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NFC: port100: Add initiator mode support
[mirror_ubuntu-hirsute-kernel.git] / drivers / nfc / port100.c
CommitLineData
562d4d59
TE		 1/*
2 * Sony NFC Port-100 Series driver
3 * Copyright (c) 2013, Intel Corporation.
4 *
5 * Partly based/Inspired by Stephen Tiedemann's nfcpy
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 */
17
18#include <linux/module.h>
19#include <linux/usb.h>
20#include <net/nfc/digital.h>
21
22#define VERSION "0.1"
23
24#define SONY_VENDOR_ID 0x054c
25#define RCS380_PRODUCT_ID 0x06c1
26
27#define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
28 NFC_PROTO_MIFARE_MASK | \
29 NFC_PROTO_FELICA_MASK | \
30 NFC_PROTO_NFC_DEP_MASK)
31
32#define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
33 NFC_DIGITAL_DRV_CAPS_TG_CRC)
34
0347a6ab
TE		 35/* Standard port100 frame definitions */
36#define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \
37 + 2) /* data[0] CC, data[1] SCC */
38#define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
39
40#define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd))
41
42/*
43 * Max extended frame payload len, excluding CC and SCC
44 * which are already in PORT100_FRAME_HEADER_LEN.
45 */
46#define PORT100_FRAME_MAX_PAYLOAD_LEN 1001
47
48#define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
49 Postamble (1) */
50static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
51 0x00, 0x00, 0xff, 0x00, 0xff, 0x00
52};
53
54#define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)])
55#define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1])
56
57/* start of frame */
58#define PORT100_FRAME_SOF 0x00FF
59#define PORT100_FRAME_EXT 0xFFFF
60#define PORT100_FRAME_ACK 0x00FF
61
62/* Port-100 command: in or out */
63#define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */
64#define PORT100_FRAME_DIR_OUT 0xD6
65#define PORT100_FRAME_DIR_IN 0xD7
66
67/* Port-100 sub-command */
68#define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */
69
70#define PORT100_CMD_GET_FIRMWARE_VERSION 0x20
71#define PORT100_CMD_GET_COMMAND_TYPE 0x28
72#define PORT100_CMD_SET_COMMAND_TYPE 0x2A
73
9f7b57f2
TE		 74#define PORT100_CMD_IN_SET_RF 0x00
75#define PORT100_CMD_IN_SET_PROTOCOL 0x02
76#define PORT100_CMD_IN_COMM_RF 0x04
77
78#define PORT100_CMD_SWITCH_RF 0x06
79
0347a6ab
TE		 80#define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
81
82#define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
83 ((mask) & (0x01 << (cmd_type)))
84#define PORT100_CMD_TYPE_0 0
85#define PORT100_CMD_TYPE_1 1
86
9f7b57f2
TE		 87#define PORT100_CMD_STATUS_OK 0x00
88#define PORT100_CMD_STATUS_TIMEOUT 0x80
89
0347a6ab
TE		 90struct port100;
91
92typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
93 struct sk_buff *resp);
94
9f7b57f2
TE		 95/**
96 * Setting sets structure for in_set_rf command
97 *
98 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
99 * This table contains multiple RF setting sets required for RF
100 * communication.
101 *
102 * @in_*_comm_type: Theses fields set the communication type to be used.
