drivers/nfc/pn533/pn533.h

   1 /*
   2  * Driver for NXP PN533 NFC Chip
   3  *
   4  * Copyright (C) 2011 Instituto Nokia de Tecnologia
   5  * Copyright (C) 2012-2013 Tieto Poland
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #define PN533_DEVICE_STD     0x1
  22 #define PN533_DEVICE_PASORI  0x2
  23 #define PN533_DEVICE_ACR122U 0x3
  24 #define PN533_DEVICE_PN532   0x4
  25
  26 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
  27                              NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
  28                              NFC_PROTO_NFC_DEP_MASK |\
  29                              NFC_PROTO_ISO14443_B_MASK)
  30
  31 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
  32                                    NFC_PROTO_MIFARE_MASK | \
  33                                    NFC_PROTO_FELICA_MASK | \
  34                                    NFC_PROTO_ISO14443_MASK | \
  35                                    NFC_PROTO_NFC_DEP_MASK)
  36
  37 /* Standard pn533 frame definitions (standard and extended)*/
  38 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
  39                                         + 2) /* data[0] TFI, data[1] CC */
  40 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  41
  42 #define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
  43                                         + 2) /* data[0] TFI, data[1] CC */
  44
  45 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
  46 #define PN533_CMD_DATAEXCH_DATA_MAXLEN  262
  47 #define PN533_CMD_DATAFRAME_MAXLEN      240     /* max data length (send) */
  48
  49 /*
  50  * Max extended frame payload len, excluding TFI and CC
  51  * which are already in PN533_FRAME_HEADER_LEN.
  52  */
  53 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
  54
  55
  56 /* Preamble (1), SoPC (2), ACK Code (2), Postamble (1) */
  57 #define PN533_STD_FRAME_ACK_SIZE 6
  58 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
  59 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
  60 /* Half start code (3), LEN (4) should be 0xffff for extended frame */
  61 #define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
  62                                         && (hdr)->datalen_checksum == 0xFF)
  63 #define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
  64
  65 /* start of frame */
  66 #define PN533_STD_FRAME_SOF 0x00FF
  67
  68 /* standard frame identifier: in/out/error */
  69 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
  70 #define PN533_STD_FRAME_DIR_OUT 0xD4
  71 #define PN533_STD_FRAME_DIR_IN 0xD5
  72
  73 /* PN533 Commands */
  74 #define PN533_FRAME_CMD(f) (f->data[1])
  75
  76 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
  77 #define PN533_CMD_SAM_CONFIGURATION 0x14
  78 #define PN533_CMD_RF_CONFIGURATION 0x32
  79 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
  80 #define PN533_CMD_IN_COMM_THRU     0x42
  81 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
  82 #define PN533_CMD_IN_ATR 0x50
  83 #define PN533_CMD_IN_RELEASE 0x52
  84 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
  85
  86 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
  87 #define PN533_CMD_TG_GET_DATA 0x86
  88 #define PN533_CMD_TG_SET_DATA 0x8e
  89 #define PN533_CMD_TG_SET_META_DATA 0x94
  90 #define PN533_CMD_UNDEF 0xff
  91
  92 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
  93
  94 /* PN533 Return codes */
  95 #define PN533_CMD_RET_MASK 0x3F
  96 #define PN533_CMD_MI_MASK 0x40
  97 #define PN533_CMD_RET_SUCCESS 0x00
  98
  99
 100 enum  pn533_protocol_type {
 101         PN533_PROTO_REQ_ACK_RESP = 0,
 102         PN533_PROTO_REQ_RESP
 103 };
 104
 105 /* Poll modulations */
 106 enum {
 107         PN533_POLL_MOD_106KBPS_A,
 108         PN533_POLL_MOD_212KBPS_FELICA,
 109         PN533_POLL_MOD_424KBPS_FELICA,
 110         PN533_POLL_MOD_106KBPS_JEWEL,
 111         PN533_POLL_MOD_847KBPS_B,
 112         PN533_LISTEN_MOD,
 113
 114         __PN533_POLL_MOD_AFTER_LAST,
 115 };
 116 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
 117
