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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / nfc / port100.c
blob8e4d355dc3aec4e6c0e75afe01f2e9b190009f68
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 * Setting sets structure for tg_set_rf command
149 *
150 * @tg_set_number: Represents the entry index in the port-100 RF Base Table.
151 * This table contains multiple RF setting sets required for RF
152 * communication. this field is used for both send and receive
153 * settings.
154 *
155 * @tg_comm_type: Sets the communication type to be used to send and receive
156 * data.
157 */
158 struct port100_tg_rf_setting {
159 u8 tg_set_number;
160 u8 tg_comm_type;
161 } __packed;
162
163 #define PORT100_COMM_TYPE_TG_106A 0x0B
164 #define PORT100_COMM_TYPE_TG_212F 0x0C
165 #define PORT100_COMM_TYPE_TG_424F 0x0D
166
167 static const struct port100_tg_rf_setting tg_rf_settings[] = {
168 [NFC_DIGITAL_RF_TECH_106A] = {
169 .tg_set_number = 8,
170 .tg_comm_type = PORT100_COMM_TYPE_TG_106A,
171 },
172 [NFC_DIGITAL_RF_TECH_212F] = {
173 .tg_set_number = 8,
174 .tg_comm_type = PORT100_COMM_TYPE_TG_212F,
175 },
176 [NFC_DIGITAL_RF_TECH_424F] = {
177 .tg_set_number = 8,
178 .tg_comm_type = PORT100_COMM_TYPE_TG_424F,
179 },
180 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
181 [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
182
183 };
184
185 #define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
186 #define PORT100_IN_PROT_ADD_CRC 0x01
187 #define PORT100_IN_PROT_CHECK_CRC 0x02
188 #define PORT100_IN_PROT_MULTI_CARD 0x03
189 #define PORT100_IN_PROT_ADD_PARITY 0x04
190 #define PORT100_IN_PROT_CHECK_PARITY 0x05
191 #define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06
192 #define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07
193 #define PORT100_IN_PROT_CRYPTO1 0x08
194 #define PORT100_IN_PROT_ADD_SOF 0x09
195 #define PORT100_IN_PROT_CHECK_SOF 0x0A
196 #define PORT100_IN_PROT_ADD_EOF 0x0B
197 #define PORT100_IN_PROT_CHECK_EOF 0x0C
198 #define PORT100_IN_PROT_DEAF_TIME 0x0E
199 #define PORT100_IN_PROT_CRM 0x0F
200 #define PORT100_IN_PROT_CRM_MIN_LEN 0x10
201 #define PORT100_IN_PROT_T1_TAG_FRAME 0x11
202 #define PORT100_IN_PROT_RFCA 0x12
203 #define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
204 #define PORT100_IN_PROT_END 0x14
205
206 #define PORT100_IN_MAX_NUM_PROTOCOLS 19
207
208 #define PORT100_TG_PROT_TU 0x00
209 #define PORT100_TG_PROT_RF_OFF 0x01
210 #define PORT100_TG_PROT_CRM 0x02
211 #define PORT100_TG_PROT_END 0x03
212
213 #define PORT100_TG_MAX_NUM_PROTOCOLS 3
214
215 struct port100_protocol {
216 u8 number;
217 u8 value;
218 } __packed;
219
220 static struct port100_protocol
221 in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
222 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
223 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
224 { PORT100_IN_PROT_ADD_CRC, 0 },
225 { PORT100_IN_PROT_CHECK_CRC, 0 },
226 { PORT100_IN_PROT_MULTI_CARD, 0 },
227 { PORT100_IN_PROT_ADD_PARITY, 0 },
228 { PORT100_IN_PROT_CHECK_PARITY, 1 },
229 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
230 { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 },
231 { PORT100_IN_PROT_CRYPTO1, 0 },
232 { PORT100_IN_PROT_ADD_SOF, 0 },
233 { PORT100_IN_PROT_CHECK_SOF, 0 },
234 { PORT100_IN_PROT_ADD_EOF, 0 },
235 { PORT100_IN_PROT_CHECK_EOF, 0 },
236 { PORT100_IN_PROT_DEAF_TIME, 4 },
237 { PORT100_IN_PROT_CRM, 0 },
238 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
239 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
240 { PORT100_IN_PROT_RFCA, 0 },
241 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
242 { PORT100_IN_PROT_END, 0 },
243 },
244 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
245 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
246 { PORT100_IN_PROT_ADD_CRC, 0 },
247 { PORT100_IN_PROT_CHECK_CRC, 0 },
248 { PORT100_IN_PROT_MULTI_CARD, 0 },
249 { PORT100_IN_PROT_ADD_PARITY, 1 },
250 { PORT100_IN_PROT_CHECK_PARITY, 1 },
251 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
252 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
253 { PORT100_IN_PROT_CRYPTO1, 0 },