103 */
104struct port100_in_rf_setting {
105 u8 in_send_set_number;
106 u8 in_send_comm_type;
107 u8 in_recv_set_number;
108 u8 in_recv_comm_type;
109} __packed;
110
111#define PORT100_COMM_TYPE_IN_212F 0x01
112#define PORT100_COMM_TYPE_IN_424F 0x02
113#define PORT100_COMM_TYPE_IN_106A 0x03
114
115static const struct port100_in_rf_setting in_rf_settings[] = {
116 [NFC_DIGITAL_RF_TECH_212F] = {
117 .in_send_set_number = 1,
118 .in_send_comm_type = PORT100_COMM_TYPE_IN_212F,
119 .in_recv_set_number = 15,
120 .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F,
121 },
122 [NFC_DIGITAL_RF_TECH_424F] = {
123 .in_send_set_number = 1,
124 .in_send_comm_type = PORT100_COMM_TYPE_IN_424F,
125 .in_recv_set_number = 15,
126 .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F,
127 },
128 [NFC_DIGITAL_RF_TECH_106A] = {
129 .in_send_set_number = 2,
130 .in_send_comm_type = PORT100_COMM_TYPE_IN_106A,
131 .in_recv_set_number = 15,
132 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A,
133 },
134};
135
136#define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
137#define PORT100_IN_PROT_ADD_CRC 0x01
138#define PORT100_IN_PROT_CHECK_CRC 0x02
139#define PORT100_IN_PROT_MULTI_CARD 0x03
140#define PORT100_IN_PROT_ADD_PARITY 0x04
141#define PORT100_IN_PROT_CHECK_PARITY 0x05
142#define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06
143#define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07
144#define PORT100_IN_PROT_CRYPTO1 0x08
145#define PORT100_IN_PROT_ADD_SOF 0x09
146#define PORT100_IN_PROT_CHECK_SOF 0x0A
147#define PORT100_IN_PROT_ADD_EOF 0x0B
148#define PORT100_IN_PROT_CHECK_EOF 0x0C
149#define PORT100_IN_PROT_DEAF_TIME 0x0E
150#define PORT100_IN_PROT_CRM 0x0F
151#define PORT100_IN_PROT_CRM_MIN_LEN 0x10
152#define PORT100_IN_PROT_T1_TAG_FRAME 0x11
153#define PORT100_IN_PROT_RFCA 0x12
154#define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
155#define PORT100_IN_PROT_END 0x14
156
157#define PORT100_IN_MAX_NUM_PROTOCOLS 19
158
159struct port100_protocol {
160 u8 number;
161 u8 value;
162} __packed;
163
164static struct port100_protocol
165in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
166 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
167 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
168 { PORT100_IN_PROT_ADD_CRC, 0 },
169 { PORT100_IN_PROT_CHECK_CRC, 0 },
170 { PORT100_IN_PROT_MULTI_CARD, 0 },
171 { PORT100_IN_PROT_ADD_PARITY, 0 },
172 { PORT100_IN_PROT_CHECK_PARITY, 1 },
173 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
174 { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 },
175 { PORT100_IN_PROT_CRYPTO1, 0 },
176 { PORT100_IN_PROT_ADD_SOF, 0 },
177 { PORT100_IN_PROT_CHECK_SOF, 0 },
178 { PORT100_IN_PROT_ADD_EOF, 0 },
179 { PORT100_IN_PROT_CHECK_EOF, 0 },
180 { PORT100_IN_PROT_DEAF_TIME, 4 },
181 { PORT100_IN_PROT_CRM, 0 },
182 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
183 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
184 { PORT100_IN_PROT_RFCA, 0 },
185 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
186 { PORT100_IN_PROT_END, 0 },
187 },
188 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
189 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
190 { PORT100_IN_PROT_ADD_CRC, 0 },
191 { PORT100_IN_PROT_CHECK_CRC, 0 },
192 { PORT100_IN_PROT_MULTI_CARD, 0 },
193 { PORT100_IN_PROT_ADD_PARITY, 1 },
194 { PORT100_IN_PROT_CHECK_PARITY, 1 },
195 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
196 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
197 { PORT100_IN_PROT_CRYPTO1, 0 },
198 { PORT100_IN_PROT_ADD_SOF, 0 },
199 { PORT100_IN_PROT_CHECK_SOF, 0 },
200 { PORT100_IN_PROT_ADD_EOF, 0 },
201 { PORT100_IN_PROT_CHECK_EOF, 0 },
202 { PORT100_IN_PROT_DEAF_TIME, 4 },
203 { PORT100_IN_PROT_CRM, 0 },
204 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
205 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
206 { PORT100_IN_PROT_RFCA, 0 },
207 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
208 { PORT100_IN_PROT_END, 0 },
209 },
210 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
211 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
212 { PORT100_IN_PROT_ADD_CRC, 1 },
213 { PORT100_IN_PROT_CHECK_CRC, 1 },
214 { PORT100_IN_PROT_MULTI_CARD, 0 },
215 { PORT100_IN_PROT_ADD_PARITY, 1 },
216 { PORT100_IN_PROT_CHECK_PARITY, 1 },
