include/net/nfc/nci_core.h

   1 /*
   2  *  The NFC Controller Interface is the communication protocol between an
   3  *  NFC Controller (NFCC) and a Device Host (DH).
   4  *
   5  *  Copyright (C) 2011 Texas Instruments, Inc.
   6  *  Copyright (C) 2013 Intel Corporation. All rights reserved.
   7  *  Copyright (C) 2014 Marvell International Ltd.
   8  *
   9  *  Written by Ilan Elias <ilane@ti.com>
  10  *
  11  *  Acknowledgements:
  12  *  This file is based on hci_core.h, which was written
  13  *  by Maxim Krasnyansky.
  14  *
  15  *  This program is free software; you can redistribute it and/or modify
  16  *  it under the terms of the GNU General Public License version 2
  17  *  as published by the Free Software Foundation
  18  *
  19  *  This program is distributed in the hope that it will be useful,
  20  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *  GNU General Public License for more details.
  23  *
  24  *  You should have received a copy of the GNU General Public License
  25  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  26  *
  27  */
  28
  29 #ifndef __NCI_CORE_H
  30 #define __NCI_CORE_H
  31
  32 #include <linux/interrupt.h>
  33 #include <linux/skbuff.h>
  34 #include <linux/tty.h>
  35
  36 #include <net/nfc/nfc.h>
  37 #include <net/nfc/nci.h>
  38
  39 /* NCI device flags */
  40 enum nci_flag {
  41         NCI_INIT,
  42         NCI_UP,
  43         NCI_DATA_EXCHANGE,
  44         NCI_DATA_EXCHANGE_TO,
  45 };
  46
  47 /* NCI device states */
  48 enum nci_state {
  49         NCI_IDLE,
  50         NCI_DISCOVERY,
  51         NCI_W4_ALL_DISCOVERIES,
  52         NCI_W4_HOST_SELECT,
  53         NCI_POLL_ACTIVE,
  54         NCI_LISTEN_ACTIVE,
  55         NCI_LISTEN_SLEEP,
  56 };
  57
  58 /* NCI timeouts */
  59 #define NCI_RESET_TIMEOUT                       5000
  60 #define NCI_INIT_TIMEOUT                        5000
  61 #define NCI_SET_CONFIG_TIMEOUT                  5000
  62 #define NCI_RF_DISC_TIMEOUT                     5000
  63 #define NCI_RF_DISC_SELECT_TIMEOUT              5000
  64 #define NCI_RF_DEACTIVATE_TIMEOUT               30000
  65 #define NCI_CMD_TIMEOUT                         5000
  66 #define NCI_DATA_TIMEOUT                        700
  67
  68 struct nci_dev;
  69
  70 struct nci_driver_ops {
  71         __u16 opcode;
  72         int (*rsp)(struct nci_dev *dev, struct sk_buff *skb);
  73         int (*ntf)(struct nci_dev *dev, struct sk_buff *skb);
  74 };
  75
  76 struct nci_ops {
  77         int   (*init)(struct nci_dev *ndev);
  78         int   (*open)(struct nci_dev *ndev);
  79         int   (*close)(struct nci_dev *ndev);
  80         int   (*send)(struct nci_dev *ndev, struct sk_buff *skb);
  81         int   (*setup)(struct nci_dev *ndev);
  82         int   (*post_setup)(struct nci_dev *ndev);
  83         int   (*fw_download)(struct nci_dev *ndev, const char *firmware_name);
  84         __u32 (*get_rfprotocol)(struct nci_dev *ndev, __u8 rf_protocol);
  85         int   (*discover_se)(struct nci_dev *ndev);
  86         int   (*disable_se)(struct nci_dev *ndev, u32 se_idx);
  87         int   (*enable_se)(struct nci_dev *ndev, u32 se_idx);
  88         int   (*se_io)(struct nci_dev *ndev, u32 se_idx,
  89                                 u8 *apdu, size_t apdu_length,
  90                                 se_io_cb_t cb, void *cb_context);
  91         int   (*hci_load_session)(struct nci_dev *ndev);
  92         void  (*hci_event_received)(struct nci_dev *ndev, u8 pipe, u8 event,
  93                                     struct sk_buff *skb);
  94         void  (*hci_cmd_received)(struct nci_dev *ndev, u8 pipe, u8 cmd,
  95                                   struct sk_buff *skb);
  96
  97         struct nci_driver_ops *prop_ops;
  98         size_t n_prop_ops;
  99
 100         struct nci_driver_ops *core_ops;
 101         size_t n_core_ops;
 102 };
 103
 104 #define NCI_MAX_SUPPORTED_RF_INTERFACES         4
 105 #define NCI_MAX_DISCOVERED_TARGETS              10
 106 #define NCI_MAX_NUM_NFCEE   255
 107 #define NCI_MAX_CONN_ID         7
 108 #define NCI_MAX_PROPRIETARY_CMD 64
 109
 110 struct nci_conn_info {
 111         struct list_head list;
 112         /* NCI specification 4.4.2 Connection Creation
 113          * The combination of destination type and destination specific
 114          * parameters shall uniquely identify a single destination for the
 115          * Logical Connection
 116          */
 117         struct dest_spec_params *dest_params;
 118         __u8    dest_type;
 119         __u8    conn_id;
 120         __u8    max_pkt_payload_len;
 121
 122         atomic_t credits_cnt;
