2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 * Copyright (C) 2012-2013 Tieto Poland
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #include <linux/device.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/slab.h>
23 #include <linux/usb.h>
24 #include <linux/nfc.h>
25 #include <linux/netdevice.h>
26 #include <net/nfc/nfc.h>
30 #define PN533_VENDOR_ID 0x4CC
31 #define PN533_PRODUCT_ID 0x2533
33 #define SCM_VENDOR_ID 0x4E6
34 #define SCL3711_PRODUCT_ID 0x5591
36 #define SONY_VENDOR_ID 0x054c
37 #define PASORI_PRODUCT_ID 0x02e1
39 #define ACS_VENDOR_ID 0x072f
40 #define ACR122U_PRODUCT_ID 0x2200
42 #define PN533_DEVICE_STD 0x1
43 #define PN533_DEVICE_PASORI 0x2
44 #define PN533_DEVICE_ACR122U 0x3
46 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
47 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
48 NFC_PROTO_NFC_DEP_MASK |\
49 NFC_PROTO_ISO14443_B_MASK)
51 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
52 NFC_PROTO_MIFARE_MASK | \
53 NFC_PROTO_FELICA_MASK | \
54 NFC_PROTO_ISO14443_MASK | \
55 NFC_PROTO_NFC_DEP_MASK)
57 static const struct usb_device_id pn533_table[] = {
58 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
59 .idVendor = PN533_VENDOR_ID,
60 .idProduct = PN533_PRODUCT_ID,
61 .driver_info = PN533_DEVICE_STD,
63 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
64 .idVendor = SCM_VENDOR_ID,
65 .idProduct = SCL3711_PRODUCT_ID,
66 .driver_info = PN533_DEVICE_STD,
68 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
69 .idVendor = SONY_VENDOR_ID,
70 .idProduct = PASORI_PRODUCT_ID,
71 .driver_info = PN533_DEVICE_PASORI,
73 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
74 .idVendor = ACS_VENDOR_ID,
75 .idProduct = ACR122U_PRODUCT_ID,
76 .driver_info = PN533_DEVICE_ACR122U,
80 MODULE_DEVICE_TABLE(usb, pn533_table);
82 /* How much time we spend listening for initiators */
83 #define PN533_LISTEN_TIME 2
84 /* Delay between each poll frame (ms) */
85 #define PN533_POLL_INTERVAL 10
87 /* Standard pn533 frame definitions (standard and extended)*/
88 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
89 + 2) /* data[0] TFI, data[1] CC */
90 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
92 #define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
93 + 2) /* data[0] TFI, data[1] CC */
95 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
96 #define PN533_CMD_DATAFRAME_MAXLEN 240 /* max data length (send) */
99 * Max extended frame payload len, excluding TFI and CC
100 * which are already in PN533_FRAME_HEADER_LEN.
102 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
104 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
106 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
107 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
108 /* Half start code (3), LEN (4) should be 0xffff for extended frame */
109 #define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
110 && (hdr)->datalen_checksum == 0xFF)
111 #define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
114 #define PN533_STD_FRAME_SOF 0x00FF
116 /* standard frame identifier: in/out/error */
117 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
118 #define PN533_STD_FRAME_DIR_OUT 0xD4
119 #define PN533_STD_FRAME_DIR_IN 0xD5
121 /* ACS ACR122 pn533 frame definitions */
122 #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
124 #define PN533_ACR122_TX_FRAME_TAIL_LEN 0
125 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
127 #define PN533_ACR122_RX_FRAME_TAIL_LEN 2
128 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
130 /* CCID messages types */
131 #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
132 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
134 #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
137 #define PN533_FRAME_CMD(f) (f->data[1])
139 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
140 #define PN533_CMD_RF_CONFIGURATION 0x32
141 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
142 #define PN533_CMD_IN_COMM_THRU 0x42
143 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
144 #define PN533_CMD_IN_ATR 0x50
145 #define PN533_CMD_IN_RELEASE 0x52
146 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
148 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
149 #define PN533_CMD_TG_GET_DATA 0x86
150 #define PN533_CMD_TG_SET_DATA 0x8e
151 #define PN533_CMD_TG_SET_META_DATA 0x94
152 #define PN533_CMD_UNDEF 0xff
154 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
156 /* PN533 Return codes */
157 #define PN533_CMD_RET_MASK 0x3F
158 #define PN533_CMD_MI_MASK 0x40
159 #define PN533_CMD_RET_SUCCESS 0x00
163 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
164 struct sk_buff *resp);
166 /* structs for pn533 commands */
168 /* PN533_CMD_GET_FIRMWARE_VERSION */
169 struct pn533_fw_version {
176 /* PN533_CMD_RF_CONFIGURATION */
177 #define PN533_CFGITEM_RF_FIELD 0x01
178 #define PN533_CFGITEM_TIMING 0x02
179 #define PN533_CFGITEM_MAX_RETRIES 0x05
180 #define PN533_CFGITEM_PASORI 0x82
182 #define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
183 #define PN533_CFGITEM_RF_FIELD_ON 0x1
184 #define PN533_CFGITEM_RF_FIELD_OFF 0x0
186 #define PN533_CONFIG_TIMING_102 0xb
187 #define PN533_CONFIG_TIMING_204 0xc
188 #define PN533_CONFIG_TIMING_409 0xd
189 #define PN533_CONFIG_TIMING_819 0xe
191 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
192 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
194 struct pn533_config_max_retries {
197 u8 mx_rty_passive_act;
200 struct pn533_config_timing {
206 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
208 /* felica commands opcode */
209 #define PN533_FELICA_OPC_SENSF_REQ 0
210 #define PN533_FELICA_OPC_SENSF_RES 1
211 /* felica SENSF_REQ parameters */
212 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
213 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
214 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
215 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
217 /* type B initiator_data values */
218 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
219 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
220 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
222 union pn533_cmd_poll_initdata {
235 /* Poll modulations */
237 PN533_POLL_MOD_106KBPS_A,
238 PN533_POLL_MOD_212KBPS_FELICA,
239 PN533_POLL_MOD_424KBPS_FELICA,
240 PN533_POLL_MOD_106KBPS_JEWEL,
241 PN533_POLL_MOD_847KBPS_B,
244 __PN533_POLL_MOD_AFTER_LAST,
246 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
248 struct pn533_poll_modulations {
252 union pn533_cmd_poll_initdata initiator_data;
257 static const struct pn533_poll_modulations poll_mod[] = {
258 [PN533_POLL_MOD_106KBPS_A] = {
265 [PN533_POLL_MOD_212KBPS_FELICA] = {
269 .initiator_data.felica = {
270 .opcode = PN533_FELICA_OPC_SENSF_REQ,
271 .sc = PN533_FELICA_SENSF_SC_ALL,
272 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
278 [PN533_POLL_MOD_424KBPS_FELICA] = {
282 .initiator_data.felica = {
283 .opcode = PN533_FELICA_OPC_SENSF_REQ,
284 .sc = PN533_FELICA_SENSF_SC_ALL,
285 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
291 [PN533_POLL_MOD_106KBPS_JEWEL] = {
298 [PN533_POLL_MOD_847KBPS_B] = {
302 .initiator_data.type_b = {
303 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
305 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
310 [PN533_LISTEN_MOD] = {
315 /* PN533_CMD_IN_ATR */
317 struct pn533_cmd_activate_response {
329 struct pn533_cmd_jump_dep_response {
343 /* PN533_TG_INIT_AS_TARGET */
344 #define PN533_INIT_TARGET_PASSIVE 0x1
345 #define PN533_INIT_TARGET_DEP 0x2
347 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
348 #define PN533_INIT_TARGET_RESP_ACTIVE 0x1
349 #define PN533_INIT_TARGET_RESP_DEP 0x4
351 enum pn533_protocol_type {
352 PN533_PROTO_REQ_ACK_RESP = 0,
357 struct usb_device *udev;
358 struct usb_interface *interface;
359 struct nfc_dev *nfc_dev;
361 enum pn533_protocol_type protocol_type;
366 struct sk_buff_head resp_q;
367 struct sk_buff_head fragment_skb;
369 struct workqueue_struct *wq;
370 struct work_struct cmd_work;
371 struct work_struct cmd_complete_work;
372 struct delayed_work poll_work;
373 struct work_struct mi_rx_work;
374 struct work_struct mi_tx_work;