254 { PORT100_IN_PROT_ADD_SOF, 0 },
255 { PORT100_IN_PROT_CHECK_SOF, 0 },
256 { PORT100_IN_PROT_ADD_EOF, 0 },
257 { PORT100_IN_PROT_CHECK_EOF, 0 },
258 { PORT100_IN_PROT_DEAF_TIME, 4 },
259 { PORT100_IN_PROT_CRM, 0 },
260 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
261 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
262 { PORT100_IN_PROT_RFCA, 0 },
263 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
264 { PORT100_IN_PROT_END, 0 },
265 },
266 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
267 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
268 { PORT100_IN_PROT_ADD_CRC, 1 },
269 { PORT100_IN_PROT_CHECK_CRC, 1 },
270 { PORT100_IN_PROT_MULTI_CARD, 0 },
271 { PORT100_IN_PROT_ADD_PARITY, 1 },
272 { PORT100_IN_PROT_CHECK_PARITY, 1 },
273 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
274 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
275 { PORT100_IN_PROT_CRYPTO1, 0 },
276 { PORT100_IN_PROT_ADD_SOF, 0 },
277 { PORT100_IN_PROT_CHECK_SOF, 0 },
278 { PORT100_IN_PROT_ADD_EOF, 0 },
279 { PORT100_IN_PROT_CHECK_EOF, 0 },
280 { PORT100_IN_PROT_DEAF_TIME, 4 },
281 { PORT100_IN_PROT_CRM, 0 },
282 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
283 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
284 { PORT100_IN_PROT_RFCA, 0 },
285 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
286 { PORT100_IN_PROT_END, 0 },
287 },
288 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
289 /* nfc_digital_framing_nfca_short */
290 { PORT100_IN_PROT_ADD_CRC, 2 },
291 { PORT100_IN_PROT_CHECK_CRC, 2 },
292 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
293 { PORT100_IN_PROT_T1_TAG_FRAME, 2 },
294 { PORT100_IN_PROT_END, 0 },
295 },
296 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
297 /* nfc_digital_framing_nfca_standard */
298 { PORT100_IN_PROT_ADD_CRC, 1 },
299 { PORT100_IN_PROT_CHECK_CRC, 0 },
300 { PORT100_IN_PROT_END, 0 },
301 },
302 [NFC_DIGITAL_FRAMING_NFCA_T4T] = {
303 /* nfc_digital_framing_nfca_standard_with_crc_a */
304 { PORT100_IN_PROT_END, 0 },
305 },
306 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
307 /* nfc_digital_framing_nfca_standard */
308 { PORT100_IN_PROT_END, 0 },
309 },
310 [NFC_DIGITAL_FRAMING_NFCF] = {
311 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
312 { PORT100_IN_PROT_ADD_CRC, 1 },
313 { PORT100_IN_PROT_CHECK_CRC, 1 },
314 { PORT100_IN_PROT_MULTI_CARD, 0 },
315 { PORT100_IN_PROT_ADD_PARITY, 0 },
316 { PORT100_IN_PROT_CHECK_PARITY, 0 },
317 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
318 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
319 { PORT100_IN_PROT_CRYPTO1, 0 },
320 { PORT100_IN_PROT_ADD_SOF, 0 },
321 { PORT100_IN_PROT_CHECK_SOF, 0 },
322 { PORT100_IN_PROT_ADD_EOF, 0 },
323 { PORT100_IN_PROT_CHECK_EOF, 0 },
324 { PORT100_IN_PROT_DEAF_TIME, 4 },
325 { PORT100_IN_PROT_CRM, 0 },
326 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
327 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
328 { PORT100_IN_PROT_RFCA, 0 },
329 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
330 { PORT100_IN_PROT_END, 0 },
331 },
332 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
333 /* nfc_digital_framing_nfcf */
334 { PORT100_IN_PROT_END, 0 },
335 },
336 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
337 /* nfc_digital_framing_nfcf */
338 { PORT100_IN_PROT_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 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 */
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 */
529 static u8 port100_data_checksum(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
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
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
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
571 static bool port100_rx_frame_is_valid(void *_frame)
572 {
573 u8 checksum;
574 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
592 static bool port100_rx_frame_is_ack(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
598 static inline int port100_rx_frame_size(void *frame)
599 {
600 struct port100_frame *f = frame;
601
602 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
