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ext4: reduce contention on s_orphan_lock
[linux/fpc-iii.git] / drivers / nfc / port100.c
blobb7a372af5eb75c7a99a108e76faedd8c7bb7c1c4
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 NFC_PROTO_ISO14443_MASK)
32
33 #define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
34 NFC_DIGITAL_DRV_CAPS_TG_CRC)
35
36 /* Standard port100 frame definitions */
37 #define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \
38 + 2) /* data[0] CC, data[1] SCC */
39 #define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
40
41 #define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd))
42
43 /*
44 * Max extended frame payload len, excluding CC and SCC
45 * which are already in PORT100_FRAME_HEADER_LEN.
46 */
47 #define PORT100_FRAME_MAX_PAYLOAD_LEN 1001
48
49 #define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
50 Postamble (1) */
51 static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
52 0x00, 0x00, 0xff, 0x00, 0xff, 0x00
53 };
54
55 #define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)])
56 #define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1])
57
58 /* start of frame */
59 #define PORT100_FRAME_SOF 0x00FF
60 #define PORT100_FRAME_EXT 0xFFFF
61 #define PORT100_FRAME_ACK 0x00FF
62
63 /* Port-100 command: in or out */
64 #define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */
65 #define PORT100_FRAME_DIR_OUT 0xD6
66 #define PORT100_FRAME_DIR_IN 0xD7
67
68 /* Port-100 sub-command */
69 #define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */
70
71 #define PORT100_CMD_GET_FIRMWARE_VERSION 0x20
72 #define PORT100_CMD_GET_COMMAND_TYPE 0x28
73 #define PORT100_CMD_SET_COMMAND_TYPE 0x2A
74
75 #define PORT100_CMD_IN_SET_RF 0x00
76 #define PORT100_CMD_IN_SET_PROTOCOL 0x02
77 #define PORT100_CMD_IN_COMM_RF 0x04
78
79 #define PORT100_CMD_TG_SET_RF 0x40
80 #define PORT100_CMD_TG_SET_PROTOCOL 0x42
81 #define PORT100_CMD_TG_SET_RF_OFF 0x46
82 #define PORT100_CMD_TG_COMM_RF 0x48
83
84 #define PORT100_CMD_SWITCH_RF 0x06
85
86 #define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
87
88 #define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
89 ((mask) & (0x01 << (cmd_type)))
90 #define PORT100_CMD_TYPE_0 0
91 #define PORT100_CMD_TYPE_1 1
92
93 #define PORT100_CMD_STATUS_OK 0x00
94 #define PORT100_CMD_STATUS_TIMEOUT 0x80
95
96 #define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
97 #define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02
98
99 struct port100;
100
101 typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
102 struct sk_buff *resp);
103
104 /**
105 * Setting sets structure for in_set_rf command
106 *
107 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
108 * This table contains multiple RF setting sets required for RF
109 * communication.
110 *
111 * @in_*_comm_type: Theses fields set the communication type to be used.
112 */
113 struct port100_in_rf_setting {
114 u8 in_send_set_number;
115 u8 in_send_comm_type;
116 u8 in_recv_set_number;
117 u8 in_recv_comm_type;
118 } __packed;
119
120 #define PORT100_COMM_TYPE_IN_212F 0x01
121 #define PORT100_COMM_TYPE_IN_424F 0x02
122 #define PORT100_COMM_TYPE_IN_106A 0x03
123
124 static const struct port100_in_rf_setting in_rf_settings[] = {
125 [NFC_DIGITAL_RF_TECH_212F] = {
126 .in_send_set_number = 1,
127 .in_send_comm_type = PORT100_COMM_TYPE_IN_212F,
128 .in_recv_set_number = 15,
129 .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F,
130 },
131 [NFC_DIGITAL_RF_TECH_424F] = {
132 .in_send_set_number = 1,
133 .in_send_comm_type = PORT100_COMM_TYPE_IN_424F,
134 .in_recv_set_number = 15,
135 .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F,
136 },
137 [NFC_DIGITAL_RF_TECH_106A] = {
138 .in_send_set_number = 2,
139 .in_send_comm_type = PORT100_COMM_TYPE_IN_106A,
140 .in_recv_set_number = 15,
141 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A,
142 },
143 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
144 [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
145 };
146
147 /**
148 * Setting sets structure for tg_set_rf command
149 *
150 * @tg_set_number: Represents the entry index in the port-100 RF Base Table.
151 * This table contains multiple RF setting sets required for RF
152 * communication. this field is used for both send and receive
153 * settings.
154 *
155 * @tg_comm_type: Sets the communication type to be used to send and receive
156 * data.
