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) */
44 static 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
92 struct port100;
93
94 typedef 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 */
106 struct 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
118 static 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 */
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 const 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_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
394 static const struct port100_protocol
395 tg_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
439 struct 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
470 struct 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
480 struct 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
489 struct port100_ack_frame {
490 u8 preamble;
491 __be16 start_frame;
492 __be16 ack_frame;
493 u8 postambule;
494 } __packed;
495
496 struct port100_cb_arg {
497 nfc_digital_cmd_complete_t complete_cb;
498 void *complete_arg;
499 u8 mdaa;
500 };
501
502 struct 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
514 struct 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 */
port100_checksum(u16 value)523 static 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 */
port100_data_checksum(const u8 * data,int datalen)529 static 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
port100_tx_frame_init(void * _frame,u8 cmd_code)540 static 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
port100_tx_frame_finish(void * _frame)552 static 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
port100_tx_update_payload_len(void * _frame,int len)564 static 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
port100_rx_frame_is_valid(const void * _frame)571 static 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
port100_rx_frame_is_ack(const struct port100_ack_frame * frame)592 static 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
port100_rx_frame_size(const void * frame)598 static 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
port100_rx_frame_is_cmd_response(const struct port100 * dev,const void * frame)606 static 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
port100_recv_response(struct urb * urb)614 static 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 (urb->actual_length < PORT100_FRAME_HEADER_LEN ||
640 urb->actual_length < port100_rx_frame_size(in_frame)) {
641 nfc_err(&dev->interface->dev, "Received a truncated frame\n");
642 cmd->status = -EIO;
643 goto sched_wq;
644 }
645
646 if (!port100_rx_frame_is_valid(in_frame)) {
647 nfc_err(&dev->interface->dev, "Received an invalid frame\n");
648 cmd->status = -EIO;
649 goto sched_wq;
650 }
651
652 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
653 port100_rx_frame_size(in_frame), false);
654
655 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
656 nfc_err(&dev->interface->dev,
657 "It's not the response to the last command\n");
658 cmd->status = -EIO;
659 goto sched_wq;
660 }
661
662 sched_wq:
663 schedule_work(&dev->cmd_complete_work);
664 }
665
port100_submit_urb_for_response(const struct port100 * dev,gfp_t flags)666 static int port100_submit_urb_for_response(const struct port100 *dev,
667 gfp_t flags)
668 {
669 dev->in_urb->complete = port100_recv_response;
670
671 return usb_submit_urb(dev->in_urb, flags);
672 }
673
port100_recv_ack(struct urb * urb)674 static void port100_recv_ack(struct urb *urb)
675 {
676 struct port100 *dev = urb->context;
677 struct port100_cmd *cmd = dev->cmd;
678 const struct port100_ack_frame *in_frame;
679 int rc;
680
681 cmd->status = urb->status;
682
683 switch (urb->status) {
684 case 0:
685 break; /* success */
686 case -ECONNRESET:
687 case -ENOENT:
688 nfc_dbg(&dev->interface->dev,
689 "The urb has been stopped (status %d)\n", urb->status);
690 goto sched_wq;
691 case -ESHUTDOWN:
692 default:
693 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
694 urb->status);
695 goto sched_wq;
696 }
697
698 in_frame = dev->in_urb->transfer_buffer;
699
700 if (!port100_rx_frame_is_ack(in_frame)) {
701 nfc_err(&dev->interface->dev, "Received an invalid ack\n");
702 cmd->status = -EIO;
703 goto sched_wq;
704 }
705
706 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
707 if (rc) {
708 nfc_err(&dev->interface->dev,
709 "usb_submit_urb failed with result %d\n", rc);
710 cmd->status = rc;
711 goto sched_wq;
712 }
713
714 return;
715
716 sched_wq:
717 schedule_work(&dev->cmd_complete_work);
718 }
719
port100_submit_urb_for_ack(const struct port100 * dev,gfp_t flags)720 static int port100_submit_urb_for_ack(const struct port100 *dev, gfp_t flags)
721 {
722 dev->in_urb->complete = port100_recv_ack;
723
724 return usb_submit_urb(dev->in_urb, flags);
725 }
726
port100_send_ack(struct port100 * dev)727 static int port100_send_ack(struct port100 *dev)
728 {
729 int rc = 0;
730
731 mutex_lock(&dev->out_urb_lock);
732
733 /*
734 * If prior cancel is in-flight (dev->cmd_cancel == true), we
735 * can skip to send cancel. Then this will wait the prior
736 * cancel, or merged into the next cancel rarely if next
737 * cancel was started before waiting done. In any case, this
738 * will be waked up soon or later.
