1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright (C) 2011 Intel Corporation. All rights reserved.
4 */
5
6 #ifndef __NET_HCI_H
7 #define __NET_HCI_H
8
9 #include <linux/skbuff.h>
10
11 #include <net/nfc/nfc.h>
12
13 struct nfc_hci_dev;
14
15 struct nfc_hci_ops {
16 int (*open) (struct nfc_hci_dev *hdev);
17 void (*close) (struct nfc_hci_dev *hdev);
18 int (*load_session) (struct nfc_hci_dev *hdev);
19 int (*hci_ready) (struct nfc_hci_dev *hdev);
20 /*
21 * xmit must always send the complete buffer before
22 * returning. Returned result must be 0 for success
23 * or negative for failure.
24 */
25 int (*xmit) (struct nfc_hci_dev *hdev, struct sk_buff *skb);
26 int (*start_poll) (struct nfc_hci_dev *hdev,
27 u32 im_protocols, u32 tm_protocols);
28 void (*stop_poll) (struct nfc_hci_dev *hdev);
29 int (*dep_link_up)(struct nfc_hci_dev *hdev, struct nfc_target *target,
30 u8 comm_mode, u8 *gb, size_t gb_len);
31 int (*dep_link_down)(struct nfc_hci_dev *hdev);
32 int (*target_from_gate) (struct nfc_hci_dev *hdev, u8 gate,
33 struct nfc_target *target);
34 int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,
35 struct nfc_target *target);
36 int (*im_transceive) (struct nfc_hci_dev *hdev,
37 struct nfc_target *target, struct sk_buff *skb,
38 data_exchange_cb_t cb, void *cb_context);
39 int (*tm_send)(struct nfc_hci_dev *hdev, struct sk_buff *skb);
40 int (*check_presence)(struct nfc_hci_dev *hdev,
41 struct nfc_target *target);
42 int (*event_received)(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
43 struct sk_buff *skb);
44 void (*cmd_received)(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
45 struct sk_buff *skb);
46 int (*fw_download)(struct nfc_hci_dev *hdev, const char *firmware_name);
47 int (*discover_se)(struct nfc_hci_dev *dev);
48 int (*enable_se)(struct nfc_hci_dev *dev, u32 se_idx);
49 int (*disable_se)(struct nfc_hci_dev *dev, u32 se_idx);
50 int (*se_io)(struct nfc_hci_dev *dev, u32 se_idx,
51 u8 *apdu, size_t apdu_length,
52 se_io_cb_t cb, void *cb_context);
53 };
54
55 /* Pipes */
56 #define NFC_HCI_DO_NOT_CREATE_PIPE 0x81
57 #define NFC_HCI_INVALID_PIPE 0x80
58 #define NFC_HCI_INVALID_GATE 0xFF
59 #define NFC_HCI_INVALID_HOST 0x80
60 #define NFC_HCI_LINK_MGMT_PIPE 0x00
61 #define NFC_HCI_ADMIN_PIPE 0x01
62
63 struct nfc_hci_gate {
64 u8 gate;
65 u8 pipe;
66 };
67
68 struct nfc_hci_pipe {
69 u8 gate;
70 u8 dest_host;
71 };
72
73 #define NFC_HCI_MAX_CUSTOM_GATES 50
74 /*
75 * According to specification 102 622 chapter 4.4 Pipes,
76 * the pipe identifier is 7 bits long.
77 */
78 #define NFC_HCI_MAX_PIPES 128
79 struct nfc_hci_init_data {
80 u8 gate_count;
81 struct nfc_hci_gate gates[NFC_HCI_MAX_CUSTOM_GATES];
82 char session_id[9];
83 };
84
85 typedef int (*xmit) (struct sk_buff *skb, void *cb_data);
86
87 #define NFC_HCI_MAX_GATES 256
88
89 /*
90 * These values can be specified by a driver to indicate it requires some
91 * adaptation of the HCI standard.
92 *
93 * NFC_HCI_QUIRK_SHORT_CLEAR - send HCI_ADM_CLEAR_ALL_PIPE cmd with no params
94 */
95 enum {
96 NFC_HCI_QUIRK_SHORT_CLEAR = 0,
97 };
98
99 struct nfc_hci_dev {
100 struct nfc_dev *ndev;
101
102 u32 max_data_link_payload;
103
104 bool shutting_down;
105
106 struct mutex msg_tx_mutex;
107
108 struct list_head msg_tx_queue;
109
110 struct work_struct msg_tx_work;
111
112 struct timer_list cmd_timer;
113 struct hci_msg *cmd_pending_msg;
114
115 struct sk_buff_head rx_hcp_frags;
116
117 struct work_struct msg_rx_work;
118
119 struct sk_buff_head msg_rx_queue;
120
121 struct nfc_hci_ops *ops;
122
123 struct nfc_llc *llc;
124
125 struct nfc_hci_init_data init_data;
126
127 void *clientdata;
128
129 u8 gate2pipe[NFC_HCI_MAX_GATES];
130 struct nfc_hci_pipe pipes[NFC_HCI_MAX_PIPES];
131
132 u8 sw_romlib;
133 u8 sw_patch;
134 u8 sw_flashlib_major;
135 u8 sw_flashlib_minor;
136
137 u8 hw_derivative;
138 u8 hw_version;
139 u8 hw_mpw;
140 u8 hw_software;
141 u8 hw_bsid;
142
143 int async_cb_type;
144 data_exchange_cb_t async_cb;
145 void *async_cb_context;
146
147 u8 *gb;
148 size_t gb_len;
149
150 unsigned long quirks;
151 };
152
153 /* hci device allocation */
154 struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
155 struct nfc_hci_init_data *init_data,
156 unsigned long quirks,
157 u32 protocols,
158 const char *llc_name,
159 int tx_headroom,
160 int tx_tailroom,
161 int max_link_payload);
162 void nfc_hci_free_device(struct nfc_hci_dev *hdev);
163
