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NFC: Don't use WQ_MEM_RECLAIM for pn533
[linux-2.6/libata-dev.git] / drivers / nfc / pn533.c
blobd123444404c8629ff189fd047d9c08d9c59bb365
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 mutex_unlock(&dev->cmd_lock);
702
703 __pn533_send_cmd_frame_async(dev, cmd->out_frame, cmd->in_frame,
704 cmd->in_frame_len, cmd->cmd_complete,
705 cmd->arg, cmd->flags);
706
707 list_del(&cmd->queue);
708 kfree(cmd);
709 }
710
711 static int pn533_send_cmd_frame_async(struct pn533 *dev,
712 struct pn533_frame *out_frame,
713 struct pn533_frame *in_frame,
714 int in_frame_len,
715 pn533_cmd_complete_t cmd_complete,
716 void *arg, gfp_t flags)
717 {
718 struct pn533_cmd *cmd;
719 int rc;
720
721 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
722
723 mutex_lock(&dev->cmd_lock);
724
725 if (!dev->cmd_pending) {
726 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
727 in_frame_len, cmd_complete,
728 arg, flags);
729 if (!rc)
730 dev->cmd_pending = 1;
731
732 mutex_unlock(&dev->cmd_lock);
733
734 return rc;
735 }
736
737 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
738
739 cmd = kzalloc(sizeof(struct pn533_cmd), flags);
740 if (!cmd)
741 return -ENOMEM;
742
743 INIT_LIST_HEAD(&cmd->queue);
744 cmd->out_frame = out_frame;
745 cmd->in_frame = in_frame;
746 cmd->in_frame_len = in_frame_len;
747 cmd->cmd_complete = cmd_complete;
748 cmd->arg = arg;
749 cmd->flags = flags;
750
751 list_add_tail(&cmd->queue, &dev->cmd_queue);
752
753 mutex_unlock(&dev->cmd_lock);
754
755 return 0;
756 }
757
758 struct pn533_sync_cmd_response {
759 int rc;
760 struct completion done;
761 };
762
763 static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
764 u8 *params, int params_len)
765 {
766 struct pn533_sync_cmd_response *arg = _arg;
767
768 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
769
770 arg->rc = 0;
771
772 if (params_len < 0) /* error */
773 arg->rc = params_len;
774
775 complete(&arg->done);
776
777 return 0;
778 }
779
780 static int pn533_send_cmd_frame_sync(struct pn533 *dev,
781 struct pn533_frame *out_frame,
782 struct pn533_frame *in_frame,
783 int in_frame_len)
784 {
785 int rc;
786 struct pn533_sync_cmd_response arg;
787
788 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
789
790 init_completion(&arg.done);
791
792 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
793 pn533_sync_cmd_complete, &arg, GFP_KERNEL);
794 if (rc)
795 return rc;
796
797 wait_for_completion(&arg.done);
798
799 return arg.rc;
800 }
801
802 static void pn533_send_complete(struct urb *urb)
803 {
804 struct pn533 *dev = urb->context;
805
806 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
807
808 switch (urb->status) {
809 case 0:
810 /* success */
811 break;
812 case -ECONNRESET:
813 case -ENOENT:
814 case -ESHUTDOWN:
815 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
816 " status: %d", urb->status);
817 break;
818 default:
819 nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
820 " %d", urb->status);
821 }
822 }
823
824 struct pn533_target_type_a {
825 __be16 sens_res;
826 u8 sel_res;
827 u8 nfcid_len;
828 u8 nfcid_data[];
829 } __packed;
830
831
832 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
833 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
834 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
835
836 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
837 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
838
839 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
840 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
841
842 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
843 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
844 #define PN533_TYPE_A_SEL_PROT_DEP 2
845 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
846
847 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
848 int target_data_len)
849 {
850 u8 ssd;
851 u8 platconf;
852
853 if (target_data_len < sizeof(struct pn533_target_type_a))
854 return false;
855
856 /* The lenght check of nfcid[] and ats[] are not being performed because
857 the values are not being used */
858
859 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
860 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
861 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
862
863 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
864 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
865 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
866 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
867 return false;
868
869 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
870 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
871 return false;
872
873 return true;
874 }
875
876 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
877 int tgt_data_len)
878 {
879 struct pn533_target_type_a *tgt_type_a;
880
881 tgt_type_a = (struct pn533_target_type_a *) tgt_data;
882
883 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
884 return -EPROTO;
885
886 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
887 case PN533_TYPE_A_SEL_PROT_MIFARE:
888 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
889 break;
890 case PN533_TYPE_A_SEL_PROT_ISO14443:
891 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
892 break;
893 case PN533_TYPE_A_SEL_PROT_DEP:
894 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
