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_ops { 52 int (*dev_up)(struct nfc_dev *dev); 53 int (*dev_down)(struct nfc_dev *dev); 54 int (*start_poll)(struct nfc_dev *dev, u32 protocols); 55 void (*stop_poll)(struct nfc_dev *dev); 56 int (*dep_link_up)(struct nfc_dev *dev, int target_idx, u8 comm_mode, 57 u8 *gb, size_t gb_len); 58 int (*dep_link_down)(struct nfc_dev *dev); 59 int (*activate_target)(struct nfc_dev *dev, u32 target_idx, 60 u32 protocol); 61 void (*deactivate_target)(struct nfc_dev *dev, u32 target_idx); 62 int (*data_exchange)(struct nfc_dev *dev, u32 target_idx, 63 struct sk_buff *skb, data_exchange_cb_t cb, 64 void *cb_context); 65 int (*check_presence)(struct nfc_dev *dev, u32 target_idx); 66 }; 67 68 #define NFC_TARGET_IDX_ANY -1 69 #define NFC_MAX_GT_LEN 48 70 #define NFC_TARGET_IDX_NONE 0xffffffff 71 72 struct nfc_target { 73 u32 idx; 74 u32 supported_protocols; 75 u16 sens_res; 76 u8 sel_res; 77 u8 nfcid1_len; 78 u8 nfcid1[NFC_NFCID1_MAXSIZE]; 79 u8 sensb_res_len; 80 u8 sensb_res[NFC_SENSB_RES_MAXSIZE]; 81 u8 sensf_res_len; 82 u8 sensf_res[NFC_SENSF_RES_MAXSIZE]; 83 u8 hci_reader_gate; 84 u8 logical_idx; 85 }; 86 87 struct nfc_genl_data { 88 u32 poll_req_pid; 89 struct mutex genl_data_mutex; 90 }; 91 92 struct nfc_dev { 93 unsigned int idx; 94 u32 target_next_idx; 95 struct nfc_target *targets; 96 int n_targets; 97 int targets_generation; 98 spinlock_t targets_lock; 99 struct device dev; 100 bool dev_up; 101 bool polling; 102 u32 activated_target_idx; 103 bool dep_link_up; 104 u32 dep_rf_mode; 105 struct nfc_genl_data genl_data; 106 u32 supported_protocols; 107 108 int tx_headroom; 109 int tx_tailroom; 110 111 struct timer_list check_pres_timer; 112 struct workqueue_struct *check_pres_wq; 113 struct work_struct check_pres_work; 114 115 struct nfc_ops *ops; 116 }; 117 #define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev) 118 119 extern struct class nfc_class; 120 121 struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, 122 u32 supported_protocols, 123 int tx_headroom, 124 int tx_tailroom); 125 126 /** 127 * nfc_free_device - free nfc device 128 * 129 * @dev: The nfc device to free 130 */ 131 static inline void nfc_free_device(struct nfc_dev *dev) 132 { 133 put_device(&dev->dev); 134 } 135 136 int nfc_register_device(struct nfc_dev *dev); 137 138 void nfc_unregister_device(struct nfc_dev *dev); 139 140 /** 141 * nfc_set_parent_dev - set the parent device 142 * 143 * @nfc_dev: The nfc device whose parent is being set 144 * @dev: The parent device 145 */ 146 static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev, 147 struct device *dev) 148 { 149 nfc_dev->dev.parent = dev; 150 } 151 152 /** 153 * nfc_set_drvdata - set driver specifc data 154 * 155 * @dev: The nfc device 156 * @data: Pointer to driver specifc data 157 */ 158 static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data) 159 { 160 dev_set_drvdata(&dev->dev, data); 161 } 162 163 /** 164 * nfc_get_drvdata - get driver specifc data 165 * 166 * @dev: The nfc device 167 */ 168 static inline void *nfc_get_drvdata(struct nfc_dev *dev) 169 { 170 return dev_get_drvdata(&dev->dev); 171 } 172 173 /** 174 * nfc_device_name - get the nfc device name 175 * 176 * @dev: The nfc device whose name to return 177 */ 178 static inline const char *nfc_device_name(struct nfc_dev *dev) 179 { 180 return dev_name(&dev->dev); 181 } 182 183 struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk, 184 unsigned int flags, unsigned int size, 185 unsigned int *err); 186 struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp); 187 188 int nfc_set_remote_general_bytes(struct nfc_dev *dev, 189 u8 *gt, u8 gt_len); 190 191 int nfc_targets_found(struct nfc_dev *dev, 192 struct nfc_target *targets, int ntargets); 193 int nfc_target_lost(struct nfc_dev *dev, u32 target_idx); 194 195 int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, 196 u8 comm_mode, u8 rf_mode); 197 198 #endif /* __NET_NFC_H */ 199