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 #include <net/nfc/nfc.h> 10 11 #define PN533_DEVICE_STD 0x1 12 #define PN533_DEVICE_PASORI 0x2 13 #define PN533_DEVICE_ACR122U 0x3 14 #define PN533_DEVICE_PN532 0x4 15 #define PN533_DEVICE_PN532_AUTOPOLL 0x5 16 17 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\ 18 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\ 19 NFC_PROTO_NFC_DEP_MASK |\ 20 NFC_PROTO_ISO14443_B_MASK) 21 22 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ 23 NFC_PROTO_MIFARE_MASK | \ 24 NFC_PROTO_FELICA_MASK | \ 25 NFC_PROTO_ISO14443_MASK | \ 26 NFC_PROTO_NFC_DEP_MASK) 27 28 /* Standard pn533 frame definitions (standard and extended)*/ 29 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \ 30 + 2) /* data[0] TFI, data[1] CC */ 31 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/ 32 33 #define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \ 34 + 2) /* data[0] TFI, data[1] CC */ 35 36 #define PN533_CMD_DATAEXCH_HEAD_LEN 1 37 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262 38 #define PN533_CMD_DATAFRAME_MAXLEN 240 /* max data length (send) */ 39 40 /* 41 * Max extended frame payload len, excluding TFI and CC 42 * which are already in PN533_FRAME_HEADER_LEN. 43 */ 44 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263 45 46 47 /* Preamble (1), SoPC (2), ACK Code (2), Postamble (1) */ 48 #define PN533_STD_FRAME_ACK_SIZE 6 49 /* 50 * Preamble (1), SoPC (2), Packet Length (1), Packet Length Checksum (1), 51 * Specific Application Level Error Code (1) , Postamble (1) 52 */ 53 #define PN533_STD_ERROR_FRAME_SIZE 8 54 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen]) 55 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1]) 56 /* Half start code (3), LEN (4) should be 0xffff for extended frame */ 57 #define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \ 58 && (hdr)->datalen_checksum == 0xFF) 59 #define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)]) 60 61 /* start of frame */ 62 #define PN533_STD_FRAME_SOF 0x00FF 63 64 /* standard frame identifier: in/out/error */ 65 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */ 66 #define PN533_STD_FRAME_DIR_OUT 0xD4 67 #define PN533_STD_FRAME_DIR_IN 0xD5 68 69 /* PN533 Commands */ 70 #define PN533_FRAME_CMD(f) (f->data[1]) 71 72 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02 73 #define PN533_CMD_SAM_CONFIGURATION 0x14 74 #define PN533_CMD_RF_CONFIGURATION 0x32 75 #define PN533_CMD_IN_DATA_EXCHANGE 0x40 76 #define PN533_CMD_IN_COMM_THRU 0x42 77 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A 78 #define PN533_CMD_IN_ATR 0x50 79 #define PN533_CMD_IN_RELEASE 0x52 80 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56 81 #define PN533_CMD_IN_AUTOPOLL 0x60 82 83 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c 84 #define PN533_CMD_TG_GET_DATA 0x86 85 #define PN533_CMD_TG_SET_DATA 0x8e 86 #define PN533_CMD_TG_SET_META_DATA 0x94 87 #define PN533_CMD_UNDEF 0xff 88 89 #define PN533_CMD_RESPONSE(cmd) (cmd + 1) 90 91 /* PN533 Return codes */ 92 #define PN533_CMD_RET_MASK 0x3F 93 #define PN533_CMD_MI_MASK 0x40 94 #define PN533_CMD_RET_SUCCESS 0x00 95 96 #define PN533_FRAME_DATALEN_ACK 0x00 97 #define PN533_FRAME_DATALEN_ERROR 0x01 98 #define PN533_FRAME_DATALEN_EXTENDED 0xFF 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[NFC_MAX_GT_LEN]; 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 const 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 * dev_up and dev_down are optional. 224 * They are used to inform the phy layer that the nfc chip 225 * is going to be really used very soon. The phy layer can then 226 * bring up it's interface to the chip and have it suspended for power 227 * saving reasons otherwise. 228 */ 229 int (*dev_up)(struct pn533 *priv); 230 int (*dev_down)(struct pn533 *priv); 231 }; 232 233 234 struct pn533 *pn53x_common_init(u32 device_type, 235 enum pn533_protocol_type protocol_type, 236 void *phy, 237 const struct pn533_phy_ops *phy_ops, 238 struct pn533_frame_ops *fops, 239 struct device *dev); 240 241 int pn533_finalize_setup(struct pn533 *dev); 242 void pn53x_common_clean(struct pn533 *priv); 243 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status); 244 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, 245 struct device *parent); 246 int pn53x_register_nfc(struct pn533 *priv, u32 protocols, 247 struct device *parent); 248 void pn53x_unregister_nfc(struct pn533 *priv); 249 250 bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame); 251 bool pn533_rx_frame_is_ack(void *_frame); 252