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NFC: digital: Add missing break in switch statement
[mirror_ubuntu-zesty-kernel.git] / net / nfc / digital_core.c
CommitLineData
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
a381d482
MG		 28#define DIGITAL_PROTO_ISO15693_RF_TECH NFC_PROTO_ISO15693_MASK
29
59ee2361
TE		 30struct digital_cmd {
31 struct list_head queue;
32
33 u8 type;
34 u8 pending;
35
36 u16 timeout;
37 struct sk_buff *req;
38 struct sk_buff *resp;
1c7a4c24 39 struct digital_tg_mdaa_params *mdaa_params;
59ee2361
TE		 40
41 nfc_digital_cmd_complete_t cmd_cb;
42 void *cb_context;
43};
44
45struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev,
46 unsigned int len)
47{
48 struct sk_buff *skb;
49
50 skb = alloc_skb(len + ddev->tx_headroom + ddev->tx_tailroom,
51 GFP_KERNEL);
52 if (skb)
53 skb_reserve(skb, ddev->tx_headroom);
54
55 return skb;
56}
57
2c66daec
TE		 58void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
59 u8 bitwise_inv, u8 msb_first)
60{
61 u16 crc;
62
63 crc = crc_func(init, skb->data, skb->len);
64
65 if (bitwise_inv)
66 crc = ~crc;
67
68 if (msb_first)
69 crc = __fswab16(crc);
70
71 *skb_put(skb, 1) = crc & 0xFF;
72 *skb_put(skb, 1) = (crc >> 8) & 0xFF;
73}
74
75int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
76 u16 crc_init, u8 bitwise_inv, u8 msb_first)
77{
78 int rc;
79 u16 crc;
80
81 if (skb->len <= 2)
82 return -EIO;
83
84 crc = crc_func(crc_init, skb->data, skb->len - 2);
85
86 if (bitwise_inv)
87 crc = ~crc;
88
89 if (msb_first)
90 crc = __swab16(crc);
91
92 rc = (skb->data[skb->len - 2] - (crc & 0xFF)) +
93 (skb->data[skb->len - 1] - ((crc >> 8) & 0xFF));
94
95 if (rc)
96 return -EIO;
97
98 skb_trim(skb, skb->len - 2);
99
100 return 0;
101}
102
59ee2361
TE		 103static inline void digital_switch_rf(struct nfc_digital_dev *ddev, bool on)
104{
105 ddev->ops->switch_rf(ddev, on);
106}
107
108static inline void digital_abort_cmd(struct nfc_digital_dev *ddev)
109{
110 ddev->ops->abort_cmd(ddev);
111}
112
113static void digital_wq_cmd_complete(struct work_struct *work)
114{
115 struct digital_cmd *cmd;
116 struct nfc_digital_dev *ddev = container_of(work,
117 struct nfc_digital_dev,
118 cmd_complete_work);
119
120 mutex_lock(&ddev->cmd_lock);
121
122 cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd,
123 queue);
124 if (!cmd) {
125 mutex_unlock(&ddev->cmd_lock);
126 return;
127 }
128
129 list_del(&cmd->queue);
130
131 mutex_unlock(&ddev->cmd_lock);
132
133 if (!IS_ERR(cmd->resp))
134 print_hex_dump_debug("DIGITAL RX: ", DUMP_PREFIX_NONE, 16, 1,
135 cmd->resp->data, cmd->resp->len, false);
136
137 cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp);
138
1c7a4c24 139 kfree(cmd->mdaa_params);
59ee2361
TE		 140 kfree(cmd);
141
142 schedule_work(&ddev->cmd_work);
143}
144
145static void digital_send_cmd_complete(struct nfc_digital_dev *ddev,
146 void *arg, struct sk_buff *resp)
147{
148 struct digital_cmd *cmd = arg;
149
150 cmd->resp = resp;
151
152 schedule_work(&ddev->cmd_complete_work);
153}
154
155static void digital_wq_cmd(struct work_struct *work)
156{
157 int rc;
158 struct digital_cmd *cmd;
1c7a4c24 159 struct digital_tg_mdaa_params *params;
59ee2361
TE		 160 struct nfc_digital_dev *ddev = container_of(work,
161 struct nfc_digital_dev,
162 cmd_work);
163
164 mutex_lock(&ddev->cmd_lock);
165
166 cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd,
167 queue);
168 if (!cmd || cmd->pending) {
169 mutex_unlock(&ddev->cmd_lock);
170 return;
171 }
172
173 mutex_unlock(&ddev->cmd_lock);
174
175 if (cmd->req)
176 print_hex_dump_debug("DIGITAL TX: ", DUMP_PREFIX_NONE, 16, 1,
