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NFC: digital: Add ISO-DEP support for data exchange
[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
7227c021
TE		 78#define PORT100_CMD_TG_SET_RF 0x40
79#define PORT100_CMD_TG_SET_PROTOCOL 0x42
80#define PORT100_CMD_TG_SET_RF_OFF 0x46
81#define PORT100_CMD_TG_COMM_RF 0x48
82
9f7b57f2
TE		 83#define PORT100_CMD_SWITCH_RF 0x06
84
0347a6ab
TE		 85#define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
86
87#define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
88 ((mask) & (0x01 << (cmd_type)))
89#define PORT100_CMD_TYPE_0 0
90#define PORT100_CMD_TYPE_1 1
91
9f7b57f2
TE		 92#define PORT100_CMD_STATUS_OK 0x00
93#define PORT100_CMD_STATUS_TIMEOUT 0x80
94
7227c021
TE		 95#define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
96#define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02
97
0347a6ab
TE		 98struct port100;
99
100typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
101 struct sk_buff *resp);
102
9f7b57f2
TE		 103/**
104 * Setting sets structure for in_set_rf command
105 *
106 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
107 * This table contains multiple RF setting sets required for RF
108 * communication.
109 *
110 * @in_*_comm_type: Theses fields set the communication type to be used.
111 */
112struct port100_in_rf_setting {
113 u8 in_send_set_number;
114 u8 in_send_comm_type;
115 u8 in_recv_set_number;
116 u8 in_recv_comm_type;
117} __packed;
118
119#define PORT100_COMM_TYPE_IN_212F 0x01
120#define PORT100_COMM_TYPE_IN_424F 0x02
121#define PORT100_COMM_TYPE_IN_106A 0x03
122
123static const struct port100_in_rf_setting in_rf_settings[] = {
124 [NFC_DIGITAL_RF_TECH_212F] = {
125 .in_send_set_number = 1,
126 .in_send_comm_type = PORT100_COMM_TYPE_IN_212F,
127 .in_recv_set_number = 15,
128 .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F,
129 },
130 [NFC_DIGITAL_RF_TECH_424F] = {
131 .in_send_set_number = 1,
132 .in_send_comm_type = PORT100_COMM_TYPE_IN_424F,
133 .in_recv_set_number = 15,
134 .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F,
135 },
136 [NFC_DIGITAL_RF_TECH_106A] = {
137 .in_send_set_number = 2,
138 .in_send_comm_type = PORT100_COMM_TYPE_IN_106A,
139 .in_recv_set_number = 15,
140 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A,
141 },
d3815ea9
TE		 142 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
143 [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
9f7b57f2
TE		 144};
145
7227c021
TE		 146/**
147 * Setting sets structure for tg_set_rf command
148 *
149 * @tg_set_number: Represents the entry index in the port-100 RF Base Table.
150 * This table contains multiple RF setting sets required for RF
151 * communication. this field is used for both send and receive
152 * settings.
153 *
154 * @tg_comm_type: Sets the communication type to be used to send and receive
155 * data.
156 */
157struct port100_tg_rf_setting {
158 u8 tg_set_number;
159 u8 tg_comm_type;
160} __packed;
161
162#define PORT100_COMM_TYPE_TG_106A 0x0B
163#define PORT100_COMM_TYPE_TG_212F 0x0C
164#define PORT100_COMM_TYPE_TG_424F 0x0D
165
166static const struct port100_tg_rf_setting tg_rf_settings[] = {
167 [NFC_DIGITAL_RF_TECH_106A] = {
168 .tg_set_number = 8,
169 .tg_comm_type = PORT100_COMM_TYPE_TG_106A,
170 },
171 [NFC_DIGITAL_RF_TECH_212F] = {
172 .tg_set_number = 8,
173 .tg_comm_type = PORT100_COMM_TYPE_TG_212F,
174 },
175 [NFC_DIGITAL_RF_TECH_424F] = {
176 .tg_set_number = 8,
177 .tg_comm_type = PORT100_COMM_TYPE_TG_424F,
178 },
d3815ea9
TE		 179 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
180 [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
181
7227c021
TE		 182};
183
9f7b57f2
TE		 184#define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
185#define PORT100_IN_PROT_ADD_CRC 0x01
186#define PORT100_IN_PROT_CHECK_CRC 0x02
187#define PORT100_IN_PROT_MULTI_CARD 0x03
188#define PORT100_IN_PROT_ADD_PARITY 0x04
189#define PORT100_IN_PROT_CHECK_PARITY 0x05
190#define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06
191#define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07
192#define PORT100_IN_PROT_CRYPTO1 0x08
193#define PORT100_IN_PROT_ADD_SOF 0x09
194#define PORT100_IN_PROT_CHECK_SOF 0x0A
195#define PORT100_IN_PROT_ADD_EOF 0x0B
196#define PORT100_IN_PROT_CHECK_EOF 0x0C
197#define PORT100_IN_PROT_DEAF_TIME 0x0E
198#define PORT100_IN_PROT_CRM 0x0F
199#define PORT100_IN_PROT_CRM_MIN_LEN 0x10
200#define PORT100_IN_PROT_T1_TAG_FRAME 0x11
201#define PORT100_IN_PROT_RFCA 0x12
202#define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
203#define PORT100_IN_PROT_END 0x14
204
205#define PORT100_IN_MAX_NUM_PROTOCOLS 19
206
7227c021
TE		 207#define PORT100_TG_PROT_TU 0x00
208#define PORT100_TG_PROT_RF_OFF 0x01
209#define PORT100_TG_PROT_CRM 0x02
210#define PORT100_TG_PROT_END 0x03
211
212#define PORT100_TG_MAX_NUM_PROTOCOLS 3
213
9f7b57f2
TE		 214struct port100_protocol {
215 u8 number;
216 u8 value;
217} __packed;
218
219static struct port100_protocol
220in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
221 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
