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3e256b8f LRV |
1 | /* |
2 | * Copyright (C) 2011 Instituto Nokia de Tecnologia | |
3 | * | |
4 | * Authors: | |
5 | * Lauro Ramos Venancio <lauro.venancio@openbossa.org> | |
6 | * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> | |
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/device.h> | |
28 | #include <linux/skbuff.h> | |
29 | ||
30 | #define nfc_dev_info(dev, fmt, arg...) dev_info((dev), "NFC: " fmt "\n", ## arg) | |
31 | #define nfc_dev_err(dev, fmt, arg...) dev_err((dev), "NFC: " fmt "\n", ## arg) | |
32 | #define nfc_dev_dbg(dev, fmt, arg...) dev_dbg((dev), fmt "\n", ## arg) | |
33 | ||
34 | struct nfc_dev; | |
35 | ||
36 | /** | |
37 | * data_exchange_cb_t - Definition of nfc_data_exchange callback | |
38 | * | |
39 | * @context: nfc_data_exchange cb_context parameter | |
40 | * @skb: response data | |
41 | * @err: If an error has occurred during data exchange, it is the | |
42 | * error number. Zero means no error. | |
43 | * | |
44 | * When a rx or tx package is lost or corrupted or the target gets out | |
45 | * of the operating field, err is -EIO. | |
46 | */ | |
47 | typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb, | |
48 | int err); | |
49 | ||
50 | struct nfc_ops { | |
8b3fe7b5 IE |
51 | int (*dev_up)(struct nfc_dev *dev); |
52 | int (*dev_down)(struct nfc_dev *dev); | |
3e256b8f LRV |
53 | int (*start_poll)(struct nfc_dev *dev, u32 protocols); |
54 | void (*stop_poll)(struct nfc_dev *dev); | |
1ed28f61 SO |
55 | int (*dep_link_up)(struct nfc_dev *dev, int target_idx, |
56 | u8 comm_mode, u8 rf_mode); | |
57 | int (*dep_link_down)(struct nfc_dev *dev); | |
3e256b8f LRV |
58 | int (*activate_target)(struct nfc_dev *dev, u32 target_idx, |
59 | u32 protocol); | |
60 | void (*deactivate_target)(struct nfc_dev *dev, u32 target_idx); | |
61 | int (*data_exchange)(struct nfc_dev *dev, u32 target_idx, | |
62 | struct sk_buff *skb, data_exchange_cb_t cb, | |
63 | void *cb_context); | |
64 | }; | |
65 | ||
1ed28f61 SO |
66 | #define NFC_TARGET_IDX_ANY -1 |
67 | #define NFC_MAX_GT_LEN 48 | |
68 | ||
4d12b8b1 LRV |
69 | struct nfc_target { |
70 | u32 idx; | |
71 | u32 supported_protocols; | |
72 | u16 sens_res; | |
73 | u8 sel_res; | |
74 | }; | |
75 | ||
76 | struct nfc_genl_data { | |
77 | u32 poll_req_pid; | |
78 | struct mutex genl_data_mutex; | |
79 | }; | |
80 | ||
3e256b8f LRV |
81 | struct nfc_dev { |
82 | unsigned idx; | |
4d12b8b1 LRV |
83 | unsigned target_idx; |
84 | struct nfc_target *targets; | |
85 | int n_targets; | |
86 | int targets_generation; | |
87 | spinlock_t targets_lock; | |
3e256b8f | 88 | struct device dev; |
8b3fe7b5 | 89 | bool dev_up; |
3e256b8f | 90 | bool polling; |
8b3fe7b5 | 91 | bool remote_activated; |
1ed28f61 SO |
92 | bool dep_link_up; |
93 | u32 dep_rf_mode; | |
4d12b8b1 | 94 | struct nfc_genl_data genl_data; |
3e256b8f LRV |
95 | u32 supported_protocols; |
96 | ||
e8753043 SO |
97 | int tx_headroom; |
98 | int tx_tailroom; | |
99 | ||
3e256b8f LRV |
100 | struct nfc_ops *ops; |
101 | }; | |
102 | #define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev) | |
103 | ||
104 | extern struct class nfc_class; | |
105 | ||
106 | struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, | |
e8753043 SO |
107 | u32 supported_protocols, |
108 | int tx_headroom, | |
109 | int tx_tailroom); | |
3e256b8f LRV |
110 | |
111 | /** | |
112 | * nfc_free_device - free nfc device | |
113 | * | |
114 | * @dev: The nfc device to free | |
115 | */ | |
116 | static inline void nfc_free_device(struct nfc_dev *dev) | |
117 | { | |
118 | put_device(&dev->dev); | |
119 | } | |
120 | ||
121 | int nfc_register_device(struct nfc_dev *dev); | |
122 | ||
123 | void nfc_unregister_device(struct nfc_dev *dev); | |
124 | ||
125 | /** | |
126 | * nfc_set_parent_dev - set the parent device | |
127 | * | |
128 | * @nfc_dev: The nfc device whose parent is being set | |
129 | * @dev: The parent device | |
130 | */ | |
131 | static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev, | |
132 | struct device *dev) | |
133 | { | |
134 | nfc_dev->dev.parent = dev; | |
135 | } | |
136 | ||
137 | /** | |
138 | * nfc_set_drvdata - set driver specifc data | |
139 | * | |
140 | * @dev: The nfc device | |
141 | * @data: Pointer to driver specifc data | |
142 | */ | |
143 | static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data) | |
144 | { | |
145 | dev_set_drvdata(&dev->dev, data); | |
146 | } | |
147 | ||
148 | /** | |
149 | * nfc_get_drvdata - get driver specifc data | |
150 | * | |
151 | * @dev: The nfc device | |
152 | */ | |
153 | static inline void *nfc_get_drvdata(struct nfc_dev *dev) | |
154 | { | |
155 | return dev_get_drvdata(&dev->dev); | |
156 | } | |
157 | ||
158 | /** | |
159 | * nfc_device_name - get the nfc device name | |
160 | * | |
161 | * @dev: The nfc device whose name to return | |
162 | */ | |
163 | static inline const char *nfc_device_name(struct nfc_dev *dev) | |
164 | { | |
165 | return dev_name(&dev->dev); | |
166 | } | |
167 | ||
7c7cd3bf SO |
168 | struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk, |
169 | unsigned int flags, unsigned int size, | |
170 | unsigned int *err); | |
171 | struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp); | |
3e256b8f | 172 | |
541d920b SO |
173 | int nfc_set_remote_general_bytes(struct nfc_dev *dev, |
174 | u8 *gt, u8 gt_len); | |
175 | ||
176 | u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, u8 *gt_len); | |
177 | ||
4d12b8b1 LRV |
178 | int nfc_targets_found(struct nfc_dev *dev, struct nfc_target *targets, |
179 | int ntargets); | |
180 | ||
1ed28f61 SO |
181 | int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, |
182 | u8 comm_mode, u8 rf_mode); | |
183 | ||
3e256b8f | 184 | #endif /* __NET_NFC_H */ |