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 \ |
ce2e56cd SS |
23 | (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | \ |
24 | NFC_PROTO_NFC_DEP_MASK | NFC_PROTO_ISO14443_MASK) | |
59ee2361 | 25 | |
24734607 MG |
26 | #define DIGITAL_PROTO_NFCB_RF_TECH NFC_PROTO_ISO14443_B_MASK |
27 | ||
7d0911c0 TE |
28 | #define DIGITAL_PROTO_NFCF_RF_TECH \ |
29 | (NFC_PROTO_FELICA_MASK | NFC_PROTO_NFC_DEP_MASK) | |
8c0695e4 | 30 | |
a381d482 MG |
31 | #define DIGITAL_PROTO_ISO15693_RF_TECH NFC_PROTO_ISO15693_MASK |
32 | ||
59ee2361 TE |
33 | struct digital_cmd { |
34 | struct list_head queue; | |
35 | ||
36 | u8 type; | |
37 | u8 pending; | |
38 | ||
39 | u16 timeout; | |
40 | struct sk_buff *req; | |
41 | struct sk_buff *resp; | |
1c7a4c24 | 42 | struct digital_tg_mdaa_params *mdaa_params; |
59ee2361 TE |
43 | |
44 | nfc_digital_cmd_complete_t cmd_cb; | |
45 | void *cb_context; | |
46 | }; | |
47 | ||
48 | struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, | |
49 | unsigned int len) | |
50 | { | |
51 | struct sk_buff *skb; | |
52 | ||
53 | skb = alloc_skb(len + ddev->tx_headroom + ddev->tx_tailroom, | |
54 | GFP_KERNEL); | |
55 | if (skb) | |
56 | skb_reserve(skb, ddev->tx_headroom); | |
57 | ||
58 | return skb; | |
59 | } | |
60 | ||
2c66daec TE |
61 | void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init, |
62 | u8 bitwise_inv, u8 msb_first) | |
63 | { | |
64 | u16 crc; | |
65 | ||
66 | crc = crc_func(init, skb->data, skb->len); | |
67 | ||
68 | if (bitwise_inv) | |
69 | crc = ~crc; | |
70 | ||
71 | if (msb_first) | |
72 | crc = __fswab16(crc); | |
73 | ||
74 | *skb_put(skb, 1) = crc & 0xFF; | |
75 | *skb_put(skb, 1) = (crc >> 8) & 0xFF; | |
76 | } | |
77 | ||
78 | int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func, | |
79 | u16 crc_init, u8 bitwise_inv, u8 msb_first) | |
80 | { | |
81 | int rc; | |
82 | u16 crc; | |
83 | ||
84 | if (skb->len <= 2) | |
85 | return -EIO; | |
86 | ||
87 | crc = crc_func(crc_init, skb->data, skb->len - 2); | |
88 | ||
89 | if (bitwise_inv) | |
90 | crc = ~crc; | |
91 | ||
92 | if (msb_first) | |
93 | crc = __swab16(crc); | |
94 | ||
95 | rc = (skb->data[skb->len - 2] - (crc & 0xFF)) + | |
96 | (skb->data[skb->len - 1] - ((crc >> 8) & 0xFF)); | |
97 | ||
98 | if (rc) | |
99 | return -EIO; | |
100 | ||
101 | skb_trim(skb, skb->len - 2); | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
59ee2361 TE |
106 | static inline void digital_switch_rf(struct nfc_digital_dev *ddev, bool on) |
107 | { | |
108 | ddev->ops->switch_rf(ddev, on); | |
109 | } | |
110 | ||
111 | static inline void digital_abort_cmd(struct nfc_digital_dev *ddev) | |
112 | { | |
113 | ddev->ops->abort_cmd(ddev); | |
114 | } | |
115 | ||
116 | static void digital_wq_cmd_complete(struct work_struct *work) | |
117 | { | |
118 | struct digital_cmd *cmd; | |
119 | struct nfc_digital_dev *ddev = container_of(work, | |
120 | struct nfc_digital_dev, | |
121 | cmd_complete_work); | |
122 | ||
123 | mutex_lock(&ddev->cmd_lock); | |
124 | ||
125 | cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd, | |
126 | queue); | |
127 | if (!cmd) { | |
128 | mutex_unlock(&ddev->cmd_lock); | |
129 | return; | |
130 | } | |
131 | ||
132 | list_del(&cmd->queue); | |
133 | ||
134 | mutex_unlock(&ddev->cmd_lock); | |
135 | ||
136 | if (!IS_ERR(cmd->resp)) | |
