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* Copyright (C) 2011 Instituto Nokia de Tecnologia
* Authors:
* Lauro Ramos Venancio <>
* Aloisio Almeida Jr <>
* 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
* 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_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)
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 */