217 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
218 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
219 { PORT100_IN_PROT_CRYPTO1, 0 },
220 { PORT100_IN_PROT_ADD_SOF, 0 },
221 { PORT100_IN_PROT_CHECK_SOF, 0 },
222 { PORT100_IN_PROT_ADD_EOF, 0 },
223 { PORT100_IN_PROT_CHECK_EOF, 0 },
224 { PORT100_IN_PROT_DEAF_TIME, 4 },
225 { PORT100_IN_PROT_CRM, 0 },
226 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
227 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
228 { PORT100_IN_PROT_RFCA, 0 },
229 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
230 { PORT100_IN_PROT_END, 0 },
231 },
232 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
233 /* nfc_digital_framing_nfca_short */
234 { PORT100_IN_PROT_ADD_CRC, 2 },
235 { PORT100_IN_PROT_CHECK_CRC, 2 },
236 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
237 { PORT100_IN_PROT_T1_TAG_FRAME, 2 },
238 { PORT100_IN_PROT_END, 0 },
239 },
240 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
241 /* nfc_digital_framing_nfca_standard */
242 { PORT100_IN_PROT_ADD_CRC, 1 },
243 { PORT100_IN_PROT_CHECK_CRC, 0 },
244 { PORT100_IN_PROT_END, 0 },
245 },
246 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
247 /* nfc_digital_framing_nfca_standard */
248 { PORT100_IN_PROT_END, 0 },
249 },
250 [NFC_DIGITAL_FRAMING_NFCF] = {
251 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
252 { PORT100_IN_PROT_ADD_CRC, 1 },
253 { PORT100_IN_PROT_CHECK_CRC, 1 },
254 { PORT100_IN_PROT_MULTI_CARD, 0 },
255 { PORT100_IN_PROT_ADD_PARITY, 0 },
256 { PORT100_IN_PROT_CHECK_PARITY, 0 },
257 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
258 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
259 { PORT100_IN_PROT_CRYPTO1, 0 },
260 { PORT100_IN_PROT_ADD_SOF, 0 },
261 { PORT100_IN_PROT_CHECK_SOF, 0 },
262 { PORT100_IN_PROT_ADD_EOF, 0 },
263 { PORT100_IN_PROT_CHECK_EOF, 0 },
264 { PORT100_IN_PROT_DEAF_TIME, 4 },
265 { PORT100_IN_PROT_CRM, 0 },
266 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
267 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
268 { PORT100_IN_PROT_RFCA, 0 },
269 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
270 { PORT100_IN_PROT_END, 0 },
271 },
272 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
273 /* nfc_digital_framing_nfcf */
274 { PORT100_IN_PROT_END, 0 },
275 },
276 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
277 /* nfc_digital_framing_nfcf */
278 { PORT100_IN_PROT_END, 0 },
279 },
280 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
281 { PORT100_IN_PROT_END, 0 },
282 },
283};
284
562d4d59
TE		 285struct port100 {
286 struct nfc_digital_dev *nfc_digital_dev;
287
288 int skb_headroom;
289 int skb_tailroom;
290
291 struct usb_device *udev;
292 struct usb_interface *interface;
0347a6ab
TE		 293
294 struct urb *out_urb;
295 struct urb *in_urb;
296
297 struct work_struct cmd_complete_work;
298
299 u8 cmd_type;
300
301 /* The digital stack serializes commands to be sent. There is no need
302 * for any queuing/locking mechanism at driver level.
303 */
304 struct port100_cmd *cmd;
305};
306
307struct port100_cmd {
308 u8 code;
309 int status;
310 struct sk_buff *req;
311 struct sk_buff *resp;
312 int resp_len;
313 port100_send_async_complete_t complete_cb;
314 void *complete_cb_context;
315};
316
317struct port100_frame {
318 u8 preamble;
319 __be16 start_frame;
320 __be16 extended_frame;
321 __le16 datalen;
322 u8 datalen_checksum;
323 u8 data[];
324} __packed;
325
326struct port100_ack_frame {
327 u8 preamble;
328 __be16 start_frame;
329 __be16 ack_frame;
330 u8 postambule;
331} __packed;
332
333struct port100_cb_arg {
334 nfc_digital_cmd_complete_t complete_cb;
335 void *complete_arg;
336 u8 mdaa;
562d4d59
TE		 337};
338
0347a6ab
TE		 339struct port100_tg_comm_rf_cmd {
340 __le16 guard_time;
341 __le16 send_timeout;
342 u8 mdaa;
343 u8 nfca_param[6];
344 u8 nfcf_param[18];
345 u8 mf_halted;
346 u8 arae_flag;
347 __le16 recv_timeout;
348 u8 data[];
349} __packed;
350
351/* The rule: value + checksum = 0 */
352static inline u8 port100_checksum(u16 value)
353{
354 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
355}
356
357/* The rule: sum(data elements) + checksum = 0 */
358static u8 port100_data_checksum(u8 *data, int datalen)
359{
360 u8 sum = 0;
361 int i;
362