177 cmd->req->data, cmd->req->len, false);
178
179 switch (cmd->type) {
180 case DIGITAL_CMD_IN_SEND:
181 rc = ddev->ops->in_send_cmd(ddev, cmd->req, cmd->timeout,
182 digital_send_cmd_complete, cmd);
183 break;
1c7a4c24
TE		 184
185 case DIGITAL_CMD_TG_SEND:
186 rc = ddev->ops->tg_send_cmd(ddev, cmd->req, cmd->timeout,
187 digital_send_cmd_complete, cmd);
188 break;
189
190 case DIGITAL_CMD_TG_LISTEN:
191 rc = ddev->ops->tg_listen(ddev, cmd->timeout,
192 digital_send_cmd_complete, cmd);
193 break;
194
195 case DIGITAL_CMD_TG_LISTEN_MDAA:
196 params = cmd->mdaa_params;
197
198 rc = ddev->ops->tg_listen_mdaa(ddev, params, cmd->timeout,
199 digital_send_cmd_complete, cmd);
200 break;
201
59ee2361 202 default:
26042530 203 pr_err("Unknown cmd type %d\n", cmd->type);
59ee2361
TE		 204 return;
205 }
206
207 if (!rc)
208 return;
209
26042530 210 pr_err("in_send_command returned err %d\n", rc);
59ee2361
TE		 211
212 mutex_lock(&ddev->cmd_lock);
213 list_del(&cmd->queue);
214 mutex_unlock(&ddev->cmd_lock);
215
216 kfree_skb(cmd->req);
1c7a4c24 217 kfree(cmd->mdaa_params);
59ee2361
TE		 218 kfree(cmd);
219
220 schedule_work(&ddev->cmd_work);
221}
222
223int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
1c7a4c24
TE		 224 struct sk_buff *skb, struct digital_tg_mdaa_params *params,
225 u16 timeout, nfc_digital_cmd_complete_t cmd_cb,
226 void *cb_context)
59ee2361
TE		 227{
228 struct digital_cmd *cmd;
229
230 cmd = kzalloc(sizeof(struct digital_cmd), GFP_KERNEL);
231 if (!cmd)
232 return -ENOMEM;
233
234 cmd->type = cmd_type;
235 cmd->timeout = timeout;
236 cmd->req = skb;
1c7a4c24 237 cmd->mdaa_params = params;
59ee2361
TE		 238 cmd->cmd_cb = cmd_cb;
239 cmd->cb_context = cb_context;
240 INIT_LIST_HEAD(&cmd->queue);
241
242 mutex_lock(&ddev->cmd_lock);
243 list_add_tail(&cmd->queue, &ddev->cmd_queue);
244 mutex_unlock(&ddev->cmd_lock);
245
246 schedule_work(&ddev->cmd_work);
247
248 return 0;
249}
250
251int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
252{
253 int rc;
254
255 rc = ddev->ops->in_configure_hw(ddev, type, param);
256 if (rc)
26042530 257 pr_err("in_configure_hw failed: %d\n", rc);
59ee2361
TE		 258
259 return rc;
260}
261
1c7a4c24
TE		 262int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
263{
264 int rc;
265
266 rc = ddev->ops->tg_configure_hw(ddev, type, param);
267 if (rc)
26042530 268 pr_err("tg_configure_hw failed: %d\n", rc);
1c7a4c24
TE		 269
270 return rc;
271}
272
273static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech)
274{
275 struct digital_tg_mdaa_params *params;
276
277 params = kzalloc(sizeof(struct digital_tg_mdaa_params), GFP_KERNEL);
278 if (!params)
279 return -ENOMEM;
280
281 params->sens_res = DIGITAL_SENS_RES_NFC_DEP;
282 get_random_bytes(params->nfcid1, sizeof(params->nfcid1));
283 params->sel_res = DIGITAL_SEL_RES_NFC_DEP;
284
285 params->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
286 params->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
287 get_random_bytes(params->nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2);
288 params->sc = DIGITAL_SENSF_FELICA_SC;
289
290 return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MDAA, NULL, params,
291 500, digital_tg_recv_atr_req, NULL);
292}
293
2c66daec
TE		 294int digital_target_found(struct nfc_digital_dev *ddev,
295 struct nfc_target *target, u8 protocol)
296{
297 int rc;
298 u8 framing;
299 u8 rf_tech;
300 int (*check_crc)(struct sk_buff *skb);
301 void (*add_crc)(struct sk_buff *skb);
302
303 rf_tech = ddev->poll_techs[ddev->poll_tech_index].rf_tech;
304
305 switch (protocol) {
306 case NFC_PROTO_JEWEL:
