Version:  2.0.40 2.2.26 2.4.37 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 3.15

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                            NFC_PROTO_ISO14443_MASK)
 32 
 33 #define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
 34                               NFC_DIGITAL_DRV_CAPS_TG_CRC)
 35 
 36 /* Standard port100 frame definitions */
 37 #define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \
 38                                   + 2) /* data[0] CC, data[1] SCC */
 39 #define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
 40 
 41 #define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd))
 42 
 43 /*
 44  * Max extended frame payload len, excluding CC and SCC
 45  * which are already in PORT100_FRAME_HEADER_LEN.
 46  */
 47 #define PORT100_FRAME_MAX_PAYLOAD_LEN 1001
 48 
 49 #define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
 50                                     Postamble (1) */
 51 static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
 52         0x00, 0x00, 0xff, 0x00, 0xff, 0x00
 53 };
 54 
 55 #define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)])
 56 #define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1])
 57 
 58 /* start of frame */
 59 #define PORT100_FRAME_SOF       0x00FF
 60 #define PORT100_FRAME_EXT       0xFFFF
 61 #define PORT100_FRAME_ACK       0x00FF
 62 
 63 /* Port-100 command: in or out */
 64 #define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */
 65 #define PORT100_FRAME_DIR_OUT 0xD6
 66 #define PORT100_FRAME_DIR_IN  0xD7
 67 
 68 /* Port-100 sub-command */
 69 #define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */
 70 
 71 #define PORT100_CMD_GET_FIRMWARE_VERSION 0x20
 72 #define PORT100_CMD_GET_COMMAND_TYPE     0x28
 73 #define PORT100_CMD_SET_COMMAND_TYPE     0x2A
 74 
 75 #define PORT100_CMD_IN_SET_RF       0x00
 76 #define PORT100_CMD_IN_SET_PROTOCOL 0x02
 77 #define PORT100_CMD_IN_COMM_RF      0x04
 78 
 79 #define PORT100_CMD_TG_SET_RF       0x40
 80 #define PORT100_CMD_TG_SET_PROTOCOL 0x42
 81 #define PORT100_CMD_TG_SET_RF_OFF   0x46
 82 #define PORT100_CMD_TG_COMM_RF      0x48
 83 
 84 #define PORT100_CMD_SWITCH_RF       0x06
 85 
 86 #define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
 87 
 88 #define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
 89         ((mask) & (0x01 << (cmd_type)))
 90 #define PORT100_CMD_TYPE_0      0
 91 #define PORT100_CMD_TYPE_1      1
 92 
 93 #define PORT100_CMD_STATUS_OK      0x00
 94 #define PORT100_CMD_STATUS_TIMEOUT 0x80
 95 
 96 #define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
 97 #define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK      0x02
 98 
 99 struct port100;
100 
101 typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
102                                               struct sk_buff *resp);
103 
104 /**
105  * Setting sets structure for in_set_rf command
106  *
107  * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
108  *              This table contains multiple RF setting sets required for RF
109  *              communication.
110  *
111  * @in_*_comm_type: Theses fields set the communication type to be used.
112  */
113 struct port100_in_rf_setting {
114         u8 in_send_set_number;
115         u8 in_send_comm_type;
116         u8 in_recv_set_number;
117         u8 in_recv_comm_type;
118 } __packed;
119 
120 #define PORT100_COMM_TYPE_IN_212F 0x01
121 #define PORT100_COMM_TYPE_IN_424F 0x02
122 #define PORT100_COMM_TYPE_IN_106A 0x03
123 
124 static const struct port100_in_rf_setting in_rf_settings[] = {
125         [NFC_DIGITAL_RF_TECH_212F] = {
126                 .in_send_set_number = 1,
127                 .in_send_comm_type  = PORT100_COMM_TYPE_IN_212F,
128                 .in_recv_set_number = 15,
129                 .in_recv_comm_type  = PORT100_COMM_TYPE_IN_212F,
130         },
131         [NFC_DIGITAL_RF_TECH_424F] = {
132                 .in_send_set_number = 1,
133                 .in_send_comm_type  = PORT100_COMM_TYPE_IN_424F,
134                 .in_recv_set_number = 15,
135                 .in_recv_comm_type  = PORT100_COMM_TYPE_IN_424F,
136         },
137         [NFC_DIGITAL_RF_TECH_106A] = {
138                 .in_send_set_number = 2,
139                 .in_send_comm_type  = PORT100_COMM_TYPE_IN_106A,
140                 .in_recv_set_number = 15,
141                 .in_recv_comm_type  = PORT100_COMM_TYPE_IN_106A,
142         },
143         /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
144         [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
145 };
146 
147 /**
148  * Setting sets structure for tg_set_rf command
149  *
150  * @tg_set_number: Represents the entry index in the port-100 RF Base Table.
151  *                 This table contains multiple RF setting sets required for RF
152  *                 communication. this field is used for both send and receive
153  *                 settings.
154  *
155  * @tg_comm_type: Sets the communication type to be used to send and receive
156  *                data.
