port100.c 42 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Sony NFC Port-100 Series driver
  4. * Copyright (c) 2013, Intel Corporation.
  5. *
  6. * Partly based/Inspired by Stephen Tiedemann's nfcpy
  7. */
  8. #include <linux/module.h>
  9. #include <linux/usb.h>
  10. #include <net/nfc/digital.h>
  11. #define VERSION "0.1"
  12. #define SONY_VENDOR_ID 0x054c
  13. #define RCS380S_PRODUCT_ID 0x06c1
  14. #define RCS380P_PRODUCT_ID 0x06c3
  15. #define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
  16. NFC_PROTO_MIFARE_MASK | \
  17. NFC_PROTO_FELICA_MASK | \
  18. NFC_PROTO_NFC_DEP_MASK | \
  19. NFC_PROTO_ISO14443_MASK | \
  20. NFC_PROTO_ISO14443_B_MASK)
  21. #define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
  22. NFC_DIGITAL_DRV_CAPS_TG_CRC)
  23. /* Standard port100 frame definitions */
  24. #define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \
  25. + 2) /* data[0] CC, data[1] SCC */
  26. #define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  27. #define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd))
  28. /*
  29. * Max extended frame payload len, excluding CC and SCC
  30. * which are already in PORT100_FRAME_HEADER_LEN.
  31. */
  32. #define PORT100_FRAME_MAX_PAYLOAD_LEN 1001
  33. #define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
  34. Postamble (1) */
  35. static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
  36. 0x00, 0x00, 0xff, 0x00, 0xff, 0x00
  37. };
  38. #define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)])
  39. #define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1])
  40. /* start of frame */
  41. #define PORT100_FRAME_SOF 0x00FF
  42. #define PORT100_FRAME_EXT 0xFFFF
  43. #define PORT100_FRAME_ACK 0x00FF
  44. /* Port-100 command: in or out */
  45. #define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */
  46. #define PORT100_FRAME_DIR_OUT 0xD6
  47. #define PORT100_FRAME_DIR_IN 0xD7
  48. /* Port-100 sub-command */
  49. #define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */
  50. #define PORT100_CMD_GET_FIRMWARE_VERSION 0x20
  51. #define PORT100_CMD_GET_COMMAND_TYPE 0x28
  52. #define PORT100_CMD_SET_COMMAND_TYPE 0x2A
  53. #define PORT100_CMD_IN_SET_RF 0x00
  54. #define PORT100_CMD_IN_SET_PROTOCOL 0x02
  55. #define PORT100_CMD_IN_COMM_RF 0x04
  56. #define PORT100_CMD_TG_SET_RF 0x40
  57. #define PORT100_CMD_TG_SET_PROTOCOL 0x42
  58. #define PORT100_CMD_TG_SET_RF_OFF 0x46
  59. #define PORT100_CMD_TG_COMM_RF 0x48
  60. #define PORT100_CMD_SWITCH_RF 0x06
  61. #define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
  62. #define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
  63. ((mask) & (0x01 << (cmd_type)))
  64. #define PORT100_CMD_TYPE_0 0
  65. #define PORT100_CMD_TYPE_1 1
  66. #define PORT100_CMD_STATUS_OK 0x00
  67. #define PORT100_CMD_STATUS_TIMEOUT 0x80
  68. #define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
  69. #define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02
  70. struct port100;
  71. typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
  72. struct sk_buff *resp);
  73. /**
  74. * Setting sets structure for in_set_rf command
  75. *
  76. * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
  77. * This table contains multiple RF setting sets required for RF
  78. * communication.
  79. *
  80. * @in_*_comm_type: Theses fields set the communication type to be used.
  81. */
  82. struct port100_in_rf_setting {
  83. u8 in_send_set_number;
  84. u8 in_send_comm_type;
  85. u8 in_recv_set_number;
  86. u8 in_recv_comm_type;
  87. } __packed;
  88. #define PORT100_COMM_TYPE_IN_212F 0x01
  89. #define PORT100_COMM_TYPE_IN_424F 0x02
  90. #define PORT100_COMM_TYPE_IN_106A 0x03
  91. #define PORT100_COMM_TYPE_IN_106B 0x07
  92. static const struct port100_in_rf_setting in_rf_settings[] = {
  93. [NFC_DIGITAL_RF_TECH_212F] = {
  94. .in_send_set_number = 1,
  95. .in_send_comm_type = PORT100_COMM_TYPE_IN_212F,
  96. .in_recv_set_number = 15,
  97. .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F,
  98. },
  99. [NFC_DIGITAL_RF_TECH_424F] = {
  100. .in_send_set_number = 1,
  101. .in_send_comm_type = PORT100_COMM_TYPE_IN_424F,
  102. .in_recv_set_number = 15,
  103. .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F,
  104. },
  105. [NFC_DIGITAL_RF_TECH_106A] = {
  106. .in_send_set_number = 2,
  107. .in_send_comm_type = PORT100_COMM_TYPE_IN_106A,
  108. .in_recv_set_number = 15,
  109. .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A,
  110. },
  111. [NFC_DIGITAL_RF_TECH_106B] = {
  112. .in_send_set_number = 3,
  113. .in_send_comm_type = PORT100_COMM_TYPE_IN_106B,
  114. .in_recv_set_number = 15,
  115. .in_recv_comm_type = PORT100_COMM_TYPE_IN_106B,
  116. },
  117. /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
  118. [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
  119. };
  120. /**
  121. * Setting sets structure for tg_set_rf command
  122. *
  123. * @tg_set_number: Represents the entry index in the port-100 RF Base Table.
  124. * This table contains multiple RF setting sets required for RF
  125. * communication. this field is used for both send and receive
  126. * settings.
  127. *
  128. * @tg_comm_type: Sets the communication type to be used to send and receive
  129. * data.