375 struct work_struct mi_tm_rx_work;
376 struct work_struct mi_tm_tx_work;
377 struct work_struct tg_work;
378 struct work_struct rf_work;
380 struct list_head cmd_queue;
381 struct pn533_cmd *cmd;
383 struct mutex cmd_lock; /* protects cmd queue */
385 void *cmd_complete_mi_arg;
386 void *cmd_complete_dep_arg;
388 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
393 u32 listen_protocols;
394 struct timer_list listen_timer;
400 u8 tgt_available_prots;
404 struct pn533_frame_ops *ops;
408 struct list_head queue;
412 struct sk_buff *resp;
414 pn533_send_async_complete_t complete_cb;
415 void *complete_cb_context;
418 struct pn533_std_frame {
426 struct pn533_ext_frame { /* Extended Information frame */
429 __be16 eif_flag; /* fixed to 0xFFFF */
435 struct pn533_frame_ops {
436 void (*tx_frame_init)(void *frame, u8 cmd_code);
437 void (*tx_frame_finish)(void *frame);
438 void (*tx_update_payload_len)(void *frame, int len);
442 bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
443 int (*rx_frame_size)(void *frame);
448 u8 (*get_cmd_code)(void *frame);
451 struct pn533_acr122_ccid_hdr {
456 u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
457 byte for reposnse msg */
458 u8 data[]; /* payload */
461 struct pn533_acr122_apdu_hdr {
468 struct pn533_acr122_tx_frame {
469 struct pn533_acr122_ccid_hdr ccid;
470 struct pn533_acr122_apdu_hdr apdu;
472 u8 data[]; /* pn533 frame: TFI ... */
475 struct pn533_acr122_rx_frame {
476 struct pn533_acr122_ccid_hdr ccid;
477 u8 data[]; /* pn533 frame : TFI ... */
480 static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
482 struct pn533_acr122_tx_frame *frame = _frame;
484 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
485 frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
487 frame->ccid.slot = 0;
489 frame->ccid.params[0] = 0;
490 frame->ccid.params[1] = 0;
491 frame->ccid.params[2] = 0;
493 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
494 frame->data[1] = cmd_code;
495 frame->datalen = 2; /* data[0] + data[1] */
497 frame->apdu.class = 0xFF;
503 static void pn533_acr122_tx_frame_finish(void *_frame)
505 struct pn533_acr122_tx_frame *frame = _frame;
507 frame->ccid.datalen += frame->datalen;
510 static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
512 struct pn533_acr122_tx_frame *frame = _frame;
514 frame->datalen += len;
517 static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
519 struct pn533_acr122_rx_frame *frame = _frame;
521 if (frame->ccid.type != 0x83)
524 if (frame->data[frame->ccid.datalen - 2] == 0x63)
530 static int pn533_acr122_rx_frame_size(void *frame)
532 struct pn533_acr122_rx_frame *f = frame;
534 /* f->ccid.datalen already includes tail length */
535 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
538 static u8 pn533_acr122_get_cmd_code(void *frame)
540 struct pn533_acr122_rx_frame *f = frame;
542 return PN533_FRAME_CMD(f);
545 static struct pn533_frame_ops pn533_acr122_frame_ops = {
546 .tx_frame_init = pn533_acr122_tx_frame_init,
547 .tx_frame_finish = pn533_acr122_tx_frame_finish,
548 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
549 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
550 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
552 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
553 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
554 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
555 .rx_frame_size = pn533_acr122_rx_frame_size,
557 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
558 .get_cmd_code = pn533_acr122_get_cmd_code,
561 /* The rule: value(high byte) + value(low byte) + checksum = 0 */
562 static inline u8 pn533_ext_checksum(u16 value)
564 return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
567 /* The rule: value + checksum = 0 */
568 static inline u8 pn533_std_checksum(u8 value)
573 /* The rule: sum(data elements) + checksum = 0 */
574 static u8 pn533_std_data_checksum(u8 *data, int datalen)
579 for (i = 0; i < datalen; i++)
582 return pn533_std_checksum(sum);
585 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
587 struct pn533_std_frame *frame = _frame;
590 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
591 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
592 PN533_FRAME_CMD(frame) = cmd_code;
596 static void pn533_std_tx_frame_finish(void *_frame)
598 struct pn533_std_frame *frame = _frame;
600 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
602 PN533_STD_FRAME_CHECKSUM(frame) =
603 pn533_std_data_checksum(frame->data, frame->datalen);
605 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
608 static void pn533_std_tx_update_payload_len(void *_frame, int len)
610 struct pn533_std_frame *frame = _frame;
612 frame->datalen += len;
615 static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
618 struct pn533_std_frame *stdf = _frame;
620 if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
623 if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
624 /* Standard frame code */
625 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
627 checksum = pn533_std_checksum(stdf->datalen);
628 if (checksum != stdf->datalen_checksum)
631 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
632 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
636 struct pn533_ext_frame *eif = _frame;
638 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
640 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
641 if (checksum != eif->datalen_checksum)
644 /* check data checksum */
645 checksum = pn533_std_data_checksum(eif->data,
646 be16_to_cpu(eif->datalen));
647 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
654 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
656 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
659 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
665 static inline int pn533_std_rx_frame_size(void *frame)
667 struct pn533_std_frame *f = frame;
669 /* check for Extended Information frame */
670 if (PN533_STD_IS_EXTENDED(f)) {
671 struct pn533_ext_frame *eif = frame;
673 return sizeof(struct pn533_ext_frame)
674 + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
677 return sizeof(struct pn533_std_frame) + f->datalen +
678 PN533_STD_FRAME_TAIL_LEN;
681 static u8 pn533_std_get_cmd_code(void *frame)
683 struct pn533_std_frame *f = frame;
684 struct pn533_ext_frame *eif = frame;
686 if (PN533_STD_IS_EXTENDED(f))
687 return PN533_FRAME_CMD(eif);
689 return PN533_FRAME_CMD(f);
692 static struct pn533_frame_ops pn533_std_frame_ops = {
693 .tx_frame_init = pn533_std_tx_frame_init,
694 .tx_frame_finish = pn533_std_tx_frame_finish,
695 .tx_update_payload_len = pn533_std_tx_update_payload_len,
696 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
697 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
699 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
700 .rx_frame_size = pn533_std_rx_frame_size,
701 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
702 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
704 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
705 .get_cmd_code = pn533_std_get_cmd_code,
708 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
710 return (dev->ops->get_cmd_code(frame) ==
711 PN533_CMD_RESPONSE(dev->cmd->code));
714 static void pn533_recv_response(struct urb *urb)
716 struct pn533 *dev = urb->context;
717 struct pn533_cmd *cmd = dev->cmd;
720 cmd->status = urb->status;
722 switch (urb->status) {
727 dev_dbg(&dev->interface->dev,
728 "The urb has been canceled (status %d)\n",
733 nfc_err(&dev->interface->dev,
734 "Urb failure (status %d)\n", urb->status);
738 in_frame = dev->in_urb->transfer_buffer;
740 dev_dbg(&dev->interface->dev, "Received a frame\n");
741 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
742 dev->ops->rx_frame_size(in_frame), false);
744 if (!dev->ops->rx_is_frame_valid(in_frame, dev)) {
745 nfc_err(&dev->interface->dev, "Received an invalid frame\n");
750 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
751 nfc_err(&dev->interface->dev,
752 "It it not the response to the last command\n");
758 queue_work(dev->wq, &dev->cmd_complete_work);
761 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