222 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
223 { PORT100_IN_PROT_ADD_CRC, 0 },
224 { PORT100_IN_PROT_CHECK_CRC, 0 },
225 { PORT100_IN_PROT_MULTI_CARD, 0 },
226 { PORT100_IN_PROT_ADD_PARITY, 0 },
227 { PORT100_IN_PROT_CHECK_PARITY, 1 },
228 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
229 { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 },
230 { PORT100_IN_PROT_CRYPTO1, 0 },
231 { PORT100_IN_PROT_ADD_SOF, 0 },
232 { PORT100_IN_PROT_CHECK_SOF, 0 },
233 { PORT100_IN_PROT_ADD_EOF, 0 },
234 { PORT100_IN_PROT_CHECK_EOF, 0 },
235 { PORT100_IN_PROT_DEAF_TIME, 4 },
236 { PORT100_IN_PROT_CRM, 0 },
237 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
238 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
239 { PORT100_IN_PROT_RFCA, 0 },
240 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
241 { PORT100_IN_PROT_END, 0 },
242 },
243 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
244 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
245 { PORT100_IN_PROT_ADD_CRC, 0 },
246 { PORT100_IN_PROT_CHECK_CRC, 0 },
247 { PORT100_IN_PROT_MULTI_CARD, 0 },
248 { PORT100_IN_PROT_ADD_PARITY, 1 },
249 { PORT100_IN_PROT_CHECK_PARITY, 1 },
250 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
251 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
252 { PORT100_IN_PROT_CRYPTO1, 0 },
253 { PORT100_IN_PROT_ADD_SOF, 0 },
254 { PORT100_IN_PROT_CHECK_SOF, 0 },
255 { PORT100_IN_PROT_ADD_EOF, 0 },
256 { PORT100_IN_PROT_CHECK_EOF, 0 },
257 { PORT100_IN_PROT_DEAF_TIME, 4 },
258 { PORT100_IN_PROT_CRM, 0 },
259 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
260 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
261 { PORT100_IN_PROT_RFCA, 0 },
262 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
263 { PORT100_IN_PROT_END, 0 },
264 },
265 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
266 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
267 { PORT100_IN_PROT_ADD_CRC, 1 },
268 { PORT100_IN_PROT_CHECK_CRC, 1 },
269 { PORT100_IN_PROT_MULTI_CARD, 0 },
270 { PORT100_IN_PROT_ADD_PARITY, 1 },
271 { PORT100_IN_PROT_CHECK_PARITY, 1 },
272 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
273 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
274 { PORT100_IN_PROT_CRYPTO1, 0 },
275 { PORT100_IN_PROT_ADD_SOF, 0 },
276 { PORT100_IN_PROT_CHECK_SOF, 0 },
277 { PORT100_IN_PROT_ADD_EOF, 0 },
278 { PORT100_IN_PROT_CHECK_EOF, 0 },
279 { PORT100_IN_PROT_DEAF_TIME, 4 },
280 { PORT100_IN_PROT_CRM, 0 },
281 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
282 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
283 { PORT100_IN_PROT_RFCA, 0 },
284 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
285 { PORT100_IN_PROT_END, 0 },
286 },
287 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
288 /* nfc_digital_framing_nfca_short */
289 { PORT100_IN_PROT_ADD_CRC, 2 },
290 { PORT100_IN_PROT_CHECK_CRC, 2 },
291 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
292 { PORT100_IN_PROT_T1_TAG_FRAME, 2 },
293 { PORT100_IN_PROT_END, 0 },
294 },
295 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
296 /* nfc_digital_framing_nfca_standard */
297 { PORT100_IN_PROT_ADD_CRC, 1 },
298 { PORT100_IN_PROT_CHECK_CRC, 0 },
299 { PORT100_IN_PROT_END, 0 },
300 },
301 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
302 /* nfc_digital_framing_nfca_standard */
303 { PORT100_IN_PROT_END, 0 },
304 },
305 [NFC_DIGITAL_FRAMING_NFCF] = {
306 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
307 { PORT100_IN_PROT_ADD_CRC, 1 },
308 { PORT100_IN_PROT_CHECK_CRC, 1 },
309 { PORT100_IN_PROT_MULTI_CARD, 0 },
310 { PORT100_IN_PROT_ADD_PARITY, 0 },
311 { PORT100_IN_PROT_CHECK_PARITY, 0 },
312 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
313 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
314 { PORT100_IN_PROT_CRYPTO1, 0 },
315 { PORT100_IN_PROT_ADD_SOF, 0 },
316 { PORT100_IN_PROT_CHECK_SOF, 0 },
317 { PORT100_IN_PROT_ADD_EOF, 0 },
318 { PORT100_IN_PROT_CHECK_EOF, 0 },
319 { PORT100_IN_PROT_DEAF_TIME, 4 },
320 { PORT100_IN_PROT_CRM, 0 },
321 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
322 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
323 { PORT100_IN_PROT_RFCA, 0 },
324 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
325 { PORT100_IN_PROT_END, 0 },
326 },
327 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
328 /* nfc_digital_framing_nfcf */
329 { PORT100_IN_PROT_END, 0 },
330 },
331 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
332 /* nfc_digital_framing_nfcf */
333 { PORT100_IN_PROT_END, 0 },
334 },
335 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
336 { PORT100_IN_PROT_END, 0 },
337 },
d3815ea9
TE		 338 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
339 [NFC_DIGITAL_FRAMING_LAST] = {
340 { PORT100_IN_PROT_END, 0 },
341 },
9f7b57f2
TE		 342};
343
7227c021
TE		 344static struct port100_protocol
345tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
346 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
347 { PORT100_TG_PROT_END, 0 },
348 },
349 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
350 { PORT100_TG_PROT_END, 0 },
351 },