157  */
158 struct port100_tg_rf_setting {
159         u8 tg_set_number;
160         u8 tg_comm_type;
161 } __packed;
162 
163 #define PORT100_COMM_TYPE_TG_106A 0x0B
164 #define PORT100_COMM_TYPE_TG_212F 0x0C
165 #define PORT100_COMM_TYPE_TG_424F 0x0D
166 
167 static const struct port100_tg_rf_setting tg_rf_settings[] = {
168         [NFC_DIGITAL_RF_TECH_106A] = {
169                 .tg_set_number = 8,
170                 .tg_comm_type = PORT100_COMM_TYPE_TG_106A,
171         },
172         [NFC_DIGITAL_RF_TECH_212F] = {
173                 .tg_set_number = 8,
174                 .tg_comm_type = PORT100_COMM_TYPE_TG_212F,
175         },
176         [NFC_DIGITAL_RF_TECH_424F] = {
177                 .tg_set_number = 8,
178                 .tg_comm_type = PORT100_COMM_TYPE_TG_424F,
179         },
180         /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
181         [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
182 
183 };
184 
185 #define PORT100_IN_PROT_INITIAL_GUARD_TIME      0x00
186 #define PORT100_IN_PROT_ADD_CRC                 0x01
187 #define PORT100_IN_PROT_CHECK_CRC               0x02
188 #define PORT100_IN_PROT_MULTI_CARD              0x03
189 #define PORT100_IN_PROT_ADD_PARITY              0x04
190 #define PORT100_IN_PROT_CHECK_PARITY            0x05
191 #define PORT100_IN_PROT_BITWISE_AC_RECV_MODE    0x06
192 #define PORT100_IN_PROT_VALID_BIT_NUMBER        0x07
193 #define PORT100_IN_PROT_CRYPTO1                 0x08
194 #define PORT100_IN_PROT_ADD_SOF                 0x09
195 #define PORT100_IN_PROT_CHECK_SOF               0x0A
196 #define PORT100_IN_PROT_ADD_EOF                 0x0B
197 #define PORT100_IN_PROT_CHECK_EOF               0x0C
198 #define PORT100_IN_PROT_DEAF_TIME               0x0E
199 #define PORT100_IN_PROT_CRM                     0x0F
200 #define PORT100_IN_PROT_CRM_MIN_LEN             0x10
201 #define PORT100_IN_PROT_T1_TAG_FRAME            0x11
202 #define PORT100_IN_PROT_RFCA                    0x12
203 #define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
204 #define PORT100_IN_PROT_END                     0x14
205 
206 #define PORT100_IN_MAX_NUM_PROTOCOLS            19
207 
208 #define PORT100_TG_PROT_TU           0x00
209 #define PORT100_TG_PROT_RF_OFF       0x01
210 #define PORT100_TG_PROT_CRM          0x02
211 #define PORT100_TG_PROT_END          0x03
212 
213 #define PORT100_TG_MAX_NUM_PROTOCOLS 3
214 
215 struct port100_protocol {
216         u8 number;
217         u8 value;
218 } __packed;
219 
220 static struct port100_protocol
221 in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
222         [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
223                 { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
224                 { PORT100_IN_PROT_ADD_CRC,                 0 },
225                 { PORT100_IN_PROT_CHECK_CRC,               0 },
226                 { PORT100_IN_PROT_MULTI_CARD,              0 },
227                 { PORT100_IN_PROT_ADD_PARITY,              0 },
228                 { PORT100_IN_PROT_CHECK_PARITY,            1 },
229                 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
230                 { PORT100_IN_PROT_VALID_BIT_NUMBER,        7 },
231                 { PORT100_IN_PROT_CRYPTO1,                 0 },
232                 { PORT100_IN_PROT_ADD_SOF,                 0 },
233                 { PORT100_IN_PROT_CHECK_SOF,               0 },
234                 { PORT100_IN_PROT_ADD_EOF,                 0 },
235                 { PORT100_IN_PROT_CHECK_EOF,               0 },
236                 { PORT100_IN_PROT_DEAF_TIME,               4 },
237                 { PORT100_IN_PROT_CRM,                     0 },
238                 { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
239                 { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
240                 { PORT100_IN_PROT_RFCA,                    0 },
241                 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
242                 { PORT100_IN_PROT_END,                     0 },
243         },
244         [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
245                 { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
246                 { PORT100_IN_PROT_ADD_CRC,                 0 },
247                 { PORT100_IN_PROT_CHECK_CRC,               0 },
248                 { PORT100_IN_PROT_MULTI_CARD,              0 },
249                 { PORT100_IN_PROT_ADD_PARITY,              1 },
250                 { PORT100_IN_PROT_CHECK_PARITY,            1 },
251                 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
252                 { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
253                 { PORT100_IN_PROT_CRYPTO1,                 0 },
254                 { PORT100_IN_PROT_ADD_SOF,                 0 },
255                 { PORT100_IN_PROT_CHECK_SOF,               0 },
256                 { PORT100_IN_PROT_ADD_EOF,                 0 },
257                 { PORT100_IN_PROT_CHECK_EOF,               0 },
258                 { PORT100_IN_PROT_DEAF_TIME,               4 },
259                 { PORT100_IN_PROT_CRM,                     0 },
260                 { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
261                 { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
262                 { PORT100_IN_PROT_RFCA,                    0 },
263                 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
264                 { PORT100_IN_PROT_END,                     0 },
265         },
266         [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
267                 { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
268                 { PORT100_IN_PROT_ADD_CRC,                 1 },
269                 { PORT100_IN_PROT_CHECK_CRC,               1 },
270                 { PORT100_IN_PROT_MULTI_CARD,              0 },
271                 { PORT100_IN_PROT_ADD_PARITY,              1 },
272                 { PORT100_IN_PROT_CHECK_PARITY,            1 },
273                 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
274                 { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
275                 { PORT100_IN_PROT_CRYPTO1,                 0 },
276                 { PORT100_IN_PROT_ADD_SOF,                 0 },
277                 { PORT100_IN_PROT_CHECK_SOF,               0 },