763 dev->in_urb->complete = pn533_recv_response;
765 return usb_submit_urb(dev->in_urb, flags);
768 static void pn533_recv_ack(struct urb *urb)
770 struct pn533 *dev = urb->context;
771 struct pn533_cmd *cmd = dev->cmd;
772 struct pn533_std_frame *in_frame;
775 cmd->status = urb->status;
777 switch (urb->status) {
782 dev_dbg(&dev->interface->dev,
783 "The urb has been stopped (status %d)\n",
788 nfc_err(&dev->interface->dev,
789 "Urb failure (status %d)\n", urb->status);
793 in_frame = dev->in_urb->transfer_buffer;
795 if (!pn533_std_rx_frame_is_ack(in_frame)) {
796 nfc_err(&dev->interface->dev, "Received an invalid ack\n");
801 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
803 nfc_err(&dev->interface->dev,
804 "usb_submit_urb failed with result %d\n", rc);
812 queue_work(dev->wq, &dev->cmd_complete_work);
815 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
817 dev->in_urb->complete = pn533_recv_ack;
819 return usb_submit_urb(dev->in_urb, flags);
822 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
824 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
825 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
828 dev->out_urb->transfer_buffer = ack;
829 dev->out_urb->transfer_buffer_length = sizeof(ack);
830 rc = usb_submit_urb(dev->out_urb, flags);
835 static int __pn533_send_frame_async(struct pn533 *dev,
842 dev->out_urb->transfer_buffer = out->data;
843 dev->out_urb->transfer_buffer_length = out->len;
845 dev->in_urb->transfer_buffer = in->data;
846 dev->in_urb->transfer_buffer_length = in_len;
848 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
849 out->data, out->len, false);
851 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
855 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
856 /* request for response for sent packet directly */
857 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
860 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
861 /* request for ACK if that's the case */
862 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
870 usb_unlink_urb(dev->out_urb);
874 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
877 /* payload is already there, just update datalen */
878 int payload_len = skb->len;
879 struct pn533_frame_ops *ops = dev->ops;
882 skb_push(skb, ops->tx_header_len);
883 skb_put(skb, ops->tx_tail_len);
885 ops->tx_frame_init(skb->data, cmd_code);
886 ops->tx_update_payload_len(skb->data, payload_len);
887 ops->tx_frame_finish(skb->data);
890 static int pn533_send_async_complete(struct pn533 *dev)
892 struct pn533_cmd *cmd = dev->cmd;
893 int status = cmd->status;
895 struct sk_buff *req = cmd->req;
896 struct sk_buff *resp = cmd->resp;
903 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
909 skb_put(resp, dev->ops->rx_frame_size(resp->data));
910 skb_pull(resp, dev->ops->rx_header_len);
911 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
913 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
921 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
922 struct sk_buff *req, struct sk_buff *resp,
924 pn533_send_async_complete_t complete_cb,
925 void *complete_cb_context)
927 struct pn533_cmd *cmd;
930 dev_dbg(&dev->interface->dev, "Sending command 0x%x\n", cmd_code);
932 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
936 cmd->code = cmd_code;
939 cmd->resp_len = resp_len;
940 cmd->complete_cb = complete_cb;
941 cmd->complete_cb_context = complete_cb_context;
943 pn533_build_cmd_frame(dev, cmd_code, req);
945 mutex_lock(&dev->cmd_lock);
947 if (!dev->cmd_pending) {
948 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
952 dev->cmd_pending = 1;
957 dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x\n",
960 INIT_LIST_HEAD(&cmd->queue);
961 list_add_tail(&cmd->queue, &dev->cmd_queue);
968 mutex_unlock(&dev->cmd_lock);
972 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
974 pn533_send_async_complete_t complete_cb,
975 void *complete_cb_context)
977 struct sk_buff *resp;
979 int resp_len = dev->ops->rx_header_len +
980 dev->ops->max_payload_len +
981 dev->ops->rx_tail_len;
983 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
987 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
988 complete_cb_context);
995 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
997 pn533_send_async_complete_t complete_cb,
998 void *complete_cb_context)
1000 struct sk_buff *resp;
1002 int resp_len = dev->ops->rx_header_len +
1003 dev->ops->max_payload_len +
1004 dev->ops->rx_tail_len;
1006 resp = alloc_skb(resp_len, GFP_KERNEL);
1010 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
1011 complete_cb_context);
1013 dev_kfree_skb(resp);
1019 * pn533_send_cmd_direct_async
1021 * The function sends a piority cmd directly to the chip omiting the cmd
1022 * queue. It's intended to be used by chaining mechanism of received responses
1023 * where the host has to request every single chunk of data before scheduling
1024 * next cmd from the queue.
1026 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
1027 struct sk_buff *req,
1028 pn533_send_async_complete_t complete_cb,
1029 void *complete_cb_context)
1031 struct sk_buff *resp;
1032 struct pn533_cmd *cmd;
1034 int resp_len = dev->ops->rx_header_len +
1035 dev->ops->max_payload_len +
1036 dev->ops->rx_tail_len;
1038 resp = alloc_skb(resp_len, GFP_KERNEL);
1042 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1044 dev_kfree_skb(resp);
1048 cmd->code = cmd_code;
1051 cmd->resp_len = resp_len;
1052 cmd->complete_cb = complete_cb;
1053 cmd->complete_cb_context = complete_cb_context;
1055 pn533_build_cmd_frame(dev, cmd_code, req);
1057 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
1059 dev_kfree_skb(resp);
1068 static void pn533_wq_cmd_complete(struct work_struct *work)
1070 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1073 rc = pn533_send_async_complete(dev);
1074 if (rc != -EINPROGRESS)
1075 queue_work(dev->wq, &dev->cmd_work);
1078 static void pn533_wq_cmd(struct work_struct *work)
1080 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1081 struct pn533_cmd *cmd;
1084 mutex_lock(&dev->cmd_lock);
1086 if (list_empty(&dev->cmd_queue)) {
1087 dev->cmd_pending = 0;
1088 mutex_unlock(&dev->cmd_lock);
1092 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1094 list_del(&cmd->queue);
1096 mutex_unlock(&dev->cmd_lock);
1098 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
1100 dev_kfree_skb(cmd->req);
1101 dev_kfree_skb(cmd->resp);
1109 struct pn533_sync_cmd_response {
1110 struct sk_buff *resp;
1111 struct completion done;
1114 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1115 struct sk_buff *resp)
1117 struct pn533_sync_cmd_response *arg = _arg;
1120 complete(&arg->done);
1125 /* pn533_send_cmd_sync
1127 * Please note the req parameter is freed inside the function to
1128 * limit a number of return value interpretations by the caller.
1130 * 1. negative in case of error during TX path -> req should be freed
1132 * 2. negative in case of error during RX path -> req should not be freed
1133 * as it's been already freed at the begining of RX path by
1134 * async_complete_cb.
1136 * 3. valid pointer in case of succesfult RX path
1138 * A caller has to check a return value with IS_ERR macro. If the test pass,
1139 * the returned pointer is valid.
1142 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1143 struct sk_buff *req)
1146 struct pn533_sync_cmd_response arg;
1148 init_completion(&arg.done);
1150 rc = pn533_send_cmd_async(dev, cmd_code, req,
1151 pn533_send_sync_complete, &arg);
1157 wait_for_completion(&arg.done);
1162 static void pn533_send_complete(struct urb *urb)
1164 struct pn533 *dev = urb->context;
1166 switch (urb->status) {
1168 break; /* success */
1171 dev_dbg(&dev->interface->dev,
1172 "The urb has been stopped (status %d)\n",
1177 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
1182 static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1184 /* ACR122U does not support any command which aborts last
1185 * issued command i.e. as ACK for standard PN533. Additionally,
1186 * it behaves stange, sending broken or incorrect responses,
1187 * when we cancel urb before the chip will send response.
