2 * Driver for NXP PN533 NFC Chip - core functions
4 * Copyright (C) 2011 Instituto Nokia de Tecnologia
5 * Copyright (C) 2012-2013 Tieto Poland
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include <linux/device.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/slab.h>
25 #include <linux/nfc.h>
26 #include <linux/netdevice.h>
27 #include <net/nfc/nfc.h>
32 /* How much time we spend listening for initiators */
33 #define PN533_LISTEN_TIME 2
34 /* Delay between each poll frame (ms) */
35 #define PN533_POLL_INTERVAL 10
37 /* structs for pn533 commands */
39 /* PN533_CMD_GET_FIRMWARE_VERSION */
40 struct pn533_fw_version {
47 /* PN533_CMD_RF_CONFIGURATION */
48 #define PN533_CFGITEM_RF_FIELD 0x01
49 #define PN533_CFGITEM_TIMING 0x02
50 #define PN533_CFGITEM_MAX_RETRIES 0x05
51 #define PN533_CFGITEM_PASORI 0x82
53 #define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
54 #define PN533_CFGITEM_RF_FIELD_ON 0x1
55 #define PN533_CFGITEM_RF_FIELD_OFF 0x0
57 #define PN533_CONFIG_TIMING_102 0xb
58 #define PN533_CONFIG_TIMING_204 0xc
59 #define PN533_CONFIG_TIMING_409 0xd
60 #define PN533_CONFIG_TIMING_819 0xe
62 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
63 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
65 struct pn533_config_max_retries {
68 u8 mx_rty_passive_act;
71 struct pn533_config_timing {
77 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
79 /* felica commands opcode */
80 #define PN533_FELICA_OPC_SENSF_REQ 0
81 #define PN533_FELICA_OPC_SENSF_RES 1
82 /* felica SENSF_REQ parameters */
83 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
84 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
85 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
86 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
88 /* type B initiator_data values */
89 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
90 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
91 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
93 union pn533_cmd_poll_initdata {
106 struct pn533_poll_modulations {
110 union pn533_cmd_poll_initdata initiator_data;
115 static const struct pn533_poll_modulations poll_mod[] = {
116 [PN533_POLL_MOD_106KBPS_A] = {
123 [PN533_POLL_MOD_212KBPS_FELICA] = {
127 .initiator_data.felica = {
128 .opcode = PN533_FELICA_OPC_SENSF_REQ,
129 .sc = PN533_FELICA_SENSF_SC_ALL,
130 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
136 [PN533_POLL_MOD_424KBPS_FELICA] = {
140 .initiator_data.felica = {
141 .opcode = PN533_FELICA_OPC_SENSF_REQ,
142 .sc = PN533_FELICA_SENSF_SC_ALL,
143 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
149 [PN533_POLL_MOD_106KBPS_JEWEL] = {
156 [PN533_POLL_MOD_847KBPS_B] = {
160 .initiator_data.type_b = {
161 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
163 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
168 [PN533_LISTEN_MOD] = {
173 /* PN533_CMD_IN_ATR */
175 struct pn533_cmd_activate_response {
187 struct pn533_cmd_jump_dep_response {
201 /* PN533_TG_INIT_AS_TARGET */
202 #define PN533_INIT_TARGET_PASSIVE 0x1
203 #define PN533_INIT_TARGET_DEP 0x2
205 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
206 #define PN533_INIT_TARGET_RESP_ACTIVE 0x1
207 #define PN533_INIT_TARGET_RESP_DEP 0x4
209 /* The rule: value(high byte) + value(low byte) + checksum = 0 */
210 static inline u8 pn533_ext_checksum(u16 value)
212 return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
215 /* The rule: value + checksum = 0 */
216 static inline u8 pn533_std_checksum(u8 value)
221 /* The rule: sum(data elements) + checksum = 0 */
222 static u8 pn533_std_data_checksum(u8 *data, int datalen)
227 for (i = 0; i < datalen; i++)
230 return pn533_std_checksum(sum);
233 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
235 struct pn533_std_frame *frame = _frame;
238 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
239 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
240 PN533_FRAME_CMD(frame) = cmd_code;
244 static void pn533_std_tx_frame_finish(void *_frame)
246 struct pn533_std_frame *frame = _frame;
248 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
250 PN533_STD_FRAME_CHECKSUM(frame) =
251 pn533_std_data_checksum(frame->data, frame->datalen);
253 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
256 static void pn533_std_tx_update_payload_len(void *_frame, int len)
258 struct pn533_std_frame *frame = _frame;
260 frame->datalen += len;
263 static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
266 struct pn533_std_frame *stdf = _frame;
268 if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
271 if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
272 /* Standard frame code */
273 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
275 checksum = pn533_std_checksum(stdf->datalen);
276 if (checksum != stdf->datalen_checksum)
279 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
280 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
284 struct pn533_ext_frame *eif = _frame;
286 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
288 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
289 if (checksum != eif->datalen_checksum)
292 /* check data checksum */
293 checksum = pn533_std_data_checksum(eif->data,
294 be16_to_cpu(eif->datalen));
295 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
302 bool pn533_rx_frame_is_ack(void *_frame)
304 struct pn533_std_frame *frame = _frame;
306 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
309 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
314 EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack);
316 static inline int pn533_std_rx_frame_size(void *frame)
318 struct pn533_std_frame *f = frame;
320 /* check for Extended Information frame */
