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x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / nfc / port100.c
blob2b2330b235e63a251755bcd23ae4e066cd4aa7db
1 /*
2 * Sony NFC Port-100 Series driver
3 * Copyright (c) 2013, Intel Corporation.
4 *
5 * Partly based/Inspired by Stephen Tiedemann's nfcpy
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 */
17
18 #include <linux/module.h>
19 #include <linux/usb.h>
20 #include <net/nfc/digital.h>
21
22 #define VERSION "0.1"
23
24 #define SONY_VENDOR_ID 0x054c
25 #define RCS380_PRODUCT_ID 0x06c1
26
27 #define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
28 NFC_PROTO_MIFARE_MASK | \
29 NFC_PROTO_FELICA_MASK | \
30 NFC_PROTO_NFC_DEP_MASK | \
31 NFC_PROTO_ISO14443_MASK | \
32 NFC_PROTO_ISO14443_B_MASK)
33
34 #define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
35 NFC_DIGITAL_DRV_CAPS_TG_CRC)
36
37 /* Standard port100 frame definitions */
38 #define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \
39 + 2) /* data[0] CC, data[1] SCC */
40 #define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
41
42 #define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd))
43
44 /*
45 * Max extended frame payload len, excluding CC and SCC
46 * which are already in PORT100_FRAME_HEADER_LEN.
47 */
48 #define PORT100_FRAME_MAX_PAYLOAD_LEN 1001
49
50 #define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
51 Postamble (1) */
52 static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
53 0x00, 0x00, 0xff, 0x00, 0xff, 0x00
54 };
55
56 #define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)])
57 #define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1])
58
59 /* start of frame */
60 #define PORT100_FRAME_SOF 0x00FF
61 #define PORT100_FRAME_EXT 0xFFFF
62 #define PORT100_FRAME_ACK 0x00FF
63
64 /* Port-100 command: in or out */
65 #define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */
66 #define PORT100_FRAME_DIR_OUT 0xD6
67 #define PORT100_FRAME_DIR_IN 0xD7
68
69 /* Port-100 sub-command */
70 #define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */
71
72 #define PORT100_CMD_GET_FIRMWARE_VERSION 0x20
73 #define PORT100_CMD_GET_COMMAND_TYPE 0x28
74 #define PORT100_CMD_SET_COMMAND_TYPE 0x2A
75
76 #define PORT100_CMD_IN_SET_RF 0x00
77 #define PORT100_CMD_IN_SET_PROTOCOL 0x02
78 #define PORT100_CMD_IN_COMM_RF 0x04
79
80 #define PORT100_CMD_TG_SET_RF 0x40
81 #define PORT100_CMD_TG_SET_PROTOCOL 0x42
82 #define PORT100_CMD_TG_SET_RF_OFF 0x46
83 #define PORT100_CMD_TG_COMM_RF 0x48
84
85 #define PORT100_CMD_SWITCH_RF 0x06
86
87 #define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
88
89 #define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
90 ((mask) & (0x01 << (cmd_type)))
91 #define PORT100_CMD_TYPE_0 0
92 #define PORT100_CMD_TYPE_1 1
93
94 #define PORT100_CMD_STATUS_OK 0x00
95 #define PORT100_CMD_STATUS_TIMEOUT 0x80
96
97 #define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
98 #define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02
99
100 struct port100;
101
102 typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
103 struct sk_buff *resp);
104
105 /**
106 * Setting sets structure for in_set_rf command
107 *
108 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
109 * This table contains multiple RF setting sets required for RF
110 * communication.
111 *
112 * @in_*_comm_type: Theses fields set the communication type to be used.
113 */
114 struct port100_in_rf_setting {
115 u8 in_send_set_number;
116 u8 in_send_comm_type;
117 u8 in_recv_set_number;
118 u8 in_recv_comm_type;
119 } __packed;
120
121 #define PORT100_COMM_TYPE_IN_212F 0x01
122 #define PORT100_COMM_TYPE_IN_424F 0x02
123 #define PORT100_COMM_TYPE_IN_106A 0x03
124 #define PORT100_COMM_TYPE_IN_106B 0x07
125
126 static const struct port100_in_rf_setting in_rf_settings[] = {
127 [NFC_DIGITAL_RF_TECH_212F] = {
128 .in_send_set_number = 1,
129 .in_send_comm_type = PORT100_COMM_TYPE_IN_212F,
130 .in_recv_set_number = 15,
131 .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F,
132 },
133 [NFC_DIGITAL_RF_TECH_424F] = {
134 .in_send_set_number = 1,
135 .in_send_comm_type = PORT100_COMM_TYPE_IN_424F,
136 .in_recv_set_number = 15,
137 .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F,
138 },
139 [NFC_DIGITAL_RF_TECH_106A] = {
140 .in_send_set_number = 2,
141 .in_send_comm_type = PORT100_COMM_TYPE_IN_106A,
142 .in_recv_set_number = 15,
143 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A,
144 },
145 [NFC_DIGITAL_RF_TECH_106B] = {
146 .in_send_set_number = 3,
147 .in_send_comm_type = PORT100_COMM_TYPE_IN_106B,
148 .in_recv_set_number = 15,
149 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106B,
150 },
151 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
152 [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
153 };
154
155 /**
156 * Setting sets structure for tg_set_rf command
157 *
158 * @tg_set_number: Represents the entry index in the port-100 RF Base Table.