278                 { PORT100_IN_PROT_ADD_EOF,                 0 },
279                 { PORT100_IN_PROT_CHECK_EOF,               0 },
280                 { PORT100_IN_PROT_DEAF_TIME,               4 },
281                 { PORT100_IN_PROT_CRM,                     0 },
282                 { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
283                 { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
284                 { PORT100_IN_PROT_RFCA,                    0 },
285                 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
286                 { PORT100_IN_PROT_END,                     0 },
287         },
288         [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
289                 /* nfc_digital_framing_nfca_short */
290                 { PORT100_IN_PROT_ADD_CRC,          2 },
291                 { PORT100_IN_PROT_CHECK_CRC,        2 },
292                 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
293                 { PORT100_IN_PROT_T1_TAG_FRAME,     2 },
294                 { PORT100_IN_PROT_END,              0 },
295         },
296         [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
297                 /* nfc_digital_framing_nfca_standard */
298                 { PORT100_IN_PROT_ADD_CRC,   1 },
299                 { PORT100_IN_PROT_CHECK_CRC, 0 },
300                 { PORT100_IN_PROT_END,       0 },
301         },
302         [NFC_DIGITAL_FRAMING_NFCA_T4T] = {
303                 /* nfc_digital_framing_nfca_standard_with_crc_a */
304                 { PORT100_IN_PROT_END,       0 },
305         },
306         [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
307                 /* nfc_digital_framing_nfca_standard */
308                 { PORT100_IN_PROT_END, 0 },
309         },
310         [NFC_DIGITAL_FRAMING_NFCF] = {
311                 { PORT100_IN_PROT_INITIAL_GUARD_TIME,     18 },
312                 { PORT100_IN_PROT_ADD_CRC,                 1 },
313                 { PORT100_IN_PROT_CHECK_CRC,               1 },
314                 { PORT100_IN_PROT_MULTI_CARD,              0 },
315                 { PORT100_IN_PROT_ADD_PARITY,              0 },
316                 { PORT100_IN_PROT_CHECK_PARITY,            0 },
317                 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
318                 { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
319                 { PORT100_IN_PROT_CRYPTO1,                 0 },
320                 { PORT100_IN_PROT_ADD_SOF,                 0 },
321                 { PORT100_IN_PROT_CHECK_SOF,               0 },
322                 { PORT100_IN_PROT_ADD_EOF,                 0 },
323                 { PORT100_IN_PROT_CHECK_EOF,               0 },
324                 { PORT100_IN_PROT_DEAF_TIME,               4 },
325                 { PORT100_IN_PROT_CRM,                     0 },
326                 { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
327                 { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
328                 { PORT100_IN_PROT_RFCA,                    0 },
329                 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
330                 { PORT100_IN_PROT_END,                     0 },
331         },
332         [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
333                 /* nfc_digital_framing_nfcf */
334                 { PORT100_IN_PROT_END, 0 },
335         },
336         [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
337                 /* nfc_digital_framing_nfcf */
338                 { PORT100_IN_PROT_END, 0 },
339         },
340         [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
341                 { PORT100_IN_PROT_END, 0 },
342         },
343         /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
344         [NFC_DIGITAL_FRAMING_LAST] = {
345                 { PORT100_IN_PROT_END, 0 },
346         },
347 };
348 
349 static struct port100_protocol
350 tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
351         [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
352                 { PORT100_TG_PROT_END, 0 },
353         },
354         [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
355                 { PORT100_TG_PROT_END, 0 },
356         },
357         [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
358                 { PORT100_TG_PROT_END, 0 },
359         },
360         [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
361                 { PORT100_TG_PROT_END, 0 },
362         },
363         [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
364                 { PORT100_TG_PROT_END, 0 },
365         },
366         [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
367                 { PORT100_TG_PROT_TU,     1 },
368                 { PORT100_TG_PROT_RF_OFF, 0 },
369                 { PORT100_TG_PROT_CRM,    7 },
370                 { PORT100_TG_PROT_END,    0 },
371         },
372         [NFC_DIGITAL_FRAMING_NFCF] = {
373                 { PORT100_TG_PROT_END, 0 },
374         },
375         [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
376                 { PORT100_TG_PROT_END, 0 },
377         },
378         [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
379                 { PORT100_TG_PROT_TU,     1 },
380                 { PORT100_TG_PROT_RF_OFF, 0 },
381                 { PORT100_TG_PROT_CRM,    7 },
382                 { PORT100_TG_PROT_END,    0 },
383         },
384         [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
385                 { PORT100_TG_PROT_RF_OFF, 1 },
386                 { PORT100_TG_PROT_END,    0 },
387         },
388         /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
389         [NFC_DIGITAL_FRAMING_LAST] = {
390                 { PORT100_TG_PROT_END,    0 },
391         },
392 };
393 
394 struct port100 {
395         struct nfc_digital_dev *nfc_digital_dev;
396 
397         int skb_headroom;
398         int skb_tailroom;
399 
400         struct usb_device *udev;
401         struct usb_interface *interface;
402 
403         struct urb *out_urb;
404         struct urb *in_urb;
405 
406         struct work_struct cmd_complete_work;
407 
408         u8 cmd_type;
409 
410         /* The digital stack serializes commands to be sent. There is no need
411          * for any queuing/locking mechanism at driver level.