307 framing = NFC_DIGITAL_FRAMING_NFCA_T1T;
308 check_crc = digital_skb_check_crc_b;
309 add_crc = digital_skb_add_crc_b;
310 break;
311
312 case NFC_PROTO_MIFARE:
313 framing = NFC_DIGITAL_FRAMING_NFCA_T2T;
314 check_crc = digital_skb_check_crc_a;
315 add_crc = digital_skb_add_crc_a;
316 break;
317
8c0695e4
TE		 318 case NFC_PROTO_FELICA:
319 framing = NFC_DIGITAL_FRAMING_NFCF_T3T;
320 check_crc = digital_skb_check_crc_f;
321 add_crc = digital_skb_add_crc_f;
322 break;
323
7d0911c0
TE		 324 case NFC_PROTO_NFC_DEP:
325 if (rf_tech == NFC_DIGITAL_RF_TECH_106A) {
326 framing = NFC_DIGITAL_FRAMING_NFCA_NFC_DEP;
327 check_crc = digital_skb_check_crc_a;
328 add_crc = digital_skb_add_crc_a;
329 } else {
330 framing = NFC_DIGITAL_FRAMING_NFCF_NFC_DEP;
331 check_crc = digital_skb_check_crc_f;
332 add_crc = digital_skb_add_crc_f;
333 }
334 break;
335
a381d482
MG		 336 case NFC_PROTO_ISO15693:
337 framing = NFC_DIGITAL_FRAMING_ISO15693_TVT;
338 check_crc = digital_skb_check_crc_b;
339 add_crc = digital_skb_add_crc_b;
564af14e 340 break;
12e3d241
TE		 341
342 case NFC_PROTO_ISO14443:
343 framing = NFC_DIGITAL_FRAMING_NFCA_T4T;
344 check_crc = digital_skb_check_crc_a;
345 add_crc = digital_skb_add_crc_a;
a381d482
MG		 346 break;
347
2c66daec 348 default:
26042530 349 pr_err("Invalid protocol %d\n", protocol);
2c66daec
TE		 350 return -EINVAL;
351 }
352
26042530 353 pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol);
2c66daec
TE		 354
355 ddev->curr_rf_tech = rf_tech;
2c66daec
TE		 356
357 if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
358 ddev->skb_add_crc = digital_skb_add_crc_none;
359 ddev->skb_check_crc = digital_skb_check_crc_none;
360 } else {
361 ddev->skb_add_crc = add_crc;
362 ddev->skb_check_crc = check_crc;
363 }
364
365 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing);
366 if (rc)
367 return rc;
368
369 target->supported_protocols = (1 << protocol);
370 rc = nfc_targets_found(ddev->nfc_dev, target, 1);
371 if (rc)
372 return rc;
373
374 ddev->poll_tech_count = 0;
375
376 return 0;
377}
378
59ee2361
TE		 379void digital_poll_next_tech(struct nfc_digital_dev *ddev)
380{
381 digital_switch_rf(ddev, 0);
382
383 mutex_lock(&ddev->poll_lock);
384
385 if (!ddev->poll_tech_count) {
386 mutex_unlock(&ddev->poll_lock);
387 return;
388 }
389
390 ddev->poll_tech_index = (ddev->poll_tech_index + 1) %
391 ddev->poll_tech_count;
392
393 mutex_unlock(&ddev->poll_lock);
394
395 schedule_work(&ddev->poll_work);
396}
397
398static void digital_wq_poll(struct work_struct *work)
399{
400 int rc;
401 struct digital_poll_tech *poll_tech;
402 struct nfc_digital_dev *ddev = container_of(work,
403 struct nfc_digital_dev,
404 poll_work);
405 mutex_lock(&ddev->poll_lock);
406
407 if (!ddev->poll_tech_count) {
408 mutex_unlock(&ddev->poll_lock);
409 return;
410 }
411
412 poll_tech = &ddev->poll_techs[ddev->poll_tech_index];
413
414 mutex_unlock(&ddev->poll_lock);
415
416 rc = poll_tech->poll_func(ddev, poll_tech->rf_tech);
417 if (rc)
418 digital_poll_next_tech(ddev);
419}
420
421static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech,
422 digital_poll_t poll_func)
423{
424 struct digital_poll_tech *poll_tech;
425
426 if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX)
427 return;
428
429 poll_tech = &ddev->poll_techs[ddev->poll_tech_count++];
430
431 poll_tech->rf_tech = rf_tech;
432 poll_tech->poll_func = poll_func;
433}
434
435/**
436 * start_poll operation
437 *
438 * For every supported protocol, the corresponding polling function is added
439 * to the table of polling technologies (ddev->poll_techs[]) using
440 * digital_add_poll_tech().