137 | print_hex_dump_debug("DIGITAL RX: ", DUMP_PREFIX_NONE, 16, 1, | |
138 | cmd->resp->data, cmd->resp->len, false); | |
139 | ||
140 | cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp); | |
141 | ||
1c7a4c24 | 142 | kfree(cmd->mdaa_params); |
59ee2361 TE |
143 | kfree(cmd); |
144 | ||
145 | schedule_work(&ddev->cmd_work); | |
146 | } | |
147 | ||
148 | static void digital_send_cmd_complete(struct nfc_digital_dev *ddev, | |
149 | void *arg, struct sk_buff *resp) | |
150 | { | |
151 | struct digital_cmd *cmd = arg; | |
152 | ||
153 | cmd->resp = resp; | |
154 | ||
155 | schedule_work(&ddev->cmd_complete_work); | |
156 | } | |
157 | ||
158 | static void digital_wq_cmd(struct work_struct *work) | |
159 | { | |
160 | int rc; | |
161 | struct digital_cmd *cmd; | |
1c7a4c24 | 162 | struct digital_tg_mdaa_params *params; |
59ee2361 TE |
163 | struct nfc_digital_dev *ddev = container_of(work, |
164 | struct nfc_digital_dev, | |
165 | cmd_work); | |
166 | ||
167 | mutex_lock(&ddev->cmd_lock); | |
168 | ||
169 | cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd, | |
170 | queue); | |
171 | if (!cmd || cmd->pending) { | |
172 | mutex_unlock(&ddev->cmd_lock); | |
173 | return; | |
174 | } | |
175 | ||
176 | mutex_unlock(&ddev->cmd_lock); | |
177 | ||
178 | if (cmd->req) | |
179 | print_hex_dump_debug("DIGITAL TX: ", DUMP_PREFIX_NONE, 16, 1, | |
180 | cmd->req->data, cmd->req->len, false); | |
181 | ||
182 | switch (cmd->type) { | |
183 | case DIGITAL_CMD_IN_SEND: | |
184 | rc = ddev->ops->in_send_cmd(ddev, cmd->req, cmd->timeout, | |
185 | digital_send_cmd_complete, cmd); | |
186 | break; | |
1c7a4c24 TE |
187 | |
188 | case DIGITAL_CMD_TG_SEND: | |
189 | rc = ddev->ops->tg_send_cmd(ddev, cmd->req, cmd->timeout, | |
190 | digital_send_cmd_complete, cmd); | |
191 | break; | |
192 | ||
193 | case DIGITAL_CMD_TG_LISTEN: | |
194 | rc = ddev->ops->tg_listen(ddev, cmd->timeout, | |
195 | digital_send_cmd_complete, cmd); | |
196 | break; | |
197 | ||
198 | case DIGITAL_CMD_TG_LISTEN_MDAA: | |
199 | params = cmd->mdaa_params; | |
200 | ||
201 | rc = ddev->ops->tg_listen_mdaa(ddev, params, cmd->timeout, | |
202 | digital_send_cmd_complete, cmd); | |
203 | break; | |
204 | ||
bf30a67c MG |
205 | case DIGITAL_CMD_TG_LISTEN_MD: |
206 | rc = ddev->ops->tg_listen_md(ddev, cmd->timeout, | |
207 | digital_send_cmd_complete, cmd); | |
208 | break; | |
209 | ||
59ee2361 | 210 | default: |
26042530 | 211 | pr_err("Unknown cmd type %d\n", cmd->type); |
59ee2361 TE |
212 | return; |
213 | } | |
214 | ||
215 | if (!rc) | |
216 | return; | |
217 | ||
26042530 | 218 | pr_err("in_send_command returned err %d\n", rc); |
59ee2361 TE |
219 | |
220 | mutex_lock(&ddev->cmd_lock); | |
221 | list_del(&cmd->queue); | |
222 | mutex_unlock(&ddev->cmd_lock); | |
223 | ||
224 | kfree_skb(cmd->req); | |
1c7a4c24 | 225 | kfree(cmd->mdaa_params); |
59ee2361 TE |
226 | kfree(cmd); |
227 | ||
228 | schedule_work(&ddev->cmd_work); | |
229 | } | |
230 | ||
231 | int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type, | |
1c7a4c24 TE |
232 | struct sk_buff *skb, struct digital_tg_mdaa_params *params, |
233 | u16 timeout, nfc_digital_cmd_complete_t cmd_cb, | |
234 | void *cb_context) | |
59ee2361 TE |
235 | { |
236 | struct digital_cmd *cmd; | |
237 | ||
