1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * The NFC Controller Interface is the communication protocol between an
4 * NFC Controller (NFCC) and a Device Host (DH).
6 * Copyright (C) 2011 Texas Instruments, Inc.
7 * Copyright (C) 2013 Intel Corporation. All rights reserved.
8 * Copyright (C) 2014 Marvell International Ltd.
10 * Written by Ilan Elias <ilane@ti.com>
13 * This file is based on hci_core.h, which was written
14 * by Maxim Krasnyansky.
20 #include <linux/interrupt.h>
21 #include <linux/skbuff.h>
22 #include <linux/tty.h>
24 #include <net/nfc/nfc.h>
25 #include <net/nfc/nci.h>
27 /* NCI device flags */
35 /* NCI device states */
39 NCI_W4_ALL_DISCOVERIES,
47 #define NCI_RESET_TIMEOUT 5000
48 #define NCI_INIT_TIMEOUT 5000
49 #define NCI_SET_CONFIG_TIMEOUT 5000
50 #define NCI_RF_DISC_TIMEOUT 5000
51 #define NCI_RF_DISC_SELECT_TIMEOUT 5000
52 #define NCI_RF_DEACTIVATE_TIMEOUT 30000
53 #define NCI_CMD_TIMEOUT 5000
54 #define NCI_DATA_TIMEOUT 700
58 struct nci_driver_ops {
60 int (*rsp)(struct nci_dev *dev, struct sk_buff *skb);
61 int (*ntf)(struct nci_dev *dev, struct sk_buff *skb);
65 int (*init)(struct nci_dev *ndev);
66 int (*open)(struct nci_dev *ndev);
67 int (*close)(struct nci_dev *ndev);
68 int (*send)(struct nci_dev *ndev, struct sk_buff *skb);
69 int (*setup)(struct nci_dev *ndev);
70 int (*post_setup)(struct nci_dev *ndev);
71 int (*fw_download)(struct nci_dev *ndev, const char *firmware_name);
72 __u32 (*get_rfprotocol)(struct nci_dev *ndev, __u8 rf_protocol);
73 int (*discover_se)(struct nci_dev *ndev);
74 int (*disable_se)(struct nci_dev *ndev, u32 se_idx);
75 int (*enable_se)(struct nci_dev *ndev, u32 se_idx);
76 int (*se_io)(struct nci_dev *ndev, u32 se_idx,
77 u8 *apdu, size_t apdu_length,
78 se_io_cb_t cb, void *cb_context);
79 int (*hci_load_session)(struct nci_dev *ndev);
80 void (*hci_event_received)(struct nci_dev *ndev, u8 pipe, u8 event,
82 void (*hci_cmd_received)(struct nci_dev *ndev, u8 pipe, u8 cmd,
85 const struct nci_driver_ops *prop_ops;
88 const struct nci_driver_ops *core_ops;
92 #define NCI_MAX_SUPPORTED_RF_INTERFACES 4
93 #define NCI_MAX_DISCOVERED_TARGETS 10
94 #define NCI_MAX_NUM_NFCEE 255
95 #define NCI_MAX_CONN_ID 7
96 #define NCI_MAX_PROPRIETARY_CMD 64
98 struct nci_conn_info {
99 struct list_head list;
100 /* NCI specification 4.4.2 Connection Creation
101 * The combination of destination type and destination specific
102 * parameters shall uniquely identify a single destination for the
105 struct dest_spec_params *dest_params;
108 __u8 max_pkt_payload_len;
110 atomic_t credits_cnt;
111 __u8 initial_num_credits;
113 data_exchange_cb_t data_exchange_cb;
114 void *data_exchange_cb_context;
116 struct sk_buff *rx_skb;
119 #define NCI_INVALID_CONN_ID 0x80
121 #define NCI_HCI_ANY_OPEN_PIPE 0x03
124 #define NCI_HCI_ADMIN_GATE 0x00
125 #define NCI_HCI_LOOPBACK_GATE 0x04
126 #define NCI_HCI_IDENTITY_MGMT_GATE 0x05
127 #define NCI_HCI_LINK_MGMT_GATE 0x06
130 #define NCI_HCI_LINK_MGMT_PIPE 0x00
131 #define NCI_HCI_ADMIN_PIPE 0x01
133 /* Generic responses */
134 #define NCI_HCI_ANY_OK 0x00
135 #define NCI_HCI_ANY_E_NOT_CONNECTED 0x01
136 #define NCI_HCI_ANY_E_CMD_PAR_UNKNOWN 0x02
137 #define NCI_HCI_ANY_E_NOK 0x03
138 #define NCI_HCI_ANY_E_PIPES_FULL 0x04
139 #define NCI_HCI_ANY_E_REG_PAR_UNKNOWN 0x05
140 #define NCI_HCI_ANY_E_PIPE_NOT_OPENED 0x06
141 #define NCI_HCI_ANY_E_CMD_NOT_SUPPORTED 0x07
142 #define NCI_HCI_ANY_E_INHIBITED 0x08
143 #define NCI_HCI_ANY_E_TIMEOUT 0x09
144 #define NCI_HCI_ANY_E_REG_ACCESS_DENIED 0x0a
145 #define NCI_HCI_ANY_E_PIPE_ACCESS_DENIED 0x0b
147 #define NCI_HCI_DO_NOT_OPEN_PIPE 0x81
148 #define NCI_HCI_INVALID_PIPE 0x80
149 #define NCI_HCI_INVALID_GATE 0xFF
150 #define NCI_HCI_INVALID_HOST 0x80
152 #define NCI_HCI_MAX_CUSTOM_GATES 50
154 * According to specification 102 622 chapter 4.4 Pipes,
155 * the pipe identifier is 7 bits long.