739 */
740 if (!dev->cmd_cancel) {
741 reinit_completion(&dev->cmd_cancel_done);
742
743 usb_kill_urb(dev->out_urb);
744
745 dev->out_urb->transfer_buffer = ack_frame;
746 dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
747 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
748
749 /*
750 * Set the cmd_cancel flag only if the URB has been
751 * successfully submitted. It will be reset by the out
752 * URB completion callback port100_send_complete().
753 */
754 dev->cmd_cancel = !rc;
755 }
756
757 mutex_unlock(&dev->out_urb_lock);
758
759 if (!rc)
760 wait_for_completion(&dev->cmd_cancel_done);
761
762 return rc;
763 }
764
port100_send_frame_async(struct port100 * dev,const struct sk_buff * out,const struct sk_buff * in,int in_len)765 static int port100_send_frame_async(struct port100 *dev,
766 const struct sk_buff *out,
767 const struct sk_buff *in, int in_len)
768 {
769 int rc;
770
771 mutex_lock(&dev->out_urb_lock);
772
773 /* A command cancel frame as been sent through dev->out_urb. Don't try
774 * to submit a new one.
775 */
776 if (dev->cmd_cancel) {
777 rc = -EAGAIN;
778 goto exit;
779 }
780
781 dev->out_urb->transfer_buffer = out->data;
782 dev->out_urb->transfer_buffer_length = out->len;
783
784 dev->in_urb->transfer_buffer = in->data;
785 dev->in_urb->transfer_buffer_length = in_len;
786
787 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
788 out->data, out->len, false);
789
790 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
791 if (rc)
792 goto exit;
793
794 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
795 if (rc)
796 usb_kill_urb(dev->out_urb);
797
798 exit:
799 mutex_unlock(&dev->out_urb_lock);
800
801 return rc;
802 }
803
port100_build_cmd_frame(struct port100 * dev,u8 cmd_code,struct sk_buff * skb)804 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
805 struct sk_buff *skb)
806 {
807 /* payload is already there, just update datalen */
808 int payload_len = skb->len;
809
810 skb_push(skb, PORT100_FRAME_HEADER_LEN);
811 skb_put(skb, PORT100_FRAME_TAIL_LEN);
812
813 port100_tx_frame_init(skb->data, cmd_code);
814 port100_tx_update_payload_len(skb->data, payload_len);
815 port100_tx_frame_finish(skb->data);
816 }
817
port100_send_async_complete(struct port100 * dev)818 static void port100_send_async_complete(struct port100 *dev)
819 {
820 struct port100_cmd *cmd = dev->cmd;
821 int status = cmd->status;
822
823 struct sk_buff *req = cmd->req;
824 struct sk_buff *resp = cmd->resp;
825
826 dev_kfree_skb(req);
827
828 dev->cmd = NULL;
829
830 if (status < 0) {
831 cmd->complete_cb(dev, cmd->complete_cb_context,
832 ERR_PTR(status));
833 dev_kfree_skb(resp);
834 goto done;
835 }
836
837 skb_put(resp, port100_rx_frame_size(resp->data));
838 skb_pull(resp, PORT100_FRAME_HEADER_LEN);
839 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
840
841 cmd->complete_cb(dev, cmd->complete_cb_context, resp);
842
843 done:
844 kfree(cmd);
845 }
846
port100_send_cmd_async(struct port100 * dev,u8 cmd_code,struct sk_buff * req,port100_send_async_complete_t complete_cb,void * complete_cb_context)847 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
848 struct sk_buff *req,
849 port100_send_async_complete_t complete_cb,
850 void *complete_cb_context)
851 {
852 struct port100_cmd *cmd;
853 struct sk_buff *resp;
854 int rc;
855 int resp_len = PORT100_FRAME_HEADER_LEN +
856 PORT100_FRAME_MAX_PAYLOAD_LEN +
857 PORT100_FRAME_TAIL_LEN;
858
859 if (dev->cmd) {
860 nfc_err(&dev->interface->dev,
861 "A command is still in process\n");
862 return -EBUSY;
863 }
864
865 resp = alloc_skb(resp_len, GFP_KERNEL);
866 if (!resp)
867 return -ENOMEM;
868
869 cmd = kzalloc_obj(*cmd);
870 if (!cmd) {
871 dev_kfree_skb(resp);
872 return -ENOMEM;
873 }
874
875 cmd->code = cmd_code;