157 */
158 struct port100_tg_rf_setting {
159 u8 tg_set_number;
160 u8 tg_comm_type;
161 } __packed;
162
163 #define PORT100_COMM_TYPE_TG_106A 0x0B
164 #define PORT100_COMM_TYPE_TG_212F 0x0C
165 #define PORT100_COMM_TYPE_TG_424F 0x0D
166
167 static const struct port100_tg_rf_setting tg_rf_settings[] = {
168 [NFC_DIGITAL_RF_TECH_106A] = {
169 .tg_set_number = 8,
170 .tg_comm_type = PORT100_COMM_TYPE_TG_106A,
171 },
172 [NFC_DIGITAL_RF_TECH_212F] = {
173 .tg_set_number = 8,
174 .tg_comm_type = PORT100_COMM_TYPE_TG_212F,
175 },
176 [NFC_DIGITAL_RF_TECH_424F] = {
177 .tg_set_number = 8,
178 .tg_comm_type = PORT100_COMM_TYPE_TG_424F,
179 },
180 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
181 [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
182
183 };
184
185 #define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
186 #define PORT100_IN_PROT_ADD_CRC 0x01
187 #define PORT100_IN_PROT_CHECK_CRC 0x02
188 #define PORT100_IN_PROT_MULTI_CARD 0x03
189 #define PORT100_IN_PROT_ADD_PARITY 0x04
190 #define PORT100_IN_PROT_CHECK_PARITY 0x05
191 #define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06
192 #define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07
193 #define PORT100_IN_PROT_CRYPTO1 0x08
194 #define PORT100_IN_PROT_ADD_SOF 0x09
195 #define PORT100_IN_PROT_CHECK_SOF 0x0A
196 #define PORT100_IN_PROT_ADD_EOF 0x0B
197 #define PORT100_IN_PROT_CHECK_EOF 0x0C
198 #define PORT100_IN_PROT_DEAF_TIME 0x0E
199 #define PORT100_IN_PROT_CRM 0x0F
200 #define PORT100_IN_PROT_CRM_MIN_LEN 0x10
201 #define PORT100_IN_PROT_T1_TAG_FRAME 0x11
202 #define PORT100_IN_PROT_RFCA 0x12
203 #define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
204 #define PORT100_IN_PROT_END 0x14
205
206 #define PORT100_IN_MAX_NUM_PROTOCOLS 19
207
208 #define PORT100_TG_PROT_TU 0x00
209 #define PORT100_TG_PROT_RF_OFF 0x01
210 #define PORT100_TG_PROT_CRM 0x02
211 #define PORT100_TG_PROT_END 0x03
212
213 #define PORT100_TG_MAX_NUM_PROTOCOLS 3
214
215 struct port100_protocol {
216 u8 number;
217 u8 value;
218 } __packed;
219
220 static struct port100_protocol
221 in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
222 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
223 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
224 { PORT100_IN_PROT_ADD_CRC, 0 },
225 { PORT100_IN_PROT_CHECK_CRC, 0 },
226 { PORT100_IN_PROT_MULTI_CARD, 0 },
227 { PORT100_IN_PROT_ADD_PARITY, 0 },
228 { PORT100_IN_PROT_CHECK_PARITY, 1 },
229 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
230 { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 },
231 { PORT100_IN_PROT_CRYPTO1, 0 },
232 { PORT100_IN_PROT_ADD_SOF, 0 },
233 { PORT100_IN_PROT_CHECK_SOF, 0 },
234 { PORT100_IN_PROT_ADD_EOF, 0 },
235 { PORT100_IN_PROT_CHECK_EOF, 0 },
236 { PORT100_IN_PROT_DEAF_TIME, 4 },
237 { PORT100_IN_PROT_CRM, 0 },
238 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
239 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
240 { PORT100_IN_PROT_RFCA, 0 },
241 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
242 { PORT100_IN_PROT_END, 0 },
243 },
244 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
245 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
246 { PORT100_IN_PROT_ADD_CRC, 0 },
247 { PORT100_IN_PROT_CHECK_CRC, 0 },
248 { PORT100_IN_PROT_MULTI_CARD, 0 },
249 { PORT100_IN_PROT_ADD_PARITY, 1 },
250 { PORT100_IN_PROT_CHECK_PARITY, 1 },
251 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
252 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
253 { PORT100_IN_PROT_CRYPTO1, 0 },
254 { PORT100_IN_PROT_ADD_SOF, 0 },
255 { PORT100_IN_PROT_CHECK_SOF, 0 },
256 { PORT100_IN_PROT_ADD_EOF, 0 },
257 { PORT100_IN_PROT_CHECK_EOF, 0 },
258 { PORT100_IN_PROT_DEAF_TIME, 4 },
259 { PORT100_IN_PROT_CRM, 0 },
260 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
261 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
262 { PORT100_IN_PROT_RFCA, 0 },
263 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
264 { PORT100_IN_PROT_END, 0 },
265 },
266 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
267 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
268 { PORT100_IN_PROT_ADD_CRC, 1 },
269 { PORT100_IN_PROT_CHECK_CRC, 1 },
270 { PORT100_IN_PROT_MULTI_CARD, 0 },
271 { PORT100_IN_PROT_ADD_PARITY, 1 },
272 { PORT100_IN_PROT_CHECK_PARITY, 1 },
273 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
274 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
275 { PORT100_IN_PROT_CRYPTO1, 0 },
276 { PORT100_IN_PROT_ADD_SOF, 0 },
277 { PORT100_IN_PROT_CHECK_SOF, 0 },
278 { PORT100_IN_PROT_ADD_EOF, 0 },
279 { PORT100_IN_PROT_CHECK_EOF, 0 },
280 { PORT100_IN_PROT_DEAF_TIME, 4 },
281 { PORT100_IN_PROT_CRM, 0 },
282 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
283 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
284 { PORT100_IN_PROT_RFCA, 0 },
285 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
286 { PORT100_IN_PROT_END, 0 },
287 },
288 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
289 /* nfc_digital_framing_nfca_short */
290 { PORT100_IN_PROT_ADD_CRC, 2 },
291 { PORT100_IN_PROT_CHECK_CRC, 2 },
292 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
293 { PORT100_IN_PROT_T1_TAG_FRAME, 2 },
294 { PORT100_IN_PROT_END, 0 },
295 },
296 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
297 /* nfc_digital_framing_nfca_standard */
298 { PORT100_IN_PROT_ADD_CRC, 1 },
