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nfc.h
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1 /*
2  * Copyright (C) 2011 Instituto Nokia de Tecnologia
3  *
4  * Authors:
5  * Lauro Ramos Venancio <[email protected]>
6  * Aloisio Almeida Jr <[email protected]>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the
20  * Free Software Foundation, Inc.,
21  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22  */
23 
24 #ifndef __NET_NFC_H
25 #define __NET_NFC_H
26 
27 #include <linux/nfc.h>
28 #include <linux/device.h>
29 #include <linux/skbuff.h>
30 
31 #define nfc_dev_info(dev, fmt, arg...) dev_info((dev), "NFC: " fmt "\n", ## arg)
32 #define nfc_dev_err(dev, fmt, arg...) dev_err((dev), "NFC: " fmt "\n", ## arg)
33 #define nfc_dev_dbg(dev, fmt, arg...) dev_dbg((dev), fmt "\n", ## arg)
34 
35 struct nfc_dev;
36 
48 typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb,
49  int err);
50 
51 struct nfc_target;
52 
53 struct nfc_ops {
54  int (*dev_up)(struct nfc_dev *dev);
55  int (*dev_down)(struct nfc_dev *dev);
56  int (*start_poll)(struct nfc_dev *dev,
57  u32 im_protocols, u32 tm_protocols);
58  void (*stop_poll)(struct nfc_dev *dev);
59  int (*dep_link_up)(struct nfc_dev *dev, struct nfc_target *target,
60  u8 comm_mode, u8 *gb, size_t gb_len);
63  u32 protocol);
65  struct nfc_target *target);
68  void *cb_context);
69  int (*tm_send)(struct nfc_dev *dev, struct sk_buff *skb);
71 };
72 
73 #define NFC_TARGET_IDX_ANY -1
74 #define NFC_MAX_GT_LEN 48
75 #define NFC_ATR_RES_GT_OFFSET 15
76 
77 struct nfc_target {
90 };
91 
92 struct nfc_genl_data {
95 };
96 
97 struct nfc_dev {
98  unsigned int idx;
103  struct device dev;
104  bool dev_up;
106  bool polling;
111 
114 
117 
118  struct nfc_ops *ops;
119 };
120 #define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev)
121 
122 extern struct class nfc_class;
123 
124 struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
126  int tx_headroom,
127  int tx_tailroom);
128 
134 static inline void nfc_free_device(struct nfc_dev *dev)
135 {
136  put_device(&dev->dev);
137 }
138 
139 int nfc_register_device(struct nfc_dev *dev);
140 
141 void nfc_unregister_device(struct nfc_dev *dev);
142 
149 static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev,
150  struct device *dev)
151 {
152  nfc_dev->dev.parent = dev;
153 }
154 
161 static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data)
162 {
163  dev_set_drvdata(&dev->dev, data);
164 }
165 
171 static inline void *nfc_get_drvdata(struct nfc_dev *dev)
172 {
173  return dev_get_drvdata(&dev->dev);
174 }
175 
181 static inline const char *nfc_device_name(struct nfc_dev *dev)
182 {
183  return dev_name(&dev->dev);
184 }
185 
186 struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk,
187  unsigned int flags, unsigned int size,
188  unsigned int *err);
189 struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp);
190 
192  u8 *gt, u8 gt_len);
193 u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len);
194 
195 int nfc_targets_found(struct nfc_dev *dev,
196  struct nfc_target *targets, int ntargets);
197 int nfc_target_lost(struct nfc_dev *dev, u32 target_idx);
198 
199 int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
200  u8 comm_mode, u8 rf_mode);
201 
202 int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode,
203  u8 *gb, size_t gb_len);
204 int nfc_tm_deactivated(struct nfc_dev *dev);
205 int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb);
206 
207 void nfc_driver_failure(struct nfc_dev *dev, int err);
208 
209 #endif /* __NET_NFC_H */