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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Sony NFC Port-100 Series driver
4 * Copyright (c) 2013, Intel Corporation.
5 *
6 * Partly based/Inspired by Stephen Tiedemann's nfcpy
7 */
8
9#include <linux/module.h>
10#include <linux/usb.h>
11#include <net/nfc/digital.h>
12
13#define VERSION "0.1"
14
15#define SONY_VENDOR_ID 0x054c
16#define RCS380S_PRODUCT_ID 0x06c1
17#define RCS380P_PRODUCT_ID 0x06c3
18
19#define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
20 NFC_PROTO_MIFARE_MASK | \
21 NFC_PROTO_FELICA_MASK | \
22 NFC_PROTO_NFC_DEP_MASK | \
23 NFC_PROTO_ISO14443_MASK | \
24 NFC_PROTO_ISO14443_B_MASK)
25
26#define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
27 NFC_DIGITAL_DRV_CAPS_TG_CRC)
28
29/* Standard port100 frame definitions */
30#define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \
31 + 2) /* data[0] CC, data[1] SCC */
32#define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
33
34#define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd))
35
36/*
37 * Max extended frame payload len, excluding CC and SCC
38 * which are already in PORT100_FRAME_HEADER_LEN.
39 */
40#define PORT100_FRAME_MAX_PAYLOAD_LEN 1001
41
42#define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
43 Postamble (1) */
44static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
45 0x00, 0x00, 0xff, 0x00, 0xff, 0x00
46};
47
48#define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)])
49#define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1])
50
51/* start of frame */
52#define PORT100_FRAME_SOF 0x00FF
53#define PORT100_FRAME_EXT 0xFFFF
54#define PORT100_FRAME_ACK 0x00FF
55
56/* Port-100 command: in or out */
57#define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */
58#define PORT100_FRAME_DIR_OUT 0xD6
59#define PORT100_FRAME_DIR_IN 0xD7
60
61/* Port-100 sub-command */
62#define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */
63
64#define PORT100_CMD_GET_FIRMWARE_VERSION 0x20
65#define PORT100_CMD_GET_COMMAND_TYPE 0x28
66#define PORT100_CMD_SET_COMMAND_TYPE 0x2A
67
68#define PORT100_CMD_IN_SET_RF 0x00
69#define PORT100_CMD_IN_SET_PROTOCOL 0x02
70#define PORT100_CMD_IN_COMM_RF 0x04
71
72#define PORT100_CMD_TG_SET_RF 0x40
73#define PORT100_CMD_TG_SET_PROTOCOL 0x42
74#define PORT100_CMD_TG_SET_RF_OFF 0x46
75#define PORT100_CMD_TG_COMM_RF 0x48
76
77#define PORT100_CMD_SWITCH_RF 0x06
78
79#define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
80
81#define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
82 ((mask) & (0x01 << (cmd_type)))
83#define PORT100_CMD_TYPE_0 0
84#define PORT100_CMD_TYPE_1 1
85
86#define PORT100_CMD_STATUS_OK 0x00
87#define PORT100_CMD_STATUS_TIMEOUT 0x80
88
89#define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
90#define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02
91
92struct port100;
93
94typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
95 struct sk_buff *resp);
96
97/*
98 * Setting sets structure for in_set_rf command
99 *
100 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
101 * This table contains multiple RF setting sets required for RF
102 * communication.
103 *
104 * @in_*_comm_type: Theses fields set the communication type to be used.
105 */
106struct port100_in_rf_setting {
107 u8 in_send_set_number;
108 u8 in_send_comm_type;
109 u8 in_recv_set_number;
110 u8 in_recv_comm_type;
111} __packed;
112
113#define PORT100_COMM_TYPE_IN_212F 0x01
114#define PORT100_COMM_TYPE_IN_424F 0x02
115#define PORT100_COMM_TYPE_IN_106A 0x03
116#define PORT100_COMM_TYPE_IN_106B 0x07
117
118static const struct port100_in_rf_setting in_rf_settings[] = {
119 [NFC_DIGITAL_RF_TECH_212F] = {
120 .in_send_set_number = 1,
121 .in_send_comm_type = PORT100_COMM_TYPE_IN_212F,
122 .in_recv_set_number = 15,
123 .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F,
124 },
125 [NFC_DIGITAL_RF_TECH_424F] = {
126 .in_send_set_number = 1,
127 .in_send_comm_type = PORT100_COMM_TYPE_IN_424F,
128 .in_recv_set_number = 15,
129 .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F,
130 },
131 [NFC_DIGITAL_RF_TECH_106A] = {
132 .in_send_set_number = 2,
133 .in_send_comm_type = PORT100_COMM_TYPE_IN_106A,
134 .in_recv_set_number = 15,
135 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A,
136 },
137 [NFC_DIGITAL_RF_TECH_106B] = {
138 .in_send_set_number = 3,
139 .in_send_comm_type = PORT100_COMM_TYPE_IN_106B,
140 .in_recv_set_number = 15,
141 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106B,
142 },
143 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
144 [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
