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249 lines
6.8 KiB
249 lines
6.8 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Driver for NXP PN533 NFC Chip |
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* |
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* Copyright (C) 2011 Instituto Nokia de Tecnologia |
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* Copyright (C) 2012-2013 Tieto Poland |
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*/ |
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#define PN533_DEVICE_STD 0x1 |
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#define PN533_DEVICE_PASORI 0x2 |
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#define PN533_DEVICE_ACR122U 0x3 |
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#define PN533_DEVICE_PN532 0x4 |
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#define PN533_DEVICE_PN532_AUTOPOLL 0x5 |
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#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\ |
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NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\ |
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NFC_PROTO_NFC_DEP_MASK |\ |
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NFC_PROTO_ISO14443_B_MASK) |
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#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ |
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NFC_PROTO_MIFARE_MASK | \ |
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NFC_PROTO_FELICA_MASK | \ |
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NFC_PROTO_ISO14443_MASK | \ |
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NFC_PROTO_NFC_DEP_MASK) |
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/* Standard pn533 frame definitions (standard and extended)*/ |
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#define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \ |
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+ 2) /* data[0] TFI, data[1] CC */ |
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#define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/ |
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#define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \ |
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+ 2) /* data[0] TFI, data[1] CC */ |
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#define PN533_CMD_DATAEXCH_HEAD_LEN 1 |
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#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262 |
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#define PN533_CMD_DATAFRAME_MAXLEN 240 /* max data length (send) */ |
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/* |
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* Max extended frame payload len, excluding TFI and CC |
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* which are already in PN533_FRAME_HEADER_LEN. |
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*/ |
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#define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263 |
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/* Preamble (1), SoPC (2), ACK Code (2), Postamble (1) */ |
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#define PN533_STD_FRAME_ACK_SIZE 6 |
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/* |
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* Preamble (1), SoPC (2), Packet Length (1), Packet Length Checksum (1), |
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* Specific Application Level Error Code (1) , Postamble (1) |
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*/ |
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#define PN533_STD_ERROR_FRAME_SIZE 8 |
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#define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen]) |
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#define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1]) |
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/* Half start code (3), LEN (4) should be 0xffff for extended frame */ |
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#define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \ |
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&& (hdr)->datalen_checksum == 0xFF) |
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#define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)]) |
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/* start of frame */ |
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#define PN533_STD_FRAME_SOF 0x00FF |
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/* standard frame identifier: in/out/error */ |
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#define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */ |
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#define PN533_STD_FRAME_DIR_OUT 0xD4 |
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#define PN533_STD_FRAME_DIR_IN 0xD5 |
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/* PN533 Commands */ |
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#define PN533_FRAME_CMD(f) (f->data[1]) |
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#define PN533_CMD_GET_FIRMWARE_VERSION 0x02 |
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#define PN533_CMD_SAM_CONFIGURATION 0x14 |
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#define PN533_CMD_RF_CONFIGURATION 0x32 |
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#define PN533_CMD_IN_DATA_EXCHANGE 0x40 |
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#define PN533_CMD_IN_COMM_THRU 0x42 |
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#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A |
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#define PN533_CMD_IN_ATR 0x50 |
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#define PN533_CMD_IN_RELEASE 0x52 |
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#define PN533_CMD_IN_JUMP_FOR_DEP 0x56 |
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#define PN533_CMD_IN_AUTOPOLL 0x60 |
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#define PN533_CMD_TG_INIT_AS_TARGET 0x8c |
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#define PN533_CMD_TG_GET_DATA 0x86 |
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#define PN533_CMD_TG_SET_DATA 0x8e |
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#define PN533_CMD_TG_SET_META_DATA 0x94 |
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#define PN533_CMD_UNDEF 0xff |
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#define PN533_CMD_RESPONSE(cmd) (cmd + 1) |
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/* PN533 Return codes */ |
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#define PN533_CMD_RET_MASK 0x3F |
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#define PN533_CMD_MI_MASK 0x40 |
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#define PN533_CMD_RET_SUCCESS 0x00 |
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#define PN533_FRAME_DATALEN_ACK 0x00 |
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#define PN533_FRAME_DATALEN_ERROR 0x01 |
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#define PN533_FRAME_DATALEN_EXTENDED 0xFF |
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enum pn533_protocol_type { |
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PN533_PROTO_REQ_ACK_RESP = 0, |
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PN533_PROTO_REQ_RESP |
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}; |
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/* Poll modulations */ |
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enum { |
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PN533_POLL_MOD_106KBPS_A, |
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PN533_POLL_MOD_212KBPS_FELICA, |
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PN533_POLL_MOD_424KBPS_FELICA, |
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PN533_POLL_MOD_106KBPS_JEWEL, |
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PN533_POLL_MOD_847KBPS_B, |
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PN533_LISTEN_MOD, |
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__PN533_POLL_MOD_AFTER_LAST, |
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}; |
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#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1) |
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struct pn533_std_frame { |
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u8 preamble; |
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__be16 start_frame; |
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u8 datalen; |
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u8 datalen_checksum; |
