drivers/nfc/pn533/pn533.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Driver for NXP PN533 NFC Chip
   4  *
   5  * Copyright (C) 2011 Instituto Nokia de Tecnologia
   6  * Copyright (C) 2012-2013 Tieto Poland
   7  */
   8
   9 #define PN533_DEVICE_STD                0x1
  10 #define PN533_DEVICE_PASORI             0x2
  11 #define PN533_DEVICE_ACR122U            0x3
  12 #define PN533_DEVICE_PN532              0x4
  13 #define PN533_DEVICE_PN532_AUTOPOLL     0x5
  14
  15 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
  16                              NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
  17                              NFC_PROTO_NFC_DEP_MASK |\
  18                              NFC_PROTO_ISO14443_B_MASK)
  19
  20 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
  21                                    NFC_PROTO_MIFARE_MASK | \
  22                                    NFC_PROTO_FELICA_MASK | \
  23                                    NFC_PROTO_ISO14443_MASK | \
  24                                    NFC_PROTO_NFC_DEP_MASK)
  25
  26 /* Standard pn533 frame definitions (standard and extended)*/
  27 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
  28                                         + 2) /* data[0] TFI, data[1] CC */
  29 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  30
  31 #define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
  32                                         + 2) /* data[0] TFI, data[1] CC */
  33
  34 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
  35 #define PN533_CMD_DATAEXCH_DATA_MAXLEN  262
  36 #define PN533_CMD_DATAFRAME_MAXLEN      240     /* max data length (send) */
  37
  38 /*
  39  * Max extended frame payload len, excluding TFI and CC
  40  * which are already in PN533_FRAME_HEADER_LEN.
  41  */
  42 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
  43
  44
  45 /* Preamble (1), SoPC (2), ACK Code (2), Postamble (1) */
  46 #define PN533_STD_FRAME_ACK_SIZE 6
  47 /*
  48  * Preamble (1), SoPC (2), Packet Length (1), Packet Length Checksum (1),
  49  * Specific Application Level Error Code (1) , Postamble (1)
  50  */
  51 #define PN533_STD_ERROR_FRAME_SIZE 8
  52 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
  53 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
  54 /* Half start code (3), LEN (4) should be 0xffff for extended frame */
  55 #define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
  56                                         && (hdr)->datalen_checksum == 0xFF)
  57 #define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
  58
  59 /* start of frame */
  60 #define PN533_STD_FRAME_SOF 0x00FF
  61
  62 /* standard frame identifier: in/out/error */
  63 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
  64 #define PN533_STD_FRAME_DIR_OUT 0xD4
  65 #define PN533_STD_FRAME_DIR_IN 0xD5
  66
  67 /* PN533 Commands */
  68 #define PN533_FRAME_CMD(f) (f->data[1])
  69
  70 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
  71 #define PN533_CMD_SAM_CONFIGURATION 0x14
  72 #define PN533_CMD_RF_CONFIGURATION 0x32
  73 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
  74 #define PN533_CMD_IN_COMM_THRU     0x42
  75 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
  76 #define PN533_CMD_IN_ATR 0x50
  77 #define PN533_CMD_IN_RELEASE 0x52
  78 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
  79 #define PN533_CMD_IN_AUTOPOLL 0x60
  80
  81 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
  82 #define PN533_CMD_TG_GET_DATA 0x86
  83 #define PN533_CMD_TG_SET_DATA 0x8e
  84 #define PN533_CMD_TG_SET_META_DATA 0x94
  85 #define PN533_CMD_UNDEF 0xff
  86
  87 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
  88
  89 /* PN533 Return codes */
  90 #define PN533_CMD_RET_MASK 0x3F
  91 #define PN533_CMD_MI_MASK 0x40
  92 #define PN533_CMD_RET_SUCCESS 0x00
  93
  94 #define PN533_FRAME_DATALEN_ACK 0x00
  95 #define PN533_FRAME_DATALEN_ERROR 0x01
  96 #define PN533_FRAME_DATALEN_EXTENDED 0xFF
  97
  98 enum  pn533_protocol_type {
  99         PN533_PROTO_REQ_ACK_RESP = 0,
 100         PN533_PROTO_REQ_RESP
 101 };
 102
 103 /* Poll modulations */
 104 enum {
 105         PN533_POLL_MOD_106KBPS_A,
 106         PN533_POLL_MOD_212KBPS_FELICA,
 107         PN533_POLL_MOD_424KBPS_FELICA,
 108         PN533_POLL_MOD_106KBPS_JEWEL,
 109         PN533_POLL_MOD_847KBPS_B,
 110         PN533_LISTEN_MOD,
 111
 112         __PN533_POLL_MOD_AFTER_LAST,
 113 };
 114 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
 115
 116 struct pn533_std_frame {
 117         u8 preamble;
 118         __be16 start_frame;
 119         u8 datalen;