159 * This table contains multiple RF setting sets required for RF
160 * communication. this field is used for both send and receive
161 * settings.
162 *
163 * @tg_comm_type: Sets the communication type to be used to send and receive
164 * data.
165 */
166 struct port100_tg_rf_setting {
167 u8 tg_set_number;
168 u8 tg_comm_type;
169 } __packed;
170
171 #define PORT100_COMM_TYPE_TG_106A 0x0B
172 #define PORT100_COMM_TYPE_TG_212F 0x0C
173 #define PORT100_COMM_TYPE_TG_424F 0x0D
174
175 static const struct port100_tg_rf_setting tg_rf_settings[] = {
176 [NFC_DIGITAL_RF_TECH_106A] = {
177 .tg_set_number = 8,
178 .tg_comm_type = PORT100_COMM_TYPE_TG_106A,
179 },
180 [NFC_DIGITAL_RF_TECH_212F] = {
181 .tg_set_number = 8,
182 .tg_comm_type = PORT100_COMM_TYPE_TG_212F,
183 },
184 [NFC_DIGITAL_RF_TECH_424F] = {
185 .tg_set_number = 8,
186 .tg_comm_type = PORT100_COMM_TYPE_TG_424F,
187 },
188 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
189 [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
190
191 };
192
193 #define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
194 #define PORT100_IN_PROT_ADD_CRC 0x01
195 #define PORT100_IN_PROT_CHECK_CRC 0x02
196 #define PORT100_IN_PROT_MULTI_CARD 0x03
197 #define PORT100_IN_PROT_ADD_PARITY 0x04
198 #define PORT100_IN_PROT_CHECK_PARITY 0x05
199 #define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06
200 #define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07
201 #define PORT100_IN_PROT_CRYPTO1 0x08
202 #define PORT100_IN_PROT_ADD_SOF 0x09
203 #define PORT100_IN_PROT_CHECK_SOF 0x0A
204 #define PORT100_IN_PROT_ADD_EOF 0x0B
205 #define PORT100_IN_PROT_CHECK_EOF 0x0C
206 #define PORT100_IN_PROT_DEAF_TIME 0x0E
207 #define PORT100_IN_PROT_CRM 0x0F
208 #define PORT100_IN_PROT_CRM_MIN_LEN 0x10
209 #define PORT100_IN_PROT_T1_TAG_FRAME 0x11
210 #define PORT100_IN_PROT_RFCA 0x12
211 #define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
212 #define PORT100_IN_PROT_END 0x14
213
214 #define PORT100_IN_MAX_NUM_PROTOCOLS 19
215
216 #define PORT100_TG_PROT_TU 0x00
217 #define PORT100_TG_PROT_RF_OFF 0x01
218 #define PORT100_TG_PROT_CRM 0x02
219 #define PORT100_TG_PROT_END 0x03
220
221 #define PORT100_TG_MAX_NUM_PROTOCOLS 3
222
223 struct port100_protocol {
224 u8 number;
225 u8 value;
226 } __packed;
227
228 static struct port100_protocol
229 in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
230 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
231 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
232 { PORT100_IN_PROT_ADD_CRC, 0 },
233 { PORT100_IN_PROT_CHECK_CRC, 0 },
234 { PORT100_IN_PROT_MULTI_CARD, 0 },
235 { PORT100_IN_PROT_ADD_PARITY, 0 },
236 { PORT100_IN_PROT_CHECK_PARITY, 1 },
237 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
238 { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 },
239 { PORT100_IN_PROT_CRYPTO1, 0 },
240 { PORT100_IN_PROT_ADD_SOF, 0 },
241 { PORT100_IN_PROT_CHECK_SOF, 0 },
242 { PORT100_IN_PROT_ADD_EOF, 0 },
243 { PORT100_IN_PROT_CHECK_EOF, 0 },
244 { PORT100_IN_PROT_DEAF_TIME, 4 },
245 { PORT100_IN_PROT_CRM, 0 },
246 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
247 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
248 { PORT100_IN_PROT_RFCA, 0 },
249 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
250 { PORT100_IN_PROT_END, 0 },
251 },
252 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
253 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
254 { PORT100_IN_PROT_ADD_CRC, 0 },
255 { PORT100_IN_PROT_CHECK_CRC, 0 },
256 { PORT100_IN_PROT_MULTI_CARD, 0 },
257 { PORT100_IN_PROT_ADD_PARITY, 1 },
258 { PORT100_IN_PROT_CHECK_PARITY, 1 },
259 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
260 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
261 { PORT100_IN_PROT_CRYPTO1, 0 },
262 { PORT100_IN_PROT_ADD_SOF, 0 },
263 { PORT100_IN_PROT_CHECK_SOF, 0 },
264 { PORT100_IN_PROT_ADD_EOF, 0 },
265 { PORT100_IN_PROT_CHECK_EOF, 0 },
266 { PORT100_IN_PROT_DEAF_TIME, 4 },
267 { PORT100_IN_PROT_CRM, 0 },
268 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
269 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
270 { PORT100_IN_PROT_RFCA, 0 },
271 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
272 { PORT100_IN_PROT_END, 0 },
273 },
274 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
275 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
276 { PORT100_IN_PROT_ADD_CRC, 1 },
277 { PORT100_IN_PROT_CHECK_CRC, 1 },