  130. */
  131. struct port100_tg_rf_setting {
  132. u8 tg_set_number;
  133. u8 tg_comm_type;
  134. } __packed;
  135. #define PORT100_COMM_TYPE_TG_106A 0x0B
  136. #define PORT100_COMM_TYPE_TG_212F 0x0C
  137. #define PORT100_COMM_TYPE_TG_424F 0x0D
  138. static const struct port100_tg_rf_setting tg_rf_settings[] = {
  139. [NFC_DIGITAL_RF_TECH_106A] = {
  140. .tg_set_number = 8,
  141. .tg_comm_type = PORT100_COMM_TYPE_TG_106A,
  142. },
  143. [NFC_DIGITAL_RF_TECH_212F] = {
  144. .tg_set_number = 8,
  145. .tg_comm_type = PORT100_COMM_TYPE_TG_212F,
  146. },
  147. [NFC_DIGITAL_RF_TECH_424F] = {
  148. .tg_set_number = 8,
  149. .tg_comm_type = PORT100_COMM_TYPE_TG_424F,
  150. },
  151. /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
  152. [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
  153. };
  154. #define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
  155. #define PORT100_IN_PROT_ADD_CRC 0x01
  156. #define PORT100_IN_PROT_CHECK_CRC 0x02
  157. #define PORT100_IN_PROT_MULTI_CARD 0x03
  158. #define PORT100_IN_PROT_ADD_PARITY 0x04
  159. #define PORT100_IN_PROT_CHECK_PARITY 0x05
  160. #define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06
  161. #define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07
  162. #define PORT100_IN_PROT_CRYPTO1 0x08
  163. #define PORT100_IN_PROT_ADD_SOF 0x09
  164. #define PORT100_IN_PROT_CHECK_SOF 0x0A
  165. #define PORT100_IN_PROT_ADD_EOF 0x0B
  166. #define PORT100_IN_PROT_CHECK_EOF 0x0C
  167. #define PORT100_IN_PROT_DEAF_TIME 0x0E
  168. #define PORT100_IN_PROT_CRM 0x0F
  169. #define PORT100_IN_PROT_CRM_MIN_LEN 0x10
  170. #define PORT100_IN_PROT_T1_TAG_FRAME 0x11
  171. #define PORT100_IN_PROT_RFCA 0x12
  172. #define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
  173. #define PORT100_IN_PROT_END 0x14
  174. #define PORT100_IN_MAX_NUM_PROTOCOLS 19
  175. #define PORT100_TG_PROT_TU 0x00
  176. #define PORT100_TG_PROT_RF_OFF 0x01
  177. #define PORT100_TG_PROT_CRM 0x02
  178. #define PORT100_TG_PROT_END 0x03
  179. #define PORT100_TG_MAX_NUM_PROTOCOLS 3
  180. struct port100_protocol {
  181. u8 number;
  182. u8 value;
  183. } __packed;
  184. static struct port100_protocol
  185. in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
  186. [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
  187. { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
  188. { PORT100_IN_PROT_ADD_CRC, 0 },
  189. { PORT100_IN_PROT_CHECK_CRC, 0 },
  190. { PORT100_IN_PROT_MULTI_CARD, 0 },
  191. { PORT100_IN_PROT_ADD_PARITY, 0 },
  192. { PORT100_IN_PROT_CHECK_PARITY, 1 },
  193. { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
  194. { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 },
  195. { PORT100_IN_PROT_CRYPTO1, 0 },
  196. { PORT100_IN_PROT_ADD_SOF, 0 },
  197. { PORT100_IN_PROT_CHECK_SOF, 0 },
  198. { PORT100_IN_PROT_ADD_EOF, 0 },
  199. { PORT100_IN_PROT_CHECK_EOF, 0 },
  200. { PORT100_IN_PROT_DEAF_TIME, 4 },
  201. { PORT100_IN_PROT_CRM, 0 },
  202. { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
  203. { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
  204. { PORT100_IN_PROT_RFCA, 0 },
  205. { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
  206. { PORT100_IN_PROT_END, 0 },
  207. },
  208. [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
  209. { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
  210. { PORT100_IN_PROT_ADD_CRC, 0 },
  211. { PORT100_IN_PROT_CHECK_CRC, 0 },
  212. { PORT100_IN_PROT_MULTI_CARD, 0 },
  213. { PORT100_IN_PROT_ADD_PARITY, 1 },
  214. { PORT100_IN_PROT_CHECK_PARITY, 1 },
  215. { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
  216. { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
  217. { PORT100_IN_PROT_CRYPTO1, 0 },
  218. { PORT100_IN_PROT_ADD_SOF, 0 },
  219. { PORT100_IN_PROT_CHECK_SOF, 0 },
  220. { PORT100_IN_PROT_ADD_EOF, 0 },
  221. { PORT100_IN_PROT_CHECK_EOF, 0 },
  222. { PORT100_IN_PROT_DEAF_TIME, 4 },
  223. { PORT100_IN_PROT_CRM, 0 },
  224. { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
  225. { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
  226. { PORT100_IN_PROT_RFCA, 0 },
  227. { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
  228. { PORT100_IN_PROT_END, 0 },
  229. },
  230. [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
  231. { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
  232. { PORT100_IN_PROT_ADD_CRC, 1 },
  233. { PORT100_IN_PROT_CHECK_CRC, 1 },
  234. { PORT100_IN_PROT_MULTI_CARD, 0 },
  235. { PORT100_IN_PROT_ADD_PARITY, 1 },
  236. { PORT100_IN_PROT_CHECK_PARITY, 1 },
  237. { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
  238. { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
  239. { PORT100_IN_PROT_CRYPTO1, 0 },
  240. { PORT100_IN_PROT_ADD_SOF, 0 },
  241. { PORT100_IN_PROT_CHECK_SOF, 0 },
  242. { PORT100_IN_PROT_ADD_EOF, 0 },
  243. { PORT100_IN_PROT_CHECK_EOF, 0 },
  244. { PORT100_IN_PROT_DEAF_TIME, 4 },
  245. { PORT100_IN_PROT_CRM, 0 },
  246. { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
  247. { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
  248. { PORT100_IN_PROT_RFCA, 0 },
  249. { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
  250. { PORT100_IN_PROT_END, 0 },
  251. },
  252. [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
  253. /* nfc_digital_framing_nfca_short */
  254. { PORT100_IN_PROT_ADD_CRC, 2 },
  255. { PORT100_IN_PROT_CHECK_CRC, 2 },
  256. { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
  257. { PORT100_IN_PROT_T1_TAG_FRAME, 2 },
  258. { PORT100_IN_PROT_END, 0 },
  259. },
  260. [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
  261. /* nfc_digital_framing_nfca_standard */
  262. { PORT100_IN_PROT_ADD_CRC, 1 },
  263. { PORT100_IN_PROT_CHECK_CRC, 0 },
  264. { PORT100_IN_PROT_END, 0 },
  265. },
  266. [NFC_DIGITAL_FRAMING_NFCA_T4T] = {
  267. /* nfc_digital_framing_nfca_standard_with_crc_a */