352 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
353 { PORT100_TG_PROT_END, 0 },
354 },
355 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
356 { PORT100_TG_PROT_END, 0 },
357 },
358 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
359 { PORT100_TG_PROT_END, 0 },
360 },
361 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
362 { PORT100_TG_PROT_TU, 1 },
363 { PORT100_TG_PROT_RF_OFF, 0 },
364 { PORT100_TG_PROT_CRM, 7 },
365 { PORT100_TG_PROT_END, 0 },
366 },
367 [NFC_DIGITAL_FRAMING_NFCF] = {
368 { PORT100_TG_PROT_END, 0 },
369 },
370 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
371 { PORT100_TG_PROT_END, 0 },
372 },
373 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
374 { PORT100_TG_PROT_TU, 1 },
375 { PORT100_TG_PROT_RF_OFF, 0 },
376 { PORT100_TG_PROT_CRM, 7 },
377 { PORT100_TG_PROT_END, 0 },
378 },
379 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
380 { PORT100_TG_PROT_RF_OFF, 1 },
381 { PORT100_TG_PROT_END, 0 },
382 },
d3815ea9
TE		 383 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
384 [NFC_DIGITAL_FRAMING_LAST] = {
385 { PORT100_TG_PROT_END, 0 },
386 },
7227c021
TE		 387};
388
562d4d59
TE		 389struct port100 {
390 struct nfc_digital_dev *nfc_digital_dev;
391
392 int skb_headroom;
393 int skb_tailroom;
394
395 struct usb_device *udev;
396 struct usb_interface *interface;
0347a6ab
TE		 397
398 struct urb *out_urb;
399 struct urb *in_urb;
400
401 struct work_struct cmd_complete_work;
402
403 u8 cmd_type;
404
405 /* The digital stack serializes commands to be sent. There is no need
406 * for any queuing/locking mechanism at driver level.
407 */
408 struct port100_cmd *cmd;
409};
410
411struct port100_cmd {
412 u8 code;
413 int status;
414 struct sk_buff *req;
415 struct sk_buff *resp;
416 int resp_len;
417 port100_send_async_complete_t complete_cb;
418 void *complete_cb_context;
419};
420
421struct port100_frame {
422 u8 preamble;
423 __be16 start_frame;
424 __be16 extended_frame;
425 __le16 datalen;
426 u8 datalen_checksum;
427 u8 data[];
428} __packed;
429
430struct port100_ack_frame {
431 u8 preamble;
432 __be16 start_frame;
433 __be16 ack_frame;
434 u8 postambule;
435} __packed;
436
437struct port100_cb_arg {
438 nfc_digital_cmd_complete_t complete_cb;
439 void *complete_arg;
440 u8 mdaa;
562d4d59
TE		 441};
442
0347a6ab
TE		 443struct port100_tg_comm_rf_cmd {
444 __le16 guard_time;
445 __le16 send_timeout;
446 u8 mdaa;
447 u8 nfca_param[6];
448 u8 nfcf_param[18];
449 u8 mf_halted;
450 u8 arae_flag;
451 __le16 recv_timeout;
452 u8 data[];
453} __packed;
454
7227c021
TE		 455struct port100_tg_comm_rf_res {
456 u8 comm_type;
457 u8 ar_status;
458 u8 target_activated;
459 __le32 status;
460 u8 data[];
461} __packed;
462
0347a6ab
TE		 463/* The rule: value + checksum = 0 */
464static inline u8 port100_checksum(u16 value)
465{
466 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
467}
468
469/* The rule: sum(data elements) + checksum = 0 */
470static u8 port100_data_checksum(u8 *data, int datalen)
471{
472 u8 sum = 0;
473 int i;
474
475 for (i = 0; i < datalen; i++)
476 sum += data[i];
477
478 return port100_checksum(sum);
479}
480
481static void port100_tx_frame_init(void *_frame, u8 cmd_code)
482{
483 struct port100_frame *frame = _frame;
484
485 frame->preamble = 0;
486 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
487 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
488 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
489 PORT100_FRAME_CMD(frame) = cmd_code;
490 frame->datalen = cpu_to_le16(2);
491}
492
493static void port100_tx_frame_finish(void *_frame)
494{
495 struct port100_frame *frame = _frame;
496
497 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
498
499 PORT100_FRAME_CHECKSUM(frame) =
500 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
501
502 PORT100_FRAME_POSTAMBLE(frame) = 0;
503}
504
505static void port100_tx_update_payload_len(void *_frame, int len)
506{
507 struct port100_frame *frame = _frame;
508
509 frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len);
510}
511
512static bool port100_rx_frame_is_valid(void *_frame)
513{
514 u8 checksum;
515 struct port100_frame *frame = _frame;
516
517 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
518 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
519 return false;
520
521 checksum = port100_checksum(le16_to_cpu(frame->datalen));
522 if (checksum != frame->datalen_checksum)
523 return false;
524
525 checksum = port100_data_checksum(frame->data,
526 le16_to_cpu(frame->datalen));
527 if (checksum != PORT100_FRAME_CHECKSUM(frame))
528 return false;
529
530 return true;
531}
532
533static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
534{
535 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
536 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
537}
538
539static inline int port100_rx_frame_size(void *frame)
540{
541 struct port100_frame *f = frame;
542
543 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
544 PORT100_FRAME_TAIL_LEN;
545}
546
547static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
548{
549 struct port100_frame *f = frame;
550
