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/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 37 /** 38 * data_exchange_cb_t - Definition of nfc_data_exchange callback 39 * 40 * @context: nfc_data_exchange cb_context parameter 41 * @skb: response data 42 * @err: If an error has occurred during data exchange, it is the 43 * error number. Zero means no error. 44 * 45 * When a rx or tx package is lost or corrupted or the target gets out 46 * of the operating field, err is -EIO. 47 */ 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, u32 protocols); 57 void (*stop_poll)(struct nfc_dev *dev); 58 int (*dep_link_up)(struct nfc_dev *dev, struct nfc_target *target, 59 u8 comm_mode, u8 *gb, size_t gb_len); 60 int (*dep_link_down)(struct nfc_dev *dev); 61 int (*activate_target)(struct nfc_dev *dev, struct nfc_target *target, 62 u32 protocol); 63 void (*deactivate_target)(struct nfc_dev *dev, 64 struct nfc_target *target); 65 int (*data_exchange)(struct nfc_dev *dev, struct nfc_target *target, 66 struct sk_buff *skb, data_exchange_cb_t cb, 67 void *cb_context); 68 int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target); 69 }; 70 71 #define NFC_TARGET_IDX_ANY -1 72 #define NFC_MAX_GT_LEN 48 73 74 struct nfc_target { 75 u32 idx; 76 u32 supported_protocols; 77 u16 sens_res; 78 u8 sel_res; 79 u8 nfcid1_len; 80 u8 nfcid1[NFC_NFCID1_MAXSIZE]; 81 u8 sensb_res_len; 82 u8 sensb_res[NFC_SENSB_RES_MAXSIZE]; 83 u8 sensf_res_len; 84 u8 sensf_res[NFC_SENSF_RES_MAXSIZE]; 85 u8 hci_reader_gate; 86 u8 logical_idx; 87 }; 88 89 struct nfc_genl_data { 90 u32 poll_req_pid; 91 struct mutex genl_data_mutex; 92 }; 93 94 struct nfc_dev { 95 unsigned int idx; 96 u32 target_next_idx; 97 struct nfc_target *targets; 98 int n_targets; 99 int targets_generation; 100 struct device dev; 101 bool dev_up; 102 bool polling; 103 struct nfc_target *active_target; 104 bool dep_link_up; 105 u32 dep_rf_mode; 106 struct nfc_genl_data genl_data; 107 u32 supported_protocols; 108 109 int tx_headroom; 110 int tx_tailroom; 111 112 struct timer_list check_pres_timer; 113 struct workqueue_struct *check_pres_wq; 114 struct work_struct check_pres_work; 115 116 struct nfc_ops *ops; 117 }; 118 #define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev) 119 120 extern struct class nfc_class; 121 122 struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, 123 u32 supported_protocols, 124 int tx_headroom, 125 int tx_tailroom); 126 127 /** 128 * nfc_free_device - free nfc device 129 * 130 * @dev: The nfc device to free 131 */ 132 static inline void nfc_free_device(struct nfc_dev *dev) 133 { 134 put_device(&dev->dev); 135 } 136 137 int nfc_register_device(struct nfc_dev *dev); 138 139 void nfc_unregister_device(struct nfc_dev *dev); 140 141 /** 142 * nfc_set_parent_dev - set the parent device 143 * 144 * @nfc_dev: The nfc device whose parent is being set 145 * @dev: The parent device 146 */ 147 static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev, 148 struct device *dev) 149 { 150 nfc_dev->dev.parent = dev; 151 } 152 153 /** 154 * nfc_set_drvdata - set driver specifc data 155 * 156 * @dev: The nfc device 157 * @data: Pointer to driver specifc data 158 */ 159 static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data) 160 { 161 dev_set_drvdata(&dev->dev, data); 162 } 163 164 /** 165 * nfc_get_drvdata - get driver specifc data 166 * 167 * @dev: The nfc device 168 */ 169 static inline void *nfc_get_drvdata(struct nfc_dev *dev) 170 { 171 return dev_get_drvdata(&dev->dev); 172 } 173 174 /** 175 * nfc_device_name - get the nfc device name 176 * 177 * @dev: The nfc device whose name to return 178 */ 179 static inline const char *nfc_device_name(struct nfc_dev *dev) 180 { 181 return dev_name(&dev->dev); 182 } 183 184 struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk, 185 unsigned int flags, unsigned int size, 186 unsigned int *err); 187 struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp); 188 189 int nfc_set_remote_general_bytes(struct nfc_dev *dev, 190 u8 *gt, u8 gt_len); 191 192 int nfc_targets_found(struct nfc_dev *dev, 193 struct nfc_target *targets, int ntargets); 194 int nfc_target_lost(struct nfc_dev *dev, u32 target_idx); 195 196 int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, 197 u8 comm_mode, u8 rf_mode); 198 199 #endif /* __NET_NFC_H */ 200