412          */
413         struct port100_cmd *cmd;
414 };
415 
416 struct port100_cmd {
417         u8 code;
418         int status;
419         struct sk_buff *req;
420         struct sk_buff *resp;
421         int resp_len;
422         port100_send_async_complete_t  complete_cb;
423         void *complete_cb_context;
424 };
425 
426 struct port100_frame {
427         u8 preamble;
428         __be16 start_frame;
429         __be16 extended_frame;
430         __le16 datalen;
431         u8 datalen_checksum;
432         u8 data[];
433 } __packed;
434 
435 struct port100_ack_frame {
436         u8 preamble;
437         __be16 start_frame;
438         __be16 ack_frame;
439         u8 postambule;
440 } __packed;
441 
442 struct port100_cb_arg {
443         nfc_digital_cmd_complete_t complete_cb;
444         void *complete_arg;
445         u8 mdaa;
446 };
447 
448 struct port100_tg_comm_rf_cmd {
449         __le16 guard_time;
450         __le16 send_timeout;
451         u8 mdaa;
452         u8 nfca_param[6];
453         u8 nfcf_param[18];
454         u8 mf_halted;
455         u8 arae_flag;
456         __le16 recv_timeout;
457         u8 data[];
458 } __packed;
459 
460 struct port100_tg_comm_rf_res {
461         u8 comm_type;
462         u8 ar_status;
463         u8 target_activated;
464         __le32 status;
465         u8 data[];
466 } __packed;
467 
468 /* The rule: value + checksum = 0 */
469 static inline u8 port100_checksum(u16 value)
470 {
471         return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
472 }
473 
474 /* The rule: sum(data elements) + checksum = 0 */
475 static u8 port100_data_checksum(u8 *data, int datalen)
476 {
477         u8 sum = 0;
478         int i;
479 
480         for (i = 0; i < datalen; i++)
481                 sum += data[i];
482 
483         return port100_checksum(sum);
484 }
485 
486 static void port100_tx_frame_init(void *_frame, u8 cmd_code)
487 {
488         struct port100_frame *frame = _frame;
489 
490         frame->preamble = 0;
491         frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
492         frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
493         PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
494         PORT100_FRAME_CMD(frame) = cmd_code;
495         frame->datalen = cpu_to_le16(2);
496 }
497 
498 static void port100_tx_frame_finish(void *_frame)
499 {
500         struct port100_frame *frame = _frame;
501 
502         frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
503 
504         PORT100_FRAME_CHECKSUM(frame) =
505                 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
506 
507         PORT100_FRAME_POSTAMBLE(frame) = 0;
508 }
509 
510 static void port100_tx_update_payload_len(void *_frame, int len)
511 {
512         struct port100_frame *frame = _frame;
513 
514         frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len);
515 }
516 
517 static bool port100_rx_frame_is_valid(void *_frame)
518 {
519         u8 checksum;
520         struct port100_frame *frame = _frame;
521 
522         if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
523             frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
524                 return false;
525 
526         checksum = port100_checksum(le16_to_cpu(frame->datalen));
527         if (checksum != frame->datalen_checksum)
528                 return false;
529 
530         checksum = port100_data_checksum(frame->data,
531                                          le16_to_cpu(frame->datalen));
532         if (checksum != PORT100_FRAME_CHECKSUM(frame))
533                 return false;
534 
535         return true;
536 }
537 
538 static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
539 {
540         return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
541                 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
542 }
543 
544 static inline int port100_rx_frame_size(void *frame)
545 {
546         struct port100_frame *f = frame;
547 
548         return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
549                PORT100_FRAME_TAIL_LEN;
550 }
551 
552 static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
553 {
554         struct port100_frame *f = frame;
555 
556         return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
557 }
558 
559 static void port100_recv_response(struct urb *urb)
560 {
561         struct port100 *dev = urb->context;
562         struct port100_cmd *cmd = dev->cmd;
563         u8 *in_frame;
564 
565         cmd->status = urb->status;
566 
567         switch (urb->status) {
568         case 0:
569                 break; /* success */
570         case -ECONNRESET:
571         case -ENOENT:
572                 nfc_err(&dev->interface->dev,
573                         "The urb has been canceled (status %d)", urb->status);
574                 goto sched_wq;
575         case -ESHUTDOWN:
576         default:
577                 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
578                         urb->status);
579                 goto sched_wq;
580         }
581 
582         in_frame = dev->in_urb->transfer_buffer;
583 
584         if (!port100_rx_frame_is_valid(in_frame)) {
585                 nfc_err(&dev->interface->dev, "Received an invalid frame");
586                 cmd->status = -EIO;
587                 goto sched_wq;
588         }
589 
590         print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
591                              port100_rx_frame_size(in_frame), false);
592 
593         if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
594                 nfc_err(&dev->interface->dev,
595                         "It's not the response to the last command");
596                 cmd->status = -EIO;
597                 goto sched_wq;
598         }
599 
600 sched_wq:
601         schedule_work(&dev->cmd_complete_work);
602 }
603 
604 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
605 {
606         dev->in_urb->complete = port100_recv_response;
607 
608         return usb_submit_urb(dev->in_urb, flags);
609 }
610 
611 static void port100_recv_ack(struct urb *urb)
612 {
613         struct port100 *dev = urb->context;
614         struct port100_cmd *cmd = dev->cmd;
615         struct port100_ack_frame *in_frame;
616         int rc;
617 
618         cmd->status = urb->status;
619 
620         switch (urb->status) {
621         case 0:
622                 break; /* success */
623         case -ECONNRESET:
624         case -ENOENT:
625                 nfc_err(&dev->interface->dev,
626                         "The urb has been stopped (status %d)", urb->status);
627                 goto sched_wq;
628         case -ESHUTDOWN:
629         default:
630                 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
631                         urb->status);
632                 goto sched_wq;
633         }
634 
635         in_frame = dev->in_urb->transfer_buffer;
636 
637         if (!port100_rx_frame_is_ack(in_frame)) {
638                 nfc_err(&dev->interface->dev, "Received an invalid ack");
639                 cmd->status = -EIO;
640                 goto sched_wq;
641         }
642 
643         rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
644         if (rc) {
645                 nfc_err(&dev->interface->dev,
646                         "usb_submit_urb failed with result %d", rc);
647                 cmd->status = rc;
648                 goto sched_wq;