551 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
552}
553
554static void port100_recv_response(struct urb *urb)
555{
556 struct port100 *dev = urb->context;
557 struct port100_cmd *cmd = dev->cmd;
558 u8 *in_frame;
559
560 cmd->status = urb->status;
561
562 switch (urb->status) {
563 case 0:
564 break; /* success */
565 case -ECONNRESET:
566 case -ENOENT:
567 nfc_err(&dev->interface->dev,
568 "The urb has been canceled (status %d)", urb->status);
569 goto sched_wq;
570 case -ESHUTDOWN:
571 default:
572 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
573 urb->status);
574 goto sched_wq;
575 }
576
577 in_frame = dev->in_urb->transfer_buffer;
578
579 if (!port100_rx_frame_is_valid(in_frame)) {
580 nfc_err(&dev->interface->dev, "Received an invalid frame");
581 cmd->status = -EIO;
582 goto sched_wq;
583 }
584
585 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
586 port100_rx_frame_size(in_frame), false);
587
588 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
589 nfc_err(&dev->interface->dev,
590 "It's not the response to the last command");
591 cmd->status = -EIO;
592 goto sched_wq;
593 }
594
595sched_wq:
596 schedule_work(&dev->cmd_complete_work);
597}
598
599static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
600{
601 dev->in_urb->complete = port100_recv_response;
602
603 return usb_submit_urb(dev->in_urb, flags);
604}
605
606static void port100_recv_ack(struct urb *urb)
607{
608 struct port100 *dev = urb->context;
609 struct port100_cmd *cmd = dev->cmd;
610 struct port100_ack_frame *in_frame;
611 int rc;
612
613 cmd->status = urb->status;
614
615 switch (urb->status) {
616 case 0:
617 break; /* success */
618 case -ECONNRESET:
619 case -ENOENT:
620 nfc_err(&dev->interface->dev,
621 "The urb has been stopped (status %d)", urb->status);
622 goto sched_wq;
623 case -ESHUTDOWN:
624 default:
625 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
626 urb->status);
627 goto sched_wq;
628 }
629
630 in_frame = dev->in_urb->transfer_buffer;
631
632 if (!port100_rx_frame_is_ack(in_frame)) {
633 nfc_err(&dev->interface->dev, "Received an invalid ack");
634 cmd->status = -EIO;
635 goto sched_wq;
636 }
637
638 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
639 if (rc) {
640 nfc_err(&dev->interface->dev,
641 "usb_submit_urb failed with result %d", rc);
642 cmd->status = rc;
643 goto sched_wq;
644 }
645
646 return;
647
648sched_wq:
649 schedule_work(&dev->cmd_complete_work);
650}
651
652static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
653{
654 dev->in_urb->complete = port100_recv_ack;
655
656 return usb_submit_urb(dev->in_urb, flags);
657}
658
659static int port100_send_ack(struct port100 *dev)
660{
661 int rc;
662
663 dev->out_urb->transfer_buffer = ack_frame;
664 dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
665 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
666
667 return rc;
668}
669
670static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
671 struct sk_buff *in, int in_len)
672{
673 int rc;
674
675 dev->out_urb->transfer_buffer = out->data;
676 dev->out_urb->transfer_buffer_length = out->len;
677
678 dev->in_urb->transfer_buffer = in->data;
679 dev->in_urb->transfer_buffer_length = in_len;
680
681 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
682 out->data, out->len, false);
683
684 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
685 if (rc)
686 return rc;
687
688 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
689 if (rc)
690 goto error;
691
692 return 0;
693
694error:
695 usb_unlink_urb(dev->out_urb);
696 return rc;
697}
698
699static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
700 struct sk_buff *skb)
701{
702 /* payload is already there, just update datalen */
703 int payload_len = skb->len;
704
705 skb_push(skb, PORT100_FRAME_HEADER_LEN);
706 skb_put(skb, PORT100_FRAME_TAIL_LEN);
707
708 port100_tx_frame_init(skb->data, cmd_code);
709 port100_tx_update_payload_len(skb->data, payload_len);
710 port100_tx_frame_finish(skb->data);
711}
712
713static void port100_send_async_complete(struct port100 *dev)
714{
715 struct port100_cmd *cmd = dev->cmd;
716 int status = cmd->status;
717
718 struct sk_buff *req = cmd->req;
719 struct sk_buff *resp = cmd->resp;
720
721 dev_kfree_skb(req);
722
723 dev->cmd = NULL;
724
725 if (status < 0) {
726 cmd->complete_cb(dev, cmd->complete_cb_context,
727 ERR_PTR(status));
728 dev_kfree_skb(resp);
729 goto done;
730 }
731
732 skb_put(resp, port100_rx_frame_size(resp->data));
733 skb_pull(resp, PORT100_FRAME_HEADER_LEN);
734 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
735
736 cmd->complete_cb(dev, cmd->complete_cb_context, resp);
737
738done:
739 kfree(cmd);
740}
741
742static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
743 struct sk_buff *req,
744 port100_send_async_complete_t complete_cb,
745 void *complete_cb_context)
746{
747 struct port100_cmd *cmd;
748 struct sk_buff *resp;
749 int rc;
750 int resp_len = PORT100_FRAME_HEADER_LEN +
751 PORT100_FRAME_MAX_PAYLOAD_LEN +
752 PORT100_FRAME_TAIL_LEN;
753
754 resp = alloc_skb(resp_len, GFP_KERNEL);
755 if (!resp)
756 return -ENOMEM;