441 * When a polling function fails (by timeout or protocol error) the next one is
442 * schedule by digital_poll_next_tech() on the poll workqueue (ddev->poll_work).
443 */
4b10884e
TE		 444static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols,
445 __u32 tm_protocols)
446{
59ee2361
TE		 447 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
448 u32 matching_im_protocols, matching_tm_protocols;
449
26042530 450 pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols,
c5da0e4a 451 tm_protocols, ddev->protocols);
59ee2361
TE		 452
453 matching_im_protocols = ddev->protocols & im_protocols;
454 matching_tm_protocols = ddev->protocols & tm_protocols;
455
456 if (!matching_im_protocols && !matching_tm_protocols) {
26042530 457 pr_err("Unknown protocol\n");
59ee2361
TE		 458 return -EINVAL;
459 }
460
461 if (ddev->poll_tech_count) {
26042530 462 pr_err("Already polling\n");
59ee2361
TE		 463 return -EBUSY;
464 }
465
466 if (ddev->curr_protocol) {
26042530 467 pr_err("A target is already active\n");
59ee2361
TE		 468 return -EBUSY;
469 }
470
471 ddev->poll_tech_count = 0;
472 ddev->poll_tech_index = 0;
473
474 if (matching_im_protocols & DIGITAL_PROTO_NFCA_RF_TECH)
475 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
476 digital_in_send_sens_req);
477
8c0695e4
TE		 478 if (im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) {
479 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
480 digital_in_send_sensf_req);
481
482 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F,
483 digital_in_send_sensf_req);
484 }
485
a381d482
MG		 486 if (matching_im_protocols & DIGITAL_PROTO_ISO15693_RF_TECH)
487 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_ISO15693,
488 digital_in_send_iso15693_inv_req);
489
1c7a4c24
TE		 490 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
491 if (ddev->ops->tg_listen_mdaa) {
492 digital_add_poll_tech(ddev, 0,
493 digital_tg_listen_mdaa);
494 } else {
495 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
496 digital_tg_listen_nfca);
497
498 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
499 digital_tg_listen_nfcf);
500
501 digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F,
502 digital_tg_listen_nfcf);
503 }
504 }
505
59ee2361 506 if (!ddev->poll_tech_count) {
26042530 507 pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n",
59ee2361
TE		 508 matching_im_protocols, matching_tm_protocols);
509 return -EINVAL;
510 }
511
512 schedule_work(&ddev->poll_work);
513
514 return 0;
4b10884e
TE		 515}
516
517static void digital_stop_poll(struct nfc_dev *nfc_dev)
518{
59ee2361
TE		 519 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
520
521 mutex_lock(&ddev->poll_lock);
522
523 if (!ddev->poll_tech_count) {
26042530 524 pr_err("Polling operation was not running\n");
59ee2361
TE		 525 mutex_unlock(&ddev->poll_lock);
526 return;
527 }
528
529 ddev->poll_tech_count = 0;
530
531 mutex_unlock(&ddev->poll_lock);
532
533 cancel_work_sync(&ddev->poll_work);
534
535 digital_abort_cmd(ddev);
4b10884e
TE		 536}
537
538static int digital_dev_up(struct nfc_dev *nfc_dev)
539{
59ee2361
TE		 540 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
541
542 digital_switch_rf(ddev, 1);
543
544 return 0;
4b10884e
TE		 545}
546
547static int digital_dev_down(struct nfc_dev *nfc_dev)
548{
59ee2361
TE		 549 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
550
551 digital_switch_rf(ddev, 0);
552
553 return 0;
4b10884e
TE		 554}
555
556static int digital_dep_link_up(struct nfc_dev *nfc_dev,
557 struct nfc_target *target,
558 __u8 comm_mode, __u8 *gb, size_t gb_len)