238 | cmd = kzalloc(sizeof(struct digital_cmd), GFP_KERNEL); | |
239 | if (!cmd) | |
240 | return -ENOMEM; | |
241 | ||
242 | cmd->type = cmd_type; | |
243 | cmd->timeout = timeout; | |
244 | cmd->req = skb; | |
1c7a4c24 | 245 | cmd->mdaa_params = params; |
59ee2361 TE |
246 | cmd->cmd_cb = cmd_cb; |
247 | cmd->cb_context = cb_context; | |
248 | INIT_LIST_HEAD(&cmd->queue); | |
249 | ||
250 | mutex_lock(&ddev->cmd_lock); | |
251 | list_add_tail(&cmd->queue, &ddev->cmd_queue); | |
252 | mutex_unlock(&ddev->cmd_lock); | |
253 | ||
254 | schedule_work(&ddev->cmd_work); | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param) | |
260 | { | |
261 | int rc; | |
262 | ||
263 | rc = ddev->ops->in_configure_hw(ddev, type, param); | |
264 | if (rc) | |
26042530 | 265 | pr_err("in_configure_hw failed: %d\n", rc); |
59ee2361 TE |
266 | |
267 | return rc; | |
268 | } | |
269 | ||
1c7a4c24 TE |
270 | int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param) |
271 | { | |
272 | int rc; | |
273 | ||
274 | rc = ddev->ops->tg_configure_hw(ddev, type, param); | |
275 | if (rc) | |
26042530 | 276 | pr_err("tg_configure_hw failed: %d\n", rc); |
1c7a4c24 TE |
277 | |
278 | return rc; | |
279 | } | |
280 | ||
281 | static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech) | |
282 | { | |
283 | struct digital_tg_mdaa_params *params; | |
284 | ||
285 | params = kzalloc(sizeof(struct digital_tg_mdaa_params), GFP_KERNEL); | |
286 | if (!params) | |
287 | return -ENOMEM; | |
288 | ||
289 | params->sens_res = DIGITAL_SENS_RES_NFC_DEP; | |
290 | get_random_bytes(params->nfcid1, sizeof(params->nfcid1)); | |
291 | params->sel_res = DIGITAL_SEL_RES_NFC_DEP; | |
292 | ||
293 | params->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
294 | params->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
295 | get_random_bytes(params->nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2); | |
296 | params->sc = DIGITAL_SENSF_FELICA_SC; | |
297 | ||
298 | return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MDAA, NULL, params, | |
299 | 500, digital_tg_recv_atr_req, NULL); | |
300 | } | |
301 | ||
bf30a67c MG |
302 | static int digital_tg_listen_md(struct nfc_digital_dev *ddev, u8 rf_tech) |
303 | { | |
304 | return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MD, NULL, NULL, 500, | |
305 | digital_tg_recv_md_req, NULL); | |
306 | } | |
307 | ||
2c66daec TE |
308 | int digital_target_found(struct nfc_digital_dev *ddev, |
309 | struct nfc_target *target, u8 protocol) | |
310 | { | |
311 | int rc; | |
312 | u8 framing; | |
313 | u8 rf_tech; | |
0529a7ad | 314 | u8 poll_tech_count; |
2c66daec TE |
315 | int (*check_crc)(struct sk_buff *skb); |
316 | void (*add_crc)(struct sk_buff *skb); | |
317 | ||
318 | rf_tech = ddev->poll_techs[ddev->poll_tech_index].rf_tech; | |
319 | ||
320 | switch (protocol) { | |
321 | case NFC_PROTO_JEWEL: | |
322 | framing = NFC_DIGITAL_FRAMING_NFCA_T1T; | |
323 | check_crc = digital_skb_check_crc_b; | |
324 | add_crc = digital_skb_add_crc_b; | |
325 | break; | |
326 | ||
327 | case NFC_PROTO_MIFARE: | |
328 | framing = NFC_DIGITAL_FRAMING_NFCA_T2T; | |
329 | check_crc = digital_skb_check_crc_a; | |
330 | add_crc = digital_skb_add_crc_a; | |
331 | break; | |
332 | ||
8c0695e4 TE |
333 | case NFC_PROTO_FELICA: |
334 | framing = NFC_DIGITAL_FRAMING_NFCF_T3T; | |