164 int nfc_hci_register_device(struct nfc_hci_dev *hdev);
165 void nfc_hci_unregister_device(struct nfc_hci_dev *hdev);
166
167 void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata);
168 void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev);
169
nfc_hci_set_vendor_cmds(struct nfc_hci_dev * hdev,struct nfc_vendor_cmd * cmds,int n_cmds)170 static inline int nfc_hci_set_vendor_cmds(struct nfc_hci_dev *hdev,
171 struct nfc_vendor_cmd *cmds,
172 int n_cmds)
173 {
174 return nfc_set_vendor_cmds(hdev->ndev, cmds, n_cmds);
175 }
176
177 void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err);
178
179 int nfc_hci_result_to_errno(u8 result);
180 void nfc_hci_reset_pipes(struct nfc_hci_dev *dev);
181 void nfc_hci_reset_pipes_per_host(struct nfc_hci_dev *hdev, u8 host);
182
183 /* Host IDs */
184 #define NFC_HCI_HOST_CONTROLLER_ID 0x00
185 #define NFC_HCI_TERMINAL_HOST_ID 0x01
186 #define NFC_HCI_UICC_HOST_ID 0x02
187
188 /* Host Controller Gates and registry indexes */
189 #define NFC_HCI_ADMIN_GATE 0x00
190 #define NFC_HCI_ADMIN_SESSION_IDENTITY 0x01
191 #define NFC_HCI_ADMIN_MAX_PIPE 0x02
192 #define NFC_HCI_ADMIN_WHITELIST 0x03
193 #define NFC_HCI_ADMIN_HOST_LIST 0x04
194
195 #define NFC_HCI_LOOPBACK_GATE 0x04
196
197 #define NFC_HCI_ID_MGMT_GATE 0x05
198 #define NFC_HCI_ID_MGMT_VERSION_SW 0x01
199 #define NFC_HCI_ID_MGMT_VERSION_HW 0x03
200 #define NFC_HCI_ID_MGMT_VENDOR_NAME 0x04
201 #define NFC_HCI_ID_MGMT_MODEL_ID 0x05
202 #define NFC_HCI_ID_MGMT_HCI_VERSION 0x02
203 #define NFC_HCI_ID_MGMT_GATES_LIST 0x06
204
205 #define NFC_HCI_LINK_MGMT_GATE 0x06
206 #define NFC_HCI_LINK_MGMT_REC_ERROR 0x01
207
208 #define NFC_HCI_RF_READER_B_GATE 0x11
209 #define NFC_HCI_RF_READER_B_PUPI 0x03
210 #define NFC_HCI_RF_READER_B_APPLICATION_DATA 0x04
211 #define NFC_HCI_RF_READER_B_AFI 0x02
212 #define NFC_HCI_RF_READER_B_HIGHER_LAYER_RESPONSE 0x01
213 #define NFC_HCI_RF_READER_B_HIGHER_LAYER_DATA 0x05
214
215 #define NFC_HCI_RF_READER_A_GATE 0x13
216 #define NFC_HCI_RF_READER_A_UID 0x02
217 #define NFC_HCI_RF_READER_A_ATQA 0x04
218 #define NFC_HCI_RF_READER_A_APPLICATION_DATA 0x05
219 #define NFC_HCI_RF_READER_A_SAK 0x03
220 #define NFC_HCI_RF_READER_A_FWI_SFGT 0x06
221 #define NFC_HCI_RF_READER_A_DATARATE_MAX 0x01
222
223 #define NFC_HCI_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
224 #define NFC_HCI_TYPE_A_SEL_PROT_MIFARE 0
225 #define NFC_HCI_TYPE_A_SEL_PROT_ISO14443 1
226 #define NFC_HCI_TYPE_A_SEL_PROT_DEP 2
227 #define NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP 3
228
229 /* Generic events */
230 #define NFC_HCI_EVT_HCI_END_OF_OPERATION 0x01
231 #define NFC_HCI_EVT_POST_DATA 0x02
232 #define NFC_HCI_EVT_HOT_PLUG 0x03
233
234 /* Generic commands */
235 #define NFC_HCI_ANY_SET_PARAMETER 0x01
236 #define NFC_HCI_ANY_GET_PARAMETER 0x02
237 #define NFC_HCI_ANY_OPEN_PIPE 0x03
238 #define NFC_HCI_ANY_CLOSE_PIPE 0x04
239
240 /* Reader RF gates events */
241 #define NFC_HCI_EVT_READER_REQUESTED 0x10
242 #define NFC_HCI_EVT_END_OPERATION 0x11
243
244 /* Reader Application gate events */
245 #define NFC_HCI_EVT_TARGET_DISCOVERED 0x10
246
247 /* receiving messages from lower layer */
248 void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
249 struct sk_buff *skb);
250 void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
251 struct sk_buff *skb);
252 void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
253 struct sk_buff *skb);
254 void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb);
255
256 /* connecting to gates and sending hci instructions */
257 int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate,
258 u8 pipe);
259 int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate);
260 int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev);
261 int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
262 struct sk_buff **skb);
263 int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
264 const u8 *param, size_t param_len);
265 int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
266 const u8 *param, size_t param_len, struct sk_buff **skb);
267 int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
268 const u8 *param, size_t param_len,
269 data_exchange_cb_t cb, void *cb_context);
270 int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
271 const u8 *param, size_t param_len);
272 int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate);
273 u32 nfc_hci_sak_to_protocol(u8 sak);
274
275 #endif /* __NET_HCI_H */
276