING_NFCA_T2T;
325 check_crc = digital_skb_check_crc_a;
326 add_crc = digital_skb_add_crc_a;
327 break;
328
329 case NFC_PROTO_FELICA:
330 framing = NFC_DIGITAL_FRAMING_NFCF_T3T;
331 check_crc = digital_skb_check_crc_f;
332 add_crc = digital_skb_add_crc_f;
333 break;
334
335 case NFC_PROTO_NFC_DEP:
336 if (rf_tech == NFC_DIGITAL_RF_TECH_106A) {
337 framing = NFC_DIGITAL_FRAMING_NFCA_NFC_DEP;
338 check_crc = digital_skb_check_crc_a;
339 add_crc = digital_skb_add_crc_a;
340 } else {
341 framing = NFC_DIGITAL_FRAMING_NFCF_NFC_DEP;
342 check_crc = digital_skb_check_crc_f;
343 add_crc = digital_skb_add_crc_f;
344 }
345 break;
346
347 case NFC_PROTO_ISO15693:
348 framing = NFC_DIGITAL_FRAMING_ISO15693_T5T;
349 check_crc = digital_skb_check_crc_b;
350 add_crc = digital_skb_add_crc_b;
351 break;
352
353 case NFC_PROTO_ISO14443:
354 framing = NFC_DIGITAL_FRAMING_NFCA_T4T;
355 check_crc = digital_skb_check_crc_a;
356 add_crc = digital_skb_add_crc_a;
357 break;
358
359 case NFC_PROTO_ISO14443_B:
360 framing = NFC_DIGITAL_FRAMING_NFCB_T4T;
361 check_crc = digital_skb_check_crc_b;
362 add_crc = digital_skb_add_crc_b;
363 break;
364
365 default:
366 pr_err("Invalid protocol %d\n", protocol);
367 return -EINVAL;
368 }
369
370 pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol);
371
372 ddev->curr_rf_tech = rf_tech;
373
374 if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
375 ddev->skb_add_crc = digital_skb_add_crc_none;
376 ddev->skb_check_crc = digital_skb_check_crc_none;
377 } else {
378 ddev->skb_add_crc = add_crc;
379 ddev->skb_check_crc = check_crc;
380 }
381
382 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing);
383 if (rc)
384 return rc;
385
386 target->supported_protocols = (1 << protocol);
387
388 poll_tech_count = ddev->poll_tech_count;
389 ddev->poll_tech_count = 0;
390
391 rc = nfc_targets_found(ddev->nfc_dev, target, 1);
392 if (rc) {
393 ddev->poll_tech_count = poll_tech_count;
394 return rc;
395 }
396
397 return 0;
398}
399
400void digital_poll_next_tech(struct nfc_digital_dev *ddev)
401{
402 u8 rand_mod;
403
404 digital_switch_rf(ddev, 0);
405
406 mutex_lock(&ddev->poll_lock);
407
408 if (!ddev->poll_tech_count) {
409 mutex_unlock(&ddev->poll_lock);
410 return;
411 }
412
413 get_random_bytes(&rand_mod, sizeof(rand_mod));
414 ddev->poll_tech_index = rand_mod % ddev->poll_tech_count;
415
416 mutex_unlock(&ddev->poll_lock);
417
418 schedule_delayed_work(&ddev->poll_work,
419 msecs_to_jiffies(DIGITAL_POLL_INTERVAL));
420}
421
422static void digital_wq_poll(struct work_struct *work)
423{
424 int rc;
425 struct digital_poll_tech *poll_tech;
426 struct nfc_digital_dev *ddev = container_of(work,
427 struct nfc_digital_dev,
428 poll_work.work);
429 mutex_lock(&ddev->poll_lock);
430
431 if (!ddev->poll_tech_count) {
432 mutex_unlock(&ddev->poll_lock);
433 return;
434 }
435
436 poll_tech = &ddev->poll_techs[ddev->poll_tech_index];
437
438 mutex_unlock(&ddev->poll_lock);
439
440 rc = poll_tech->poll_func(ddev, poll_tech->rf_tech);
441 if (rc)
442 digital_poll_next_tech(ddev);
443}
444
445static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech,
446 digital_poll_t poll_func)
447{
448 struct digital_poll_tech *poll_tech;
449
450 if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX)
451 return;
452
453 poll_tech = &ddev->poll_techs[ddev->poll_tech_count++];
454
455 poll_tech->rf_tech = rf_tech;
456 poll_tech->poll_func = poll_func;
