?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
arch/sparc/kernel/sys_sparc_64.c: s/COLOUR/COLOR/
[linux-2.6.git] / drivers / nfc / pn533.c
blob30ae18a03a9ccc650a195547086866a66646cd98
1 /*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24 #include <linux/device.h>
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/usb.h>
29 #include <linux/nfc.h>
30 #include <linux/netdevice.h>
31 #include <net/nfc/nfc.h>
32
33 #define VERSION "0.1"
34
35 #define PN533_VENDOR_ID 0x4CC
36 #define PN533_PRODUCT_ID 0x2533
37
38 #define SCM_VENDOR_ID 0x4E6
39 #define SCL3711_PRODUCT_ID 0x5591
40
41 #define SONY_VENDOR_ID 0x054c
42 #define PASORI_PRODUCT_ID 0x02e1
43
44 #define PN533_QUIRKS_TYPE_A BIT(0)
45 #define PN533_QUIRKS_TYPE_F BIT(1)
46 #define PN533_QUIRKS_DEP BIT(2)
47 #define PN533_QUIRKS_RAW_EXCHANGE BIT(3)
48
49 #define PN533_DEVICE_STD 0x1
50 #define PN533_DEVICE_PASORI 0x2
51
52 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
53 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
54 NFC_PROTO_NFC_DEP_MASK |\
55 NFC_PROTO_ISO14443_B_MASK)
56
57 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
58 NFC_PROTO_MIFARE_MASK | \
59 NFC_PROTO_FELICA_MASK | \
60 NFC_PROTO_ISO14443_MASK | \
61 NFC_PROTO_NFC_DEP_MASK)
62
63 static const struct usb_device_id pn533_table[] = {
64 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
65 .idVendor = PN533_VENDOR_ID,
66 .idProduct = PN533_PRODUCT_ID,
67 .driver_info = PN533_DEVICE_STD,
68 },
69 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
70 .idVendor = SCM_VENDOR_ID,
71 .idProduct = SCL3711_PRODUCT_ID,
72 .driver_info = PN533_DEVICE_STD,
73 },
74 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
75 .idVendor = SONY_VENDOR_ID,
76 .idProduct = PASORI_PRODUCT_ID,
77 .driver_info = PN533_DEVICE_PASORI,
78 },
79 { }
80 };
81 MODULE_DEVICE_TABLE(usb, pn533_table);
82
83 /* How much time we spend listening for initiators */
84 #define PN533_LISTEN_TIME 2
85
86 /* frame definitions */
87 #define PN533_FRAME_TAIL_SIZE 2
88 #define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
89 PN533_FRAME_TAIL_SIZE)
90 #define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
91 #define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
92 #define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
93
94 /* start of frame */
95 #define PN533_SOF 0x00FF
96
97 /* frame identifier: in/out/error */
98 #define PN533_FRAME_IDENTIFIER(f) (f->data[0])
99 #define PN533_DIR_OUT 0xD4
100 #define PN533_DIR_IN 0xD5
101
102 /* PN533 Commands */
103 #define PN533_FRAME_CMD(f) (f->data[1])
104 #define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
105 #define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
106
107 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
108 #define PN533_CMD_RF_CONFIGURATION 0x32
109 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
110 #define PN533_CMD_IN_COMM_THRU 0x42
111 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
112 #define PN533_CMD_IN_ATR 0x50
113 #define PN533_CMD_IN_RELEASE 0x52
114 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
115
116 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
117 #define PN533_CMD_TG_GET_DATA 0x86
118 #define PN533_CMD_TG_SET_DATA 0x8e
119
120 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
121
122 /* PN533 Return codes */
123 #define PN533_CMD_RET_MASK 0x3F
124 #define PN533_CMD_MI_MASK 0x40
125 #define PN533_CMD_RET_SUCCESS 0x00
126
127 /* PN533 status codes */
128 #define PN533_STATUS_TARGET_RELEASED 0x29
129
130 struct pn533;
131
132 typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
133 u8 *params, int params_len);
134
135 /* structs for pn533 commands */
136
137 /* PN533_CMD_GET_FIRMWARE_VERSION */
138 struct pn533_fw_version {
139 u8 ic;
140 u8 ver;
141 u8 rev;
142 u8 support;
143 };
144
145 /* PN533_CMD_RF_CONFIGURATION */
146 #define PN533_CFGITEM_TIMING 0x02
147 #define PN533_CFGITEM_MAX_RETRIES 0x05
148 #define PN533_CFGITEM_PASORI 0x82
149
150 #define PN533_CONFIG_TIMING_102 0xb
151 #define PN533_CONFIG_TIMING_204 0xc
152 #define PN533_CONFIG_TIMING_409 0xd
153 #define PN533_CONFIG_TIMING_819 0xe
154
155 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
156 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
157
158 struct pn533_config_max_retries {
159 u8 mx_rty_atr;
160 u8 mx_rty_psl;
161 u8 mx_rty_passive_act;
162 } __packed;
163
164 struct pn533_config_timing {
165 u8 rfu;
166 u8 atr_res_timeout;
167 u8 dep_timeout;
168 } __packed;
169
170 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
171
172 /* felica commands opcode */
173 #define PN533_FELICA_OPC_SENSF_REQ 0
174 #define PN533_FELICA_OPC_SENSF_RES 1
175 /* felica SENSF_REQ parameters */
176 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
177 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
178 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
179 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
180
181 /* type B initiator_data values */
182 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
183 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
184 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
185
186 union pn533_cmd_poll_initdata {
187 struct {
188 u8 afi;
189 u8 polling_method;
190 } __packed type_b;
191 struct {
192 u8 opcode;
193 __be16 sc;
194 u8 rc;
195 u8 tsn;
196 } __packed felica;
197 };
198
199 /* Poll modulations */
200 enum {
201 PN533_POLL_MOD_106KBPS_A,
202 PN533_POLL_MOD_212KBPS_FELICA,
203 PN533_POLL_MOD_424KBPS_FELICA,
204 PN533_POLL_MOD_106KBPS_JEWEL,
205 PN533_POLL_MOD_847KBPS_B,
206 PN533_LISTEN_MOD,
207
208 __PN533_POLL_MOD_AFTER_LAST,
209 };
210 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
211
212 struct pn533_poll_modulations {
213 struct {
214 u8 maxtg;
215 u8 brty;
216 union pn533_cmd_poll_initdata initiator_data;
217 } __packed data;
218 u8 len;
219 };
220
221 const struct pn533_poll_modulations poll_mod[] = {
222 [PN533_POLL_MOD_106KBPS_A] = {
223 .data = {
224 .maxtg = 1,
225 .brty = 0,
226 },
227 .len = 2,
228 },
229 [PN533_POLL_MOD_212KBPS_FELICA] = {
230 .data = {
231 .maxtg = 1,
232 .brty = 1,
233 .initiator_data.felica = {
234 .opcode = PN533_FELICA_OPC_SENSF_REQ,
235 .sc = PN533_FELICA_SENSF_SC_ALL,
236 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
237 .tsn = 0,
238 },
239 },
240 .len = 7,
241 },
242 [PN533_POLL_MOD_424KBPS_FELICA] = {
243 .data = {
244 .maxtg = 1,
245 .brty = 2,
246 .initiator_data.felica = {
247 .opcode = PN533_FELICA_OPC_SENSF_REQ,
248 .sc = PN533_FELICA_SENSF_SC_ALL,
249 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
250 .tsn = 0,
251 },
252 },
253 .len = 7,
254 },
255 [PN533_POLL_MOD_106KBPS_JEWEL] = {
256 .data = {
257 .maxtg = 1,
258 .brty = 4,
259 },
260 .len = 2,
261 },
262 [PN533_POLL_MOD_847KBPS_B] = {
263 .data = {
264 .maxtg = 1,
265 .brty = 8,
266 .initiator_data.type_b = {
267 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
268 .polling_method =
269 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
270 },
271 },
272 .len = 3,
273 },
274 [PN533_LISTEN_MOD] = {
275 .len = 0,
276 },
277 };
278
279 /* PN533_CMD_IN_ATR */
280
281 struct pn533_cmd_activate_param {
282 u8 tg;
283 u8 next;
284 } __packed;
285
286 struct pn533_cmd_activate_response {
287 u8 status;
288 u8 nfcid3t[10];
289 u8 didt;
290 u8 bst;
291 u8 brt;
292 u8 to;
293 u8 ppt;
294 /* optional */
295 u8 gt[];
296 } __packed;
297
298 /* PN533_CMD_IN_JUMP_FOR_DEP */
299 struct pn533_cmd_jump_dep {
300 u8 active;
301 u8 baud;
302 u8 next;
303 u8 data[];
304 } __packed;
305
306 struct pn533_cmd_jump_dep_response {
307 u8 status;
308 u8 tg;
309 u8 nfcid3t[10];
310 u8 didt;
311 u8 bst;
312 u8 brt;
313 u8 to;
314 u8 ppt;
315 /* optional */
316 u8 gt[];
317 } __packed;
318
319
320 /* PN533_TG_INIT_AS_TARGET */
321 #define PN533_INIT_TARGET_PASSIVE 0x1
322 #define PN533_INIT_TARGET_DEP 0x2
323
324 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
325 #define PN533_INIT_TARGET_RESP_ACTIVE 0x1
326 #define PN533_INIT_TARGET_RESP_DEP 0x4
327
328 struct pn533_cmd_init_target {
329 u8 mode;
330 u8 mifare[6];
331 u8 felica[18];
332 u8 nfcid3[10];
333 u8 gb_len;
334 u8 gb[];
335 } __packed;
336
337 struct pn533_cmd_init_target_response {
338 u8 mode;
339 u8 cmd[];
340 } __packed;
341
342 struct pn533 {
343 struct usb_device *udev;