876 cmd->req = req;
877 cmd->resp = resp;
878 cmd->resp_len = resp_len;
879 cmd->complete_cb = complete_cb;
880 cmd->complete_cb_context = complete_cb_context;
881
882 port100_build_cmd_frame(dev, cmd_code, req);
883
884 dev->cmd = cmd;
885
886 rc = port100_send_frame_async(dev, req, resp, resp_len);
887 if (rc) {
888 kfree(cmd);
889 dev_kfree_skb(resp);
890 dev->cmd = NULL;
891 }
892
893 return rc;
894 }
895
896 struct port100_sync_cmd_response {
897 struct sk_buff *resp;
898 struct completion done;
899 };
900
port100_wq_cmd_complete(struct work_struct * work)901 static void port100_wq_cmd_complete(struct work_struct *work)
902 {
903 struct port100 *dev = container_of(work, struct port100,
904 cmd_complete_work);
905
906 port100_send_async_complete(dev);
907 }
908
port100_send_sync_complete(struct port100 * dev,void * _arg,struct sk_buff * resp)909 static void port100_send_sync_complete(struct port100 *dev, void *_arg,
910 struct sk_buff *resp)
911 {
912 struct port100_sync_cmd_response *arg = _arg;
913
914 arg->resp = resp;
915 complete(&arg->done);
916 }
917
port100_send_cmd_sync(struct port100 * dev,u8 cmd_code,struct sk_buff * req)918 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
919 struct sk_buff *req)
920 {
921 int rc;
922 struct port100_sync_cmd_response arg;
923
924 init_completion(&arg.done);
925
926 rc = port100_send_cmd_async(dev, cmd_code, req,
927 port100_send_sync_complete, &arg);
928 if (rc) {
929 dev_kfree_skb(req);
930 return ERR_PTR(rc);
931 }
932
933 wait_for_completion(&arg.done);
934
935 return arg.resp;
936 }
937
port100_send_complete(struct urb * urb)938 static void port100_send_complete(struct urb *urb)
939 {
940 struct port100 *dev = urb->context;
941
942 if (dev->cmd_cancel) {
943 complete_all(&dev->cmd_cancel_done);
944 dev->cmd_cancel = false;
945 }
946
947 switch (urb->status) {
948 case 0:
949 break; /* success */
950 case -ECONNRESET:
951 case -ENOENT:
952 nfc_dbg(&dev->interface->dev,
953 "The urb has been stopped (status %d)\n", urb->status);
954 break;
955 case -ESHUTDOWN:
956 default:
957 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
958 urb->status);
959 }
960 }
961
port100_abort_cmd(struct nfc_digital_dev * ddev)962 static void port100_abort_cmd(struct nfc_digital_dev *ddev)
963 {
964 struct port100 *dev = nfc_digital_get_drvdata(ddev);
965
966 /* An ack will cancel the last issued command */
967 port100_send_ack(dev);
968
969 /* cancel the urb request */
970 usb_kill_urb(dev->in_urb);
971 }
972
port100_alloc_skb(const struct port100 * dev,unsigned int size)973 static struct sk_buff *port100_alloc_skb(const struct port100 *dev, unsigned int size)
974 {
975 struct sk_buff *skb;
976
977 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
978 GFP_KERNEL);
979 if (skb)
980 skb_reserve(skb, dev->skb_headroom);
981
982 return skb;
983 }
984
port100_set_command_type(struct port100 * dev,u8 command_type)985 static int port100_set_command_type(struct port100 *dev, u8 command_type)
986 {
987 struct sk_buff *skb;
988 struct sk_buff *resp;
989 int rc;
990
991 skb = port100_alloc_skb(dev, 1);
992 if (!skb)
993 return -ENOMEM;
994
995 skb_put_u8(skb, command_type);
996
997 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
998 if (IS_ERR(resp))
999 return PTR_ERR(resp);
1000
1001 rc = resp->data[0];
1002
1003 dev_kfree_skb(resp);
1004
1005 return rc;
1006 }
1007
port100_get_command_type_mask(struct port100 * dev)1008 static u64 port100_get_command_type_mask(struct port100 *dev)
1009 {
1010 struct sk_buff *skb;
1011 struct sk_buff *resp;
1012 u64 mask;
1013
1014 skb = port100_alloc_skb(dev, 0);
1015 if (!skb)
1016 return 0;
1017
1018 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
1019 if (IS_ERR(resp))
1020 return 0;
1021
1022 if (resp->len < 8)
1023 mask = 0;