321 if (PN533_STD_IS_EXTENDED(f)) {
322 struct pn533_ext_frame *eif = frame;
324 return sizeof(struct pn533_ext_frame)
325 + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
328 return sizeof(struct pn533_std_frame) + f->datalen +
329 PN533_STD_FRAME_TAIL_LEN;
332 static u8 pn533_std_get_cmd_code(void *frame)
334 struct pn533_std_frame *f = frame;
335 struct pn533_ext_frame *eif = frame;
337 if (PN533_STD_IS_EXTENDED(f))
338 return PN533_FRAME_CMD(eif);
340 return PN533_FRAME_CMD(f);
343 bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
345 return (dev->ops->get_cmd_code(frame) ==
346 PN533_CMD_RESPONSE(dev->cmd->code));
348 EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response);
351 static struct pn533_frame_ops pn533_std_frame_ops = {
352 .tx_frame_init = pn533_std_tx_frame_init,
353 .tx_frame_finish = pn533_std_tx_frame_finish,
354 .tx_update_payload_len = pn533_std_tx_update_payload_len,
355 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
356 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
358 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
359 .rx_frame_size = pn533_std_rx_frame_size,
360 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
361 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
363 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
364 .get_cmd_code = pn533_std_get_cmd_code,
367 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
370 /* payload is already there, just update datalen */
371 int payload_len = skb->len;
372 struct pn533_frame_ops *ops = dev->ops;
375 skb_push(skb, ops->tx_header_len);
376 skb_put(skb, ops->tx_tail_len);
378 ops->tx_frame_init(skb->data, cmd_code);
379 ops->tx_update_payload_len(skb->data, payload_len);
380 ops->tx_frame_finish(skb->data);
383 static int pn533_send_async_complete(struct pn533 *dev)
385 struct pn533_cmd *cmd = dev->cmd;
386 struct sk_buff *resp;
390 dev_dbg(dev->dev, "%s: cmd not set\n", __func__);
394 dev_kfree_skb(cmd->req);
396 status = cmd->status;
400 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
406 /* when no response is set we got interrupted */
408 resp = ERR_PTR(-EINTR);
411 skb_pull(resp, dev->ops->rx_header_len);
412 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
415 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
423 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
425 pn533_send_async_complete_t complete_cb,
426 void *complete_cb_context)
428 struct pn533_cmd *cmd;
431 dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code);
433 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
437 cmd->code = cmd_code;
439 cmd->complete_cb = complete_cb;
440 cmd->complete_cb_context = complete_cb_context;
442 pn533_build_cmd_frame(dev, cmd_code, req);
444 mutex_lock(&dev->cmd_lock);
446 if (!dev->cmd_pending) {
448 rc = dev->phy_ops->send_frame(dev, req);
454 dev->cmd_pending = 1;
458 dev_dbg(dev->dev, "%s Queueing command 0x%x\n",
461 INIT_LIST_HEAD(&cmd->queue);
462 list_add_tail(&cmd->queue, &dev->cmd_queue);
469 mutex_unlock(&dev->cmd_lock);
473 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
475 pn533_send_async_complete_t complete_cb,
476 void *complete_cb_context)
480 rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
481 complete_cb_context);
486 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
488 pn533_send_async_complete_t complete_cb,
489 void *complete_cb_context)
493 rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
494 complete_cb_context);
500 * pn533_send_cmd_direct_async
502 * The function sends a piority cmd directly to the chip omitting the cmd
503 * queue. It's intended to be used by chaining mechanism of received responses
504 * where the host has to request every single chunk of data before scheduling
505 * next cmd from the queue.
507 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
509 pn533_send_async_complete_t complete_cb,
510 void *complete_cb_context)
512 struct pn533_cmd *cmd;
515 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
519 cmd->code = cmd_code;
521 cmd->complete_cb = complete_cb;
522 cmd->complete_cb_context = complete_cb_context;
524 pn533_build_cmd_frame(dev, cmd_code, req);
527 rc = dev->phy_ops->send_frame(dev, req);
536 static void pn533_wq_cmd_complete(struct work_struct *work)
538 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
541 rc = pn533_send_async_complete(dev);
542 if (rc != -EINPROGRESS)
543 queue_work(dev->wq, &dev->cmd_work);
546 static void pn533_wq_cmd(struct work_struct *work)
548 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
549 struct pn533_cmd *cmd;
552 mutex_lock(&dev->cmd_lock);
554 if (list_empty(&dev->cmd_queue)) {
555 dev->cmd_pending = 0;
556 mutex_unlock(&dev->cmd_lock);
560 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
562 list_del(&cmd->queue);
564 mutex_unlock(&dev->cmd_lock);
567 rc = dev->phy_ops->send_frame(dev, cmd->req);
570 dev_kfree_skb(cmd->req);
577 struct pn533_sync_cmd_response {
578 struct sk_buff *resp;
579 struct completion done;
582 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
583 struct sk_buff *resp)
585 struct pn533_sync_cmd_response *arg = _arg;
588 complete(&arg->done);
593 /* pn533_send_cmd_sync
595 * Please note the req parameter is freed inside the function to
596 * limit a number of return value interpretations by the caller.
598 * 1. negative in case of error during TX path -> req should be freed
600 * 2. negative in case of error during RX path -> req should not be freed
601 * as it's been already freed at the beginning of RX path by
604 * 3. valid pointer in case of succesfult RX path
606 * A caller has to check a return value with IS_ERR macro. If the test pass,
607 * the returned pointer is valid.