603 PORT100_FRAME_TAIL_LEN;
604 }
605
606 static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
607 {
608 struct port100_frame *f = frame;
609
610 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
611 }
612
613 static void port100_recv_response(struct urb *urb)
614 {
615 struct port100 *dev = urb->context;
616 struct port100_cmd *cmd = dev->cmd;
617 u8 *in_frame;
618
619 cmd->status = urb->status;
620
621 switch (urb->status) {
622 case 0:
623 break; /* success */
624 case -ECONNRESET:
625 case -ENOENT:
626 nfc_err(&dev->interface->dev,
627 "The urb has been canceled (status %d)\n", urb->status);
628 goto sched_wq;
629 case -ESHUTDOWN:
630 default:
631 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
632 urb->status);
633 goto sched_wq;
634 }
635
636 in_frame = dev->in_urb->transfer_buffer;
637
638 if (!port100_rx_frame_is_valid(in_frame)) {
639 nfc_err(&dev->interface->dev, "Received an invalid frame\n");
640 cmd->status = -EIO;
641 goto sched_wq;
642 }
643
644 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
645 port100_rx_frame_size(in_frame), false);
646
647 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
648 nfc_err(&dev->interface->dev,
649 "It's not the response to the last command\n");
650 cmd->status = -EIO;
651 goto sched_wq;
652 }
653
654 sched_wq:
655 schedule_work(&dev->cmd_complete_work);
656 }
657
658 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
659 {
660 dev->in_urb->complete = port100_recv_response;
661
662 return usb_submit_urb(dev->in_urb, flags);
663 }
664
665 static void port100_recv_ack(struct urb *urb)
666 {
667 struct port100 *dev = urb->context;
668 struct port100_cmd *cmd = dev->cmd;
669 struct port100_ack_frame *in_frame;
670 int rc;
671
672 cmd->status = urb->status;
673
674 switch (urb->status) {
675 case 0:
676 break; /* success */
677 case -ECONNRESET:
678 case -ENOENT:
679 nfc_err(&dev->interface->dev,
680 "The urb has been stopped (status %d)\n", urb->status);
681 goto sched_wq;
682 case -ESHUTDOWN:
683 default:
684 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
685 urb->status);
686 goto sched_wq;
687 }
688
689 in_frame = dev->in_urb->transfer_buffer;
690
691 if (!port100_rx_frame_is_ack(in_frame)) {
692 nfc_err(&dev->interface->dev, "Received an invalid ack\n");
693 cmd->status = -EIO;
694 goto sched_wq;
695 }
696
697 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
698 if (rc) {
699 nfc_err(&dev->interface->dev,
700 "usb_submit_urb failed with result %d\n", rc);
701 cmd->status = rc;
702 goto sched_wq;
703 }
704
705 return;
706
707 sched_wq:
708 schedule_work(&dev->cmd_complete_work);
709 }
710
711 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
712 {
713 dev->in_urb->complete = port100_recv_ack;
714
715 return usb_submit_urb(dev->in_urb, flags);
716 }
717
718 static int port100_send_ack(struct port100 *dev)
719 {
720 int rc = 0;
721
722 mutex_lock(&dev->out_urb_lock);
723
724 /*
725 * If prior cancel is in-flight (dev->cmd_cancel == true), we
726 * can skip to send cancel. Then this will wait the prior
727 * cancel, or merged into the next cancel rarely if next
728 * cancel was started before waiting done. In any case, this
729 * will be waked up soon or later.
730 */
731 if (!dev->cmd_cancel) {
732 reinit_completion(&dev->cmd_cancel_done);
733
734 usb_kill_urb(dev->out_urb);
735
736 dev->out_urb->transfer_buffer = ack_frame;
737 dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
738 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
739
740 /*
741 * Set the cmd_cancel flag only if the URB has been
742 * successfully submitted. It will be reset by the out
743 * URB completion callback port100_send_complete().
744 */
745 dev->cmd_cancel = !rc;
746 }
747
748 mutex_unlock(&dev->out_urb_lock);
749
750 if (!rc)
751 wait_for_completion(&dev->cmd_cancel_done);
752
753 return rc;
754 }
755
756 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
757 struct sk_buff *in, int in_len)
758 {
759 int rc;
760
761 mutex_lock(&dev->out_urb_lock);
762
763 /* A command cancel frame as been sent through dev->out_urb. Don't try
764 * to submit a new one.
