text: /*
   * Copyright (C) 2011 Instituto Nokia de Tecnologia
   *
   * Authors:
   *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
   *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
   *
   * 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, write to the
   * Free Software Foundation, Inc.,
   * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   */
  
  #ifndef __NET_NFC_H
  #define __NET_NFC_H
  
  #include <linux/nfc.h>
  #include <linux/device.h>
  #include <linux/skbuff.h>
  
  #define nfc_dev_info(dev, fmt, arg...) dev_info((dev), "NFC: " fmt "\n", ## arg)
  #define nfc_dev_err(dev, fmt, arg...) dev_err((dev), "NFC: " fmt "\n", ## arg)
  #define nfc_dev_dbg(dev, fmt, arg...) dev_dbg((dev), fmt "\n", ## arg)
  
  struct nfc_dev;
  
  /**
   * data_exchange_cb_t - Definition of nfc_data_exchange callback
   *
   * @context: nfc_data_exchange cb_context parameter
   * @skb: response data
   * @err: If an error has occurred during data exchange, it is the
   *	error number. Zero means no error.
   *
   * When a rx or tx package is lost or corrupted or the target gets out
   * of the operating field, err is -EIO.
   */
  typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb,
  								int err);
  
  struct nfc_target;
  
  struct nfc_ops {
  	int (*dev_up)(struct nfc_dev *dev);
  	int (*dev_down)(struct nfc_dev *dev);
  	int (*start_poll)(struct nfc_dev *dev, u32 protocols);
  	void (*stop_poll)(struct nfc_dev *dev);
  	int (*dep_link_up)(struct nfc_dev *dev, struct nfc_target *target,
  			   u8 comm_mode, u8 *gb, size_t gb_len);
  	int (*dep_link_down)(struct nfc_dev *dev);
  	int (*activate_target)(struct nfc_dev *dev, struct nfc_target *target,
  			       u32 protocol);
  	void (*deactivate_target)(struct nfc_dev *dev,
  				  struct nfc_target *target);
  	int (*data_exchange)(struct nfc_dev *dev, struct nfc_target *target,
  			     struct sk_buff *skb, data_exchange_cb_t cb,
  			     void *cb_context);
  	int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target);
  };
  
  #define NFC_TARGET_IDX_ANY -1
  #define NFC_MAX_GT_LEN 48
  
  struct nfc_target {
  	u32 idx;
  	u32 supported_protocols;
  	u16 sens_res;
  	u8 sel_res;
  	u8 nfcid1_len;
  	u8 nfcid1[NFC_NFCID1_MAXSIZE];
  	u8 sensb_res_len;
  	u8 sensb_res[NFC_SENSB_RES_MAXSIZE];
  	u8 sensf_res_len;
  	u8 sensf_res[NFC_SENSF_RES_MAXSIZE];
  	u8 hci_reader_gate;
  	u8 logical_idx;
  };
  
  struct nfc_genl_data {
  	u32 poll_req_pid;
  	struct mutex genl_data_mutex;
  };
  
  struct nfc_dev {
  	unsigned int idx;
  	u32 target_next_idx;
  	struct nfc_target *targets;
  	int n_targets;
  	int targets_generation;
  	struct device dev;
  	bool dev_up;
  	bool polling;
  	struct nfc_target *active_target;
  	bool dep_link_up;
  	u32 dep_rf_mode;
  	struct nfc_genl_data genl_data;
  	u32 supported_protocols;
  
  	int tx_headroom;
  	int tx_tailroom;
  
  	struct timer_list check_pres_timer;
  	struct workqueue_struct *check_pres_wq;
  	struct work_struct check_pres_work;
  
  	struct nfc_ops *ops;
  };
  #define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev)
  
  extern struct class nfc_class;
  
  struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
  				    u32 supported_protocols,
  				    int tx_headroom,
  				    int tx_tailroom);
  
  /**
   * nfc_free_device - free nfc device
   *
   * @dev: The nfc device to free
   */
  static inline void nfc_free_device(struct nfc_dev *dev)
  {
  	put_device(&dev->dev);
  }
  
  int nfc_register_device(struct nfc_dev *dev);
  
  void nfc_unregister_device(struct nfc_dev *dev);
  
  /**
   * nfc_set_parent_dev - set the parent device
   *
   * @nfc_dev: The nfc device whose parent is being set
   * @dev: The parent device
   */
  static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev,
  				      struct device *dev)
  {
  	nfc_dev->dev.parent = dev;
  }
  
  /**
   * nfc_set_drvdata - set driver specifc data
   *
   * @dev: The nfc device
   * @data: Pointer to driver specifc data
   */
  static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data)
  {
  	dev_set_drvdata(&dev->dev, data);
  }
  
  /**
   * nfc_get_drvdata - get driver specifc data
   *
   * @dev: The nfc device
   */
  static inline void *nfc_get_drvdata(struct nfc_dev *dev)
  {
  	return dev_get_drvdata(&dev->dev);
  }
  
  /**
   * nfc_device_name - get the nfc device name
   *
   * @dev: The nfc device whose name to return
   */
  static inline const char *nfc_device_name(struct nfc_dev *dev)
  {
  	return dev_name(&dev->dev);
  }
  
  struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk,
  				   unsigned int flags, unsigned int size,
  				   unsigned int *err);
  struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp);
  
  int nfc_set_remote_general_bytes(struct nfc_dev *dev,
  				 u8 *gt, u8 gt_len);
  
  int nfc_targets_found(struct nfc_dev *dev,
  		      struct nfc_target *targets, int ntargets);
  int nfc_target_lost(struct nfc_dev *dev, u32 target_idx);
  
  int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
  		       u8 comm_mode, u8 rf_mode);
  
  #endif /* __NET_NFC_H */
  