  268. { PORT100_IN_PROT_END, 0 },
  269. },
  270. [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
  271. /* nfc_digital_framing_nfca_standard */
  272. { PORT100_IN_PROT_END, 0 },
  273. },
  274. [NFC_DIGITAL_FRAMING_NFCF] = {
  275. { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
  276. { PORT100_IN_PROT_ADD_CRC, 1 },
  277. { PORT100_IN_PROT_CHECK_CRC, 1 },
  278. { PORT100_IN_PROT_MULTI_CARD, 0 },
  279. { PORT100_IN_PROT_ADD_PARITY, 0 },
  280. { PORT100_IN_PROT_CHECK_PARITY, 0 },
  281. { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
  282. { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
  283. { PORT100_IN_PROT_CRYPTO1, 0 },
  284. { PORT100_IN_PROT_ADD_SOF, 0 },
  285. { PORT100_IN_PROT_CHECK_SOF, 0 },
  286. { PORT100_IN_PROT_ADD_EOF, 0 },
  287. { PORT100_IN_PROT_CHECK_EOF, 0 },
  288. { PORT100_IN_PROT_DEAF_TIME, 4 },
  289. { PORT100_IN_PROT_CRM, 0 },
  290. { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
  291. { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
  292. { PORT100_IN_PROT_RFCA, 0 },
  293. { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
  294. { PORT100_IN_PROT_END, 0 },
  295. },
  296. [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
  297. /* nfc_digital_framing_nfcf */
  298. { PORT100_IN_PROT_END, 0 },
  299. },
  300. [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
  301. /* nfc_digital_framing_nfcf */
  302. { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
  303. { PORT100_IN_PROT_ADD_CRC, 1 },
  304. { PORT100_IN_PROT_CHECK_CRC, 1 },
  305. { PORT100_IN_PROT_MULTI_CARD, 0 },
  306. { PORT100_IN_PROT_ADD_PARITY, 0 },
  307. { PORT100_IN_PROT_CHECK_PARITY, 0 },
  308. { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
  309. { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
  310. { PORT100_IN_PROT_CRYPTO1, 0 },
  311. { PORT100_IN_PROT_ADD_SOF, 0 },
  312. { PORT100_IN_PROT_CHECK_SOF, 0 },
  313. { PORT100_IN_PROT_ADD_EOF, 0 },
  314. { PORT100_IN_PROT_CHECK_EOF, 0 },
  315. { PORT100_IN_PROT_DEAF_TIME, 4 },
  316. { PORT100_IN_PROT_CRM, 0 },
  317. { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
  318. { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
  319. { PORT100_IN_PROT_RFCA, 0 },
  320. { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
  321. { PORT100_IN_PROT_END, 0 },
  322. },
  323. [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
  324. { PORT100_IN_PROT_END, 0 },
  325. },
  326. [NFC_DIGITAL_FRAMING_NFCB] = {
  327. { PORT100_IN_PROT_INITIAL_GUARD_TIME, 20 },
  328. { PORT100_IN_PROT_ADD_CRC, 1 },
  329. { PORT100_IN_PROT_CHECK_CRC, 1 },
  330. { PORT100_IN_PROT_MULTI_CARD, 0 },
  331. { PORT100_IN_PROT_ADD_PARITY, 0 },
  332. { PORT100_IN_PROT_CHECK_PARITY, 0 },
  333. { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
  334. { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
  335. { PORT100_IN_PROT_CRYPTO1, 0 },
  336. { PORT100_IN_PROT_ADD_SOF, 1 },
  337. { PORT100_IN_PROT_CHECK_SOF, 1 },
  338. { PORT100_IN_PROT_ADD_EOF, 1 },
  339. { PORT100_IN_PROT_CHECK_EOF, 1 },
  340. { PORT100_IN_PROT_DEAF_TIME, 4 },
  341. { PORT100_IN_PROT_CRM, 0 },
  342. { PORT100_IN_PROT_CRM_MIN_LEN, 0 },
  343. { PORT100_IN_PROT_T1_TAG_FRAME, 0 },
  344. { PORT100_IN_PROT_RFCA, 0 },
  345. { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
  346. { PORT100_IN_PROT_END, 0 },
  347. },
  348. [NFC_DIGITAL_FRAMING_NFCB_T4T] = {
  349. /* nfc_digital_framing_nfcb */
  350. { PORT100_IN_PROT_END, 0 },
  351. },
  352. /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
  353. [NFC_DIGITAL_FRAMING_LAST] = {
  354. { PORT100_IN_PROT_END, 0 },
  355. },
  356. };
  357. static struct port100_protocol
  358. tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
  359. [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
  360. { PORT100_TG_PROT_END, 0 },
  361. },
  362. [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
  363. { PORT100_TG_PROT_END, 0 },
  364. },
  365. [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
  366. { PORT100_TG_PROT_END, 0 },
  367. },
  368. [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
  369. { PORT100_TG_PROT_END, 0 },
  370. },
  371. [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
  372. { PORT100_TG_PROT_END, 0 },
  373. },
  374. [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
  375. { PORT100_TG_PROT_TU, 1 },
  376. { PORT100_TG_PROT_RF_OFF, 0 },
  377. { PORT100_TG_PROT_CRM, 7 },
  378. { PORT100_TG_PROT_END, 0 },
  379. },
  380. [NFC_DIGITAL_FRAMING_NFCF] = {
  381. { PORT100_TG_PROT_END, 0 },
  382. },
  383. [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
  384. { PORT100_TG_PROT_END, 0 },
  385. },
  386. [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
  387. { PORT100_TG_PROT_TU, 1 },
  388. { PORT100_TG_PROT_RF_OFF, 0 },
  389. { PORT100_TG_PROT_CRM, 7 },
  390. { PORT100_TG_PROT_END, 0 },
  391. },
  392. [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
  393. { PORT100_TG_PROT_RF_OFF, 1 },
  394. { PORT100_TG_PROT_END, 0 },
  395. },
  396. /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
  397. [NFC_DIGITAL_FRAMING_LAST] = {
  398. { PORT100_TG_PROT_END, 0 },
  399. },
  400. };
  401. struct port100 {
  402. struct nfc_digital_dev *nfc_digital_dev;
  403. int skb_headroom;
  404. int skb_tailroom;
  405. struct usb_device *udev;
  406. struct usb_interface *interface;
  407. struct urb *out_urb;
  408. struct urb *in_urb;
  409. /* This mutex protects the out_urb and avoids to submit a new command
  410. * through port100_send_frame_async() while the previous one is being
  411. * canceled through port100_abort_cmd().
  412. */
  413. struct mutex out_urb_lock;
  414. struct work_struct cmd_complete_work;
  415. u8 cmd_type;
  416. /* The digital stack serializes commands to be sent. There is no need
  417. * for any queuing/locking mechanism at driver level.