 120         u8 datalen_checksum;
 121         u8 data[];
 122 } __packed;
 123
 124 struct pn533_ext_frame {        /* Extended Information frame */
 125         u8 preamble;
 126         __be16 start_frame;
 127         __be16 eif_flag;        /* fixed to 0xFFFF */
 128         __be16 datalen;
 129         u8 datalen_checksum;
 130         u8 data[];
 131 } __packed;
 132
 133 struct pn533 {
 134         struct nfc_dev *nfc_dev;
 135         u32 device_type;
 136         enum pn533_protocol_type protocol_type;
 137
 138         struct sk_buff_head resp_q;
 139         struct sk_buff_head fragment_skb;
 140
 141         struct workqueue_struct *wq;
 142         struct work_struct cmd_work;
 143         struct work_struct cmd_complete_work;
 144         struct delayed_work poll_work;
 145         struct work_struct mi_rx_work;
 146         struct work_struct mi_tx_work;
 147         struct work_struct mi_tm_rx_work;
 148         struct work_struct mi_tm_tx_work;
 149         struct work_struct tg_work;
 150         struct work_struct rf_work;
 151
 152         struct list_head cmd_queue;
 153         struct pn533_cmd *cmd;
 154         u8 cmd_pending;
 155         struct mutex cmd_lock;  /* protects cmd queue */
 156
 157         void *cmd_complete_mi_arg;
 158         void *cmd_complete_dep_arg;
 159
 160         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 161         u8 poll_mod_count;
 162         u8 poll_mod_curr;
 163         u8 poll_dep;
 164         u32 poll_protocols;
 165         u32 listen_protocols;
 166         struct timer_list listen_timer;
 167         int cancel_listen;
 168
 169         u8 *gb;
 170         size_t gb_len;
 171
 172         u8 tgt_available_prots;
 173         u8 tgt_active_prot;
 174         u8 tgt_mode;
 175
 176         struct pn533_frame_ops *ops;
 177
 178         struct device *dev;
 179         void *phy;
 180         struct pn533_phy_ops *phy_ops;
 181 };
 182
 183 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
 184                                         struct sk_buff *resp);
 185
 186 struct pn533_cmd {
 187         struct list_head queue;
 188         u8 code;
 189         int status;
 190         struct sk_buff *req;
 191         struct sk_buff *resp;
 192         pn533_send_async_complete_t  complete_cb;
 193         void *complete_cb_context;
 194 };
 195
 196
 197 struct pn533_frame_ops {
 198         void (*tx_frame_init)(void *frame, u8 cmd_code);
 199         void (*tx_frame_finish)(void *frame);
 200         void (*tx_update_payload_len)(void *frame, int len);
 201         int tx_header_len;
 202         int tx_tail_len;
 203
 204         bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
 205         bool (*rx_frame_is_ack)(void *frame);
 206         int (*rx_frame_size)(void *frame);
 207         int rx_header_len;
 208         int rx_tail_len;
 209
 210         int max_payload_len;
 211         u8 (*get_cmd_code)(void *frame);
 212 };
 213
 214
 215 struct pn533_phy_ops {
 216         int (*send_frame)(struct pn533 *priv,
 217                           struct sk_buff *out);
 218         int (*send_ack)(struct pn533 *dev, gfp_t flags);
 219         void (*abort_cmd)(struct pn533 *priv, gfp_t flags);
 220         /*
 221          * dev_up and dev_down are optional.
 222          * They are used to inform the phy layer that the nfc chip
 223          * is going to be really used very soon. The phy layer can then
 224          * bring up it's interface to the chip and have it suspended for power
 225          * saving reasons otherwise.
 226          */
 227         int (*dev_up)(struct pn533 *priv);
 228         int (*dev_down)(struct pn533 *priv);
 229 };
 230
 231
 232 struct pn533 *pn53x_common_init(u32 device_type,
 233                                 enum pn533_protocol_type protocol_type,
 234                                 void *phy,
 235                                 struct pn533_phy_ops *phy_ops,
 236                                 struct pn533_frame_ops *fops,
 237                                 struct device *dev);
 238
 239 int pn533_finalize_setup(struct pn533 *dev);
 240 void pn53x_common_clean(struct pn533 *priv);
 241 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status);
 242 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
 243                         struct device *parent);
 244 int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
 245                         struct device *parent);
 246 void pn53x_unregister_nfc(struct pn533 *priv);
 247
 248 bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame);
 249 bool pn533_rx_frame_is_ack(void *_frame);