457}
458
459
460
461
462
463
464
465
466
467
468
469
470
471static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols,
472 __u32 tm_protocols)
473{
474 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
475 u32 matching_im_protocols, matching_tm_protocols;
476
477 pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols,
478 tm_protocols, ddev->protocols);
479
480 matching_im_protocols = ddev->protocols & im_protocols;
481 matching_tm_protocols = ddev->protocols & tm_protocols;
482
483 if (!matching_im_protocols && !matching_tm_protocols) {
484 pr_err("Unknown protocol\n");
485 return -EINVAL;
486 }
487
488 if (ddev->poll_tech_count) {
489 pr_err("Already polling\n");
490 return -EBUSY;
491 }
492
493 if (ddev->curr_protocol) {
494 pr_err("A target is already active\n");
495 return -EBUSY;
496 }
497
498 ddev->poll_tech_count = 0;
499 ddev->poll_tech_index = 0;
500
501 if (matching_im_protocols & DIGITAL_PROTO_NFCA_RF_TECH)
502 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
503 digital_in_send_sens_req);
504
505 if (matching_im_protocols & DIGITAL_PROTO_NFCB_RF_TECH)
506 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106B,
507 digital_in_send_sensb_req);
508
509 if (matching_im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) {
510 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
511 digital_in_send_sensf_req);
512
513 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F,
514 digital_in_send_sensf_req);
515 }
516
517 if (matching_im_protocols & DIGITAL_PROTO_ISO15693_RF_TECH)
518 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_ISO15693,
519 digital_in_send_iso15693_inv_req);
520
521 if (matching_tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
522 if (ddev->ops->tg_listen_mdaa) {
523 digital_add_poll_tech(ddev, 0,
524 digital_tg_listen_mdaa);
525 } else if (ddev->ops->tg_listen_md) {
526 digital_add_poll_tech(ddev, 0,
527 digital_tg_listen_md);
528 } else {
529 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
530 digital_tg_listen_nfca);
531
532 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
533 digital_tg_listen_nfcf);
534
535 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F,
536 digital_tg_listen_nfcf);
537 }
538 }
539
540 if (!ddev->poll_tech_count) {
541 pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n",
542 matching_im_protocols, matching_tm_protocols);
543 return -EINVAL;
544 }
545
546 schedule_delayed_work(&ddev->poll_work, 0);
547
548 return 0;
549}
550
551static void digital_stop_poll(struct nfc_dev *nfc_dev)
552{
553 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
554
555 mutex_lock(&ddev->poll_lock);
556
557 if (!ddev->poll_tech_count) {
558 pr_err("Polling operation was not running\n");
559 mutex_unlock(&ddev->poll_lock);
560 return;
561 }
562
563 ddev->poll_tech_count = 0;
564
565 mutex_unlock(&ddev->poll_lock);
566
567 cancel_delayed_work_sync(&ddev->poll_work);
568
569 digital_abort_cmd(ddev);
570}
571
572static int digital_dev_up(struct nfc_dev *nfc_dev)
573{
574 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
575
576 digital_switch_rf(ddev, 1);
577
578 return 0;
579}
580
581static int digital_dev_down(struct nfc_dev *nfc_dev)
582{
583 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
584
585 digital_switch_rf(ddev, 0);
586
587 return 0;
588}
589
590static int digital_dep_link_up(struct nfc_dev *nfc_dev,
591 struct nfc_target *target,