145};
146
147/**
148 * struct port100_tg_rf_setting - 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 */
158struct 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
167static 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
215struct port100_protocol {
216 u8 number;
217 u8 value;
218} __packed;
219
220static const struct port100_protocol
221in_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_INITIAL_GUARD_TIME, 18 },
339 { PORT100_IN_PROT_ADD_CRC, 1 },
340 { PORT100_IN_PROT_CHECK_CRC, 1 },
341 { PORT100_IN_PROT_MULTI_CARD, 0 },
342 { PORT100_IN_PROT_ADD_PARITY, 0 },
343 { PORT100_IN_PROT_CHECK_PARITY, 0 },
344 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
345 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
346 { PORT100_IN_PROT_CRYPTO1, 0 },
347 { PORT100_IN_PROT_ADD_SOF, 0 },
348 { PORT100_IN_PROT_CHECK_SOF, 0 },
349 { PORT100_IN_PROT_ADD_EOF, 0 },
350 { PORT100_IN_PROT_CHECK_EOF, 0 },
351 { PORT100_IN_PROT_DEAF_TIME, 4 },
352 { PORT100_IN_PROT_CRM, 0 },
353 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
354 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
355 { PORT100_IN_PROT_RFCA, 0 },
356 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
357 { PORT100_IN_PROT_END, 0 },
358 },
359 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
360 { PORT100_IN_PROT_END, 0 },
361 },
362 [NFC_DIGITAL_FRAMING_NFCB] = {
363 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 20 },
364 { PORT100_IN_PROT_ADD_CRC, 1 },
365 { PORT100_IN_PROT_CHECK_CRC, 1 },
366 { PORT100_IN_PROT_MULTI_CARD, 0 },
367 { PORT100_IN_PROT_ADD_PARITY, 0 },
368 { PORT100_IN_PROT_CHECK_PARITY, 0 },
369 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
370 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
371 { PORT100_IN_PROT_CRYPTO1, 0 },
372 { PORT100_IN_PROT_ADD_SOF, 1 },
373 { PORT100_IN_PROT_CHECK_SOF, 1 },
374 { PORT100_IN_PROT_ADD_EOF, 1 },
375 { PORT100_IN_PROT_CHECK_EOF, 1 },
376 { PORT100_IN_PROT_DEAF_TIME, 4 },
377 { PORT100_IN_PROT_CRM, 0 },
378 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
379 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
380 { PORT100_IN_PROT_RFCA, 0 },
381 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
382 { PORT100_IN_PROT_END, 0 },
383 },
384 [NFC_DIGITAL_FRAMING_NFCB_T4T] = {
385 /* nfc_digital_framing_nfcb */
386 { PORT100_IN_PROT_END, 0 },
387 },
388 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
389 [NFC_DIGITAL_FRAMING_LAST] = {
390 { PORT100_IN_PROT_END, 0 },
391 },
392};
393
394static const struct port100_protocol
395tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
396 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
397 { PORT100_TG_PROT_END, 0 },
398 },
399 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
400 { PORT100_TG_PROT_END, 0 },
401 },
402 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
403 { PORT100_TG_PROT_END, 0 },
404 },
405 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
406 { PORT100_TG_PROT_END, 0 },
407 },
408 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
409 { PORT100_TG_PROT_END, 0 },
410 },
411 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
412 { PORT100_TG_PROT_TU, 1 },
413 { PORT100_TG_PROT_RF_OFF, 0 },
414 { PORT100_TG_PROT_CRM, 7 },
415 { PORT100_TG_PROT_END, 0 },
416 },
417 [NFC_DIGITAL_FRAMING_NFCF] = {
418 { PORT100_TG_PROT_END, 0 },
419 },
420 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
421 { PORT100_TG_PROT_END, 0 },
422 },
423 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
424 { PORT100_TG_PROT_TU, 1 },
425 { PORT100_TG_PROT_RF_OFF, 0 },
426 { PORT100_TG_PROT_CRM, 7 },
427 { PORT100_TG_PROT_END, 0 },
428 },
429 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
430 { PORT100_TG_PROT_RF_OFF, 1 },
431 { PORT100_TG_PROT_END, 0 },
432 },
433 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
434 [NFC_DIGITAL_FRAMING_LAST] = {
435 { PORT100_TG_PROT_END, 0 },
436 },
437};
438
439struct port100 {
440 struct nfc_digital_dev *nfc_digital_dev;
441
442 int skb_headroom;
443 int skb_tailroom;
444
445 struct usb_device *udev;
446 struct usb_interface *interface;
447
448 struct urb *out_urb;
449 struct urb *in_urb;
450
451 /* This mutex protects the out_urb and avoids to submit a new command
452 * through port100_send_frame_async() while the previous one is being
453 * canceled through port100_abort_cmd().
454 */
455 struct mutex out_urb_lock;
456
457 struct work_struct cmd_complete_work;
458
459 u8 cmd_type;
460
461 /* The digital stack serializes commands to be sent. There is no need
462 * for any queuing/locking mechanism at driver level.
