1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * The NFC Controller Interface is the communication protocol between an 4 * NFC Controller (NFCC) and a Device Host (DH). 5 * 6 * Copyright (C) 2011 Texas Instruments, Inc. 7 * Copyright (C) 2013 Intel Corporation. All rights reserved. 8 * Copyright (C) 2014 Marvell International Ltd. 9 * 10 * Written by Ilan Elias <ilane@ti.com> 11 * 12 * Acknowledgements: 13 * This file is based on hci_core.h, which was written 14 * by Maxim Krasnyansky. 15 */ 16 17#ifndef __NCI_CORE_H 18#define __NCI_CORE_H 19 20#include <linux/interrupt.h> 21#include <linux/skbuff.h> 22#include <linux/tty.h> 23 24#include <net/nfc/nfc.h> 25#include <net/nfc/nci.h> 26 27/* NCI device flags */ 28enum nci_flag { 29 NCI_INIT, 30 NCI_UP, 31 NCI_DATA_EXCHANGE, 32 NCI_DATA_EXCHANGE_TO, 33 NCI_UNREG, 34}; 35 36/* NCI device states */ 37enum nci_state { 38 NCI_IDLE, 39 NCI_DISCOVERY, 40 NCI_W4_ALL_DISCOVERIES, 41 NCI_W4_HOST_SELECT, 42 NCI_POLL_ACTIVE, 43 NCI_LISTEN_ACTIVE, 44 NCI_LISTEN_SLEEP, 45}; 46 47/* NCI timeouts */ 48#define NCI_RESET_TIMEOUT 5000 49#define NCI_INIT_TIMEOUT 5000 50#define NCI_SET_CONFIG_TIMEOUT 5000 51#define NCI_RF_DISC_TIMEOUT 5000 52#define NCI_RF_DISC_SELECT_TIMEOUT 5000 53#define NCI_RF_DEACTIVATE_TIMEOUT 30000 54#define NCI_CMD_TIMEOUT 5000 55#define NCI_DATA_TIMEOUT 700 56 57struct nci_dev; 58 59struct nci_driver_ops { 60 __u16 opcode; 61 int (*rsp)(struct nci_dev *dev, struct sk_buff *skb); 62 int (*ntf)(struct nci_dev *dev, struct sk_buff *skb); 63}; 64 65struct nci_ops { 66 int (*init)(struct nci_dev *ndev); 67 int (*open)(struct nci_dev *ndev); 68 int (*close)(struct nci_dev *ndev); 69 int (*send)(struct nci_dev *ndev, struct sk_buff *skb); 70 int (*setup)(struct nci_dev *ndev); 71 int (*post_setup)(struct nci_dev *ndev); 72 int (*fw_download)(struct nci_dev *ndev, const char *firmware_name); 73 __u32 (*get_rfprotocol)(struct nci_dev *ndev, __u8 rf_protocol); 74 int (*discover_se)(struct nci_dev *ndev); 75 int (*disable_se)(struct nci_dev *ndev, u32 se_idx); 76 int (*enable_se)(struct nci_dev *ndev, u32 se_idx); 77 int (*se_io)(struct nci_dev *ndev, u32 se_idx, 78 u8 *apdu, size_t apdu_length, 79 se_io_cb_t cb, void *cb_context); 80 int (*hci_load_session)(struct nci_dev *ndev); 81 void (*hci_event_received)(struct nci_dev *ndev, u8 pipe, u8 event, 82 struct sk_buff *skb); 83 void (*hci_cmd_received)(struct nci_dev *ndev, u8 pipe, u8 cmd, 84 struct sk_buff *skb); 85 86 const struct nci_driver_ops *prop_ops; 87 size_t n_prop_ops; 88 89 const struct nci_driver_ops *core_ops; 90 size_t n_core_ops; 91}; 92 93#define NCI_MAX_SUPPORTED_RF_INTERFACES 4 94#define NCI_MAX_DISCOVERED_TARGETS 10 95#define NCI_MAX_NUM_NFCEE 255 96#define NCI_MAX_CONN_ID 7 97#define NCI_MAX_PROPRIETARY_CMD 64 98 99struct nci_conn_info { 100 struct list_head list; 101 /* NCI specification 4.4.2 Connection Creation 102 * The combination of destination type and destination specific 103 * parameters shall uniquely identify a single destination for the 104 * Logical Connection 105 */ 106 struct dest_spec_params *dest_params; 107 __u8 dest_type; 108 __u8 conn_id; 109 __u8 max_pkt_payload_len; 110 111 atomic_t credits_cnt; 112 __u8 initial_num_credits; 113 114 data_exchange_cb_t data_exchange_cb; 115 void *data_exchange_cb_context; 116 117 struct sk_buff *rx_skb; 118}; 119 120#define NCI_INVALID_CONN_ID 0x80 121 122#define NCI_HCI_ANY_OPEN_PIPE 0x03 123 124/* Gates */ 125#define NCI_HCI_ADMIN_GATE 0x00 126#define NCI_HCI_LOOPBACK_GATE 0x04 127#define NCI_HCI_IDENTITY_MGMT_GATE 0x05 128#define NCI_HCI_LINK_MGMT_GATE 0x06 129 130/* Pipes */ 131#define NCI_HCI_LINK_MGMT_PIPE 0x00 132#define NCI_HCI_ADMIN_PIPE 0x01 133 134/* Generic responses */ 135#define NCI_HCI_ANY_OK 0x00 136#define NCI_HCI_ANY_E_NOT_CONNECTED 0x01 137#define NCI_HCI_ANY_E_CMD_PAR_UNKNOWN 0x02 138#define NCI_HCI_ANY_E_NOK 0x03 139#define NCI_HCI_ANY_E_PIPES_FULL 0x04 140#define NCI_HCI_ANY_E_REG_PAR_UNKNOWN 0x05 141#define NCI_HCI_ANY_E_PIPE_NOT_OPENED 0x06 142#define NCI_HCI_ANY_E_CMD_NOT_SUPPORTED 0x07 143#define NCI_HCI_ANY_E_INHIBITED 0x08 144#define NCI_HCI_ANY_E_TIMEOUT 0x09 145#define NCI_HCI_ANY_E_REG_ACCESS_DENIED 0x0a 146#define NCI_HCI_ANY_E_PIPE_ACCESS_DENIED 0x0b 147 148#define NCI_HCI_DO_NOT_OPEN_PIPE 0x81 149#define NCI_HCI_INVALID_PIPE 0x80 150#define NCI_HCI_INVALID_GATE 0xFF 151#define NCI_HCI_INVALID_HOST 0x80 152 153#define NCI_HCI_MAX_CUSTOM_GATES 50 154/* 155 * According to specification 102 622 chapter 4.4 Pipes, 156 * the pipe identifier is 7 bits long. 157 */ 158#define NCI_HCI_MAX_PIPES 128 159 160struct nci_hci_gate { 161 u8 gate; 162 u8 pipe; 163 u8 dest_host; 164} __packed; 165 166struct nci_hci_pipe { 167 u8 gate; 168 u8 host; 169} __packed; 170 171struct nci_hci_init_data { 172 u8 gate_count; 173 struct nci_hci_gate gates[NCI_HCI_MAX_CUSTOM_GATES]; 174 char session_id[9]; 175}; 176 177#define NCI_HCI_MAX_GATES 256 178 179struct nci_hci_dev { 180 u8 nfcee_id; 181 struct nci_dev *ndev; 182 struct nci_conn_info *conn_info; 183 184 struct nci_hci_init_data init_data; 185 struct nci_hci_pipe pipes[NCI_HCI_MAX_PIPES]; 186 u8 gate2pipe[NCI_HCI_MAX_GATES]; 187 int expected_pipes; 188 int count_pipes; 189 190 struct sk_buff_head rx_hcp_frags; 191 struct work_struct msg_rx_work; 192 struct sk_buff_head msg_rx_queue; 193}; 194 195/* NCI Core structures */ 196struct nci_dev { 197 struct nfc_dev *nfc_dev; 198 const struct nci_ops *ops; 199 struct nci_hci_dev *hci_dev; 200 201 int tx_headroom; 202 int tx_tailroom; 203 204 atomic_t state; 205 unsigned long flags; 206 207 atomic_t cmd_cnt; 208 __u8 cur_conn_id; 209 210 struct list_head conn_info_list; 211 struct nci_conn_info *rf_conn_info; 212 213 struct timer_list cmd_timer; 214 struct timer_list data_timer; 215 216 struct workqueue_struct *cmd_wq; 217 struct work_struct cmd_work; 218 219 struct workqueue_struct *rx_wq; 220 struct work_struct rx_work; 221 222 struct workqueue_struct *tx_wq; 223 struct work_struct tx_work; 224 225 struct sk_buff_head cmd_q; 226 struct sk_buff_head rx_q; 227 struct sk_buff_head tx_q; 228 229 struct mutex req_lock; 230 struct completion req_completion; 231 __u32 req_status; 232 __u32 req_result; 233 234 void *driver_data; 235 236 __u32 poll_prots; 237 __u32 target_active_prot; 238 239 struct nfc_target targets[NCI_MAX_DISCOVERED_TARGETS]; 240 int n_targets; 241 242 /* received during NCI_OP_CORE_RESET_RSP */ 243 __u8 nci_ver; 244 245 /* received during NCI_OP_CORE_INIT_RSP */ 246 __u32 nfcc_features; 247 __u8 num_supported_rf_interfaces; 248 __u8 supported_rf_interfaces 249 [NCI_MAX_SUPPORTED_RF_INTERFACES]; 250 __u8 max_logical_connections; 251 __u16 max_routing_table_size; 252 __u8 max_ctrl_pkt_payload_len; 253 __u16 max_size_for_large_params; 254 __u8 manufact_id; 255 __u32 manufact_specific_info; 256 257 /* Save RF Discovery ID or NFCEE ID under conn_create */ 