363 for (i = 0; i < datalen; i++)
364 sum += data[i];
365
366 return port100_checksum(sum);
367}
368
369static void port100_tx_frame_init(void *_frame, u8 cmd_code)
370{
371 struct port100_frame *frame = _frame;
372
373 frame->preamble = 0;
374 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
375 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
376 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
377 PORT100_FRAME_CMD(frame) = cmd_code;
378 frame->datalen = cpu_to_le16(2);
379}
380
381static void port100_tx_frame_finish(void *_frame)
382{
383 struct port100_frame *frame = _frame;
384
385 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
386
387 PORT100_FRAME_CHECKSUM(frame) =
388 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
389
390 PORT100_FRAME_POSTAMBLE(frame) = 0;
391}
392
393static void port100_tx_update_payload_len(void *_frame, int len)
394{
395 struct port100_frame *frame = _frame;
396
397 frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len);
398}
399
400static bool port100_rx_frame_is_valid(void *_frame)
401{
402 u8 checksum;
403 struct port100_frame *frame = _frame;
404
405 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
406 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
407 return false;
408
409 checksum = port100_checksum(le16_to_cpu(frame->datalen));
410 if (checksum != frame->datalen_checksum)
411 return false;
412
413 checksum = port100_data_checksum(frame->data,
414 le16_to_cpu(frame->datalen));
415 if (checksum != PORT100_FRAME_CHECKSUM(frame))
416 return false;
417
418 return true;
419}
420
421static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
422{
423 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
424 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
425}
426
427static inline int port100_rx_frame_size(void *frame)
428{
429 struct port100_frame *f = frame;
430
431 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
432 PORT100_FRAME_TAIL_LEN;
433}
434
435static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
436{
437 struct port100_frame *f = frame;
438
439 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
440}
441
442static void port100_recv_response(struct urb *urb)
443{
444 struct port100 *dev = urb->context;
445 struct port100_cmd *cmd = dev->cmd;
446 u8 *in_frame;
447
448 cmd->status = urb->status;
449
450 switch (urb->status) {
451 case 0:
452 break; /* success */
453 case -ECONNRESET:
454 case -ENOENT:
455 nfc_err(&dev->interface->dev,
456 "The urb has been canceled (status %d)", urb->status);
457 goto sched_wq;
458 case -ESHUTDOWN:
459 default:
460 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
461 urb->status);
462 goto sched_wq;
463 }
464
465 in_frame = dev->in_urb->transfer_buffer;
466
467 if (!port100_rx_frame_is_valid(in_frame)) {
468 nfc_err(&dev->interface->dev, "Received an invalid frame");
469 cmd->status = -EIO;
470 goto sched_wq;
471 }
472
473 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
474 port100_rx_frame_size(in_frame), false);
475
476 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
477 nfc_err(&dev->interface->dev,
478 "It's not the response to the last command");
479 cmd->status = -EIO;
480 goto sched_wq;
481 }
482
483sched_wq:
484 schedule_work(&dev->cmd_complete_work);
485}
486
487static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
488{
489 dev->in_urb->complete = port100_recv_response;
490
491 return usb_submit_urb(dev->in_urb, flags);
492}
493
494static void port100_recv_ack(struct urb *urb)
495{
496 struct port100 *dev = urb->context;
497 struct port100_cmd *cmd = dev->cmd;
498 struct port100_ack_frame *in_frame;
499 int rc;
500
501 cmd->status = urb->status;
502
503 switch (urb->status) {
504 case 0:
505 break; /* success */
506 case -ECONNRESET:
507 case -ENOENT:
508 nfc_err(&dev->interface->dev,
509 "The urb has been stopped (status %d)", urb->status);
510 goto sched_wq;
511 case -ESHUTDOWN:
512 default:
513 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
514 urb->status);
515 goto sched_wq;
516 }
517
518 in_frame = dev->in_urb->transfer_buffer;
519
520 if (!port100_rx_frame_is_ack(in_frame)) {
521 nfc_err(&dev->interface->dev, "Received an invalid ack");
522 cmd->status = -EIO;
523 goto sched_wq;
524 }
525
526 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