335 | check_crc = digital_skb_check_crc_f; | |
336 | add_crc = digital_skb_add_crc_f; | |
337 | break; | |
338 | ||
7d0911c0 TE |
339 | case NFC_PROTO_NFC_DEP: |
340 | if (rf_tech == NFC_DIGITAL_RF_TECH_106A) { | |
341 | framing = NFC_DIGITAL_FRAMING_NFCA_NFC_DEP; | |
342 | check_crc = digital_skb_check_crc_a; | |
343 | add_crc = digital_skb_add_crc_a; | |
344 | } else { | |
345 | framing = NFC_DIGITAL_FRAMING_NFCF_NFC_DEP; | |
346 | check_crc = digital_skb_check_crc_f; | |
347 | add_crc = digital_skb_add_crc_f; | |
348 | } | |
349 | break; | |
350 | ||
a381d482 | 351 | case NFC_PROTO_ISO15693: |
ceeee42d | 352 | framing = NFC_DIGITAL_FRAMING_ISO15693_T5T; |
a381d482 MG |
353 | check_crc = digital_skb_check_crc_b; |
354 | add_crc = digital_skb_add_crc_b; | |
564af14e | 355 | break; |
12e3d241 TE |
356 | |
357 | case NFC_PROTO_ISO14443: | |
358 | framing = NFC_DIGITAL_FRAMING_NFCA_T4T; | |
359 | check_crc = digital_skb_check_crc_a; | |
360 | add_crc = digital_skb_add_crc_a; | |
a381d482 MG |
361 | break; |
362 | ||
24734607 MG |
363 | case NFC_PROTO_ISO14443_B: |
364 | framing = NFC_DIGITAL_FRAMING_NFCB_T4T; | |
365 | check_crc = digital_skb_check_crc_b; | |
366 | add_crc = digital_skb_add_crc_b; | |
367 | break; | |
368 | ||
2c66daec | 369 | default: |
26042530 | 370 | pr_err("Invalid protocol %d\n", protocol); |
2c66daec TE |
371 | return -EINVAL; |
372 | } | |
373 | ||
26042530 | 374 | pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol); |
2c66daec TE |
375 | |
376 | ddev->curr_rf_tech = rf_tech; | |
2c66daec TE |
377 | |
378 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
379 | ddev->skb_add_crc = digital_skb_add_crc_none; | |
380 | ddev->skb_check_crc = digital_skb_check_crc_none; | |
381 | } else { | |
382 | ddev->skb_add_crc = add_crc; | |
383 | ddev->skb_check_crc = check_crc; | |
384 | } | |
385 | ||
386 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing); | |
387 | if (rc) | |
388 | return rc; | |
389 | ||
390 | target->supported_protocols = (1 << protocol); | |
2c66daec | 391 | |
0529a7ad | 392 | poll_tech_count = ddev->poll_tech_count; |
2c66daec TE |
393 | ddev->poll_tech_count = 0; |
394 | ||
0529a7ad MG |
395 | rc = nfc_targets_found(ddev->nfc_dev, target, 1); |
396 | if (rc) { | |
397 | ddev->poll_tech_count = poll_tech_count; | |
398 | return rc; | |
399 | } | |
400 | ||
2c66daec TE |
401 | return 0; |
402 | } | |
403 | ||
59ee2361 TE |
404 | void digital_poll_next_tech(struct nfc_digital_dev *ddev) |
405 | { | |
9dc33705 TE |
406 | u8 rand_mod; |
407 | ||
59ee2361 TE |
408 | digital_switch_rf(ddev, 0); |
409 | ||
410 | mutex_lock(&ddev->poll_lock); | |
411 | ||
412 | if (!ddev->poll_tech_count) { | |
413 | mutex_unlock(&ddev->poll_lock); | |
414 | return; | |
415 | } | |
416 | ||
9dc33705 TE |
417 | get_random_bytes(&rand_mod, sizeof(rand_mod)); |
418 | ddev->poll_tech_index = rand_mod % ddev->poll_tech_count; | |
59ee2361 TE |
419 | |
420 | mutex_unlock(&ddev->poll_lock); | |
421 | ||
422 | schedule_work(&ddev->poll_work); | |
423 | } | |
424 | ||
425 | static void digital_wq_poll(struct work_struct *work) | |
426 | { | |
427 | int rc; | |
428 | struct digital_poll_tech *poll_tech; | |
429 | struct nfc_digital_dev *ddev = container_of(work, | |
430 | struct nfc_digital_dev, | |
431 | poll_work); | |