463 */
464 struct port100_cmd *cmd;
465
466 bool cmd_cancel;
467 struct completion cmd_cancel_done;
468};
469
470struct port100_cmd {
471 u8 code;
472 int status;
473 struct sk_buff *req;
474 struct sk_buff *resp;
475 int resp_len;
476 port100_send_async_complete_t complete_cb;
477 void *complete_cb_context;
478};
479
480struct port100_frame {
481 u8 preamble;
482 __be16 start_frame;
483 __be16 extended_frame;
484 __le16 datalen;
485 u8 datalen_checksum;
486 u8 data[];
487} __packed;
488
489struct port100_ack_frame {
490 u8 preamble;
491 __be16 start_frame;
492 __be16 ack_frame;
493 u8 postambule;
494} __packed;
495
496struct port100_cb_arg {
497 nfc_digital_cmd_complete_t complete_cb;
498 void *complete_arg;
499 u8 mdaa;
500};
501
502struct port100_tg_comm_rf_cmd {
503 __le16 guard_time;
504 __le16 send_timeout;
505 u8 mdaa;
506 u8 nfca_param[6];
507 u8 nfcf_param[18];
508 u8 mf_halted;
509 u8 arae_flag;
510 __le16 recv_timeout;
511 u8 data[];
512} __packed;
513
514struct port100_tg_comm_rf_res {
515 u8 comm_type;
516 u8 ar_status;
517 u8 target_activated;
518 __le32 status;
519 u8 data[];
520} __packed;
521
522/* The rule: value + checksum = 0 */
523static inline u8 port100_checksum(u16 value)
524{
525 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
526}
527
528/* The rule: sum(data elements) + checksum = 0 */
529static u8 port100_data_checksum(const u8 *data, int datalen)
530{
531 u8 sum = 0;
532 int i;
533
534 for (i = 0; i < datalen; i++)
535 sum += data[i];
536
537 return port100_checksum(sum);
538}
539
540static void port100_tx_frame_init(void *_frame, u8 cmd_code)
541{
542 struct port100_frame *frame = _frame;
543
544 frame->preamble = 0;
545 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
546 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
547 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
548 PORT100_FRAME_CMD(frame) = cmd_code;
549 frame->datalen = cpu_to_le16(2);
550}
551
552static void port100_tx_frame_finish(void *_frame)
553{
554 struct port100_frame *frame = _frame;
555
556 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
557
558 PORT100_FRAME_CHECKSUM(frame) =
559 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
560
561 PORT100_FRAME_POSTAMBLE(frame) = 0;
562}
563
564static void port100_tx_update_payload_len(void *_frame, int len)
565{
566 struct port100_frame *frame = _frame;
567
568 le16_add_cpu(&frame->datalen, len);
569}
570
571static bool port100_rx_frame_is_valid(const void *_frame)
572{
573 u8 checksum;
574 const struct port100_frame *frame = _frame;
575
576 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
577 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
578 return false;
579
580 checksum = port100_checksum(le16_to_cpu(frame->datalen));
581 if (checksum != frame->datalen_checksum)
582 return false;
583
584 checksum = port100_data_checksum(frame->data,
585 le16_to_cpu(frame->datalen));
586 if (checksum != PORT100_FRAME_CHECKSUM(frame))
587 return false;
588
589 return true;
590}
591
592static bool port100_rx_frame_is_ack(const struct port100_ack_frame *frame)
593{
594 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
595 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
596}
597
598static inline int port100_rx_frame_size(const void *frame)
599{
600 const struct port100_frame *f = frame;
601
602 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
603 PORT100_FRAME_TAIL_LEN;
604}
605
606static bool port100_rx_frame_is_cmd_response(const struct port100 *dev,
607 const void *frame)
608{
609 const struct port100_frame *f = frame;
610
611 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
612}
613
614static void port100_recv_response(struct urb *urb)
615{
616 struct port100 *dev = urb->context;
617 struct port100_cmd *cmd = dev->cmd;
618 u8 *in_frame;
619
620 cmd->status = urb->status;
621
622 switch (urb->status) {
623 case 0:
624 break; /* success */
625 case -ECONNRESET:
626 case -ENOENT:
627 nfc_dbg(&dev->interface->dev,
628 "The urb has been canceled (status %d)\n", urb->status);
629 goto sched_wq;
630 case -ESHUTDOWN:
631 default:
632 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
633 urb->status);
634 goto sched_wq;
635 }
636
637 in_frame = dev->in_urb->transfer_buffer;
638
639 if (!port100_rx_frame_is_valid(in_frame)) {
640 nfc_err(&dev->interface->dev, "Received an invalid frame\n");
641 cmd->status = -EIO;
642 goto sched_wq;
643 }
644
645 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
646 port100_rx_frame_size(in_frame), false);
647
648 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
649 nfc_err(&dev->interface->dev,
650 "It's not the response to the last command\n");
651 cmd->status = -EIO;
652 goto sched_wq;
653 }
654
655sched_wq:
656 schedule_work(&dev->cmd_complete_work);
657}
658
659static int port100_submit_urb_for_response(const struct port100 *dev,
660 gfp_t flags)
661{
662 dev->in_urb->complete = port100_recv_response;
663
664 return usb_submit_urb(dev->in_urb, flags);
665}
666
667static void port100_recv_ack(struct urb *urb)
668{
669 struct port100 *dev = urb->context;
670 struct port100_cmd *cmd = dev->cmd;
671 const struct port100_ack_frame *in_frame;
672 int rc;
673
674 cmd->status = urb->status;
675
676 switch (urb->status) {
677 case 0:
678 break; /* success */
679 case -ECONNRESET:
680 case -ENOENT:
681 nfc_dbg(&dev->interface->dev,
682 "The urb has been stopped (status %d)\n", urb->status);
683 goto sched_wq;
684 case -ESHUTDOWN:
685 default:
686 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
687 urb->status);
688 goto sched_wq;
689 }
690
691 in_frame = dev->in_urb->transfer_buffer;
692
693 if (!port100_rx_frame_is_ack(in_frame)) {
694 nfc_err(&dev->interface->dev, "Received an invalid ack\n");
695 cmd->status = -EIO;
696 goto sched_wq;
697 }
698
699 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
700 if (rc) {
701 nfc_err(&dev->interface->dev,
702 "usb_submit_urb failed with result %d\n", rc);
703 cmd->status = rc;
704 goto sched_wq;
705 }
706
707 return;
708
709sched_wq:
710 schedule_work(&dev->cmd_complete_work);
711}
712
713static int port100_submit_urb_for_ack(const struct port100 *dev, gfp_t flags)
714{
715 dev->in_urb->complete = port100_recv_ack;
716
717 return usb_submit_urb(dev->in_urb, flags);
718}
719
720static int port100_send_ack(struct port100 *dev)
721{
722 int rc = 0;
723
724 mutex_lock(&dev->out_urb_lock);
725
726 /*
727 * If prior cancel is in-flight (dev->cmd_cancel == true), we
728 * can skip to send cancel. Then this will wait the prior
729 * cancel, or merged into the next cancel rarely if next
730 * cancel was started before waiting done. In any case, this
731 * will be waked up soon or later.