299 { PORT100_IN_PROT_CHECK_CRC, 0 },
300 { PORT100_IN_PROT_END, 0 },
301 },
302 [NFC_DIGITAL_FRAMING_NFCA_T4T] = {
303 /* nfc_digital_framing_nfca_standard_with_crc_a */
304 { PORT100_IN_PROT_END, 0 },
305 },
306 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
307 /* nfc_digital_framing_nfca_standard */
308 { PORT100_IN_PROT_END, 0 },
309 },
310 [NFC_DIGITAL_FRAMING_NFCF] = {
311 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
312 { PORT100_IN_PROT_ADD_CRC, 1 },
313 { PORT100_IN_PROT_CHECK_CRC, 1 },
314 { PORT100_IN_PROT_MULTI_CARD, 0 },
315 { PORT100_IN_PROT_ADD_PARITY, 0 },
316 { PORT100_IN_PROT_CHECK_PARITY, 0 },
317 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
318 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
319 { PORT100_IN_PROT_CRYPTO1, 0 },
320 { PORT100_IN_PROT_ADD_SOF, 0 },
321 { PORT100_IN_PROT_CHECK_SOF, 0 },
322 { PORT100_IN_PROT_ADD_EOF, 0 },
323 { PORT100_IN_PROT_CHECK_EOF, 0 },
324 { PORT100_IN_PROT_DEAF_TIME, 4 },
325 { PORT100_IN_PROT_CRM, 0 },
326 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
327 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
328 { PORT100_IN_PROT_RFCA, 0 },
329 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
330 { PORT100_IN_PROT_END, 0 },
331 },
332 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
333 /* nfc_digital_framing_nfcf */
334 { PORT100_IN_PROT_END, 0 },
335 },
336 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
337 /* nfc_digital_framing_nfcf */
338 { PORT100_IN_PROT_END, 0 },
339 },
340 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
341 { PORT100_IN_PROT_END, 0 },
342 },
343 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
344 [NFC_DIGITAL_FRAMING_LAST] = {
345 { PORT100_IN_PROT_END, 0 },
346 },
347 };
348
349 static struct port100_protocol
350 tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
351 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
352 { PORT100_TG_PROT_END, 0 },
353 },
354 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
355 { PORT100_TG_PROT_END, 0 },
356 },
357 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
358 { PORT100_TG_PROT_END, 0 },
359 },
360 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
361 { PORT100_TG_PROT_END, 0 },
362 },
363 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
364 { PORT100_TG_PROT_END, 0 },
365 },
366 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
367 { PORT100_TG_PROT_TU, 1 },
368 { PORT100_TG_PROT_RF_OFF, 0 },
369 { PORT100_TG_PROT_CRM, 7 },
370 { PORT100_TG_PROT_END, 0 },
371 },
372 [NFC_DIGITAL_FRAMING_NFCF] = {
373 { PORT100_TG_PROT_END, 0 },
374 },
375 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
376 { PORT100_TG_PROT_END, 0 },
377 },
378 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
379 { PORT100_TG_PROT_TU, 1 },
380 { PORT100_TG_PROT_RF_OFF, 0 },
381 { PORT100_TG_PROT_CRM, 7 },
382 { PORT100_TG_PROT_END, 0 },
383 },
384 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
385 { PORT100_TG_PROT_RF_OFF, 1 },
386 { PORT100_TG_PROT_END, 0 },
387 },
388 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
389 [NFC_DIGITAL_FRAMING_LAST] = {
390 { PORT100_TG_PROT_END, 0 },
391 },
392 };
393
394 struct port100 {
395 struct nfc_digital_dev *nfc_digital_dev;
396
397 int skb_headroom;
398 int skb_tailroom;
399
400 struct usb_device *udev;
401 struct usb_interface *interface;
402
403 struct urb *out_urb;
404 struct urb *in_urb;
405
406 struct work_struct cmd_complete_work;
407
408 u8 cmd_type;
409
410 /* The digital stack serializes commands to be sent. There is no need
411 * for any queuing/locking mechanism at driver level.
412 */
413 struct port100_cmd *cmd;
414 };
415
416 struct port100_cmd {
417 u8 code;
418 int status;
419 struct sk_buff *req;
420 struct sk_buff *resp;
421 int resp_len;
422 port100_send_async_complete_t complete_cb;
423 void *complete_cb_context;
424 };
425
426 struct port100_frame {
427 u8 preamble;
428 __be16 start_frame;
429 __be16 extended_frame;
430 __le16 datalen;
431 u8 datalen_checksum;
432 u8 data[];
433 } __packed;
434
435 struct port100_ack_frame {
436 u8 preamble;
437 __be16 start_frame;
438 __be16 ack_frame;
439 u8 postambule;
440 } __packed;
441
442 struct port100_cb_arg {
443 nfc_digital_cmd_complete_t complete_cb;
444 void *complete_arg;
445 u8 mdaa;
446 };
447
448 struct port100_tg_comm_rf_cmd {
449 __le16 guard_time;
450 __le16 send_timeout;
451 u8 mdaa;
452 u8 nfca_param[6];
453 u8 nfcf_param[18];
454 u8 mf_halted;
455 u8 arae_flag;
456 __le16 recv_timeout;
457 u8 data[];
458 } __packed;
459
460 struct port100_tg_comm_rf_res {
461 u8 comm_type;
462 u8 ar_status;
463 u8 target_activated;
464 __le32 status;
465 u8 data[];
466 } __packed;
467
468 /* The rule: value + checksum = 0 */
469 static inline u8 port100_checksum(u16 value)
470 {
471 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
472 }
473
474 /* The rule: sum(data elements) + checksum = 0 */
475 static u8 port100_data_checksum(u8 *data, int datalen)
476 {
477 u8 sum = 0;
478 int i;
479
480 for (i = 0; i < datalen; i++)
481 sum += data[i];
482
483 return port100_checksum(sum);
484 }
485
486 static void port100_tx_frame_init(void *_frame, u8 cmd_code)
487 {
488 struct port100_frame *frame = _frame;
489
490 frame->preamble = 0;
491 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
492 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