 118 struct pn533_std_frame {
 119         u8 preamble;
 120         __be16 start_frame;
 121         u8 datalen;
 122         u8 datalen_checksum;
 123         u8 data[];
 124 } __packed;
 125
 126 struct pn533_ext_frame {        /* Extended Information frame */
 127         u8 preamble;
 128         __be16 start_frame;
 129         __be16 eif_flag;        /* fixed to 0xFFFF */
 130         __be16 datalen;
 131         u8 datalen_checksum;
 132         u8 data[];
 133 } __packed;
 134
 135 struct pn533 {
 136         struct nfc_dev *nfc_dev;
 137         u32 device_type;
 138         enum pn533_protocol_type protocol_type;
 139
 140         struct sk_buff_head resp_q;
 141         struct sk_buff_head fragment_skb;
 142
 143         struct workqueue_struct *wq;
 144         struct work_struct cmd_work;
 145         struct work_struct cmd_complete_work;
 146         struct delayed_work poll_work;
 147         struct work_struct mi_rx_work;
 148         struct work_struct mi_tx_work;
 149         struct work_struct mi_tm_rx_work;
 150         struct work_struct mi_tm_tx_work;
 151         struct work_struct tg_work;
 152         struct work_struct rf_work;
 153
 154         struct list_head cmd_queue;
 155         struct pn533_cmd *cmd;
 156         u8 cmd_pending;
 157         struct mutex cmd_lock;  /* protects cmd queue */
 158
 159         void *cmd_complete_mi_arg;
 160         void *cmd_complete_dep_arg;
 161
 162         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 163         u8 poll_mod_count;
 164         u8 poll_mod_curr;
 165         u8 poll_dep;
 166         u32 poll_protocols;
 167         u32 listen_protocols;
 168         struct timer_list listen_timer;
 169         int cancel_listen;
 170
 171         u8 *gb;
 172         size_t gb_len;
 173
 174         u8 tgt_available_prots;
 175         u8 tgt_active_prot;
 176         u8 tgt_mode;
 177
 178         struct pn533_frame_ops *ops;
 179
 180         struct device *dev;
 181         void *phy;
 182         struct pn533_phy_ops *phy_ops;
 183 };
 184
 185 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
 186                                         struct sk_buff *resp);
 187
 188 struct pn533_cmd {
 189         struct list_head queue;
 190         u8 code;
 191         int status;
 192         struct sk_buff *req;
 193         struct sk_buff *resp;
 194         pn533_send_async_complete_t  complete_cb;
 195         void *complete_cb_context;
 196 };
 197
 198
 199 struct pn533_frame_ops {
 200         void (*tx_frame_init)(void *frame, u8 cmd_code);
 201         void (*tx_frame_finish)(void *frame);
 202         void (*tx_update_payload_len)(void *frame, int len);
 203         int tx_header_len;
 204         int tx_tail_len;
 205
 206         bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
 207         bool (*rx_frame_is_ack)(void *frame);
 208         int (*rx_frame_size)(void *frame);
 209         int rx_header_len;
 210         int rx_tail_len;
 211
 212         int max_payload_len;
 213         u8 (*get_cmd_code)(void *frame);
 214 };
 215
 216
 217 struct pn533_phy_ops {
 218         int (*send_frame)(struct pn533 *priv,
 219                           struct sk_buff *out);
 220         int (*send_ack)(struct pn533 *dev, gfp_t flags);
 221         void (*abort_cmd)(struct pn533 *priv, gfp_t flags);
 222 };
 223
 224
 225 struct pn533 *pn533_register_device(u32 device_type,
 226                                 u32 protocols,
 227                                 enum pn533_protocol_type protocol_type,
 228                                 void *phy,
 229                                 struct pn533_phy_ops *phy_ops,
 230                                 struct pn533_frame_ops *fops,
 231                                 struct device *dev,
 232                                 struct device *parent);
 233
 234 void pn533_unregister_device(struct pn533 *priv);
 235 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status);
 236
 237 bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame);
 238 bool pn533_rx_frame_is_ack(void *_frame);