592 __u8 comm_mode, __u8 *gb, size_t gb_len)
593{
594 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
595 int rc;
596
597 rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len);
598
599 if (!rc)
600 ddev->curr_protocol = NFC_PROTO_NFC_DEP;
601
602 return rc;
603}
604
605static int digital_dep_link_down(struct nfc_dev *nfc_dev)
606{
607 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
608
609 digital_abort_cmd(ddev);
610
611 ddev->curr_protocol = 0;
612
613 return 0;
614}
615
616static int digital_activate_target(struct nfc_dev *nfc_dev,
617 struct nfc_target *target, __u32 protocol)
618{
619 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
620
621 if (ddev->poll_tech_count) {
622 pr_err("Can't activate a target while polling\n");
623 return -EBUSY;
624 }
625
626 if (ddev->curr_protocol) {
627 pr_err("A target is already active\n");
628 return -EBUSY;
629 }
630
631 ddev->curr_protocol = protocol;
632
633 return 0;
634}
635
636static void digital_deactivate_target(struct nfc_dev *nfc_dev,
637 struct nfc_target *target,
638 u8 mode)
639{
640 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
641
642 if (!ddev->curr_protocol) {
643 pr_err("No active target\n");
644 return;
645 }
646
647 digital_abort_cmd(ddev);
648 ddev->curr_protocol = 0;
649}
650
651static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb)
652{
653 struct nfc_digital_dev *ddev = nfc_get_drvdata(dev);
654
655 return digital_tg_send_dep_res(ddev, skb);
656}
657
658static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg,
659 struct sk_buff *resp)
660{
661 struct digital_data_exch *data_exch = arg;
662 int rc;
663
664 if (IS_ERR(resp)) {
665 rc = PTR_ERR(resp);
666 resp = NULL;
667 goto done;
668 }
669
670 if (ddev->curr_protocol == NFC_PROTO_MIFARE) {
671 rc = digital_in_recv_mifare_res(resp);
672
673 goto done;
674 }
675
676 if ((ddev->curr_protocol == NFC_PROTO_ISO14443) ||
677 (ddev->curr_protocol == NFC_PROTO_ISO14443_B)) {
678 rc = digital_in_iso_dep_pull_sod(ddev, resp);
679 if (rc)
680 goto done;
681 }
682
683 rc = ddev->skb_check_crc(resp);
684
685done:
686 if (rc) {
687 kfree_skb(resp);
688 resp = NULL;
689 }
690
691 data_exch->cb(data_exch->cb_context, resp, rc);
692
693 kfree(data_exch);
694}
695
696static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target,
697 struct sk_buff *skb, data_exchange_cb_t cb,
698 void *cb_context)
699{
700 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
701 struct digital_data_exch *data_exch;
702 int rc;
703
704 data_exch = kzalloc(sizeof(*data_exch), GFP_KERNEL);
705 if (!data_exch)
706 return -ENOMEM;
707
708 data_exch->cb = cb;
709 data_exch->cb_context = cb_context;
710
711 if (ddev->curr_protocol == NFC_PROTO_NFC_DEP) {
712 rc = digital_in_send_dep_req(ddev, target, skb, data_exch);
713 goto exit;
714 }
715
716 if ((ddev->curr_protocol == NFC_PROTO_ISO14443) ||
717 (ddev->curr_protocol == NFC_PROTO_ISO14443_B)) {
718 rc = digital_in_iso_dep_push_sod(ddev, skb);
719 if (rc)
720 goto exit;
721 }
722
723 ddev->skb_add_crc(skb);
724
725 rc = digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete,
726 data_exch);
727
728exit:
729 if (rc)
730 kfree(data_exch);
731
732 return rc;
733}
734
735static struct nfc_ops digital_nfc_ops = {
736 .dev_up = digital_dev_up,
737 .dev_down = digital_dev_down,
738 .start_poll = digital_start_poll,
739 .stop_poll = digital_stop_poll,
740 .dep_link_up = digital_dep_link_up,