527 if (rc) {
528 nfc_err(&dev->interface->dev,
529 "usb_submit_urb failed with result %d", rc);
530 cmd->status = rc;
531 goto sched_wq;
532 }
533
534 return;
535
536sched_wq:
537 schedule_work(&dev->cmd_complete_work);
538}
539
540static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
541{
542 dev->in_urb->complete = port100_recv_ack;
543
544 return usb_submit_urb(dev->in_urb, flags);
545}
546
547static int port100_send_ack(struct port100 *dev)
548{
549 int rc;
550
551 dev->out_urb->transfer_buffer = ack_frame;
552 dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
553 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
554
555 return rc;
556}
557
558static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
559 struct sk_buff *in, int in_len)
560{
561 int rc;
562
563 dev->out_urb->transfer_buffer = out->data;
564 dev->out_urb->transfer_buffer_length = out->len;
565
566 dev->in_urb->transfer_buffer = in->data;
567 dev->in_urb->transfer_buffer_length = in_len;
568
569 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
570 out->data, out->len, false);
571
572 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
573 if (rc)
574 return rc;
575
576 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
577 if (rc)
578 goto error;
579
580 return 0;
581
582error:
583 usb_unlink_urb(dev->out_urb);
584 return rc;
585}
586
587static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
588 struct sk_buff *skb)
589{
590 /* payload is already there, just update datalen */
591 int payload_len = skb->len;
592
593 skb_push(skb, PORT100_FRAME_HEADER_LEN);
594 skb_put(skb, PORT100_FRAME_TAIL_LEN);
595
596 port100_tx_frame_init(skb->data, cmd_code);
597 port100_tx_update_payload_len(skb->data, payload_len);
598 port100_tx_frame_finish(skb->data);
599}
600
601static void port100_send_async_complete(struct port100 *dev)
602{
603 struct port100_cmd *cmd = dev->cmd;
604 int status = cmd->status;
605
606 struct sk_buff *req = cmd->req;
607 struct sk_buff *resp = cmd->resp;
608
609 dev_kfree_skb(req);
610
611 dev->cmd = NULL;
612
613 if (status < 0) {
614 cmd->complete_cb(dev, cmd->complete_cb_context,
615 ERR_PTR(status));
616 dev_kfree_skb(resp);
617 goto done;
618 }
619
620 skb_put(resp, port100_rx_frame_size(resp->data));
621 skb_pull(resp, PORT100_FRAME_HEADER_LEN);
622 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
623
624 cmd->complete_cb(dev, cmd->complete_cb_context, resp);
625
626done:
627 kfree(cmd);
628}
629
630static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
631 struct sk_buff *req,
632 port100_send_async_complete_t complete_cb,
633 void *complete_cb_context)
634{
635 struct port100_cmd *cmd;
636 struct sk_buff *resp;
637 int rc;
638 int resp_len = PORT100_FRAME_HEADER_LEN +
639 PORT100_FRAME_MAX_PAYLOAD_LEN +
640 PORT100_FRAME_TAIL_LEN;
641
642 resp = alloc_skb(resp_len, GFP_KERNEL);
643 if (!resp)
644 return -ENOMEM;
645
646 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
647 if (!cmd) {
648 dev_kfree_skb(resp);
649 return -ENOMEM;
650 }
651
652 cmd->code = cmd_code;
653 cmd->req = req;
654 cmd->resp = resp;
655 cmd->resp_len = resp_len;
656 cmd->complete_cb = complete_cb;
657 cmd->complete_cb_context = complete_cb_context;
658
659 port100_build_cmd_frame(dev, cmd_code, req);
660
661 dev->cmd = cmd;
662
663 rc = port100_send_frame_async(dev, req, resp, resp_len);
664 if (rc) {
665 kfree(cmd);
666 dev_kfree_skb(resp);
667 dev->cmd = NULL;
668 }
669
670 return rc;
671}
672
673struct port100_sync_cmd_response {
674 struct sk_buff *resp;
675 struct completion done;
676};
677
678static void port100_wq_cmd_complete(struct work_struct *work)
679{
680 struct port100 *dev = container_of(work, struct port100,
681 cmd_complete_work);
682
683 port100_send_async_complete(dev);
684}
685
686static void port100_send_sync_complete(struct port100 *dev, void *_arg,
687 struct sk_buff *resp)
688{
689 struct port100_sync_cmd_response *arg = _arg;
690
691 arg->resp = resp;
692 complete(&arg->done);
693}
694
695static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
696 struct sk_buff *req)
697{
698 int rc;
699 struct port100_sync_cmd_response arg;
700
701 init_completion(&arg.done);
702
703 rc = port100_send_cmd_async(dev, cmd_code, req,
704 port100_send_sync_complete, &arg);
705 if (rc) {
706 dev_kfree_skb(req);