610 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
614 struct pn533_sync_cmd_response arg;
616 init_completion(&arg.done);
618 rc = pn533_send_cmd_async(dev, cmd_code, req,
619 pn533_send_sync_complete, &arg);
625 wait_for_completion(&arg.done);
630 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
634 skb = alloc_skb(dev->ops->tx_header_len +
636 dev->ops->tx_tail_len, GFP_KERNEL);
639 skb_reserve(skb, dev->ops->tx_header_len);
644 struct pn533_target_type_a {
652 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
653 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
654 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
656 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
657 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
659 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
660 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
662 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
663 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
664 #define PN533_TYPE_A_SEL_PROT_DEP 2
665 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
667 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
673 if (target_data_len < sizeof(struct pn533_target_type_a))
677 * The length check of nfcid[] and ats[] are not being performed because
678 * the values are not being used
681 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
682 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
683 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
685 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
686 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
687 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
688 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
691 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
692 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
695 if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE)
701 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
704 struct pn533_target_type_a *tgt_type_a;
706 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
708 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
711 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
712 case PN533_TYPE_A_SEL_PROT_MIFARE:
713 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
715 case PN533_TYPE_A_SEL_PROT_ISO14443:
716 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
718 case PN533_TYPE_A_SEL_PROT_DEP:
719 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
721 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
722 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
723 NFC_PROTO_NFC_DEP_MASK;
727 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
728 nfc_tgt->sel_res = tgt_type_a->sel_res;
729 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
730 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
735 struct pn533_target_felica {
738 u8 nfcid2[NFC_NFCID2_MAXSIZE];
744 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
745 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
747 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
750 if (target_data_len < sizeof(struct pn533_target_felica))
753 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
759 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
762 struct pn533_target_felica *tgt_felica;
764 tgt_felica = (struct pn533_target_felica *)tgt_data;
766 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
769 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
770 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
771 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
773 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
775 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
776 nfc_tgt->sensf_res_len = 9;
778 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
779 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
784 struct pn533_target_jewel {
789 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
795 if (target_data_len < sizeof(struct pn533_target_jewel))
798 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
799 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
800 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
802 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
803 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
804 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
805 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
811 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
814 struct pn533_target_jewel *tgt_jewel;
816 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
818 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
821 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
822 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
823 nfc_tgt->nfcid1_len = 4;
824 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
829 struct pn533_type_b_prot_info {
835 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
836 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
837 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
839 struct pn533_type_b_sens_res {
843 struct pn533_type_b_prot_info prot_info;
846 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
848 struct pn533_target_type_b {
849 struct pn533_type_b_sens_res sensb_res;
854 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
857 if (target_data_len < sizeof(struct pn533_target_type_b))
860 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
863 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
864 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
870 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
873 struct pn533_target_type_b *tgt_type_b;
875 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
877 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
880 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
885 static void pn533_poll_reset_mod_list(struct pn533 *dev);
886 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
889 struct nfc_target nfc_tgt;
892 dev_dbg(dev->dev, "%s: modulation=%d\n",
893 __func__, dev->poll_mod_curr);
898 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
900 switch (dev->poll_mod_curr) {
901 case PN533_POLL_MOD_106KBPS_A:
902 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
904 case PN533_POLL_MOD_212KBPS_FELICA:
905 case PN533_POLL_MOD_424KBPS_FELICA:
906 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
908 case PN533_POLL_MOD_106KBPS_JEWEL:
909 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
911 case PN533_POLL_MOD_847KBPS_B:
912 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
916 "Unknown current poll modulation\n");
923 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
925 "The Tg found doesn't have the desired protocol\n");
930 "Target found - supported protocols: 0x%x\n",
931 nfc_tgt.supported_protocols);
933 dev->tgt_available_prots = nfc_tgt.supported_protocols;
935 pn533_poll_reset_mod_list(dev);
936 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
941 static inline void pn533_poll_next_mod(struct pn533 *dev)