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u8 data[]; |
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} __packed; |
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struct pn533_ext_frame { /* Extended Information frame */ |
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u8 preamble; |
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__be16 start_frame; |
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__be16 eif_flag; /* fixed to 0xFFFF */ |
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__be16 datalen; |
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u8 datalen_checksum; |
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u8 data[]; |
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} __packed; |
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struct pn533 { |
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struct nfc_dev *nfc_dev; |
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u32 device_type; |
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enum pn533_protocol_type protocol_type; |
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struct sk_buff_head resp_q; |
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struct sk_buff_head fragment_skb; |
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struct workqueue_struct *wq; |
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struct work_struct cmd_work; |
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struct work_struct cmd_complete_work; |
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struct delayed_work poll_work; |
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struct work_struct mi_rx_work; |
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struct work_struct mi_tx_work; |
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struct work_struct mi_tm_rx_work; |
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struct work_struct mi_tm_tx_work; |
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struct work_struct tg_work; |
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struct work_struct rf_work; |
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struct list_head cmd_queue; |
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struct pn533_cmd *cmd; |
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u8 cmd_pending; |
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struct mutex cmd_lock; /* protects cmd queue */ |
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void *cmd_complete_mi_arg; |
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void *cmd_complete_dep_arg; |
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struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1]; |
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u8 poll_mod_count; |
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u8 poll_mod_curr; |
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u8 poll_dep; |
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u32 poll_protocols; |
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u32 listen_protocols; |
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struct timer_list listen_timer; |
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int cancel_listen; |
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u8 *gb; |
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size_t gb_len; |
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u8 tgt_available_prots; |
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u8 tgt_active_prot; |
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u8 tgt_mode; |
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struct pn533_frame_ops *ops; |
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struct device *dev; |
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void *phy; |
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struct pn533_phy_ops *phy_ops; |
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}; |
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typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg, |
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struct sk_buff *resp); |
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struct pn533_cmd { |
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struct list_head queue; |
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u8 code; |
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int status; |
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struct sk_buff *req; |
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struct sk_buff *resp; |
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pn533_send_async_complete_t complete_cb; |
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void *complete_cb_context; |
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}; |
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struct pn533_frame_ops { |
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void (*tx_frame_init)(void *frame, u8 cmd_code); |
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void (*tx_frame_finish)(void *frame); |
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void (*tx_update_payload_len)(void *frame, int len); |
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int tx_header_len; |
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int tx_tail_len; |
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bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev); |
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bool (*rx_frame_is_ack)(void *frame); |
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int (*rx_frame_size)(void *frame); |
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int rx_header_len; |
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int rx_tail_len; |
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int max_payload_len; |
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u8 (*get_cmd_code)(void *frame); |
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}; |
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struct pn533_phy_ops { |
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int (*send_frame)(struct pn533 *priv, |
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struct sk_buff *out); |
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int (*send_ack)(struct pn533 *dev, gfp_t flags); |
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void (*abort_cmd)(struct pn533 *priv, gfp_t flags); |
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/* |
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* dev_up and dev_down are optional. |
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* They are used to inform the phy layer that the nfc chip |
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* is going to be really used very soon. The phy layer can then |
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* bring up it's interface to the chip and have it suspended for power |
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* saving reasons otherwise. |
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*/ |
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int (*dev_up)(struct pn533 *priv); |
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int (*dev_down)(struct pn533 *priv); |
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}; |
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struct pn533 *pn53x_common_init(u32 device_type, |
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enum pn533_protocol_type protocol_type, |
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void *phy, |
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struct pn533_phy_ops *phy_ops, |
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struct pn533_frame_ops *fops, |
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struct device *dev); |
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int pn533_finalize_setup(struct pn533 *dev); |
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void pn53x_common_clean(struct pn533 *priv); |
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void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status); |
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int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, |
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struct device *parent); |
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int pn53x_register_nfc(struct pn533 *priv, u32 protocols, |
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struct device *parent); |
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void pn53x_unregister_nfc(struct pn533 *priv); |
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bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame); |
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bool pn533_rx_frame_is_ack(void *_frame);
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