765 */
766 if (dev->cmd_cancel) {
767 rc = -EAGAIN;
768 goto exit;
769 }
770
771 dev->out_urb->transfer_buffer = out->data;
772 dev->out_urb->transfer_buffer_length = out->len;
773
774 dev->in_urb->transfer_buffer = in->data;
775 dev->in_urb->transfer_buffer_length = in_len;
776
777 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
778 out->data, out->len, false);
779
780 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
781 if (rc)
782 goto exit;
783
784 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
785 if (rc)
786 usb_kill_urb(dev->out_urb);
787
788 exit:
789 mutex_unlock(&dev->out_urb_lock);
790
791 return rc;
792 }
793
794 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
795 struct sk_buff *skb)
796 {
797 /* payload is already there, just update datalen */
798 int payload_len = skb->len;
799
800 skb_push(skb, PORT100_FRAME_HEADER_LEN);
801 skb_put(skb, PORT100_FRAME_TAIL_LEN);
802
803 port100_tx_frame_init(skb->data, cmd_code);
804 port100_tx_update_payload_len(skb->data, payload_len);
805 port100_tx_frame_finish(skb->data);
806 }
807
808 static void port100_send_async_complete(struct port100 *dev)
809 {
810 struct port100_cmd *cmd = dev->cmd;
811 int status = cmd->status;
812
813 struct sk_buff *req = cmd->req;
814 struct sk_buff *resp = cmd->resp;
815
816 dev_kfree_skb(req);
817
818 dev->cmd = NULL;
819
820 if (status < 0) {
821 cmd->complete_cb(dev, cmd->complete_cb_context,
822 ERR_PTR(status));
823 dev_kfree_skb(resp);
824 goto done;
825 }
826
827 skb_put(resp, port100_rx_frame_size(resp->data));
828 skb_pull(resp, PORT100_FRAME_HEADER_LEN);
829 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
830
831 cmd->complete_cb(dev, cmd->complete_cb_context, resp);
832
833 done:
834 kfree(cmd);
835 }
836
837 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
838 struct sk_buff *req,
839 port100_send_async_complete_t complete_cb,
840 void *complete_cb_context)
841 {
842 struct port100_cmd *cmd;
843 struct sk_buff *resp;
844 int rc;
845 int resp_len = PORT100_FRAME_HEADER_LEN +
846 PORT100_FRAME_MAX_PAYLOAD_LEN +
847 PORT100_FRAME_TAIL_LEN;
848
849 if (dev->cmd) {
850 nfc_err(&dev->interface->dev,
851 "A command is still in process\n");
852 return -EBUSY;
853 }
854
855 resp = alloc_skb(resp_len, GFP_KERNEL);
856 if (!resp)
857 return -ENOMEM;
858
859 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
860 if (!cmd) {
861 dev_kfree_skb(resp);
862 return -ENOMEM;
863 }
864
865 cmd->code = cmd_code;
866 cmd->req = req;
867 cmd->resp = resp;
868 cmd->resp_len = resp_len;
869 cmd->complete_cb = complete_cb;
870 cmd->complete_cb_context = complete_cb_context;
871
872 port100_build_cmd_frame(dev, cmd_code, req);
873
874 dev->cmd = cmd;
875
876 rc = port100_send_frame_async(dev, req, resp, resp_len);
877 if (rc) {
878 kfree(cmd);
879 dev_kfree_skb(resp);
880 dev->cmd = NULL;
881 }
882
883 return rc;
884 }
885
886 struct port100_sync_cmd_response {
887 struct sk_buff *resp;
888 struct completion done;
889 };
890
891 static void port100_wq_cmd_complete(struct work_struct *work)
892 {
893 struct port100 *dev = container_of(work, struct port100,
894 cmd_complete_work);
895
896 port100_send_async_complete(dev);
897 }
898
899 static void port100_send_sync_complete(struct port100 *dev, void *_arg,
900 struct sk_buff *resp)
901 {
902 struct port100_sync_cmd_response *arg = _arg;
903
904 arg->resp = resp;
905 complete(&arg->done);
906 }
907
908 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
909 struct sk_buff *req)
910 {
911 int rc;
912 struct port100_sync_cmd_response arg;
913
914 init_completion(&arg.done);
915
916 rc = port100_send_cmd_async(dev, cmd_code, req,
917 port100_send_sync_complete, &arg);
918 if (rc) {
919 dev_kfree_skb(req);
920 return ERR_PTR(rc);
921 }
922
923 wait_for_completion(&arg.done);
924
925 return arg.resp;
926 }
927
928 static void port100_send_complete(struct urb *urb)
929 {
930 struct port100 *dev = urb->context;
931
932 if (dev->cmd_cancel) {
933 complete_all(&dev->cmd_cancel_done);
934 dev->cmd_cancel = false;
935 }
936
937 switch (urb->status) {
938 case 0:
939 break; /* success */
940 case -ECONNRESET:
941 case -ENOENT:
942 nfc_err(&dev->interface->dev,
943 "The urb has been stopped (status %d)\n", urb->status);
944 break;
945 case -ESHUTDOWN:
946 default:
947 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
948 urb->status);
949 }
950 }
951
952 static void port100_abort_cmd(struct nfc_digital_dev *ddev)
953 {
954 struct port100 *dev = nfc_digital_get_drvdata(ddev);
955
956 /* An ack will cancel the last issued command */
