2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
5 * Copyright (C) 2011 Texas Instruments, Inc.
6 * Copyright (C) 2013 Intel Corporation. All rights reserved.
7 * Copyright (C) 2014 Marvell International Ltd.
9 * Written by Ilan Elias <ilane@ti.com>
12 * This file is based on hci_core.h, which was written
13 * by Maxim Krasnyansky.
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License version 2
17 * as published by the Free Software Foundation
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
32 #include <linux/interrupt.h>
33 #include <linux/skbuff.h>
35 #include <net/nfc/nfc.h>
36 #include <net/nfc/nci.h>
38 /* NCI device flags */
46 /* NCI device states */
50 NCI_W4_ALL_DISCOVERIES,
58 #define NCI_RESET_TIMEOUT 5000
59 #define NCI_INIT_TIMEOUT 5000
60 #define NCI_SET_CONFIG_TIMEOUT 5000
61 #define NCI_RF_DISC_TIMEOUT 5000
62 #define NCI_RF_DISC_SELECT_TIMEOUT 5000
63 #define NCI_RF_DEACTIVATE_TIMEOUT 30000
64 #define NCI_CMD_TIMEOUT 5000
65 #define NCI_DATA_TIMEOUT 700
70 int (*open)(struct nci_dev *ndev);
71 int (*close)(struct nci_dev *ndev);
72 int (*send)(struct nci_dev *ndev, struct sk_buff *skb);
73 int (*setup)(struct nci_dev *ndev);
74 __u32 (*get_rfprotocol)(struct nci_dev *ndev, __u8 rf_protocol);
75 int (*discover_se)(struct nci_dev *ndev);
76 int (*disable_se)(struct nci_dev *ndev, u32 se_idx);
77 int (*enable_se)(struct nci_dev *ndev, u32 se_idx);
78 int (*se_io)(struct nci_dev *ndev, u32 se_idx,
79 u8 *apdu, size_t apdu_length,
80 se_io_cb_t cb, void *cb_context);
83 #define NCI_MAX_SUPPORTED_RF_INTERFACES 4
84 #define NCI_MAX_DISCOVERED_TARGETS 10
85 #define NCI_MAX_NUM_NFCEE 255
86 #define NCI_MAX_CONN_ID 7
88 struct nci_conn_info {
89 struct list_head list;
90 __u8 id; /* can be an RF Discovery ID or an NFCEE ID */
92 __u8 max_pkt_payload_len;
95 __u8 initial_num_credits;
97 data_exchange_cb_t data_exchange_cb;
98 void *data_exchange_cb_context;
100 struct sk_buff *rx_skb;
103 #define NCI_INVALID_CONN_ID 0x80
105 /* NCI Core structures */
107 struct nfc_dev *nfc_dev;
119 struct list_head conn_info_list;
121 struct timer_list cmd_timer;
122 struct timer_list data_timer;
124 struct workqueue_struct *cmd_wq;
125 struct work_struct cmd_work;
127 struct workqueue_struct *rx_wq;
128 struct work_struct rx_work;
130 struct workqueue_struct *tx_wq;
131 struct work_struct tx_work;
133 struct sk_buff_head cmd_q;
134 struct sk_buff_head rx_q;
135 struct sk_buff_head tx_q;
137 struct mutex req_lock;
138 struct completion req_completion;
145 __u32 target_active_prot;
147 struct nfc_target targets[NCI_MAX_DISCOVERED_TARGETS];
150 /* received during NCI_OP_CORE_RESET_RSP */
153 /* received during NCI_OP_CORE_INIT_RSP */
155 __u8 num_supported_rf_interfaces;
156 __u8 supported_rf_interfaces
157 [NCI_MAX_SUPPORTED_RF_INTERFACES];
158 __u8 max_logical_connections;
159 __u16 max_routing_table_size;
160 __u8 max_ctrl_pkt_payload_len;
161 __u16 max_size_for_large_params;
163 __u32 manufact_specific_info;
165 /* Save RF Discovery ID or NFCEE ID under conn_create */
168 /* stored during nci_data_exchange */
169 struct sk_buff *rx_data_reassembly;
171 /* stored during intf_activated_ntf */
172 __u8 remote_gb[NFC_MAX_GT_LEN];
176 /* ----- NCI Devices ----- */
177 struct nci_dev *nci_allocate_device(struct nci_ops *ops,
178 __u32 supported_protocols,
181 void nci_free_device(struct nci_dev *ndev);
182 int nci_register_device(struct nci_dev *ndev);
183 void nci_unregister_device(struct nci_dev *ndev);
184 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
185 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val);
187 int nci_nfcee_discover(struct nci_dev *ndev, u8 action);
189 static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
195 skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
197 skb_reserve(skb, ndev->tx_headroom);
202 static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
204 nfc_set_parent_dev(ndev->nfc_dev, dev);
207 static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
209 ndev->driver_data = data;
212 static inline void *nci_get_drvdata(struct nci_dev *ndev)
214 return ndev->driver_data;
217 void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
218 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
219 void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
220 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
221 int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
222 void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
223 __u8 conn_id, int err);
224 void nci_clear_target_list(struct nci_dev *ndev);
226 /* ----- NCI requests ----- */
227 #define NCI_REQ_DONE 0
228 #define NCI_REQ_PEND 1
229 #define NCI_REQ_CANCELED 2
231 void nci_req_complete(struct nci_dev *ndev, int result);
232 struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
235 /* ----- NCI status code ----- */
236 int nci_to_errno(__u8 code);
238 /* ----- NCI over SPI acknowledge modes ----- */
239 #define NCI_SPI_CRC_DISABLED 0x00
240 #define NCI_SPI_CRC_ENABLED 0x01
242 /* ----- NCI SPI structures ----- */
244 struct nci_dev *ndev;
245 struct spi_device *spi;
247 unsigned int xfer_udelay; /* microseconds delay between
251 struct completion req_completion;
255 /* ----- NCI SPI ----- */
256 struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi,
257 u8 acknowledge_mode, unsigned int delay,
258 struct nci_dev *ndev);
259 int nci_spi_send(struct nci_spi *nspi,
260 struct completion *write_handshake_completion,
261 struct sk_buff *skb);
262 struct sk_buff *nci_spi_read(struct nci_spi *nspi);
264 #endif /* __NCI_CORE_H */