559{
7d0911c0 560 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
48e10445
TE		 561 int rc;
562
563 rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len);
7d0911c0 564
48e10445
TE		 565 if (!rc)
566 ddev->curr_protocol = NFC_PROTO_NFC_DEP;
567
568 return rc;
4b10884e
TE		 569}
570
571static int digital_dep_link_down(struct nfc_dev *nfc_dev)
572{
7d0911c0
TE		 573 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
574
575 ddev->curr_protocol = 0;
576
577 return 0;
4b10884e
TE		 578}
579
580static int digital_activate_target(struct nfc_dev *nfc_dev,
581 struct nfc_target *target, __u32 protocol)
582{
48e10445
TE		 583 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
584
585 if (ddev->poll_tech_count) {
586 pr_err("Can't activate a target while polling\n");
587 return -EBUSY;
588 }
589
590 if (ddev->curr_protocol) {
591 pr_err("A target is already active\n");
592 return -EBUSY;
593 }
594
595 ddev->curr_protocol = protocol;
596
59ee2361 597 return 0;
4b10884e
TE		 598}
599
600static void digital_deactivate_target(struct nfc_dev *nfc_dev,
601 struct nfc_target *target)
602{
59ee2361
TE		 603 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
604
48e10445
TE		 605 if (!ddev->curr_protocol) {
606 pr_err("No active target\n");
607 return;
608 }
609
59ee2361 610 ddev->curr_protocol = 0;
4b10884e
TE		 611}
612
613static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb)
614{
1c7a4c24
TE		 615 struct nfc_digital_dev *ddev = nfc_get_drvdata(dev);
616
617 return digital_tg_send_dep_res(ddev, skb);
4b10884e
TE		 618}
619
2c66daec
TE		 620static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg,
621 struct sk_buff *resp)
622{
623 struct digital_data_exch *data_exch = arg;
624 int rc;
625
626 if (IS_ERR(resp)) {
627 rc = PTR_ERR(resp);
c813007f 628 resp = NULL;
2c66daec
TE		 629 goto done;
630 }
631
c813007f 632 if (ddev->curr_protocol == NFC_PROTO_MIFARE) {
2c66daec 633 rc = digital_in_recv_mifare_res(resp);
c813007f
TE		 634 /* crc check is done in digital_in_recv_mifare_res() */
635 goto done;
636 }
637
638 if (ddev->curr_protocol == NFC_PROTO_ISO14443) {
639 rc = digital_in_iso_dep_pull_sod(ddev, resp);
640 if (rc)
641 goto done;
642 }
643
644 rc = ddev->skb_check_crc(resp);
2c66daec 645
c813007f 646done:
2c66daec
TE		 647 if (rc) {
648 kfree_skb(resp);
649 resp = NULL;
650 }
651
2c66daec
TE		 652 data_exch->cb(data_exch->cb_context, resp, rc);
653
654 kfree(data_exch);
655}
656
4b10884e
TE		 657static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target,
658 struct sk_buff *skb, data_exchange_cb_t cb,
659 void *cb_context)
660{
2c66daec
TE		 661 struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
662 struct digital_data_exch *data_exch;
c813007f 663 int rc;
2c66daec
TE		 664
665 data_exch = kzalloc(sizeof(struct digital_data_exch), GFP_KERNEL);
666 if (!data_exch) {
26042530 667 pr_err("Failed to allocate data_exch struct\n");
2c66daec
TE		 668 return -ENOMEM;
669 }
670
671 data_exch->cb = cb;
672 data_exch->cb_context = cb_context;
673
7d0911c0
TE		 674 if (ddev->curr_protocol == NFC_PROTO_NFC_DEP)
675 return digital_in_send_dep_req(ddev, target, skb, data_exch);
676
c813007f
TE		 677 if (ddev->curr_protocol == NFC_PROTO_ISO14443) {
678 rc = digital_in_iso_dep_push_sod(ddev, skb);
679 if (rc)
680 return rc;
681 }
682
2c66daec
TE		 683 ddev->skb_add_crc(skb);
684
685 return digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete,
686 data_exch);
4b10884e
TE		 687}
688
689static struct nfc_ops digital_nfc_ops = {
690 .dev_up = digital_dev_up,