  418. */
  419. struct port100_cmd *cmd;
  420. bool cmd_cancel;
  421. struct completion cmd_cancel_done;
  422. };
  423. struct port100_cmd {
  424. u8 code;
  425. int status;
  426. struct sk_buff *req;
  427. struct sk_buff *resp;
  428. int resp_len;
  429. port100_send_async_complete_t complete_cb;
  430. void *complete_cb_context;
  431. };
  432. struct port100_frame {
  433. u8 preamble;
  434. __be16 start_frame;
  435. __be16 extended_frame;
  436. __le16 datalen;
  437. u8 datalen_checksum;
  438. u8 data[];
  439. } __packed;
  440. struct port100_ack_frame {
  441. u8 preamble;
  442. __be16 start_frame;
  443. __be16 ack_frame;
  444. u8 postambule;
  445. } __packed;
  446. struct port100_cb_arg {
  447. nfc_digital_cmd_complete_t complete_cb;
  448. void *complete_arg;
  449. u8 mdaa;
  450. };
  451. struct port100_tg_comm_rf_cmd {
  452. __le16 guard_time;
  453. __le16 send_timeout;
  454. u8 mdaa;
  455. u8 nfca_param[6];
  456. u8 nfcf_param[18];
  457. u8 mf_halted;
  458. u8 arae_flag;
  459. __le16 recv_timeout;
  460. u8 data[];
  461. } __packed;
  462. struct port100_tg_comm_rf_res {
  463. u8 comm_type;
  464. u8 ar_status;
  465. u8 target_activated;
  466. __le32 status;
  467. u8 data[];
  468. } __packed;
  469. /* The rule: value + checksum = 0 */
  470. static inline u8 port100_checksum(u16 value)
  471. {
  472. return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
  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. for (i = 0; i < datalen; i++)
  480. sum += data[i];
  481. return port100_checksum(sum);
  482. }
  483. static void port100_tx_frame_init(void *_frame, u8 cmd_code)
  484. {
  485. struct port100_frame *frame = _frame;
  486. frame->preamble = 0;
  487. frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
  488. frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
  489. PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
  490. PORT100_FRAME_CMD(frame) = cmd_code;
  491. frame->datalen = cpu_to_le16(2);
  492. }
  493. static void port100_tx_frame_finish(void *_frame)
  494. {
  495. struct port100_frame *frame = _frame;
  496. frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
  497. PORT100_FRAME_CHECKSUM(frame) =
  498. port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
  499. PORT100_FRAME_POSTAMBLE(frame) = 0;
  500. }
  501. static void port100_tx_update_payload_len(void *_frame, int len)
  502. {
  503. struct port100_frame *frame = _frame;
  504. le16_add_cpu(&frame->datalen, len);
  505. }
  506. static bool port100_rx_frame_is_valid(void *_frame)
  507. {
  508. u8 checksum;
  509. struct port100_frame *frame = _frame;
  510. if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
  511. frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
  512. return false;
  513. checksum = port100_checksum(le16_to_cpu(frame->datalen));
  514. if (checksum != frame->datalen_checksum)
  515. return false;
  516. checksum = port100_data_checksum(frame->data,
  517. le16_to_cpu(frame->datalen));
  518. if (checksum != PORT100_FRAME_CHECKSUM(frame))
  519. return false;
  520. return true;
  521. }
  522. static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
  523. {
  524. return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
  525. frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
  526. }
  527. static inline int port100_rx_frame_size(void *frame)
  528. {
  529. struct port100_frame *f = frame;
  530. return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
  531. PORT100_FRAME_TAIL_LEN;
  532. }
  533. static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
  534. {
  535. struct port100_frame *f = frame;
  536. return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
  537. }
  538. static void port100_recv_response(struct urb *urb)
  539. {
  540. struct port100 *dev = urb->context;
  541. struct port100_cmd *cmd = dev->cmd;
  542. u8 *in_frame;
  543. cmd->status = urb->status;
  544. switch (urb->status) {
  545. case 0:
  546. break; /* success */
  547. case -ECONNRESET:
  548. case -ENOENT:
  549. nfc_err(&dev->interface->dev,
  550. "The urb has been canceled (status %d)\n", urb->status);
  551. goto sched_wq;
  552. case -ESHUTDOWN:
  553. default:
  554. nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
  555. urb->status);
  556. goto sched_wq;
  557. }
  558. in_frame = dev->in_urb->transfer_buffer;
  559. if (!port100_rx_frame_is_valid(in_frame)) {
  560. nfc_err(&dev->interface->dev, "Received an invalid frame\n");
  561. cmd->status = -EIO;
  562. goto sched_wq;
  563. }
  564. print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
  565. port100_rx_frame_size(in_frame), false);
  566. if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
  567. nfc_err(&dev->interface->dev,
  568. "It's not the response to the last command\n");
  569. cmd->status = -EIO;
  570. goto sched_wq;
  571. }
  572. sched_wq:
  573. schedule_work(&dev->cmd_complete_work);
  574. }
  575. static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
  576. {
  577. dev->in_urb->complete = port100_recv_response;
  578. return usb_submit_urb(dev->in_urb, flags);
  579. }
  580. static void port100_recv_ack(struct urb *urb)
  581. {
  582. struct port100 *dev = urb->context;
  583. struct port100_cmd *cmd = dev->cmd;
  584. struct port100_ack_frame *in_frame;
  585. int rc;
  586. cmd->status = urb->status;
  587. switch (urb->status) {
  588. case 0:
  589. break; /* success */
  590. case -ECONNRESET:
  591. case -ENOENT:
  592. nfc_err(&dev->interface->dev,
  593. "The urb has been stopped (status %d)\n", urb->status);
  594. goto sched_wq;
  595. case -ESHUTDOWN:
  596. default:
  597. nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
  598. urb->status);
  599. goto sched_wq;
  600. }
  601. in_frame = dev->in_urb->transfer_buffer;
  602. if (!port100_rx_frame_is_ack(in_frame)) {
  603. nfc_err(&dev->interface->dev, "Received an invalid ack\n");
  604. cmd->status = -EIO;
  605. goto sched_wq;
  606. }
  607. rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
  608. if (rc) {
  609. nfc_err(&dev->interface->dev,
  610. "usb_submit_urb failed with result %d\n", rc);
  611. cmd->status = rc;
  612. goto sched_wq;
  613. }
  614. return;
  615. sched_wq:
  616. schedule_work(&dev->cmd_complete_work);
  617. }
  618. static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
  619. {
  620. dev->in_urb->complete = port100_recv_ack;
  621. return usb_submit_urb(dev->in_urb, flags);
  622. }
  623. static int port100_send_ack(struct port100 *dev)
  624. {
  625. int rc = 0;
  626. mutex_lock(&dev->out_urb_lock);
  627. /*
  628. * If prior cancel is in-flight (dev->cmd_cancel == true), we
  629. * can skip to send cancel. Then this will wait the prior
  630. * cancel, or merged into the next cancel rarely if next
  631. * cancel was started before waiting done. In any case, this
  632. * will be waked up soon or later.