493 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
494 PORT100_FRAME_CMD(frame) = cmd_code;
495 frame->datalen = cpu_to_le16(2);
496 }
497
498 static void port100_tx_frame_finish(void *_frame)
499 {
500 struct port100_frame *frame = _frame;
501
502 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
503
504 PORT100_FRAME_CHECKSUM(frame) =
505 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
506
507 PORT100_FRAME_POSTAMBLE(frame) = 0;
508 }
509
510 static void port100_tx_update_payload_len(void *_frame, int len)
511 {
512 struct port100_frame *frame = _frame;
513
514 frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len);
515 }
516
517 static bool port100_rx_frame_is_valid(void *_frame)
518 {
519 u8 checksum;
520 struct port100_frame *frame = _frame;
521
522 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
523 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
524 return false;
525
526 checksum = port100_checksum(le16_to_cpu(frame->datalen));
527 if (checksum != frame->datalen_checksum)
528 return false;
529
530 checksum = port100_data_checksum(frame->data,
531 le16_to_cpu(frame->datalen));
532 if (checksum != PORT100_FRAME_CHECKSUM(frame))
533 return false;
534
535 return true;
536 }
537
538 static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
539 {
540 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
541 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
542 }
543
544 static inline int port100_rx_frame_size(void *frame)
545 {
546 struct port100_frame *f = frame;
547
548 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
549 PORT100_FRAME_TAIL_LEN;
550 }
551
552 static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
553 {
554 struct port100_frame *f = frame;
555
556 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
557 }
558
559 static void port100_recv_response(struct urb *urb)
560 {
561 struct port100 *dev = urb->context;
562 struct port100_cmd *cmd = dev->cmd;
563 u8 *in_frame;
564
565 cmd->status = urb->status;
566
567 switch (urb->status) {
568 case 0:
569 break; /* success */
570 case -ECONNRESET:
571 case -ENOENT:
572 nfc_err(&dev->interface->dev,
573 "The urb has been canceled (status %d)", urb->status);
574 goto sched_wq;
575 case -ESHUTDOWN:
576 default:
577 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
578 urb->status);
579 goto sched_wq;
580 }
581
582 in_frame = dev->in_urb->transfer_buffer;
583
584 if (!port100_rx_frame_is_valid(in_frame)) {
585 nfc_err(&dev->interface->dev, "Received an invalid frame");
586 cmd->status = -EIO;
587 goto sched_wq;
588 }
589
590 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
591 port100_rx_frame_size(in_frame), false);
592
593 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
594 nfc_err(&dev->interface->dev,
595 "It's not the response to the last command");
596 cmd->status = -EIO;
597 goto sched_wq;
598 }
599
600 sched_wq:
601 schedule_work(&dev->cmd_complete_work);
602 }
603
604 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
605 {
606 dev->in_urb->complete = port100_recv_response;
607
608 return usb_submit_urb(dev->in_urb, flags);
609 }
610
611 static void port100_recv_ack(struct urb *urb)
612 {
613 struct port100 *dev = urb->context;
614 struct port100_cmd *cmd = dev->cmd;
615 struct port100_ack_frame *in_frame;
616 int rc;
617
618 cmd->status = urb->status;
619
620 switch (urb->status) {
621 case 0:
622 break; /* success */
623 case -ECONNRESET:
624 case -ENOENT:
625 nfc_err(&dev->interface->dev,
626 "The urb has been stopped (status %d)", urb->status);
627 goto sched_wq;
628 case -ESHUTDOWN:
629 default:
630 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
631 urb->status);
632 goto sched_wq;
633 }
634
635 in_frame = dev->in_urb->transfer_buffer;
636
637 if (!port100_rx_frame_is_ack(in_frame)) {
638 nfc_err(&dev->interface->dev, "Received an invalid ack");
639 cmd->status = -EIO;
640 goto sched_wq;
641 }
642
643 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
644 if (rc) {
645 nfc_err(&dev->interface->dev,
646 "usb_submit_urb failed with result %d", rc);
647 cmd->status = rc;
648 goto sched_wq;
649 }
650
651 return;
652
653 sched_wq:
654 schedule_work(&dev->cmd_complete_work);
655 }
656
657 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
658 {
659 dev->in_urb->complete = port100_recv_ack;
660
661 return usb_submit_urb(dev->in_urb, flags);
662 }
663
664 static int port100_send_ack(struct port100 *dev)
665 {
666 int rc;
667
668 dev->out_urb->transfer_buffer = ack_frame;
669 dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
670 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
671
672 return rc;
673 }
674
675 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
676 struct sk_buff *in, int in_len)
677 {
678 int rc;
679
680 dev->out_urb->transfer_buffer = out->data;
681 dev->out_urb->transfer_buffer_length = out->len;
682
683 dev->in_urb->transfer_buffer = in->data;
684 dev->in_urb->transfer_buffer_length = in_len;
685
686 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
687 out->data, out->len, false);
688
689 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
690 if (rc)
691 return rc;
692
693 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
694 if (rc)
695 goto error;
696
697 return 0;
698
699 error:
700 usb_unlink_urb(dev->out_urb);
701 return rc;
702 }
703
704 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
