kernel/include/net/nfc/hci.h

   1 /*
   2  * Copyright (C) 2011  Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __NET_HCI_H
  19 #define __NET_HCI_H
  20
  21 #include <linux/skbuff.h>
  22
  23 #include <net/nfc/nfc.h>
  24
  25 struct nfc_hci_dev;
  26
  27 struct nfc_hci_ops {
  28         int (*open) (struct nfc_hci_dev *hdev);
  29         void (*close) (struct nfc_hci_dev *hdev);
  30         int (*load_session) (struct nfc_hci_dev *hdev);
  31         int (*hci_ready) (struct nfc_hci_dev *hdev);
  32         /*
  33          * xmit must always send the complete buffer before
  34          * returning. Returned result must be 0 for success
  35          * or negative for failure.
  36          */
  37         int (*xmit) (struct nfc_hci_dev *hdev, struct sk_buff *skb);
  38         int (*start_poll) (struct nfc_hci_dev *hdev,
  39                            u32 im_protocols, u32 tm_protocols);
  40         void (*stop_poll) (struct nfc_hci_dev *hdev);
  41         int (*dep_link_up)(struct nfc_hci_dev *hdev, struct nfc_target *target,
  42                            u8 comm_mode, u8 *gb, size_t gb_len);
  43         int (*dep_link_down)(struct nfc_hci_dev *hdev);
  44         int (*target_from_gate) (struct nfc_hci_dev *hdev, u8 gate,
  45                                  struct nfc_target *target);
  46         int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,
  47                                            struct nfc_target *target);
  48         int (*im_transceive) (struct nfc_hci_dev *hdev,
  49                               struct nfc_target *target, struct sk_buff *skb,
  50                               data_exchange_cb_t cb, void *cb_context);
  51         int (*tm_send)(struct nfc_hci_dev *hdev, struct sk_buff *skb);
  52         int (*check_presence)(struct nfc_hci_dev *hdev,
  53                               struct nfc_target *target);
  54         int (*event_received)(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
  55                               struct sk_buff *skb);
  56         void (*cmd_received)(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
  57                             struct sk_buff *skb);
  58         int (*fw_download)(struct nfc_hci_dev *hdev, const char *firmware_name);
  59         int (*discover_se)(struct nfc_hci_dev *dev);
  60         int (*enable_se)(struct nfc_hci_dev *dev, u32 se_idx);
  61         int (*disable_se)(struct nfc_hci_dev *dev, u32 se_idx);
  62         int (*se_io)(struct nfc_hci_dev *dev, u32 se_idx,
  63                       u8 *apdu, size_t apdu_length,
  64                       se_io_cb_t cb, void *cb_context);
  65 };
  66
  67 /* Pipes */
  68 #define NFC_HCI_DO_NOT_CREATE_PIPE      0x81
  69 #define NFC_HCI_INVALID_PIPE    0x80
  70 #define NFC_HCI_INVALID_GATE    0xFF
  71 #define NFC_HCI_INVALID_HOST    0x80
  72 #define NFC_HCI_LINK_MGMT_PIPE  0x00
  73 #define NFC_HCI_ADMIN_PIPE      0x01
  74
  75 struct nfc_hci_gate {
  76         u8 gate;
  77         u8 pipe;
  78 };
  79
  80 struct nfc_hci_pipe {
  81         u8 gate;
  82         u8 dest_host;
  83 };
  84
  85 #define NFC_HCI_MAX_CUSTOM_GATES        50
  86 /*
  87  * According to specification 102 622 chapter 4.4 Pipes,
  88  * the pipe identifier is 7 bits long.
  89  */
  90 #define NFC_HCI_MAX_PIPES               127
  91 struct nfc_hci_init_data {
  92         u8 gate_count;
  93         struct nfc_hci_gate gates[NFC_HCI_MAX_CUSTOM_GATES];
  94         char session_id[9];
  95 };
  96
  97 typedef int (*xmit) (struct sk_buff *skb, void *cb_data);
  98
  99 #define NFC_HCI_MAX_GATES               256
 100
 101 /*
 102  * These values can be specified by a driver to indicate it requires some
 103  * adaptation of the HCI standard.
