drivers/nfc/pn533/pn533.h - kernel/quantenna - Git at Google

 /*
  * 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_DEVICE_PN532   0x4

 #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_SAM_CONFIGURATION 0x14
 #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,
 				struct device *parent);

 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);
	/*
	* 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_DEVICE_PN532 0x4

	#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_SAM_CONFIGURATION 0x14
	#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,
	struct device *parent);

	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);