649         }
650 
651         return;
652 
653 sched_wq:
654         schedule_work(&dev->cmd_complete_work);
655 }
656 
657 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
658 {
659         dev->in_urb->complete = port100_recv_ack;
660 
661         return usb_submit_urb(dev->in_urb, flags);
662 }
663 
664 static int port100_send_ack(struct port100 *dev)
665 {
666         int rc;
667 
668         dev->out_urb->transfer_buffer = ack_frame;
669         dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
670         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
671 
672         return rc;
673 }
674 
675 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
676                                     struct sk_buff *in, int in_len)
677 {
678         int rc;
679 
680         dev->out_urb->transfer_buffer = out->data;
681         dev->out_urb->transfer_buffer_length = out->len;
682 
683         dev->in_urb->transfer_buffer = in->data;
684         dev->in_urb->transfer_buffer_length = in_len;
685 
686         print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
687                              out->data, out->len, false);
688 
689         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
690         if (rc)
691                 return rc;
692 
693         rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
694         if (rc)
695                 goto error;
696 
697         return 0;
698 
699 error:
700         usb_unlink_urb(dev->out_urb);
701         return rc;
702 }
703 
704 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
705                                     struct sk_buff *skb)
706 {
707         /* payload is already there, just update datalen */
708         int payload_len = skb->len;
709 
710         skb_push(skb, PORT100_FRAME_HEADER_LEN);
711         skb_put(skb, PORT100_FRAME_TAIL_LEN);
712 
713         port100_tx_frame_init(skb->data, cmd_code);
714         port100_tx_update_payload_len(skb->data, payload_len);
715         port100_tx_frame_finish(skb->data);
716 }
717 
718 static void port100_send_async_complete(struct port100 *dev)
719 {
720         struct port100_cmd *cmd = dev->cmd;
721         int status = cmd->status;
722 
723         struct sk_buff *req = cmd->req;
724         struct sk_buff *resp = cmd->resp;
725 
726         dev_kfree_skb(req);
727 
728         dev->cmd = NULL;
729 
730         if (status < 0) {
731                 cmd->complete_cb(dev, cmd->complete_cb_context,
732                                  ERR_PTR(status));
733                 dev_kfree_skb(resp);
734                 goto done;
735         }
736 
737         skb_put(resp, port100_rx_frame_size(resp->data));
738         skb_pull(resp, PORT100_FRAME_HEADER_LEN);
739         skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
740 
741         cmd->complete_cb(dev, cmd->complete_cb_context, resp);
742 
743 done:
744         kfree(cmd);
745 }
746 
747 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
748                                 struct sk_buff *req,
749                                 port100_send_async_complete_t complete_cb,
750                                 void *complete_cb_context)
751 {
752         struct port100_cmd *cmd;
753         struct sk_buff *resp;
754         int rc;
755         int  resp_len = PORT100_FRAME_HEADER_LEN +
756                         PORT100_FRAME_MAX_PAYLOAD_LEN +
757                         PORT100_FRAME_TAIL_LEN;
758 
759         resp = alloc_skb(resp_len, GFP_KERNEL);
760         if (!resp)
761                 return -ENOMEM;
762 
763         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
764         if (!cmd) {
765                 dev_kfree_skb(resp);
766                 return -ENOMEM;
767         }
768 
769         cmd->code = cmd_code;
770         cmd->req = req;
771         cmd->resp = resp;
772         cmd->resp_len = resp_len;
773         cmd->complete_cb = complete_cb;
774         cmd->complete_cb_context = complete_cb_context;
775 
776         port100_build_cmd_frame(dev, cmd_code, req);
777 
778         dev->cmd = cmd;
779 
780         rc = port100_send_frame_async(dev, req, resp, resp_len);
781         if (rc) {
782                 kfree(cmd);
783                 dev_kfree_skb(resp);
784                 dev->cmd = NULL;
785         }
786 
787         return rc;
788 }
789 
790 struct port100_sync_cmd_response {
791         struct sk_buff *resp;
792         struct completion done;
793 };
794 
795 static void port100_wq_cmd_complete(struct work_struct *work)
796 {
797         struct port100 *dev = container_of(work, struct port100,
798                                            cmd_complete_work);
799 
800         port100_send_async_complete(dev);
801 }
802 
803 static void port100_send_sync_complete(struct port100 *dev, void *_arg,
804                                       struct sk_buff *resp)
805 {
806         struct port100_sync_cmd_response *arg = _arg;
807 
808         arg->resp = resp;
809         complete(&arg->done);
810 }
811 
812 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
813                                              struct sk_buff *req)
814 {
815         int rc;
816         struct port100_sync_cmd_response arg;
817 
818         init_completion(&arg.done);
819 
820         rc = port100_send_cmd_async(dev, cmd_code, req,
821                                     port100_send_sync_complete, &arg);
822         if (rc) {
823                 dev_kfree_skb(req);
824                 return ERR_PTR(rc);
825         }
826 
827         wait_for_completion(&arg.done);
828 
829         return arg.resp;
830 }
831 
832 static void port100_send_complete(struct urb *urb)
833 {
834         struct port100 *dev = urb->context;
835 
836         switch (urb->status) {
837         case 0:
838                 break; /* success */
839         case -ECONNRESET:
840         case -ENOENT:
841                 nfc_err(&dev->interface->dev,
842                         "The urb has been stopped (status %d)", urb->status);
843                 break;
844         case -ESHUTDOWN:
845         default:
846                 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
847                         urb->status);
848         }
849 }
850 
851 static void port100_abort_cmd(struct nfc_digital_dev *ddev)
852 {
853         struct port100 *dev = nfc_digital_get_drvdata(ddev);
854 
855         /* An ack will cancel the last issued command */
856         port100_send_ack(dev);
857 
858         /* cancel the urb request */
859         usb_kill_urb(dev->in_urb);
860 }
861 
862 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
863 {
864         struct sk_buff *skb;
865 
866         skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
867                         GFP_KERNEL);
868         if (skb)
869                 skb_reserve(skb, dev->skb_headroom);
870 
871         return skb;
872 }
873 
874 static int port100_set_command_type(struct port100 *dev, u8 command_type)
875 {
876         struct sk_buff *skb;
877         struct sk_buff *resp;
878         int rc;
879 
880         skb = port100_alloc_skb(dev, 1);
881         if (!skb)
882                 return -ENOMEM;
883 
884         *skb_put(skb, sizeof(u8)) = command_type;
885 
886         resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
887         if (IS_ERR(resp))
888                 return PTR_ERR(resp);
889 
890         rc = resp->data[0];
891 
892         dev_kfree_skb(resp);