432 | mutex_lock(&ddev->poll_lock); | |
433 | ||
434 | if (!ddev->poll_tech_count) { | |
435 | mutex_unlock(&ddev->poll_lock); | |
436 | return; | |
437 | } | |
438 | ||
439 | poll_tech = &ddev->poll_techs[ddev->poll_tech_index]; | |
440 | ||
441 | mutex_unlock(&ddev->poll_lock); | |
442 | ||
443 | rc = poll_tech->poll_func(ddev, poll_tech->rf_tech); | |
444 | if (rc) | |
445 | digital_poll_next_tech(ddev); | |
446 | } | |
447 | ||
448 | static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech, | |
449 | digital_poll_t poll_func) | |
450 | { | |
451 | struct digital_poll_tech *poll_tech; | |
452 | ||
453 | if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX) | |
454 | return; | |
455 | ||
456 | poll_tech = &ddev->poll_techs[ddev->poll_tech_count++]; | |
457 | ||
458 | poll_tech->rf_tech = rf_tech; | |
459 | poll_tech->poll_func = poll_func; | |
460 | } | |
461 | ||
462 | /** | |
463 | * start_poll operation | |
464 | * | |
465 | * For every supported protocol, the corresponding polling function is added | |
466 | * to the table of polling technologies (ddev->poll_techs[]) using | |
467 | * digital_add_poll_tech(). | |
468 | * When a polling function fails (by timeout or protocol error) the next one is | |
469 | * schedule by digital_poll_next_tech() on the poll workqueue (ddev->poll_work). | |
470 | */ | |
4b10884e TE |
471 | static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols, |
472 | __u32 tm_protocols) | |
473 | { | |
59ee2361 TE |
474 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
475 | u32 matching_im_protocols, matching_tm_protocols; | |
476 | ||
26042530 | 477 | pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols, |
c5da0e4a | 478 | tm_protocols, ddev->protocols); |
59ee2361 TE |
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) { | |
26042530 | 484 | pr_err("Unknown protocol\n"); |
59ee2361 TE |
485 | return -EINVAL; |
486 | } | |
487 | ||
488 | if (ddev->poll_tech_count) { | |
26042530 | 489 | pr_err("Already polling\n"); |
59ee2361 TE |
490 | return -EBUSY; |
491 | } | |
492 | ||
493 | if (ddev->curr_protocol) { | |
26042530 | 494 | pr_err("A target is already active\n"); |
59ee2361 TE |
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 | ||
24734607 MG |
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 | ||
4f913d46 | 509 | if (matching_im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) { |
8c0695e4 TE |
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 | ||
a381d482 MG |
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 | ||
4f913d46 | 521 | if (matching_tm_protocols & NFC_PROTO_NFC_DEP_MASK) { |
1c7a4c24 TE |
522 | if (ddev->ops->tg_listen_mdaa) { |
523 | digital_add_poll_tech(ddev, 0, | |
524 | digital_tg_listen_mdaa); | |
bf30a67c MG |
525 | } else if (ddev->ops->tg_listen_md) { |
526 | digital_add_poll_tech(ddev, 0, | |
527 | digital_tg_listen_md); | |
1c7a4c24 TE |
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 | ||
59ee2361 | 540 | if (!ddev->poll_tech_count) { |
26042530 | 541 | pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n", |
59ee2361 TE |
542 | matching_im_protocols, matching_tm_protocols); |
543 | return -EINVAL; | |
544 | } | |
545 | ||
546 | schedule_work(&ddev->poll_work); | |
547 | ||
548 | return 0; | |
4b10884e TE |
549 | } |
550 | ||