943 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
946 static void pn533_poll_reset_mod_list(struct pn533 *dev)
948 dev->poll_mod_count = 0;
951 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
953 dev->poll_mod_active[dev->poll_mod_count] =
954 (struct pn533_poll_modulations *)&poll_mod[mod_index];
955 dev->poll_mod_count++;
958 static void pn533_poll_create_mod_list(struct pn533 *dev,
959 u32 im_protocols, u32 tm_protocols)
961 pn533_poll_reset_mod_list(dev);
963 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
964 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
965 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
966 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
968 if (im_protocols & NFC_PROTO_FELICA_MASK ||
969 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
970 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
971 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
974 if (im_protocols & NFC_PROTO_JEWEL_MASK)
975 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
977 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
978 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
981 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
984 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
986 u8 nbtg, tg, *tgdata;
989 /* Toggle the DEP polling */
990 if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
993 nbtg = resp->data[0];
995 tgdata = &resp->data[2];
996 tgdata_len = resp->len - 2; /* nbtg + tg */
999 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1001 /* We must stop the poll after a valid target found */
1009 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1011 struct sk_buff *skb;
1012 u8 *felica, *nfcid3;
1014 u8 *gbytes = dev->gb;
1015 size_t gbytes_len = dev->gb_len;
1017 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1018 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1019 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1020 0xff, 0xff}; /* System code */
1022 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1024 0x40}; /* SEL_RES for DEP */
1026 unsigned int skb_len = 36 + /*
1027 * mode (1), mifare (6),
1028 * felica (18), nfcid3 (10), gb_len (1)
1033 skb = pn533_alloc_skb(dev, skb_len);
1037 /* DEP support only */
1038 skb_put_u8(skb, PN533_INIT_TARGET_DEP);
1041 skb_put_data(skb, mifare_params, 6);
1044 felica = skb_put_data(skb, felica_params, 18);
1045 get_random_bytes(felica + 2, 6);
1048 nfcid3 = skb_put_zero(skb, 10);
1049 memcpy(nfcid3, felica, 8);
1052 skb_put_u8(skb, gbytes_len);
1054 skb_put_data(skb, gbytes, gbytes_len);
1062 static void pn533_wq_tm_mi_recv(struct work_struct *work);
1063 static struct sk_buff *pn533_build_response(struct pn533 *dev);
1065 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1066 struct sk_buff *resp)
1068 struct sk_buff *skb;
1072 dev_dbg(dev->dev, "%s\n", __func__);
1075 skb_queue_purge(&dev->resp_q);
1076 return PTR_ERR(resp);
1079 status = resp->data[0];
1081 ret = status & PN533_CMD_RET_MASK;
1082 mi = status & PN533_CMD_MI_MASK;
1084 skb_pull(resp, sizeof(status));
1086 if (ret != PN533_CMD_RET_SUCCESS) {
1091 skb_queue_tail(&dev->resp_q, resp);
1094 queue_work(dev->wq, &dev->mi_tm_rx_work);
1095 return -EINPROGRESS;
1098 skb = pn533_build_response(dev);
1104 return nfc_tm_data_received(dev->nfc_dev, skb);
1107 nfc_tm_deactivated(dev->nfc_dev);
1109 skb_queue_purge(&dev->resp_q);
1110 dev_kfree_skb(resp);
1115 static void pn533_wq_tm_mi_recv(struct work_struct *work)
1117 struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1118 struct sk_buff *skb;
1121 dev_dbg(dev->dev, "%s\n", __func__);
1123 skb = pn533_alloc_skb(dev, 0);
1127 rc = pn533_send_cmd_direct_async(dev,
1128 PN533_CMD_TG_GET_DATA,
1130 pn533_tm_get_data_complete,
1137 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1138 struct sk_buff *resp);
1139 static void pn533_wq_tm_mi_send(struct work_struct *work)
1141 struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1142 struct sk_buff *skb;
1145 dev_dbg(dev->dev, "%s\n", __func__);
1147 /* Grab the first skb in the queue */
1148 skb = skb_dequeue(&dev->fragment_skb);
1149 if (skb == NULL) { /* No more data */
1150 /* Reset the queue for future use */
1151 skb_queue_head_init(&dev->fragment_skb);
1155 /* last entry - remove MI bit */
1156 if (skb_queue_len(&dev->fragment_skb) == 0) {
1157 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1158 skb, pn533_tm_send_complete, NULL);
1160 rc = pn533_send_cmd_direct_async(dev,
1161 PN533_CMD_TG_SET_META_DATA,
1162 skb, pn533_tm_send_complete, NULL);
1164 if (rc == 0) /* success */
1168 "Error %d when trying to perform set meta data_exchange", rc);
1173 dev->phy_ops->send_ack(dev, GFP_KERNEL);
1174 queue_work(dev->wq, &dev->cmd_work);
1177 static void pn533_wq_tg_get_data(struct work_struct *work)
1179 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1180 struct sk_buff *skb;
1183 dev_dbg(dev->dev, "%s\n", __func__);
1185 skb = pn533_alloc_skb(dev, 0);
1189 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1190 pn533_tm_get_data_complete, NULL);
1196 #define ATR_REQ_GB_OFFSET 17
1197 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1199 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1203 dev_dbg(dev->dev, "%s\n", __func__);
1205 if (resp->len < ATR_REQ_GB_OFFSET + 1)
1208 mode = resp->data[0];
1209 cmd = &resp->data[1];
1211 dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
1214 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1215 PN533_INIT_TARGET_RESP_ACTIVE)
1216 comm_mode = NFC_COMM_ACTIVE;
1218 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
1221 gb = cmd + ATR_REQ_GB_OFFSET;
1222 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1224 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1225 comm_mode, gb, gb_len);
1228 "Error when signaling target activation\n");
1233 queue_work(dev->wq, &dev->tg_work);
1238 static void pn533_listen_mode_timer(unsigned long data)
1240 struct pn533 *dev = (struct pn533 *)data;
1242 dev_dbg(dev->dev, "Listen mode timeout\n");
1244 dev->cancel_listen = 1;
1246 pn533_poll_next_mod(dev);
1248 queue_delayed_work(dev->wq, &dev->poll_work,
1249 msecs_to_jiffies(PN533_POLL_INTERVAL));
1252 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1253 struct sk_buff *resp)
1257 dev_dbg(dev->dev, "%s\n", __func__);
1262 nfc_err(dev->dev, "RF setting error %d\n", rc);
1267 queue_delayed_work(dev->wq, &dev->poll_work,
1268 msecs_to_jiffies(PN533_POLL_INTERVAL));
1270 dev_kfree_skb(resp);
1274 static void pn533_wq_rf(struct work_struct *work)
1276 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1277 struct sk_buff *skb;
1280 dev_dbg(dev->dev, "%s\n", __func__);
1282 skb = pn533_alloc_skb(dev, 2);
1286 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
1287 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
1289 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1290 pn533_rf_complete, NULL);
1293 nfc_err(dev->dev, "RF setting error %d\n", rc);