705 struct sk_buff *skb)
706 {
707 /* payload is already there, just update datalen */
708 int payload_len = skb->len;
709
710 skb_push(skb, PORT100_FRAME_HEADER_LEN);
711 skb_put(skb, PORT100_FRAME_TAIL_LEN);
712
713 port100_tx_frame_init(skb->data, cmd_code);
714 port100_tx_update_payload_len(skb->data, payload_len);
715 port100_tx_frame_finish(skb->data);
716 }
717
718 static void port100_send_async_complete(struct port100 *dev)
719 {
720 struct port100_cmd *cmd = dev->cmd;
721 int status = cmd->status;
722
723 struct sk_buff *req = cmd->req;
724 struct sk_buff *resp = cmd->resp;
725
726 dev_kfree_skb(req);
727
728 dev->cmd = NULL;
729
730 if (status < 0) {
731 cmd->complete_cb(dev, cmd->complete_cb_context,
732 ERR_PTR(status));
733 dev_kfree_skb(resp);
734 goto done;
735 }
736
737 skb_put(resp, port100_rx_frame_size(resp->data));
738 skb_pull(resp, PORT100_FRAME_HEADER_LEN);
739 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
740
741 cmd->complete_cb(dev, cmd->complete_cb_context, resp);
742
743 done:
744 kfree(cmd);
745 }
746
747 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
748 struct sk_buff *req,
749 port100_send_async_complete_t complete_cb,
750 void *complete_cb_context)
751 {
752 struct port100_cmd *cmd;
753 struct sk_buff *resp;
754 int rc;
755 int resp_len = PORT100_FRAME_HEADER_LEN +
756 PORT100_FRAME_MAX_PAYLOAD_LEN +
757 PORT100_FRAME_TAIL_LEN;
758
759 resp = alloc_skb(resp_len, GFP_KERNEL);
760 if (!resp)
761 return -ENOMEM;
762
763 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
764 if (!cmd) {
765 dev_kfree_skb(resp);
766 return -ENOMEM;
767 }
768
769 cmd->code = cmd_code;
770 cmd->req = req;
771 cmd->resp = resp;
772 cmd->resp_len = resp_len;
773 cmd->complete_cb = complete_cb;
774 cmd->complete_cb_context = complete_cb_context;
775
776 port100_build_cmd_frame(dev, cmd_code, req);
777
778 dev->cmd = cmd;
779
780 rc = port100_send_frame_async(dev, req, resp, resp_len);
781 if (rc) {
782 kfree(cmd);
783 dev_kfree_skb(resp);
784 dev->cmd = NULL;
785 }
786
787 return rc;
788 }
789
790 struct port100_sync_cmd_response {
791 struct sk_buff *resp;
792 struct completion done;
793 };
794
795 static void port100_wq_cmd_complete(struct work_struct *work)
796 {
797 struct port100 *dev = container_of(work, struct port100,
798 cmd_complete_work);
799
800 port100_send_async_complete(dev);
801 }
802
803 static void port100_send_sync_complete(struct port100 *dev, void *_arg,
804 struct sk_buff *resp)
805 {
806 struct port100_sync_cmd_response *arg = _arg;
807
808 arg->resp = resp;
809 complete(&arg->done);
810 }
811
812 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
813 struct sk_buff *req)
814 {
815 int rc;
816 struct port100_sync_cmd_response arg;
817
818 init_completion(&arg.done);
819
820 rc = port100_send_cmd_async(dev, cmd_code, req,
821 port100_send_sync_complete, &arg);
822 if (rc) {
823 dev_kfree_skb(req);
824 return ERR_PTR(rc);
825 }
826
827 wait_for_completion(&arg.done);
828
829 return arg.resp;
830 }
831
832 static void port100_send_complete(struct urb *urb)
833 {
834 struct port100 *dev = urb->context;
835
836 switch (urb->status) {
837 case 0:
838 break; /* success */
839 case -ECONNRESET:
840 case -ENOENT:
841 nfc_err(&dev->interface->dev,
842 "The urb has been stopped (status %d)", urb->status);
843 break;
844 case -ESHUTDOWN:
845 default:
846 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
847 urb->status);
848 }
849 }
850
851 static void port100_abort_cmd(struct nfc_digital_dev *ddev)
852 {
853 struct port100 *dev = nfc_digital_get_drvdata(ddev);
854
855 /* An ack will cancel the last issued command */
856 port100_send_ack(dev);
857
858 /* cancel the urb request */
859 usb_kill_urb(dev->in_urb);
860 }
861
862 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
863 {
864 struct sk_buff *skb;
865
866 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
867 GFP_KERNEL);
868 if (skb)
869 skb_reserve(skb, dev->skb_headroom);
870
871 return skb;
872 }
873
874 static int port100_set_command_type(struct port100 *dev, u8 command_type)
875 {
876 struct sk_buff *skb;
877 struct sk_buff *resp;
878 int rc;
879
880 skb = port100_alloc_skb(dev, 1);
881 if (!skb)
882 return -ENOMEM;
883
884 *skb_put(skb, sizeof(u8)) = command_type;
885
886 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
887 if (IS_ERR(resp))
888 return PTR_ERR(resp);
889
890 rc = resp->data[0];
891
892 dev_kfree_skb(resp);
893
894 return rc;
895 }
896
897 static u64 port100_get_command_type_mask(struct port100 *dev)
898 {
899 struct sk_buff *skb;
900 struct sk_buff *resp;
901 u64 mask;
902
903 skb = port100_alloc_skb(dev, 0);
904 if (!skb)
905 return -ENOMEM;
906
907 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
908 if (IS_ERR(resp))
909 return PTR_ERR(resp);
910
911 if (resp->len < 8)
912 mask = 0;
913 else
914 mask = be64_to_cpu(*(__be64 *)resp->data);
915
916 dev_kfree_skb(resp);
917
918 return mask;
919 }
920
921 static u16 port100_get_firmware_version(struct port100 *dev)
922 {
923 struct sk_buff *skb;
924 struct sk_buff *resp;
925 u16 fw_ver;
926
927 skb = port100_alloc_skb(dev, 0);
928 if (!skb)
929 return 0;
930
931 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
932 skb);
933 if (IS_ERR(resp))
934 return 0;
935
936 fw_ver = le16_to_cpu(*(__le16 *)resp->data);
937
938 dev_kfree_skb(resp);
939
940 return fw_ver;
941 }