344 struct usb_interface *interface;
345 struct nfc_dev *nfc_dev;
346
347 struct urb *out_urb;
348 int out_maxlen;
349 struct pn533_frame *out_frame;
350
351 struct urb *in_urb;
352 int in_maxlen;
353 struct pn533_frame *in_frame;
354
355 struct sk_buff_head resp_q;
356
357 struct workqueue_struct *wq;
358 struct work_struct cmd_work;
359 struct work_struct cmd_complete_work;
360 struct work_struct poll_work;
361 struct work_struct mi_work;
362 struct work_struct tg_work;
363 struct timer_list listen_timer;
364 struct pn533_frame *wq_in_frame;
365 int wq_in_error;
366 int cancel_listen;
367
368 pn533_cmd_complete_t cmd_complete;
369 void *cmd_complete_arg;
370 struct mutex cmd_lock;
371 u8 cmd;
372
373 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
374 u8 poll_mod_count;
375 u8 poll_mod_curr;
376 u32 poll_protocols;
377 u32 listen_protocols;
378
379 u8 *gb;
380 size_t gb_len;
381
382 u8 tgt_available_prots;
383 u8 tgt_active_prot;
384 u8 tgt_mode;
385
386 u32 device_type;
387
388 struct list_head cmd_queue;
389 u8 cmd_pending;
390 };
391
392 struct pn533_cmd {
393 struct list_head queue;
394 struct pn533_frame *out_frame;
395 struct pn533_frame *in_frame;
396 int in_frame_len;
397 pn533_cmd_complete_t cmd_complete;
398 void *arg;
399 gfp_t flags;
400 };
401
402 struct pn533_frame {
403 u8 preamble;
404 __be16 start_frame;
405 u8 datalen;
406 u8 datalen_checksum;
407 u8 data[];
408 } __packed;
409
410 /* The rule: value + checksum = 0 */
411 static inline u8 pn533_checksum(u8 value)
412 {
413 return ~value + 1;
414 }
415
416 /* The rule: sum(data elements) + checksum = 0 */
417 static u8 pn533_data_checksum(u8 *data, int datalen)
418 {
419 u8 sum = 0;
420 int i;
421
422 for (i = 0; i < datalen; i++)
423 sum += data[i];
424
425 return pn533_checksum(sum);
426 }
427
428 /**
429 * pn533_tx_frame_ack - create a ack frame
430 * @frame: The frame to be set as ack
431 *
432 * Ack is different type of standard frame. As a standard frame, it has
433 * preamble and start_frame. However the checksum of this frame must fail,
434 * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
435 * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
436 * After datalen_checksum field, the postamble is placed.
437 */
438 static void pn533_tx_frame_ack(struct pn533_frame *frame)
439 {
440 frame->preamble = 0;
441 frame->start_frame = cpu_to_be16(PN533_SOF);
442 frame->datalen = 0;
443 frame->datalen_checksum = 0xFF;
444 /* data[0] is used as postamble */
445 frame->data[0] = 0;
446 }
447
448 static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
449 {
450 frame->preamble = 0;
451 frame->start_frame = cpu_to_be16(PN533_SOF);
452 PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
453 PN533_FRAME_CMD(frame) = cmd;
454 frame->datalen = 2;
455 }
456
457 static void pn533_tx_frame_finish(struct pn533_frame *frame)
458 {
459 frame->datalen_checksum = pn533_checksum(frame->datalen);
460
461 PN533_FRAME_CHECKSUM(frame) =
462 pn533_data_checksum(frame->data, frame->datalen);
463
464 PN533_FRAME_POSTAMBLE(frame) = 0;
465 }
466
467 static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
468 {
469 u8 checksum;
470
471 if (frame->start_frame != cpu_to_be16(PN533_SOF))
472 return false;
473
474 checksum = pn533_checksum(frame->datalen);
475 if (checksum != frame->datalen_checksum)
476 return false;
477
478 checksum = pn533_data_checksum(frame->data, frame->datalen);
479 if (checksum != PN533_FRAME_CHECKSUM(frame))
480 return false;
481
482 return true;
483 }
484
485 static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
486 {
487 if (frame->start_frame != cpu_to_be16(PN533_SOF))
488 return false;
489
490 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
491 return false;
492
493 return true;
494 }
495
496 static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
497 {
498 return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
499 }
500
501
502 static void pn533_wq_cmd_complete(struct work_struct *work)
503 {
504 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
505 struct pn533_frame *in_frame;
506 int rc;
507
508 in_frame = dev->wq_in_frame;
509
510 if (dev->wq_in_error)
511 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
512 dev->wq_in_error);
513 else
514 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
515 PN533_FRAME_CMD_PARAMS_PTR(in_frame),
516 PN533_FRAME_CMD_PARAMS_LEN(in_frame));
517
518 if (rc != -EINPROGRESS)
519 queue_work(dev->wq, &dev->cmd_work);
520 }
521
522 static void pn533_recv_response(struct urb *urb)
523 {
524 struct pn533 *dev = urb->context;
525 struct pn533_frame *in_frame;
526
527 dev->wq_in_frame = NULL;
528
529 switch (urb->status) {
530 case 0:
531 /* success */
532 break;
533 case -ECONNRESET:
534 case -ENOENT:
535 case -ESHUTDOWN:
536 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
537 " status: %d", urb->status);
538 dev->wq_in_error = urb->status;
539 goto sched_wq;
540 default:
541 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
542 " %d", urb->status);
543 dev->wq_in_error = urb->status;
544 goto sched_wq;
545 }
546
547 in_frame = dev->in_urb->transfer_buffer;
548
549 if (!pn533_rx_frame_is_valid(in_frame)) {
550 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
551 dev->wq_in_error = -EIO;
552 goto sched_wq;
553 }
554
555 if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
556 nfc_dev_err(&dev->interface->dev, "The received frame is not "
557 "response to the last command");
558 dev->wq_in_error = -EIO;
559 goto sched_wq;
560 }
561
562 nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
563 dev->wq_in_error = 0;
564 dev->wq_in_frame = in_frame;
565
566 sched_wq:
567 queue_work(dev->wq, &dev->cmd_complete_work);
568 }
569
570 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
571 {
572 dev->in_urb->complete = pn533_recv_response;
573
574 return usb_submit_urb(dev->in_urb, flags);
575 }
576
577 static void pn533_recv_ack(struct urb *urb)
578 {
579 struct pn533 *dev = urb->context;
580 struct pn533_frame *in_frame;
581 int rc;
582
583 switch (urb->status) {
584 case 0:
585 /* success */
586 break;
587 case -ECONNRESET:
588 case -ENOENT:
589 case -ESHUTDOWN:
590 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
591 " status: %d", urb->status);
592 dev->wq_in_error = urb->status;
593 goto sched_wq;
594 default:
595 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
596 " %d", urb->status);
597 dev->wq_in_error = urb->status;
598 goto sched_wq;
599 }
600
601 in_frame = dev->in_urb->transfer_buffer;
602
603 if (!pn533_rx_frame_is_ack(in_frame)) {
604 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
605 dev->wq_in_error = -EIO;
606 goto sched_wq;
607 }
608
609 nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
610
611 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
612 if (rc) {
613 nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
614 " result %d", rc);
615 dev->wq_in_error = rc;
616 goto sched_wq;
617 }
618
619 return;
620
621 sched_wq:
622 dev->wq_in_frame = NULL;
623 queue_work(dev->wq, &dev->cmd_complete_work);
624 }
625
626 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
627 {
628 dev->in_urb->complete = pn533_recv_ack;
629
630 return usb_submit_urb(dev->in_urb, flags);
631 }
632
633 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
634 {
635 int rc;
636
637 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
638
639 pn533_tx_frame_ack(dev->out_frame);
640
641 dev->out_urb->transfer_buffer = dev->out_frame;
642 dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
643 rc = usb_submit_urb(dev->out_urb, flags);
644
645 return rc;
646 }
647
648 static int __pn533_send_cmd_frame_async(struct pn533 *dev,
649 struct pn533_frame *out_frame,
650 struct pn533_frame *in_frame,
651 int in_frame_len,
652 pn533_cmd_complete_t cmd_complete,
653 void *arg, gfp_t flags)
654 {
655 int rc;
656
657 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
658 PN533_FRAME_CMD(out_frame));
659
660 dev->cmd = PN533_FRAME_CMD(out_frame);
661 dev->cmd_complete = cmd_complete;
662 dev->cmd_complete_arg = arg;
663
664 dev->out_urb->transfer_buffer = out_frame;
665 dev->out_urb->transfer_buffer_length =
666 PN533_FRAME_SIZE(out_frame);
667
668 dev->in_urb->transfer_buffer = in_frame;
669 dev->in_urb->transfer_buffer_length = in_frame_len;
670