895 break;
896 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
897 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
898 NFC_PROTO_NFC_DEP_MASK;
899 break;
900 }
901
902 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
903 nfc_tgt->sel_res = tgt_type_a->sel_res;
904 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
905 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
906
907 return 0;
908 }
909
910 struct pn533_target_felica {
911 u8 pol_res;
912 u8 opcode;
913 u8 nfcid2[8];
914 u8 pad[8];
915 /* optional */
916 u8 syst_code[];
917 } __packed;
918
919 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
920 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
921
922 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
923 int target_data_len)
924 {
925 if (target_data_len < sizeof(struct pn533_target_felica))
926 return false;
927
928 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
929 return false;
930
931 return true;
932 }
933
934 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
935 int tgt_data_len)
936 {
937 struct pn533_target_felica *tgt_felica;
938
939 tgt_felica = (struct pn533_target_felica *) tgt_data;
940
941 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
942 return -EPROTO;
943
944 if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
945 tgt_felica->nfcid2[1] ==
946 PN533_FELICA_SENSF_NFCID2_DEP_B2)
947 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
948 else
949 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
950
951 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
952 nfc_tgt->sensf_res_len = 9;
953
954 return 0;
955 }
956
957 struct pn533_target_jewel {
958 __be16 sens_res;
959 u8 jewelid[4];
960 } __packed;
961
962 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
963 int target_data_len)
964 {
965 u8 ssd;
966 u8 platconf;
967
968 if (target_data_len < sizeof(struct pn533_target_jewel))
969 return false;
970
971 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
972 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
973 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
974
975 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
976 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
977 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
978 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
979 return false;
980
981 return true;
982 }
983
984 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
985 int tgt_data_len)
986 {
987 struct pn533_target_jewel *tgt_jewel;
988
989 tgt_jewel = (struct pn533_target_jewel *) tgt_data;
990
991 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
992 return -EPROTO;
993
994 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
995 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
996 nfc_tgt->nfcid1_len = 4;
997 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
998
999 return 0;
1000 }
1001
1002 struct pn533_type_b_prot_info {
1003 u8 bitrate;
1004 u8 fsci_type;
1005 u8 fwi_adc_fo;
1006 } __packed;
1007
1008 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1009 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1010 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1011
1012 struct pn533_type_b_sens_res {
1013 u8 opcode;
1014 u8 nfcid[4];
1015 u8 appdata[4];
1016 struct pn533_type_b_prot_info prot_info;
1017 } __packed;
1018
1019 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1020
1021 struct pn533_target_type_b {
1022 struct pn533_type_b_sens_res sensb_res;
1023 u8 attrib_res_len;
1024 u8 attrib_res[];
1025 } __packed;
1026
1027 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1028 int target_data_len)
1029 {
1030 if (target_data_len < sizeof(struct pn533_target_type_b))
1031 return false;
1032
1033 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1034 return false;
1035
1036 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1037 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1038 return false;
1039
1040 return true;
1041 }
1042
1043 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1044 int tgt_data_len)
1045 {
1046 struct pn533_target_type_b *tgt_type_b;
1047
1048 tgt_type_b = (struct pn533_target_type_b *) tgt_data;
1049
1050 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1051 return -EPROTO;
1052
1053 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1054
1055 return 0;
1056 }
1057
1058 struct pn533_poll_response {
1059 u8 nbtg;
1060 u8 tg;
1061 u8 target_data[];
1062 } __packed;
1063
1064 static int pn533_target_found(struct pn533 *dev,
1065 struct pn533_poll_response *resp, int resp_len)
1066 {
1067 int target_data_len;
1068 struct nfc_target nfc_tgt;
1069 int rc;
1070
1071 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1072 dev->poll_mod_curr);
1073
1074 if (resp->tg != 1)
1075 return -EPROTO;
1076
1077 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1078
1079 target_data_len = resp_len - sizeof(struct pn533_poll_response);
1080
1081 switch (dev->poll_mod_curr) {
1082 case PN533_POLL_MOD_106KBPS_A:
1083 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
1084 target_data_len);
1085 break;
1086 case PN533_POLL_MOD_212KBPS_FELICA:
1087 case PN533_POLL_MOD_424KBPS_FELICA:
1088 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
1089 target_data_len);
1090 break;
1091 case PN533_POLL_MOD_106KBPS_JEWEL:
