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path: root/drivers/nfc/pn533/pn533.h
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Diffstat (limited to 'drivers/nfc/pn533/pn533.h')
-rw-r--r--drivers/nfc/pn533/pn533.h235
1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/nfc/pn533/pn533.h b/drivers/nfc/pn533/pn533.h
new file mode 100644
index 000000000000..1d9f19eb2a99
--- /dev/null
+++ b/drivers/nfc/pn533/pn533.h
@@ -0,0 +1,235 @@
+/*
+ * Driver for NXP PN533 NFC Chip
+ *
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ * Copyright (C) 2012-2013 Tieto Poland
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define PN533_DEVICE_STD 0x1
+#define PN533_DEVICE_PASORI 0x2
+#define PN533_DEVICE_ACR122U 0x3
+
+#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
+ NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
+ NFC_PROTO_NFC_DEP_MASK |\
+ NFC_PROTO_ISO14443_B_MASK)
+
+#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
+ NFC_PROTO_MIFARE_MASK | \
+ NFC_PROTO_FELICA_MASK | \
+ NFC_PROTO_ISO14443_MASK | \
+ NFC_PROTO_NFC_DEP_MASK)
+
+/* Standard pn533 frame definitions (standard and extended)*/
+#define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
+ + 2) /* data[0] TFI, data[1] CC */
+#define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
+
+#define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
+ + 2) /* data[0] TFI, data[1] CC */
+
+#define PN533_CMD_DATAEXCH_HEAD_LEN 1
+#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
+#define PN533_CMD_DATAFRAME_MAXLEN 240 /* max data length (send) */
+
+/*
+ * Max extended frame payload len, excluding TFI and CC
+ * which are already in PN533_FRAME_HEADER_LEN.
+ */
+#define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
+
+
+/* Preamble (1), SoPC (2), ACK Code (2), Postamble (1) */
+#define PN533_STD_FRAME_ACK_SIZE 6
+#define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
+#define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
+/* Half start code (3), LEN (4) should be 0xffff for extended frame */
+#define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
+ && (hdr)->datalen_checksum == 0xFF)
+#define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
+
+/* start of frame */
+#define PN533_STD_FRAME_SOF 0x00FF
+
+/* standard frame identifier: in/out/error */
+#define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
+#define PN533_STD_FRAME_DIR_OUT 0xD4
+#define PN533_STD_FRAME_DIR_IN 0xD5
+
+/* PN533 Commands */
+#define PN533_FRAME_CMD(f) (f->data[1])
+
+#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
+#define PN533_CMD_RF_CONFIGURATION 0x32
+#define PN533_CMD_IN_DATA_EXCHANGE 0x40
+#define PN533_CMD_IN_COMM_THRU 0x42
+#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
+#define PN533_CMD_IN_ATR 0x50
+#define PN533_CMD_IN_RELEASE 0x52
+#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
+
+#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
+#define PN533_CMD_TG_GET_DATA 0x86
+#define PN533_CMD_TG_SET_DATA 0x8e
+#define PN533_CMD_TG_SET_META_DATA 0x94
+#define PN533_CMD_UNDEF 0xff
+
+#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
+
+/* PN533 Return codes */
+#define PN533_CMD_RET_MASK 0x3F
+#define PN533_CMD_MI_MASK 0x40
+#define PN533_CMD_RET_SUCCESS 0x00
+
+
+enum pn533_protocol_type {
+ PN533_PROTO_REQ_ACK_RESP = 0,
+ PN533_PROTO_REQ_RESP
+};
+
+/* Poll modulations */
+enum {
+ PN533_POLL_MOD_106KBPS_A,
+ PN533_POLL_MOD_212KBPS_FELICA,
+ PN533_POLL_MOD_424KBPS_FELICA,
+ PN533_POLL_MOD_106KBPS_JEWEL,
+ PN533_POLL_MOD_847KBPS_B,
+ PN533_LISTEN_MOD,
+
+ __PN533_POLL_MOD_AFTER_LAST,
+};
+#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
+
+struct pn533_std_frame {
+ u8 preamble;
+ __be16 start_frame;
+ u8 datalen;
+ u8 datalen_checksum;
+ u8 data[];
+} __packed;
+
+struct pn533_ext_frame { /* Extended Information frame */
+ u8 preamble;
+ __be16 start_frame;
+ __be16 eif_flag; /* fixed to 0xFFFF */
+ __be16 datalen;
+ u8 datalen_checksum;
+ u8 data[];
+} __packed;
+
+struct pn533 {
+ struct nfc_dev *nfc_dev;
+ u32 device_type;
+ enum pn533_protocol_type protocol_type;
+
+ struct sk_buff_head resp_q;
+ struct sk_buff_head fragment_skb;
+
+ struct workqueue_struct *wq;
+ struct work_struct cmd_work;
+ struct work_struct cmd_complete_work;
+ struct delayed_work poll_work;
+ struct work_struct mi_rx_work;
+ struct work_struct mi_tx_work;
+ struct work_struct mi_tm_rx_work;
+ struct work_struct mi_tm_tx_work;
+ struct work_struct tg_work;
+ struct work_struct rf_work;
+
+ struct list_head cmd_queue;
+ struct pn533_cmd *cmd;
+ u8 cmd_pending;
+ struct mutex cmd_lock; /* protects cmd queue */
+
+ void *cmd_complete_mi_arg;
+ void *cmd_complete_dep_arg;
+
+ struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
+ u8 poll_mod_count;
+ u8 poll_mod_curr;
+ u8 poll_dep;
+ u32 poll_protocols;
+ u32 listen_protocols;
+ struct timer_list listen_timer;
+ int cancel_listen;
+
+ u8 *gb;
+ size_t gb_len;
+
+ u8 tgt_available_prots;
+ u8 tgt_active_prot;
+ u8 tgt_mode;
+
+ struct pn533_frame_ops *ops;
+
+ struct device *dev;
+ void *phy;
+ struct pn533_phy_ops *phy_ops;
+};
+
+typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
+ struct sk_buff *resp);
+
+struct pn533_cmd {
+ struct list_head queue;
+ u8 code;
+ int status;
+ struct sk_buff *req;
+ struct sk_buff *resp;
+ pn533_send_async_complete_t complete_cb;
+ void *complete_cb_context;
+};
+
+
+struct pn533_frame_ops {
+ void (*tx_frame_init)(void *frame, u8 cmd_code);
+ void (*tx_frame_finish)(void *frame);
+ void (*tx_update_payload_len)(void *frame, int len);
+ int tx_header_len;
+ int tx_tail_len;
+
+ bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
+ bool (*rx_frame_is_ack)(void *frame);
+ int (*rx_frame_size)(void *frame);
+ int rx_header_len;
+ int rx_tail_len;
+
+ int max_payload_len;
+ u8 (*get_cmd_code)(void *frame);
+};
+
+
+struct pn533_phy_ops {
+ int (*send_frame)(struct pn533 *priv,
+ struct sk_buff *out);
+ int (*send_ack)(struct pn533 *dev, gfp_t flags);
+ void (*abort_cmd)(struct pn533 *priv, gfp_t flags);
+};
+
+
+struct pn533 *pn533_register_device(u32 device_type,
+ u32 protocols,
+ enum pn533_protocol_type protocol_type,
+ void *phy,
+ struct pn533_phy_ops *phy_ops,
+ struct pn533_frame_ops *fops,
+ struct device *dev);
+
+void pn533_unregister_device(struct pn533 *priv);
+void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status);
+
+bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame);
+bool pn533_rx_frame_is_ack(void *_frame);