757
758 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
759 if (!cmd) {
760 dev_kfree_skb(resp);
761 return -ENOMEM;
762 }
763
764 cmd->code = cmd_code;
765 cmd->req = req;
766 cmd->resp = resp;
767 cmd->resp_len = resp_len;
768 cmd->complete_cb = complete_cb;
769 cmd->complete_cb_context = complete_cb_context;
770
771 port100_build_cmd_frame(dev, cmd_code, req);
772
773 dev->cmd = cmd;
774
775 rc = port100_send_frame_async(dev, req, resp, resp_len);
776 if (rc) {
777 kfree(cmd);
778 dev_kfree_skb(resp);
779 dev->cmd = NULL;
780 }
781
782 return rc;
783}
784
785struct port100_sync_cmd_response {
786 struct sk_buff *resp;
787 struct completion done;
788};
789
790static void port100_wq_cmd_complete(struct work_struct *work)
791{
792 struct port100 *dev = container_of(work, struct port100,
793 cmd_complete_work);
794
795 port100_send_async_complete(dev);
796}
797
798static void port100_send_sync_complete(struct port100 *dev, void *_arg,
799 struct sk_buff *resp)
800{
801 struct port100_sync_cmd_response *arg = _arg;
802
803 arg->resp = resp;
804 complete(&arg->done);
805}
806
807static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
808 struct sk_buff *req)
809{
810 int rc;
811 struct port100_sync_cmd_response arg;
812
813 init_completion(&arg.done);
814
815 rc = port100_send_cmd_async(dev, cmd_code, req,
816 port100_send_sync_complete, &arg);
817 if (rc) {
818 dev_kfree_skb(req);
819 return ERR_PTR(rc);
820 }
821
822 wait_for_completion(&arg.done);
823
824 return arg.resp;
825}
826
827static void port100_send_complete(struct urb *urb)
828{
829 struct port100 *dev = urb->context;
830
831 switch (urb->status) {
832 case 0:
833 break; /* success */
834 case -ECONNRESET:
835 case -ENOENT:
836 nfc_err(&dev->interface->dev,
837 "The urb has been stopped (status %d)", urb->status);
838 break;
839 case -ESHUTDOWN:
840 default:
841 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
842 urb->status);
843 }
844}
845
562d4d59
TE		 846static void port100_abort_cmd(struct nfc_digital_dev *ddev)
847{
0347a6ab
TE		 848 struct port100 *dev = nfc_digital_get_drvdata(ddev);
849
850 /* An ack will cancel the last issued command */
851 port100_send_ack(dev);
852
853 /* cancel the urb request */
854 usb_kill_urb(dev->in_urb);
855}
856
857static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
858{
859 struct sk_buff *skb;
860
861 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
862 GFP_KERNEL);
863 if (skb)
864 skb_reserve(skb, dev->skb_headroom);
865
866 return skb;
867}
868
869static int port100_set_command_type(struct port100 *dev, u8 command_type)
870{
871 struct sk_buff *skb;
872 struct sk_buff *resp;
873 int rc;
874
875 skb = port100_alloc_skb(dev, 1);
876 if (!skb)
877 return -ENOMEM;
878
879 *skb_put(skb, sizeof(u8)) = command_type;
880
881 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
882 if (IS_ERR(resp))
883 return PTR_ERR(resp);
884
885 rc = resp->data[0];
886
887 dev_kfree_skb(resp);
888
889 return rc;
890}
891
892static u64 port100_get_command_type_mask(struct port100 *dev)
893{
894 struct sk_buff *skb;
895 struct sk_buff *resp;
896 u64 mask;
897
898 skb = port100_alloc_skb(dev, 0);
899 if (!skb)
900 return -ENOMEM;
901
902 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
903 if (IS_ERR(resp))
904 return PTR_ERR(resp);
905
906 if (resp->len < 8)
907 mask = 0;
908 else
909 mask = be64_to_cpu(*(__be64 *)resp->data);
910
911 dev_kfree_skb(resp);
912
913 return mask;
914}
915
916static u16 port100_get_firmware_version(struct port100 *dev)
917{
918 struct sk_buff *skb;
919 struct sk_buff *resp;
920 u16 fw_ver;
921
922 skb = port100_alloc_skb(dev, 0);
923 if (!skb)
924 return 0;
925
926 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
927 skb);
928 if (IS_ERR(resp))
929 return 0;
930
931 fw_ver = le16_to_cpu(*(__le16 *)resp->data);
932
933 dev_kfree_skb(resp);
934
935 return fw_ver;
562d4d59
TE		 936}
937
938static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
939{
9f7b57f2
TE		 940 struct port100 *dev = nfc_digital_get_drvdata(ddev);
941 struct sk_buff *skb, *resp;
942
943 skb = port100_alloc_skb(dev, 1);
944 if (!skb)
945 return -ENOMEM;
946
947 *skb_put(skb, 1) = on ? 1 : 0;
948
949 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
950
951 if (IS_ERR(resp))
952 return PTR_ERR(resp);
953
954 dev_kfree_skb(resp);
955
956 return 0;
957}
958
959static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
960{
961 struct port100 *dev = nfc_digital_get_drvdata(ddev);
962 struct sk_buff *skb;
963 struct sk_buff *resp;
964 int rc;
965
966 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
967 return -EINVAL;
968
969 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
970 if (!skb)
971 return -ENOMEM;
972
973 memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)),
974 &in_rf_settings[rf],
975 sizeof(struct port100_in_rf_setting));
976
977 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
978
979 if (IS_ERR(resp))
980 return PTR_ERR(resp);
981
982 rc = resp->data[0];
983
984 dev_kfree_skb(resp);
985
986 return rc;
987}
988
989static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