1092 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
1093 target_data_len);
1094 break;
1095 case PN533_POLL_MOD_847KBPS_B:
1096 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
1097 target_data_len);
1098 break;
1099 default:
1100 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
1101 " modulation");
1102 return -EPROTO;
1103 }
1104
1105 if (rc)
1106 return rc;
1107
1108 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1109 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
1110 " have the desired protocol");
1111 return -EAGAIN;
1112 }
1113
1114 nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
1115 "0x%x", nfc_tgt.supported_protocols);
1116
1117 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1118
1119 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1120
1121 return 0;
1122 }
1123
1124 static inline void pn533_poll_next_mod(struct pn533 *dev)
1125 {
1126 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1127 }
1128
1129 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1130 {
1131 dev->poll_mod_count = 0;
1132 }
1133
1134 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1135 {
1136 dev->poll_mod_active[dev->poll_mod_count] =
1137 (struct pn533_poll_modulations *) &poll_mod[mod_index];
1138 dev->poll_mod_count++;
1139 }
1140
1141 static void pn533_poll_create_mod_list(struct pn533 *dev,
1142 u32 im_protocols, u32 tm_protocols)
1143 {
1144 pn533_poll_reset_mod_list(dev);
1145
1146 if (im_protocols & NFC_PROTO_MIFARE_MASK
1147 || im_protocols & NFC_PROTO_ISO14443_MASK
1148 || im_protocols & NFC_PROTO_NFC_DEP_MASK)
1149 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1150
1151 if (im_protocols & NFC_PROTO_FELICA_MASK
1152 || im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1153 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1154 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1155 }
1156
1157 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1158 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1159
1160 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1161 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1162
1163 if (tm_protocols)
1164 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1165 }
1166
1167 static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
1168 u8 *params, int params_len)
1169 {
1170 struct pn533_poll_response *resp;
1171 int rc;
1172
1173 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1174
1175 resp = (struct pn533_poll_response *) params;
1176 if (resp->nbtg) {
1177 rc = pn533_target_found(dev, resp, params_len);
1178
1179 /* We must stop the poll after a valid target found */
1180 if (rc == 0) {
1181 pn533_poll_reset_mod_list(dev);
1182 return 0;
1183 }
1184 }
1185
1186 return -EAGAIN;
1187 }
1188
1189 static int pn533_init_target_frame(struct pn533_frame *frame,
1190 u8 *gb, size_t gb_len)
1191 {
1192 struct pn533_cmd_init_target *cmd;
1193 size_t cmd_len;
1194 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1195 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1196 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1197 0xff, 0xff}; /* System code */
1198 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1199 0x0, 0x0, 0x0,
1200 0x40}; /* SEL_RES for DEP */
1201
1202 cmd_len = sizeof(struct pn533_cmd_init_target) + gb_len + 1;
1203 cmd = kzalloc(cmd_len, GFP_KERNEL);
1204 if (cmd == NULL)
1205 return -ENOMEM;
1206
1207 pn533_tx_frame_init(frame, PN533_CMD_TG_INIT_AS_TARGET);
1208
1209 /* DEP support only */
1210 cmd->mode |= PN533_INIT_TARGET_DEP;
1211
1212 /* Felica params */
1213 memcpy(cmd->felica, felica_params, 18);
1214 get_random_bytes(cmd->felica + 2, 6);
1215
1216 /* NFCID3 */
1217 memset(cmd->nfcid3, 0, 10);
1218 memcpy(cmd->nfcid3, cmd->felica, 8);
1219
1220 /* MIFARE params */
1221 memcpy(cmd->mifare, mifare_params, 6);
1222
1223 /* General bytes */
1224 cmd->gb_len = gb_len;
1225 memcpy(cmd->gb, gb, gb_len);
1226
1227 /* Len Tk */
1228 cmd->gb[gb_len] = 0;
1229
1230 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), cmd, cmd_len);
1231
1232 frame->datalen += cmd_len;
1233
1234 pn533_tx_frame_finish(frame);
1235
1236 kfree(cmd);
1237
1238 return 0;
1239 }
1240
1241 #define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1242 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1243 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1244 u8 *params, int params_len)
1245 {
1246 struct sk_buff *skb_resp = arg;
1247 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1248
1249 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1250
1251 if (params_len < 0) {
1252 nfc_dev_err(&dev->interface->dev,
1253 "Error %d when starting as a target",
1254 params_len);
1255
1256 return params_len;
1257 }
1258
1259 if (params_len > 0 && params[0] != 0) {
1260 nfc_tm_deactivated(dev->nfc_dev);
1261
1262 dev->tgt_mode = 0;
1263
1264 kfree_skb(skb_resp);
1265 return 0;
1266 }
1267
1268 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1269 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1270 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1271
1272 return nfc_tm_data_received(dev->nfc_dev, skb_resp);
1273 }
1274
1275 static void pn533_wq_tg_get_data(struct work_struct *work)
1276 {
1277 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1278 struct pn533_frame *in_frame;
1279 struct sk_buff *skb_resp;
1280 size_t skb_resp_len;