732 */
733 if (!dev->cmd_cancel) {
734 reinit_completion(&dev->cmd_cancel_done);
735
736 usb_kill_urb(dev->out_urb);
737
738 dev->out_urb->transfer_buffer = ack_frame;
739 dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
740 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
741
742 /*
743 * Set the cmd_cancel flag only if the URB has been
744 * successfully submitted. It will be reset by the out
745 * URB completion callback port100_send_complete().
746 */
747 dev->cmd_cancel = !rc;
748 }
749
750 mutex_unlock(&dev->out_urb_lock);
751
752 if (!rc)
753 wait_for_completion(&dev->cmd_cancel_done);
754
755 return rc;
756}
757
758static int port100_send_frame_async(struct port100 *dev,
759 const struct sk_buff *out,
760 const struct sk_buff *in, int in_len)
761{
762 int rc;
763
764 mutex_lock(&dev->out_urb_lock);
765
766 /* A command cancel frame as been sent through dev->out_urb. Don't try
767 * to submit a new one.
768 */
769 if (dev->cmd_cancel) {
770 rc = -EAGAIN;
771 goto exit;
772 }
773
774 dev->out_urb->transfer_buffer = out->data;
775 dev->out_urb->transfer_buffer_length = out->len;
776
777 dev->in_urb->transfer_buffer = in->data;
778 dev->in_urb->transfer_buffer_length = in_len;
779
780 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
781 out->data, out->len, false);
782
783 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
784 if (rc)
785 goto exit;
786
787 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
788 if (rc)
789 usb_kill_urb(dev->out_urb);
790
791exit:
792 mutex_unlock(&dev->out_urb_lock);
793
794 return rc;
795}
796
797static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
798 struct sk_buff *skb)
799{
800 /* payload is already there, just update datalen */
801 int payload_len = skb->len;
802
803 skb_push(skb, PORT100_FRAME_HEADER_LEN);
804 skb_put(skb, PORT100_FRAME_TAIL_LEN);
805
806 port100_tx_frame_init(skb->data, cmd_code);
807 port100_tx_update_payload_len(skb->data, payload_len);
808 port100_tx_frame_finish(skb->data);
809}
810
811static void port100_send_async_complete(struct port100 *dev)
812{
813 struct port100_cmd *cmd = dev->cmd;
814 int status = cmd->status;
815
816 struct sk_buff *req = cmd->req;
817 struct sk_buff *resp = cmd->resp;
818
819 dev_kfree_skb(req);
820
821 dev->cmd = NULL;
822
823 if (status < 0) {
824 cmd->complete_cb(dev, cmd->complete_cb_context,
825 ERR_PTR(status));
826 dev_kfree_skb(resp);
827 goto done;
828 }
829
830 skb_put(resp, port100_rx_frame_size(resp->data));
831 skb_pull(resp, PORT100_FRAME_HEADER_LEN);
832 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
833
834 cmd->complete_cb(dev, cmd->complete_cb_context, resp);
835
836done:
837 kfree(cmd);
838}
839
840static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
841 struct sk_buff *req,
842 port100_send_async_complete_t complete_cb,
843 void *complete_cb_context)
844{
845 struct port100_cmd *cmd;
846 struct sk_buff *resp;
847 int rc;
848 int resp_len = PORT100_FRAME_HEADER_LEN +
849 PORT100_FRAME_MAX_PAYLOAD_LEN +
850 PORT100_FRAME_TAIL_LEN;
851
852 if (dev->cmd) {
853 nfc_err(&dev->interface->dev,
854 "A command is still in process\n");
855 return -EBUSY;
856 }
857
858 resp = alloc_skb(resp_len, GFP_KERNEL);
859 if (!resp)
860 return -ENOMEM;
861
862 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
863 if (!cmd) {
864 dev_kfree_skb(resp);
865 return -ENOMEM;
866 }
867
868 cmd->code = cmd_code;
869 cmd->req = req;
870 cmd->resp = resp;
871 cmd->resp_len = resp_len;
872 cmd->complete_cb = complete_cb;
873 cmd->complete_cb_context = complete_cb_context;
874
875 port100_build_cmd_frame(dev, cmd_code, req);
876
877 dev->cmd = cmd;
878
879 rc = port100_send_frame_async(dev, req, resp, resp_len);
880 if (rc) {
881 kfree(cmd);
882 dev_kfree_skb(resp);
883 dev->cmd = NULL;
884 }
885
886 return rc;
887}
888
889struct port100_sync_cmd_response {
890 struct sk_buff *resp;
891 struct completion done;
892};
893
894static void port100_wq_cmd_complete(struct work_struct *work)
895{
896 struct port100 *dev = container_of(work, struct port100,
897 cmd_complete_work);
898
899 port100_send_async_complete(dev);
900}
901
902static void port100_send_sync_complete(struct port100 *dev, void *_arg,
903 struct sk_buff *resp)
904{
905 struct port100_sync_cmd_response *arg = _arg;
906
907 arg->resp = resp;
908 complete(&arg->done);
909}
910
911static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
912 struct sk_buff *req)
913{
914 int rc;
915 struct port100_sync_cmd_response arg;
916
917 init_completion(&arg.done);
918
919 rc = port100_send_cmd_async(dev, cmd_code, req,
920 port100_send_sync_complete, &arg);
921 if (rc) {
922 dev_kfree_skb(req);
923 return ERR_PTR(rc);
924 }
925
926 wait_for_completion(&arg.done);
927