990{
991 struct port100 *dev = nfc_digital_get_drvdata(ddev);
992 struct port100_protocol *protocols;
993 struct sk_buff *skb;
994 struct sk_buff *resp;
995 int num_protocols;
996 size_t size;
997 int rc;
998
999 if (param >= NFC_DIGITAL_FRAMING_LAST)
1000 return -EINVAL;
1001
1002 protocols = in_protocols[param];
1003
1004 num_protocols = 0;
1005 while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1006 num_protocols++;
1007
1008 if (!num_protocols)
1009 return 0;
1010
1011 size = sizeof(struct port100_protocol) * num_protocols;
1012
1013 skb = port100_alloc_skb(dev, size);
1014 if (!skb)
1015 return -ENOMEM;
1016
1017 memcpy(skb_put(skb, size), protocols, size);
1018
1019 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1020
1021 if (IS_ERR(resp))
1022 return PTR_ERR(resp);
1023
1024 rc = resp->data[0];
1025
1026 dev_kfree_skb(resp);
1027
1028 return rc;
562d4d59
TE		 1029}
1030
1031static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1032 int param)
1033{
9f7b57f2
TE		 1034 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1035 return port100_in_set_rf(ddev, param);
1036
1037 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1038 return port100_in_set_framing(ddev, param);
1039
1040 return -EINVAL;
1041}
1042
1043static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1044 struct sk_buff *resp)
1045{
1046 struct port100_cb_arg *cb_arg = arg;
1047 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1048 u32 status;
1049 int rc;
1050
1051 if (IS_ERR(resp)) {
1052 rc = PTR_ERR(resp);
1053 goto exit;
1054 }
1055
1056 if (resp->len < 4) {
1057 nfc_err(&dev->interface->dev,
1058 "Invalid packet length received.\n");
1059 rc = -EIO;
1060 goto error;
1061 }
1062
1063 status = le32_to_cpu(*(__le32 *)resp->data);
1064
1065 skb_pull(resp, sizeof(u32));
1066
1067 if (status == PORT100_CMD_STATUS_TIMEOUT) {
1068 rc = -ETIMEDOUT;
1069 goto error;
1070 }
1071
1072 if (status != PORT100_CMD_STATUS_OK) {
1073 nfc_err(&dev->interface->dev,
1074 "in_comm_rf failed with status 0x%08x\n", status);
1075 rc = -EIO;
1076 goto error;
1077 }
1078
1079 /* Remove collision bits byte */
1080 skb_pull(resp, 1);
1081
1082 goto exit;
1083
1084error:
1085 kfree_skb(resp);
1086 resp = ERR_PTR(rc);
1087
1088exit:
1089 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1090
1091 kfree(cb_arg);
562d4d59
TE		 1092}
1093
1094static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1095 struct sk_buff *skb, u16 _timeout,
1096 nfc_digital_cmd_complete_t cb, void *arg)
1097{
9f7b57f2
TE		 1098 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1099 struct port100_cb_arg *cb_arg;
1100 __le16 timeout;
1101
1102 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1103 if (!cb_arg)
1104 return -ENOMEM;
1105
1106 cb_arg->complete_cb = cb;
1107 cb_arg->complete_arg = arg;
1108
1109 timeout = cpu_to_le16(_timeout * 10);
1110
1111 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1112
1113 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1114 port100_in_comm_rf_complete, cb_arg);
562d4d59
TE		 1115}
1116
7227c021
TE		 1117static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1118{
1119 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1120 struct sk_buff *skb;
1121 struct sk_buff *resp;
1122 int rc;
1123
1124 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1125 return -EINVAL;
1126
1127 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1128 if (!skb)
1129 return -ENOMEM;
1130
1131 memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)),
1132 &tg_rf_settings[rf],
1133 sizeof(struct port100_tg_rf_setting));
1134
1135 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
1136
1137 if (IS_ERR(resp))
1138 return PTR_ERR(resp);
1139
1140 rc = resp->data[0];
1141
1142 dev_kfree_skb(resp);
1143
1144 return rc;
1145}
1146
1147static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
1148{
1149 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1150 struct port100_protocol *protocols;
1151 struct sk_buff *skb;
1152 struct sk_buff *resp;
1153 int rc;
1154 int num_protocols;
1155 size_t size;
1156
1157 if (param >= NFC_DIGITAL_FRAMING_LAST)
1158 return -EINVAL;
1159
1160 protocols = tg_protocols[param];
1161
1162 num_protocols = 0;
1163 while (protocols[num_protocols].number != PORT100_TG_PROT_END)
1164 num_protocols++;
1165
1166 if (!num_protocols)
1167 return 0;
1168
1169 size = sizeof(struct port100_protocol) * num_protocols;
1170
1171 skb = port100_alloc_skb(dev, size);
1172 if (!skb)
1173 return -ENOMEM;
1174
1175 memcpy(skb_put(skb, size), protocols, size);
1176
1177 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
1178
1179 if (IS_ERR(resp))
1180 return PTR_ERR(resp);
1181
1182 rc = resp->data[0];
1183
1184 dev_kfree_skb(resp);
1185
1186 return rc;
1187}
1188
562d4d59
TE		 1189static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1190 int param)
1191{
7227c021
TE		 1192 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1193 return port100_tg_set_rf(ddev, param);
1194
1195 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1196 return port100_tg_set_framing(ddev, param);
1197
1198 return -EINVAL;