 123         __u8     initial_num_credits;
 124
 125         data_exchange_cb_t      data_exchange_cb;
 126         void *data_exchange_cb_context;
 127
 128         struct sk_buff *rx_skb;
 129 };
 130
 131 #define NCI_INVALID_CONN_ID 0x80
 132
 133 #define NCI_HCI_ANY_OPEN_PIPE      0x03
 134
 135 /* Gates */
 136 #define NCI_HCI_ADMIN_GATE         0x00
 137 #define NCI_HCI_LOOPBACK_GATE      0x04
 138 #define NCI_HCI_IDENTITY_MGMT_GATE 0x05
 139 #define NCI_HCI_LINK_MGMT_GATE     0x06
 140
 141 /* Pipes */
 142 #define NCI_HCI_LINK_MGMT_PIPE             0x00
 143 #define NCI_HCI_ADMIN_PIPE                 0x01
 144
 145 /* Generic responses */
 146 #define NCI_HCI_ANY_OK                     0x00
 147 #define NCI_HCI_ANY_E_NOT_CONNECTED        0x01
 148 #define NCI_HCI_ANY_E_CMD_PAR_UNKNOWN      0x02
 149 #define NCI_HCI_ANY_E_NOK                  0x03
 150 #define NCI_HCI_ANY_E_PIPES_FULL           0x04
 151 #define NCI_HCI_ANY_E_REG_PAR_UNKNOWN      0x05
 152 #define NCI_HCI_ANY_E_PIPE_NOT_OPENED      0x06
 153 #define NCI_HCI_ANY_E_CMD_NOT_SUPPORTED    0x07
 154 #define NCI_HCI_ANY_E_INHIBITED            0x08
 155 #define NCI_HCI_ANY_E_TIMEOUT              0x09
 156 #define NCI_HCI_ANY_E_REG_ACCESS_DENIED    0x0a
 157 #define NCI_HCI_ANY_E_PIPE_ACCESS_DENIED   0x0b
 158
 159 #define NCI_HCI_DO_NOT_OPEN_PIPE           0x81
 160 #define NCI_HCI_INVALID_PIPE               0x80
 161 #define NCI_HCI_INVALID_GATE               0xFF
 162 #define NCI_HCI_INVALID_HOST               0x80
 163
 164 #define NCI_HCI_MAX_CUSTOM_GATES   50
 165 /*
 166  * According to specification 102 622 chapter 4.4 Pipes,
 167  * the pipe identifier is 7 bits long.
 168  */
 169 #define NCI_HCI_MAX_PIPES          127
 170
 171 struct nci_hci_gate {
 172         u8 gate;
 173         u8 pipe;
 174         u8 dest_host;
 175 } __packed;
 176
 177 struct nci_hci_pipe {
 178         u8 gate;
 179         u8 host;
 180 } __packed;
 181
 182 struct nci_hci_init_data {
 183         u8 gate_count;
 184         struct nci_hci_gate gates[NCI_HCI_MAX_CUSTOM_GATES];
 185         char session_id[9];
 186 };
 187
 188 #define NCI_HCI_MAX_GATES          256
 189
 190 struct nci_hci_dev {
 191         u8 nfcee_id;
 192         struct nci_dev *ndev;
 193         struct nci_conn_info *conn_info;
 194
 195         struct nci_hci_init_data init_data;
 196         struct nci_hci_pipe pipes[NCI_HCI_MAX_PIPES];
 197         u8 gate2pipe[NCI_HCI_MAX_GATES];
 198         int expected_pipes;
 199         int count_pipes;
 200
 201         struct sk_buff_head rx_hcp_frags;
 202         struct work_struct msg_rx_work;
 203         struct sk_buff_head msg_rx_queue;
 204 };
 205
 206 /* NCI Core structures */
 207 struct nci_dev {
 208         struct nfc_dev          *nfc_dev;
 209         struct nci_ops          *ops;
 210         struct nci_hci_dev      *hci_dev;
 211
 212         int                     tx_headroom;
 213         int                     tx_tailroom;
 214
 215         atomic_t                state;
 216         unsigned long           flags;
 217
 218         atomic_t                cmd_cnt;
 219         __u8                    cur_conn_id;
 220
 221         struct list_head        conn_info_list;
 222         struct nci_conn_info    *rf_conn_info;
 223
 224         struct timer_list       cmd_timer;
 225         struct timer_list       data_timer;
 226
 227         struct workqueue_struct *cmd_wq;
 228         struct work_struct      cmd_work;
 229
 230         struct workqueue_struct *rx_wq;
 231         struct work_struct      rx_work;
 232
 233         struct workqueue_struct *tx_wq;
 234         struct work_struct      tx_work;
 235
 236         struct sk_buff_head     cmd_q;
 237         struct sk_buff_head     rx_q;
 238         struct sk_buff_head     tx_q;
 239
 240         struct mutex            req_lock;
 241         struct completion       req_completion;
 242         __u32                   req_status;
 243         __u32                   req_result;
 244
 245         void                    *driver_data;
 246
 247         __u32                   poll_prots;
 248         __u32                   target_active_prot;
 249
 250         struct nfc_target       targets[NCI_MAX_DISCOVERED_TARGETS];
 251         int                     n_targets;
 252
 253         /* received during NCI_OP_CORE_RESET_RSP */
 254         __u8                    nci_ver;
 255
 256         /* received during NCI_OP_CORE_INIT_RSP */
 257         __u32                   nfcc_features;
 258         __u8                    num_supported_rf_interfaces;
 259         __u8                    supported_rf_interfaces