1297 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1298 struct sk_buff *resp)
1300 struct pn533_cmd_jump_dep_response *rsp;
1301 struct nfc_target nfc_target;
1306 return PTR_ERR(resp);
1308 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1310 rc = rsp->status & PN533_CMD_RET_MASK;
1311 if (rc != PN533_CMD_RET_SUCCESS) {
1312 /* Not target found, turn radio off */
1313 queue_work(dev->wq, &dev->rf_work);
1315 dev_kfree_skb(resp);
1319 dev_dbg(dev->dev, "Creating new target");
1321 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1322 nfc_target.nfcid1_len = 10;
1323 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1324 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1328 dev->tgt_available_prots = 0;
1329 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1331 /* ATR_RES general bytes are located at offset 17 */
1332 target_gt_len = resp->len - 17;
1333 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1334 rsp->gt, target_gt_len);
1336 rc = nfc_dep_link_is_up(dev->nfc_dev,
1337 dev->nfc_dev->targets[0].idx,
1338 0, NFC_RF_INITIATOR);
1341 pn533_poll_reset_mod_list(dev);
1344 dev_kfree_skb(resp);
1348 #define PASSIVE_DATA_LEN 5
1349 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1351 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1352 struct sk_buff *skb;
1354 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1355 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1357 dev_dbg(dev->dev, "%s", __func__);
1360 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1362 if (!dev->gb || !dev->gb_len) {
1364 queue_work(dev->wq, &dev->rf_work);
1368 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1369 skb_len += PASSIVE_DATA_LEN;
1372 skb_len += NFC_NFCID3_MAXSIZE;
1375 get_random_bytes(nfcid3 + 2, 6);
1377 skb = pn533_alloc_skb(dev, skb_len);
1381 skb_put_u8(skb, 0x01); /* Active */
1382 skb_put_u8(skb, 0x02); /* 424 kbps */
1384 next = skb_put(skb, 1); /* Next */
1387 /* Copy passive data */
1388 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1391 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1392 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1395 skb_put_data(skb, dev->gb, dev->gb_len);
1396 *next |= 4; /* We have some Gi */
1398 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1399 pn533_poll_dep_complete, NULL);
1407 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1408 struct sk_buff *resp)
1410 struct pn533_poll_modulations *cur_mod;
1413 dev_dbg(dev->dev, "%s\n", __func__);
1418 nfc_err(dev->dev, "%s Poll complete error %d\n",
1421 if (rc == -ENOENT) {
1422 if (dev->poll_mod_count != 0)
1425 } else if (rc < 0) {
1427 "Error %d when running poll\n", rc);
1432 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1434 if (cur_mod->len == 0) { /* Target mode */
1435 del_timer(&dev->listen_timer);
1436 rc = pn533_init_target_complete(dev, resp);
1440 /* Initiator mode */
1441 rc = pn533_start_poll_complete(dev, resp);
1445 if (!dev->poll_mod_count) {
1446 dev_dbg(dev->dev, "Polling has been stopped\n");
1450 pn533_poll_next_mod(dev);
1451 /* Not target found, turn radio off */
1452 queue_work(dev->wq, &dev->rf_work);
1455 dev_kfree_skb(resp);
1459 nfc_err(dev->dev, "Polling operation has been stopped\n");
1461 pn533_poll_reset_mod_list(dev);
1462 dev->poll_protocols = 0;
1466 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1467 struct pn533_poll_modulations *mod)
1469 struct sk_buff *skb;
1471 skb = pn533_alloc_skb(dev, mod->len);
1475 skb_put_data(skb, &mod->data, mod->len);
1480 static int pn533_send_poll_frame(struct pn533 *dev)
1482 struct pn533_poll_modulations *mod;
1483 struct sk_buff *skb;
1487 mod = dev->poll_mod_active[dev->poll_mod_curr];
1489 dev_dbg(dev->dev, "%s mod len %d\n",
1490 __func__, mod->len);
1492 if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) {
1494 return pn533_poll_dep(dev->nfc_dev);
1497 if (mod->len == 0) { /* Listen mode */
1498 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1499 skb = pn533_alloc_poll_tg_frame(dev);
1500 } else { /* Polling mode */
1501 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
1502 skb = pn533_alloc_poll_in_frame(dev, mod);
1506 nfc_err(dev->dev, "Failed to allocate skb\n");
1510 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1514 nfc_err(dev->dev, "Polling loop error %d\n", rc);
1520 static void pn533_wq_poll(struct work_struct *work)
1522 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
1523 struct pn533_poll_modulations *cur_mod;
1526 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1529 "%s cancel_listen %d modulation len %d\n",
1530 __func__, dev->cancel_listen, cur_mod->len);
1532 if (dev->cancel_listen == 1) {
1533 dev->cancel_listen = 0;
1534 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
1537 rc = pn533_send_poll_frame(dev);
1541 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1542 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1545 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1546 u32 im_protocols, u32 tm_protocols)
1548 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1549 struct pn533_poll_modulations *cur_mod;
1554 "%s: im protocols 0x%x tm protocols 0x%x\n",
1555 __func__, im_protocols, tm_protocols);
1557 if (dev->tgt_active_prot) {
1559 "Cannot poll with a target already activated\n");
1563 if (dev->tgt_mode) {
1565 "Cannot poll while already being activated\n");
1570 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1571 if (dev->gb == NULL)
1575 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1576 dev->poll_protocols = im_protocols;
1577 dev->listen_protocols = tm_protocols;
1579 /* Do not always start polling from the same modulation */
1580 get_random_bytes(&rand_mod, sizeof(rand_mod));
1581 rand_mod %= dev->poll_mod_count;
1582 dev->poll_mod_curr = rand_mod;
1584 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1586 rc = pn533_send_poll_frame(dev);
1588 /* Start listen timer */
1589 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
1590 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1595 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1597 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1599 del_timer(&dev->listen_timer);
1601 if (!dev->poll_mod_count) {
1603 "Polling operation was not running\n");
1607 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
1608 flush_delayed_work(&dev->poll_work);
1609 pn533_poll_reset_mod_list(dev);
1612 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1614 struct pn533_cmd_activate_response *rsp;
1617 struct sk_buff *skb;
1618 struct sk_buff *resp;
1620 dev_dbg(dev->dev, "%s\n", __func__);
1622 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1626 skb_put_u8(skb, 1); /* TG */
1627 skb_put_u8(skb, 0); /* Next */
1629 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1631 return PTR_ERR(resp);
1633 rsp = (struct pn533_cmd_activate_response *)resp->data;
1634 rc = rsp->status & PN533_CMD_RET_MASK;
1635 if (rc != PN533_CMD_RET_SUCCESS) {
1637 "Target activation failed (error 0x%x)\n", rc);
1638 dev_kfree_skb(resp);