1024 else
1025 mask = be64_to_cpu(*(__be64 *)resp->data);
1026
1027 dev_kfree_skb(resp);
1028
1029 return mask;
1030 }
1031
port100_get_firmware_version(struct port100 * dev)1032 static u16 port100_get_firmware_version(struct port100 *dev)
1033 {
1034 struct sk_buff *skb;
1035 struct sk_buff *resp;
1036 u16 fw_ver;
1037
1038 skb = port100_alloc_skb(dev, 0);
1039 if (!skb)
1040 return 0;
1041
1042 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
1043 skb);
1044 if (IS_ERR(resp))
1045 return 0;
1046
1047 fw_ver = le16_to_cpu(*(__le16 *)resp->data);
1048
1049 dev_kfree_skb(resp);
1050
1051 return fw_ver;
1052 }
1053
port100_switch_rf(struct nfc_digital_dev * ddev,bool on)1054 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
1055 {
1056 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1057 struct sk_buff *skb, *resp;
1058
1059 skb = port100_alloc_skb(dev, 1);
1060 if (!skb)
1061 return -ENOMEM;
1062
1063 skb_put_u8(skb, on ? 1 : 0);
1064
1065 /* Cancel the last command if the device is being switched off */
1066 if (!on)
1067 port100_abort_cmd(ddev);
1068
1069 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
1070
1071 if (IS_ERR(resp))
1072 return PTR_ERR(resp);
1073
1074 dev_kfree_skb(resp);
1075
1076 return 0;
1077 }
1078
port100_in_set_rf(struct nfc_digital_dev * ddev,u8 rf)1079 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1080 {
1081 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1082 struct sk_buff *skb;
1083 struct sk_buff *resp;
1084 int rc;
1085
1086 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1087 return -EINVAL;
1088
1089 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
1090 if (!skb)
1091 return -ENOMEM;
1092
1093 skb_put_data(skb, &in_rf_settings[rf],
1094 sizeof(struct port100_in_rf_setting));
1095
1096 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
1097
1098 if (IS_ERR(resp))
1099 return PTR_ERR(resp);
1100
1101 rc = resp->data[0];
1102
1103 dev_kfree_skb(resp);
1104
1105 return rc;
1106 }
1107
port100_in_set_framing(struct nfc_digital_dev * ddev,int param)1108 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
1109 {
1110 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1111 const struct port100_protocol *protocols;
1112 struct sk_buff *skb;
1113 struct sk_buff *resp;
1114 int num_protocols;
1115 size_t size;
1116 int rc;
1117
1118 if (param >= NFC_DIGITAL_FRAMING_LAST)
1119 return -EINVAL;
1120
1121 protocols = in_protocols[param];
1122
1123 num_protocols = 0;
1124 while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1125 num_protocols++;
1126
1127 if (!num_protocols)
1128 return 0;
1129
1130 size = sizeof(struct port100_protocol) * num_protocols;
1131
1132 skb = port100_alloc_skb(dev, size);
1133 if (!skb)
1134 return -ENOMEM;
1135
1136 skb_put_data(skb, protocols, size);
1137
1138 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1139
1140 if (IS_ERR(resp))
1141 return PTR_ERR(resp);
1142
1143 rc = resp->data[0];
1144
1145 dev_kfree_skb(resp);
1146
1147 return rc;
1148 }
1149
port100_in_configure_hw(struct nfc_digital_dev * ddev,int type,int param)1150 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1151 int param)
1152 {
1153 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1154 return port100_in_set_rf(ddev, param);
1155
1156 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1157 return port100_in_set_framing(ddev, param);
1158
1159 return -EINVAL;
1160 }
1161
port100_in_comm_rf_complete(struct port100 * dev,void * arg,struct sk_buff * resp)1162 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1163 struct sk_buff *resp)
1164 {
1165 const struct port100_cb_arg *cb_arg = arg;
1166 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1167 u32 status;
1168 int rc;
1169
1170 if (IS_ERR(resp)) {