1199}
1200
1201static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
1202{
1203 u8 mask;
1204
1205 switch (dev->cmd_type) {
1206 case PORT100_CMD_TYPE_0:
1207 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
1208 break;
1209 case PORT100_CMD_TYPE_1:
1210 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
1211 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
1212 break;
1213 default:
1214 nfc_err(&dev->interface->dev, "Unknonwn command type.\n");
1215 return false;
1216 }
1217
1218 return ((tgt_activated & mask) == mask);
1219}
1220
1221static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
1222 struct sk_buff *resp)
1223{
1224 u32 status;
1225 struct port100_cb_arg *cb_arg = arg;
1226 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1227 struct port100_tg_comm_rf_res *hdr;
1228
1229 if (IS_ERR(resp))
1230 goto exit;
1231
1232 hdr = (struct port100_tg_comm_rf_res *)resp->data;
1233
1234 status = le32_to_cpu(hdr->status);
1235
1236 if (cb_arg->mdaa &&
1237 !port100_tg_target_activated(dev, hdr->target_activated)) {
1238 kfree_skb(resp);
1239 resp = ERR_PTR(-ETIMEDOUT);
1240
1241 goto exit;
1242 }
1243
1244 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
1245
1246 if (status != PORT100_CMD_STATUS_OK) {
1247 kfree_skb(resp);
1248
1249 if (status == PORT100_CMD_STATUS_TIMEOUT)
1250 resp = ERR_PTR(-ETIMEDOUT);
1251 else
1252 resp = ERR_PTR(-EIO);
1253 }
1254
1255exit:
1256 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1257
1258 kfree(cb_arg);
562d4d59
TE		 1259}
1260
1261static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1262 struct sk_buff *skb, u16 timeout,
1263 nfc_digital_cmd_complete_t cb, void *arg)
1264{
7227c021
TE		 1265 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1266 struct port100_tg_comm_rf_cmd *hdr;
1267 struct port100_cb_arg *cb_arg;
1268
1269 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1270 if (!cb_arg)
1271 return -ENOMEM;
1272
1273 cb_arg->complete_cb = cb;
1274 cb_arg->complete_arg = arg;
1275
1276 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1277
1278 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1279
1280 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1281 hdr->guard_time = cpu_to_le16(500);
1282 hdr->send_timeout = cpu_to_le16(0xFFFF);
1283 hdr->recv_timeout = cpu_to_le16(timeout);
1284
1285 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1286 port100_tg_comm_rf_complete, cb_arg);
562d4d59
TE		 1287}
1288
1289static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1290 struct digital_tg_mdaa_params *params,
1291 u16 timeout,
1292 nfc_digital_cmd_complete_t cb, void *arg)
1293{
7227c021
TE		 1294 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1295 struct port100_tg_comm_rf_cmd *hdr;
1296 struct port100_cb_arg *cb_arg;
1297 struct sk_buff *skb;
1298 int rc;
1299
1300 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1301 NFC_DIGITAL_RF_TECH_106A);
1302 if (rc)
1303 return rc;
1304
1305 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1306 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1307 if (rc)
1308 return rc;
1309
1310 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1311 if (!cb_arg)
1312 return -ENOMEM;
1313
1314 cb_arg->complete_cb = cb;
1315 cb_arg->complete_arg = arg;
1316 cb_arg->mdaa = 1;
1317
1318 skb = port100_alloc_skb(dev, 0);
1319 if (!skb) {
1320 kfree(cb_arg);
1321 return -ENOMEM;
1322 }
1323
1324 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1325 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1326
1327 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1328
1329 hdr->guard_time = 0;
1330 hdr->send_timeout = cpu_to_le16(0xFFFF);
1331 hdr->mdaa = 1;
1332 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
1333 hdr->nfca_param[1] = params->sens_res & 0xFF;
1334 memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
1335 hdr->nfca_param[5] = params->sel_res;
1336 memcpy(hdr->nfcf_param, params->nfcid2, 8);
1337 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
1338 hdr->nfcf_param[17] = params->sc & 0xFF;
1339 hdr->recv_timeout = cpu_to_le16(timeout);
1340
1341 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1342 port100_tg_comm_rf_complete, cb_arg);
562d4d59
TE		 1343}
1344
1345static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1346 nfc_digital_cmd_complete_t cb, void *arg)
1347{
7227c021
TE		 1348 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1349 struct sk_buff *skb;
1350
1351 skb = port100_alloc_skb(dev, 0);
1352 if (!skb)
1353 return -ENOMEM;
1354
1355 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
562d4d59
TE		 1356}
1357
1358static struct nfc_digital_ops port100_digital_ops = {
1359 .in_configure_hw = port100_in_configure_hw,
1360 .in_send_cmd = port100_in_send_cmd,
1361
1362 .tg_listen_mdaa = port100_listen_mdaa,
1363 .tg_listen = port100_listen,
1364 .tg_configure_hw = port100_tg_configure_hw,
1365 .tg_send_cmd = port100_tg_send_cmd,
1366
1367 .switch_rf = port100_switch_rf,
1368 .abort_cmd = port100_abort_cmd,
1369};
1370
1371static const struct usb_device_id port100_table[] = {
1372 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