893 
894         return rc;
895 }
896 
897 static u64 port100_get_command_type_mask(struct port100 *dev)
898 {
899         struct sk_buff *skb;
900         struct sk_buff *resp;
901         u64 mask;
902 
903         skb = port100_alloc_skb(dev, 0);
904         if (!skb)
905                 return -ENOMEM;
906 
907         resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
908         if (IS_ERR(resp))
909                 return PTR_ERR(resp);
910 
911         if (resp->len < 8)
912                 mask = 0;
913         else
914                 mask = be64_to_cpu(*(__be64 *)resp->data);
915 
916         dev_kfree_skb(resp);
917 
918         return mask;
919 }
920 
921 static u16 port100_get_firmware_version(struct port100 *dev)
922 {
923         struct sk_buff *skb;
924         struct sk_buff *resp;
925         u16 fw_ver;
926 
927         skb = port100_alloc_skb(dev, 0);
928         if (!skb)
929                 return 0;
930 
931         resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
932                                      skb);
933         if (IS_ERR(resp))
934                 return 0;
935 
936         fw_ver = le16_to_cpu(*(__le16 *)resp->data);
937 
938         dev_kfree_skb(resp);
939 
940         return fw_ver;
941 }
942 
943 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
944 {
945         struct port100 *dev = nfc_digital_get_drvdata(ddev);
946         struct sk_buff *skb, *resp;
947 
948         skb = port100_alloc_skb(dev, 1);
949         if (!skb)
950                 return -ENOMEM;
951 
952         *skb_put(skb, 1) = on ? 1 : 0;
953 
954         resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
955 
956         if (IS_ERR(resp))
957                 return PTR_ERR(resp);
958 
959         dev_kfree_skb(resp);
960 
961         return 0;
962 }
963 
964 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
965 {
966         struct port100 *dev = nfc_digital_get_drvdata(ddev);
967         struct sk_buff *skb;
968         struct sk_buff *resp;
969         int rc;
970 
971         if (rf >= NFC_DIGITAL_RF_TECH_LAST)
972                 return -EINVAL;
973 
974         skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
975         if (!skb)
976                 return -ENOMEM;
977 
978         memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)),
979                &in_rf_settings[rf],
980                sizeof(struct port100_in_rf_setting));
981 
982         resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
983 
984         if (IS_ERR(resp))
985                 return PTR_ERR(resp);
986 
987         rc = resp->data[0];
988 
989         dev_kfree_skb(resp);
990 
991         return rc;
992 }
993 
994 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
995 {
996         struct port100 *dev = nfc_digital_get_drvdata(ddev);
997         struct port100_protocol *protocols;
998         struct sk_buff *skb;
999         struct sk_buff *resp;
1000         int num_protocols;
1001         size_t size;
1002         int rc;
1003 
1004         if (param >= NFC_DIGITAL_FRAMING_LAST)
1005                 return -EINVAL;
1006 
1007         protocols = in_protocols[param];
1008 
1009         num_protocols = 0;
1010         while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1011                 num_protocols++;
1012 
1013         if (!num_protocols)
1014                 return 0;
1015 
1016         size = sizeof(struct port100_protocol) * num_protocols;
1017 
1018         skb = port100_alloc_skb(dev, size);
1019         if (!skb)
1020                 return -ENOMEM;
1021 
1022         memcpy(skb_put(skb, size), protocols, size);
1023 
1024         resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1025 
1026         if (IS_ERR(resp))
1027                 return PTR_ERR(resp);
1028 
1029         rc = resp->data[0];
1030 
1031         dev_kfree_skb(resp);
1032 
1033         return rc;
1034 }
1035 
1036 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1037                                    int param)
1038 {
1039         if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1040                 return port100_in_set_rf(ddev, param);
1041 
1042         if (type == NFC_DIGITAL_CONFIG_FRAMING)
1043                 return port100_in_set_framing(ddev, param);
1044 
1045         return -EINVAL;
1046 }
1047 
1048 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1049                                        struct sk_buff *resp)
1050 {
1051         struct port100_cb_arg *cb_arg = arg;
1052         nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1053         u32 status;
1054         int rc;
1055 
1056         if (IS_ERR(resp)) {
1057                 rc =  PTR_ERR(resp);
1058                 goto exit;
1059         }
1060 
1061         if (resp->len < 4) {
1062                 nfc_err(&dev->interface->dev,
1063                         "Invalid packet length received.\n");
1064                 rc = -EIO;
1065                 goto error;
1066         }
1067 
1068         status = le32_to_cpu(*(__le32 *)resp->data);
1069 
1070         skb_pull(resp, sizeof(u32));
1071 
1072         if (status == PORT100_CMD_STATUS_TIMEOUT) {
1073                 rc = -ETIMEDOUT;
1074                 goto error;
1075         }
1076 
1077         if (status != PORT100_CMD_STATUS_OK) {
1078                 nfc_err(&dev->interface->dev,
1079                         "in_comm_rf failed with status 0x%08x\n", status);
1080                 rc = -EIO;
1081                 goto error;
1082         }
1083 
1084         /* Remove collision bits byte */
1085         skb_pull(resp, 1);
1086 
1087         goto exit;
1088 
1089 error:
1090         kfree_skb(resp);
1091         resp = ERR_PTR(rc);
1092 
1093 exit:
1094         cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1095 
1096         kfree(cb_arg);
1097 }
1098 
1099 static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1100                                struct sk_buff *skb, u16 _timeout,
1101                                nfc_digital_cmd_complete_t cb, void *arg)
1102 {
1103         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1104         struct port100_cb_arg *cb_arg;
1105         __le16 timeout;
1106 
1107         cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1108         if (!cb_arg)
1109                 return -ENOMEM;
1110 
1111         cb_arg->complete_cb = cb;
1112         cb_arg->complete_arg = arg;
1113 
1114         timeout = cpu_to_le16(_timeout * 10);
1115 
1116         memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1117 
1118         return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1119                                       port100_in_comm_rf_complete, cb_arg);
1120 }
1121 
1122 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1123 {
1124         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1125         struct sk_buff *skb;
1126         struct sk_buff *resp;
1127         int rc;
1128 
1129         if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1130                 return -EINVAL;
1131 
1132         skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1133         if (!skb)
1134                 return -ENOMEM;
1135 
1136         memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)),
1137                &tg_rf_settings[rf],
1138                sizeof(struct port100_tg_rf_setting));
1139 
1140         resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
1141 