1642 /* ATR_RES general bytes are located at offset 16 */
1643 gt_len = resp->len - 16;
1644 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1646 dev_kfree_skb(resp);
1650 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1651 struct nfc_target *target, u32 protocol)
1653 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1656 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
1658 if (dev->poll_mod_count) {
1660 "Cannot activate while polling\n");
1664 if (dev->tgt_active_prot) {
1666 "There is already an active target\n");
1670 if (!dev->tgt_available_prots) {
1672 "There is no available target to activate\n");
1676 if (!(dev->tgt_available_prots & (1 << protocol))) {
1678 "Target doesn't support requested proto %u\n",
1683 if (protocol == NFC_PROTO_NFC_DEP) {
1684 rc = pn533_activate_target_nfcdep(dev);
1687 "Activating target with DEP failed %d\n", rc);
1692 dev->tgt_active_prot = protocol;
1693 dev->tgt_available_prots = 0;
1698 static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
1699 struct sk_buff *resp)
1703 dev_dbg(dev->dev, "%s\n", __func__);
1708 nfc_err(dev->dev, "Target release error %d\n", rc);
1713 rc = resp->data[0] & PN533_CMD_RET_MASK;
1714 if (rc != PN533_CMD_RET_SUCCESS)
1716 "Error 0x%x when releasing the target\n", rc);
1718 dev_kfree_skb(resp);
1722 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1723 struct nfc_target *target, u8 mode)
1725 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1726 struct sk_buff *skb;
1729 dev_dbg(dev->dev, "%s\n", __func__);
1731 if (!dev->tgt_active_prot) {
1732 nfc_err(dev->dev, "There is no active target\n");
1736 dev->tgt_active_prot = 0;
1737 skb_queue_purge(&dev->resp_q);
1739 skb = pn533_alloc_skb(dev, sizeof(u8));
1743 skb_put_u8(skb, 1); /* TG*/
1745 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1746 pn533_deactivate_target_complete, NULL);
1749 nfc_err(dev->dev, "Target release error %d\n", rc);
1754 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1755 struct sk_buff *resp)
1757 struct pn533_cmd_jump_dep_response *rsp;
1760 u8 active = *(u8 *)arg;
1765 return PTR_ERR(resp);
1767 if (dev->tgt_available_prots &&
1768 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1770 "The target does not support DEP\n");
1775 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1777 rc = rsp->status & PN533_CMD_RET_MASK;
1778 if (rc != PN533_CMD_RET_SUCCESS) {
1780 "Bringing DEP link up failed (error 0x%x)\n", rc);
1784 if (!dev->tgt_available_prots) {
1785 struct nfc_target nfc_target;
1787 dev_dbg(dev->dev, "Creating new target\n");
1789 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1790 nfc_target.nfcid1_len = 10;
1791 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1792 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1796 dev->tgt_available_prots = 0;
1799 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1801 /* ATR_RES general bytes are located at offset 17 */
1802 target_gt_len = resp->len - 17;
1803 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1804 rsp->gt, target_gt_len);
1806 rc = nfc_dep_link_is_up(dev->nfc_dev,
1807 dev->nfc_dev->targets[0].idx,
1808 !active, NFC_RF_INITIATOR);
1811 dev_kfree_skb(resp);
1815 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
1816 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1817 u8 comm_mode, u8 *gb, size_t gb_len)
1819 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1820 struct sk_buff *skb;
1822 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
1823 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1825 dev_dbg(dev->dev, "%s\n", __func__);
1827 if (dev->poll_mod_count) {
1829 "Cannot bring the DEP link up while polling\n");
1833 if (dev->tgt_active_prot) {
1835 "There is already an active target\n");
1839 skb_len = 3 + gb_len; /* ActPass + BR + Next */
1840 skb_len += PASSIVE_DATA_LEN;
1843 skb_len += NFC_NFCID3_MAXSIZE;
1844 if (target && !target->nfcid2_len) {
1847 get_random_bytes(nfcid3 + 2, 6);
1850 skb = pn533_alloc_skb(dev, skb_len);
1854 skb_put_u8(skb, !comm_mode); /* ActPass */
1855 skb_put_u8(skb, 0x02); /* 424 kbps */
1857 next = skb_put(skb, 1); /* Next */
1860 /* Copy passive data */
1861 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1864 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1865 if (target && target->nfcid2_len)
1866 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
1867 target->nfcid2_len);
1869 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1872 if (gb != NULL && gb_len > 0) {
1873 skb_put_data(skb, gb, gb_len);
1874 *next |= 4; /* We have some Gi */
1879 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1887 pn533_rf_field(dev->nfc_dev, 0);
1889 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1890 pn533_in_dep_link_up_complete, arg);
1900 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1902 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1904 dev_dbg(dev->dev, "%s\n", __func__);
1906 pn533_poll_reset_mod_list(dev);
1908 if (dev->tgt_mode || dev->tgt_active_prot)
1909 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
1911 dev->tgt_active_prot = 0;
1914 skb_queue_purge(&dev->resp_q);
1919 struct pn533_data_exchange_arg {
1920 data_exchange_cb_t cb;
1924 static struct sk_buff *pn533_build_response(struct pn533 *dev)
1926 struct sk_buff *skb, *tmp, *t;
1927 unsigned int skb_len = 0, tmp_len = 0;
1929 dev_dbg(dev->dev, "%s\n", __func__);
1931 if (skb_queue_empty(&dev->resp_q))
1934 if (skb_queue_len(&dev->resp_q) == 1) {
1935 skb = skb_dequeue(&dev->resp_q);
1939 skb_queue_walk_safe(&dev->resp_q, tmp, t)
1940 skb_len += tmp->len;
1942 dev_dbg(dev->dev, "%s total length %d\n",
1945 skb = alloc_skb(skb_len, GFP_KERNEL);
1949 skb_put(skb, skb_len);
1951 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1952 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1953 tmp_len += tmp->len;
1957 skb_queue_purge(&dev->resp_q);
1962 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1963 struct sk_buff *resp)
1965 struct pn533_data_exchange_arg *arg = _arg;
1966 struct sk_buff *skb;
1970 dev_dbg(dev->dev, "%s\n", __func__);
1977 status = resp->data[0];
1978 ret = status & PN533_CMD_RET_MASK;
1979 mi = status & PN533_CMD_MI_MASK;
1981 skb_pull(resp, sizeof(status));
1983 if (ret != PN533_CMD_RET_SUCCESS) {
1985 "Exchanging data failed (error 0x%x)\n", ret);
1990 skb_queue_tail(&dev->resp_q, resp);
1993 dev->cmd_complete_mi_arg = arg;
1994 queue_work(dev->wq, &dev->mi_rx_work);
1995 return -EINPROGRESS;
1998 /* Prepare for the next round */
1999 if (skb_queue_len(&dev->fragment_skb) > 0) {
2000 dev->cmd_complete_dep_arg = arg;
2001 queue_work(dev->wq, &dev->mi_tx_work);
2003 return -EINPROGRESS;
2006 skb = pn533_build_response(dev);
2012 arg->cb(arg->cb_context, skb, 0);
2017 dev_kfree_skb(resp);
2019 skb_queue_purge(&dev->resp_q);
2020 arg->cb(arg->cb_context, NULL, rc);
2026 * Receive an incoming pn533 frame. skb contains only header and payload.
2027 * If skb == NULL, it is a notification that the link below is dead.