942
943 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
944 {
945 struct port100 *dev = nfc_digital_get_drvdata(ddev);
946 struct sk_buff *skb, *resp;
947
948 skb = port100_alloc_skb(dev, 1);
949 if (!skb)
950 return -ENOMEM;
951
952 *skb_put(skb, 1) = on ? 1 : 0;
953
954 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
955
956 if (IS_ERR(resp))
957 return PTR_ERR(resp);
958
959 dev_kfree_skb(resp);
960
961 return 0;
962 }
963
964 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
965 {
966 struct port100 *dev = nfc_digital_get_drvdata(ddev);
967 struct sk_buff *skb;
968 struct sk_buff *resp;
969 int rc;
970
971 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
972 return -EINVAL;
973
974 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
975 if (!skb)
976 return -ENOMEM;
977
978 memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)),
979 &in_rf_settings[rf],
980 sizeof(struct port100_in_rf_setting));
981
982 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
983
984 if (IS_ERR(resp))
985 return PTR_ERR(resp);
986
987 rc = resp->data[0];
988
989 dev_kfree_skb(resp);
990
991 return rc;
992 }
993
994 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
995 {
996 struct port100 *dev = nfc_digital_get_drvdata(ddev);
997 struct port100_protocol *protocols;
998 struct sk_buff *skb;
999 struct sk_buff *resp;
1000 int num_protocols;
1001 size_t size;
1002 int rc;
1003
1004 if (param >= NFC_DIGITAL_FRAMING_LAST)
1005 return -EINVAL;
1006
1007 protocols = in_protocols[param];
1008
1009 num_protocols = 0;
1010 while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1011 num_protocols++;
1012
1013 if (!num_protocols)
1014 return 0;
1015
1016 size = sizeof(struct port100_protocol) * num_protocols;
1017
1018 skb = port100_alloc_skb(dev, size);
1019 if (!skb)
1020 return -ENOMEM;
1021
1022 memcpy(skb_put(skb, size), protocols, size);
1023
1024 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1025
1026 if (IS_ERR(resp))
1027 return PTR_ERR(resp);
1028
1029 rc = resp->data[0];
1030
1031 dev_kfree_skb(resp);
1032
1033 return rc;
1034 }
1035
1036 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1037 int param)
1038 {
1039 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1040 return port100_in_set_rf(ddev, param);
1041
1042 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1043 return port100_in_set_framing(ddev, param);
1044
1045 return -EINVAL;
1046 }
1047
1048 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1049 struct sk_buff *resp)
1050 {
1051 struct port100_cb_arg *cb_arg = arg;
1052 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1053 u32 status;
1054 int rc;
1055
1056 if (IS_ERR(resp)) {
1057 rc = PTR_ERR(resp);
1058 goto exit;
1059 }
1060
1061 if (resp->len < 4) {
1062 nfc_err(&dev->interface->dev,
1063 "Invalid packet length received.\n");
1064 rc = -EIO;
1065 goto error;
1066 }
1067
1068 status = le32_to_cpu(*(__le32 *)resp->data);
1069
1070 skb_pull(resp, sizeof(u32));
1071
1072 if (status == PORT100_CMD_STATUS_TIMEOUT) {
1073 rc = -ETIMEDOUT;
1074 goto error;
1075 }
1076
1077 if (status != PORT100_CMD_STATUS_OK) {
1078 nfc_err(&dev->interface->dev,
1079 "in_comm_rf failed with status 0x%08x\n", status);
1080 rc = -EIO;
1081 goto error;
1082 }
1083
1084 /* Remove collision bits byte */
1085 skb_pull(resp, 1);
1086
1087 goto exit;
1088
1089 error:
1090 kfree_skb(resp);
1091 resp = ERR_PTR(rc);
1092
1093 exit:
1094 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1095
1096 kfree(cb_arg);
1097 }
1098
1099 static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1100 struct sk_buff *skb, u16 _timeout,
1101 nfc_digital_cmd_complete_t cb, void *arg)
1102 {
1103 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1104 struct port100_cb_arg *cb_arg;
1105 __le16 timeout;
1106
1107 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1108 if (!cb_arg)
1109 return -ENOMEM;
1110
1111 cb_arg->complete_cb = cb;
1112 cb_arg->complete_arg = arg;
1113
1114 timeout = cpu_to_le16(_timeout * 10);
1115
1116 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1117
1118 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1119 port100_in_comm_rf_complete, cb_arg);
1120 }
1121
1122 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1123 {
1124 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1125 struct sk_buff *skb;
1126 struct sk_buff *resp;
1127 int rc;
1128
1129 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1130 return -EINVAL;
1131
1132 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1133 if (!skb)
1134 return -ENOMEM;
1135
1136 memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)),
1137 &tg_rf_settings[rf],
1138 sizeof(struct port100_tg_rf_setting));
1139
1140 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
1141
1142 if (IS_ERR(resp))
1143 return PTR_ERR(resp);
1144
1145 rc = resp->data[0];
1146
1147 dev_kfree_skb(resp);
1148
1149 return rc;
1150 }
1151
1152 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
1153 {
1154 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1155 struct port100_protocol *protocols;
1156 struct sk_buff *skb;
1157 struct sk_buff *resp;
1158 int rc;
1159 int num_protocols;
1160 size_t size;
1161
1162 if (param >= NFC_DIGITAL_FRAMING_LAST)
1163 return -EINVAL;
1164
1165 protocols = tg_protocols[param];
1166
1167 num_protocols = 0;
1168 while (protocols[num_protocols].number != PORT100_TG_PROT_END)
