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, 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); 61 int (*dep_link_down)(struct nfc_dev *dev); 62 int (*activate_target)(struct nfc_dev *dev, struct nfc_target *target, 63 u32 protocol); 64 void (*deactivate_target)(struct nfc_dev *dev, 65 struct nfc_target *target); 66 int (*im_transceive)(struct nfc_dev *dev, struct nfc_target *target, 67 struct sk_buff *skb, data_exchange_cb_t cb, 68 void *cb_context); 69 int (*tm_send)(struct nfc_dev *dev, struct sk_buff *skb); 70 int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target); 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 { 78 u32 idx; 79 u32 supported_protocols; 80 u16 sens_res; 81 u8 sel_res; 82 u8 nfcid1_len; 83 u8 nfcid1[NFC_NFCID1_MAXSIZE]; 84 u8 sensb_res_len; 85 u8 sensb_res[NFC_SENSB_RES_MAXSIZE]; 86 u8 sensf_res_len; 87 u8 sensf_res[NFC_SENSF_RES_MAXSIZE]; 88 u8 hci_reader_gate; 89 u8 logical_idx; 90 }; 91 92 struct nfc_genl_data { 93 u32 poll_req_portid; 94 struct mutex genl_data_mutex; 95 }; 96 97 struct nfc_dev { 98 unsigned int idx; 99 u32 target_next_idx; 100 struct nfc_target *targets; 101 int n_targets; 102 int targets_generation; 103 struct device dev; 104 bool dev_up; 105 u8 rf_mode; 106 bool polling; 107 struct nfc_target *active_target; 108 bool dep_link_up; 109 struct nfc_genl_data genl_data; 110 u32 supported_protocols; 111 112 int tx_headroom; 113 int tx_tailroom; 114 115 struct timer_list check_pres_timer; 116 struct work_struct check_pres_work; 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, 125 u32 supported_protocols, 126 int tx_headroom, 127 int tx_tailroom); 128 129 /** 130 * nfc_free_device - free nfc device 131 * 132 * @dev: The nfc device to free 133 */ 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); 142 143 /** 144 * nfc_set_parent_dev - set the parent device 145 * 146 * @nfc_dev: The nfc device whose parent is being set 147 * @dev: The parent device 148 */ 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 } 154 155 /** 156 * nfc_set_drvdata - set driver specifc data 157 * 158 * @dev: The nfc device 159 * @data: Pointer to driver specifc data 160 */ 161 static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data) 162 { 163 dev_set_drvdata(&dev->dev, data); 164 } 165 166 /** 167 * nfc_get_drvdata - get driver specifc data 168 * 169 * @dev: The nfc device 170 */ 171 static inline void *nfc_get_drvdata(struct nfc_dev *dev) 172 { 173 return dev_get_drvdata(&dev->dev); 174 } 175 176 /** 177 * nfc_device_name - get the nfc device name 178 * 179 * @dev: The nfc device whose name to return 180 */ 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); 190 191 int nfc_set_remote_general_bytes(struct nfc_dev *dev, 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 */ 210