278 { PORT100_IN_PROT_MULTI_CARD, 0 },
279 { PORT100_IN_PROT_ADD_PARITY, 1 },
280 { PORT100_IN_PROT_CHECK_PARITY, 1 },
281 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
282 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
283 { PORT100_IN_PROT_CRYPTO1, 0 },
284 { PORT100_IN_PROT_ADD_SOF, 0 },
285 { PORT100_IN_PROT_CHECK_SOF, 0 },
286 { PORT100_IN_PROT_ADD_EOF, 0 },
287 { PORT100_IN_PROT_CHECK_EOF, 0 },
288 { PORT100_IN_PROT_DEAF_TIME, 4 },
289 { PORT100_IN_PROT_CRM, 0 },
290 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
291 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
292 { PORT100_IN_PROT_RFCA, 0 },
293 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
294 { PORT100_IN_PROT_END, 0 },
295 },
296 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
297 /* nfc_digital_framing_nfca_short */
298 { PORT100_IN_PROT_ADD_CRC, 2 },
299 { PORT100_IN_PROT_CHECK_CRC, 2 },
300 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
301 { PORT100_IN_PROT_T1_TAG_FRAME, 2 },
302 { PORT100_IN_PROT_END, 0 },
303 },
304 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
305 /* nfc_digital_framing_nfca_standard */
306 { PORT100_IN_PROT_ADD_CRC, 1 },
307 { PORT100_IN_PROT_CHECK_CRC, 0 },
308 { PORT100_IN_PROT_END, 0 },
309 },
310 [NFC_DIGITAL_FRAMING_NFCA_T4T] = {
311 /* nfc_digital_framing_nfca_standard_with_crc_a */
312 { PORT100_IN_PROT_END, 0 },
313 },
314 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
315 /* nfc_digital_framing_nfca_standard */
316 { PORT100_IN_PROT_END, 0 },
317 },
318 [NFC_DIGITAL_FRAMING_NFCF] = {
319 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
320 { PORT100_IN_PROT_ADD_CRC, 1 },
321 { PORT100_IN_PROT_CHECK_CRC, 1 },
322 { PORT100_IN_PROT_MULTI_CARD, 0 },
323 { PORT100_IN_PROT_ADD_PARITY, 0 },
324 { PORT100_IN_PROT_CHECK_PARITY, 0 },
325 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
326 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
327 { PORT100_IN_PROT_CRYPTO1, 0 },
328 { PORT100_IN_PROT_ADD_SOF, 0 },
329 { PORT100_IN_PROT_CHECK_SOF, 0 },
330 { PORT100_IN_PROT_ADD_EOF, 0 },
331 { PORT100_IN_PROT_CHECK_EOF, 0 },
332 { PORT100_IN_PROT_DEAF_TIME, 4 },
333 { PORT100_IN_PROT_CRM, 0 },
334 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
335 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
336 { PORT100_IN_PROT_RFCA, 0 },
337 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
338 { PORT100_IN_PROT_END, 0 },
339 },
340 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
341 /* nfc_digital_framing_nfcf */
342 { PORT100_IN_PROT_END, 0 },
343 },
344 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
345 /* nfc_digital_framing_nfcf */
346 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
347 { PORT100_IN_PROT_ADD_CRC, 1 },
348 { PORT100_IN_PROT_CHECK_CRC, 1 },
349 { PORT100_IN_PROT_MULTI_CARD, 0 },
350 { PORT100_IN_PROT_ADD_PARITY, 0 },
351 { PORT100_IN_PROT_CHECK_PARITY, 0 },
352 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
353 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
354 { PORT100_IN_PROT_CRYPTO1, 0 },
355 { PORT100_IN_PROT_ADD_SOF, 0 },
356 { PORT100_IN_PROT_CHECK_SOF, 0 },
357 { PORT100_IN_PROT_ADD_EOF, 0 },
358 { PORT100_IN_PROT_CHECK_EOF, 0 },
359 { PORT100_IN_PROT_DEAF_TIME, 4 },
360 { PORT100_IN_PROT_CRM, 0 },
361 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
362 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
363 { PORT100_IN_PROT_RFCA, 0 },
364 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
365 { PORT100_IN_PROT_END, 0 },
366 },
367 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
368 { PORT100_IN_PROT_END, 0 },
369 },
370 [NFC_DIGITAL_FRAMING_NFCB] = {
371 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 20 },
372 { PORT100_IN_PROT_ADD_CRC, 1 },
373 { PORT100_IN_PROT_CHECK_CRC, 1 },
374 { PORT100_IN_PROT_MULTI_CARD, 0 },
375 { PORT100_IN_PROT_ADD_PARITY, 0 },
376 { PORT100_IN_PROT_CHECK_PARITY, 0 },
377 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
378 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
379 { PORT100_IN_PROT_CRYPTO1, 0 },
380 { PORT100_IN_PROT_ADD_SOF, 1 },
381 { PORT100_IN_PROT_CHECK_SOF, 1 },
382 { PORT100_IN_PROT_ADD_EOF, 1 },
383 { PORT100_IN_PROT_CHECK_EOF, 1 },
384 { PORT100_IN_PROT_DEAF_TIME, 4 },
385 { PORT100_IN_PROT_CRM, 0 },
386 { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
387 { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
388 { PORT100_IN_PROT_RFCA, 0 },