2029 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2034 dev->cmd->status = status;
2037 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2042 pr_err("NULL Frame -> link is dead\n");
2046 if (pn533_rx_frame_is_ack(skb->data)) {
2047 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2052 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2053 dev->ops->rx_frame_size(skb->data), false);
2055 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2056 nfc_err(dev->dev, "Received an invalid frame\n");
2057 dev->cmd->status = -EIO;
2058 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2059 nfc_err(dev->dev, "It it not the response to the last command\n");
2060 dev->cmd->status = -EIO;
2063 dev->cmd->resp = skb;
2066 queue_work(dev->wq, &dev->cmd_complete_work);
2068 EXPORT_SYMBOL(pn533_recv_frame);
2070 /* Split the Tx skb into small chunks */
2071 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2073 struct sk_buff *frag;
2077 /* Remaining size */
2078 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2079 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2081 frag_size = skb->len;
2083 /* Allocate and reserve */
2084 frag = pn533_alloc_skb(dev, frag_size);
2086 skb_queue_purge(&dev->fragment_skb);
2090 if (!dev->tgt_mode) {
2091 /* Reserve the TG/MI byte */
2092 skb_reserve(frag, 1);
2095 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2096 *(u8 *)skb_push(frag, sizeof(u8)) =
2097 (PN533_CMD_MI_MASK | 1);
2099 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */
2102 skb_put_data(frag, skb->data, frag_size);
2104 /* Reduce the size of incoming buffer */
2105 skb_pull(skb, frag_size);
2107 /* Add this to skb_queue */
2108 skb_queue_tail(&dev->fragment_skb, frag);
2110 } while (skb->len > 0);
2114 return skb_queue_len(&dev->fragment_skb);
2117 static int pn533_transceive(struct nfc_dev *nfc_dev,
2118 struct nfc_target *target, struct sk_buff *skb,
2119 data_exchange_cb_t cb, void *cb_context)
2121 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2122 struct pn533_data_exchange_arg *arg = NULL;
2125 dev_dbg(dev->dev, "%s\n", __func__);
2127 if (!dev->tgt_active_prot) {
2129 "Can't exchange data if there is no active target\n");
2134 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2141 arg->cb_context = cb_context;
2143 switch (dev->device_type) {
2144 case PN533_DEVICE_PASORI:
2145 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2146 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2148 pn533_data_exchange_complete,
2155 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2156 rc = pn533_fill_fragment_skbs(dev, skb);
2160 skb = skb_dequeue(&dev->fragment_skb);
2166 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */
2169 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2170 skb, pn533_data_exchange_complete,
2176 if (rc < 0) /* rc from send_async */
2187 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2188 struct sk_buff *resp)
2192 dev_dbg(dev->dev, "%s\n", __func__);
2195 return PTR_ERR(resp);
2197 status = resp->data[0];
2199 /* Prepare for the next round */
2200 if (skb_queue_len(&dev->fragment_skb) > 0) {
2201 queue_work(dev->wq, &dev->mi_tm_tx_work);
2202 return -EINPROGRESS;
2204 dev_kfree_skb(resp);
2207 nfc_tm_deactivated(dev->nfc_dev);
2214 queue_work(dev->wq, &dev->tg_work);
2219 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2221 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2224 dev_dbg(dev->dev, "%s\n", __func__);
2226 /* let's split in multiple chunks if size's too big */
2227 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2228 rc = pn533_fill_fragment_skbs(dev, skb);
2232 /* get the first skb */
2233 skb = skb_dequeue(&dev->fragment_skb);
2239 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2240 pn533_tm_send_complete, NULL);
2243 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2244 pn533_tm_send_complete, NULL);
2250 skb_queue_purge(&dev->fragment_skb);
2256 static void pn533_wq_mi_recv(struct work_struct *work)
2258 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2259 struct sk_buff *skb;
2262 dev_dbg(dev->dev, "%s\n", __func__);
2264 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2268 switch (dev->device_type) {
2269 case PN533_DEVICE_PASORI:
2270 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2271 rc = pn533_send_cmd_direct_async(dev,
2272 PN533_CMD_IN_COMM_THRU,
2274 pn533_data_exchange_complete,
2275 dev->cmd_complete_mi_arg);
2280 skb_put_u8(skb, 1); /*TG*/
2282 rc = pn533_send_cmd_direct_async(dev,
2283 PN533_CMD_IN_DATA_EXCHANGE,
2285 pn533_data_exchange_complete,
2286 dev->cmd_complete_mi_arg);
2291 if (rc == 0) /* success */
2295 "Error %d when trying to perform data_exchange\n", rc);
2298 kfree(dev->cmd_complete_mi_arg);
2301 dev->phy_ops->send_ack(dev, GFP_KERNEL);
2302 queue_work(dev->wq, &dev->cmd_work);
2305 static void pn533_wq_mi_send(struct work_struct *work)
2307 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2308 struct sk_buff *skb;
2311 dev_dbg(dev->dev, "%s\n", __func__);
2313 /* Grab the first skb in the queue */
2314 skb = skb_dequeue(&dev->fragment_skb);
2316 if (skb == NULL) { /* No more data */
2317 /* Reset the queue for future use */
2318 skb_queue_head_init(&dev->fragment_skb);
2322 switch (dev->device_type) {
2323 case PN533_DEVICE_PASORI:
2324 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2329 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2331 pn533_data_exchange_complete,
2332 dev->cmd_complete_dep_arg);
2337 /* Still some fragments? */
2338 rc = pn533_send_cmd_direct_async(dev,
2339 PN533_CMD_IN_DATA_EXCHANGE,
2341 pn533_data_exchange_complete,
2342 dev->cmd_complete_dep_arg);
2347 if (rc == 0) /* success */
2351 "Error %d when trying to perform data_exchange\n", rc);
2354 kfree(dev->cmd_complete_dep_arg);
2357 dev->phy_ops->send_ack(dev, GFP_KERNEL);
2358 queue_work(dev->wq, &dev->cmd_work);
2361 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2364 struct sk_buff *skb;
2365 struct sk_buff *resp;
2368 dev_dbg(dev->dev, "%s\n", __func__);
2370 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2372 skb = pn533_alloc_skb(dev, skb_len);
2376 skb_put_u8(skb, cfgitem);
2377 skb_put_data(skb, cfgdata, cfgdata_len);
2379 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2381 return PTR_ERR(resp);
2383 dev_kfree_skb(resp);
2387 static int pn533_get_firmware_version(struct pn533 *dev,