707 return ERR_PTR(rc);
708 }
709
710 wait_for_completion(&arg.done);
711
712 return arg.resp;
713}
714
715static void port100_send_complete(struct urb *urb)
716{
717 struct port100 *dev = urb->context;
718
719 switch (urb->status) {
720 case 0:
721 break; /* success */
722 case -ECONNRESET:
723 case -ENOENT:
724 nfc_err(&dev->interface->dev,
725 "The urb has been stopped (status %d)", urb->status);
726 break;
727 case -ESHUTDOWN:
728 default:
729 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
730 urb->status);
731 }
732}
733
562d4d59
TE		 734static void port100_abort_cmd(struct nfc_digital_dev *ddev)
735{
0347a6ab
TE		 736 struct port100 *dev = nfc_digital_get_drvdata(ddev);
737
738 /* An ack will cancel the last issued command */
739 port100_send_ack(dev);
740
741 /* cancel the urb request */
742 usb_kill_urb(dev->in_urb);
743}
744
745static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
746{
747 struct sk_buff *skb;
748
749 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
750 GFP_KERNEL);
751 if (skb)
752 skb_reserve(skb, dev->skb_headroom);
753
754 return skb;
755}
756
757static int port100_set_command_type(struct port100 *dev, u8 command_type)
758{
759 struct sk_buff *skb;
760 struct sk_buff *resp;
761 int rc;
762
763 skb = port100_alloc_skb(dev, 1);
764 if (!skb)
765 return -ENOMEM;
766
767 *skb_put(skb, sizeof(u8)) = command_type;
768
769 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
770 if (IS_ERR(resp))
771 return PTR_ERR(resp);
772
773 rc = resp->data[0];
774
775 dev_kfree_skb(resp);
776
777 return rc;
778}
779
780static u64 port100_get_command_type_mask(struct port100 *dev)
781{
782 struct sk_buff *skb;
783 struct sk_buff *resp;
784 u64 mask;
785
786 skb = port100_alloc_skb(dev, 0);
787 if (!skb)
788 return -ENOMEM;
789
790 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
791 if (IS_ERR(resp))
792 return PTR_ERR(resp);
793
794 if (resp->len < 8)
795 mask = 0;
796 else
797 mask = be64_to_cpu(*(__be64 *)resp->data);
798
799 dev_kfree_skb(resp);
800
801 return mask;
802}
803
804static u16 port100_get_firmware_version(struct port100 *dev)
805{
806 struct sk_buff *skb;
807 struct sk_buff *resp;
808 u16 fw_ver;
809
810 skb = port100_alloc_skb(dev, 0);
811 if (!skb)
812 return 0;
813
814 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
815 skb);
816 if (IS_ERR(resp))
817 return 0;
818
819 fw_ver = le16_to_cpu(*(__le16 *)resp->data);
820
821 dev_kfree_skb(resp);
822
823 return fw_ver;
562d4d59
TE		 824}
825
826static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
827{
9f7b57f2
TE		 828 struct port100 *dev = nfc_digital_get_drvdata(ddev);
829 struct sk_buff *skb, *resp;
830
831 skb = port100_alloc_skb(dev, 1);
832 if (!skb)
833 return -ENOMEM;
834
835 *skb_put(skb, 1) = on ? 1 : 0;
836
837 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
838
839 if (IS_ERR(resp))
840 return PTR_ERR(resp);
841
842 dev_kfree_skb(resp);
843
844 return 0;
845}
846
847static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
848{
849 struct port100 *dev = nfc_digital_get_drvdata(ddev);
850 struct sk_buff *skb;
851 struct sk_buff *resp;
852 int rc;
853
854 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
855 return -EINVAL;
856
857 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
858 if (!skb)
859 return -ENOMEM;
860
861 memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)),
862 &in_rf_settings[rf],
863 sizeof(struct port100_in_rf_setting));
864
865 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
866
867 if (IS_ERR(resp))
868 return PTR_ERR(resp);
869
870 rc = resp->data[0];
871
872 dev_kfree_skb(resp);
873
874 return rc;
875}
876
877static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
878{
879 struct port100 *dev = nfc_digital_get_drvdata(ddev);
880 struct port100_protocol *protocols;
881 struct sk_buff *skb;
882 struct sk_buff *resp;
883 int num_protocols;
884 size_t size;
885 int rc;
886
887 if (param >= NFC_DIGITAL_FRAMING_LAST)
888 return -EINVAL;
889
890 protocols = in_protocols[param];
891
892 num_protocols = 0;
893 while (protocols[num_protocols].number != PORT100_IN_PROT_END)
894 num_protocols++;
895
896 if (!num_protocols)
897 return 0;
898
899 size = sizeof(struct port100_protocol) * num_protocols;
900
901 skb = port100_alloc_skb(dev, size);
902 if (!skb)