389 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
390 { PORT100_IN_PROT_END, 0 },
391 },
392 [NFC_DIGITAL_FRAMING_NFCB_T4T] = {
393 /* nfc_digital_framing_nfcb */
394 { PORT100_IN_PROT_END, 0 },
395 },
396 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
397 [NFC_DIGITAL_FRAMING_LAST] = {
398 { PORT100_IN_PROT_END, 0 },
399 },
400 };
401
402 static struct port100_protocol
403 tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
404 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
405 { PORT100_TG_PROT_END, 0 },
406 },
407 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
408 { PORT100_TG_PROT_END, 0 },
409 },
410 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
411 { PORT100_TG_PROT_END, 0 },
412 },
413 [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
414 { PORT100_TG_PROT_END, 0 },
415 },
416 [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
417 { PORT100_TG_PROT_END, 0 },
418 },
419 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
420 { PORT100_TG_PROT_TU, 1 },
421 { PORT100_TG_PROT_RF_OFF, 0 },
422 { PORT100_TG_PROT_CRM, 7 },
423 { PORT100_TG_PROT_END, 0 },
424 },
425 [NFC_DIGITAL_FRAMING_NFCF] = {
426 { PORT100_TG_PROT_END, 0 },
427 },
428 [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
429 { PORT100_TG_PROT_END, 0 },
430 },
431 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
432 { PORT100_TG_PROT_TU, 1 },
433 { PORT100_TG_PROT_RF_OFF, 0 },
434 { PORT100_TG_PROT_CRM, 7 },
435 { PORT100_TG_PROT_END, 0 },
436 },
437 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
438 { PORT100_TG_PROT_RF_OFF, 1 },
439 { PORT100_TG_PROT_END, 0 },
440 },
441 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
442 [NFC_DIGITAL_FRAMING_LAST] = {
443 { PORT100_TG_PROT_END, 0 },
444 },
445 };
446
447 struct port100 {
448 struct nfc_digital_dev *nfc_digital_dev;
449
450 int skb_headroom;
451 int skb_tailroom;
452
453 struct usb_device *udev;
454 struct usb_interface *interface;
455
456 struct urb *out_urb;
457 struct urb *in_urb;
458
459 /* This mutex protects the out_urb and avoids to submit a new command
460 * through port100_send_frame_async() while the previous one is being
461 * canceled through port100_abort_cmd().
462 */
463 struct mutex out_urb_lock;
464
465 struct work_struct cmd_complete_work;
466
467 u8 cmd_type;
468
469 /* The digital stack serializes commands to be sent. There is no need
470 * for any queuing/locking mechanism at driver level.
471 */
472 struct port100_cmd *cmd;
473
474 bool cmd_cancel;
475 struct completion cmd_cancel_done;
476 };
477
478 struct port100_cmd {
479 u8 code;
480 int status;
481 struct sk_buff *req;
482 struct sk_buff *resp;
483 int resp_len;
484 port100_send_async_complete_t complete_cb;
485 void *complete_cb_context;
486 };
487
488 struct port100_frame {
489 u8 preamble;
490 __be16 start_frame;
491 __be16 extended_frame;
492 __le16 datalen;
493 u8 datalen_checksum;
494 u8 data[];
495 } __packed;
496
497 struct port100_ack_frame {
498 u8 preamble;
499 __be16 start_frame;
500 __be16 ack_frame;
501 u8 postambule;
502 } __packed;
503
504 struct port100_cb_arg {
505 nfc_digital_cmd_complete_t complete_cb;
506 void *complete_arg;
507 u8 mdaa;
508 };
509
510 struct port100_tg_comm_rf_cmd {
511 __le16 guard_time;
512 __le16 send_timeout;
513 u8 mdaa;
514 u8 nfca_param[6];
515 u8 nfcf_param[18];
516 u8 mf_halted;
517 u8 arae_flag;
518 __le16 recv_timeout;
519 u8 data[];
520 } __packed;
521
522 struct port100_tg_comm_rf_res {
523 u8 comm_type;
524 u8 ar_status;
525 u8 target_activated;
526 __le32 status;
527 u8 data[];
528 } __packed;
529
530 /* The rule: value + checksum = 0 */
531 static inline u8 port100_checksum(u16 value)
532 {
533 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
534 }
535
536 /* The rule: sum(data elements) + checksum = 0 */
537 static u8 port100_data_checksum(u8 *data, int datalen)
538 {
539 u8 sum = 0;
540 int i;
541
542 for (i = 0; i < datalen; i++)
543 sum += data[i];
544
545 return port100_checksum(sum);
546 }
547
548 static void port100_tx_frame_init(void *_frame, u8 cmd_code)
549 {
550 struct port100_frame *frame = _frame;
551
552 frame->preamble = 0;
553 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
554 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
555 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
556 PORT100_FRAME_CMD(frame) = cmd_code;
557 frame->datalen = cpu_to_le16(2);
558 }
559
560 static void port100_tx_frame_finish(void *_frame)
561 {