 104  *
 105  * NFC_HCI_QUIRK_SHORT_CLEAR - send HCI_ADM_CLEAR_ALL_PIPE cmd with no params
 106  */
 107 enum {
 108         NFC_HCI_QUIRK_SHORT_CLEAR       = 0,
 109 };
 110
 111 struct nfc_hci_dev {
 112         struct nfc_dev *ndev;
 113
 114         u32 max_data_link_payload;
 115
 116         bool shutting_down;
 117
 118         struct mutex msg_tx_mutex;
 119
 120         struct list_head msg_tx_queue;
 121
 122         struct work_struct msg_tx_work;
 123
 124         struct timer_list cmd_timer;
 125         struct hci_msg *cmd_pending_msg;
 126
 127         struct sk_buff_head rx_hcp_frags;
 128
 129         struct work_struct msg_rx_work;
 130
 131         struct sk_buff_head msg_rx_queue;
 132
 133         struct nfc_hci_ops *ops;
 134
 135         struct nfc_llc *llc;
 136
 137         struct nfc_hci_init_data init_data;
 138
 139         void *clientdata;
 140
 141         u8 gate2pipe[NFC_HCI_MAX_GATES];
 142         struct nfc_hci_pipe pipes[NFC_HCI_MAX_PIPES];
 143
 144         u8 sw_romlib;
 145         u8 sw_patch;
 146         u8 sw_flashlib_major;
 147         u8 sw_flashlib_minor;
 148
 149         u8 hw_derivative;
 150         u8 hw_version;
 151         u8 hw_mpw;
 152         u8 hw_software;
 153         u8 hw_bsid;
 154
 155         int async_cb_type;
 156         data_exchange_cb_t async_cb;
 157         void *async_cb_context;
 158
 159         u8 *gb;
 160         size_t gb_len;
 161
 162         unsigned long quirks;
 163 };
 164
 165 /* hci device allocation */
 166 struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
 167                                             struct nfc_hci_init_data *init_data,
 168                                             unsigned long quirks,
 169                                             u32 protocols,
 170                                             const char *llc_name,
 171                                             int tx_headroom,
 172                                             int tx_tailroom,
 173                                             int max_link_payload);
 174 void nfc_hci_free_device(struct nfc_hci_dev *hdev);
 175
 176 int nfc_hci_register_device(struct nfc_hci_dev *hdev);
 177 void nfc_hci_unregister_device(struct nfc_hci_dev *hdev);
 178
 179 void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata);
 180 void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev);
 181
 182 void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err);
 183
 184 int nfc_hci_result_to_errno(u8 result);
 185 void nfc_hci_reset_pipes(struct nfc_hci_dev *dev);
 186 void nfc_hci_reset_pipes_per_host(struct nfc_hci_dev *hdev, u8 host);
 187
 188 /* Host IDs */
 189 #define NFC_HCI_HOST_CONTROLLER_ID      0x00
 190 #define NFC_HCI_TERMINAL_HOST_ID        0x01
 191 #define NFC_HCI_UICC_HOST_ID            0x02
 192
 193 /* Host Controller Gates and registry indexes */
 194 #define NFC_HCI_ADMIN_GATE 0x00
 195 #define NFC_HCI_ADMIN_SESSION_IDENTITY  0x01
 196 #define NFC_HCI_ADMIN_MAX_PIPE          0x02
 197 #define NFC_HCI_ADMIN_WHITELIST         0x03
 198 #define NFC_HCI_ADMIN_HOST_LIST         0x04
 199
 200 #define NFC_HCI_LOOPBACK_GATE           0x04
 201
 202 #define NFC_HCI_ID_MGMT_GATE            0x05
 203 #define NFC_HCI_ID_MGMT_VERSION_SW      0x01
 204 #define NFC_HCI_ID_MGMT_VERSION_HW      0x03
 205 #define NFC_HCI_ID_MGMT_VENDOR_NAME     0x04
 206 #define NFC_HCI_ID_MGMT_MODEL_ID        0x05
 207 #define NFC_HCI_ID_MGMT_HCI_VERSION     0x02
 208 #define NFC_HCI_ID_MGMT_GATES_LIST      0x06