258 struct dest_spec_params cur_params; 259 /* Save destination type under conn_create */ 260 __u8 cur_dest_type; 261 262 /* stored during nci_data_exchange */ 263 struct sk_buff *rx_data_reassembly; 264 265 /* stored during intf_activated_ntf */ 266 __u8 remote_gb[NFC_MAX_GT_LEN]; 267 __u8 remote_gb_len; 268}; 269 270/* ----- NCI Devices ----- */ 271struct nci_dev *nci_allocate_device(const struct nci_ops *ops, 272 __u32 supported_protocols, 273 int tx_headroom, 274 int tx_tailroom); 275void nci_free_device(struct nci_dev *ndev); 276int nci_register_device(struct nci_dev *ndev); 277void nci_unregister_device(struct nci_dev *ndev); 278int nci_request(struct nci_dev *ndev, 279 void (*req)(struct nci_dev *ndev, 280 const void *opt), 281 const void *opt, __u32 timeout); 282int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, 283 const __u8 *payload); 284int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, 285 const __u8 *payload); 286int nci_core_reset(struct nci_dev *ndev); 287int nci_core_init(struct nci_dev *ndev); 288 289int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb); 290int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb); 291int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val); 292 293int nci_nfcee_discover(struct nci_dev *ndev, u8 action); 294int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode); 295int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type, 296 u8 number_destination_params, 297 size_t params_len, 298 const struct core_conn_create_dest_spec_params *params); 299int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id); 300int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len, 301 struct sk_buff **resp); 302 303struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev); 304void nci_hci_deallocate(struct nci_dev *ndev); 305int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event, 306 const u8 *param, size_t param_len); 307int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, 308 u8 cmd, const u8 *param, size_t param_len, 309 struct sk_buff **skb); 310int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe); 311int nci_hci_connect_gate(struct nci_dev *ndev, u8 dest_host, 312 u8 dest_gate, u8 pipe); 313int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx, 314 const u8 *param, size_t param_len); 315int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx, 316 struct sk_buff **skb); 317int nci_hci_clear_all_pipes(struct nci_dev *ndev); 318int nci_hci_dev_session_init(struct nci_dev *ndev); 319 320static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev, 321 unsigned int len, 322 gfp_t how) 323{ 324 struct sk_buff *skb; 325 326 skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how); 327 if (skb) 328 skb_reserve(skb, ndev->tx_headroom); 329 330 return skb; 331} 332 333static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev) 334{ 335 nfc_set_parent_dev(ndev->nfc_dev, dev); 336} 337 338static inline void nci_set_drvdata(struct nci_dev *ndev, void *data) 339{ 340 ndev->driver_data = data; 341} 342 343static inline void *nci_get_drvdata(struct nci_dev *ndev) 344{ 345 return ndev->driver_data; 346} 347 348static inline int nci_set_vendor_cmds(struct nci_dev *ndev, 349 const struct nfc_vendor_cmd *cmds, 350 int n_cmds) 351{ 352 return nfc_set_vendor_cmds(ndev->nfc_dev, cmds, n_cmds); 353} 354 355void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb); 