562 struct port100_frame *frame = _frame;
563
564 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
565
566 PORT100_FRAME_CHECKSUM(frame) =
567 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
568
569 PORT100_FRAME_POSTAMBLE(frame) = 0;
570 }
571
572 static void port100_tx_update_payload_len(void *_frame, int len)
573 {
574 struct port100_frame *frame = _frame;
575
576 frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len);
577 }
578
579 static bool port100_rx_frame_is_valid(void *_frame)
580 {
581 u8 checksum;
582 struct port100_frame *frame = _frame;
583
584 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
585 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
586 return false;
587
588 checksum = port100_checksum(le16_to_cpu(frame->datalen));
589 if (checksum != frame->datalen_checksum)
590 return false;
591
592 checksum = port100_data_checksum(frame->data,
593 le16_to_cpu(frame->datalen));
594 if (checksum != PORT100_FRAME_CHECKSUM(frame))
595 return false;
596
597 return true;
598 }
599
600 static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
601 {
602 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
603 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
604 }
605
606 static inline int port100_rx_frame_size(void *frame)
607 {
608 struct port100_frame *f = frame;
609
610 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
611 PORT100_FRAME_TAIL_LEN;
612 }
613
614 static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
615 {
616 struct port100_frame *f = frame;
617
618 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
619 }
620
621 static void port100_recv_response(struct urb *urb)
622 {
623 struct port100 *dev = urb->context;
624 struct port100_cmd *cmd = dev->cmd;
625 u8 *in_frame;
626
627 cmd->status = urb->status;
628
629 switch (urb->status) {
630 case 0:
631 break; /* success */
632 case -ECONNRESET:
633 case -ENOENT:
634 nfc_err(&dev->interface->dev,
635 "The urb has been canceled (status %d)\n", urb->status);
636 goto sched_wq;
637 case -ESHUTDOWN:
638 default:
639 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
640 urb->status);
641 goto sched_wq;
642 }
643
644 in_frame = dev->in_urb->transfer_buffer;
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
666 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
667 {
668 dev->in_urb->complete = port100_recv_response;
669
670 return usb_submit_urb(dev->in_urb, flags);
671 }
672
673 static void port100_recv_ack(struct urb *urb)
674 {
675 struct port100 *dev = urb->context;
676 struct port100_cmd *cmd = dev->cmd;
677 struct port100_ack_frame *in_frame;
678 int rc;
679
680 cmd->status = urb->status;
681
682 switch (urb->status) {
683 case 0:
684 break; /* success */
685 case -ECONNRESET:
686 case -ENOENT:
687 nfc_err(&dev->interface->dev,
688 "The urb has been stopped (status %d)\n", urb->status);
689 goto sched_wq;
690 case -ESHUTDOWN:
691 default:
692 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
693 urb->status);
694 goto sched_wq;
695 }
696
697 in_frame = dev->in_urb->transfer_buffer;
698
699 if (!port100_rx_frame_is_ack(in_frame)) {
700 nfc_err(&dev->interface->dev, "Received an invalid ack\n");
701 cmd->status = -EIO;
702 goto sched_wq;
703 }
704
705 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
706 if (rc) {
707 nfc_err(&dev->interface->dev,
708 "usb_submit_urb failed with result %d\n", rc);
709 cmd->status = rc;
710 goto sched_wq;
711 }
712
713 return;
714
715 sched_wq:
716 schedule_work(&dev->cmd_complete_work);
717 }
718
719 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
720 {
721 dev->in_urb->complete = port100_recv_ack;
722
723 return usb_submit_urb(dev->in_urb, flags);
724 }
725
726 static int port100_send_ack(struct port100 *dev)
727 {
728 int rc;
729
730 mutex_lock(&dev->out_urb_lock);
731
732 init_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 /* Set the cmd_cancel flag only if the URB has been successfully
741 * submitted. It will be reset by the out URB completion callback
742 * port100_send_complete().
743 */
744 dev->cmd_cancel = !rc;
745
746 mutex_unlock(&dev->out_urb_lock);
747
748 if (!rc)
749 wait_for_completion(&dev->cmd_cancel_done);
750
751 return rc;
752 }
753
754 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
755 struct sk_buff *in, int in_len)
756 {
757 int rc;
758
759 mutex_lock(&dev->out_urb_lock);
760
761 /* A command cancel frame as been sent through dev->out_urb. Don't try
762 * to submit a new one.