957 port100_send_ack(dev);
958
959 /* cancel the urb request */
960 usb_kill_urb(dev->in_urb);
961 }
962
963 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
964 {
965 struct sk_buff *skb;
966
967 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
968 GFP_KERNEL);
969 if (skb)
970 skb_reserve(skb, dev->skb_headroom);
971
972 return skb;
973 }
974
975 static int port100_set_command_type(struct port100 *dev, u8 command_type)
976 {
977 struct sk_buff *skb;
978 struct sk_buff *resp;
979 int rc;
980
981 skb = port100_alloc_skb(dev, 1);
982 if (!skb)
983 return -ENOMEM;
984
985 skb_put_u8(skb, command_type);
986
987 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
988 if (IS_ERR(resp))
989 return PTR_ERR(resp);
990
991 rc = resp->data[0];
992
993 dev_kfree_skb(resp);
994
995 return rc;
996 }
997
998 static u64 port100_get_command_type_mask(struct port100 *dev)
999 {
1000 struct sk_buff *skb;
1001 struct sk_buff *resp;
1002 u64 mask;
1003
1004 skb = port100_alloc_skb(dev, 0);
1005 if (!skb)
1006 return -ENOMEM;
1007
1008 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
1009 if (IS_ERR(resp))
1010 return PTR_ERR(resp);
1011
1012 if (resp->len < 8)
1013 mask = 0;
1014 else
1015 mask = be64_to_cpu(*(__be64 *)resp->data);
1016
1017 dev_kfree_skb(resp);
1018
1019 return mask;
1020 }
1021
1022 static u16 port100_get_firmware_version(struct port100 *dev)
1023 {
1024 struct sk_buff *skb;
1025 struct sk_buff *resp;
1026 u16 fw_ver;
1027
1028 skb = port100_alloc_skb(dev, 0);
1029 if (!skb)
1030 return 0;
1031
1032 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
1033 skb);
1034 if (IS_ERR(resp))
1035 return 0;
1036
1037 fw_ver = le16_to_cpu(*(__le16 *)resp->data);
1038
1039 dev_kfree_skb(resp);
1040
1041 return fw_ver;
1042 }
1043
1044 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
1045 {
1046 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1047 struct sk_buff *skb, *resp;
1048
1049 skb = port100_alloc_skb(dev, 1);
1050 if (!skb)
1051 return -ENOMEM;
1052
1053 skb_put_u8(skb, on ? 1 : 0);
1054
1055 /* Cancel the last command if the device is being switched off */
1056 if (!on)
1057 port100_abort_cmd(ddev);
1058
1059 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
1060
1061 if (IS_ERR(resp))
1062 return PTR_ERR(resp);
1063
1064 dev_kfree_skb(resp);
1065
1066 return 0;
1067 }
1068
1069 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1070 {
1071 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1072 struct sk_buff *skb;
1073 struct sk_buff *resp;
1074 int rc;
1075
1076 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1077 return -EINVAL;
1078
1079 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
1080 if (!skb)
1081 return -ENOMEM;
1082
1083 skb_put_data(skb, &in_rf_settings[rf],
1084 sizeof(struct port100_in_rf_setting));
1085
1086 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
1087
1088 if (IS_ERR(resp))
1089 return PTR_ERR(resp);
1090
1091 rc = resp->data[0];
1092
1093 dev_kfree_skb(resp);
1094
1095 return rc;
1096 }
1097
1098 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
1099 {
1100 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1101 struct port100_protocol *protocols;
1102 struct sk_buff *skb;
1103 struct sk_buff *resp;
1104 int num_protocols;
1105 size_t size;
1106 int rc;
1107
1108 if (param >= NFC_DIGITAL_FRAMING_LAST)
1109 return -EINVAL;
1110
1111 protocols = in_protocols[param];
1112
1113 num_protocols = 0;
1114 while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1115 num_protocols++;
1116
1117 if (!num_protocols)
1118 return 0;
1119
1120 size = sizeof(struct port100_protocol) * num_protocols;
1121
1122 skb = port100_alloc_skb(dev, size);
1123 if (!skb)
1124 return -ENOMEM;
1125
1126 skb_put_data(skb, protocols, size);
1127
1128 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1129
1130 if (IS_ERR(resp))
1131 return PTR_ERR(resp);
1132
1133 rc = resp->data[0];
1134
1135 dev_kfree_skb(resp);
1136
1137 return rc;
1138 }
1139
1140 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1141 int param)
1142 {
1143 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1144 return port100_in_set_rf(ddev, param);
1145
1146 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1147 return port100_in_set_framing(ddev, param);
1148
1149 return -EINVAL;
1150 }
1151
1152 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1153 struct sk_buff *resp)
1154 {
1155 struct port100_cb_arg *cb_arg = arg;
1156 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1157 u32 status;