671 rc = usb_submit_urb(dev->out_urb, flags);
672 if (rc)
673 return rc;
674
675 rc = pn533_submit_urb_for_ack(dev, flags);
676 if (rc)
677 goto error;
678
679 return 0;
680
681 error:
682 usb_unlink_urb(dev->out_urb);
683 return rc;
684 }
685
686 static void pn533_wq_cmd(struct work_struct *work)
687 {
688 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
689 struct pn533_cmd *cmd;
690
691 mutex_lock(&dev->cmd_lock);
692
693 if (list_empty(&dev->cmd_queue)) {
694 dev->cmd_pending = 0;
695 mutex_unlock(&dev->cmd_lock);
696 return;
697 }
698
699 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
700
701 list_del(&cmd->queue);
702
703 mutex_unlock(&dev->cmd_lock);
704
705 __pn533_send_cmd_frame_async(dev, cmd->out_frame, cmd->in_frame,
706 cmd->in_frame_len, cmd->cmd_complete,
707 cmd->arg, cmd->flags);
708
709 kfree(cmd);
710 }
711
712 static int pn533_send_cmd_frame_async(struct pn533 *dev,
713 struct pn533_frame *out_frame,
714 struct pn533_frame *in_frame,
715 int in_frame_len,
716 pn533_cmd_complete_t cmd_complete,
717 void *arg, gfp_t flags)
718 {
719 struct pn533_cmd *cmd;
720 int rc = 0;
721
722 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
723
724 mutex_lock(&dev->cmd_lock);
725
726 if (!dev->cmd_pending) {
727 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
728 in_frame_len, cmd_complete,
729 arg, flags);
730 if (!rc)
731 dev->cmd_pending = 1;
732
733 goto unlock;
734 }
735
736 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
737
738 cmd = kzalloc(sizeof(struct pn533_cmd), flags);
739 if (!cmd) {
740 rc = -ENOMEM;
741 goto unlock;
742 }
743
744 INIT_LIST_HEAD(&cmd->queue);
745 cmd->out_frame = out_frame;
746 cmd->in_frame = in_frame;
747 cmd->in_frame_len = in_frame_len;
748 cmd->cmd_complete = cmd_complete;
749 cmd->arg = arg;
750 cmd->flags = flags;
751
752 list_add_tail(&cmd->queue, &dev->cmd_queue);
753
754 unlock:
755 mutex_unlock(&dev->cmd_lock);
756
757 return rc;
758 }
759
760 struct pn533_sync_cmd_response {
761 int rc;
762 struct completion done;
763 };
764
765 static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
766 u8 *params, int params_len)
767 {
768 struct pn533_sync_cmd_response *arg = _arg;
769
770 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
771
772 arg->rc = 0;
773
774 if (params_len < 0) /* error */
775 arg->rc = params_len;
776
777 complete(&arg->done);
778
779 return 0;
780 }
781
782 static int pn533_send_cmd_frame_sync(struct pn533 *dev,
783 struct pn533_frame *out_frame,
784 struct pn533_frame *in_frame,
785 int in_frame_len)
786 {
787 int rc;
788 struct pn533_sync_cmd_response arg;
789
790 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
791
792 init_completion(&arg.done);
793
794 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
795 pn533_sync_cmd_complete, &arg, GFP_KERNEL);
796 if (rc)
797 return rc;
798
799 wait_for_completion(&arg.done);
800
801 return arg.rc;
802 }
803
804 static void pn533_send_complete(struct urb *urb)
805 {
806 struct pn533 *dev = urb->context;
807
808 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
809
810 switch (urb->status) {
811 case 0:
812 /* success */
813 break;
814 case -ECONNRESET:
815 case -ENOENT:
816 case -ESHUTDOWN:
817 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
818 " status: %d", urb->status);
819 break;
820 default:
821 nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
822 " %d", urb->status);
823 }
824 }
825
826 struct pn533_target_type_a {
827 __be16 sens_res;
828 u8 sel_res;
829 u8 nfcid_len;
830 u8 nfcid_data[];
831 } __packed;
832
833
834 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
835 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
836 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
837
838 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
839 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
840
841 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
842 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
843
844 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
845 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
846 #define PN533_TYPE_A_SEL_PROT_DEP 2
847 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
848
849 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
850 int target_data_len)
851 {
852 u8 ssd;
853 u8 platconf;
854
855 if (target_data_len < sizeof(struct pn533_target_type_a))
856 return false;
857
858 /* The lenght check of nfcid[] and ats[] are not being performed because
859 the values are not being used */
860
861 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
862 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
863 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
864
865 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
866 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
867 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
868 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
869 return false;
870
871 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
872 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
873 return false;
874
875 return true;
876 }
877
878 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
879 int tgt_data_len)
880 {
881 struct pn533_target_type_a *tgt_type_a;
882
883 tgt_type_a = (struct pn533_target_type_a *) tgt_data;
884
885 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
886 return -EPROTO;
887
888 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
889 case PN533_TYPE_A_SEL_PROT_MIFARE:
890 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
891 break;
892 case PN533_TYPE_A_SEL_PROT_ISO14443:
893 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
894 break;
895 case PN533_TYPE_A_SEL_PROT_DEP:
896 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
897 break;
898 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
899 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
900 NFC_PROTO_NFC_DEP_MASK;
901 break;
902 }
903
904 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
905 nfc_tgt->sel_res = tgt_type_a->sel_res;
906 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
907 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
908
909 return 0;
910 }
911
912 struct pn533_target_felica {
913 u8 pol_res;
914 u8 opcode;
915 u8 nfcid2[8];
916 u8 pad[8];
917 /* optional */
918 u8 syst_code[];
919 } __packed;
920
921 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
922 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
923
924 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
925 int target_data_len)
926 {
927 if (target_data_len < sizeof(struct pn533_target_felica))
928 return false;
929
930 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
931 return false;
932
933 return true;
934 }
935
936 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
937 int tgt_data_len)
938 {
939 struct pn533_target_felica *tgt_felica;
940
941 tgt_felica = (struct pn533_target_felica *) tgt_data;
942
943 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
944 return -EPROTO;
945
946 if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
947 tgt_felica->nfcid2[1] ==
948 PN533_FELICA_SENSF_NFCID2_DEP_B2)
949 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
950 else
951 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
952
953 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
954 nfc_tgt->sensf_res_len = 9;
955
956 return 0;
957 }
958
959 struct pn533_target_jewel {
960 __be16 sens_res;
961 u8 jewelid[4];
962 } __packed;
963
964 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
965 int target_data_len)
966 {
967 u8 ssd;
968 u8 platconf;
969
970 if (target_data_len < sizeof(struct pn533_target_jewel))
971 return false;
972
973 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
974 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
975 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
976
977 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
978 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
979 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
980 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
981 return false;
982
983 return true;
984 }
985
986 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
987 int tgt_data_len)
988 {
989 struct pn533_target_jewel *tgt_jewel;
990
991 tgt_jewel = (struct pn533_target_jewel *) tgt_data;