903 return -ENOMEM;
904
905 memcpy(skb_put(skb, size), protocols, size);
906
907 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
908
909 if (IS_ERR(resp))
910 return PTR_ERR(resp);
911
912 rc = resp->data[0];
913
914 dev_kfree_skb(resp);
915
916 return rc;
562d4d59
TE		 917}
918
919static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
920 int param)
921{
9f7b57f2
TE		 922 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
923 return port100_in_set_rf(ddev, param);
924
925 if (type == NFC_DIGITAL_CONFIG_FRAMING)
926 return port100_in_set_framing(ddev, param);
927
928 return -EINVAL;
929}
930
931static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
932 struct sk_buff *resp)
933{
934 struct port100_cb_arg *cb_arg = arg;
935 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
936 u32 status;
937 int rc;
938
939 if (IS_ERR(resp)) {
940 rc = PTR_ERR(resp);
941 goto exit;
942 }
943
944 if (resp->len < 4) {
945 nfc_err(&dev->interface->dev,
946 "Invalid packet length received.\n");
947 rc = -EIO;
948 goto error;
949 }
950
951 status = le32_to_cpu(*(__le32 *)resp->data);
952
953 skb_pull(resp, sizeof(u32));
954
955 if (status == PORT100_CMD_STATUS_TIMEOUT) {
956 rc = -ETIMEDOUT;
957 goto error;
958 }
959
960 if (status != PORT100_CMD_STATUS_OK) {
961 nfc_err(&dev->interface->dev,
962 "in_comm_rf failed with status 0x%08x\n", status);
963 rc = -EIO;
964 goto error;
965 }
966
967 /* Remove collision bits byte */
968 skb_pull(resp, 1);
969
970 goto exit;
971
972error:
973 kfree_skb(resp);
974 resp = ERR_PTR(rc);
975
976exit:
977 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
978
979 kfree(cb_arg);
562d4d59
TE		 980}
981
982static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
983 struct sk_buff *skb, u16 _timeout,
984 nfc_digital_cmd_complete_t cb, void *arg)
985{
9f7b57f2
TE		 986 struct port100 *dev = nfc_digital_get_drvdata(ddev);
987 struct port100_cb_arg *cb_arg;
988 __le16 timeout;
989
990 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
991 if (!cb_arg)
992 return -ENOMEM;
993
994 cb_arg->complete_cb = cb;
995 cb_arg->complete_arg = arg;
996
997 timeout = cpu_to_le16(_timeout * 10);
998
999 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1000
1001 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1002 port100_in_comm_rf_complete, cb_arg);
562d4d59
TE		 1003}
1004
1005static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1006 int param)
1007{
1008 return -EOPNOTSUPP;
1009}
1010
1011static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1012 struct sk_buff *skb, u16 timeout,
1013 nfc_digital_cmd_complete_t cb, void *arg)
1014{
1015 return -EOPNOTSUPP;
1016}
1017
1018static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1019 struct digital_tg_mdaa_params *params,
1020 u16 timeout,
1021 nfc_digital_cmd_complete_t cb, void *arg)
1022{
1023 return -EOPNOTSUPP;
1024}
1025
1026static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1027 nfc_digital_cmd_complete_t cb, void *arg)
1028{
1029 return -EOPNOTSUPP;
1030}
1031
1032static struct nfc_digital_ops port100_digital_ops = {
1033 .in_configure_hw = port100_in_configure_hw,
1034 .in_send_cmd = port100_in_send_cmd,
1035
1036 .tg_listen_mdaa = port100_listen_mdaa,
1037 .tg_listen = port100_listen,
1038 .tg_configure_hw = port100_tg_configure_hw,
1039 .tg_send_cmd = port100_tg_send_cmd,
1040
1041 .switch_rf = port100_switch_rf,
1042 .abort_cmd = port100_abort_cmd,
1043};
1044
1045static const struct usb_device_id port100_table[] = {
1046 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
1047 .idVendor = SONY_VENDOR_ID,
1048 .idProduct = RCS380_PRODUCT_ID,
1049 },
1050 { }
1051};
1052MODULE_DEVICE_TABLE(usb, port100_table);
1053
1054static int port100_probe(struct usb_interface *interface,
1055 const struct usb_device_id *id)
1056{
1057 struct port100 *dev;
1058 int rc;
0347a6ab
TE		 1059 struct usb_host_interface *iface_desc;
1060 struct usb_endpoint_descriptor *endpoint;
1061 int in_endpoint;
1062 int out_endpoint;
1063 u16 fw_version;
1064 u64 cmd_type_mask;
1065 int i;
562d4d59
TE		 1066
1067 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1068 if (!dev)
1069 return -ENOMEM;
1070
1071 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1072 dev->interface = interface;
1073 usb_set_intfdata(interface, dev);