1189 if (dev->device_type == PN533_DEVICE_ACR122U)
1192 /* An ack will cancel the last issued command */
1193 pn533_send_ack(dev, flags);
1195 /* cancel the urb request */
1196 usb_kill_urb(dev->in_urb);
1199 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
1201 struct sk_buff *skb;
1203 skb = alloc_skb(dev->ops->tx_header_len +
1205 dev->ops->tx_tail_len, GFP_KERNEL);
1208 skb_reserve(skb, dev->ops->tx_header_len);
1213 struct pn533_target_type_a {
1221 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1222 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1223 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1225 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1226 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1228 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1229 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1231 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1232 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1233 #define PN533_TYPE_A_SEL_PROT_DEP 2
1234 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1236 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1237 int target_data_len)
1242 if (target_data_len < sizeof(struct pn533_target_type_a))
1245 /* The lenght check of nfcid[] and ats[] are not being performed because
1246 the values are not being used */
1248 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1249 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1250 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1252 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1253 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1254 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1255 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1258 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1259 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1265 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1268 struct pn533_target_type_a *tgt_type_a;
1270 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1272 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1275 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1276 case PN533_TYPE_A_SEL_PROT_MIFARE:
1277 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1279 case PN533_TYPE_A_SEL_PROT_ISO14443:
1280 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1282 case PN533_TYPE_A_SEL_PROT_DEP:
1283 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1285 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1286 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1287 NFC_PROTO_NFC_DEP_MASK;
1291 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1292 nfc_tgt->sel_res = tgt_type_a->sel_res;
1293 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1294 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1299 struct pn533_target_felica {
1302 u8 nfcid2[NFC_NFCID2_MAXSIZE];
1308 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1309 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1311 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1312 int target_data_len)
1314 if (target_data_len < sizeof(struct pn533_target_felica))
1317 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1323 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1326 struct pn533_target_felica *tgt_felica;
1328 tgt_felica = (struct pn533_target_felica *)tgt_data;
1330 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1333 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1334 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1335 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1337 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1339 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1340 nfc_tgt->sensf_res_len = 9;
1342 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1343 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1348 struct pn533_target_jewel {
1353 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1354 int target_data_len)
1359 if (target_data_len < sizeof(struct pn533_target_jewel))
1362 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1363 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1364 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1366 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1367 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1368 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1369 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1375 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1378 struct pn533_target_jewel *tgt_jewel;
1380 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1382 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1385 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1386 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1387 nfc_tgt->nfcid1_len = 4;
1388 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1393 struct pn533_type_b_prot_info {
1399 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1400 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1401 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1403 struct pn533_type_b_sens_res {
1407 struct pn533_type_b_prot_info prot_info;
1410 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1412 struct pn533_target_type_b {
1413 struct pn533_type_b_sens_res sensb_res;
1418 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1419 int target_data_len)
1421 if (target_data_len < sizeof(struct pn533_target_type_b))
1424 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1427 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1428 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1434 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1437 struct pn533_target_type_b *tgt_type_b;
1439 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1441 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1444 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1449 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1452 struct nfc_target nfc_tgt;
1455 dev_dbg(&dev->interface->dev, "%s: modulation=%d\n",
1456 __func__, dev->poll_mod_curr);
1461 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1463 switch (dev->poll_mod_curr) {
1464 case PN533_POLL_MOD_106KBPS_A:
1465 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1467 case PN533_POLL_MOD_212KBPS_FELICA:
1468 case PN533_POLL_MOD_424KBPS_FELICA:
1469 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1471 case PN533_POLL_MOD_106KBPS_JEWEL:
1472 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1474 case PN533_POLL_MOD_847KBPS_B:
1475 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1478 nfc_err(&dev->interface->dev,
1479 "Unknown current poll modulation\n");
1486 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1487 dev_dbg(&dev->interface->dev,
1488 "The Tg found doesn't have the desired protocol\n");
1492 dev_dbg(&dev->interface->dev,
1493 "Target found - supported protocols: 0x%x\n",
1494 nfc_tgt.supported_protocols);
1496 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1498 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1503 static inline void pn533_poll_next_mod(struct pn533 *dev)
1505 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1508 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1510 dev->poll_mod_count = 0;
1513 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1515 dev->poll_mod_active[dev->poll_mod_count] =
1516 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1517 dev->poll_mod_count++;
1520 static void pn533_poll_create_mod_list(struct pn533 *dev,
1521 u32 im_protocols, u32 tm_protocols)
1523 pn533_poll_reset_mod_list(dev);
1525 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1526 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1527 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1528 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1530 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1531 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1532 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1533 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1536 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1537 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1539 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1540 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1543 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1546 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1548 u8 nbtg, tg, *tgdata;
1551 /* Toggle the DEP polling */
1554 nbtg = resp->data[0];
1556 tgdata = &resp->data[2];
1557 tgdata_len = resp->len - 2; /* nbtg + tg */
1560 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1562 /* We must stop the poll after a valid target found */
1564 pn533_poll_reset_mod_list(dev);
1572 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1574 struct sk_buff *skb;
1575 u8 *felica, *nfcid3, *gb;
1577 u8 *gbytes = dev->gb;