992
993 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
994 return -EPROTO;
995
996 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
997 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
998 nfc_tgt->nfcid1_len = 4;
999 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1000
1001 return 0;
1002 }
1003
1004 struct pn533_type_b_prot_info {
1005 u8 bitrate;
1006 u8 fsci_type;
1007 u8 fwi_adc_fo;
1008 } __packed;
1009
1010 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1011 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1012 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1013
1014 struct pn533_type_b_sens_res {
1015 u8 opcode;
1016 u8 nfcid[4];
1017 u8 appdata[4];
1018 struct pn533_type_b_prot_info prot_info;
1019 } __packed;
1020
1021 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1022
1023 struct pn533_target_type_b {
1024 struct pn533_type_b_sens_res sensb_res;
1025 u8 attrib_res_len;
1026 u8 attrib_res[];
1027 } __packed;
1028
1029 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1030 int target_data_len)
1031 {
1032 if (target_data_len < sizeof(struct pn533_target_type_b))
1033 return false;
1034
1035 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1036 return false;
1037
1038 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1039 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1040 return false;
1041
1042 return true;
1043 }
1044
1045 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1046 int tgt_data_len)
1047 {
1048 struct pn533_target_type_b *tgt_type_b;
1049
1050 tgt_type_b = (struct pn533_target_type_b *) tgt_data;
1051
1052 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1053 return -EPROTO;
1054
1055 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1056
1057 return 0;
1058 }
1059
1060 struct pn533_poll_response {
1061 u8 nbtg;
1062 u8 tg;
1063 u8 target_data[];
1064 } __packed;
1065
1066 static int pn533_target_found(struct pn533 *dev,
1067 struct pn533_poll_response *resp, int resp_len)
1068 {
1069 int target_data_len;
1070 struct nfc_target nfc_tgt;
1071 int rc;
1072
1073 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1074 dev->poll_mod_curr);
1075
1076 if (resp->tg != 1)
1077 return -EPROTO;
1078
1079 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1080
1081 target_data_len = resp_len - sizeof(struct pn533_poll_response);
1082
1083 switch (dev->poll_mod_curr) {
1084 case PN533_POLL_MOD_106KBPS_A:
1085 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
1086 target_data_len);
1087 break;
1088 case PN533_POLL_MOD_212KBPS_FELICA:
1089 case PN533_POLL_MOD_424KBPS_FELICA:
1090 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
1091 target_data_len);
1092 break;
1093 case PN533_POLL_MOD_106KBPS_JEWEL:
1094 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
1095 target_data_len);
1096 break;
1097 case PN533_POLL_MOD_847KBPS_B:
1098 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
1099 target_data_len);
1100 break;
1101 default:
1102 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
1103 " modulation");
1104 return -EPROTO;
1105 }
1106
1107 if (rc)
1108 return rc;
1109
1110 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1111 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
1112 " have the desired protocol");
1113 return -EAGAIN;
1114 }
1115
1116 nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
1117 "0x%x", nfc_tgt.supported_protocols);
1118
1119 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1120
1121 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1122
1123 return 0;
1124 }
1125
1126 static inline void pn533_poll_next_mod(struct pn533 *dev)
1127 {
1128 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1129 }
1130
1131 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1132 {
1133 dev->poll_mod_count = 0;
1134 }
1135
1136 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1137 {
1138 dev->poll_mod_active[dev->poll_mod_count] =
1139 (struct pn533_poll_modulations *) &poll_mod[mod_index];
1140 dev->poll_mod_count++;
1141 }
1142
1143 static void pn533_poll_create_mod_list(struct pn533 *dev,
1144 u32 im_protocols, u32 tm_protocols)
1145 {
1146 pn533_poll_reset_mod_list(dev);
1147
1148 if (im_protocols & NFC_PROTO_MIFARE_MASK
1149 || im_protocols & NFC_PROTO_ISO14443_MASK
1150 || im_protocols & NFC_PROTO_NFC_DEP_MASK)
1151 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1152
1153 if (im_protocols & NFC_PROTO_FELICA_MASK
1154 || im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1155 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1156 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1157 }
1158
1159 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1160 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1161
1162 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1163 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1164
1165 if (tm_protocols)
1166 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1167 }
1168
1169 static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
1170 u8 *params, int params_len)
1171 {
1172 struct pn533_poll_response *resp;
1173 int rc;
1174
1175 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1176
1177 resp = (struct pn533_poll_response *) params;
1178 if (resp->nbtg) {
1179 rc = pn533_target_found(dev, resp, params_len);
1180
1181 /* We must stop the poll after a valid target found */
1182 if (rc == 0) {
1183 pn533_poll_reset_mod_list(dev);
1184 return 0;
1185 }
1186 }
1187
1188 return -EAGAIN;
1189 }
1190
1191 static int pn533_init_target_frame(struct pn533_frame *frame,
1192 u8 *gb, size_t gb_len)
1193 {
1194 struct pn533_cmd_init_target *cmd;
1195 size_t cmd_len;
1196 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1197 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1198 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1199 0xff, 0xff}; /* System code */
1200 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1201 0x0, 0x0, 0x0,
1202 0x40}; /* SEL_RES for DEP */
1203
1204 cmd_len = sizeof(struct pn533_cmd_init_target) + gb_len + 1;
1205 cmd = kzalloc(cmd_len, GFP_KERNEL);
1206 if (cmd == NULL)
1207 return -ENOMEM;
1208
1209 pn533_tx_frame_init(frame, PN533_CMD_TG_INIT_AS_TARGET);
1210
1211 /* DEP support only */
1212 cmd->mode |= PN533_INIT_TARGET_DEP;
1213
1214 /* Felica params */
1215 memcpy(cmd->felica, felica_params, 18);
1216 get_random_bytes(cmd->felica + 2, 6);
1217
1218 /* NFCID3 */
1219 memset(cmd->nfcid3, 0, 10);
1220 memcpy(cmd->nfcid3, cmd->felica, 8);
1221
1222 /* MIFARE params */
1223 memcpy(cmd->mifare, mifare_params, 6);
1224
1225 /* General bytes */
1226 cmd->gb_len = gb_len;
1227 memcpy(cmd->gb, gb, gb_len);
1228
1229 /* Len Tk */
1230 cmd->gb[gb_len] = 0;
1231
1232 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), cmd, cmd_len);
1233
1234 frame->datalen += cmd_len;
1235
1236 pn533_tx_frame_finish(frame);
1237
1238 kfree(cmd);
1239
1240 return 0;
1241 }
1242
1243 #define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1244 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1245 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1246 u8 *params, int params_len)
1247 {
1248 struct sk_buff *skb_resp = arg;
1249 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1250
1251 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1252
1253 if (params_len < 0) {
1254 nfc_dev_err(&dev->interface->dev,
1255 "Error %d when starting as a target",
1256 params_len);
1257
1258 return params_len;
1259 }
1260
1261 if (params_len > 0 && params[0] != 0) {
1262 nfc_tm_deactivated(dev->nfc_dev);
1263
1264 dev->tgt_mode = 0;
1265
1266 kfree_skb(skb_resp);
1267 return 0;
1268 }
1269
1270 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1271 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1272 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1273
1274 return nfc_tm_data_received(dev->nfc_dev, skb_resp);
1275 }
1276
1277 static void pn533_wq_tg_get_data(struct work_struct *work)
1278 {
1279 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1280 struct pn533_frame *in_frame;
1281 struct sk_buff *skb_resp;
1282 size_t skb_resp_len;
1283
1284 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1285
1286 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1287 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1288 PN533_FRAME_TAIL_SIZE;