551 | static void digital_stop_poll(struct nfc_dev *nfc_dev) | |
552 | { | |
59ee2361 TE |
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) { | |
26042530 | 558 | pr_err("Polling operation was not running\n"); |
59ee2361 TE |
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_work_sync(&ddev->poll_work); | |
568 | ||
569 | digital_abort_cmd(ddev); | |
4b10884e TE |
570 | } |
571 | ||
572 | static int digital_dev_up(struct nfc_dev *nfc_dev) | |
573 | { | |
59ee2361 TE |
574 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
575 | ||
576 | digital_switch_rf(ddev, 1); | |
577 | ||
578 | return 0; | |
4b10884e TE |
579 | } |
580 | ||
581 | static int digital_dev_down(struct nfc_dev *nfc_dev) | |
582 | { | |
59ee2361 TE |
583 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
584 | ||
585 | digital_switch_rf(ddev, 0); | |
586 | ||
587 | return 0; | |
4b10884e TE |
588 | } |
589 | ||
590 | static 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 | { | |
7d0911c0 | 594 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
48e10445 TE |
595 | int rc; |
596 | ||
597 | rc = digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len); | |
7d0911c0 | 598 | |
48e10445 TE |
599 | if (!rc) |
600 | ddev->curr_protocol = NFC_PROTO_NFC_DEP; | |
601 | ||
602 | return rc; | |
4b10884e TE |
603 | } |
604 | ||
605 | static int digital_dep_link_down(struct nfc_dev *nfc_dev) | |
606 | { | |
7d0911c0 TE |
607 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
608 | ||
609 | ddev->curr_protocol = 0; | |
610 | ||
611 | return 0; | |
4b10884e TE |
612 | } |
613 | ||
614 | static int digital_activate_target(struct nfc_dev *nfc_dev, | |
615 | struct nfc_target *target, __u32 protocol) | |
616 | { | |
48e10445 TE |
617 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
618 | ||
619 | if (ddev->poll_tech_count) { | |
620 | pr_err("Can't activate a target while polling\n"); | |
621 | return -EBUSY; | |
622 | } | |
623 | ||
624 | if (ddev->curr_protocol) { | |
625 | pr_err("A target is already active\n"); | |
626 | return -EBUSY; | |
627 | } | |
628 | ||
629 | ddev->curr_protocol = protocol; | |
630 | ||
59ee2361 | 631 | return 0; |
4b10884e TE |
632 | } |
633 | ||
634 | static void digital_deactivate_target(struct nfc_dev *nfc_dev, | |
96d4581f CR |
635 | struct nfc_target *target, |
636 | u8 mode) | |
4b10884e | 637 | { |
59ee2361 TE |
638 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
639 | ||
48e10445 TE |
640 | if (!ddev->curr_protocol) { |
641 | pr_err("No active target\n"); | |
642 | return; | |
643 | } | |
644 | ||
59ee2361 | 645 | ddev->curr_protocol = 0; |
4b10884e TE |
646 | } |
647 | ||
648 | static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb) | |
649 | { | |
1c7a4c24 TE |
650 | struct nfc_digital_dev *ddev = nfc_get_drvdata(dev); |
651 | ||
652 | return digital_tg_send_dep_res(ddev, skb); | |
4b10884e TE |
653 | } |
654 | ||
2c66daec TE |
655 | static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg, |
656 | struct sk_buff *resp) | |
657 | { | |
658 | struct digital_data_exch *data_exch = arg; | |
659 | int rc; | |
660 | ||
661 | if (IS_ERR(resp)) { | |
662 | rc = PTR_ERR(resp); | |
c813007f | 663 | resp = NULL; |
2c66daec TE |
664 | goto done; |
665 | } | |
666 | ||
c813007f | 667 | if (ddev->curr_protocol == NFC_PROTO_MIFARE) { |