928 return arg.resp;
929}
930
931static void port100_send_complete(struct urb *urb)
932{
933 struct port100 *dev = urb->context;
934
935 if (dev->cmd_cancel) {
936 complete_all(&dev->cmd_cancel_done);
937 dev->cmd_cancel = false;
938 }
939
940 switch (urb->status) {
941 case 0:
942 break; /* success */
943 case -ECONNRESET:
944 case -ENOENT:
945 nfc_dbg(&dev->interface->dev,
946 "The urb has been stopped (status %d)\n", urb->status);
947 break;
948 case -ESHUTDOWN:
949 default:
950 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
951 urb->status);
952 }
953}
954
955static void port100_abort_cmd(struct nfc_digital_dev *ddev)
956{
957 struct port100 *dev = nfc_digital_get_drvdata(ddev);
958
959 /* An ack will cancel the last issued command */
960 port100_send_ack(dev);
961
962 /* cancel the urb request */
963 usb_kill_urb(dev->in_urb);
964}
965
966static struct sk_buff *port100_alloc_skb(const struct port100 *dev, unsigned int size)
967{
968 struct sk_buff *skb;
969
970 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
971 GFP_KERNEL);
972 if (skb)
973 skb_reserve(skb, dev->skb_headroom);
974
975 return skb;
976}
977
978static int port100_set_command_type(struct port100 *dev, u8 command_type)
979{
980 struct sk_buff *skb;
981 struct sk_buff *resp;
982 int rc;
983
984 skb = port100_alloc_skb(dev, 1);
985 if (!skb)
986 return -ENOMEM;
987
988 skb_put_u8(skb, command_type);
989
990 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
991 if (IS_ERR(resp))
992 return PTR_ERR(resp);
993
994 rc = resp->data[0];
995
996 dev_kfree_skb(resp);
997
998 return rc;
999}
1000
1001static u64 port100_get_command_type_mask(struct port100 *dev)
1002{
1003 struct sk_buff *skb;
1004 struct sk_buff *resp;
1005 u64 mask;
1006
1007 skb = port100_alloc_skb(dev, 0);
1008 if (!skb)
1009 return 0;
1010
1011 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
1012 if (IS_ERR(resp))
1013 return 0;
1014
1015 if (resp->len < 8)
1016 mask = 0;
1017 else
1018 mask = be64_to_cpu(*(__be64 *)resp->data);
1019
1020 dev_kfree_skb(resp);
1021
1022 return mask;
1023}
1024
1025static u16 port100_get_firmware_version(struct port100 *dev)
1026{
1027 struct sk_buff *skb;
1028 struct sk_buff *resp;
1029 u16 fw_ver;
1030
1031 skb = port100_alloc_skb(dev, 0);
1032 if (!skb)
1033 return 0;
1034
1035 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
1036 skb);
1037 if (IS_ERR(resp))
1038 return 0;
1039
1040 fw_ver = le16_to_cpu(*(__le16 *)resp->data);
1041
1042 dev_kfree_skb(resp);
1043
1044 return fw_ver;
1045}
1046
1047static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
1048{
1049 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1050 struct sk_buff *skb, *resp;
1051
1052 skb = port100_alloc_skb(dev, 1);
1053 if (!skb)
1054 return -ENOMEM;
1055
1056 skb_put_u8(skb, on ? 1 : 0);
1057
1058 /* Cancel the last command if the device is being switched off */
1059 if (!on)
1060 port100_abort_cmd(ddev);
1061
1062 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
1063
1064 if (IS_ERR(resp))
1065 return PTR_ERR(resp);
1066
1067 dev_kfree_skb(resp);
1068
1069 return 0;
1070}
1071
1072static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1073{
1074 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1075 struct sk_buff *skb;
1076 struct sk_buff *resp;
1077 int rc;
1078
1079 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1080 return -EINVAL;
1081
1082 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
1083 if (!skb)
1084 return -ENOMEM;
1085
1086 skb_put_data(skb, &in_rf_settings[rf],
1087 sizeof(struct port100_in_rf_setting));
1088
1089 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
1090
1091 if (IS_ERR(resp))
1092 return PTR_ERR(resp);
1093
1094 rc = resp->data[0];
1095
1096 dev_kfree_skb(resp);
1097
1098 return rc;
1099}
1100
1101static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
1102{
1103 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1104 const struct port100_protocol *protocols;
1105 struct sk_buff *skb;
1106 struct sk_buff *resp;
1107 int num_protocols;
1108 size_t size;
1109 int rc;
1110
1111 if (param >= NFC_DIGITAL_FRAMING_LAST)
1112 return -EINVAL;
1113
1114 protocols = in_protocols[param];
1115
1116 num_protocols = 0;
1117 while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1118 num_protocols++;
1119
1120 if (!num_protocols)
1121 return 0;
1122
1123 size = sizeof(struct port100_protocol) * num_protocols;
1124
1125 skb = port100_alloc_skb(dev, size);
1126 if (!skb)
1127 return -ENOMEM;
1128
1129 skb_put_data(skb, protocols, size);
1130
1131 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1132
1133 if (IS_ERR(resp))
1134 return PTR_ERR(resp);
1135
1136 rc = resp->data[0];
1137
1138 dev_kfree_skb(resp);
1139
1140 return rc;
1141}