1142         if (IS_ERR(resp))
1143                 return PTR_ERR(resp);
1144 
1145         rc = resp->data[0];
1146 
1147         dev_kfree_skb(resp);
1148 
1149         return rc;
1150 }
1151 
1152 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
1153 {
1154         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1155         struct port100_protocol *protocols;
1156         struct sk_buff *skb;
1157         struct sk_buff *resp;
1158         int rc;
1159         int num_protocols;
1160         size_t size;
1161 
1162         if (param >= NFC_DIGITAL_FRAMING_LAST)
1163                 return -EINVAL;
1164 
1165         protocols = tg_protocols[param];
1166 
1167         num_protocols = 0;
1168         while (protocols[num_protocols].number != PORT100_TG_PROT_END)
1169                 num_protocols++;
1170 
1171         if (!num_protocols)
1172                 return 0;
1173 
1174         size = sizeof(struct port100_protocol) * num_protocols;
1175 
1176         skb = port100_alloc_skb(dev, size);
1177         if (!skb)
1178                 return -ENOMEM;
1179 
1180         memcpy(skb_put(skb, size), protocols, size);
1181 
1182         resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
1183 
1184         if (IS_ERR(resp))
1185                 return PTR_ERR(resp);
1186 
1187         rc = resp->data[0];
1188 
1189         dev_kfree_skb(resp);
1190 
1191         return rc;
1192 }
1193 
1194 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1195                                    int param)
1196 {
1197         if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1198                 return port100_tg_set_rf(ddev, param);
1199 
1200         if (type == NFC_DIGITAL_CONFIG_FRAMING)
1201                 return port100_tg_set_framing(ddev, param);
1202 
1203         return -EINVAL;
1204 }
1205 
1206 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
1207 {
1208         u8 mask;
1209 
1210         switch (dev->cmd_type) {
1211         case PORT100_CMD_TYPE_0:
1212                 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
1213                 break;
1214         case PORT100_CMD_TYPE_1:
1215                 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
1216                        PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
1217                 break;
1218         default:
1219                 nfc_err(&dev->interface->dev, "Unknonwn command type.\n");
1220                 return false;
1221         }
1222 
1223         return ((tgt_activated & mask) == mask);
1224 }
1225 
1226 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
1227                                         struct sk_buff *resp)
1228 {
1229         u32 status;
1230         struct port100_cb_arg *cb_arg = arg;
1231         nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1232         struct port100_tg_comm_rf_res *hdr;
1233 
1234         if (IS_ERR(resp))
1235                 goto exit;
1236 
1237         hdr = (struct port100_tg_comm_rf_res *)resp->data;
1238 
1239         status = le32_to_cpu(hdr->status);
1240 
1241         if (cb_arg->mdaa &&
1242             !port100_tg_target_activated(dev, hdr->target_activated)) {
1243                 kfree_skb(resp);
1244                 resp = ERR_PTR(-ETIMEDOUT);
1245 
1246                 goto exit;
1247         }
1248 
1249         skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
1250 
1251         if (status != PORT100_CMD_STATUS_OK) {
1252                 kfree_skb(resp);
1253 
1254                 if (status == PORT100_CMD_STATUS_TIMEOUT)
1255                         resp = ERR_PTR(-ETIMEDOUT);
1256                 else
1257                         resp = ERR_PTR(-EIO);
1258         }
1259 
1260 exit:
1261         cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1262 
1263         kfree(cb_arg);
1264 }
1265 
1266 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1267                                struct sk_buff *skb, u16 timeout,
1268                                nfc_digital_cmd_complete_t cb, void *arg)
1269 {
1270         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1271         struct port100_tg_comm_rf_cmd *hdr;
1272         struct port100_cb_arg *cb_arg;
1273 
1274         cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1275         if (!cb_arg)
1276                 return -ENOMEM;
1277 
1278         cb_arg->complete_cb = cb;
1279         cb_arg->complete_arg = arg;
1280 
1281         skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1282 
1283         hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1284 
1285         memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1286         hdr->guard_time = cpu_to_le16(500);
1287         hdr->send_timeout = cpu_to_le16(0xFFFF);
1288         hdr->recv_timeout = cpu_to_le16(timeout);
1289 
1290         return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1291                                       port100_tg_comm_rf_complete, cb_arg);
1292 }
1293 
1294 static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1295                                struct digital_tg_mdaa_params *params,
1296                                u16 timeout,
1297                                nfc_digital_cmd_complete_t cb, void *arg)
1298 {
1299         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1300         struct port100_tg_comm_rf_cmd *hdr;
1301         struct port100_cb_arg *cb_arg;
1302         struct sk_buff *skb;
1303         int rc;
1304 
1305         rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1306                                      NFC_DIGITAL_RF_TECH_106A);
1307         if (rc)
1308                 return rc;
1309 
1310         rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1311                                      NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1312         if (rc)
1313                 return rc;
1314 
1315         cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1316         if (!cb_arg)
1317                 return -ENOMEM;
1318 
1319         cb_arg->complete_cb = cb;
1320         cb_arg->complete_arg = arg;
1321         cb_arg->mdaa = 1;
1322 
1323         skb = port100_alloc_skb(dev, 0);
1324         if (!skb) {
1325                 kfree(cb_arg);
1326                 return -ENOMEM;
1327         }
1328 
1329         skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1330         hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1331 
1332         memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1333 
1334         hdr->guard_time = 0;
1335         hdr->send_timeout = cpu_to_le16(0xFFFF);
1336         hdr->mdaa = 1;
1337         hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
1338         hdr->nfca_param[1] = params->sens_res & 0xFF;
1339         memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
1340         hdr->nfca_param[5] = params->sel_res;
1341         memcpy(hdr->nfcf_param, params->nfcid2, 8);
1342         hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
1343         hdr->nfcf_param[17] = params->sc & 0xFF;
1344         hdr->recv_timeout = cpu_to_le16(timeout);
1345 
1346         return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1347                                       port100_tg_comm_rf_complete, cb_arg);
1348 }
1349 
1350 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1351                           nfc_digital_cmd_complete_t cb, void *arg)
1352 {