356void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb); 357int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode, 358 struct sk_buff *skb); 359int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode, 360 struct sk_buff *skb); 361int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode, 362 struct sk_buff *skb); 363int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode, 364 struct sk_buff *skb); 365void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb); 366int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, const void *payload); 367int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb); 368int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id); 369void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb, 370 __u8 conn_id, int err); 371void nci_hci_data_received_cb(void *context, struct sk_buff *skb, int err); 372 373void nci_clear_target_list(struct nci_dev *ndev); 374 375/* ----- NCI requests ----- */ 376#define NCI_REQ_DONE 0 377#define NCI_REQ_PEND 1 378#define NCI_REQ_CANCELED 2 379 380void nci_req_complete(struct nci_dev *ndev, int result); 381struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev, 382 int conn_id); 383int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type, 384 const struct dest_spec_params *params); 385 386/* ----- NCI status code ----- */ 387int nci_to_errno(__u8 code); 388 389/* ----- NCI over SPI acknowledge modes ----- */ 390#define NCI_SPI_CRC_DISABLED 0x00 391#define NCI_SPI_CRC_ENABLED 0x01 392 393/* ----- NCI SPI structures ----- */ 394struct nci_spi { 395 struct nci_dev *ndev; 396 struct spi_device *spi; 397 398 unsigned int xfer_udelay; /* microseconds delay between 399 transactions */ 400 401 unsigned int xfer_speed_hz; /* 402 * SPI clock frequency 403 * 0 => default clock 404 */ 405 406 u8 acknowledge_mode; 407 408 struct completion req_completion; 409 u8 req_result; 410}; 411 412/* ----- NCI SPI ----- */ 413struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi, 414 u8 acknowledge_mode, unsigned int delay, 415 struct nci_dev *ndev); 416int nci_spi_send(struct nci_spi *nspi, 417 struct completion *write_handshake_completion, 418 struct sk_buff *skb); 419struct sk_buff *nci_spi_read(struct nci_spi *nspi); 420 421/* ----- NCI UART ---- */ 422 423/* Ioctl */ 424#define NCIUARTSETDRIVER _IOW('U', 0, char *) 425 426enum nci_uart_driver { 427 NCI_UART_DRIVER_MARVELL = 0, 428 NCI_UART_DRIVER_MAX 429}; 430 431struct nci_uart; 432 433struct nci_uart_ops { 434 int (*open)(struct nci_uart *nci_uart); 435 void (*close)(struct nci_uart *nci_uart); 436 int (*recv)(struct nci_uart *nci_uart, struct sk_buff *skb); 437 int (*send)(struct nci_uart *nci_uart, struct sk_buff *skb); 438 void (*tx_start)(struct nci_uart *nci_uart); 439 void (*tx_done)(struct nci_uart *nci_uart); 440}; 441 442struct nci_uart { 443 struct module *owner; 444 struct nci_uart_ops ops; 445 const char *name; 446 enum nci_uart_driver driver; 447 448 /* Dynamic data */ 449 struct nci_dev *ndev; 450 spinlock_t rx_lock; 451 struct work_struct write_work; 452 struct tty_struct *tty; 453 unsigned long tx_state; 454 struct sk_buff_head tx_q; 455 struct sk_buff *tx_skb; 456 struct sk_buff *rx_skb; 457 int rx_packet_len; 458 void *drv_data; 459}; 460 461int nci_uart_register(struct nci_uart *nu); 462void nci_uart_unregister(struct nci_uart *nu); 463void nci_uart_set_config(struct nci_uart *nu, int baudrate, int flow_ctrl); 464 465#endif /* __NCI_CORE_H */ 466