239 строки
6.5 KiB
C
239 строки
6.5 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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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_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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#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_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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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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struct pn533 *pn533_register_device(u32 device_type,
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u32 protocols,
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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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struct device *parent);
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void pn533_unregister_device(struct pn533 *priv);
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void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status);
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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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