1289
1290 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
1291 if (!skb_resp)
1292 return;
1293
1294 in_frame = (struct pn533_frame *)skb_resp->data;
1295
1296 pn533_tx_frame_init(dev->out_frame, PN533_CMD_TG_GET_DATA);
1297 pn533_tx_frame_finish(dev->out_frame);
1298
1299 pn533_send_cmd_frame_async(dev, dev->out_frame, in_frame,
1300 skb_resp_len,
1301 pn533_tm_get_data_complete,
1302 skb_resp, GFP_KERNEL);
1303
1304 return;
1305 }
1306
1307 #define ATR_REQ_GB_OFFSET 17
1308 static int pn533_init_target_complete(struct pn533 *dev, void *arg,
1309 u8 *params, int params_len)
1310 {
1311 struct pn533_cmd_init_target_response *resp;
1312 u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb;
1313 size_t gb_len;
1314 int rc;
1315
1316 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1317
1318 if (params_len < 0) {
1319 nfc_dev_err(&dev->interface->dev,
1320 "Error %d when starting as a target",
1321 params_len);
1322
1323 return params_len;
1324 }
1325
1326 if (params_len < ATR_REQ_GB_OFFSET + 1)
1327 return -EINVAL;
1328
1329 resp = (struct pn533_cmd_init_target_response *) params;
1330
1331 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n",
1332 resp->mode, params_len);
1333
1334 frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK;
1335 if (frame == PN533_INIT_TARGET_RESP_ACTIVE)
1336 comm_mode = NFC_COMM_ACTIVE;
1337
1338 /* Again, only DEP */
1339 if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0)
1340 return -EOPNOTSUPP;
1341
1342 gb = resp->cmd + ATR_REQ_GB_OFFSET;
1343 gb_len = params_len - (ATR_REQ_GB_OFFSET + 1);
1344
1345 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1346 comm_mode, gb, gb_len);
1347 if (rc < 0) {
1348 nfc_dev_err(&dev->interface->dev,
1349 "Error when signaling target activation");
1350 return rc;
1351 }
1352
1353 dev->tgt_mode = 1;
1354
1355 queue_work(dev->wq, &dev->tg_work);
1356
1357 return 0;
1358 }
1359
1360 static void pn533_listen_mode_timer(unsigned long data)
1361 {
1362 struct pn533 *dev = (struct pn533 *) data;
1363
1364 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1365
1366 /* An ack will cancel the last issued command (poll) */
1367 pn533_send_ack(dev, GFP_ATOMIC);
1368
1369 dev->cancel_listen = 1;
1370
1371 pn533_poll_next_mod(dev);
1372
1373 queue_work(dev->wq, &dev->poll_work);
1374 }
1375
1376 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1377 u8 *params, int params_len)
1378 {
1379 struct pn533_poll_modulations *cur_mod;
1380 int rc;
1381
1382 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1383
1384 if (params_len == -ENOENT) {
1385 if (dev->poll_mod_count != 0)
1386 return 0;
1387
1388 nfc_dev_err(&dev->interface->dev,
1389 "Polling operation has been stopped");
1390
1391 goto stop_poll;
1392 }
1393
1394 if (params_len < 0) {
1395 nfc_dev_err(&dev->interface->dev,
1396 "Error %d when running poll", params_len);
1397
1398 goto stop_poll;
1399 }
1400
1401 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1402
1403 if (cur_mod->len == 0) {
1404 del_timer(&dev->listen_timer);
1405
1406 return pn533_init_target_complete(dev, arg, params, params_len);
1407 } else {
1408 rc = pn533_start_poll_complete(dev, arg, params, params_len);
1409 if (!rc)
1410 return rc;
1411 }
1412
1413 pn533_poll_next_mod(dev);
1414
1415 queue_work(dev->wq, &dev->poll_work);
1416
1417 return 0;
1418
1419 stop_poll:
1420 pn533_poll_reset_mod_list(dev);
1421 dev->poll_protocols = 0;
1422 return 0;
1423 }
1424
1425 static void pn533_build_poll_frame(struct pn533 *dev,
1426 struct pn533_frame *frame,
1427 struct pn533_poll_modulations *mod)
1428 {
1429 nfc_dev_dbg(&dev->interface->dev, "mod len %d\n", mod->len);
1430
1431 if (mod->len == 0) {
1432 /* Listen mode */
1433 pn533_init_target_frame(frame, dev->gb, dev->gb_len);
1434 } else {
1435 /* Polling mode */
1436 pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
1437
1438 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1439 frame->datalen += mod->len;
1440
1441 pn533_tx_frame_finish(frame);
1442 }
1443 }
1444
1445 static int pn533_send_poll_frame(struct pn533 *dev)
1446 {
1447 struct pn533_poll_modulations *cur_mod;
1448 int rc;
1449
1450 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1451
1452 pn533_build_poll_frame(dev, dev->out_frame, cur_mod);
1453
1454 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1455 dev->in_maxlen, pn533_poll_complete,
1456 NULL, GFP_KERNEL);
1457 if (rc)
1458 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1459
1460 return rc;
1461 }
1462
1463 static void pn533_wq_poll(struct work_struct *work)
1464 {
1465 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1466 struct pn533_poll_modulations *cur_mod;
1467 int rc;
1468
1469 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1470
1471 nfc_dev_dbg(&dev->interface->dev,
1472 "%s cancel_listen %d modulation len %d",
1473 __func__, dev->cancel_listen, cur_mod->len);
1474
1475 if (dev->cancel_listen == 1) {
1476 dev->cancel_listen = 0;
1477 usb_kill_urb(dev->in_urb);
1478 }
1479
1480 rc = pn533_send_poll_frame(dev);
1481 if (rc)
1482 return;
1483
1484 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1485 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1486
1487 return;
1488 }
1489
1490 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1491 u32 im_protocols, u32 tm_protocols)
1492 {
1493 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1494
1495 nfc_dev_dbg(&dev->interface->dev,
1496 "%s: im protocols 0x%x tm protocols 0x%x",
1497 __func__, im_protocols, tm_protocols);
1498
1499 if (dev->tgt_active_prot) {
1500 nfc_dev_err(&dev->interface->dev,
1501 "Cannot poll with a target already activated");
1502 return -EBUSY;
1503 }
1504
1505 if (dev->tgt_mode) {
1506 nfc_dev_err(&dev->interface->dev,
1507 "Cannot poll while already being activated");
1508 return -EBUSY;
1509 }
1510
1511 if (tm_protocols) {
1512 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1513 if (dev->gb == NULL)
1514 tm_protocols = 0;
1515 }
1516
1517 dev->poll_mod_curr = 0;
1518 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1519 dev->poll_protocols = im_protocols;
1520 dev->listen_protocols = tm_protocols;
1521
1522 return pn533_send_poll_frame(dev);
1523 }
1524
1525 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1526 {
1527 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1528
1529 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1530
1531 del_timer(&dev->listen_timer);
1532
1533 if (!dev->poll_mod_count) {
1534 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1535 " running");
1536 return;
1537 }
1538
1539 /* An ack will cancel the last issued command (poll) */
1540 pn533_send_ack(dev, GFP_KERNEL);
1541
1542 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1543 usb_kill_urb(dev->in_urb);
1544
1545 pn533_poll_reset_mod_list(dev);
1546 }
1547
1548 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1549 {
1550 struct pn533_cmd_activate_param param;
1551 struct pn533_cmd_activate_response *resp;
1552 u16 gt_len;
1553 int rc;
1554
1555 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1556
1557 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1558
1559 param.tg = 1;
1560 param.next = 0;
1561 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1562 sizeof(struct pn533_cmd_activate_param));
1563 dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1564
1565 pn533_tx_frame_finish(dev->out_frame);
1566
1567 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1568 dev->in_maxlen);
1569 if (rc)
1570 return rc;
1571
1572 resp = (struct pn533_cmd_activate_response *)
1573 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1574 rc = resp->status & PN533_CMD_RET_MASK;
1575 if (rc != PN533_CMD_RET_SUCCESS)
1576 return -EIO;
1577
1578 /* ATR_RES general bytes are located at offset 16 */
1579 gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1580 rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1581
1582 return rc;
1583 }
1584
1585 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1586 struct nfc_target *target, u32 protocol)
1587 {
1588 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1589 int rc;
1590
1591 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1592 protocol);
1593
1594 if (dev->poll_mod_count) {