1171 rc = PTR_ERR(resp);
1172 goto exit;
1173 }
1174
1175 if (resp->len < 4) {
1176 nfc_err(&dev->interface->dev,
1177 "Invalid packet length received\n");
1178 rc = -EIO;
1179 goto error;
1180 }
1181
1182 status = le32_to_cpu(*(__le32 *)resp->data);
1183
1184 skb_pull(resp, sizeof(u32));
1185
1186 if (status == PORT100_CMD_STATUS_TIMEOUT) {
1187 rc = -ETIMEDOUT;
1188 goto error;
1189 }
1190
1191 if (status != PORT100_CMD_STATUS_OK) {
1192 nfc_err(&dev->interface->dev,
1193 "in_comm_rf failed with status 0x%08x\n", status);
1194 rc = -EIO;
1195 goto error;
1196 }
1197
1198 /* Remove collision bits byte */
1199 skb_pull(resp, 1);
1200
1201 goto exit;
1202
1203 error:
1204 kfree_skb(resp);
1205 resp = ERR_PTR(rc);
1206
1207 exit:
1208 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1209
1210 kfree(cb_arg);
1211 }
1212
port100_in_send_cmd(struct nfc_digital_dev * ddev,struct sk_buff * skb,u16 _timeout,nfc_digital_cmd_complete_t cb,void * arg)1213 static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1214 struct sk_buff *skb, u16 _timeout,
1215 nfc_digital_cmd_complete_t cb, void *arg)
1216 {
1217 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1218 struct port100_cb_arg *cb_arg;
1219 __le16 timeout;
1220
1221 cb_arg = kzalloc_obj(struct port100_cb_arg);
1222 if (!cb_arg)
1223 return -ENOMEM;
1224
1225 cb_arg->complete_cb = cb;
1226 cb_arg->complete_arg = arg;
1227
1228 timeout = cpu_to_le16(_timeout * 10);
1229
1230 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1231
1232 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1233 port100_in_comm_rf_complete, cb_arg);
1234 }
1235
port100_tg_set_rf(struct nfc_digital_dev * ddev,u8 rf)1236 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1237 {
1238 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1239 struct sk_buff *skb;
1240 struct sk_buff *resp;
1241 int rc;
1242
1243 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1244 return -EINVAL;
1245
1246 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1247 if (!skb)
1248 return -ENOMEM;
1249
1250 skb_put_data(skb, &tg_rf_settings[rf],
1251 sizeof(struct port100_tg_rf_setting));
1252
1253 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
1254
1255 if (IS_ERR(resp))
1256 return PTR_ERR(resp);
1257
1258 rc = resp->data[0];
1259
1260 dev_kfree_skb(resp);
1261
1262 return rc;
1263 }
1264
port100_tg_set_framing(struct nfc_digital_dev * ddev,int param)1265 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
1266 {
1267 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1268 const struct port100_protocol *protocols;
1269 struct sk_buff *skb;
1270 struct sk_buff *resp;
1271 int rc;
1272 int num_protocols;
1273 size_t size;
1274
1275 if (param >= NFC_DIGITAL_FRAMING_LAST)
1276 return -EINVAL;
1277
1278 protocols = tg_protocols[param];
1279
1280 num_protocols = 0;
1281 while (protocols[num_protocols].number != PORT100_TG_PROT_END)
1282 num_protocols++;
1283
1284 if (!num_protocols)
1285 return 0;
1286
1287 size = sizeof(struct port100_protocol) * num_protocols;
1288
1289 skb = port100_alloc_skb(dev, size);
1290 if (!skb)
1291 return -ENOMEM;
1292
1293 skb_put_data(skb, protocols, size);
1294
1295 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
1296
1297 if (IS_ERR(resp))
1298 return PTR_ERR(resp);
1299
1300 rc = resp->data[0];
1301
1302 dev_kfree_skb(resp);
1303
1304 return rc;
1305 }
1306
port100_tg_configure_hw(struct nfc_digital_dev * ddev,int type,int param)1307 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1308 int param)
1309 {
1310 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1311 return port100_tg_set_rf(ddev, param);
1312
1313 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1314 return port100_tg_set_framing(ddev, param);
1315
1316 return -EINVAL;