1281
1282 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1283
1284 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1285 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1286 PN533_FRAME_TAIL_SIZE;
1287
1288 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
1289 if (!skb_resp)
1290 return;
1291
1292 in_frame = (struct pn533_frame *)skb_resp->data;
1293
1294 pn533_tx_frame_init(dev->out_frame, PN533_CMD_TG_GET_DATA);
1295 pn533_tx_frame_finish(dev->out_frame);
1296
1297 pn533_send_cmd_frame_async(dev, dev->out_frame, in_frame,
1298 skb_resp_len,
1299 pn533_tm_get_data_complete,
1300 skb_resp, GFP_KERNEL);
1301
1302 return;
1303 }
1304
1305 #define ATR_REQ_GB_OFFSET 17
1306 static int pn533_init_target_complete(struct pn533 *dev, void *arg,
1307 u8 *params, int params_len)
1308 {
1309 struct pn533_cmd_init_target_response *resp;
1310 u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb;
1311 size_t gb_len;
1312 int rc;
1313
1314 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1315
1316 if (params_len < 0) {
1317 nfc_dev_err(&dev->interface->dev,
1318 "Error %d when starting as a target",
1319 params_len);
1320
1321 return params_len;
1322 }
1323
1324 if (params_len < ATR_REQ_GB_OFFSET + 1)
1325 return -EINVAL;
1326
1327 resp = (struct pn533_cmd_init_target_response *) params;
1328
1329 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n",
1330 resp->mode, params_len);
1331
1332 frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK;
1333 if (frame == PN533_INIT_TARGET_RESP_ACTIVE)
1334 comm_mode = NFC_COMM_ACTIVE;
1335
1336 /* Again, only DEP */
1337 if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0)
1338 return -EOPNOTSUPP;
1339
1340 gb = resp->cmd + ATR_REQ_GB_OFFSET;
1341 gb_len = params_len - (ATR_REQ_GB_OFFSET + 1);
1342
1343 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1344 comm_mode, gb, gb_len);
1345 if (rc < 0) {
1346 nfc_dev_err(&dev->interface->dev,
1347 "Error when signaling target activation");
1348 return rc;
1349 }
1350
1351 dev->tgt_mode = 1;
1352
1353 queue_work(dev->wq, &dev->tg_work);
1354
1355 return 0;
1356 }
1357
1358 static void pn533_listen_mode_timer(unsigned long data)
1359 {
1360 struct pn533 *dev = (struct pn533 *) data;
1361
1362 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1363
1364 /* An ack will cancel the last issued command (poll) */
1365 pn533_send_ack(dev, GFP_ATOMIC);
1366
1367 dev->cancel_listen = 1;
1368
1369 pn533_poll_next_mod(dev);
1370
1371 queue_work(dev->wq, &dev->poll_work);
1372 }
1373
1374 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1375 u8 *params, int params_len)
1376 {
1377 struct pn533_poll_modulations *cur_mod;
1378 int rc;
1379
1380 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1381
1382 if (params_len == -ENOENT) {
1383 if (dev->poll_mod_count != 0)
1384 return 0;
1385
1386 nfc_dev_err(&dev->interface->dev,
1387 "Polling operation has been stopped");
1388
1389 goto stop_poll;
1390 }
1391
1392 if (params_len < 0) {
1393 nfc_dev_err(&dev->interface->dev,
1394 "Error %d when running poll", params_len);
1395
1396 goto stop_poll;
1397 }
1398
1399 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1400
1401 if (cur_mod->len == 0) {
1402 del_timer(&dev->listen_timer);
1403
1404 return pn533_init_target_complete(dev, arg, params, params_len);
1405 } else {
1406 rc = pn533_start_poll_complete(dev, arg, params, params_len);
1407 if (!rc)
1408 return rc;
1409 }
1410
1411 pn533_poll_next_mod(dev);
1412
1413 queue_work(dev->wq, &dev->poll_work);
1414
1415 return 0;
1416
1417 stop_poll:
1418 pn533_poll_reset_mod_list(dev);
1419 dev->poll_protocols = 0;
1420 return 0;
1421 }
1422
1423 static void pn533_build_poll_frame(struct pn533 *dev,
1424 struct pn533_frame *frame,
1425 struct pn533_poll_modulations *mod)
1426 {
1427 nfc_dev_dbg(&dev->interface->dev, "mod len %d\n", mod->len);
1428
1429 if (mod->len == 0) {
1430 /* Listen mode */
1431 pn533_init_target_frame(frame, dev->gb, dev->gb_len);
1432 } else {
1433 /* Polling mode */
1434 pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
1435
1436 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1437 frame->datalen += mod->len;
1438
1439 pn533_tx_frame_finish(frame);
1440 }
1441 }
1442
1443 static int pn533_send_poll_frame(struct pn533 *dev)
1444 {
1445 struct pn533_poll_modulations *cur_mod;
1446 int rc;
1447
1448 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1449
1450 pn533_build_poll_frame(dev, dev->out_frame, cur_mod);
1451
1452 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1453 dev->in_maxlen, pn533_poll_complete,
1454 NULL, GFP_KERNEL);
1455 if (rc)
1456 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1457
1458 return rc;
1459 }
1460
1461 static void pn533_wq_poll(struct work_struct *work)
1462 {
1463 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1464 struct pn533_poll_modulations *cur_mod;
1465 int rc;
1466
1467 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1468
1469 nfc_dev_dbg(&dev->interface->dev,
1470 "%s cancel_listen %d modulation len %d",
1471 __func__, dev->cancel_listen, cur_mod->len);
1472
1473 if (dev->cancel_listen == 1) {
1474 dev->cancel_listen = 0;
1475 usb_kill_urb(dev->in_urb);
1476 }
1477
1478 rc = pn533_send_poll_frame(dev);
1479 if (rc)
1480 return;
1481
1482 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1483 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1484