1169 num_protocols++;
1170
1171 if (!num_protocols)
1172 return 0;
1173
1174 size = sizeof(struct port100_protocol) * num_protocols;
1175
1176 skb = port100_alloc_skb(dev, size);
1177 if (!skb)
1178 return -ENOMEM;
1179
1180 memcpy(skb_put(skb, size), protocols, size);
1181
1182 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
1183
1184 if (IS_ERR(resp))
1185 return PTR_ERR(resp);
1186
1187 rc = resp->data[0];
1188
1189 dev_kfree_skb(resp);
1190
1191 return rc;
1192 }
1193
1194 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1195 int param)
1196 {
1197 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1198 return port100_tg_set_rf(ddev, param);
1199
1200 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1201 return port100_tg_set_framing(ddev, param);
1202
1203 return -EINVAL;
1204 }
1205
1206 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
1207 {
1208 u8 mask;
1209
1210 switch (dev->cmd_type) {
1211 case PORT100_CMD_TYPE_0:
1212 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
1213 break;
1214 case PORT100_CMD_TYPE_1:
1215 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
1216 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
1217 break;
1218 default:
1219 nfc_err(&dev->interface->dev, "Unknonwn command type.\n");
1220 return false;
1221 }
1222
1223 return ((tgt_activated & mask) == mask);
1224 }
1225
1226 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
1227 struct sk_buff *resp)
1228 {
1229 u32 status;
1230 struct port100_cb_arg *cb_arg = arg;
1231 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1232 struct port100_tg_comm_rf_res *hdr;
1233
1234 if (IS_ERR(resp))
1235 goto exit;
1236
1237 hdr = (struct port100_tg_comm_rf_res *)resp->data;
1238
1239 status = le32_to_cpu(hdr->status);
1240
1241 if (cb_arg->mdaa &&
1242 !port100_tg_target_activated(dev, hdr->target_activated)) {
1243 kfree_skb(resp);
1244 resp = ERR_PTR(-ETIMEDOUT);
1245
1246 goto exit;
1247 }
1248
1249 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
1250
1251 if (status != PORT100_CMD_STATUS_OK) {
1252 kfree_skb(resp);
1253
1254 if (status == PORT100_CMD_STATUS_TIMEOUT)
1255 resp = ERR_PTR(-ETIMEDOUT);
1256 else
1257 resp = ERR_PTR(-EIO);
1258 }
1259
1260 exit:
1261 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1262
1263 kfree(cb_arg);
1264 }
1265
1266 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1267 struct sk_buff *skb, u16 timeout,
1268 nfc_digital_cmd_complete_t cb, void *arg)
1269 {
1270 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1271 struct port100_tg_comm_rf_cmd *hdr;
1272 struct port100_cb_arg *cb_arg;
1273
1274 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1275 if (!cb_arg)
1276 return -ENOMEM;
1277
1278 cb_arg->complete_cb = cb;
1279 cb_arg->complete_arg = arg;
1280
1281 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1282
1283 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1284
1285 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1286 hdr->guard_time = cpu_to_le16(500);
1287 hdr->send_timeout = cpu_to_le16(0xFFFF);
1288 hdr->recv_timeout = cpu_to_le16(timeout);
1289
1290 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1291 port100_tg_comm_rf_complete, cb_arg);
1292 }
1293
1294 static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1295 struct digital_tg_mdaa_params *params,
1296 u16 timeout,
1297 nfc_digital_cmd_complete_t cb, void *arg)
1298 {
1299 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1300 struct port100_tg_comm_rf_cmd *hdr;
1301 struct port100_cb_arg *cb_arg;
1302 struct sk_buff *skb;
1303 int rc;
1304
1305 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1306 NFC_DIGITAL_RF_TECH_106A);
1307 if (rc)
1308 return rc;
1309
1310 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1311 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1312 if (rc)
1313 return rc;
1314
1315 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1316 if (!cb_arg)
1317 return -ENOMEM;
1318
1319 cb_arg->complete_cb = cb;
1320 cb_arg->complete_arg = arg;
1321 cb_arg->mdaa = 1;
1322
1323 skb = port100_alloc_skb(dev, 0);
1324 if (!skb) {
1325 kfree(cb_arg);
1326 return -ENOMEM;
1327 }
1328
1329 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1330 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1331
1332 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1333
1334 hdr->guard_time = 0;
1335 hdr->send_timeout = cpu_to_le16(0xFFFF);
1336 hdr->mdaa = 1;
1337 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
1338 hdr->nfca_param[1] = params->sens_res & 0xFF;
1339 memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
1340 hdr->nfca_param[5] = params->sel_res;
1341 memcpy(hdr->nfcf_param, params->nfcid2, 8);
1342 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
1343 hdr->nfcf_param[17] = params->sc & 0xFF;
1344 hdr->recv_timeout = cpu_to_le16(timeout);
1345
1346 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1347 port100_tg_comm_rf_complete, cb_arg);
1348 }
1349
1350 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1351 nfc_digital_cmd_complete_t cb, void *arg)
1352 {
1353 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1354 struct sk_buff *skb;
1355
1356 skb = port100_alloc_skb(dev, 0);
1357 if (!skb)
1358 return -ENOMEM;
1359
1360 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
1361 }
1362
1363 static struct nfc_digital_ops port100_digital_ops = {