  633. */
  634. if (!dev->cmd_cancel) {
  635. reinit_completion(&dev->cmd_cancel_done);
  636. usb_kill_urb(dev->out_urb);
  637. dev->out_urb->transfer_buffer = ack_frame;
  638. dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
  639. rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
  640. /*
  641. * Set the cmd_cancel flag only if the URB has been
  642. * successfully submitted. It will be reset by the out
  643. * URB completion callback port100_send_complete().
  644. */
  645. dev->cmd_cancel = !rc;
  646. }
  647. mutex_unlock(&dev->out_urb_lock);
  648. if (!rc)
  649. wait_for_completion(&dev->cmd_cancel_done);
  650. return rc;
  651. }
  652. static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
  653. struct sk_buff *in, int in_len)
  654. {
  655. int rc;
  656. mutex_lock(&dev->out_urb_lock);
  657. /* A command cancel frame as been sent through dev->out_urb. Don't try
  658. * to submit a new one.
  659. */
  660. if (dev->cmd_cancel) {
  661. rc = -EAGAIN;
  662. goto exit;
  663. }
  664. dev->out_urb->transfer_buffer = out->data;
  665. dev->out_urb->transfer_buffer_length = out->len;
  666. dev->in_urb->transfer_buffer = in->data;
  667. dev->in_urb->transfer_buffer_length = in_len;
  668. print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
  669. out->data, out->len, false);
  670. rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
  671. if (rc)
  672. goto exit;
  673. rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
  674. if (rc)
  675. usb_kill_urb(dev->out_urb);
  676. exit:
  677. mutex_unlock(&dev->out_urb_lock);
  678. return rc;
  679. }
  680. static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
  681. struct sk_buff *skb)
  682. {
  683. /* payload is already there, just update datalen */
  684. int payload_len = skb->len;
  685. skb_push(skb, PORT100_FRAME_HEADER_LEN);
  686. skb_put(skb, PORT100_FRAME_TAIL_LEN);
  687. port100_tx_frame_init(skb->data, cmd_code);
  688. port100_tx_update_payload_len(skb->data, payload_len);
  689. port100_tx_frame_finish(skb->data);
  690. }
  691. static void port100_send_async_complete(struct port100 *dev)
  692. {
  693. struct port100_cmd *cmd = dev->cmd;
  694. int status = cmd->status;
  695. struct sk_buff *req = cmd->req;
  696. struct sk_buff *resp = cmd->resp;
  697. dev_kfree_skb(req);
  698. dev->cmd = NULL;
  699. if (status < 0) {
  700. cmd->complete_cb(dev, cmd->complete_cb_context,
  701. ERR_PTR(status));
  702. dev_kfree_skb(resp);
  703. goto done;
  704. }
  705. skb_put(resp, port100_rx_frame_size(resp->data));
  706. skb_pull(resp, PORT100_FRAME_HEADER_LEN);
  707. skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
  708. cmd->complete_cb(dev, cmd->complete_cb_context, resp);
  709. done:
  710. kfree(cmd);
  711. }
  712. static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
  713. struct sk_buff *req,
  714. port100_send_async_complete_t complete_cb,
  715. void *complete_cb_context)
  716. {
  717. struct port100_cmd *cmd;
  718. struct sk_buff *resp;
  719. int rc;
  720. int resp_len = PORT100_FRAME_HEADER_LEN +
  721. PORT100_FRAME_MAX_PAYLOAD_LEN +
  722. PORT100_FRAME_TAIL_LEN;
  723. if (dev->cmd) {
  724. nfc_err(&dev->interface->dev,
  725. "A command is still in process\n");
  726. return -EBUSY;
  727. }
  728. resp = alloc_skb(resp_len, GFP_KERNEL);
  729. if (!resp)
  730. return -ENOMEM;
  731. cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
  732. if (!cmd) {
  733. dev_kfree_skb(resp);
  734. return -ENOMEM;
  735. }
  736. cmd->code = cmd_code;
  737. cmd->req = req;
  738. cmd->resp = resp;
  739. cmd->resp_len = resp_len;
  740. cmd->complete_cb = complete_cb;
  741. cmd->complete_cb_context = complete_cb_context;
  742. port100_build_cmd_frame(dev, cmd_code, req);
  743. dev->cmd = cmd;
  744. rc = port100_send_frame_async(dev, req, resp, resp_len);
  745. if (rc) {
  746. kfree(cmd);
  747. dev_kfree_skb(resp);
  748. dev->cmd = NULL;
  749. }
  750. return rc;
  751. }
  752. struct port100_sync_cmd_response {
  753. struct sk_buff *resp;
  754. struct completion done;
  755. };
  756. static void port100_wq_cmd_complete(struct work_struct *work)
  757. {
  758. struct port100 *dev = container_of(work, struct port100,
  759. cmd_complete_work);
  760. port100_send_async_complete(dev);
  761. }
  762. static void port100_send_sync_complete(struct port100 *dev, void *_arg,
  763. struct sk_buff *resp)
  764. {
  765. struct port100_sync_cmd_response *arg = _arg;
  766. arg->resp = resp;
  767. complete(&arg->done);
  768. }
  769. static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
  770. struct sk_buff *req)
  771. {
  772. int rc;
  773. struct port100_sync_cmd_response arg;
  774. init_completion(&arg.done);
  775. rc = port100_send_cmd_async(dev, cmd_code, req,
  776. port100_send_sync_complete, &arg);
  777. if (rc) {
  778. dev_kfree_skb(req);
  779. return ERR_PTR(rc);
  780. }
  781. wait_for_completion(&arg.done);
  782. return arg.resp;
  783. }
  784. static void port100_send_complete(struct urb *urb)
  785. {
  786. struct port100 *dev = urb->context;
  787. if (dev->cmd_cancel) {
  788. complete_all(&dev->cmd_cancel_done);
  789. dev->cmd_cancel = false;
  790. }
  791. switch (urb->status) {
  792. case 0:
  793. break; /* success */
  794. case -ECONNRESET:
  795. case -ENOENT:
  796. nfc_err(&dev->interface->dev,
  797. "The urb has been stopped (status %d)\n", urb->status);
  798. break;
  799. case -ESHUTDOWN:
  800. default:
  801. nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
  802. urb->status);
  803. }
  804. }
  805. static void port100_abort_cmd(struct nfc_digital_dev *ddev)
  806. {
  807. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  808. /* An ack will cancel the last issued command */
  809. port100_send_ack(dev);
  810. /* cancel the urb request */
  811. usb_kill_urb(dev->in_urb);
  812. }
  813. static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
  814. {
  815. struct sk_buff *skb;
  816. skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
  817. GFP_KERNEL);
  818. if (skb)
  819. skb_reserve(skb, dev->skb_headroom);