1158 int rc;
1159
1160 if (IS_ERR(resp)) {
1161 rc = PTR_ERR(resp);
1162 goto exit;
1163 }
1164
1165 if (resp->len < 4) {
1166 nfc_err(&dev->interface->dev,
1167 "Invalid packet length received\n");
1168 rc = -EIO;
1169 goto error;
1170 }
1171
1172 status = le32_to_cpu(*(__le32 *)resp->data);
1173
1174 skb_pull(resp, sizeof(u32));
1175
1176 if (status == PORT100_CMD_STATUS_TIMEOUT) {
1177 rc = -ETIMEDOUT;
1178 goto error;
1179 }
1180
1181 if (status != PORT100_CMD_STATUS_OK) {
1182 nfc_err(&dev->interface->dev,
1183 "in_comm_rf failed with status 0x%08x\n", status);
1184 rc = -EIO;
1185 goto error;
1186 }
1187
1188 /* Remove collision bits byte */
1189 skb_pull(resp, 1);
1190
1191 goto exit;
1192
1193 error:
1194 kfree_skb(resp);
1195 resp = ERR_PTR(rc);
1196
1197 exit:
1198 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1199
1200 kfree(cb_arg);
1201 }
1202
1203 static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1204 struct sk_buff *skb, u16 _timeout,
1205 nfc_digital_cmd_complete_t cb, void *arg)
1206 {
1207 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1208 struct port100_cb_arg *cb_arg;
1209 __le16 timeout;
1210
1211 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1212 if (!cb_arg)
1213 return -ENOMEM;
1214
1215 cb_arg->complete_cb = cb;
1216 cb_arg->complete_arg = arg;
1217
1218 timeout = cpu_to_le16(_timeout * 10);
1219
1220 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1221
1222 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1223 port100_in_comm_rf_complete, cb_arg);
1224 }
1225
1226 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1227 {
1228 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1229 struct sk_buff *skb;
1230 struct sk_buff *resp;
1231 int rc;
1232
1233 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1234 return -EINVAL;
1235
1236 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1237 if (!skb)
1238 return -ENOMEM;
1239
1240 skb_put_data(skb, &tg_rf_settings[rf],
1241 sizeof(struct port100_tg_rf_setting));
1242
1243 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
1244
1245 if (IS_ERR(resp))
1246 return PTR_ERR(resp);
1247
1248 rc = resp->data[0];
1249
1250 dev_kfree_skb(resp);
1251
1252 return rc;
1253 }
1254
1255 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
1256 {
1257 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1258 struct port100_protocol *protocols;
1259 struct sk_buff *skb;
1260 struct sk_buff *resp;
1261 int rc;
1262 int num_protocols;
1263 size_t size;
1264
1265 if (param >= NFC_DIGITAL_FRAMING_LAST)
1266 return -EINVAL;
1267
1268 protocols = tg_protocols[param];
1269
1270 num_protocols = 0;
1271 while (protocols[num_protocols].number != PORT100_TG_PROT_END)
1272 num_protocols++;
1273
1274 if (!num_protocols)
1275 return 0;
1276
1277 size = sizeof(struct port100_protocol) * num_protocols;
1278
1279 skb = port100_alloc_skb(dev, size);
1280 if (!skb)
1281 return -ENOMEM;
1282
1283 skb_put_data(skb, protocols, size);
1284
1285 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
1286
1287 if (IS_ERR(resp))
1288 return PTR_ERR(resp);
1289
1290 rc = resp->data[0];
1291
1292 dev_kfree_skb(resp);
1293
1294 return rc;
1295 }
1296
1297 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1298 int param)
1299 {
1300 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1301 return port100_tg_set_rf(ddev, param);
1302
1303 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1304 return port100_tg_set_framing(ddev, param);
1305
1306 return -EINVAL;
1307 }
1308
1309 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
1310 {
1311 u8 mask;
1312
1313 switch (dev->cmd_type) {
1314 case PORT100_CMD_TYPE_0:
1315 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
1316 break;
1317 case PORT100_CMD_TYPE_1:
1318 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
1319 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
1320 break;
1321 default:
1322 nfc_err(&dev->interface->dev, "Unknown command type\n");
1323 return false;
1324 }
1325
1326 return ((tgt_activated & mask) == mask);
1327 }
1328
1329 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
1330 struct sk_buff *resp)
1331 {
1332 u32 status;
1333 struct port100_cb_arg *cb_arg = arg;
1334 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1335 struct port100_tg_comm_rf_res *hdr;
1336
1337 if (IS_ERR(resp))
1338 goto exit;
1339
1340 hdr = (struct port100_tg_comm_rf_res *)resp->data;
1341
1342 status = le32_to_cpu(hdr->status);
1343
1344 if (cb_arg->mdaa &&
1345 !port100_tg_target_activated(dev, hdr->target_activated)) {