1595 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1596 " polling");
1597 return -EBUSY;
1598 }
1599
1600 if (dev->tgt_active_prot) {
1601 nfc_dev_err(&dev->interface->dev, "There is already an active"
1602 " target");
1603 return -EBUSY;
1604 }
1605
1606 if (!dev->tgt_available_prots) {
1607 nfc_dev_err(&dev->interface->dev, "There is no available target"
1608 " to activate");
1609 return -EINVAL;
1610 }
1611
1612 if (!(dev->tgt_available_prots & (1 << protocol))) {
1613 nfc_dev_err(&dev->interface->dev, "The target does not support"
1614 " the requested protocol %u", protocol);
1615 return -EINVAL;
1616 }
1617
1618 if (protocol == NFC_PROTO_NFC_DEP) {
1619 rc = pn533_activate_target_nfcdep(dev);
1620 if (rc) {
1621 nfc_dev_err(&dev->interface->dev, "Error %d when"
1622 " activating target with"
1623 " NFC_DEP protocol", rc);
1624 return rc;
1625 }
1626 }
1627
1628 dev->tgt_active_prot = protocol;
1629 dev->tgt_available_prots = 0;
1630
1631 return 0;
1632 }
1633
1634 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1635 struct nfc_target *target)
1636 {
1637 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1638 u8 tg;
1639 u8 status;
1640 int rc;
1641
1642 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1643
1644 if (!dev->tgt_active_prot) {
1645 nfc_dev_err(&dev->interface->dev, "There is no active target");
1646 return;
1647 }
1648
1649 dev->tgt_active_prot = 0;
1650
1651 skb_queue_purge(&dev->resp_q);
1652
1653 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1654
1655 tg = 1;
1656 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1657 dev->out_frame->datalen += sizeof(u8);
1658
1659 pn533_tx_frame_finish(dev->out_frame);
1660
1661 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1662 dev->in_maxlen);
1663 if (rc) {
1664 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1665 " command to the controller");
1666 return;
1667 }
1668
1669 status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1670 rc = status & PN533_CMD_RET_MASK;
1671 if (rc != PN533_CMD_RET_SUCCESS)
1672 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1673 " the target", rc);
1674
1675 return;
1676 }
1677
1678
1679 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1680 u8 *params, int params_len)
1681 {
1682 struct pn533_cmd_jump_dep_response *resp;
1683 struct nfc_target nfc_target;
1684 u8 target_gt_len;
1685 int rc;
1686 struct pn533_cmd_jump_dep *cmd = (struct pn533_cmd_jump_dep *)arg;
1687 u8 active = cmd->active;
1688
1689 kfree(arg);
1690
1691 if (params_len == -ENOENT) {
1692 nfc_dev_dbg(&dev->interface->dev, "");
1693 return 0;
1694 }
1695
1696 if (params_len < 0) {
1697 nfc_dev_err(&dev->interface->dev,
1698 "Error %d when bringing DEP link up",
1699 params_len);
1700 return 0;
1701 }
1702
1703 if (dev->tgt_available_prots &&
1704 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1705 nfc_dev_err(&dev->interface->dev,
1706 "The target does not support DEP");
1707 return -EINVAL;
1708 }
1709
1710 resp = (struct pn533_cmd_jump_dep_response *) params;
1711 rc = resp->status & PN533_CMD_RET_MASK;
1712 if (rc != PN533_CMD_RET_SUCCESS) {
1713 nfc_dev_err(&dev->interface->dev,
1714 "Bringing DEP link up failed %d", rc);
1715 return 0;
1716 }
1717
1718 if (!dev->tgt_available_prots) {
1719 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1720
1721 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1722 nfc_target.nfcid1_len = 10;
1723 memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
1724 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1725 if (rc)
1726 return 0;
1727
1728 dev->tgt_available_prots = 0;
1729 }
1730
1731 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1732
1733 /* ATR_RES general bytes are located at offset 17 */
1734 target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1735 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1736 resp->gt, target_gt_len);
1737 if (rc == 0)
1738 rc = nfc_dep_link_is_up(dev->nfc_dev,
1739 dev->nfc_dev->targets[0].idx,
1740 !active, NFC_RF_INITIATOR);
1741
1742 return 0;
1743 }
1744
1745 static int pn533_mod_to_baud(struct pn533 *dev)
1746 {
1747 switch (dev->poll_mod_curr) {
1748 case PN533_POLL_MOD_106KBPS_A:
1749 return 0;
1750 case PN533_POLL_MOD_212KBPS_FELICA:
1751 return 1;
1752 case PN533_POLL_MOD_424KBPS_FELICA:
1753 return 2;
1754 default:
1755 return -EINVAL;
1756 }
1757 }
1758
1759 #define PASSIVE_DATA_LEN 5
1760 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1761 u8 comm_mode, u8* gb, size_t gb_len)
1762 {
1763 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1764 struct pn533_cmd_jump_dep *cmd;
1765 u8 cmd_len, *data_ptr;
1766 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1767 int rc, baud;
1768
1769 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1770
1771 if (dev->poll_mod_count) {
1772 nfc_dev_err(&dev->interface->dev,
1773 "Cannot bring the DEP link up while polling");
1774 return -EBUSY;
1775 }
1776
1777 if (dev->tgt_active_prot) {
1778 nfc_dev_err(&dev->interface->dev,
1779 "There is already an active target");
1780 return -EBUSY;
1781 }
1782
1783 baud = pn533_mod_to_baud(dev);
1784 if (baud < 0) {
1785 nfc_dev_err(&dev->interface->dev,
1786 "Invalid curr modulation %d", dev->poll_mod_curr);
1787 return baud;
1788 }
1789
1790 cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
1791 if (comm_mode == NFC_COMM_PASSIVE)
1792 cmd_len += PASSIVE_DATA_LEN;
1793
1794 cmd = kzalloc(cmd_len, GFP_KERNEL);
1795 if (cmd == NULL)
1796 return -ENOMEM;
1797
1798 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1799
1800 cmd->active = !comm_mode;
1801 cmd->next = 0;
1802 cmd->baud = baud;
1803 data_ptr = cmd->data;
1804 if (comm_mode == NFC_COMM_PASSIVE && cmd->baud > 0) {
1805 memcpy(data_ptr, passive_data, PASSIVE_DATA_LEN);
1806 cmd->next |= 1;
1807 data_ptr += PASSIVE_DATA_LEN;
1808 }
1809
1810 if (gb != NULL && gb_len > 0) {
1811 cmd->next |= 4; /* We have some Gi */
1812 memcpy(data_ptr, gb, gb_len);
1813 } else {
1814 cmd->next = 0;
1815 }
1816
1817 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1818 dev->out_frame->datalen += cmd_len;
1819
1820 pn533_tx_frame_finish(dev->out_frame);
1821
1822 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1823 dev->in_maxlen, pn533_in_dep_link_up_complete,
1824 cmd, GFP_KERNEL);
1825 if (rc < 0)
1826 kfree(cmd);
1827
1828 return rc;
1829 }
1830
1831 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1832 {
1833 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1834
1835 pn533_poll_reset_mod_list(dev);
1836
1837 if (dev->tgt_mode || dev->tgt_active_prot) {
1838 pn533_send_ack(dev, GFP_KERNEL);
1839 usb_kill_urb(dev->in_urb);
1840 }
1841
1842 dev->tgt_active_prot = 0;
1843 dev->tgt_mode = 0;
1844
1845 skb_queue_purge(&dev->resp_q);
1846
1847 return 0;
1848 }
1849
1850 static int pn533_build_tx_frame(struct pn533 *dev, struct sk_buff *skb,
1851 bool target)
1852 {
1853 int payload_len = skb->len;
1854 struct pn533_frame *out_frame;
1855 u8 tg;
1856
1857 nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
1858 payload_len);
1859
1860 if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
1861 /* TODO: Implement support to multi-part data exchange */
1862 nfc_dev_err(&dev->interface->dev, "Data length greater than the"
1863 " max allowed: %d",
1864 PN533_CMD_DATAEXCH_DATA_MAXLEN);
1865 return -ENOSYS;
1866 }
1867
1868 if (target == true) {
1869 switch (dev->device_type) {
1870 case PN533_DEVICE_PASORI:
1871 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
1872 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN - 1);
1873 out_frame = (struct pn533_frame *) skb->data;
1874 pn533_tx_frame_init(out_frame,
1875 PN533_CMD_IN_COMM_THRU);
1876
1877 break;
1878 }
1879
1880 default:
1881 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
1882 out_frame = (struct pn533_frame *) skb->data;
1883 pn533_tx_frame_init(out_frame,
1884 PN533_CMD_IN_DATA_EXCHANGE);
1885 tg = 1;
1886 memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame),
1887 &tg, sizeof(u8));
1888 out_frame->datalen += sizeof(u8);
1889
1890 break;
1891 }
1892
1893 } else {
1894 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN - 1);
1895 out_frame = (struct pn533_frame *) skb->data;
1896 pn533_tx_frame_init(out_frame, PN533_CMD_TG_SET_DATA);
1897 }
1898
1899
1900 /* The data is already in the out_frame, just update the datalen */