1142
1143static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1144 int param)
1145{
1146 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1147 return port100_in_set_rf(ddev, param);
1148
1149 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1150 return port100_in_set_framing(ddev, param);
1151
1152 return -EINVAL;
1153}
1154
1155static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1156 struct sk_buff *resp)
1157{
1158 const struct port100_cb_arg *cb_arg = arg;
1159 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1160 u32 status;
1161 int rc;
1162
1163 if (IS_ERR(resp)) {
1164 rc = PTR_ERR(resp);
1165 goto exit;
1166 }
1167
1168 if (resp->len < 4) {
1169 nfc_err(&dev->interface->dev,
1170 "Invalid packet length received\n");
1171 rc = -EIO;
1172 goto error;
1173 }
1174
1175 status = le32_to_cpu(*(__le32 *)resp->data);
1176
1177 skb_pull(resp, sizeof(u32));
1178
1179 if (status == PORT100_CMD_STATUS_TIMEOUT) {
1180 rc = -ETIMEDOUT;
1181 goto error;
1182 }
1183
1184 if (status != PORT100_CMD_STATUS_OK) {
1185 nfc_err(&dev->interface->dev,
1186 "in_comm_rf failed with status 0x%08x\n", status);
1187 rc = -EIO;
1188 goto error;
1189 }
1190
1191 /* Remove collision bits byte */
1192 skb_pull(resp, 1);
1193
1194 goto exit;
1195
1196error:
1197 kfree_skb(resp);
1198 resp = ERR_PTR(rc);
1199
1200exit:
1201 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1202
1203 kfree(cb_arg);
1204}
1205
1206static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1207 struct sk_buff *skb, u16 _timeout,
1208 nfc_digital_cmd_complete_t cb, void *arg)
1209{
1210 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1211 struct port100_cb_arg *cb_arg;
1212 __le16 timeout;
1213
1214 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1215 if (!cb_arg)
1216 return -ENOMEM;
1217
1218 cb_arg->complete_cb = cb;
1219 cb_arg->complete_arg = arg;
1220
1221 timeout = cpu_to_le16(_timeout * 10);
1222
1223 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1224
1225 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1226 port100_in_comm_rf_complete, cb_arg);
1227}
1228
1229static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1230{
1231 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1232 struct sk_buff *skb;
1233 struct sk_buff *resp;
1234 int rc;
1235
1236 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1237 return -EINVAL;
1238
1239 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1240 if (!skb)
1241 return -ENOMEM;
1242
1243 skb_put_data(skb, &tg_rf_settings[rf],
1244 sizeof(struct port100_tg_rf_setting));
1245
1246 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
1247
1248 if (IS_ERR(resp))
1249 return PTR_ERR(resp);
1250
1251 rc = resp->data[0];
1252
1253 dev_kfree_skb(resp);
1254
1255 return rc;
1256}
1257
1258static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
1259{
1260 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1261 const struct port100_protocol *protocols;
1262 struct sk_buff *skb;
1263 struct sk_buff *resp;
1264 int rc;
1265 int num_protocols;
1266 size_t size;
1267
1268 if (param >= NFC_DIGITAL_FRAMING_LAST)
1269 return -EINVAL;
1270
1271 protocols = tg_protocols[param];
1272
1273 num_protocols = 0;
1274 while (protocols[num_protocols].number != PORT100_TG_PROT_END)
1275 num_protocols++;
1276
1277 if (!num_protocols)
1278 return 0;
1279
1280 size = sizeof(struct port100_protocol) * num_protocols;
1281
1282 skb = port100_alloc_skb(dev, size);
1283 if (!skb)
1284 return -ENOMEM;
1285
1286 skb_put_data(skb, protocols, size);
1287
1288 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
1289
1290 if (IS_ERR(resp))
1291 return PTR_ERR(resp);
1292
1293 rc = resp->data[0];
1294
1295 dev_kfree_skb(resp);
1296
1297 return rc;
1298}
1299
1300static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1301 int param)
1302{
1303 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1304 return port100_tg_set_rf(ddev, param);
1305
1306 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1307 return port100_tg_set_framing(ddev, param);
1308
1309 return -EINVAL;
1310}
1311
1312static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
1313{
1314 u8 mask;
1315
1316 switch (dev->cmd_type) {
1317 case PORT100_CMD_TYPE_0:
1318 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
1319 break;
1320 case PORT100_CMD_TYPE_1:
1321 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
1322 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
1323 break;
1324 default:
1325 nfc_err(&dev->interface->dev, "Unknown command type\n");
1326 return false;
1327 }
1328
1329 return ((tgt_activated & mask) == mask);
1330}
1331
1332static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
1333 struct sk_buff *resp)
1334{
1335 u32 status;
