aboutsummaryrefslogtreecommitdiffstats
path: root/include/net/nfc/nci_core.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/net/nfc/nci_core.h')
-rw-r--r--include/net/nfc/nci_core.h183
1 files changed, 183 insertions, 0 deletions
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
new file mode 100644
index 000000000000..2563f3a95e67
--- /dev/null
+++ b/include/net/nfc/nci_core.h
@@ -0,0 +1,183 @@
1/*
2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
4 *
5 * Copyright (C) 2011 Texas Instruments, Inc.
6 *
7 * Written by Ilan Elias <ilane@ti.com>
8 *
9 * Acknowledgements:
10 * This file is based on hci_core.h, which was written
11 * by Maxim Krasnyansky.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2
15 * as published by the Free Software Foundation
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27
28#ifndef __NCI_CORE_H
29#define __NCI_CORE_H
30
31#include <linux/interrupt.h>
32#include <linux/skbuff.h>
33
34#include <net/nfc/nfc.h>
35#include <net/nfc/nci.h>
36
37/* NCI device state */
38enum {
39 NCI_INIT,
40 NCI_UP,
41 NCI_DISCOVERY,
42 NCI_POLL_ACTIVE,
43};
44
45/* NCI timeouts */
46#define NCI_RESET_TIMEOUT 5000
47#define NCI_INIT_TIMEOUT 5000
48#define NCI_RF_DISC_TIMEOUT 5000
49#define NCI_RF_DEACTIVATE_TIMEOUT 5000
50#define NCI_CMD_TIMEOUT 5000
51
52struct nci_dev;
53
54struct nci_ops {
55 int (*open)(struct nci_dev *ndev);
56 int (*close)(struct nci_dev *ndev);
57 int (*send)(struct sk_buff *skb);
58};
59
60#define NCI_MAX_SUPPORTED_RF_INTERFACES 4
61
62/* NCI Core structures */
63struct nci_dev {
64 struct nfc_dev *nfc_dev;
65 struct nci_ops *ops;
66
67 int tx_headroom;
68 int tx_tailroom;
69
70 unsigned long flags;
71
72 atomic_t cmd_cnt;
73 atomic_t credits_cnt;
74
75 struct timer_list cmd_timer;
76
77 struct workqueue_struct *cmd_wq;
78 struct work_struct cmd_work;
79
80 struct workqueue_struct *rx_wq;
81 struct work_struct rx_work;
82
83 struct workqueue_struct *tx_wq;
84 struct work_struct tx_work;
85
86 struct sk_buff_head cmd_q;
87 struct sk_buff_head rx_q;
88 struct sk_buff_head tx_q;
89
90 struct mutex req_lock;
91 struct completion req_completion;
92 __u32 req_status;
93 __u32 req_result;
94
95 void *driver_data;
96
97 __u32 poll_prots;
98 __u32 target_available_prots;
99 __u32 target_active_prot;
100
101 /* received during NCI_OP_CORE_RESET_RSP */
102 __u8 nci_ver;
103
104 /* received during NCI_OP_CORE_INIT_RSP */
105 __u32 nfcc_features;
106 __u8 num_supported_rf_interfaces;
107 __u8 supported_rf_interfaces
108 [NCI_MAX_SUPPORTED_RF_INTERFACES];
109 __u8 max_logical_connections;
110 __u16 max_routing_table_size;
111 __u8 max_control_packet_payload_length;
112 __u16 rf_sending_buffer_size;
113 __u16 rf_receiving_buffer_size;
114 __u16 manufacturer_id;
115
116 /* received during NCI_OP_CORE_CONN_CREATE_RSP for static conn 0 */
117 __u8 max_pkt_payload_size;
118 __u8 initial_num_credits;
119 __u8 conn_id;
120
121 /* stored during nci_data_exchange */
122 data_exchange_cb_t data_exchange_cb;
123 void *data_exchange_cb_context;
124 struct sk_buff *rx_data_reassembly;
125};
126
127/* ----- NCI Devices ----- */
128struct nci_dev *nci_allocate_device(struct nci_ops *ops,
129 __u32 supported_protocols,
130 int tx_headroom,
131 int tx_tailroom);
132void nci_free_device(struct nci_dev *ndev);
133int nci_register_device(struct nci_dev *ndev);
134void nci_unregister_device(struct nci_dev *ndev);
135int nci_recv_frame(struct sk_buff *skb);
136
137static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
138 unsigned int len,
139 gfp_t how)
140{
141 struct sk_buff *skb;
142
143 skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
144 if (skb)
145 skb_reserve(skb, ndev->tx_headroom);
146
147 return skb;
148}
149
150static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
151{
152 nfc_set_parent_dev(ndev->nfc_dev, dev);
153}
154
155static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
156{
157 ndev->driver_data = data;
158}
159
160static inline void *nci_get_drvdata(struct nci_dev *ndev)
161{
162 return ndev->driver_data;
163}
164
165void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
166void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
167void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
168int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
169int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
170void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
171 int err);
172
173/* ----- NCI requests ----- */
174#define NCI_REQ_DONE 0
175#define NCI_REQ_PEND 1
176#define NCI_REQ_CANCELED 2
177
178void nci_req_complete(struct nci_dev *ndev, int result);
179
180/* ----- NCI status code ----- */
181int nci_to_errno(__u8 code);
182
183#endif /* __NCI_CORE_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-30 19:38:37 -0500