1578 size_t gbytes_len = dev->gb_len;
1580 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1581 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1582 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1583 0xff, 0xff}; /* System code */
1585 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1587 0x40}; /* SEL_RES for DEP */
1589 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1590 felica (18), nfcid3 (10), gb_len (1) */
1594 skb = pn533_alloc_skb(dev, skb_len);
1598 /* DEP support only */
1599 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1602 memcpy(skb_put(skb, 6), mifare_params, 6);
1605 felica = skb_put(skb, 18);
1606 memcpy(felica, felica_params, 18);
1607 get_random_bytes(felica + 2, 6);
1610 nfcid3 = skb_put(skb, 10);
1611 memset(nfcid3, 0, 10);
1612 memcpy(nfcid3, felica, 8);
1615 *skb_put(skb, 1) = gbytes_len;
1617 gb = skb_put(skb, gbytes_len);
1618 memcpy(gb, gbytes, gbytes_len);
1621 *skb_put(skb, 1) = 0;
1626 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1627 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1628 static void pn533_wq_tm_mi_recv(struct work_struct *work);
1629 static struct sk_buff *pn533_build_response(struct pn533 *dev);
1631 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1632 struct sk_buff *resp)
1634 struct sk_buff *skb;
1638 dev_dbg(&dev->interface->dev, "%s\n", __func__);
1641 skb_queue_purge(&dev->resp_q);
1642 return PTR_ERR(resp);
1645 status = resp->data[0];
1647 ret = status & PN533_CMD_RET_MASK;
1648 mi = status & PN533_CMD_MI_MASK;
1650 skb_pull(resp, sizeof(status));
1652 if (ret != PN533_CMD_RET_SUCCESS) {
1657 skb_queue_tail(&dev->resp_q, resp);
1660 queue_work(dev->wq, &dev->mi_tm_rx_work);
1661 return -EINPROGRESS;
1664 skb = pn533_build_response(dev);
1670 return nfc_tm_data_received(dev->nfc_dev, skb);
1673 nfc_tm_deactivated(dev->nfc_dev);
1675 skb_queue_purge(&dev->resp_q);
1676 dev_kfree_skb(resp);
1681 static void pn533_wq_tm_mi_recv(struct work_struct *work)
1683 struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1684 struct sk_buff *skb;
1687 dev_dbg(&dev->interface->dev, "%s\n", __func__);
1689 skb = pn533_alloc_skb(dev, 0);
1693 rc = pn533_send_cmd_direct_async(dev,
1694 PN533_CMD_TG_GET_DATA,
1696 pn533_tm_get_data_complete,
1705 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1706 struct sk_buff *resp);
1707 static void pn533_wq_tm_mi_send(struct work_struct *work)
1709 struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1710 struct sk_buff *skb;
1713 dev_dbg(&dev->interface->dev, "%s\n", __func__);
1715 /* Grab the first skb in the queue */
1716 skb = skb_dequeue(&dev->fragment_skb);
1717 if (skb == NULL) { /* No more data */
1718 /* Reset the queue for future use */
1719 skb_queue_head_init(&dev->fragment_skb);
1723 /* last entry - remove MI bit */
1724 if (skb_queue_len(&dev->fragment_skb) == 0) {
1725 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1726 skb, pn533_tm_send_complete, NULL);
1728 rc = pn533_send_cmd_direct_async(dev,
1729 PN533_CMD_TG_SET_META_DATA,
1730 skb, pn533_tm_send_complete, NULL);
1732 if (rc == 0) /* success */
1735 dev_err(&dev->interface->dev,
1736 "Error %d when trying to perform set meta data_exchange", rc);
1741 pn533_send_ack(dev, GFP_KERNEL);
1742 queue_work(dev->wq, &dev->cmd_work);
1745 static void pn533_wq_tg_get_data(struct work_struct *work)
1747 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1748 struct sk_buff *skb;
1751 dev_dbg(&dev->interface->dev, "%s\n", __func__);
1753 skb = pn533_alloc_skb(dev, 0);
1757 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1758 pn533_tm_get_data_complete, NULL);
1766 #define ATR_REQ_GB_OFFSET 17
1767 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1769 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1773 dev_dbg(&dev->interface->dev, "%s\n", __func__);
1775 if (resp->len < ATR_REQ_GB_OFFSET + 1)
1778 mode = resp->data[0];
1779 cmd = &resp->data[1];
1781 dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1784 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1785 PN533_INIT_TARGET_RESP_ACTIVE)
1786 comm_mode = NFC_COMM_ACTIVE;
1788 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
1791 gb = cmd + ATR_REQ_GB_OFFSET;
1792 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1794 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1795 comm_mode, gb, gb_len);
1797 nfc_err(&dev->interface->dev,
1798 "Error when signaling target activation\n");
1803 queue_work(dev->wq, &dev->tg_work);
1808 static void pn533_listen_mode_timer(unsigned long data)
1810 struct pn533 *dev = (struct pn533 *)data;
1812 dev_dbg(&dev->interface->dev, "Listen mode timeout\n");
1814 dev->cancel_listen = 1;
1816 pn533_poll_next_mod(dev);
1818 queue_delayed_work(dev->wq, &dev->poll_work,
1819 msecs_to_jiffies(PN533_POLL_INTERVAL));
1822 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1823 struct sk_buff *resp)
1827 dev_dbg(&dev->interface->dev, "%s\n", __func__);
1832 nfc_err(&dev->interface->dev, "RF setting error %d", rc);
1837 queue_delayed_work(dev->wq, &dev->poll_work,
1838 msecs_to_jiffies(PN533_POLL_INTERVAL));
1840 dev_kfree_skb(resp);
1844 static void pn533_wq_rf(struct work_struct *work)
1846 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1847 struct sk_buff *skb;
1850 dev_dbg(&dev->interface->dev, "%s\n", __func__);
1852 skb = pn533_alloc_skb(dev, 2);
1856 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
1857 *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
1859 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1860 pn533_rf_complete, NULL);
1863 nfc_err(&dev->interface->dev, "RF setting error %d\n", rc);
1869 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1870 struct sk_buff *resp)
1872 struct pn533_cmd_jump_dep_response *rsp;
1873 struct nfc_target nfc_target;
1878 return PTR_ERR(resp);
1880 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1882 rc = rsp->status & PN533_CMD_RET_MASK;
1883 if (rc != PN533_CMD_RET_SUCCESS) {
1884 /* Not target found, turn radio off */
1885 queue_work(dev->wq, &dev->rf_work);
1887 dev_kfree_skb(resp);
1891 dev_dbg(&dev->interface->dev, "Creating new target");
1893 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1894 nfc_target.nfcid1_len = 10;
1895 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1896 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1900 dev->tgt_available_prots = 0;
1901 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1903 /* ATR_RES general bytes are located at offset 17 */
1904 target_gt_len = resp->len - 17;
1905 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1906 rsp->gt, target_gt_len);
1908 rc = nfc_dep_link_is_up(dev->nfc_dev,
1909 dev->nfc_dev->targets[0].idx,
1910 0, NFC_RF_INITIATOR);
1913 pn533_poll_reset_mod_list(dev);
1916 dev_kfree_skb(resp);
1920 #define PASSIVE_DATA_LEN 5
1921 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1923 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1924 struct sk_buff *skb;
1926 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1927 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1929 dev_dbg(&dev->interface->dev, "%s", __func__);
1932 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1934 if (!dev->gb || !dev->gb_len) {
1936 queue_work(dev->wq, &dev->rf_work);
1940 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1941 skb_len += PASSIVE_DATA_LEN;
1944 skb_len += NFC_NFCID3_MAXSIZE;
1947 get_random_bytes(nfcid3 + 2, 6);
1949 skb = pn533_alloc_skb(dev, skb_len);
1953 *skb_put(skb, 1) = 0x01; /* Active */
1954 *skb_put(skb, 1) = 0x02; /* 424 kbps */
1956 next = skb_put(skb, 1); /* Next */
1959 /* Copy passive data */
1960 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
1963 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1964 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
1965 NFC_NFCID3_MAXSIZE);
1968 memcpy(skb_put(skb, dev->gb_len), dev->gb, dev->gb_len);
1969 *next |= 4; /* We have some Gi */
1971 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1972 pn533_poll_dep_complete, NULL);
1980 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1981 struct sk_buff *resp)
1983 struct pn533_poll_modulations *cur_mod;
1986 dev_dbg(&dev->interface->dev, "%s\n", __func__);
1991 nfc_err(&dev->interface->dev, "%s Poll complete error %d\n",
1994 if (rc == -ENOENT) {
1995 if (dev->poll_mod_count != 0)
1999 } else if (rc < 0) {
2000 nfc_err(&dev->interface->dev,
2001 "Error %d when running poll\n", rc);
2006 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
2008 if (cur_mod->len == 0) { /* Target mode */
2009 del_timer(&dev->listen_timer);
2010 rc = pn533_init_target_complete(dev, resp);
2014 /* Initiator mode */
2015 rc = pn533_start_poll_complete(dev, resp);
2019 if (!dev->poll_mod_count) {
2020 dev_dbg(&dev->interface->dev, "Polling has been stopped\n");
2024 pn533_poll_next_mod(dev);