1074
0347a6ab
TE		 1075 in_endpoint = out_endpoint = 0;
1076 iface_desc = interface->cur_altsetting;
1077 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1078 endpoint = &iface_desc->endpoint[i].desc;
1079
1080 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1081 in_endpoint = endpoint->bEndpointAddress;
1082
1083 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1084 out_endpoint = endpoint->bEndpointAddress;
1085 }
1086
1087 if (!in_endpoint || !out_endpoint) {
1088 nfc_err(&interface->dev,
1089 "Could not find bulk-in or bulk-out endpoint\n");
1090 rc = -ENODEV;
1091 goto error;
1092 }
1093
1094 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1095 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1096
1097 if (!dev->in_urb || !dev->out_urb) {
1098 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1099 rc = -ENOMEM;
1100 goto error;
1101 }
1102
1103 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1104 usb_rcvbulkpipe(dev->udev, in_endpoint),
1105 NULL, 0, NULL, dev);
1106 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1107 usb_sndbulkpipe(dev->udev, out_endpoint),
1108 NULL, 0, port100_send_complete, dev);
1109
1110 dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1111 PORT100_COMM_RF_HEAD_MAX_LEN;
1112 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1113
1114 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1115
1116 /* The first thing to do with the Port-100 is to set the command type
1117 * to be used. If supported we use command type 1. 0 otherwise.
1118 */
1119 cmd_type_mask = port100_get_command_type_mask(dev);
1120 if (!cmd_type_mask) {
1121 nfc_err(&interface->dev,
1122 "Could not get supported command types.\n");
1123 rc = -ENODEV;
1124 goto error;
1125 }
1126
1127 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1128 dev->cmd_type = PORT100_CMD_TYPE_1;
1129 else
1130 dev->cmd_type = PORT100_CMD_TYPE_0;
1131
1132 rc = port100_set_command_type(dev, dev->cmd_type);
1133 if (rc) {
1134 nfc_err(&interface->dev,
1135 "The device does not support command type %u.\n",
1136 dev->cmd_type);
1137 goto error;
1138 }
1139
1140 fw_version = port100_get_firmware_version(dev);
1141 if (!fw_version)
1142 nfc_err(&interface->dev,
1143 "Could not get device firmware version.\n");
1144
1145 nfc_info(&interface->dev,
1146 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1147 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
562d4d59
TE		 1148
1149 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1150 PORT100_PROTOCOLS,
1151 PORT100_CAPABILITIES,
1152 dev->skb_headroom,
1153 dev->skb_tailroom);
1154 if (!dev->nfc_digital_dev) {
1155 nfc_err(&interface->dev,
1156 "Could not allocate nfc_digital_dev.\n");
1157 rc = -ENOMEM;
1158 goto error;
1159 }
1160
1161 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1162 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1163
1164 rc = nfc_digital_register_device(dev->nfc_digital_dev);
1165 if (rc) {
1166 nfc_err(&interface->dev,
1167 "Could not register digital device.\n");
1168 goto free_nfc_dev;
1169 }
1170
1171 return 0;
1172
1173free_nfc_dev:
1174 nfc_digital_free_device(dev->nfc_digital_dev);
1175
1176error:
0347a6ab
TE		 1177 usb_free_urb(dev->in_urb);
1178 usb_free_urb(dev->out_urb);
1179 usb_put_dev(dev->udev);
1180
562d4d59
TE		 1181 return rc;
1182}
1183
1184static void port100_disconnect(struct usb_interface *interface)
1185{
1186 struct port100 *dev;
1187
1188 dev = usb_get_intfdata(interface);
1189 usb_set_intfdata(interface, NULL);
1190
1191 nfc_digital_unregister_device(dev->nfc_digital_dev);
1192 nfc_digital_free_device(dev->nfc_digital_dev);
1193
0347a6ab
TE		 1194 usb_kill_urb(dev->in_urb);
1195 usb_kill_urb(dev->out_urb);
1196
1197 usb_free_urb(dev->in_urb);
1198 usb_free_urb(dev->out_urb);
1199
1200 kfree(dev->cmd);
1201
562d4d59
TE		 1202 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected");
1203}
1204
1205static struct usb_driver port100_driver = {
1206 .name = "port100",
1207 .probe = port100_probe,
1208 .disconnect = port100_disconnect,
1209 .id_table = port100_table,
1210};
1211
1212module_usb_driver(port100_driver);
1213
1214MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1215MODULE_VERSION(VERSION);
1216MODULE_LICENSE("GPL");
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