  820. return skb;
  821. }
  822. static int port100_set_command_type(struct port100 *dev, u8 command_type)
  823. {
  824. struct sk_buff *skb;
  825. struct sk_buff *resp;
  826. int rc;
  827. skb = port100_alloc_skb(dev, 1);
  828. if (!skb)
  829. return -ENOMEM;
  830. skb_put_u8(skb, command_type);
  831. resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
  832. if (IS_ERR(resp))
  833. return PTR_ERR(resp);
  834. rc = resp->data[0];
  835. dev_kfree_skb(resp);
  836. return rc;
  837. }
  838. static u64 port100_get_command_type_mask(struct port100 *dev)
  839. {
  840. struct sk_buff *skb;
  841. struct sk_buff *resp;
  842. u64 mask;
  843. skb = port100_alloc_skb(dev, 0);
  844. if (!skb)
  845. return 0;
  846. resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
  847. if (IS_ERR(resp))
  848. return 0;
  849. if (resp->len < 8)
  850. mask = 0;
  851. else
  852. mask = be64_to_cpu(*(__be64 *)resp->data);
  853. dev_kfree_skb(resp);
  854. return mask;
  855. }
  856. static u16 port100_get_firmware_version(struct port100 *dev)
  857. {
  858. struct sk_buff *skb;
  859. struct sk_buff *resp;
  860. u16 fw_ver;
  861. skb = port100_alloc_skb(dev, 0);
  862. if (!skb)
  863. return 0;
  864. resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
  865. skb);
  866. if (IS_ERR(resp))
  867. return 0;
  868. fw_ver = le16_to_cpu(*(__le16 *)resp->data);
  869. dev_kfree_skb(resp);
  870. return fw_ver;
  871. }
  872. static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
  873. {
  874. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  875. struct sk_buff *skb, *resp;
  876. skb = port100_alloc_skb(dev, 1);
  877. if (!skb)
  878. return -ENOMEM;
  879. skb_put_u8(skb, on ? 1 : 0);
  880. /* Cancel the last command if the device is being switched off */
  881. if (!on)
  882. port100_abort_cmd(ddev);
  883. resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
  884. if (IS_ERR(resp))
  885. return PTR_ERR(resp);
  886. dev_kfree_skb(resp);
  887. return 0;
  888. }
  889. static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
  890. {
  891. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  892. struct sk_buff *skb;
  893. struct sk_buff *resp;
  894. int rc;
  895. if (rf >= NFC_DIGITAL_RF_TECH_LAST)
  896. return -EINVAL;
  897. skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
  898. if (!skb)
  899. return -ENOMEM;
  900. skb_put_data(skb, &in_rf_settings[rf],
  901. sizeof(struct port100_in_rf_setting));
  902. resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
  903. if (IS_ERR(resp))
  904. return PTR_ERR(resp);
  905. rc = resp->data[0];
  906. dev_kfree_skb(resp);
  907. return rc;
  908. }
  909. static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
  910. {
  911. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  912. struct port100_protocol *protocols;
  913. struct sk_buff *skb;
  914. struct sk_buff *resp;
  915. int num_protocols;
  916. size_t size;
  917. int rc;
  918. if (param >= NFC_DIGITAL_FRAMING_LAST)
  919. return -EINVAL;
  920. protocols = in_protocols[param];
  921. num_protocols = 0;
  922. while (protocols[num_protocols].number != PORT100_IN_PROT_END)
  923. num_protocols++;
  924. if (!num_protocols)
  925. return 0;
  926. size = sizeof(struct port100_protocol) * num_protocols;
  927. skb = port100_alloc_skb(dev, size);
  928. if (!skb)
  929. return -ENOMEM;
  930. skb_put_data(skb, protocols, size);
  931. resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
  932. if (IS_ERR(resp))
  933. return PTR_ERR(resp);
  934. rc = resp->data[0];
  935. dev_kfree_skb(resp);
  936. return rc;
  937. }
  938. static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
  939. int param)
  940. {
  941. if (type == NFC_DIGITAL_CONFIG_RF_TECH)
  942. return port100_in_set_rf(ddev, param);
  943. if (type == NFC_DIGITAL_CONFIG_FRAMING)
  944. return port100_in_set_framing(ddev, param);
  945. return -EINVAL;
  946. }
  947. static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
  948. struct sk_buff *resp)
  949. {
  950. struct port100_cb_arg *cb_arg = arg;
  951. nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
  952. u32 status;
  953. int rc;
  954. if (IS_ERR(resp)) {
  955. rc = PTR_ERR(resp);
  956. goto exit;
  957. }
  958. if (resp->len < 4) {
  959. nfc_err(&dev->interface->dev,
  960. "Invalid packet length received\n");
  961. rc = -EIO;
  962. goto error;
  963. }
  964. status = le32_to_cpu(*(__le32 *)resp->data);
  965. skb_pull(resp, sizeof(u32));
  966. if (status == PORT100_CMD_STATUS_TIMEOUT) {
  967. rc = -ETIMEDOUT;
  968. goto error;
  969. }
  970. if (status != PORT100_CMD_STATUS_OK) {
  971. nfc_err(&dev->interface->dev,
  972. "in_comm_rf failed with status 0x%08x\n", status);
  973. rc = -EIO;
  974. goto error;
  975. }
  976. /* Remove collision bits byte */
  977. skb_pull(resp, 1);
  978. goto exit;
  979. error:
  980. kfree_skb(resp);
  981. resp = ERR_PTR(rc);
  982. exit:
  983. cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
  984. kfree(cb_arg);
  985. }
  986. static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
  987. struct sk_buff *skb, u16 _timeout,
  988. nfc_digital_cmd_complete_t cb, void *arg)
  989. {
  990. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  991. struct port100_cb_arg *cb_arg;
  992. __le16 timeout;
  993. cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
  994. if (!cb_arg)
  995. return -ENOMEM;
  996. cb_arg->complete_cb = cb;
  997. cb_arg->complete_arg = arg;
  998. timeout = cpu_to_le16(_timeout * 10);
  999. memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
  1000. return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
  1001. port100_in_comm_rf_complete, cb_arg);
  1002. }
  1003. static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
  1004. {
  1005. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  1006. struct sk_buff *skb;
  1007. struct sk_buff *resp;
  1008. int rc;
  1009. if (rf >= NFC_DIGITAL_RF_TECH_LAST)
  1010. return -EINVAL;
  1011. skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
  1012. if (!skb)