1901 out_frame->datalen += payload_len;
1902
1903 pn533_tx_frame_finish(out_frame);
1904 skb_put(skb, PN533_FRAME_TAIL_SIZE);
1905
1906 return 0;
1907 }
1908
1909 struct pn533_data_exchange_arg {
1910 struct sk_buff *skb_resp;
1911 struct sk_buff *skb_out;
1912 data_exchange_cb_t cb;
1913 void *cb_context;
1914 };
1915
1916 static struct sk_buff *pn533_build_response(struct pn533 *dev)
1917 {
1918 struct sk_buff *skb, *tmp, *t;
1919 unsigned int skb_len = 0, tmp_len = 0;
1920
1921 nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
1922
1923 if (skb_queue_empty(&dev->resp_q))
1924 return NULL;
1925
1926 if (skb_queue_len(&dev->resp_q) == 1) {
1927 skb = skb_dequeue(&dev->resp_q);
1928 goto out;
1929 }
1930
1931 skb_queue_walk_safe(&dev->resp_q, tmp, t)
1932 skb_len += tmp->len;
1933
1934 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
1935 __func__, skb_len);
1936
1937 skb = alloc_skb(skb_len, GFP_KERNEL);
1938 if (skb == NULL)
1939 goto out;
1940
1941 skb_put(skb, skb_len);
1942
1943 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1944 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1945 tmp_len += tmp->len;
1946 }
1947
1948 out:
1949 skb_queue_purge(&dev->resp_q);
1950
1951 return skb;
1952 }
1953
1954 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1955 u8 *params, int params_len)
1956 {
1957 struct pn533_data_exchange_arg *arg = _arg;
1958 struct sk_buff *skb = NULL, *skb_resp = arg->skb_resp;
1959 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1960 int err = 0;
1961 u8 status;
1962 u8 cmd_ret;
1963
1964 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1965
1966 dev_kfree_skb(arg->skb_out);
1967
1968 if (params_len < 0) { /* error */
1969 err = params_len;
1970 goto error;
1971 }
1972
1973 status = params[0];
1974
1975 cmd_ret = status & PN533_CMD_RET_MASK;
1976 if (cmd_ret != PN533_CMD_RET_SUCCESS) {
1977 nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
1978 " exchanging data", cmd_ret);
1979 err = -EIO;
1980 goto error;
1981 }
1982
1983 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1984 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1985 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1986 skb_queue_tail(&dev->resp_q, skb_resp);
1987
1988 if (status & PN533_CMD_MI_MASK) {
1989 queue_work(dev->wq, &dev->mi_work);
1990 return -EINPROGRESS;
1991 }
1992
1993 skb = pn533_build_response(dev);
1994 if (skb == NULL)
1995 goto error;
1996
1997 arg->cb(arg->cb_context, skb, 0);
1998 kfree(arg);
1999 return 0;
2000
2001 error:
2002 skb_queue_purge(&dev->resp_q);
2003 dev_kfree_skb(skb_resp);
2004 arg->cb(arg->cb_context, NULL, err);
2005 kfree(arg);
2006 return 0;
2007 }
2008
2009 static int pn533_transceive(struct nfc_dev *nfc_dev,
2010 struct nfc_target *target, struct sk_buff *skb,
2011 data_exchange_cb_t cb, void *cb_context)
2012 {
2013 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2014 struct pn533_frame *out_frame, *in_frame;
2015 struct pn533_data_exchange_arg *arg;
2016 struct sk_buff *skb_resp;
2017 int skb_resp_len;
2018 int rc;
2019
2020 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2021
2022 if (!dev->tgt_active_prot) {
2023 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
2024 " there is no active target");
2025 rc = -EINVAL;
2026 goto error;
2027 }
2028
2029 rc = pn533_build_tx_frame(dev, skb, true);
2030 if (rc)
2031 goto error;
2032
2033 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
2034 PN533_CMD_DATAEXCH_DATA_MAXLEN +
2035 PN533_FRAME_TAIL_SIZE;
2036
2037 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
2038 if (!skb_resp) {
2039 rc = -ENOMEM;
2040 goto error;
2041 }
2042
2043 in_frame = (struct pn533_frame *) skb_resp->data;
2044 out_frame = (struct pn533_frame *) skb->data;
2045
2046 arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
2047 if (!arg) {
2048 rc = -ENOMEM;
2049 goto free_skb_resp;
2050 }
2051
2052 arg->skb_resp = skb_resp;
2053 arg->skb_out = skb;
2054 arg->cb = cb;
2055 arg->cb_context = cb_context;
2056
2057 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
2058 pn533_data_exchange_complete, arg,
2059 GFP_KERNEL);
2060 if (rc) {
2061 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
2062 " perform data_exchange", rc);
2063 goto free_arg;
2064 }
2065
2066 return 0;
2067
2068 free_arg:
2069 kfree(arg);
2070 free_skb_resp:
2071 kfree_skb(skb_resp);
2072 error:
2073 kfree_skb(skb);
2074 return rc;
2075 }
2076
2077 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2078 u8 *params, int params_len)
2079 {
2080 struct sk_buff *skb_out = arg;
2081
2082 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2083
2084 dev_kfree_skb(skb_out);
2085
2086 if (params_len < 0) {
2087 nfc_dev_err(&dev->interface->dev,
2088 "Error %d when sending data",
2089 params_len);
2090
2091 return params_len;
2092 }
2093
2094 if (params_len > 0 && params[0] != 0) {
2095 nfc_tm_deactivated(dev->nfc_dev);
2096
2097 dev->tgt_mode = 0;
2098
2099 return 0;
2100 }
2101
2102 queue_work(dev->wq, &dev->tg_work);
2103
2104 return 0;
2105 }
2106
2107 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2108 {
2109 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2110 struct pn533_frame *out_frame;
2111 int rc;
2112
2113 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2114
2115 rc = pn533_build_tx_frame(dev, skb, false);
2116 if (rc)
2117 goto error;
2118
2119 out_frame = (struct pn533_frame *) skb->data;
2120
2121 rc = pn533_send_cmd_frame_async(dev, out_frame, dev->in_frame,
2122 dev->in_maxlen, pn533_tm_send_complete,
2123 skb, GFP_KERNEL);
2124 if (rc) {
2125 nfc_dev_err(&dev->interface->dev,
2126 "Error %d when trying to send data", rc);
2127 goto error;
2128 }
2129
2130 return 0;
2131
2132 error:
2133 kfree_skb(skb);
2134
2135 return rc;
2136 }
2137
2138 static void pn533_wq_mi_recv(struct work_struct *work)
2139 {
2140 struct pn533 *dev = container_of(work, struct pn533, mi_work);
2141 struct sk_buff *skb_cmd;
2142 struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg;
2143 struct pn533_frame *out_frame, *in_frame;
2144 struct sk_buff *skb_resp;
2145 int skb_resp_len;
2146 int rc;
2147
2148 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2149
2150 /* This is a zero payload size skb */
2151 skb_cmd = alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN + PN533_FRAME_TAIL_SIZE,
2152 GFP_KERNEL);
2153 if (skb_cmd == NULL)
2154 goto error_cmd;
2155
2156 skb_reserve(skb_cmd, PN533_CMD_DATAEXCH_HEAD_LEN);
2157
2158 rc = pn533_build_tx_frame(dev, skb_cmd, true);
2159 if (rc)
2160 goto error_frame;
2161
2162 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
2163 PN533_CMD_DATAEXCH_DATA_MAXLEN +
2164 PN533_FRAME_TAIL_SIZE;
2165 skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL);
2166 if (!skb_resp) {
2167 rc = -ENOMEM;
2168 goto error_frame;
2169 }
2170
2171 in_frame = (struct pn533_frame *) skb_resp->data;
2172 out_frame = (struct pn533_frame *) skb_cmd->data;
2173
2174 arg->skb_resp = skb_resp;
2175 arg->skb_out = skb_cmd;
2176
2177 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
2178 skb_resp_len,
2179 pn533_data_exchange_complete,
2180 dev->cmd_complete_arg, GFP_KERNEL);
2181 if (!rc)
2182 return;
2183
2184 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
2185 " perform data_exchange", rc);
2186
2187 kfree_skb(skb_resp);
2188
2189 error_frame:
2190 kfree_skb(skb_cmd);
2191
2192 error_cmd:
2193 pn533_send_ack(dev, GFP_KERNEL);
2194
2195 kfree(arg);
2196
2197 queue_work(dev->wq, &dev->cmd_work);
2198 }
2199
2200 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2201 u8 cfgdata_len)
2202 {
2203 int rc;
2204 u8 *params;
2205
2206 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2207
2208 pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
2209
2210 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
2211 params[0] = cfgitem;
2212 memcpy(&params[1], cfgdata, cfgdata_len);
2213 dev->out_frame->datalen += (1 + cfgdata_len);
2214
2215 pn533_tx_frame_finish(dev->out_frame);
2216
2217 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
2218 dev->in_maxlen);
2219
2220 return rc;
2221 }
2222
2223 static int pn533_fw_reset(struct pn533 *dev)
2224 {
2225 int rc;
2226 u8 *params;
2227
2228 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2229
2230 pn533_tx_frame_init(dev->out_frame, 0x18);