1485 return;
1486 }
1487
1488 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1489 u32 im_protocols, u32 tm_protocols)
1490 {
1491 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1492
1493 nfc_dev_dbg(&dev->interface->dev,
1494 "%s: im protocols 0x%x tm protocols 0x%x",
1495 __func__, im_protocols, tm_protocols);
1496
1497 if (dev->tgt_active_prot) {
1498 nfc_dev_err(&dev->interface->dev,
1499 "Cannot poll with a target already activated");
1500 return -EBUSY;
1501 }
1502
1503 if (dev->tgt_mode) {
1504 nfc_dev_err(&dev->interface->dev,
1505 "Cannot poll while already being activated");
1506 return -EBUSY;
1507 }
1508
1509 if (tm_protocols) {
1510 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1511 if (dev->gb == NULL)
1512 tm_protocols = 0;
1513 }
1514
1515 dev->poll_mod_curr = 0;
1516 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1517 dev->poll_protocols = im_protocols;
1518 dev->listen_protocols = tm_protocols;
1519
1520 return pn533_send_poll_frame(dev);
1521 }
1522
1523 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1524 {
1525 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1526
1527 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1528
1529 del_timer(&dev->listen_timer);
1530
1531 if (!dev->poll_mod_count) {
1532 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1533 " running");
1534 return;
1535 }
1536
1537 /* An ack will cancel the last issued command (poll) */
1538 pn533_send_ack(dev, GFP_KERNEL);
1539
1540 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1541 usb_kill_urb(dev->in_urb);
1542
1543 pn533_poll_reset_mod_list(dev);
1544 }
1545
1546 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1547 {
1548 struct pn533_cmd_activate_param param;
1549 struct pn533_cmd_activate_response *resp;
1550 u16 gt_len;
1551 int rc;
1552
1553 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1554
1555 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1556
1557 param.tg = 1;
1558 param.next = 0;
1559 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1560 sizeof(struct pn533_cmd_activate_param));
1561 dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1562
1563 pn533_tx_frame_finish(dev->out_frame);
1564
1565 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1566 dev->in_maxlen);
1567 if (rc)
1568 return rc;
1569
1570 resp = (struct pn533_cmd_activate_response *)
1571 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1572 rc = resp->status & PN533_CMD_RET_MASK;
1573 if (rc != PN533_CMD_RET_SUCCESS)
1574 return -EIO;
1575
1576 /* ATR_RES general bytes are located at offset 16 */
1577 gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1578 rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1579
1580 return rc;
1581 }
1582
1583 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1584 struct nfc_target *target, u32 protocol)
1585 {
1586 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1587 int rc;
1588
1589 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1590 protocol);
1591
1592 if (dev->poll_mod_count) {
1593 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1594 " polling");
1595 return -EBUSY;
1596 }
1597
1598 if (dev->tgt_active_prot) {
1599 nfc_dev_err(&dev->interface->dev, "There is already an active"
1600 " target");
1601 return -EBUSY;
1602 }
1603
1604 if (!dev->tgt_available_prots) {
1605 nfc_dev_err(&dev->interface->dev, "There is no available target"
1606 " to activate");
1607 return -EINVAL;
1608 }
1609
1610 if (!(dev->tgt_available_prots & (1 << protocol))) {
1611 nfc_dev_err(&dev->interface->dev, "The target does not support"
1612 " the requested protocol %u", protocol);
1613 return -EINVAL;
1614 }
1615
1616 if (protocol == NFC_PROTO_NFC_DEP) {
1617 rc = pn533_activate_target_nfcdep(dev);
1618 if (rc) {
1619 nfc_dev_err(&dev->interface->dev, "Error %d when"
1620 " activating target with"
1621 " NFC_DEP protocol", rc);
1622 return rc;
1623 }
1624 }
1625
1626 dev->tgt_active_prot = protocol;
1627 dev->tgt_available_prots = 0;
1628
1629 return 0;
1630 }
1631
1632 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1633 struct nfc_target *target)
1634 {
1635 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1636 u8 tg;
1637 u8 status;
1638 int rc;
1639
1640 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1641
1642 if (!dev->tgt_active_prot) {
1643 nfc_dev_err(&dev->interface->dev, "There is no active target");
1644 return;
1645 }
1646
1647 dev->tgt_active_prot = 0;
1648
1649 skb_queue_purge(&dev->resp_q);
1650
1651 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1652
1653 tg = 1;
1654 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1655 dev->out_frame->datalen += sizeof(u8);
1656
1657 pn533_tx_frame_finish(dev->out_frame);
1658
1659 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1660 dev->in_maxlen);
1661 if (rc) {
1662 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1663 " command to the controller");
1664 return;
1665 }
1666
1667 status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1668 rc = status & PN533_CMD_RET_MASK;
1669 if (rc != PN533_CMD_RET_SUCCESS)
1670 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1671 " the target", rc);
1672
1673 return;
1674 }
1675
1676
1677 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1678 u8 *params, int params_len)
1679 {
1680 struct pn533_cmd_jump_dep *cmd;