691 .dev_down = digital_dev_down,
692 .start_poll = digital_start_poll,
693 .stop_poll = digital_stop_poll,
694 .dep_link_up = digital_dep_link_up,
695 .dep_link_down = digital_dep_link_down,
696 .activate_target = digital_activate_target,
697 .deactivate_target = digital_deactivate_target,
698 .tm_send = digital_tg_send,
699 .im_transceive = digital_in_send,
700};
701
702struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops,
703 __u32 supported_protocols,
704 __u32 driver_capabilities,
705 int tx_headroom, int tx_tailroom)
706{
707 struct nfc_digital_dev *ddev;
708
709 if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen ||
710 !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd ||
711 !ops->switch_rf)
712 return NULL;
713
714 ddev = kzalloc(sizeof(struct nfc_digital_dev), GFP_KERNEL);
26042530 715 if (!ddev)
4b10884e 716 return NULL;
4b10884e
TE		 717
718 ddev->driver_capabilities = driver_capabilities;
719 ddev->ops = ops;
720
59ee2361
TE		 721 mutex_init(&ddev->cmd_lock);
722 INIT_LIST_HEAD(&ddev->cmd_queue);
723
724 INIT_WORK(&ddev->cmd_work, digital_wq_cmd);
725 INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete);
726
727 mutex_init(&ddev->poll_lock);
728 INIT_WORK(&ddev->poll_work, digital_wq_poll);
729
730 if (supported_protocols & NFC_PROTO_JEWEL_MASK)
731 ddev->protocols |= NFC_PROTO_JEWEL_MASK;
732 if (supported_protocols & NFC_PROTO_MIFARE_MASK)
733 ddev->protocols |= NFC_PROTO_MIFARE_MASK;
8c0695e4
TE		 734 if (supported_protocols & NFC_PROTO_FELICA_MASK)
735 ddev->protocols |= NFC_PROTO_FELICA_MASK;
7d0911c0
TE		 736 if (supported_protocols & NFC_PROTO_NFC_DEP_MASK)
737 ddev->protocols |= NFC_PROTO_NFC_DEP_MASK;
a381d482
MG		 738 if (supported_protocols & NFC_PROTO_ISO15693_MASK)
739 ddev->protocols |= NFC_PROTO_ISO15693_MASK;
12e3d241
TE		 740 if (supported_protocols & NFC_PROTO_ISO14443_MASK)
741 ddev->protocols |= NFC_PROTO_ISO14443_MASK;
59ee2361
TE		 742
743 ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN;
744 ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN;
4b10884e
TE		 745
746 ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols,
747 ddev->tx_headroom,
748 ddev->tx_tailroom);
749 if (!ddev->nfc_dev) {
26042530 750 pr_err("nfc_allocate_device failed\n");
4b10884e
TE		 751 goto free_dev;
752 }
753
754 nfc_set_drvdata(ddev->nfc_dev, ddev);
755
756 return ddev;
757
758free_dev:
759 kfree(ddev);
760
761 return NULL;
762}
763EXPORT_SYMBOL(nfc_digital_allocate_device);
764
765void nfc_digital_free_device(struct nfc_digital_dev *ddev)
766{
767 nfc_free_device(ddev->nfc_dev);
4b10884e
TE		 768 kfree(ddev);
769}
770EXPORT_SYMBOL(nfc_digital_free_device);
771
772int nfc_digital_register_device(struct nfc_digital_dev *ddev)
773{
774 return nfc_register_device(ddev->nfc_dev);
775}
776EXPORT_SYMBOL(nfc_digital_register_device);
777
778void nfc_digital_unregister_device(struct nfc_digital_dev *ddev)
779{
59ee2361
TE		 780 struct digital_cmd *cmd, *n;
781
4b10884e 782 nfc_unregister_device(ddev->nfc_dev);
59ee2361
TE		 783
784 mutex_lock(&ddev->poll_lock);
785 ddev->poll_tech_count = 0;
786 mutex_unlock(&ddev->poll_lock);
787
788 cancel_work_sync(&ddev->poll_work);
789 cancel_work_sync(&ddev->cmd_work);
790 cancel_work_sync(&ddev->cmd_complete_work);
791
792 list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) {
793 list_del(&cmd->queue);
1c7a4c24 794 kfree(cmd->mdaa_params);
59ee2361
TE		 795 kfree(cmd);
796 }
4b10884e
TE		 797}
798EXPORT_SYMBOL(nfc_digital_unregister_device);
799
800MODULE_LICENSE("GPL");
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