 209
 210 #define NFC_HCI_LINK_MGMT_GATE          0x06
 211 #define NFC_HCI_LINK_MGMT_REC_ERROR     0x01
 212
 213 #define NFC_HCI_RF_READER_B_GATE                        0x11
 214 #define NFC_HCI_RF_READER_B_PUPI                        0x03
 215 #define NFC_HCI_RF_READER_B_APPLICATION_DATA            0x04
 216 #define NFC_HCI_RF_READER_B_AFI                         0x02
 217 #define NFC_HCI_RF_READER_B_HIGHER_LAYER_RESPONSE       0x01
 218 #define NFC_HCI_RF_READER_B_HIGHER_LAYER_DATA           0x05
 219
 220 #define NFC_HCI_RF_READER_A_GATE                0x13
 221 #define NFC_HCI_RF_READER_A_UID                 0x02
 222 #define NFC_HCI_RF_READER_A_ATQA                0x04
 223 #define NFC_HCI_RF_READER_A_APPLICATION_DATA    0x05
 224 #define NFC_HCI_RF_READER_A_SAK                 0x03
 225 #define NFC_HCI_RF_READER_A_FWI_SFGT            0x06
 226 #define NFC_HCI_RF_READER_A_DATARATE_MAX        0x01
 227
 228 #define NFC_HCI_TYPE_A_SEL_PROT(x)              (((x) & 0x60) >> 5)
 229 #define NFC_HCI_TYPE_A_SEL_PROT_MIFARE          0
 230 #define NFC_HCI_TYPE_A_SEL_PROT_ISO14443        1
 231 #define NFC_HCI_TYPE_A_SEL_PROT_DEP             2
 232 #define NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP    3
 233
 234 /* Generic events */
 235 #define NFC_HCI_EVT_HCI_END_OF_OPERATION        0x01
 236 #define NFC_HCI_EVT_POST_DATA                   0x02
 237 #define NFC_HCI_EVT_HOT_PLUG                    0x03
 238
 239 /* Generic commands */
 240 #define NFC_HCI_ANY_SET_PARAMETER       0x01
 241 #define NFC_HCI_ANY_GET_PARAMETER       0x02
 242 #define NFC_HCI_ANY_OPEN_PIPE           0x03
 243 #define NFC_HCI_ANY_CLOSE_PIPE          0x04
 244
 245 /* Reader RF gates events */
 246 #define NFC_HCI_EVT_READER_REQUESTED    0x10
 247 #define NFC_HCI_EVT_END_OPERATION       0x11
 248
 249 /* Reader Application gate events */
 250 #define NFC_HCI_EVT_TARGET_DISCOVERED   0x10
 251
 252 /* receiving messages from lower layer */
 253 void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
 254                            struct sk_buff *skb);
 255 void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
 256                           struct sk_buff *skb);
 257 void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
 258                             struct sk_buff *skb);
 259 void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb);
 260
 261 /* connecting to gates and sending hci instructions */
 262 int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
 263                          u8 pipe);
 264 int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate);
 265 int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev);
 266 int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
 267                       struct sk_buff **skb);
 268 int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
 269                       const u8 *param, size_t param_len);
 270 int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
 271                      const u8 *param, size_t param_len, struct sk_buff **skb);
 272 int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
 273                            const u8 *param, size_t param_len,
 274                            data_exchange_cb_t cb, void *cb_context);
 275 int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
 276                        const u8 *param, size_t param_len);
 277 int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate);
 278 u32 nfc_hci_sak_to_protocol(u8 sak);
 279
 280 #endif /* __NET_HCI_H */