2025 /* Not target found, turn radio off */
2026 queue_work(dev->wq, &dev->rf_work);
2029 dev_kfree_skb(resp);
2033 nfc_err(&dev->interface->dev, "Polling operation has been stopped\n");
2035 pn533_poll_reset_mod_list(dev);
2036 dev->poll_protocols = 0;
2040 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
2041 struct pn533_poll_modulations *mod)
2043 struct sk_buff *skb;
2045 skb = pn533_alloc_skb(dev, mod->len);
2049 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
2054 static int pn533_send_poll_frame(struct pn533 *dev)
2056 struct pn533_poll_modulations *mod;
2057 struct sk_buff *skb;
2061 mod = dev->poll_mod_active[dev->poll_mod_curr];
2063 dev_dbg(&dev->interface->dev, "%s mod len %d\n",
2064 __func__, mod->len);
2066 if (dev->poll_dep) {
2068 return pn533_poll_dep(dev->nfc_dev);
2071 if (mod->len == 0) { /* Listen mode */
2072 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
2073 skb = pn533_alloc_poll_tg_frame(dev);
2074 } else { /* Polling mode */
2075 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
2076 skb = pn533_alloc_poll_in_frame(dev, mod);
2080 nfc_err(&dev->interface->dev, "Failed to allocate skb\n");
2084 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
2088 nfc_err(&dev->interface->dev, "Polling loop error %d\n", rc);
2094 static void pn533_wq_poll(struct work_struct *work)
2096 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
2097 struct pn533_poll_modulations *cur_mod;
2100 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
2102 dev_dbg(&dev->interface->dev,
2103 "%s cancel_listen %d modulation len %d\n",
2104 __func__, dev->cancel_listen, cur_mod->len);
2106 if (dev->cancel_listen == 1) {
2107 dev->cancel_listen = 0;
2108 pn533_abort_cmd(dev, GFP_ATOMIC);
2111 rc = pn533_send_poll_frame(dev);
2115 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
2116 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
2121 static int pn533_start_poll(struct nfc_dev *nfc_dev,
2122 u32 im_protocols, u32 tm_protocols)
2124 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2125 struct pn533_poll_modulations *cur_mod;
2129 dev_dbg(&dev->interface->dev,
2130 "%s: im protocols 0x%x tm protocols 0x%x\n",
2131 __func__, im_protocols, tm_protocols);
2133 if (dev->tgt_active_prot) {
2134 nfc_err(&dev->interface->dev,
2135 "Cannot poll with a target already activated\n");
2139 if (dev->tgt_mode) {
2140 nfc_err(&dev->interface->dev,
2141 "Cannot poll while already being activated\n");
2146 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
2147 if (dev->gb == NULL)
2151 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
2152 dev->poll_protocols = im_protocols;
2153 dev->listen_protocols = tm_protocols;
2155 /* Do not always start polling from the same modulation */
2156 get_random_bytes(&rand_mod, sizeof(rand_mod));
2157 rand_mod %= dev->poll_mod_count;
2158 dev->poll_mod_curr = rand_mod;
2160 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
2162 rc = pn533_send_poll_frame(dev);
2164 /* Start listen timer */
2165 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
2166 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
2171 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
2173 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2175 del_timer(&dev->listen_timer);
2177 if (!dev->poll_mod_count) {
2178 dev_dbg(&dev->interface->dev,
2179 "Polling operation was not running\n");
2183 pn533_abort_cmd(dev, GFP_KERNEL);
2184 flush_delayed_work(&dev->poll_work);
2185 pn533_poll_reset_mod_list(dev);
2188 static int pn533_activate_target_nfcdep(struct pn533 *dev)
2190 struct pn533_cmd_activate_response *rsp;
2193 struct sk_buff *skb;
2194 struct sk_buff *resp;
2196 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2198 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
2202 *skb_put(skb, sizeof(u8)) = 1; /* TG */
2203 *skb_put(skb, sizeof(u8)) = 0; /* Next */
2205 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
2207 return PTR_ERR(resp);
2209 rsp = (struct pn533_cmd_activate_response *)resp->data;
2210 rc = rsp->status & PN533_CMD_RET_MASK;
2211 if (rc != PN533_CMD_RET_SUCCESS) {
2212 nfc_err(&dev->interface->dev,
2213 "Target activation failed (error 0x%x)\n", rc);
2214 dev_kfree_skb(resp);
2218 /* ATR_RES general bytes are located at offset 16 */
2219 gt_len = resp->len - 16;
2220 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
2222 dev_kfree_skb(resp);
2226 static int pn533_activate_target(struct nfc_dev *nfc_dev,
2227 struct nfc_target *target, u32 protocol)
2229 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2232 dev_dbg(&dev->interface->dev, "%s: protocol=%u\n", __func__, protocol);
2234 if (dev->poll_mod_count) {
2235 nfc_err(&dev->interface->dev,
2236 "Cannot activate while polling\n");
2240 if (dev->tgt_active_prot) {
2241 nfc_err(&dev->interface->dev,
2242 "There is already an active target\n");
2246 if (!dev->tgt_available_prots) {
2247 nfc_err(&dev->interface->dev,
2248 "There is no available target to activate\n");
2252 if (!(dev->tgt_available_prots & (1 << protocol))) {
2253 nfc_err(&dev->interface->dev,
2254 "Target doesn't support requested proto %u\n",
2259 if (protocol == NFC_PROTO_NFC_DEP) {
2260 rc = pn533_activate_target_nfcdep(dev);
2262 nfc_err(&dev->interface->dev,
2263 "Activating target with DEP failed %d\n", rc);
2268 dev->tgt_active_prot = protocol;
2269 dev->tgt_available_prots = 0;
2274 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
2275 struct nfc_target *target)
2277 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2278 struct sk_buff *skb;
2279 struct sk_buff *resp;
2282 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2284 if (!dev->tgt_active_prot) {
2285 nfc_err(&dev->interface->dev, "There is no active target\n");
2289 dev->tgt_active_prot = 0;
2290 skb_queue_purge(&dev->resp_q);
2292 skb = pn533_alloc_skb(dev, sizeof(u8));
2296 *skb_put(skb, 1) = 1; /* TG*/
2298 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
2302 rc = resp->data[0] & PN533_CMD_RET_MASK;
2303 if (rc != PN533_CMD_RET_SUCCESS)
2304 nfc_err(&dev->interface->dev,
2305 "Error 0x%x when releasing the target\n", rc);
2307 dev_kfree_skb(resp);
2312 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
2313 struct sk_buff *resp)
2315 struct pn533_cmd_jump_dep_response *rsp;
2318 u8 active = *(u8 *)arg;
2323 return PTR_ERR(resp);
2325 if (dev->tgt_available_prots &&
2326 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
2327 nfc_err(&dev->interface->dev,
2328 "The target does not support DEP\n");
2333 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2335 rc = rsp->status & PN533_CMD_RET_MASK;
2336 if (rc != PN533_CMD_RET_SUCCESS) {
2337 nfc_err(&dev->interface->dev,
2338 "Bringing DEP link up failed (error 0x%x)\n", rc);
2342 if (!dev->tgt_available_prots) {
2343 struct nfc_target nfc_target;
2345 dev_dbg(&dev->interface->dev, "Creating new target\n");
2347 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2348 nfc_target.nfcid1_len = 10;
2349 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
2350 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2354 dev->tgt_available_prots = 0;
2357 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2359 /* ATR_RES general bytes are located at offset 17 */
2360 target_gt_len = resp->len - 17;
2361 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
2362 rsp->gt, target_gt_len);
2364 rc = nfc_dep_link_is_up(dev->nfc_dev,
2365 dev->nfc_dev->targets[0].idx,
2366 !active, NFC_RF_INITIATOR);
2369 dev_kfree_skb(resp);
2373 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
2374 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
2375 u8 comm_mode, u8 *gb, size_t gb_len)
2377 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2378 struct sk_buff *skb;
2380 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
2381 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2383 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2385 if (dev->poll_mod_count) {
2386 nfc_err(&dev->interface->dev,
2387 "Cannot bring the DEP link up while polling\n");
2391 if (dev->tgt_active_prot) {
2392 nfc_err(&dev->interface->dev,
2393 "There is already an active target\n");
2397 skb_len = 3 + gb_len; /* ActPass + BR + Next */
2398 skb_len += PASSIVE_DATA_LEN;
2401 skb_len += NFC_NFCID3_MAXSIZE;
2402 if (target && !target->nfcid2_len) {
2405 get_random_bytes(nfcid3 + 2, 6);
2408 skb = pn533_alloc_skb(dev, skb_len);
2412 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2413 *skb_put(skb, 1) = 0x02; /* 424 kbps */
2415 next = skb_put(skb, 1); /* Next */
2418 /* Copy passive data */
2419 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
2422 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2423 if (target && target->nfcid2_len)
2424 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2425 target->nfcid2_len);
2427 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
2428 NFC_NFCID3_MAXSIZE);