2231
2232 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
2233 params[0] = 0x1;
2234 dev->out_frame->datalen += 1;
2235
2236 pn533_tx_frame_finish(dev->out_frame);
2237
2238 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
2239 dev->in_maxlen);
2240
2241 return rc;
2242 }
2243
2244 static struct nfc_ops pn533_nfc_ops = {
2245 .dev_up = NULL,
2246 .dev_down = NULL,
2247 .dep_link_up = pn533_dep_link_up,
2248 .dep_link_down = pn533_dep_link_down,
2249 .start_poll = pn533_start_poll,
2250 .stop_poll = pn533_stop_poll,
2251 .activate_target = pn533_activate_target,
2252 .deactivate_target = pn533_deactivate_target,
2253 .im_transceive = pn533_transceive,
2254 .tm_send = pn533_tm_send,
2255 };
2256
2257 static int pn533_setup(struct pn533 *dev)
2258 {
2259 struct pn533_config_max_retries max_retries;
2260 struct pn533_config_timing timing;
2261 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2262 int rc;
2263
2264 switch (dev->device_type) {
2265 case PN533_DEVICE_STD:
2266 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2267 max_retries.mx_rty_psl = 2;
2268 max_retries.mx_rty_passive_act =
2269 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2270
2271 timing.rfu = PN533_CONFIG_TIMING_102;
2272 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2273 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2274
2275 break;
2276
2277 case PN533_DEVICE_PASORI:
2278 max_retries.mx_rty_atr = 0x2;
2279 max_retries.mx_rty_psl = 0x1;
2280 max_retries.mx_rty_passive_act =
2281 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2282
2283 timing.rfu = PN533_CONFIG_TIMING_102;
2284 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2285 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2286
2287 break;
2288
2289 default:
2290 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2291 dev->device_type);
2292 return -EINVAL;
2293 }
2294
2295 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2296 (u8 *)&max_retries, sizeof(max_retries));
2297 if (rc) {
2298 nfc_dev_err(&dev->interface->dev,
2299 "Error on setting MAX_RETRIES config");
2300 return rc;
2301 }
2302
2303
2304 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2305 (u8 *)&timing, sizeof(timing));
2306 if (rc) {
2307 nfc_dev_err(&dev->interface->dev,
2308 "Error on setting RF timings");
2309 return rc;
2310 }
2311
2312 switch (dev->device_type) {
2313 case PN533_DEVICE_STD:
2314 break;
2315
2316 case PN533_DEVICE_PASORI:
2317 pn533_fw_reset(dev);
2318
2319 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2320 pasori_cfg, 3);
2321 if (rc) {
2322 nfc_dev_err(&dev->interface->dev,
2323 "Error while settings PASORI config");
2324 return rc;
2325 }
2326
2327 pn533_fw_reset(dev);
2328
2329 break;
2330 }
2331
2332 return 0;
2333 }
2334
2335 static int pn533_probe(struct usb_interface *interface,
2336 const struct usb_device_id *id)
2337 {
2338 struct pn533_fw_version *fw_ver;
2339 struct pn533 *dev;
2340 struct usb_host_interface *iface_desc;
2341 struct usb_endpoint_descriptor *endpoint;
2342 int in_endpoint = 0;
2343 int out_endpoint = 0;
2344 int rc = -ENOMEM;
2345 int i;
2346 u32 protocols;
2347
2348 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2349 if (!dev)
2350 return -ENOMEM;
2351
2352 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2353 dev->interface = interface;
2354 mutex_init(&dev->cmd_lock);
2355
2356 iface_desc = interface->cur_altsetting;
2357 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2358 endpoint = &iface_desc->endpoint[i].desc;
2359
2360 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
2361 dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
2362 in_endpoint = endpoint->bEndpointAddress;
2363 }
2364
2365 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
2366 dev->out_maxlen =
2367 le16_to_cpu(endpoint->wMaxPacketSize);
2368 out_endpoint = endpoint->bEndpointAddress;
2369 }
2370 }
2371
2372 if (!in_endpoint || !out_endpoint) {
2373 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
2374 " bulk-out endpoint");
2375 rc = -ENODEV;
2376 goto error;
2377 }
2378
2379 dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
2380 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2381 dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
2382 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2383
2384 if (!dev->in_frame || !dev->out_frame ||
2385 !dev->in_urb || !dev->out_urb)
2386 goto error;
2387
2388 usb_fill_bulk_urb(dev->in_urb, dev->udev,
2389 usb_rcvbulkpipe(dev->udev, in_endpoint),
2390 NULL, 0, NULL, dev);
2391 usb_fill_bulk_urb(dev->out_urb, dev->udev,
2392 usb_sndbulkpipe(dev->udev, out_endpoint),
2393 NULL, 0,
2394 pn533_send_complete, dev);
2395
2396 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2397 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2398 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2399 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2400 INIT_WORK(&dev->poll_work, pn533_wq_poll);
2401 dev->wq = alloc_ordered_workqueue("pn533", 0);
2402 if (dev->wq == NULL)
2403 goto error;
2404
2405 init_timer(&dev->listen_timer);
2406 dev->listen_timer.data = (unsigned long) dev;
2407 dev->listen_timer.function = pn533_listen_mode_timer;
2408
2409 skb_queue_head_init(&dev->resp_q);
2410
2411 INIT_LIST_HEAD(&dev->cmd_queue);
2412
2413 usb_set_intfdata(interface, dev);
2414
2415 pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
2416 pn533_tx_frame_finish(dev->out_frame);
2417
2418 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
2419 dev->in_maxlen);
2420 if (rc)
2421 goto destroy_wq;
2422
2423 fw_ver = (struct pn533_fw_version *)
2424 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
2425 nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
2426 " attached", fw_ver->ver, fw_ver->rev);
2427
2428 dev->device_type = id->driver_info;
2429 switch (dev->device_type) {
2430 case PN533_DEVICE_STD:
2431 protocols = PN533_ALL_PROTOCOLS;
2432 break;
2433
2434 case PN533_DEVICE_PASORI:
2435 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2436 break;
2437
2438 default:
2439 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2440 dev->device_type);
2441 rc = -EINVAL;
2442 goto destroy_wq;
2443 }
2444
2445 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2446 PN533_CMD_DATAEXCH_HEAD_LEN,
2447 PN533_FRAME_TAIL_SIZE);
2448 if (!dev->nfc_dev)
2449 goto destroy_wq;
2450
2451 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2452 nfc_set_drvdata(dev->nfc_dev, dev);
2453
2454 rc = nfc_register_device(dev->nfc_dev);
2455 if (rc)
2456 goto free_nfc_dev;
2457
2458 rc = pn533_setup(dev);
2459 if (rc)
2460 goto unregister_nfc_dev;
2461
2462 return 0;
2463
2464 unregister_nfc_dev:
2465 nfc_unregister_device(dev->nfc_dev);
2466
2467 free_nfc_dev:
2468 nfc_free_device(dev->nfc_dev);
2469
2470 destroy_wq:
2471 destroy_workqueue(dev->wq);
2472 error:
2473 kfree(dev->in_frame);
2474 usb_free_urb(dev->in_urb);
2475 kfree(dev->out_frame);
2476 usb_free_urb(dev->out_urb);
2477 kfree(dev);
2478 return rc;
2479 }
2480
2481 static void pn533_disconnect(struct usb_interface *interface)
2482 {
2483 struct pn533 *dev;
2484 struct pn533_cmd *cmd, *n;
2485
2486 dev = usb_get_intfdata(interface);
2487 usb_set_intfdata(interface, NULL);
2488
2489 nfc_unregister_device(dev->nfc_dev);
2490 nfc_free_device(dev->nfc_dev);
2491
2492 usb_kill_urb(dev->in_urb);
2493 usb_kill_urb(dev->out_urb);
2494
2495 destroy_workqueue(dev->wq);
2496
2497 skb_queue_purge(&dev->resp_q);
2498
2499 del_timer(&dev->listen_timer);
2500
2501 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2502 list_del(&cmd->queue);
2503 kfree(cmd);
2504 }
2505
2506 kfree(dev->in_frame);
2507 usb_free_urb(dev->in_urb);
2508 kfree(dev->out_frame);
2509 usb_free_urb(dev->out_urb);
2510 kfree(dev);
2511
2512 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2513 }
2514
2515 static struct usb_driver pn533_driver = {
2516 .name = "pn533",
2517 .probe = pn533_probe,
2518 .disconnect = pn533_disconnect,
2519 .id_table = pn533_table,
2520 };
2521
2522 module_usb_driver(pn533_driver);
2523
2524 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
2525 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2526 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2527 MODULE_VERSION(VERSION);
2528 MODULE_LICENSE("GPL");
Linus' kernel tree