763 */
764 if (dev->cmd_cancel) {
765 rc = -EAGAIN;
766 goto exit;
767 }
768
769 dev->out_urb->transfer_buffer = out->data;
770 dev->out_urb->transfer_buffer_length = out->len;
771
772 dev->in_urb->transfer_buffer = in->data;
773 dev->in_urb->transfer_buffer_length = in_len;
774
775 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
776 out->data, out->len, false);
777
778 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
779 if (rc)
780 goto exit;
781
782 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
783 if (rc)
784 usb_unlink_urb(dev->out_urb);
785
786 exit:
787 mutex_unlock(&dev->out_urb_lock);
788
789 return rc;
790 }
791
792 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
793 struct sk_buff *skb)
794 {
795 /* payload is already there, just update datalen */
796 int payload_len = skb->len;
797
798 skb_push(skb, PORT100_FRAME_HEADER_LEN);
799 skb_put(skb, PORT100_FRAME_TAIL_LEN);
800
801 port100_tx_frame_init(skb->data, cmd_code);
802 port100_tx_update_payload_len(skb->data, payload_len);
803 port100_tx_frame_finish(skb->data);
804 }
805
806 static void port100_send_async_complete(struct port100 *dev)
807 {
808 struct port100_cmd *cmd = dev->cmd;
809 int status = cmd->status;
810
811 struct sk_buff *req = cmd->req;
812 struct sk_buff *resp = cmd->resp;
813
814 dev_kfree_skb(req);
815
816 dev->cmd = NULL;
817
818 if (status < 0) {
819 cmd->complete_cb(dev, cmd->complete_cb_context,
820 ERR_PTR(status));
821 dev_kfree_skb(resp);
822 goto done;
823 }
824
825 skb_put(resp, port100_rx_frame_size(resp->data));
826 skb_pull(resp, PORT100_FRAME_HEADER_LEN);
827 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
828
829 cmd->complete_cb(dev, cmd->complete_cb_context, resp);
830
831 done:
832 kfree(cmd);
833 }
834
835 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
836 struct sk_buff *req,
837 port100_send_async_complete_t complete_cb,
838 void *complete_cb_context)
839 {
840 struct port100_cmd *cmd;
841 struct sk_buff *resp;
842 int rc;
843 int resp_len = PORT100_FRAME_HEADER_LEN +
844 PORT100_FRAME_MAX_PAYLOAD_LEN +
845 PORT100_FRAME_TAIL_LEN;
846
847 if (dev->cmd) {
848 nfc_err(&dev->interface->dev,
849 "A command is still in process\n");
850 return -EBUSY;
851 }
852
853 resp = alloc_skb(resp_len, GFP_KERNEL);
854 if (!resp)
855 return -ENOMEM;
856
857 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
858 if (!cmd) {
859 dev_kfree_skb(resp);
860 return -ENOMEM;
861 }
862
863 cmd->code = cmd_code;
864 cmd->req = req;
865 cmd->resp = resp;
866 cmd->resp_len = resp_len;
867 cmd->complete_cb = complete_cb;
868 cmd->complete_cb_context = complete_cb_context;
869
870 port100_build_cmd_frame(dev, cmd_code, req);
871
872 dev->cmd = cmd;
873
874 rc = port100_send_frame_async(dev, req, resp, resp_len);
875 if (rc) {
876 kfree(cmd);
877 dev_kfree_skb(resp);
878 dev->cmd = NULL;
879 }
880
881 return rc;
882 }
883
884 struct port100_sync_cmd_response {
885 struct sk_buff *resp;
886 struct completion done;
887 };
888
889 static void port100_wq_cmd_complete(struct work_struct *work)
890 {
891 struct port100 *dev = container_of(work, struct port100,
892 cmd_complete_work);
893
894 port100_send_async_complete(dev);
895 }
896
897 static void port100_send_sync_complete(struct port100 *dev, void *_arg,
898 struct sk_buff *resp)
899 {
900 struct port100_sync_cmd_response *arg = _arg;
901
902 arg->resp = resp;
903 complete(&arg->done);
904 }
905
906 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
907 struct sk_buff *req)
908 {
909 int rc;
910 struct port100_sync_cmd_response arg;
911
912 init_completion(&arg.done);
913
914 rc = port100_send_cmd_async(dev, cmd_code, req,
915 port100_send_sync_complete, &arg);
916 if (rc) {
917 dev_kfree_skb(req);
918 return ERR_PTR(rc);
919 }
920
921 wait_for_completion(&arg.done);
922
923 return arg.resp;
924 }
925
926 static void port100_send_complete(struct urb *urb)
927 {
928 struct port100 *dev = urb->context;
929
930 if (dev->cmd_cancel) {
931 dev->cmd_cancel = false;
932 complete(&dev->cmd_cancel_done);
933 }
934
935 switch (urb->status) {
936 case 0:
937 break; /* success */
938 case -ECONNRESET:
939 case -ENOENT:
940 nfc_err(&dev->interface->dev,
941 "The urb has been stopped (status %d)\n", urb->status);
942 break;
943 case -ESHUTDOWN:
944 default:
945 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
946 urb->status);
947 }
948 }
949
950 static void port100_abort_cmd(struct nfc_digital_dev *ddev)
951 {
952 struct port100 *dev = nfc_digital_get_drvdata(ddev);
953
954 /* An ack will cancel the last issued command */
955 port100_send_ack(dev);
956
957 /* cancel the urb request */
958 usb_kill_urb(dev->in_urb);
959 }
960
961 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
962 {
963 struct sk_buff *skb;
964
965 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
966 GFP_KERNEL);
967 if (skb)
968 skb_reserve(skb, dev->skb_headroom);
969
970 return skb;
971 }
972
973 static int port100_set_command_type(struct port100 *dev, u8 command_type)
974 {
975 struct sk_buff *skb;
976 struct sk_buff *resp;
977 int rc;
978
979 skb = port100_alloc_skb(dev, 1);
980 if (!skb)
981 return -ENOMEM;
982
983 *skb_put(skb, sizeof(u8)) = command_type;
984
985 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
986 if (IS_ERR(resp))
987 return PTR_ERR(resp);
988
989 rc = resp->data[0];
990
991 dev_kfree_skb(resp);
992
993 return rc;
994 }
995