2c66daec | 668 | rc = digital_in_recv_mifare_res(resp); |
c813007f TE |
669 | /* crc check is done in digital_in_recv_mifare_res() */ |
670 | goto done; | |
671 | } | |
672 | ||
24734607 MG |
673 | if ((ddev->curr_protocol == NFC_PROTO_ISO14443) || |
674 | (ddev->curr_protocol == NFC_PROTO_ISO14443_B)) { | |
c813007f TE |
675 | rc = digital_in_iso_dep_pull_sod(ddev, resp); |
676 | if (rc) | |
677 | goto done; | |
678 | } | |
679 | ||
680 | rc = ddev->skb_check_crc(resp); | |
2c66daec | 681 | |
c813007f | 682 | done: |
2c66daec TE |
683 | if (rc) { |
684 | kfree_skb(resp); | |
685 | resp = NULL; | |
686 | } | |
687 | ||
2c66daec TE |
688 | data_exch->cb(data_exch->cb_context, resp, rc); |
689 | ||
690 | kfree(data_exch); | |
691 | } | |
692 | ||
4b10884e TE |
693 | static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target, |
694 | struct sk_buff *skb, data_exchange_cb_t cb, | |
695 | void *cb_context) | |
696 | { | |
2c66daec TE |
697 | struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev); |
698 | struct digital_data_exch *data_exch; | |
c813007f | 699 | int rc; |
2c66daec TE |
700 | |
701 | data_exch = kzalloc(sizeof(struct digital_data_exch), GFP_KERNEL); | |
702 | if (!data_exch) { | |
26042530 | 703 | pr_err("Failed to allocate data_exch struct\n"); |
2c66daec TE |
704 | return -ENOMEM; |
705 | } | |
706 | ||
707 | data_exch->cb = cb; | |
708 | data_exch->cb_context = cb_context; | |
709 | ||
6ea7398d TE |
710 | if (ddev->curr_protocol == NFC_PROTO_NFC_DEP) { |
711 | rc = digital_in_send_dep_req(ddev, target, skb, data_exch); | |
712 | goto exit; | |
713 | } | |
7d0911c0 | 714 | |
24734607 MG |
715 | if ((ddev->curr_protocol == NFC_PROTO_ISO14443) || |
716 | (ddev->curr_protocol == NFC_PROTO_ISO14443_B)) { | |
c813007f TE |
717 | rc = digital_in_iso_dep_push_sod(ddev, skb); |
718 | if (rc) | |
6ea7398d | 719 | goto exit; |
c813007f TE |
720 | } |
721 | ||
2c66daec TE |
722 | ddev->skb_add_crc(skb); |
723 | ||
6ea7398d TE |
724 | rc = digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete, |
725 | data_exch); | |
726 | ||
727 | exit: | |
728 | if (rc) | |
729 | kfree(data_exch); | |
730 | ||
731 | return rc; | |
4b10884e TE |
732 | } |
733 | ||
734 | static struct nfc_ops digital_nfc_ops = { | |
735 | .dev_up = digital_dev_up, | |
736 | .dev_down = digital_dev_down, | |
737 | .start_poll = digital_start_poll, | |
738 | .stop_poll = digital_stop_poll, | |
739 | .dep_link_up = digital_dep_link_up, | |
740 | .dep_link_down = digital_dep_link_down, | |
741 | .activate_target = digital_activate_target, | |
742 | .deactivate_target = digital_deactivate_target, | |
743 | .tm_send = digital_tg_send, | |
744 | .im_transceive = digital_in_send, | |
745 | }; | |
746 | ||
747 | struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops, | |
748 | __u32 supported_protocols, | |
749 | __u32 driver_capabilities, | |
750 | int tx_headroom, int tx_tailroom) | |
751 | { | |
752 | struct nfc_digital_dev *ddev; | |
753 | ||
754 | if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen || | |
755 | !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd || | |
bf30a67c | 756 | !ops->switch_rf || (ops->tg_listen_md && !ops->tg_get_rf_tech)) |
4b10884e TE |
757 | return NULL; |
758 | ||
759 | ddev = kzalloc(sizeof(struct nfc_digital_dev), GFP_KERNEL); | |