 260                                 [NCI_MAX_SUPPORTED_RF_INTERFACES];
 261         __u8                    max_logical_connections;
 262         __u16                   max_routing_table_size;
 263         __u8                    max_ctrl_pkt_payload_len;
 264         __u16                   max_size_for_large_params;
 265         __u8                    manufact_id;
 266         __u32                   manufact_specific_info;
 267
 268         /* Save RF Discovery ID or NFCEE ID under conn_create */
 269         struct dest_spec_params cur_params;
 270         /* Save destination type under conn_create */
 271         __u8                    cur_dest_type;
 272
 273         /* stored during nci_data_exchange */
 274         struct sk_buff          *rx_data_reassembly;
 275
 276         /* stored during intf_activated_ntf */
 277         __u8 remote_gb[NFC_MAX_GT_LEN];
 278         __u8 remote_gb_len;
 279 };
 280
 281 /* ----- NCI Devices ----- */
 282 struct nci_dev *nci_allocate_device(struct nci_ops *ops,
 283                                     __u32 supported_protocols,
 284                                     int tx_headroom,
 285                                     int tx_tailroom);
 286 void nci_free_device(struct nci_dev *ndev);
 287 int nci_register_device(struct nci_dev *ndev);
 288 void nci_unregister_device(struct nci_dev *ndev);
 289 int nci_request(struct nci_dev *ndev,
 290                 void (*req)(struct nci_dev *ndev,
 291                             unsigned long opt),
 292                 unsigned long opt, __u32 timeout);
 293 int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload);
 294 int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload);
 295 int nci_core_reset(struct nci_dev *ndev);
 296 int nci_core_init(struct nci_dev *ndev);
 297
 298 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
 299 int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb);
 300 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val);
 301
 302 int nci_nfcee_discover(struct nci_dev *ndev, u8 action);
 303 int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode);
 304 int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
 305                          u8 number_destination_params,
 306                          size_t params_len,
 307                          struct core_conn_create_dest_spec_params *params);
 308 int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id);
 309 int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
 310                       struct sk_buff **resp);
 311
 312 struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev);
 313 int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event,
 314                        const u8 *param, size_t param_len);
 315 int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate,
 316                      u8 cmd, const u8 *param, size_t param_len,
 317                      struct sk_buff **skb);
 318 int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe);
 319 int nci_hci_connect_gate(struct nci_dev *ndev, u8 dest_host,
 320                          u8 dest_gate, u8 pipe);
 321 int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,
 322                       const u8 *param, size_t param_len);
 323 int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx,
 324                       struct sk_buff **skb);
 325 int nci_hci_clear_all_pipes(struct nci_dev *ndev);
 326 int nci_hci_dev_session_init(struct nci_dev *ndev);
 327
 328 static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
 329                                             unsigned int len,
 330                                             gfp_t how)
 331 {
 332         struct sk_buff *skb;
 333
 334         skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
 335         if (skb)
 336                 skb_reserve(skb, ndev->tx_headroom);
 337
 338         return skb;
 339 }
 340
 341 static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
 342 {
 343         nfc_set_parent_dev(ndev->nfc_dev, dev);
 344 }
 345
 346 static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
 347 {
 348         ndev->driver_data = data;
 349 }
 350
 351 static inline void *nci_get_drvdata(struct nci_dev *ndev)
 352 {
 353         return ndev->driver_data;
 354 }
 355
 356 static inline int nci_set_vendor_cmds(struct nci_dev *ndev,
 357                                       struct nfc_vendor_cmd *cmds,
 358                                       int n_cmds)
 359 {
 360         return nfc_set_vendor_cmds(ndev->nfc_dev, cmds, n_cmds);
 361 }
 362
 363 void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