996 static u64 port100_get_command_type_mask(struct port100 *dev)
997 {
998 struct sk_buff *skb;
999 struct sk_buff *resp;
1000 u64 mask;
1001
1002 skb = port100_alloc_skb(dev, 0);
1003 if (!skb)
1004 return -ENOMEM;
1005
1006 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
1007 if (IS_ERR(resp))
1008 return PTR_ERR(resp);
1009
1010 if (resp->len < 8)
1011 mask = 0;
1012 else
1013 mask = be64_to_cpu(*(__be64 *)resp->data);
1014
1015 dev_kfree_skb(resp);
1016
1017 return mask;
1018 }
1019
1020 static u16 port100_get_firmware_version(struct port100 *dev)
1021 {
1022 struct sk_buff *skb;
1023 struct sk_buff *resp;
1024 u16 fw_ver;
1025
1026 skb = port100_alloc_skb(dev, 0);
1027 if (!skb)
1028 return 0;
1029
1030 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
1031 skb);
1032 if (IS_ERR(resp))
1033 return 0;
1034
1035 fw_ver = le16_to_cpu(*(__le16 *)resp->data);
1036
1037 dev_kfree_skb(resp);
1038
1039 return fw_ver;
1040 }
1041
1042 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
1043 {
1044 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1045 struct sk_buff *skb, *resp;
1046
1047 skb = port100_alloc_skb(dev, 1);
1048 if (!skb)
1049 return -ENOMEM;
1050
1051 *skb_put(skb, 1) = on ? 1 : 0;
1052
1053 /* Cancel the last command if the device is being switched off */
1054 if (!on)
1055 port100_abort_cmd(ddev);
1056
1057 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
1058
1059 if (IS_ERR(resp))
1060 return PTR_ERR(resp);
1061
1062 dev_kfree_skb(resp);
1063
1064 return 0;
1065 }
1066
1067 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1068 {
1069 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1070 struct sk_buff *skb;
1071 struct sk_buff *resp;
1072 int rc;
1073
1074 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1075 return -EINVAL;
1076
1077 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
1078 if (!skb)
1079 return -ENOMEM;
1080
1081 memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)),
1082 &in_rf_settings[rf],
1083 sizeof(struct port100_in_rf_setting));
1084
1085 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
1086
1087 if (IS_ERR(resp))
1088 return PTR_ERR(resp);
1089
1090 rc = resp->data[0];
1091
1092 dev_kfree_skb(resp);
1093
1094 return rc;
1095 }
1096
1097 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
1098 {
1099 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1100 struct port100_protocol *protocols;
1101 struct sk_buff *skb;
1102 struct sk_buff *resp;
1103 int num_protocols;
1104 size_t size;
1105 int rc;
1106
1107 if (param >= NFC_DIGITAL_FRAMING_LAST)
1108 return -EINVAL;
1109
1110 protocols = in_protocols[param];
1111
1112 num_protocols = 0;
1113 while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1114 num_protocols++;
1115
1116 if (!num_protocols)
1117 return 0;
1118
1119 size = sizeof(struct port100_protocol) * num_protocols;
1120
1121 skb = port100_alloc_skb(dev, size);
1122 if (!skb)
1123 return -ENOMEM;
1124
1125 memcpy(skb_put(skb, size), protocols, size);
1126
1127 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1128
1129 if (IS_ERR(resp))
1130 return PTR_ERR(resp);
1131
1132 rc = resp->data[0];
1133
1134 dev_kfree_skb(resp);
1135
1136 return rc;
1137 }
1138
1139 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1140 int param)
1141 {
1142 if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1143 return port100_in_set_rf(ddev, param);
1144
1145 if (type == NFC_DIGITAL_CONFIG_FRAMING)
1146 return port100_in_set_framing(ddev, param);
1147
1148 return -EINVAL;
1149 }
1150
1151 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1152 struct sk_buff *resp)
1153 {
1154 struct port100_cb_arg *cb_arg = arg;
1155 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1156 u32 status;
1157 int rc;
1158
1159 if (IS_ERR(resp)) {
1160 rc = PTR_ERR(resp);
1161 goto exit;
1162 }
1163
1164 if (resp->len < 4) {
1165 nfc_err(&dev->interface->dev,
1166 "Invalid packet length received\n");
1167 rc = -EIO;
1168 goto error;
1169 }
1170
1171 status = le32_to_cpu(*(__le32 *)resp->data);
1172
1173 skb_pull(resp, sizeof(u32));
1174
1175 if (status == PORT100_CMD_STATUS_TIMEOUT) {
1176 rc = -ETIMEDOUT;
1177 goto error;
1178 }
1179
1180 if (status != PORT100_CMD_STATUS_OK) {
1181 nfc_err(&dev->interface->dev,
1182 "in_comm_rf failed with status 0x%08x\n", status);
1183 rc = -EIO;
1184 goto error;
1185 }
1186
1187 /* Remove collision bits byte */
1188 skb_pull(resp, 1);
1189
1190 goto exit;
1191
1192 error:
1193 kfree_skb(resp);
1194 resp = ERR_PTR(rc);
1195
1196 exit:
1197 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1198
1199 kfree(cb_arg);
1200 }
1201
1202 static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1203 struct sk_buff *skb, u16 _timeout,
1204 nfc_digital_cmd_complete_t cb, void *arg)
1205 {
1206 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1207 struct port100_cb_arg *cb_arg;
1208 __le16 timeout;
1209
1210 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1211 if (!cb_arg)
1212 return -ENOMEM;
1213
1214 cb_arg->complete_cb = cb;
1215 cb_arg->complete_arg = arg;
1216
1217 timeout = cpu_to_le16(_timeout * 10);
1218
1219 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1220
1221 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1222 port100_in_comm_rf_complete, cb_arg);
1223 }
1224
1225 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1226 {
1227 struct port100 *dev = nfc_digital_get_drvdata(ddev);