1353         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1354         struct sk_buff *skb;
1355 
1356         skb = port100_alloc_skb(dev, 0);
1357         if (!skb)
1358                 return -ENOMEM;
1359 
1360         return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
1361 }
1362 
1363 static struct nfc_digital_ops port100_digital_ops = {
1364         .in_configure_hw = port100_in_configure_hw,
1365         .in_send_cmd = port100_in_send_cmd,
1366 
1367         .tg_listen_mdaa = port100_listen_mdaa,
1368         .tg_listen = port100_listen,
1369         .tg_configure_hw = port100_tg_configure_hw,
1370         .tg_send_cmd = port100_tg_send_cmd,
1371 
1372         .switch_rf = port100_switch_rf,
1373         .abort_cmd = port100_abort_cmd,
1374 };
1375 
1376 static const struct usb_device_id port100_table[] = {
1377         { USB_DEVICE(SONY_VENDOR_ID, RCS380_PRODUCT_ID), },
1378         { }
1379 };
1380 MODULE_DEVICE_TABLE(usb, port100_table);
1381 
1382 static int port100_probe(struct usb_interface *interface,
1383                          const struct usb_device_id *id)
1384 {
1385         struct port100 *dev;
1386         int rc;
1387         struct usb_host_interface *iface_desc;
1388         struct usb_endpoint_descriptor *endpoint;
1389         int in_endpoint;
1390         int out_endpoint;
1391         u16 fw_version;
1392         u64 cmd_type_mask;
1393         int i;
1394 
1395         dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1396         if (!dev)
1397                 return -ENOMEM;
1398 
1399         dev->udev = usb_get_dev(interface_to_usbdev(interface));
1400         dev->interface = interface;
1401         usb_set_intfdata(interface, dev);
1402 
1403         in_endpoint = out_endpoint = 0;
1404         iface_desc = interface->cur_altsetting;
1405         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1406                 endpoint = &iface_desc->endpoint[i].desc;
1407 
1408                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1409                         in_endpoint = endpoint->bEndpointAddress;
1410 
1411                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1412                         out_endpoint = endpoint->bEndpointAddress;
1413         }
1414 
1415         if (!in_endpoint || !out_endpoint) {
1416                 nfc_err(&interface->dev,
1417                         "Could not find bulk-in or bulk-out endpoint\n");
1418                 rc = -ENODEV;
1419                 goto error;
1420         }
1421 
1422         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1423         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1424 
1425         if (!dev->in_urb || !dev->out_urb) {
1426                 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1427                 rc = -ENOMEM;
1428                 goto error;
1429         }
1430 
1431         usb_fill_bulk_urb(dev->in_urb, dev->udev,
1432                           usb_rcvbulkpipe(dev->udev, in_endpoint),
1433                           NULL, 0, NULL, dev);
1434         usb_fill_bulk_urb(dev->out_urb, dev->udev,
1435                           usb_sndbulkpipe(dev->udev, out_endpoint),
1436                           NULL, 0, port100_send_complete, dev);
1437 
1438         dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1439                             PORT100_COMM_RF_HEAD_MAX_LEN;
1440         dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1441 
1442         INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1443 
1444         /* The first thing to do with the Port-100 is to set the command type
1445          * to be used. If supported we use command type 1. 0 otherwise.
1446          */
1447         cmd_type_mask = port100_get_command_type_mask(dev);
1448         if (!cmd_type_mask) {
1449                 nfc_err(&interface->dev,
1450                         "Could not get supported command types.\n");
1451                 rc = -ENODEV;
1452                 goto error;
1453         }
1454 
1455         if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1456                 dev->cmd_type = PORT100_CMD_TYPE_1;
1457         else
1458                 dev->cmd_type = PORT100_CMD_TYPE_0;
1459 
1460         rc = port100_set_command_type(dev, dev->cmd_type);
1461         if (rc) {
1462                 nfc_err(&interface->dev,
1463                         "The device does not support command type %u.\n",
1464                         dev->cmd_type);
1465                 goto error;
1466         }
1467 
1468         fw_version = port100_get_firmware_version(dev);
1469         if (!fw_version)
1470                 nfc_err(&interface->dev,
1471                         "Could not get device firmware version.\n");
1472 
1473         nfc_info(&interface->dev,
1474                  "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1475                  (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1476 
1477         dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1478                                                            PORT100_PROTOCOLS,
1479                                                            PORT100_CAPABILITIES,
1480                                                            dev->skb_headroom,
1481                                                            dev->skb_tailroom);
1482         if (!dev->nfc_digital_dev) {
1483                 nfc_err(&interface->dev,
1484                         "Could not allocate nfc_digital_dev.\n");
1485                 rc = -ENOMEM;
1486                 goto error;
1487         }
1488 
1489         nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1490         nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1491 
1492         rc = nfc_digital_register_device(dev->nfc_digital_dev);
1493         if (rc) {
1494                 nfc_err(&interface->dev,
1495                         "Could not register digital device.\n");
1496                 goto free_nfc_dev;
1497         }
1498 
1499         return 0;
1500 
1501 free_nfc_dev:
1502         nfc_digital_free_device(dev->nfc_digital_dev);
1503 
1504 error:
1505         usb_free_urb(dev->in_urb);
1506         usb_free_urb(dev->out_urb);
1507         usb_put_dev(dev->udev);
1508 
1509         return rc;
1510 }
1511 
1512 static void port100_disconnect(struct usb_interface *interface)
1513 {
1514         struct port100 *dev;
1515 
1516         dev = usb_get_intfdata(interface);
1517         usb_set_intfdata(interface, NULL);
1518 
1519         nfc_digital_unregister_device(dev->nfc_digital_dev);
1520         nfc_digital_free_device(dev->nfc_digital_dev);
1521 
1522         usb_kill_urb(dev->in_urb);
1523         usb_kill_urb(dev->out_urb);
1524 
1525         usb_free_urb(dev->in_urb);
1526         usb_free_urb(dev->out_urb);
1527         usb_put_dev(dev->udev);
1528 
1529         kfree(dev->cmd);
1530 
1531         nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected");
1532 }
1533 
1534 static struct usb_driver port100_driver = {
1535         .name =         "port100",
1536         .probe =        port100_probe,
1537         .disconnect =   port100_disconnect,
1538         .id_table =     port100_table,
1539 };
1540 
1541 module_usb_driver(port100_driver);
1542 
1543 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1544 MODULE_VERSION(VERSION);
1545 MODULE_LICENSE("GPL");
1546 

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