  1013. return -ENOMEM;
  1014. skb_put_data(skb, &tg_rf_settings[rf],
  1015. sizeof(struct port100_tg_rf_setting));
  1016. resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
  1017. if (IS_ERR(resp))
  1018. return PTR_ERR(resp);
  1019. rc = resp->data[0];
  1020. dev_kfree_skb(resp);
  1021. return rc;
  1022. }
  1023. static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
  1024. {
  1025. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  1026. struct port100_protocol *protocols;
  1027. struct sk_buff *skb;
  1028. struct sk_buff *resp;
  1029. int rc;
  1030. int num_protocols;
  1031. size_t size;
  1032. if (param >= NFC_DIGITAL_FRAMING_LAST)
  1033. return -EINVAL;
  1034. protocols = tg_protocols[param];
  1035. num_protocols = 0;
  1036. while (protocols[num_protocols].number != PORT100_TG_PROT_END)
  1037. num_protocols++;
  1038. if (!num_protocols)
  1039. return 0;
  1040. size = sizeof(struct port100_protocol) * num_protocols;
  1041. skb = port100_alloc_skb(dev, size);
  1042. if (!skb)
  1043. return -ENOMEM;
  1044. skb_put_data(skb, protocols, size);
  1045. resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
  1046. if (IS_ERR(resp))
  1047. return PTR_ERR(resp);
  1048. rc = resp->data[0];
  1049. dev_kfree_skb(resp);
  1050. return rc;
  1051. }
  1052. static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
  1053. int param)
  1054. {
  1055. if (type == NFC_DIGITAL_CONFIG_RF_TECH)
  1056. return port100_tg_set_rf(ddev, param);
  1057. if (type == NFC_DIGITAL_CONFIG_FRAMING)
  1058. return port100_tg_set_framing(ddev, param);
  1059. return -EINVAL;
  1060. }
  1061. static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
  1062. {
  1063. u8 mask;
  1064. switch (dev->cmd_type) {
  1065. case PORT100_CMD_TYPE_0:
  1066. mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
  1067. break;
  1068. case PORT100_CMD_TYPE_1:
  1069. mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
  1070. PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
  1071. break;
  1072. default:
  1073. nfc_err(&dev->interface->dev, "Unknown command type\n");
  1074. return false;
  1075. }
  1076. return ((tgt_activated & mask) == mask);
  1077. }
  1078. static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
  1079. struct sk_buff *resp)
  1080. {
  1081. u32 status;
  1082. struct port100_cb_arg *cb_arg = arg;
  1083. nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
  1084. struct port100_tg_comm_rf_res *hdr;
  1085. if (IS_ERR(resp))
  1086. goto exit;
  1087. hdr = (struct port100_tg_comm_rf_res *)resp->data;
  1088. status = le32_to_cpu(hdr->status);
  1089. if (cb_arg->mdaa &&
  1090. !port100_tg_target_activated(dev, hdr->target_activated)) {
  1091. kfree_skb(resp);
  1092. resp = ERR_PTR(-ETIMEDOUT);
  1093. goto exit;
  1094. }
  1095. skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
  1096. if (status != PORT100_CMD_STATUS_OK) {
  1097. kfree_skb(resp);
  1098. if (status == PORT100_CMD_STATUS_TIMEOUT)
  1099. resp = ERR_PTR(-ETIMEDOUT);
  1100. else
  1101. resp = ERR_PTR(-EIO);
  1102. }
  1103. exit:
  1104. cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
  1105. kfree(cb_arg);
  1106. }
  1107. static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
  1108. struct sk_buff *skb, u16 timeout,
  1109. nfc_digital_cmd_complete_t cb, void *arg)
  1110. {
  1111. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  1112. struct port100_tg_comm_rf_cmd *hdr;
  1113. struct port100_cb_arg *cb_arg;
  1114. cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
  1115. if (!cb_arg)
  1116. return -ENOMEM;
  1117. cb_arg->complete_cb = cb;
  1118. cb_arg->complete_arg = arg;
  1119. skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
  1120. hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
  1121. memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
  1122. hdr->guard_time = cpu_to_le16(500);
  1123. hdr->send_timeout = cpu_to_le16(0xFFFF);
  1124. hdr->recv_timeout = cpu_to_le16(timeout);
  1125. return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
  1126. port100_tg_comm_rf_complete, cb_arg);
  1127. }
  1128. static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
  1129. struct digital_tg_mdaa_params *params,
  1130. u16 timeout,
  1131. nfc_digital_cmd_complete_t cb, void *arg)
  1132. {
  1133. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  1134. struct port100_tg_comm_rf_cmd *hdr;
  1135. struct port100_cb_arg *cb_arg;
  1136. struct sk_buff *skb;
  1137. int rc;
  1138. rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
  1139. NFC_DIGITAL_RF_TECH_106A);
  1140. if (rc)
  1141. return rc;
  1142. rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
  1143. NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
  1144. if (rc)
  1145. return rc;
  1146. cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
  1147. if (!cb_arg)
  1148. return -ENOMEM;
  1149. cb_arg->complete_cb = cb;
  1150. cb_arg->complete_arg = arg;
  1151. cb_arg->mdaa = 1;
  1152. skb = port100_alloc_skb(dev, 0);
  1153. if (!skb) {
  1154. kfree(cb_arg);
  1155. return -ENOMEM;
  1156. }
  1157. skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
  1158. hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
  1159. memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
  1160. hdr->guard_time = 0;
  1161. hdr->send_timeout = cpu_to_le16(0xFFFF);
  1162. hdr->mdaa = 1;
  1163. hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
  1164. hdr->nfca_param[1] = params->sens_res & 0xFF;
  1165. memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
  1166. hdr->nfca_param[5] = params->sel_res;
  1167. memcpy(hdr->nfcf_param, params->nfcid2, 8);
  1168. hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
  1169. hdr->nfcf_param[17] = params->sc & 0xFF;
  1170. hdr->recv_timeout = cpu_to_le16(timeout);
  1171. return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
  1172. port100_tg_comm_rf_complete, cb_arg);
  1173. }
  1174. static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
  1175. nfc_digital_cmd_complete_t cb, void *arg)
  1176. {