1364 .in_configure_hw = port100_in_configure_hw,
1365 .in_send_cmd = port100_in_send_cmd,
1366
1367 .tg_listen_mdaa = port100_listen_mdaa,
1368 .tg_listen = port100_listen,
1369 .tg_configure_hw = port100_tg_configure_hw,
1370 .tg_send_cmd = port100_tg_send_cmd,
1371
1372 .switch_rf = port100_switch_rf,
1373 .abort_cmd = port100_abort_cmd,
1374 };
1375
1376 static const struct usb_device_id port100_table[] = {
1377 { USB_DEVICE(SONY_VENDOR_ID, RCS380_PRODUCT_ID), },
1378 { }
1379 };
1380 MODULE_DEVICE_TABLE(usb, port100_table);
1381
1382 static int port100_probe(struct usb_interface *interface,
1383 const struct usb_device_id *id)
1384 {
1385 struct port100 *dev;
1386 int rc;
1387 struct usb_host_interface *iface_desc;
1388 struct usb_endpoint_descriptor *endpoint;
1389 int in_endpoint;
1390 int out_endpoint;
1391 u16 fw_version;
1392 u64 cmd_type_mask;
1393 int i;
1394
1395 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1396 if (!dev)
1397 return -ENOMEM;
1398
1399 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1400 dev->interface = interface;
1401 usb_set_intfdata(interface, dev);
1402
1403 in_endpoint = out_endpoint = 0;
1404 iface_desc = interface->cur_altsetting;
1405 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1406 endpoint = &iface_desc->endpoint[i].desc;
1407
1408 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1409 in_endpoint = endpoint->bEndpointAddress;
1410
1411 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1412 out_endpoint = endpoint->bEndpointAddress;
1413 }
1414
1415 if (!in_endpoint || !out_endpoint) {
1416 nfc_err(&interface->dev,
1417 "Could not find bulk-in or bulk-out endpoint\n");
1418 rc = -ENODEV;
1419 goto error;
1420 }
1421
1422 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1423 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1424
1425 if (!dev->in_urb || !dev->out_urb) {
1426 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1427 rc = -ENOMEM;
1428 goto error;
1429 }
1430
1431 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1432 usb_rcvbulkpipe(dev->udev, in_endpoint),
1433 NULL, 0, NULL, dev);
1434 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1435 usb_sndbulkpipe(dev->udev, out_endpoint),
1436 NULL, 0, port100_send_complete, dev);
1437
1438 dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1439 PORT100_COMM_RF_HEAD_MAX_LEN;
1440 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1441
1442 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1443
1444 /* The first thing to do with the Port-100 is to set the command type
1445 * to be used. If supported we use command type 1. 0 otherwise.
1446 */
1447 cmd_type_mask = port100_get_command_type_mask(dev);
1448 if (!cmd_type_mask) {
1449 nfc_err(&interface->dev,
1450 "Could not get supported command types.\n");
1451 rc = -ENODEV;
1452 goto error;
1453 }
1454
1455 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1456 dev->cmd_type = PORT100_CMD_TYPE_1;
1457 else
1458 dev->cmd_type = PORT100_CMD_TYPE_0;
1459
1460 rc = port100_set_command_type(dev, dev->cmd_type);
1461 if (rc) {
1462 nfc_err(&interface->dev,
1463 "The device does not support command type %u.\n",
1464 dev->cmd_type);
1465 goto error;
1466 }
1467
1468 fw_version = port100_get_firmware_version(dev);
1469 if (!fw_version)
1470 nfc_err(&interface->dev,
1471 "Could not get device firmware version.\n");
1472
1473 nfc_info(&interface->dev,
1474 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1475 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1476
1477 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1478 PORT100_PROTOCOLS,
1479 PORT100_CAPABILITIES,
1480 dev->skb_headroom,
1481 dev->skb_tailroom);
1482 if (!dev->nfc_digital_dev) {
1483 nfc_err(&interface->dev,
1484 "Could not allocate nfc_digital_dev.\n");
1485 rc = -ENOMEM;
1486 goto error;
1487 }
1488
1489 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1490 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1491
1492 rc = nfc_digital_register_device(dev->nfc_digital_dev);
1493 if (rc) {
1494 nfc_err(&interface->dev,
1495 "Could not register digital device.\n");
1496 goto free_nfc_dev;
1497 }
1498
1499 return 0;
1500
1501 free_nfc_dev:
1502 nfc_digital_free_device(dev->nfc_digital_dev);
1503
1504 error:
1505 usb_free_urb(dev->in_urb);
1506 usb_free_urb(dev->out_urb);
1507 usb_put_dev(dev->udev);
1508
1509 return rc;
1510 }
1511
1512 static void port100_disconnect(struct usb_interface *interface)
1513 {
1514 struct port100 *dev;
1515
1516 dev = usb_get_intfdata(interface);
1517 usb_set_intfdata(interface, NULL);
1518
1519 nfc_digital_unregister_device(dev->nfc_digital_dev);
1520 nfc_digital_free_device(dev->nfc_digital_dev);
1521
1522 usb_kill_urb(dev->in_urb);
1523 usb_kill_urb(dev->out_urb);
1524
1525 usb_free_urb(dev->in_urb);
1526 usb_free_urb(dev->out_urb);
1527 usb_put_dev(dev->udev);
1528
1529 kfree(dev->cmd);
1530
1531 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected");
1532 }
1533
1534 static struct usb_driver port100_driver = {
1535 .name = "port100",
1536 .probe = port100_probe,
1537 .disconnect = port100_disconnect,
1538 .id_table = port100_table,
1539 };
1540
1541 module_usb_driver(port100_driver);
1542
1543 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1544 MODULE_VERSION(VERSION);
1545 MODULE_LICENSE("GPL");
Linux with added FPC-III support