2431 if (gb != NULL && gb_len > 0) {
2432 memcpy(skb_put(skb, gb_len), gb, gb_len);
2433 *next |= 4; /* We have some Gi */
2438 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2446 pn533_rf_field(dev->nfc_dev, 0);
2448 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2449 pn533_in_dep_link_up_complete, arg);
2459 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2461 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2463 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2465 pn533_poll_reset_mod_list(dev);
2467 if (dev->tgt_mode || dev->tgt_active_prot)
2468 pn533_abort_cmd(dev, GFP_KERNEL);
2470 dev->tgt_active_prot = 0;
2473 skb_queue_purge(&dev->resp_q);
2478 struct pn533_data_exchange_arg {
2479 data_exchange_cb_t cb;
2483 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2485 struct sk_buff *skb, *tmp, *t;
2486 unsigned int skb_len = 0, tmp_len = 0;
2488 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2490 if (skb_queue_empty(&dev->resp_q))
2493 if (skb_queue_len(&dev->resp_q) == 1) {
2494 skb = skb_dequeue(&dev->resp_q);
2498 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2499 skb_len += tmp->len;
2501 dev_dbg(&dev->interface->dev, "%s total length %d\n",
2504 skb = alloc_skb(skb_len, GFP_KERNEL);
2508 skb_put(skb, skb_len);
2510 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2511 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2512 tmp_len += tmp->len;
2516 skb_queue_purge(&dev->resp_q);
2521 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2522 struct sk_buff *resp)
2524 struct pn533_data_exchange_arg *arg = _arg;
2525 struct sk_buff *skb;
2529 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2536 status = resp->data[0];
2537 ret = status & PN533_CMD_RET_MASK;
2538 mi = status & PN533_CMD_MI_MASK;
2540 skb_pull(resp, sizeof(status));
2542 if (ret != PN533_CMD_RET_SUCCESS) {
2543 nfc_err(&dev->interface->dev,
2544 "Exchanging data failed (error 0x%x)\n", ret);
2549 skb_queue_tail(&dev->resp_q, resp);
2552 dev->cmd_complete_mi_arg = arg;
2553 queue_work(dev->wq, &dev->mi_rx_work);
2554 return -EINPROGRESS;
2557 /* Prepare for the next round */
2558 if (skb_queue_len(&dev->fragment_skb) > 0) {
2559 dev->cmd_complete_dep_arg = arg;
2560 queue_work(dev->wq, &dev->mi_tx_work);
2562 return -EINPROGRESS;
2565 skb = pn533_build_response(dev);
2569 arg->cb(arg->cb_context, skb, 0);
2574 dev_kfree_skb(resp);
2576 skb_queue_purge(&dev->resp_q);
2577 arg->cb(arg->cb_context, NULL, rc);
2582 /* Split the Tx skb into small chunks */
2583 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2585 struct sk_buff *frag;
2589 /* Remaining size */
2590 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2591 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2593 frag_size = skb->len;
2595 /* Allocate and reserve */
2596 frag = pn533_alloc_skb(dev, frag_size);
2598 skb_queue_purge(&dev->fragment_skb);
2602 if (!dev->tgt_mode) {
2603 /* Reserve the TG/MI byte */
2604 skb_reserve(frag, 1);
2607 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2608 *skb_push(frag, sizeof(u8)) =
2609 (PN533_CMD_MI_MASK | 1);
2611 *skb_push(frag, sizeof(u8)) = 1; /* TG */
2614 memcpy(skb_put(frag, frag_size), skb->data, frag_size);
2616 /* Reduce the size of incoming buffer */
2617 skb_pull(skb, frag_size);
2619 /* Add this to skb_queue */
2620 skb_queue_tail(&dev->fragment_skb, frag);
2622 } while (skb->len > 0);
2626 return skb_queue_len(&dev->fragment_skb);
2629 static int pn533_transceive(struct nfc_dev *nfc_dev,
2630 struct nfc_target *target, struct sk_buff *skb,
2631 data_exchange_cb_t cb, void *cb_context)
2633 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2634 struct pn533_data_exchange_arg *arg = NULL;
2637 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2639 if (!dev->tgt_active_prot) {
2640 nfc_err(&dev->interface->dev,
2641 "Can't exchange data if there is no active target\n");
2646 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2653 arg->cb_context = cb_context;
2655 switch (dev->device_type) {
2656 case PN533_DEVICE_PASORI:
2657 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2658 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2660 pn533_data_exchange_complete,
2667 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2668 rc = pn533_fill_fragment_skbs(dev, skb);
2672 skb = skb_dequeue(&dev->fragment_skb);
2678 *skb_push(skb, sizeof(u8)) = 1; /* TG */
2681 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2682 skb, pn533_data_exchange_complete,
2688 if (rc < 0) /* rc from send_async */
2699 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2700 struct sk_buff *resp)
2704 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2707 return PTR_ERR(resp);
2709 status = resp->data[0];
2711 /* Prepare for the next round */
2712 if (skb_queue_len(&dev->fragment_skb) > 0) {
2713 queue_work(dev->wq, &dev->mi_tm_tx_work);
2714 return -EINPROGRESS;
2716 dev_kfree_skb(resp);
2719 nfc_tm_deactivated(dev->nfc_dev);
2726 queue_work(dev->wq, &dev->tg_work);
2731 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2733 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2736 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2738 /* let's split in multiple chunks if size's too big */
2739 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2740 rc = pn533_fill_fragment_skbs(dev, skb);
2744 /* get the first skb */
2745 skb = skb_dequeue(&dev->fragment_skb);
2751 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2752 pn533_tm_send_complete, NULL);
2755 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2756 pn533_tm_send_complete, NULL);
2762 skb_queue_purge(&dev->fragment_skb);
2768 static void pn533_wq_mi_recv(struct work_struct *work)
2770 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2771 struct sk_buff *skb;
2774 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2776 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2780 switch (dev->device_type) {
2781 case PN533_DEVICE_PASORI:
2782 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2783 rc = pn533_send_cmd_direct_async(dev,
2784 PN533_CMD_IN_COMM_THRU,
2786 pn533_data_exchange_complete,
2787 dev->cmd_complete_mi_arg);
2792 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
2794 rc = pn533_send_cmd_direct_async(dev,
2795 PN533_CMD_IN_DATA_EXCHANGE,
2797 pn533_data_exchange_complete,
2798 dev->cmd_complete_mi_arg);
2803 if (rc == 0) /* success */
2806 nfc_err(&dev->interface->dev,
2807 "Error %d when trying to perform data_exchange\n", rc);
2810 kfree(dev->cmd_complete_mi_arg);
2813 pn533_send_ack(dev, GFP_KERNEL);
2814 queue_work(dev->wq, &dev->cmd_work);
2817 static void pn533_wq_mi_send(struct work_struct *work)
2819 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2820 struct sk_buff *skb;
2823 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2825 /* Grab the first skb in the queue */
2826 skb = skb_dequeue(&dev->fragment_skb);
2828 if (skb == NULL) { /* No more data */
2829 /* Reset the queue for future use */
2830 skb_queue_head_init(&dev->fragment_skb);
2834 switch (dev->device_type) {
2835 case PN533_DEVICE_PASORI:
2836 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2841 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2843 pn533_data_exchange_complete,
2844 dev->cmd_complete_dep_arg);
2849 /* Still some fragments? */
2850 rc = pn533_send_cmd_direct_async(dev,PN533_CMD_IN_DATA_EXCHANGE,
2852 pn533_data_exchange_complete,
2853 dev->cmd_complete_dep_arg);
2858 if (rc == 0) /* success */
2861 nfc_err(&dev->interface->dev,
2862 "Error %d when trying to perform data_exchange\n", rc);
2865 kfree(dev->cmd_complete_dep_arg);
2868 pn533_send_ack(dev, GFP_KERNEL);
2869 queue_work(dev->wq, &dev->cmd_work);
2872 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2875 struct sk_buff *skb;
2876 struct sk_buff *resp;
2879 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2881 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2883 skb = pn533_alloc_skb(dev, skb_len);
2887 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2888 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2890 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2892 return PTR_ERR(resp);
2894 dev_kfree_skb(resp);
2898 static int pn533_get_firmware_version(struct pn533 *dev,
2899 struct pn533_fw_version *fv)
2901 struct sk_buff *skb;
2902 struct sk_buff *resp;
2904 skb = pn533_alloc_skb(dev, 0);
2908 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2910 return PTR_ERR(resp);
2912 fv->ic = resp->data[0];
2913 fv->ver = resp->data[1];
2914 fv->rev = resp->data[2];
2915 fv->support = resp->data[3];
2917 dev_kfree_skb(resp);
2921 static int pn533_pasori_fw_reset(struct pn533 *dev)
2923 struct sk_buff *skb;
2924 struct sk_buff *resp;
2926 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2928 skb = pn533_alloc_skb(dev, sizeof(u8));
2932 *skb_put(skb, sizeof(u8)) = 0x1;