1317 }
1318
port100_tg_target_activated(struct port100 * dev,u8 tgt_activated)1319 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
1320 {
1321 u8 mask;
1322
1323 switch (dev->cmd_type) {
1324 case PORT100_CMD_TYPE_0:
1325 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
1326 break;
1327 case PORT100_CMD_TYPE_1:
1328 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
1329 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
1330 break;
1331 default:
1332 nfc_err(&dev->interface->dev, "Unknown command type\n");
1333 return false;
1334 }
1335
1336 return ((tgt_activated & mask) == mask);
1337 }
1338
port100_tg_comm_rf_complete(struct port100 * dev,void * arg,struct sk_buff * resp)1339 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
1340 struct sk_buff *resp)
1341 {
1342 u32 status;
1343 const struct port100_cb_arg *cb_arg = arg;
1344 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1345 struct port100_tg_comm_rf_res *hdr;
1346
1347 if (IS_ERR(resp))
1348 goto exit;
1349
1350 hdr = (struct port100_tg_comm_rf_res *)resp->data;
1351
1352 status = le32_to_cpu(hdr->status);
1353
1354 if (cb_arg->mdaa &&
1355 !port100_tg_target_activated(dev, hdr->target_activated)) {
1356 kfree_skb(resp);
1357 resp = ERR_PTR(-ETIMEDOUT);
1358
1359 goto exit;
1360 }
1361
1362 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
1363
1364 if (status != PORT100_CMD_STATUS_OK) {
1365 kfree_skb(resp);
1366
1367 if (status == PORT100_CMD_STATUS_TIMEOUT)
1368 resp = ERR_PTR(-ETIMEDOUT);
1369 else
1370 resp = ERR_PTR(-EIO);
1371 }
1372
1373 exit:
1374 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1375
1376 kfree(cb_arg);
1377 }
1378
port100_tg_send_cmd(struct nfc_digital_dev * ddev,struct sk_buff * skb,u16 timeout,nfc_digital_cmd_complete_t cb,void * arg)1379 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1380 struct sk_buff *skb, u16 timeout,
1381 nfc_digital_cmd_complete_t cb, void *arg)
1382 {
1383 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1384 struct port100_tg_comm_rf_cmd *hdr;
1385 struct port100_cb_arg *cb_arg;
1386
1387 cb_arg = kzalloc_obj(struct port100_cb_arg);
1388 if (!cb_arg)
1389 return -ENOMEM;
1390
1391 cb_arg->complete_cb = cb;
1392 cb_arg->complete_arg = arg;
1393
1394 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1395
1396 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1397
1398 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1399 hdr->guard_time = cpu_to_le16(500);
1400 hdr->send_timeout = cpu_to_le16(0xFFFF);
1401 hdr->recv_timeout = cpu_to_le16(timeout);
1402
1403 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1404 port100_tg_comm_rf_complete, cb_arg);
1405 }
1406
port100_listen_mdaa(struct nfc_digital_dev * ddev,struct digital_tg_mdaa_params * params,u16 timeout,nfc_digital_cmd_complete_t cb,void * arg)1407 static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1408 struct digital_tg_mdaa_params *params,
1409 u16 timeout,
1410 nfc_digital_cmd_complete_t cb, void *arg)
1411 {
1412 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1413 struct port100_tg_comm_rf_cmd *hdr;
1414 struct port100_cb_arg *cb_arg;
1415 struct sk_buff *skb;
1416 int rc;
1417
1418 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1419 NFC_DIGITAL_RF_TECH_106A);
1420 if (rc)
1421 return rc;
1422
1423 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1424 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1425 if (rc)
1426 return rc;
1427
1428 cb_arg = kzalloc_obj(struct port100_cb_arg);
1429 if (!cb_arg)
1430 return -ENOMEM;
1431
1432 cb_arg->complete_cb = cb;
1433 cb_arg->complete_arg = arg;
1434 cb_arg->mdaa = 1;
1435
1436 skb = port100_alloc_skb(dev, 0);
1437 if (!skb) {
1438 kfree(cb_arg);
1439 return -ENOMEM;
1440 }
1441