1336 const struct port100_cb_arg *cb_arg = arg;
1337 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1338 struct port100_tg_comm_rf_res *hdr;
1339
1340 if (IS_ERR(resp))
1341 goto exit;
1342
1343 hdr = (struct port100_tg_comm_rf_res *)resp->data;
1344
1345 status = le32_to_cpu(hdr->status);
1346
1347 if (cb_arg->mdaa &&
1348 !port100_tg_target_activated(dev, hdr->target_activated)) {
1349 kfree_skb(resp);
1350 resp = ERR_PTR(-ETIMEDOUT);
1351
1352 goto exit;
1353 }
1354
1355 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
1356
1357 if (status != PORT100_CMD_STATUS_OK) {
1358 kfree_skb(resp);
1359
1360 if (status == PORT100_CMD_STATUS_TIMEOUT)
1361 resp = ERR_PTR(-ETIMEDOUT);
1362 else
1363 resp = ERR_PTR(-EIO);
1364 }
1365
1366exit:
1367 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1368
1369 kfree(cb_arg);
1370}
1371
1372static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1373 struct sk_buff *skb, u16 timeout,
1374 nfc_digital_cmd_complete_t cb, void *arg)
1375{
1376 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1377 struct port100_tg_comm_rf_cmd *hdr;
1378 struct port100_cb_arg *cb_arg;
1379
1380 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1381 if (!cb_arg)
1382 return -ENOMEM;
1383
1384 cb_arg->complete_cb = cb;
1385 cb_arg->complete_arg = arg;
1386
1387 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1388
1389 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1390
1391 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1392 hdr->guard_time = cpu_to_le16(500);
1393 hdr->send_timeout = cpu_to_le16(0xFFFF);
1394 hdr->recv_timeout = cpu_to_le16(timeout);
1395
1396 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1397 port100_tg_comm_rf_complete, cb_arg);
1398}
1399
1400static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1401 struct digital_tg_mdaa_params *params,
1402 u16 timeout,
1403 nfc_digital_cmd_complete_t cb, void *arg)
1404{
1405 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1406 struct port100_tg_comm_rf_cmd *hdr;
1407 struct port100_cb_arg *cb_arg;
1408 struct sk_buff *skb;
1409 int rc;
1410
1411 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1412 NFC_DIGITAL_RF_TECH_106A);
1413 if (rc)
1414 return rc;
1415
1416 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1417 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1418 if (rc)
1419 return rc;
1420
1421 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1422 if (!cb_arg)
1423 return -ENOMEM;
1424
1425 cb_arg->complete_cb = cb;
1426 cb_arg->complete_arg = arg;
1427 cb_arg->mdaa = 1;
1428
1429 skb = port100_alloc_skb(dev, 0);
1430 if (!skb) {
1431 kfree(cb_arg);
1432 return -ENOMEM;
1433 }
1434
1435 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1436 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1437
1438 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1439
1440 hdr->guard_time = 0;
1441 hdr->send_timeout = cpu_to_le16(0xFFFF);
1442 hdr->mdaa = 1;
1443 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
1444 hdr->nfca_param[1] = params->sens_res & 0xFF;
1445 memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
1446 hdr->nfca_param[5] = params->sel_res;
1447 memcpy(hdr->nfcf_param, params->nfcid2, 8);
1448 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
1449 hdr->nfcf_param[17] = params->sc & 0xFF;
1450 hdr->recv_timeout = cpu_to_le16(timeout);
1451
1452 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1453 port100_tg_comm_rf_complete, cb_arg);
1454}
1455
1456static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1457 nfc_digital_cmd_complete_t cb, void *arg)
1458{
1459 const struct port100 *dev = nfc_digital_get_drvdata(ddev);
1460 struct sk_buff *skb;
1461
1462 skb = port100_alloc_skb(dev, 0);
1463 if (!skb)
1464 return -ENOMEM;
1465
1466 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
1467}
1468
1469static const struct nfc_digital_ops port100_digital_ops = {
1470 .in_configure_hw = port100_in_configure_hw,
1471 .in_send_cmd = port100_in_send_cmd,
1472
1473 .tg_listen_mdaa = port100_listen_mdaa,
1474 .tg_listen = port100_listen,
1475 .tg_configure_hw = port100_tg_configure_hw,
1476 .tg_send_cmd = port100_tg_send_cmd,
1477
1478 .switch_rf = port100_switch_rf,
1479 .abort_cmd = port100_abort_cmd,
1480};
1481
1482static const struct usb_device_id port100_table[] = {
1483 { USB_DEVICE(SONY_VENDOR_ID, RCS380S_PRODUCT_ID), },
1484 { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID), },
1485 { }
1486};
1487MODULE_DEVICE_TABLE(usb, port100_table);
1488
1489static int port100_probe(struct usb_interface *interface,
1490 const struct usb_device_id *id)
1491{
1492 struct port100 *dev;
1493 int rc;
1494 struct usb_host_interface *iface_desc;