2934 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2936 return PTR_ERR(resp);
2938 dev_kfree_skb(resp);
2943 struct pn533_acr122_poweron_rdr_arg {
2945 struct completion done;
2948 static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2950 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2952 dev_dbg(&urb->dev->dev, "%s\n", __func__);
2954 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2955 urb->transfer_buffer, urb->transfer_buffer_length,
2958 arg->rc = urb->status;
2959 complete(&arg->done);
2962 static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2964 /* Power on th reader (CCID cmd) */
2965 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2966 0, 0, 0, 0, 0, 0, 3, 0, 0};
2970 struct pn533_acr122_poweron_rdr_arg arg;
2972 dev_dbg(&dev->interface->dev, "%s\n", __func__);
2974 init_completion(&arg.done);
2975 cntx = dev->in_urb->context; /* backup context */
2977 dev->in_urb->transfer_buffer = buf;
2978 dev->in_urb->transfer_buffer_length = 255;
2979 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2980 dev->in_urb->context = &arg;
2982 dev->out_urb->transfer_buffer = cmd;
2983 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2985 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2986 cmd, sizeof(cmd), false);
2988 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2990 nfc_err(&dev->interface->dev,
2991 "Reader power on cmd error %d\n", rc);
2995 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2997 nfc_err(&dev->interface->dev,
2998 "Can't submit reader poweron cmd response %d\n", rc);
3002 wait_for_completion(&arg.done);
3003 dev->in_urb->context = cntx; /* restore context */
3008 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
3010 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
3014 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
3016 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
3017 (u8 *)&rf_field, 1);
3019 nfc_err(&dev->interface->dev, "Error on setting RF field\n");
3026 static int pn533_dev_up(struct nfc_dev *nfc_dev)
3028 return pn533_rf_field(nfc_dev, 1);
3031 static int pn533_dev_down(struct nfc_dev *nfc_dev)
3033 return pn533_rf_field(nfc_dev, 0);
3036 static struct nfc_ops pn533_nfc_ops = {
3037 .dev_up = pn533_dev_up,
3038 .dev_down = pn533_dev_down,
3039 .dep_link_up = pn533_dep_link_up,
3040 .dep_link_down = pn533_dep_link_down,
3041 .start_poll = pn533_start_poll,
3042 .stop_poll = pn533_stop_poll,
3043 .activate_target = pn533_activate_target,
3044 .deactivate_target = pn533_deactivate_target,
3045 .im_transceive = pn533_transceive,
3046 .tm_send = pn533_tm_send,
3049 static int pn533_setup(struct pn533 *dev)
3051 struct pn533_config_max_retries max_retries;
3052 struct pn533_config_timing timing;
3053 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
3056 switch (dev->device_type) {
3057 case PN533_DEVICE_STD:
3058 case PN533_DEVICE_PASORI:
3059 case PN533_DEVICE_ACR122U:
3060 max_retries.mx_rty_atr = 0x2;
3061 max_retries.mx_rty_psl = 0x1;
3062 max_retries.mx_rty_passive_act =
3063 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
3065 timing.rfu = PN533_CONFIG_TIMING_102;
3066 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
3067 timing.dep_timeout = PN533_CONFIG_TIMING_204;
3072 nfc_err(&dev->interface->dev, "Unknown device type %d\n",
3077 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
3078 (u8 *)&max_retries, sizeof(max_retries));
3080 nfc_err(&dev->interface->dev,
3081 "Error on setting MAX_RETRIES config\n");
3086 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
3087 (u8 *)&timing, sizeof(timing));
3089 nfc_err(&dev->interface->dev, "Error on setting RF timings\n");
3093 switch (dev->device_type) {
3094 case PN533_DEVICE_STD:
3097 case PN533_DEVICE_PASORI:
3098 pn533_pasori_fw_reset(dev);
3100 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
3103 nfc_err(&dev->interface->dev,
3104 "Error while settings PASORI config\n");
3108 pn533_pasori_fw_reset(dev);
3116 static int pn533_probe(struct usb_interface *interface,
3117 const struct usb_device_id *id)
3119 struct pn533_fw_version fw_ver;
3121 struct usb_host_interface *iface_desc;
3122 struct usb_endpoint_descriptor *endpoint;
3123 int in_endpoint = 0;
3124 int out_endpoint = 0;
3129 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
3133 dev->udev = usb_get_dev(interface_to_usbdev(interface));
3134 dev->interface = interface;
3135 mutex_init(&dev->cmd_lock);
3137 iface_desc = interface->cur_altsetting;
3138 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
3139 endpoint = &iface_desc->endpoint[i].desc;
3141 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
3142 in_endpoint = endpoint->bEndpointAddress;
3144 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
3145 out_endpoint = endpoint->bEndpointAddress;
3148 if (!in_endpoint || !out_endpoint) {
3149 nfc_err(&interface->dev,
3150 "Could not find bulk-in or bulk-out endpoint\n");
3155 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
3156 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
3158 if (!dev->in_urb || !dev->out_urb)
3161 usb_fill_bulk_urb(dev->in_urb, dev->udev,
3162 usb_rcvbulkpipe(dev->udev, in_endpoint),
3163 NULL, 0, NULL, dev);
3164 usb_fill_bulk_urb(dev->out_urb, dev->udev,
3165 usb_sndbulkpipe(dev->udev, out_endpoint),
3166 NULL, 0, pn533_send_complete, dev);
3168 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
3169 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
3170 INIT_WORK(&dev->mi_rx_work, pn533_wq_mi_recv);
3171 INIT_WORK(&dev->mi_tx_work, pn533_wq_mi_send);
3172 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
3173 INIT_WORK(&dev->mi_tm_rx_work, pn533_wq_tm_mi_recv);
3174 INIT_WORK(&dev->mi_tm_tx_work, pn533_wq_tm_mi_send);
3175 INIT_DELAYED_WORK(&dev->poll_work, pn533_wq_poll);
3176 INIT_WORK(&dev->rf_work, pn533_wq_rf);
3177 dev->wq = alloc_ordered_workqueue("pn533", 0);
3178 if (dev->wq == NULL)
3181 init_timer(&dev->listen_timer);
3182 dev->listen_timer.data = (unsigned long) dev;
3183 dev->listen_timer.function = pn533_listen_mode_timer;
3185 skb_queue_head_init(&dev->resp_q);
3186 skb_queue_head_init(&dev->fragment_skb);
3188 INIT_LIST_HEAD(&dev->cmd_queue);
3190 usb_set_intfdata(interface, dev);
3192 dev->ops = &pn533_std_frame_ops;
3194 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
3195 dev->device_type = id->driver_info;
3196 switch (dev->device_type) {
3197 case PN533_DEVICE_STD:
3198 protocols = PN533_ALL_PROTOCOLS;
3201 case PN533_DEVICE_PASORI:
3202 protocols = PN533_NO_TYPE_B_PROTOCOLS;
3205 case PN533_DEVICE_ACR122U:
3206 protocols = PN533_NO_TYPE_B_PROTOCOLS;
3207 dev->ops = &pn533_acr122_frame_ops;
3208 dev->protocol_type = PN533_PROTO_REQ_RESP,
3210 rc = pn533_acr122_poweron_rdr(dev);
3212 nfc_err(&dev->interface->dev,
3213 "Couldn't poweron the reader (error %d)\n", rc);
3219 nfc_err(&dev->interface->dev, "Unknown device type %d\n",
3225 memset(&fw_ver, 0, sizeof(fw_ver));
3226 rc = pn533_get_firmware_version(dev, &fw_ver);
3230 nfc_info(&dev->interface->dev,
3231 "NXP PN5%02X firmware ver %d.%d now attached\n",
3232 fw_ver.ic, fw_ver.ver, fw_ver.rev);
3235 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
3236 dev->ops->tx_header_len +
3237 PN533_CMD_DATAEXCH_HEAD_LEN,
3238 dev->ops->tx_tail_len);
3239 if (!dev->nfc_dev) {
3244 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
3245 nfc_set_drvdata(dev->nfc_dev, dev);
3247 rc = nfc_register_device(dev->nfc_dev);
3251 rc = pn533_setup(dev);
3253 goto unregister_nfc_dev;
3258 nfc_unregister_device(dev->nfc_dev);
3261 nfc_free_device(dev->nfc_dev);
3264 destroy_workqueue(dev->wq);
3266 usb_free_urb(dev->in_urb);
3267 usb_free_urb(dev->out_urb);
3268 usb_put_dev(dev->udev);
3273 static void pn533_disconnect(struct usb_interface *interface)
3276 struct pn533_cmd *cmd, *n;
3278 dev = usb_get_intfdata(interface);
3279 usb_set_intfdata(interface, NULL);
3281 nfc_unregister_device(dev->nfc_dev);
3282 nfc_free_device(dev->nfc_dev);
3284 usb_kill_urb(dev->in_urb);
3285 usb_kill_urb(dev->out_urb);
3287 flush_delayed_work(&dev->poll_work);
3288 destroy_workqueue(dev->wq);
3290 skb_queue_purge(&dev->resp_q);
3292 del_timer(&dev->listen_timer);
3294 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
3295 list_del(&cmd->queue);
3299 usb_free_urb(dev->in_urb);
3300 usb_free_urb(dev->out_urb);
3303 nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n");
3306 static struct usb_driver pn533_driver = {
3308 .probe = pn533_probe,
3309 .disconnect = pn533_disconnect,
3310 .id_table = pn533_table,
3313 module_usb_driver(pn533_driver);
3315 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
3316 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
3317 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
3318 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
3319 MODULE_VERSION(VERSION);
3320 MODULE_LICENSE("GPL");