1681 struct pn533_cmd_jump_dep_response *resp;
1682 struct nfc_target nfc_target;
1683 u8 target_gt_len;
1684 int rc;
1685
1686 if (params_len == -ENOENT) {
1687 nfc_dev_dbg(&dev->interface->dev, "");
1688 return 0;
1689 }
1690
1691 if (params_len < 0) {
1692 nfc_dev_err(&dev->interface->dev,
1693 "Error %d when bringing DEP link up",
1694 params_len);
1695 return 0;
1696 }
1697
1698 if (dev->tgt_available_prots &&
1699 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1700 nfc_dev_err(&dev->interface->dev,
1701 "The target does not support DEP");
1702 return -EINVAL;
1703 }
1704
1705 resp = (struct pn533_cmd_jump_dep_response *) params;
1706 cmd = (struct pn533_cmd_jump_dep *) arg;
1707 rc = resp->status & PN533_CMD_RET_MASK;
1708 if (rc != PN533_CMD_RET_SUCCESS) {
1709 nfc_dev_err(&dev->interface->dev,
1710 "Bringing DEP link up failed %d", rc);
1711 return 0;
1712 }
1713
1714 if (!dev->tgt_available_prots) {
1715 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1716
1717 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1718 nfc_target.nfcid1_len = 10;
1719 memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
1720 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1721 if (rc)
1722 return 0;
1723
1724 dev->tgt_available_prots = 0;
1725 }
1726
1727 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1728
1729 /* ATR_RES general bytes are located at offset 17 */
1730 target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1731 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1732 resp->gt, target_gt_len);
1733 if (rc == 0)
1734 rc = nfc_dep_link_is_up(dev->nfc_dev,
1735 dev->nfc_dev->targets[0].idx,
1736 !cmd->active, NFC_RF_INITIATOR);
1737
1738 return 0;
1739 }
1740
1741 static int pn533_mod_to_baud(struct pn533 *dev)
1742 {
1743 switch (dev->poll_mod_curr) {
1744 case PN533_POLL_MOD_106KBPS_A:
1745 return 0;
1746 case PN533_POLL_MOD_212KBPS_FELICA:
1747 return 1;
1748 case PN533_POLL_MOD_424KBPS_FELICA:
1749 return 2;
1750 default:
1751 return -EINVAL;
1752 }
1753 }
1754
1755 #define PASSIVE_DATA_LEN 5
1756 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1757 u8 comm_mode, u8* gb, size_t gb_len)
1758 {
1759 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1760 struct pn533_cmd_jump_dep *cmd;
1761 u8 cmd_len, *data_ptr;
1762 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1763 int rc, baud;
1764
1765 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1766
1767 if (dev->poll_mod_count) {
1768 nfc_dev_err(&dev->interface->dev,
1769 "Cannot bring the DEP link up while polling");
1770 return -EBUSY;
1771 }
1772
1773 if (dev->tgt_active_prot) {
1774 nfc_dev_err(&dev->interface->dev,
1775 "There is already an active target");
1776 return -EBUSY;
1777 }
1778
1779 baud = pn533_mod_to_baud(dev);
1780 if (baud < 0) {
1781 nfc_dev_err(&dev->interface->dev,
1782 "Invalid curr modulation %d", dev->poll_mod_curr);
1783 return baud;
1784 }
1785
1786 cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
1787 if (comm_mode == NFC_COMM_PASSIVE)
1788 cmd_len += PASSIVE_DATA_LEN;
1789
1790 cmd = kzalloc(cmd_len, GFP_KERNEL);
1791 if (cmd == NULL)
1792 return -ENOMEM;
1793
1794 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1795
1796 cmd->active = !comm_mode;
1797 cmd->next = 0;
1798 cmd->baud = baud;
1799 data_ptr = cmd->data;
1800 if (comm_mode == NFC_COMM_PASSIVE && cmd->baud > 0) {
1801 memcpy(data_ptr, passive_data, PASSIVE_DATA_LEN);
1802 cmd->next |= 1;
1803 data_ptr += PASSIVE_DATA_LEN;
1804 }
1805
1806 if (gb != NULL && gb_len > 0) {
1807 cmd->next |= 4; /* We have some Gi */
1808 memcpy(data_ptr, gb, gb_len);
1809 } else {
1810 cmd->next = 0;
1811 }
1812
1813 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1814 dev->out_frame->datalen += cmd_len;
1815
1816 pn533_tx_frame_finish(dev->out_frame);
1817
1818 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1819 dev->in_maxlen, pn533_in_dep_link_up_complete,
1820 cmd, GFP_KERNEL);
1821 if (rc)
1822 goto out;
1823
1824
1825 out:
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 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2081
2082 if (params_len < 0) {
2083 nfc_dev_err(&dev->interface->dev,
2084 "Error %d when sending data",
2085 params_len);
2086
2087 return params_len;
2088 }
2089
2090 if (params_len > 0 && params[0] != 0) {
2091 nfc_tm_deactivated(dev->nfc_dev);
2092
2093 dev->tgt_mode = 0;
2094
2095 return 0;
2096 }
2097
2098 queue_work(dev->wq, &dev->tg_work);
2099
2100 return 0;
2101 }
2102
2103 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2104 {
2105 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2106 struct pn533_frame *out_frame;
2107 int rc;
2108
2109 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2110
2111 rc = pn533_build_tx_frame(dev, skb, false);
2112 if (rc)
2113 goto error;
2114
2115 out_frame = (struct pn533_frame *) skb->data;
2116
2117 rc = pn533_send_cmd_frame_async(dev, out_frame, dev->in_frame,
2118 dev->in_maxlen, pn533_tm_send_complete,
2119 NULL, GFP_KERNEL);
2120 if (rc) {
2121 nfc_dev_err(&dev->interface->dev,
2122 "Error %d when trying to send data", rc);
2123 goto error;
2124 }
2125
2126 return 0;
2127
2128 error:
2129 kfree_skb(skb);
2130
2131 return rc;
2132 }
2133
2134 static void pn533_wq_mi_recv(struct work_struct *work)
2135 {
2136 struct pn533 *dev = container_of(work, struct pn533, mi_work);