1228 struct sk_buff *skb;
1229 struct sk_buff *resp;
1230 int rc;
1231
1232 if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1233 return -EINVAL;
1234
1235 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1236 if (!skb)
1237 return -ENOMEM;
1238
1239 memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)),
1240 &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 memcpy(skb_put(skb, size), 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, RCS380_PRODUCT_ID), },
1481 { }
1482 };
1483 MODULE_DEVICE_TABLE(usb, port100_table);
1484
1485 static int port100_probe(struct usb_interface *interface,
1486 const struct usb_device_id *id)
1487 {
1488 struct port100 *dev;
1489 int rc;
1490 struct usb_host_interface *iface_desc;
1491 struct usb_endpoint_descriptor *endpoint;
1492 int in_endpoint;
1493 int out_endpoint;
1494 u16 fw_version;
1495 u64 cmd_type_mask;
1496 int i;
1497
1498 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1499 if (!dev)
1500 return -ENOMEM;
1501
1502 mutex_init(&dev->out_urb_lock);
1503 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1504 dev->interface = interface;
1505 usb_set_intfdata(interface, dev);
1506
1507 in_endpoint = out_endpoint = 0;
1508 iface_desc = interface->cur_altsetting;
1509 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1510 endpoint = &iface_desc->endpoint[i].desc;
1511
1512 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1513 in_endpoint = endpoint->bEndpointAddress;
1514
1515 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1516 out_endpoint = endpoint->bEndpointAddress;
1517 }
1518
1519 if (!in_endpoint || !out_endpoint) {
1520 nfc_err(&interface->dev,
1521 "Could not find bulk-in or bulk-out endpoint\n");
1522 rc = -ENODEV;
1523 goto error;
1524 }
1525
1526 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1527 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1528
1529 if (!dev->in_urb || !dev->out_urb) {
1530 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1531 rc = -ENOMEM;
1532 goto error;
1533 }
1534
1535 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1536 usb_rcvbulkpipe(dev->udev, in_endpoint),
1537 NULL, 0, NULL, dev);
1538 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1539 usb_sndbulkpipe(dev->udev, out_endpoint),
1540 NULL, 0, port100_send_complete, dev);
1541
1542 dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1543 PORT100_COMM_RF_HEAD_MAX_LEN;
1544 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1545
1546 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1547
1548 /* The first thing to do with the Port-100 is to set the command type
1549 * to be used. If supported we use command type 1. 0 otherwise.
1550 */
1551 cmd_type_mask = port100_get_command_type_mask(dev);
1552 if (!cmd_type_mask) {
1553 nfc_err(&interface->dev,
1554 "Could not get supported command types\n");
1555 rc = -ENODEV;
1556 goto error;
1557 }
1558
1559 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1560 dev->cmd_type = PORT100_CMD_TYPE_1;
1561 else
1562 dev->cmd_type = PORT100_CMD_TYPE_0;
1563
1564 rc = port100_set_command_type(dev, dev->cmd_type);
1565 if (rc) {
1566 nfc_err(&interface->dev,
1567 "The device does not support command type %u\n",
1568 dev->cmd_type);
1569 goto error;
1570 }
1571
1572 fw_version = port100_get_firmware_version(dev);
1573 if (!fw_version)
1574 nfc_err(&interface->dev,
1575 "Could not get device firmware version\n");
1576
1577 nfc_info(&interface->dev,
1578 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1579 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1580
1581 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1582 PORT100_PROTOCOLS,
1583 PORT100_CAPABILITIES,
1584 dev->skb_headroom,
1585 dev->skb_tailroom);
1586 if (!dev->nfc_digital_dev) {
1587 nfc_err(&interface->dev,
1588 "Could not allocate nfc_digital_dev\n");
1589 rc = -ENOMEM;
1590 goto error;
1591 }
1592
1593 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1594 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1595
1596 rc = nfc_digital_register_device(dev->nfc_digital_dev);
1597 if (rc) {
1598 nfc_err(&interface->dev,
1599 "Could not register digital device\n");
1600 goto free_nfc_dev;
1601 }
1602
1603 return 0;
1604
1605 free_nfc_dev:
1606 nfc_digital_free_device(dev->nfc_digital_dev);
1607
1608 error:
1609 usb_free_urb(dev->in_urb);
1610 usb_free_urb(dev->out_urb);
1611 usb_put_dev(dev->udev);
1612
1613 return rc;
1614 }
1615
1616 static void port100_disconnect(struct usb_interface *interface)
1617 {
1618 struct port100 *dev;
1619
1620 dev = usb_get_intfdata(interface);
1621 usb_set_intfdata(interface, NULL);
1622
1623 nfc_digital_unregister_device(dev->nfc_digital_dev);
1624 nfc_digital_free_device(dev->nfc_digital_dev);
1625
1626 usb_kill_urb(dev->in_urb);
1627 usb_kill_urb(dev->out_urb);
1628
1629 usb_free_urb(dev->in_urb);
1630 usb_free_urb(dev->out_urb);
1631 usb_put_dev(dev->udev);
1632
1633 kfree(dev->cmd);
1634
1635 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n");
1636 }
1637
1638 static struct usb_driver port100_driver = {
1639 .name = "port100",
1640 .probe = port100_probe,
1641 .disconnect = port100_disconnect,
1642 .id_table = port100_table,
1643 };
1644
1645 module_usb_driver(port100_driver);
1646
1647 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1648 MODULE_VERSION(VERSION);
1649 MODULE_LICENSE("GPL");
Linux with added FPC-III support