26042530 | 760 | if (!ddev) |
4b10884e | 761 | return NULL; |
4b10884e TE |
762 | |
763 | ddev->driver_capabilities = driver_capabilities; | |
764 | ddev->ops = ops; | |
765 | ||
59ee2361 TE |
766 | mutex_init(&ddev->cmd_lock); |
767 | INIT_LIST_HEAD(&ddev->cmd_queue); | |
768 | ||
769 | INIT_WORK(&ddev->cmd_work, digital_wq_cmd); | |
770 | INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete); | |
771 | ||
772 | mutex_init(&ddev->poll_lock); | |
773 | INIT_WORK(&ddev->poll_work, digital_wq_poll); | |
774 | ||
775 | if (supported_protocols & NFC_PROTO_JEWEL_MASK) | |
776 | ddev->protocols |= NFC_PROTO_JEWEL_MASK; | |
777 | if (supported_protocols & NFC_PROTO_MIFARE_MASK) | |
778 | ddev->protocols |= NFC_PROTO_MIFARE_MASK; | |
8c0695e4 TE |
779 | if (supported_protocols & NFC_PROTO_FELICA_MASK) |
780 | ddev->protocols |= NFC_PROTO_FELICA_MASK; | |
7d0911c0 TE |
781 | if (supported_protocols & NFC_PROTO_NFC_DEP_MASK) |
782 | ddev->protocols |= NFC_PROTO_NFC_DEP_MASK; | |
a381d482 MG |
783 | if (supported_protocols & NFC_PROTO_ISO15693_MASK) |
784 | ddev->protocols |= NFC_PROTO_ISO15693_MASK; | |
12e3d241 TE |
785 | if (supported_protocols & NFC_PROTO_ISO14443_MASK) |
786 | ddev->protocols |= NFC_PROTO_ISO14443_MASK; | |
24734607 MG |
787 | if (supported_protocols & NFC_PROTO_ISO14443_B_MASK) |
788 | ddev->protocols |= NFC_PROTO_ISO14443_B_MASK; | |
59ee2361 TE |
789 | |
790 | ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN; | |
791 | ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN; | |
4b10884e TE |
792 | |
793 | ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols, | |
794 | ddev->tx_headroom, | |
795 | ddev->tx_tailroom); | |
796 | if (!ddev->nfc_dev) { | |
26042530 | 797 | pr_err("nfc_allocate_device failed\n"); |
4b10884e TE |
798 | goto free_dev; |
799 | } | |
800 | ||
801 | nfc_set_drvdata(ddev->nfc_dev, ddev); | |
802 | ||
803 | return ddev; | |
804 | ||
805 | free_dev: | |
806 | kfree(ddev); | |
807 | ||
808 | return NULL; | |
809 | } | |
810 | EXPORT_SYMBOL(nfc_digital_allocate_device); | |
811 | ||
812 | void nfc_digital_free_device(struct nfc_digital_dev *ddev) | |
813 | { | |
814 | nfc_free_device(ddev->nfc_dev); | |
4b10884e TE |
815 | kfree(ddev); |
816 | } | |
817 | EXPORT_SYMBOL(nfc_digital_free_device); | |
818 | ||
819 | int nfc_digital_register_device(struct nfc_digital_dev *ddev) | |
820 | { | |
821 | return nfc_register_device(ddev->nfc_dev); | |
822 | } | |
823 | EXPORT_SYMBOL(nfc_digital_register_device); | |
824 | ||
825 | void nfc_digital_unregister_device(struct nfc_digital_dev *ddev) | |
826 | { | |
59ee2361 TE |
827 | struct digital_cmd *cmd, *n; |
828 | ||
4b10884e | 829 | nfc_unregister_device(ddev->nfc_dev); |
59ee2361 TE |
830 | |
831 | mutex_lock(&ddev->poll_lock); | |
832 | ddev->poll_tech_count = 0; | |
833 | mutex_unlock(&ddev->poll_lock); | |
834 | ||
835 | cancel_work_sync(&ddev->poll_work); | |
836 | cancel_work_sync(&ddev->cmd_work); | |
837 | cancel_work_sync(&ddev->cmd_complete_work); | |
838 | ||
839 | list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) { | |
840 | list_del(&cmd->queue); | |
1c7a4c24 | 841 | kfree(cmd->mdaa_params); |
59ee2361 TE |
842 | kfree(cmd); |
843 | } | |
4b10884e TE |
844 | } |
845 | EXPORT_SYMBOL(nfc_digital_unregister_device); | |
846 | ||
847 | MODULE_LICENSE("GPL"); |