Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/nfc/port100.c

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

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