1346 kfree_skb(resp);
1347 resp = ERR_PTR(-ETIMEDOUT);
1348
1349 goto exit;
1350 }
1351
1352 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
1353
1354 if (status != PORT100_CMD_STATUS_OK) {
1355 kfree_skb(resp);
1356
1357 if (status == PORT100_CMD_STATUS_TIMEOUT)
1358 resp = ERR_PTR(-ETIMEDOUT);
1359 else
1360 resp = ERR_PTR(-EIO);
1361 }
1362
1363 exit:
1364 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1365
1366 kfree(cb_arg);
1367 }
1368
1369 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1370 struct sk_buff *skb, u16 timeout,
1371 nfc_digital_cmd_complete_t cb, void *arg)
1372 {
1373 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1374 struct port100_tg_comm_rf_cmd *hdr;
1375 struct port100_cb_arg *cb_arg;
1376
1377 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1378 if (!cb_arg)
1379 return -ENOMEM;
1380
1381 cb_arg->complete_cb = cb;
1382 cb_arg->complete_arg = arg;
1383
1384 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1385
1386 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1387
1388 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1389 hdr->guard_time = cpu_to_le16(500);
1390 hdr->send_timeout = cpu_to_le16(0xFFFF);
1391 hdr->recv_timeout = cpu_to_le16(timeout);
1392
1393 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1394 port100_tg_comm_rf_complete, cb_arg);
1395 }
1396
1397 static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1398 struct digital_tg_mdaa_params *params,
1399 u16 timeout,
1400 nfc_digital_cmd_complete_t cb, void *arg)
1401 {
1402 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1403 struct port100_tg_comm_rf_cmd *hdr;
1404 struct port100_cb_arg *cb_arg;
1405 struct sk_buff *skb;
1406 int rc;
1407
1408 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1409 NFC_DIGITAL_RF_TECH_106A);
1410 if (rc)
1411 return rc;
1412
1413 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1414 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1415 if (rc)
1416 return rc;
1417
1418 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1419 if (!cb_arg)
1420 return -ENOMEM;
1421
1422 cb_arg->complete_cb = cb;
1423 cb_arg->complete_arg = arg;
1424 cb_arg->mdaa = 1;
1425
1426 skb = port100_alloc_skb(dev, 0);
1427 if (!skb) {
1428 kfree(cb_arg);
1429 return -ENOMEM;
1430 }
1431
1432 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1433 hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1434
1435 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1436
1437 hdr->guard_time = 0;
1438 hdr->send_timeout = cpu_to_le16(0xFFFF);
1439 hdr->mdaa = 1;
1440 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
1441 hdr->nfca_param[1] = params->sens_res & 0xFF;
1442 memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
1443 hdr->nfca_param[5] = params->sel_res;
1444 memcpy(hdr->nfcf_param, params->nfcid2, 8);
1445 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
1446 hdr->nfcf_param[17] = params->sc & 0xFF;
1447 hdr->recv_timeout = cpu_to_le16(timeout);
1448
1449 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1450 port100_tg_comm_rf_complete, cb_arg);
1451 }
1452
1453 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1454 nfc_digital_cmd_complete_t cb, void *arg)
1455 {
1456 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1457 struct sk_buff *skb;
1458
1459 skb = port100_alloc_skb(dev, 0);
1460 if (!skb)
1461 return -ENOMEM;
1462
1463 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
1464 }
1465
1466 static struct nfc_digital_ops port100_digital_ops = {
1467 .in_configure_hw = port100_in_configure_hw,
1468 .in_send_cmd = port100_in_send_cmd,
1469
1470 .tg_listen_mdaa = port100_listen_mdaa,
1471 .tg_listen = port100_listen,
1472 .tg_configure_hw = port100_tg_configure_hw,
1473 .tg_send_cmd = port100_tg_send_cmd,
1474
1475 .switch_rf = port100_switch_rf,
1476 .abort_cmd = port100_abort_cmd,
1477 };
1478
1479 static const struct usb_device_id port100_table[] = {
1480 { USB_DEVICE(SONY_VENDOR_ID, RCS380S_PRODUCT_ID), },
1481 { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID), },
1482 { }
1483 };
1484 MODULE_DEVICE_TABLE(usb, port100_table);
1485
1486 static int port100_probe(struct usb_interface *interface,
1487 const struct usb_device_id *id)
1488 {
1489 struct port100 *dev;
1490 int rc;
1491 struct usb_host_interface *iface_desc;
1492 struct usb_endpoint_descriptor *endpoint;
1493 int in_endpoint;
1494 int out_endpoint;
1495 u16 fw_version;
1496 u64 cmd_type_mask;
1497 int i;
1498
1499 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1500 if (!dev)