  1177. struct port100 *dev = nfc_digital_get_drvdata(ddev);
  1178. struct sk_buff *skb;
  1179. skb = port100_alloc_skb(dev, 0);
  1180. if (!skb)
  1181. return -ENOMEM;
  1182. return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
  1183. }
  1184. static struct nfc_digital_ops port100_digital_ops = {
  1185. .in_configure_hw = port100_in_configure_hw,
  1186. .in_send_cmd = port100_in_send_cmd,
  1187. .tg_listen_mdaa = port100_listen_mdaa,
  1188. .tg_listen = port100_listen,
  1189. .tg_configure_hw = port100_tg_configure_hw,
  1190. .tg_send_cmd = port100_tg_send_cmd,
  1191. .switch_rf = port100_switch_rf,
  1192. .abort_cmd = port100_abort_cmd,
  1193. };
  1194. static const struct usb_device_id port100_table[] = {
  1195. { USB_DEVICE(SONY_VENDOR_ID, RCS380S_PRODUCT_ID), },
  1196. { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID), },
  1197. { }
  1198. };
  1199. MODULE_DEVICE_TABLE(usb, port100_table);
  1200. static int port100_probe(struct usb_interface *interface,
  1201. const struct usb_device_id *id)
  1202. {
  1203. struct port100 *dev;
  1204. int rc;
  1205. struct usb_host_interface *iface_desc;
  1206. struct usb_endpoint_descriptor *endpoint;
  1207. int in_endpoint;
  1208. int out_endpoint;
  1209. u16 fw_version;
  1210. u64 cmd_type_mask;
  1211. int i;
  1212. dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
  1213. if (!dev)
  1214. return -ENOMEM;
  1215. mutex_init(&dev->out_urb_lock);
  1216. dev->udev = usb_get_dev(interface_to_usbdev(interface));
  1217. dev->interface = interface;
  1218. usb_set_intfdata(interface, dev);
  1219. in_endpoint = out_endpoint = 0;
  1220. iface_desc = interface->cur_altsetting;
  1221. for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
  1222. endpoint = &iface_desc->endpoint[i].desc;
  1223. if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
  1224. in_endpoint = endpoint->bEndpointAddress;
  1225. if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
  1226. out_endpoint = endpoint->bEndpointAddress;
  1227. }
  1228. if (!in_endpoint || !out_endpoint) {
  1229. nfc_err(&interface->dev,
  1230. "Could not find bulk-in or bulk-out endpoint\n");
  1231. rc = -ENODEV;
  1232. goto error;
  1233. }
  1234. dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
  1235. dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
  1236. if (!dev->in_urb || !dev->out_urb) {
  1237. nfc_err(&interface->dev, "Could not allocate USB URBs\n");
  1238. rc = -ENOMEM;
  1239. goto error;
  1240. }
  1241. usb_fill_bulk_urb(dev->in_urb, dev->udev,
  1242. usb_rcvbulkpipe(dev->udev, in_endpoint),
  1243. NULL, 0, NULL, dev);
  1244. usb_fill_bulk_urb(dev->out_urb, dev->udev,
  1245. usb_sndbulkpipe(dev->udev, out_endpoint),
  1246. NULL, 0, port100_send_complete, dev);
  1247. dev->out_urb->transfer_flags = URB_ZERO_PACKET;
  1248. dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
  1249. PORT100_COMM_RF_HEAD_MAX_LEN;
  1250. dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
  1251. init_completion(&dev->cmd_cancel_done);
  1252. INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
  1253. /* The first thing to do with the Port-100 is to set the command type
  1254. * to be used. If supported we use command type 1. 0 otherwise.
  1255. */
  1256. cmd_type_mask = port100_get_command_type_mask(dev);
  1257. if (!cmd_type_mask) {
  1258. nfc_err(&interface->dev,
  1259. "Could not get supported command types\n");
  1260. rc = -ENODEV;
  1261. goto error;
  1262. }
  1263. if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
  1264. dev->cmd_type = PORT100_CMD_TYPE_1;
  1265. else
  1266. dev->cmd_type = PORT100_CMD_TYPE_0;
  1267. rc = port100_set_command_type(dev, dev->cmd_type);
  1268. if (rc) {
  1269. nfc_err(&interface->dev,
  1270. "The device does not support command type %u\n",
  1271. dev->cmd_type);
  1272. goto error;
  1273. }
  1274. fw_version = port100_get_firmware_version(dev);
  1275. if (!fw_version)
  1276. nfc_err(&interface->dev,
  1277. "Could not get device firmware version\n");
  1278. nfc_info(&interface->dev,
  1279. "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
  1280. (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
  1281. dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
  1282. PORT100_PROTOCOLS,
  1283. PORT100_CAPABILITIES,
  1284. dev->skb_headroom,
  1285. dev->skb_tailroom);
  1286. if (!dev->nfc_digital_dev) {
  1287. nfc_err(&interface->dev,
  1288. "Could not allocate nfc_digital_dev\n");
  1289. rc = -ENOMEM;
  1290. goto error;
  1291. }
  1292. nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
  1293. nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
  1294. rc = nfc_digital_register_device(dev->nfc_digital_dev);
  1295. if (rc) {
  1296. nfc_err(&interface->dev,
  1297. "Could not register digital device\n");
  1298. goto free_nfc_dev;
  1299. }
  1300. return 0;
  1301. free_nfc_dev:
  1302. nfc_digital_free_device(dev->nfc_digital_dev);
  1303. error:
  1304. usb_kill_urb(dev->in_urb);
  1305. usb_free_urb(dev->in_urb);
  1306. usb_kill_urb(dev->out_urb);
  1307. usb_free_urb(dev->out_urb);
  1308. usb_put_dev(dev->udev);
  1309. return rc;
  1310. }
  1311. static void port100_disconnect(struct usb_interface *interface)
  1312. {
  1313. struct port100 *dev;
  1314. dev = usb_get_intfdata(interface);
  1315. usb_set_intfdata(interface, NULL);
  1316. nfc_digital_unregister_device(dev->nfc_digital_dev);
  1317. nfc_digital_free_device(dev->nfc_digital_dev);
  1318. usb_kill_urb(dev->in_urb);
  1319. usb_kill_urb(dev->out_urb);
  1320. usb_free_urb(dev->in_urb);
  1321. usb_free_urb(dev->out_urb);
  1322. usb_put_dev(dev->udev);
  1323. kfree(dev->cmd);
  1324. nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n");
  1325. }
  1326. static struct usb_driver port100_driver = {
  1327. .name = "port100",
  1328. .probe = port100_probe,
  1329. .disconnect = port100_disconnect,
  1330. .id_table = port100_table,
  1331. };
  1332. module_usb_driver(port100_driver);
  1333. MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
  1334. MODULE_VERSION(VERSION);
  1335. MODULE_LICENSE("GPL");