2388 struct pn533_fw_version *fv)
2390 struct sk_buff *skb;
2391 struct sk_buff *resp;
2393 skb = pn533_alloc_skb(dev, 0);
2397 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2399 return PTR_ERR(resp);
2401 fv->ic = resp->data[0];
2402 fv->ver = resp->data[1];
2403 fv->rev = resp->data[2];
2404 fv->support = resp->data[3];
2406 dev_kfree_skb(resp);
2410 static int pn533_pasori_fw_reset(struct pn533 *dev)
2412 struct sk_buff *skb;
2413 struct sk_buff *resp;
2415 dev_dbg(dev->dev, "%s\n", __func__);
2417 skb = pn533_alloc_skb(dev, sizeof(u8));
2421 skb_put_u8(skb, 0x1);
2423 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2425 return PTR_ERR(resp);
2427 dev_kfree_skb(resp);
2432 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2434 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2438 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2440 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2441 (u8 *)&rf_field, 1);
2443 nfc_err(dev->dev, "Error on setting RF field\n");
2450 static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2452 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2453 struct sk_buff *skb;
2454 struct sk_buff *resp;
2456 skb = pn533_alloc_skb(dev, 1);
2460 skb_put_u8(skb, 0x01);
2462 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2464 return PTR_ERR(resp);
2466 dev_kfree_skb(resp);
2470 static int pn533_dev_up(struct nfc_dev *nfc_dev)
2472 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2474 if (dev->device_type == PN533_DEVICE_PN532) {
2475 int rc = pn532_sam_configuration(nfc_dev);
2481 return pn533_rf_field(nfc_dev, 1);
2484 static int pn533_dev_down(struct nfc_dev *nfc_dev)
2486 return pn533_rf_field(nfc_dev, 0);
2489 static struct nfc_ops pn533_nfc_ops = {
2490 .dev_up = pn533_dev_up,
2491 .dev_down = pn533_dev_down,
2492 .dep_link_up = pn533_dep_link_up,
2493 .dep_link_down = pn533_dep_link_down,
2494 .start_poll = pn533_start_poll,
2495 .stop_poll = pn533_stop_poll,
2496 .activate_target = pn533_activate_target,
2497 .deactivate_target = pn533_deactivate_target,
2498 .im_transceive = pn533_transceive,
2499 .tm_send = pn533_tm_send,
2502 static int pn533_setup(struct pn533 *dev)
2504 struct pn533_config_max_retries max_retries;
2505 struct pn533_config_timing timing;
2506 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2509 switch (dev->device_type) {
2510 case PN533_DEVICE_STD:
2511 case PN533_DEVICE_PASORI:
2512 case PN533_DEVICE_ACR122U:
2513 case PN533_DEVICE_PN532:
2514 max_retries.mx_rty_atr = 0x2;
2515 max_retries.mx_rty_psl = 0x1;
2516 max_retries.mx_rty_passive_act =
2517 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2519 timing.rfu = PN533_CONFIG_TIMING_102;
2520 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2521 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2526 nfc_err(dev->dev, "Unknown device type %d\n",
2531 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2532 (u8 *)&max_retries, sizeof(max_retries));
2535 "Error on setting MAX_RETRIES config\n");
2540 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2541 (u8 *)&timing, sizeof(timing));
2543 nfc_err(dev->dev, "Error on setting RF timings\n");
2547 switch (dev->device_type) {
2548 case PN533_DEVICE_STD:
2549 case PN533_DEVICE_PN532:
2552 case PN533_DEVICE_PASORI:
2553 pn533_pasori_fw_reset(dev);
2555 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2559 "Error while settings PASORI config\n");
2563 pn533_pasori_fw_reset(dev);
2571 int pn533_finalize_setup(struct pn533 *dev)
2574 struct pn533_fw_version fw_ver;
2577 memset(&fw_ver, 0, sizeof(fw_ver));
2579 rc = pn533_get_firmware_version(dev, &fw_ver);
2581 nfc_err(dev->dev, "Unable to get FW version\n");
2585 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2586 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2588 rc = pn533_setup(dev);
2594 EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2596 struct pn533 *pn533_register_device(u32 device_type,
2598 enum pn533_protocol_type protocol_type,
2600 struct pn533_phy_ops *phy_ops,
2601 struct pn533_frame_ops *fops,
2603 struct device *parent)
2608 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2610 return ERR_PTR(-ENOMEM);
2613 priv->phy_ops = phy_ops;
2618 priv->ops = &pn533_std_frame_ops;
2620 priv->protocol_type = protocol_type;
2621 priv->device_type = device_type;
2623 mutex_init(&priv->cmd_lock);
2625 INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2626 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2627 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2628 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2629 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2630 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2631 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2632 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2633 INIT_WORK(&priv->rf_work, pn533_wq_rf);
2634 priv->wq = alloc_ordered_workqueue("pn533", 0);
2635 if (priv->wq == NULL)
2638 init_timer(&priv->listen_timer);
2639 priv->listen_timer.data = (unsigned long) priv;
2640 priv->listen_timer.function = pn533_listen_mode_timer;
2642 skb_queue_head_init(&priv->resp_q);
2643 skb_queue_head_init(&priv->fragment_skb);
2645 INIT_LIST_HEAD(&priv->cmd_queue);
2647 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2648 priv->ops->tx_header_len +
2649 PN533_CMD_DATAEXCH_HEAD_LEN,
2650 priv->ops->tx_tail_len);
2651 if (!priv->nfc_dev) {
2656 nfc_set_parent_dev(priv->nfc_dev, parent);
2657 nfc_set_drvdata(priv->nfc_dev, priv);
2659 rc = nfc_register_device(priv->nfc_dev);
2666 nfc_free_device(priv->nfc_dev);
2669 destroy_workqueue(priv->wq);
2674 EXPORT_SYMBOL_GPL(pn533_register_device);
2676 void pn533_unregister_device(struct pn533 *priv)
2678 struct pn533_cmd *cmd, *n;
2680 nfc_unregister_device(priv->nfc_dev);
2681 nfc_free_device(priv->nfc_dev);
2683 flush_delayed_work(&priv->poll_work);
2684 destroy_workqueue(priv->wq);
2686 skb_queue_purge(&priv->resp_q);
2688 del_timer(&priv->listen_timer);
2690 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
2691 list_del(&cmd->queue);
2697 EXPORT_SYMBOL_GPL(pn533_unregister_device);
2700 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2701 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2702 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2703 MODULE_DESCRIPTION("PN533 driver ver " VERSION);
2704 MODULE_VERSION(VERSION);
2705 MODULE_LICENSE("GPL");