741 .dep_link_down = digital_dep_link_down,
742 .activate_target = digital_activate_target,
743 .deactivate_target = digital_deactivate_target,
744 .tm_send = digital_tg_send,
745 .im_transceive = digital_in_send,
746};
747
748struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops,
749 __u32 supported_protocols,
750 __u32 driver_capabilities,
751 int tx_headroom, int tx_tailroom)
752{
753 struct nfc_digital_dev *ddev;
754
755 if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen ||
756 !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd ||
757 !ops->switch_rf || (ops->tg_listen_md && !ops->tg_get_rf_tech))
758 return NULL;
759
760 ddev = kzalloc(sizeof(*ddev), GFP_KERNEL);
761 if (!ddev)
762 return NULL;
763
764 ddev->driver_capabilities = driver_capabilities;
765 ddev->ops = ops;
766
767 mutex_init(&ddev->cmd_lock);
768 INIT_LIST_HEAD(&ddev->cmd_queue);
769
770 INIT_WORK(&ddev->cmd_work, digital_wq_cmd);
771 INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete);
772
773 mutex_init(&ddev->poll_lock);
774 INIT_DELAYED_WORK(&ddev->poll_work, digital_wq_poll);
775
776 if (supported_protocols & NFC_PROTO_JEWEL_MASK)
777 ddev->protocols |= NFC_PROTO_JEWEL_MASK;
778 if (supported_protocols & NFC_PROTO_MIFARE_MASK)
779 ddev->protocols |= NFC_PROTO_MIFARE_MASK;
780 if (supported_protocols & NFC_PROTO_FELICA_MASK)
781 ddev->protocols |= NFC_PROTO_FELICA_MASK;
782 if (supported_protocols & NFC_PROTO_NFC_DEP_MASK)
783 ddev->protocols |= NFC_PROTO_NFC_DEP_MASK;
784 if (supported_protocols & NFC_PROTO_ISO15693_MASK)
785 ddev->protocols |= NFC_PROTO_ISO15693_MASK;
786 if (supported_protocols & NFC_PROTO_ISO14443_MASK)
787 ddev->protocols |= NFC_PROTO_ISO14443_MASK;
788 if (supported_protocols & NFC_PROTO_ISO14443_B_MASK)
789 ddev->protocols |= NFC_PROTO_ISO14443_B_MASK;
790
791 ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN;
792 ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN;
793
794 ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols,
795 ddev->tx_headroom,
796 ddev->tx_tailroom);
797 if (!ddev->nfc_dev) {
798 pr_err("nfc_allocate_device failed\n");
799 goto free_dev;
800 }
801
802 nfc_set_drvdata(ddev->nfc_dev, ddev);
803
804 return ddev;
805
806free_dev:
807 kfree(ddev);
808
809 return NULL;
810}
811EXPORT_SYMBOL(nfc_digital_allocate_device);
812
813void nfc_digital_free_device(struct nfc_digital_dev *ddev)
814{
815 nfc_free_device(ddev->nfc_dev);
816 kfree(ddev);
817}
818EXPORT_SYMBOL(nfc_digital_free_device);
819
820int nfc_digital_register_device(struct nfc_digital_dev *ddev)
821{
822 return nfc_register_device(ddev->nfc_dev);
823}
824EXPORT_SYMBOL(nfc_digital_register_device);
825
826void nfc_digital_unregister_device(struct nfc_digital_dev *ddev)
827{
828 struct digital_cmd *cmd, *n;
829
830 nfc_unregister_device(ddev->nfc_dev);
831
832 mutex_lock(&ddev->poll_lock);
833 ddev->poll_tech_count = 0;
834 mutex_unlock(&ddev->poll_lock);
835
836 cancel_delayed_work_sync(&ddev->poll_work);
837 cancel_work_sync(&ddev->cmd_work);
838 cancel_work_sync(&ddev->cmd_complete_work);
839
840 list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) {
841 list_del(&cmd->queue);
842
843
844
845
846
847 if (cmd->cmd_cb)
848 cmd->cmd_cb(ddev, cmd->cb_context, ERR_PTR(-ENODEV));
849
850 kfree(cmd->mdaa_params);
851 kfree(cmd);
852 }
853}
854EXPORT_SYMBOL(nfc_digital_unregister_device);
855
856MODULE_LICENSE("GPL");
857
