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
86 /* NCI Core structures */
88 struct nfc_dev *nfc_dev;
100 struct timer_list cmd_timer;
101 struct timer_list data_timer;
103 struct workqueue_struct *cmd_wq;
104 struct work_struct cmd_work;
106 struct workqueue_struct *rx_wq;
107 struct work_struct rx_work;
109 struct workqueue_struct *tx_wq;
110 struct work_struct tx_work;
112 struct sk_buff_head cmd_q;
113 struct sk_buff_head rx_q;
114 struct sk_buff_head tx_q;
116 struct mutex req_lock;
117 struct completion req_completion;
124 __u32 target_active_prot;
126 struct nfc_target targets[NCI_MAX_DISCOVERED_TARGETS];
129 /* received during NCI_OP_CORE_RESET_RSP */
132 /* received during NCI_OP_CORE_INIT_RSP */
134 __u8 num_supported_rf_interfaces;
135 __u8 supported_rf_interfaces
136 [NCI_MAX_SUPPORTED_RF_INTERFACES];
137 __u8 max_logical_connections;
138 __u16 max_routing_table_size;
139 __u8 max_ctrl_pkt_payload_len;
140 __u16 max_size_for_large_params;
142 __u32 manufact_specific_info;
144 /* received during NCI_OP_RF_INTF_ACTIVATED_NTF */
145 __u8 max_data_pkt_payload_size;
146 __u8 initial_num_credits;
148 /* stored during nci_data_exchange */
149 data_exchange_cb_t data_exchange_cb;
150 void *data_exchange_cb_context;
151 struct sk_buff *rx_data_reassembly;
153 /* stored during intf_activated_ntf */
154 __u8 remote_gb[NFC_MAX_GT_LEN];
158 /* ----- NCI Devices ----- */
159 struct nci_dev *nci_allocate_device(struct nci_ops *ops,
160 __u32 supported_protocols,
163 void nci_free_device(struct nci_dev *ndev);
164 int nci_register_device(struct nci_dev *ndev);
165 void nci_unregister_device(struct nci_dev *ndev);
166 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
167 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val);
169 static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
175 skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
177 skb_reserve(skb, ndev->tx_headroom);
182 static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
184 nfc_set_parent_dev(ndev->nfc_dev, dev);
187 static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
189 ndev->driver_data = data;
192 static inline void *nci_get_drvdata(struct nci_dev *ndev)
194 return ndev->driver_data;
197 void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
198 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
199 void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
200 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
201 int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
202 void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
204 void nci_clear_target_list(struct nci_dev *ndev);
206 /* ----- NCI requests ----- */
207 #define NCI_REQ_DONE 0
208 #define NCI_REQ_PEND 1
209 #define NCI_REQ_CANCELED 2
211 void nci_req_complete(struct nci_dev *ndev, int result);
213 /* ----- NCI status code ----- */
214 int nci_to_errno(__u8 code);
216 /* ----- NCI over SPI acknowledge modes ----- */
217 #define NCI_SPI_CRC_DISABLED 0x00
218 #define NCI_SPI_CRC_ENABLED 0x01
220 /* ----- NCI SPI structures ----- */
222 struct nci_dev *ndev;
223 struct spi_device *spi;
225 unsigned int xfer_udelay; /* microseconds delay between
229 struct completion req_completion;
233 /* ----- NCI SPI ----- */
234 struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi,
235 u8 acknowledge_mode, unsigned int delay,
236 struct nci_dev *ndev);
237 int nci_spi_send(struct nci_spi *nspi,
238 struct completion *write_handshake_completion,
239 struct sk_buff *skb);
240 struct sk_buff *nci_spi_read(struct nci_spi *nspi);
242 #endif /* __NCI_CORE_H */