 364 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
 365 int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
 366                         struct sk_buff *skb);
 367 int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
 368                         struct sk_buff *skb);
 369 int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
 370                         struct sk_buff *skb);
 371 int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
 372                         struct sk_buff *skb);
 373 void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
 374 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
 375 int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
 376 int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id);
 377 void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
 378                                 __u8 conn_id, int err);
 379 void nci_hci_data_received_cb(void *context, struct sk_buff *skb, int err);
 380
 381 void nci_clear_target_list(struct nci_dev *ndev);
 382
 383 /* ----- NCI requests ----- */
 384 #define NCI_REQ_DONE            0
 385 #define NCI_REQ_PEND            1
 386 #define NCI_REQ_CANCELED        2
 387
 388 void nci_req_complete(struct nci_dev *ndev, int result);
 389 struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
 390                                                    int conn_id);
 391 int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
 392                                           struct dest_spec_params *params);
 393
 394 /* ----- NCI status code ----- */
 395 int nci_to_errno(__u8 code);
 396
 397 /* ----- NCI over SPI acknowledge modes ----- */
 398 #define NCI_SPI_CRC_DISABLED    0x00
 399 #define NCI_SPI_CRC_ENABLED     0x01
 400
 401 /* ----- NCI SPI structures ----- */
 402 struct nci_spi {
 403         struct nci_dev          *ndev;
 404         struct spi_device       *spi;
 405
 406         unsigned int            xfer_udelay;    /* microseconds delay between
 407                                                   transactions */
 408
 409         unsigned int            xfer_speed_hz; /*
 410                                                 * SPI clock frequency
 411                                                 * 0 => default clock
 412                                                 */
 413
 414         u8                      acknowledge_mode;
 415
 416         struct completion       req_completion;
 417         u8                      req_result;
 418 };
 419
 420 /* ----- NCI SPI ----- */
 421 struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi,
 422                                      u8 acknowledge_mode, unsigned int delay,
 423                                      struct nci_dev *ndev);
 424 int nci_spi_send(struct nci_spi *nspi,
 425                  struct completion *write_handshake_completion,
 426                  struct sk_buff *skb);
 427 struct sk_buff *nci_spi_read(struct nci_spi *nspi);
 428
 429 /* ----- NCI UART ---- */
 430
 431 /* Ioctl */
 432 #define NCIUARTSETDRIVER        _IOW('U', 0, char *)
 433
 434 enum nci_uart_driver {
 435         NCI_UART_DRIVER_MARVELL = 0,
 436         NCI_UART_DRIVER_MAX
 437 };
 438
 439 struct nci_uart;
 440
 441 struct nci_uart_ops {
 442         int (*open)(struct nci_uart *nci_uart);
 443         void (*close)(struct nci_uart *nci_uart);
 444         int (*recv)(struct nci_uart *nci_uart, struct sk_buff *skb);
 445         int (*recv_buf)(struct nci_uart *nci_uart, const u8 *data, char *flags,
 446                         int count);
 447         int (*send)(struct nci_uart *nci_uart, struct sk_buff *skb);
 448         void (*tx_start)(struct nci_uart *nci_uart);
 449         void (*tx_done)(struct nci_uart *nci_uart);
 450 };
 451
 452 struct nci_uart {
 453         struct module           *owner;
 454         struct nci_uart_ops     ops;
 455         const char              *name;
 456         enum nci_uart_driver    driver;
 457
 458         /* Dynamic data */
 459         struct nci_dev          *ndev;
 460         spinlock_t              rx_lock;
 461         struct work_struct      write_work;
 462         struct tty_struct       *tty;
 463         unsigned long           tx_state;
 464         struct sk_buff_head     tx_q;
 465         struct sk_buff          *tx_skb;
 466         struct sk_buff          *rx_skb;
 467         int                     rx_packet_len;
 468         void                    *drv_data;
 469 };
 470
 471 int nci_uart_register(struct nci_uart *nu);
 472 void nci_uart_unregister(struct nci_uart *nu);
 473 void nci_uart_set_config(struct nci_uart *nu, int baudrate, int flow_ctrl);
 474
 475 #endif /* __NCI_CORE_H */