1442 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1443 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1444
1445 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1446
1447 hdr->guard_time = 0;
1448 hdr->send_timeout = cpu_to_le16(0xFFFF);
1449 hdr->mdaa = 1;
1450 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
1451 hdr->nfca_param[1] = params->sens_res & 0xFF;
1452 memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
1453 hdr->nfca_param[5] = params->sel_res;
1454 memcpy(hdr->nfcf_param, params->nfcid2, 8);
1455 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
1456 hdr->nfcf_param[17] = params->sc & 0xFF;
1457 hdr->recv_timeout = cpu_to_le16(timeout);
1458
1459 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1460 port100_tg_comm_rf_complete, cb_arg);
1461 }
1462
port100_listen(struct nfc_digital_dev * ddev,u16 timeout,nfc_digital_cmd_complete_t cb,void * arg)1463 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1464 nfc_digital_cmd_complete_t cb, void *arg)
1465 {
1466 const struct port100 *dev = nfc_digital_get_drvdata(ddev);
1467 struct sk_buff *skb;
1468
1469 skb = port100_alloc_skb(dev, 0);
1470 if (!skb)
1471 return -ENOMEM;
1472
1473 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
1474 }
1475
1476 static const struct nfc_digital_ops port100_digital_ops = {
1477 .in_configure_hw = port100_in_configure_hw,
1478 .in_send_cmd = port100_in_send_cmd,
1479
1480 .tg_listen_mdaa = port100_listen_mdaa,
1481 .tg_listen = port100_listen,
1482 .tg_configure_hw = port100_tg_configure_hw,
1483 .tg_send_cmd = port100_tg_send_cmd,
1484
1485 .switch_rf = port100_switch_rf,
1486 .abort_cmd = port100_abort_cmd,
1487 };
1488
1489 static const struct usb_device_id port100_table[] = {
1490 { USB_DEVICE(SONY_VENDOR_ID, RCS380S_PRODUCT_ID) },
1491 { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID) },
1492 { }
1493 };
1494 MODULE_DEVICE_TABLE(usb, port100_table);
1495
port100_probe(struct usb_interface * interface,const struct usb_device_id * id)1496 static int port100_probe(struct usb_interface *interface,
1497 const struct usb_device_id *id)
1498 {
1499 struct usb_endpoint_descriptor *ep_in, *ep_out;
1500 struct port100 *dev;
1501 int rc;
1502 u16 fw_version;
1503 u64 cmd_type_mask;
1504
1505 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1506 if (!dev)
1507 return -ENOMEM;
1508
1509 mutex_init(&dev->out_urb_lock);
1510 dev->udev = interface_to_usbdev(interface);
1511 dev->interface = interface;
1512 usb_set_intfdata(interface, dev);
1513
1514 rc = usb_find_common_endpoints(interface->cur_altsetting, &ep_in,
1515 &ep_out, NULL, NULL);
1516 if (rc) {
1517 nfc_err(&interface->dev,
1518 "Could not find bulk-in or bulk-out endpoint\n");
1519 goto error;
1520 }
1521
1522 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1523 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1524
1525 if (!dev->in_urb || !dev->out_urb) {
1526 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1527 rc = -ENOMEM;
1528 goto error;
1529 }
1530
1531 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1532 usb_rcvbulkpipe(dev->udev, usb_endpoint_num(ep_in)),
1533 NULL, 0, NULL, dev);
1534 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1535 usb_sndbulkpipe(dev->udev, usb_endpoint_num(ep_out)),
1536 NULL, 0, port100_send_complete, dev);
1537 dev->out_urb->transfer_flags = URB_ZERO_PACKET;
1538
1539 dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1540 PORT100_COMM_RF_HEAD_MAX_LEN;
1541 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1542
1543 init_completion(&dev->cmd_cancel_done);
1544 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1545
1546 /* The first thing to do with the Port-100 is to set the command type
1547 * to be used. If supported we use command type 1. 0 otherwise.