2137 struct sk_buff *skb_cmd;
2138 struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg;
2139 struct pn533_frame *out_frame, *in_frame;
2140 struct sk_buff *skb_resp;
2141 int skb_resp_len;
2142 int rc;
2143
2144 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2145
2146 /* This is a zero payload size skb */
2147 skb_cmd = alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN + PN533_FRAME_TAIL_SIZE,
2148 GFP_KERNEL);
2149 if (skb_cmd == NULL)
2150 goto error_cmd;
2151
2152 skb_reserve(skb_cmd, PN533_CMD_DATAEXCH_HEAD_LEN);
2153
2154 rc = pn533_build_tx_frame(dev, skb_cmd, true);
2155 if (rc)
2156 goto error_frame;
2157
2158 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
2159 PN533_CMD_DATAEXCH_DATA_MAXLEN +
2160 PN533_FRAME_TAIL_SIZE;
2161 skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL);
2162 if (!skb_resp) {
2163 rc = -ENOMEM;
2164 goto error_frame;
2165 }
2166
2167 in_frame = (struct pn533_frame *) skb_resp->data;
2168 out_frame = (struct pn533_frame *) skb_cmd->data;
2169
2170 arg->skb_resp = skb_resp;
2171 arg->skb_out = skb_cmd;
2172
2173 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
2174 skb_resp_len,
2175 pn533_data_exchange_complete,
2176 dev->cmd_complete_arg, GFP_KERNEL);
2177 if (!rc)
2178 return;
2179
2180 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
2181 " perform data_exchange", rc);
2182
2183 kfree_skb(skb_resp);
2184
2185 error_frame:
2186 kfree_skb(skb_cmd);
2187
2188 error_cmd:
2189 pn533_send_ack(dev, GFP_KERNEL);
2190
2191 kfree(arg);
2192
2193 queue_work(dev->wq, &dev->cmd_work);
2194 }
2195
2196 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2197 u8 cfgdata_len)
2198 {
2199 int rc;
2200 u8 *params;
2201
2202 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2203
2204 pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
2205
2206 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
2207 params[0] = cfgitem;
2208 memcpy(&params[1], cfgdata, cfgdata_len);
2209 dev->out_frame->datalen += (1 + cfgdata_len);
2210
2211 pn533_tx_frame_finish(dev->out_frame);
2212
2213 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
2214 dev->in_maxlen);
2215
2216 return rc;
2217 }
2218
2219 static int pn533_fw_reset(struct pn533 *dev)
2220 {
2221 int rc;
2222 u8 *params;
2223
2224 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2225
2226 pn533_tx_frame_init(dev->out_frame, 0x18);
2227
2228 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
2229 params[0] = 0x1;
2230 dev->out_frame->datalen += 1;
2231
2232 pn533_tx_frame_finish(dev->out_frame);
2233
2234 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
2235 dev->in_maxlen);
2236
2237 return rc;
2238 }
2239
2240 static struct nfc_ops pn533_nfc_ops = {
2241 .dev_up = NULL,
2242 .dev_down = NULL,
2243 .dep_link_up = pn533_dep_link_up,
2244 .dep_link_down = pn533_dep_link_down,
2245 .start_poll = pn533_start_poll,
2246 .stop_poll = pn533_stop_poll,
2247 .activate_target = pn533_activate_target,
2248 .deactivate_target = pn533_deactivate_target,
2249 .im_transceive = pn533_transceive,
2250 .tm_send = pn533_tm_send,
2251 };
2252
2253 static int pn533_setup(struct pn533 *dev)
2254 {
2255 struct pn533_config_max_retries max_retries;
2256 struct pn533_config_timing timing;
2257 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2258 int rc;
2259
2260 switch (dev->device_type) {
2261 case PN533_DEVICE_STD:
2262 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2263 max_retries.mx_rty_psl = 2;
2264 max_retries.mx_rty_passive_act =
2265 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2266
2267 timing.rfu = PN533_CONFIG_TIMING_102;
2268 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2269 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2270
2271 break;
2272
2273 case PN533_DEVICE_PASORI:
2274 max_retries.mx_rty_atr = 0x2;
2275 max_retries.mx_rty_psl = 0x1;
2276 max_retries.mx_rty_passive_act =
2277 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2278
2279 timing.rfu = PN533_CONFIG_TIMING_102;
2280 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2281 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2282
2283 break;
2284
2285 default:
2286 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2287 dev->device_type);
2288 return -EINVAL;
2289 }
2290
2291 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2292 (u8 *)&max_retries, sizeof(max_retries));
2293 if (rc) {
2294 nfc_dev_err(&dev->interface->dev,
2295 "Error on setting MAX_RETRIES config");
2296 return rc;
2297 }
2298
2299
2300 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2301 (u8 *)&timing, sizeof(timing));
2302 if (rc) {
2303 nfc_dev_err(&dev->interface->dev,
2304 "Error on setting RF timings");
2305 return rc;
2306 }
2307
2308 switch (dev->device_type) {
2309 case PN533_DEVICE_STD:
2310 break;
2311
2312 case PN533_DEVICE_PASORI:
2313 pn533_fw_reset(dev);
2314
2315 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2316 pasori_cfg, 3);
2317 if (rc) {
2318 nfc_dev_err(&dev->interface->dev,
2319 "Error while settings PASORI config");
2320 return rc;
2321 }
2322
2323 pn533_fw_reset(dev);
2324
2325 break;
2326 }
2327
2328 return 0;
2329 }
2330
2331 static int pn533_probe(struct usb_interface *interface,
2332 const struct usb_device_id *id)
2333 {
2334 struct pn533_fw_version *fw_ver;
2335 struct pn533 *dev;
2336 struct usb_host_interface *iface_desc;