1495 struct usb_endpoint_descriptor *endpoint;
1496 int in_endpoint;
1497 int out_endpoint;
1498 u16 fw_version;
1499 u64 cmd_type_mask;
1500 int i;
1501
1502 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1503 if (!dev)
1504 return -ENOMEM;
1505
1506 mutex_init(&dev->out_urb_lock);
1507 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1508 dev->interface = interface;
1509 usb_set_intfdata(interface, dev);
1510
1511 in_endpoint = out_endpoint = 0;
1512 iface_desc = interface->cur_altsetting;
1513 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1514 endpoint = &iface_desc->endpoint[i].desc;
1515
1516 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1517 in_endpoint = endpoint->bEndpointAddress;
1518
1519 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1520 out_endpoint = endpoint->bEndpointAddress;
1521 }
1522
1523 if (!in_endpoint || !out_endpoint) {
1524 nfc_err(&interface->dev,
1525 "Could not find bulk-in or bulk-out endpoint\n");
1526 rc = -ENODEV;
1527 goto error;
1528 }
1529
1530 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1531 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1532
1533 if (!dev->in_urb || !dev->out_urb) {
1534 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1535 rc = -ENOMEM;
1536 goto error;
1537 }
1538
1539 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1540 usb_rcvbulkpipe(dev->udev, in_endpoint),
1541 NULL, 0, NULL, dev);
1542 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1543 usb_sndbulkpipe(dev->udev, out_endpoint),
1544 NULL, 0, port100_send_complete, dev);
1545 dev->out_urb->transfer_flags = URB_ZERO_PACKET;
1546
1547 dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1548 PORT100_COMM_RF_HEAD_MAX_LEN;
1549 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1550
1551 init_completion(&dev->cmd_cancel_done);
1552 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1553
1554 /* The first thing to do with the Port-100 is to set the command type
1555 * to be used. If supported we use command type 1. 0 otherwise.
1556 */
1557 cmd_type_mask = port100_get_command_type_mask(dev);
1558 if (!cmd_type_mask) {
1559 nfc_err(&interface->dev,
1560 "Could not get supported command types\n");
1561 rc = -ENODEV;
1562 goto error;
1563 }
1564
1565 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1566 dev->cmd_type = PORT100_CMD_TYPE_1;
1567 else
1568 dev->cmd_type = PORT100_CMD_TYPE_0;
1569
1570 rc = port100_set_command_type(dev, dev->cmd_type);
1571 if (rc) {
1572 nfc_err(&interface->dev,
1573 "The device does not support command type %u\n",
1574 dev->cmd_type);
1575 goto error;
1576 }
1577
1578 fw_version = port100_get_firmware_version(dev);
1579 if (!fw_version)
1580 nfc_err(&interface->dev,
1581 "Could not get device firmware version\n");
1582
1583 nfc_info(&interface->dev,
1584 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1585 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1586
1587 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1588 PORT100_PROTOCOLS,
1589 PORT100_CAPABILITIES,
1590 dev->skb_headroom,
1591 dev->skb_tailroom);
1592 if (!dev->nfc_digital_dev) {
1593 nfc_err(&interface->dev,
1594 "Could not allocate nfc_digital_dev\n");
1595 rc = -ENOMEM;
1596 goto error;
1597 }
1598
1599 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1600 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1601
1602 rc = nfc_digital_register_device(dev->nfc_digital_dev);
1603 if (rc) {
1604 nfc_err(&interface->dev,
1605 "Could not register digital device\n");
1606 goto free_nfc_dev;
1607 }
1608
1609 return 0;
1610
1611free_nfc_dev:
1612 nfc_digital_free_device(dev->nfc_digital_dev);
1613
1614error:
1615 usb_kill_urb(dev->in_urb);
1616 usb_free_urb(dev->in_urb);
1617 usb_kill_urb(dev->out_urb);
1618 usb_free_urb(dev->out_urb);
1619 usb_put_dev(dev->udev);
1620
1621 return rc;
1622}
1623
1624static void port100_disconnect(struct usb_interface *interface)
1625{
1626 struct port100 *dev;
1627
1628 dev = usb_get_intfdata(interface);
1629 usb_set_intfdata(interface, NULL);
1630
1631 nfc_digital_unregister_device(dev->nfc_digital_dev);
1632 nfc_digital_free_device(dev->nfc_digital_dev);
1633
1634 usb_kill_urb(dev->in_urb);
1635 usb_kill_urb(dev->out_urb);
1636
1637 usb_free_urb(dev->in_urb);
1638 usb_free_urb(dev->out_urb);
1639 usb_put_dev(dev->udev);
1640
1641 kfree(dev->cmd);
1642
1643 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n");
1644}
1645
1646static struct usb_driver port100_driver = {
1647 .name = "port100",
1648 .probe = port100_probe,
1649 .disconnect = port100_disconnect,
1650 .id_table = port100_table,
1651};
1652
1653module_usb_driver(port100_driver);
1654
1655MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1656MODULE_VERSION(VERSION);
1657MODULE_LICENSE("GPL");