1548 */
1549 cmd_type_mask = port100_get_command_type_mask(dev);
1550 if (!cmd_type_mask) {
1551 nfc_err(&interface->dev,
1552 "Could not get supported command types\n");
1553 rc = -ENODEV;
1554 goto error;
1555 }
1556
1557 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1558 dev->cmd_type = PORT100_CMD_TYPE_1;
1559 else
1560 dev->cmd_type = PORT100_CMD_TYPE_0;
1561
1562 rc = port100_set_command_type(dev, dev->cmd_type);
1563 if (rc) {
1564 nfc_err(&interface->dev,
1565 "The device does not support command type %u\n",
1566 dev->cmd_type);
1567 goto error;
1568 }
1569
1570 fw_version = port100_get_firmware_version(dev);
1571 if (!fw_version)
1572 nfc_err(&interface->dev,
1573 "Could not get device firmware version\n");
1574
1575 nfc_info(&interface->dev,
1576 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1577 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1578
1579 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1580 PORT100_PROTOCOLS,
1581 PORT100_CAPABILITIES,
1582 dev->skb_headroom,
1583 dev->skb_tailroom);
1584 if (!dev->nfc_digital_dev) {
1585 nfc_err(&interface->dev,
1586 "Could not allocate nfc_digital_dev\n");
1587 rc = -ENOMEM;
1588 goto error;
1589 }
1590
1591 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1592 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1593
1594 rc = nfc_digital_register_device(dev->nfc_digital_dev);
1595 if (rc) {
1596 nfc_err(&interface->dev,
1597 "Could not register digital device\n");
1598 goto free_nfc_dev;
1599 }
1600
1601 return 0;
1602
1603 free_nfc_dev:
1604 nfc_digital_free_device(dev->nfc_digital_dev);
1605
1606 error:
1607 usb_kill_urb(dev->in_urb);
1608 usb_free_urb(dev->in_urb);
1609 usb_kill_urb(dev->out_urb);
1610 usb_free_urb(dev->out_urb);
1611
1612 return rc;
1613 }
1614
port100_disconnect(struct usb_interface * interface)1615 static void port100_disconnect(struct usb_interface *interface)
1616 {
1617 struct port100 *dev;
1618
1619 dev = usb_get_intfdata(interface);
1620 usb_set_intfdata(interface, NULL);
1621
1622 nfc_digital_unregister_device(dev->nfc_digital_dev);
1623 nfc_digital_free_device(dev->nfc_digital_dev);
1624
1625 usb_kill_urb(dev->in_urb);
1626 usb_kill_urb(dev->out_urb);
1627
1628 usb_free_urb(dev->in_urb);
1629 usb_free_urb(dev->out_urb);
1630
1631 kfree(dev->cmd);
1632
1633 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n");
1634 }
1635
1636 static struct usb_driver port100_driver = {
1637 .name = "port100",
1638 .probe = port100_probe,
1639 .disconnect = port100_disconnect,
1640 .id_table = port100_table,
1641 };
1642
1643 module_usb_driver(port100_driver);
1644
1645 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1646 MODULE_VERSION(VERSION);
1647 MODULE_LICENSE("GPL");
1648