1373 .idVendor = SONY_VENDOR_ID,
1374 .idProduct = RCS380_PRODUCT_ID,
1375 },
1376 { }
1377};
1378MODULE_DEVICE_TABLE(usb, port100_table);
1379
1380static int port100_probe(struct usb_interface *interface,
1381 const struct usb_device_id *id)
1382{
1383 struct port100 *dev;
1384 int rc;
0347a6ab
TE		 1385 struct usb_host_interface *iface_desc;
1386 struct usb_endpoint_descriptor *endpoint;
1387 int in_endpoint;
1388 int out_endpoint;
1389 u16 fw_version;
1390 u64 cmd_type_mask;
1391 int i;
562d4d59
TE		 1392
1393 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1394 if (!dev)
1395 return -ENOMEM;
1396
1397 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1398 dev->interface = interface;
1399 usb_set_intfdata(interface, dev);
1400
0347a6ab
TE		 1401 in_endpoint = out_endpoint = 0;
1402 iface_desc = interface->cur_altsetting;
1403 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1404 endpoint = &iface_desc->endpoint[i].desc;
1405
1406 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1407 in_endpoint = endpoint->bEndpointAddress;
1408
1409 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1410 out_endpoint = endpoint->bEndpointAddress;
1411 }
1412
1413 if (!in_endpoint || !out_endpoint) {
1414 nfc_err(&interface->dev,
1415 "Could not find bulk-in or bulk-out endpoint\n");
1416 rc = -ENODEV;
1417 goto error;
1418 }
1419
1420 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1421 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1422
1423 if (!dev->in_urb || !dev->out_urb) {
1424 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1425 rc = -ENOMEM;
1426 goto error;
1427 }
1428
1429 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1430 usb_rcvbulkpipe(dev->udev, in_endpoint),
1431 NULL, 0, NULL, dev);
1432 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1433 usb_sndbulkpipe(dev->udev, out_endpoint),
1434 NULL, 0, port100_send_complete, dev);
1435
1436 dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1437 PORT100_COMM_RF_HEAD_MAX_LEN;
1438 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1439
1440 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1441
1442 /* The first thing to do with the Port-100 is to set the command type
1443 * to be used. If supported we use command type 1. 0 otherwise.
1444 */
1445 cmd_type_mask = port100_get_command_type_mask(dev);
1446 if (!cmd_type_mask) {
1447 nfc_err(&interface->dev,
1448 "Could not get supported command types.\n");
1449 rc = -ENODEV;
1450 goto error;
1451 }
1452
1453 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1454 dev->cmd_type = PORT100_CMD_TYPE_1;
1455 else
1456 dev->cmd_type = PORT100_CMD_TYPE_0;
1457
1458 rc = port100_set_command_type(dev, dev->cmd_type);
1459 if (rc) {
1460 nfc_err(&interface->dev,
1461 "The device does not support command type %u.\n",
1462 dev->cmd_type);
1463 goto error;
1464 }
1465
1466 fw_version = port100_get_firmware_version(dev);
1467 if (!fw_version)
1468 nfc_err(&interface->dev,
1469 "Could not get device firmware version.\n");
1470
1471 nfc_info(&interface->dev,
1472 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1473 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
562d4d59
TE		 1474
1475 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1476 PORT100_PROTOCOLS,
1477 PORT100_CAPABILITIES,
1478 dev->skb_headroom,
1479 dev->skb_tailroom);
1480 if (!dev->nfc_digital_dev) {
1481 nfc_err(&interface->dev,
1482 "Could not allocate nfc_digital_dev.\n");
1483 rc = -ENOMEM;
1484 goto error;
1485 }
1486
1487 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1488 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1489
1490 rc = nfc_digital_register_device(dev->nfc_digital_dev);
1491 if (rc) {
1492 nfc_err(&interface->dev,
1493 "Could not register digital device.\n");
1494 goto free_nfc_dev;
1495 }
1496
1497 return 0;
1498
1499free_nfc_dev:
1500 nfc_digital_free_device(dev->nfc_digital_dev);
1501
1502error:
0347a6ab
TE		 1503 usb_free_urb(dev->in_urb);
1504 usb_free_urb(dev->out_urb);
1505 usb_put_dev(dev->udev);
1506
562d4d59
TE		 1507 return rc;
1508}
1509
1510static void port100_disconnect(struct usb_interface *interface)
1511{
1512 struct port100 *dev;
1513
1514 dev = usb_get_intfdata(interface);
1515 usb_set_intfdata(interface, NULL);
1516
1517 nfc_digital_unregister_device(dev->nfc_digital_dev);
1518 nfc_digital_free_device(dev->nfc_digital_dev);
1519
0347a6ab
TE		 1520 usb_kill_urb(dev->in_urb);
1521 usb_kill_urb(dev->out_urb);
1522
1523 usb_free_urb(dev->in_urb);
1524 usb_free_urb(dev->out_urb);
c36aeba8 1525 usb_put_dev(dev->udev);
0347a6ab
TE		 1526
1527 kfree(dev->cmd);
1528
562d4d59
TE		 1529 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected");
1530}
1531
1532static struct usb_driver port100_driver = {
1533 .name = "port100",
1534 .probe = port100_probe,
1535 .disconnect = port100_disconnect,
1536 .id_table = port100_table,
1537};
1538
1539module_usb_driver(port100_driver);
1540
1541MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1542MODULE_VERSION(VERSION);
1543MODULE_LICENSE("GPL");
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