1501 return -ENOMEM;
1502
1503 mutex_init(&dev->out_urb_lock);
1504 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1505 dev->interface = interface;
1506 usb_set_intfdata(interface, dev);
1507
1508 in_endpoint = out_endpoint = 0;
1509 iface_desc = interface->cur_altsetting;
1510 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1511 endpoint = &iface_desc->endpoint[i].desc;
1512
1513 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1514 in_endpoint = endpoint->bEndpointAddress;
1515
1516 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1517 out_endpoint = endpoint->bEndpointAddress;
1518 }
1519
1520 if (!in_endpoint || !out_endpoint) {
1521 nfc_err(&interface->dev,
1522 "Could not find bulk-in or bulk-out endpoint\n");
1523 rc = -ENODEV;
1524 goto error;
1525 }
1526
1527 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1528 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1529
1530 if (!dev->in_urb || !dev->out_urb) {
1531 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1532 rc = -ENOMEM;
1533 goto error;
1534 }
1535
1536 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1537 usb_rcvbulkpipe(dev->udev, in_endpoint),
1538 NULL, 0, NULL, dev);
1539 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1540 usb_sndbulkpipe(dev->udev, out_endpoint),
1541 NULL, 0, port100_send_complete, dev);
1542 dev->out_urb->transfer_flags = URB_ZERO_PACKET;
1543
1544 dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1545 PORT100_COMM_RF_HEAD_MAX_LEN;
1546 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1547
1548 init_completion(&dev->cmd_cancel_done);
1549 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1550
1551 /* The first thing to do with the Port-100 is to set the command type
1552 * to be used. If supported we use command type 1. 0 otherwise.
1553 */
1554 cmd_type_mask = port100_get_command_type_mask(dev);
1555 if (!cmd_type_mask) {
1556 nfc_err(&interface->dev,
1557 "Could not get supported command types\n");
1558 rc = -ENODEV;
1559 goto error;
1560 }
1561
1562 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1563 dev->cmd_type = PORT100_CMD_TYPE_1;
1564 else
1565 dev->cmd_type = PORT100_CMD_TYPE_0;
1566
1567 rc = port100_set_command_type(dev, dev->cmd_type);
1568 if (rc) {
1569 nfc_err(&interface->dev,
1570 "The device does not support command type %u\n",
1571 dev->cmd_type);
1572 goto error;
1573 }
1574
1575 fw_version = port100_get_firmware_version(dev);
1576 if (!fw_version)
1577 nfc_err(&interface->dev,
1578 "Could not get device firmware version\n");
1579
1580 nfc_info(&interface->dev,
1581 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1582 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1583
1584 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1585 PORT100_PROTOCOLS,
1586 PORT100_CAPABILITIES,
1587 dev->skb_headroom,
1588 dev->skb_tailroom);
1589 if (!dev->nfc_digital_dev) {
1590 nfc_err(&interface->dev,
1591 "Could not allocate nfc_digital_dev\n");
1592 rc = -ENOMEM;
1593 goto error;
1594 }
1595
1596 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1597 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1598
1599 rc = nfc_digital_register_device(dev->nfc_digital_dev);
1600 if (rc) {
1601 nfc_err(&interface->dev,
1602 "Could not register digital device\n");
1603 goto free_nfc_dev;
1604 }
1605
1606 return 0;
1607
1608 free_nfc_dev:
1609 nfc_digital_free_device(dev->nfc_digital_dev);
1610
1611 error:
1612 usb_free_urb(dev->in_urb);
1613 usb_free_urb(dev->out_urb);
1614 usb_put_dev(dev->udev);
1615
1616 return rc;
1617 }
1618
1619 static void port100_disconnect(struct usb_interface *interface)
1620 {
1621 struct port100 *dev;
1622
1623 dev = usb_get_intfdata(interface);
1624 usb_set_intfdata(interface, NULL);
1625
1626 nfc_digital_unregister_device(dev->nfc_digital_dev);
1627 nfc_digital_free_device(dev->nfc_digital_dev);
1628
1629 usb_kill_urb(dev->in_urb);
1630 usb_kill_urb(dev->out_urb);
1631
1632 usb_free_urb(dev->in_urb);
1633 usb_free_urb(dev->out_urb);
1634 usb_put_dev(dev->udev);
1635
1636 kfree(dev->cmd);
1637
1638 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n");
1639 }
1640
1641 static struct usb_driver port100_driver = {
1642 .name = "port100",
1643 .probe = port100_probe,
1644 .disconnect = port100_disconnect,
1645 .id_table = port100_table,
1646 };
1647
1648 module_usb_driver(port100_driver);
1649
1650 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1651 MODULE_VERSION(VERSION);
1652 MODULE_LICENSE("GPL");
Linux with added FPC-III support