2337 struct usb_endpoint_descriptor *endpoint;
2338 int in_endpoint = 0;
2339 int out_endpoint = 0;
2340 int rc = -ENOMEM;
2341 int i;
2342 u32 protocols;
2343
2344 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2345 if (!dev)
2346 return -ENOMEM;
2347
2348 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2349 dev->interface = interface;
2350 mutex_init(&dev->cmd_lock);
2351
2352 iface_desc = interface->cur_altsetting;
2353 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2354 endpoint = &iface_desc->endpoint[i].desc;
2355
2356 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
2357 dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
2358 in_endpoint = endpoint->bEndpointAddress;
2359 }
2360
2361 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
2362 dev->out_maxlen =
2363 le16_to_cpu(endpoint->wMaxPacketSize);
2364 out_endpoint = endpoint->bEndpointAddress;
2365 }
2366 }
2367
2368 if (!in_endpoint || !out_endpoint) {
2369 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
2370 " bulk-out endpoint");
2371 rc = -ENODEV;
2372 goto error;
2373 }
2374
2375 dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
2376 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2377 dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
2378 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2379
2380 if (!dev->in_frame || !dev->out_frame ||
2381 !dev->in_urb || !dev->out_urb)
2382 goto error;
2383
2384 usb_fill_bulk_urb(dev->in_urb, dev->udev,
2385 usb_rcvbulkpipe(dev->udev, in_endpoint),
2386 NULL, 0, NULL, dev);
2387 usb_fill_bulk_urb(dev->out_urb, dev->udev,
2388 usb_sndbulkpipe(dev->udev, out_endpoint),
2389 NULL, 0,
2390 pn533_send_complete, dev);
2391
2392 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2393 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2394 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2395 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2396 INIT_WORK(&dev->poll_work, pn533_wq_poll);
2397 dev->wq = alloc_ordered_workqueue("pn533", 0);
2398 if (dev->wq == NULL)
2399 goto error;
2400
2401 init_timer(&dev->listen_timer);
2402 dev->listen_timer.data = (unsigned long) dev;
2403 dev->listen_timer.function = pn533_listen_mode_timer;
2404
2405 skb_queue_head_init(&dev->resp_q);
2406
2407 INIT_LIST_HEAD(&dev->cmd_queue);
2408
2409 usb_set_intfdata(interface, dev);
2410
2411 pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
2412 pn533_tx_frame_finish(dev->out_frame);
2413
2414 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
2415 dev->in_maxlen);
2416 if (rc)
2417 goto destroy_wq;
2418
2419 fw_ver = (struct pn533_fw_version *)
2420 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
2421 nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
2422 " attached", fw_ver->ver, fw_ver->rev);
2423
2424 dev->device_type = id->driver_info;
2425 switch (dev->device_type) {
2426 case PN533_DEVICE_STD:
2427 protocols = PN533_ALL_PROTOCOLS;
2428 break;
2429
2430 case PN533_DEVICE_PASORI:
2431 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2432 break;
2433
2434 default:
2435 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2436 dev->device_type);
2437 rc = -EINVAL;
2438 goto destroy_wq;
2439 }
2440
2441 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2442 PN533_CMD_DATAEXCH_HEAD_LEN,
2443 PN533_FRAME_TAIL_SIZE);
2444 if (!dev->nfc_dev)
2445 goto destroy_wq;
2446
2447 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2448 nfc_set_drvdata(dev->nfc_dev, dev);
2449
2450 rc = nfc_register_device(dev->nfc_dev);
2451 if (rc)
2452 goto free_nfc_dev;
2453
2454 rc = pn533_setup(dev);
2455 if (rc)
2456 goto unregister_nfc_dev;
2457
2458 return 0;
2459
2460 unregister_nfc_dev:
2461 nfc_unregister_device(dev->nfc_dev);
2462
2463 free_nfc_dev:
2464 nfc_free_device(dev->nfc_dev);
2465
2466 destroy_wq:
2467 destroy_workqueue(dev->wq);
2468 error:
2469 kfree(dev->in_frame);
2470 usb_free_urb(dev->in_urb);
2471 kfree(dev->out_frame);
2472 usb_free_urb(dev->out_urb);
2473 kfree(dev);
2474 return rc;
2475 }
2476
2477 static void pn533_disconnect(struct usb_interface *interface)
2478 {
2479 struct pn533 *dev;
2480 struct pn533_cmd *cmd, *n;
2481
2482 dev = usb_get_intfdata(interface);
2483 usb_set_intfdata(interface, NULL);
2484
2485 nfc_unregister_device(dev->nfc_dev);
2486 nfc_free_device(dev->nfc_dev);
2487
2488 usb_kill_urb(dev->in_urb);
2489 usb_kill_urb(dev->out_urb);
2490
2491 destroy_workqueue(dev->wq);
2492
2493 skb_queue_purge(&dev->resp_q);
2494
2495 del_timer(&dev->listen_timer);
2496
2497 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2498 list_del(&cmd->queue);
2499 kfree(cmd);
2500 }
2501
2502 kfree(dev->in_frame);
2503 usb_free_urb(dev->in_urb);
2504 kfree(dev->out_frame);
2505 usb_free_urb(dev->out_urb);
2506 kfree(dev);
2507
2508 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2509 }
2510
2511 static struct usb_driver pn533_driver = {
2512 .name = "pn533",
2513 .probe = pn533_probe,
2514 .disconnect = pn533_disconnect,
2515 .id_table = pn533_table,
2516 };
2517
2518 module_usb_driver(pn533_driver);
2519
2520 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
2521 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2522 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2523 MODULE_VERSION(VERSION);
2524 MODULE_LICENSE("GPL");
Linux 2.6 libata-dev (mirror)