157 #define NCI_HCI_MAX_PIPES 128
159 struct nci_hci_gate {
165 struct nci_hci_pipe {
170 struct nci_hci_init_data {
172 struct nci_hci_gate gates[NCI_HCI_MAX_CUSTOM_GATES];
176 #define NCI_HCI_MAX_GATES 256
180 struct nci_dev *ndev;
181 struct nci_conn_info *conn_info;
183 struct nci_hci_init_data init_data;
184 struct nci_hci_pipe pipes[NCI_HCI_MAX_PIPES];
185 u8 gate2pipe[NCI_HCI_MAX_GATES];
189 struct sk_buff_head rx_hcp_frags;
190 struct work_struct msg_rx_work;
191 struct sk_buff_head msg_rx_queue;
194 /* NCI Core structures */
196 struct nfc_dev *nfc_dev;
197 const struct nci_ops *ops;
198 struct nci_hci_dev *hci_dev;
209 struct list_head conn_info_list;
210 struct nci_conn_info *rf_conn_info;
212 struct timer_list cmd_timer;
213 struct timer_list data_timer;
215 struct workqueue_struct *cmd_wq;
216 struct work_struct cmd_work;
218 struct workqueue_struct *rx_wq;
219 struct work_struct rx_work;
221 struct workqueue_struct *tx_wq;
222 struct work_struct tx_work;
224 struct sk_buff_head cmd_q;
225 struct sk_buff_head rx_q;
226 struct sk_buff_head tx_q;
228 struct mutex req_lock;
229 struct completion req_completion;
236 __u32 target_active_prot;
238 struct nfc_target targets[NCI_MAX_DISCOVERED_TARGETS];
241 /* received during NCI_OP_CORE_RESET_RSP */
244 /* received during NCI_OP_CORE_INIT_RSP */
246 __u8 num_supported_rf_interfaces;
247 __u8 supported_rf_interfaces
248 [NCI_MAX_SUPPORTED_RF_INTERFACES];
249 __u8 max_logical_connections;
250 __u16 max_routing_table_size;
251 __u8 max_ctrl_pkt_payload_len;
252 __u16 max_size_for_large_params;
254 __u32 manufact_specific_info;
256 /* Save RF Discovery ID or NFCEE ID under conn_create */
257 struct dest_spec_params cur_params;
258 /* Save destination type under conn_create */
261 /* stored during nci_data_exchange */
262 struct sk_buff *rx_data_reassembly;
264 /* stored during intf_activated_ntf */
265 __u8 remote_gb[NFC_MAX_GT_LEN];
269 /* ----- NCI Devices ----- */
270 struct nci_dev *nci_allocate_device(const struct nci_ops *ops,
271 __u32 supported_protocols,
274 void nci_free_device(struct nci_dev *ndev);
275 int nci_register_device(struct nci_dev *ndev);
276 void nci_unregister_device(struct nci_dev *ndev);
277 int nci_request(struct nci_dev *ndev,
278 void (*req)(struct nci_dev *ndev,
280 unsigned long opt, __u32 timeout);
281 int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len,
282 const __u8 *payload);
283 int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len,
284 const __u8 *payload);
285 int nci_core_reset(struct nci_dev *ndev);
286 int nci_core_init(struct nci_dev *ndev);
288 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
289 int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb);
290 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val);
292 int nci_nfcee_discover(struct nci_dev *ndev, u8 action);
293 int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode);
294 int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
295 u8 number_destination_params,
297 const struct core_conn_create_dest_spec_params *params);
298 int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id);
299 int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len,
300 struct sk_buff **resp);
302 struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev);
303 void nci_hci_deallocate(struct nci_dev *ndev);
304 int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event,
305 const u8 *param, size_t param_len);
306 int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate,
307 u8 cmd, const u8 *param, size_t param_len,
308 struct sk_buff **skb);
309 int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe);
310 int nci_hci_connect_gate(struct nci_dev *ndev, u8 dest_host,
311 u8 dest_gate, u8 pipe);
312 int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,
313 const u8 *param, size_t param_len);
314 int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx,
315 struct sk_buff **skb);
316 int nci_hci_clear_all_pipes(struct nci_dev *ndev);
317 int nci_hci_dev_session_init(struct nci_dev *ndev);
319 static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
325 skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
327 skb_reserve(skb, ndev->tx_headroom);
332 static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
334 nfc_set_parent_dev(ndev->nfc_dev, dev);
337 static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
339 ndev->driver_data = data;
342 static inline void *nci_get_drvdata(struct nci_dev *ndev)
344 return ndev->driver_data;
347 static inline int nci_set_vendor_cmds(struct nci_dev *ndev,
348 const struct nfc_vendor_cmd *cmds,
351 return nfc_set_vendor_cmds(ndev->nfc_dev, cmds, n_cmds);
354 void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
355 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
356 int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
357 struct sk_buff *skb);
358 int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
359 struct sk_buff *skb);
360 int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
361 struct sk_buff *skb);
362 int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
363 struct sk_buff *skb);
364 void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
365 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, const void *payload);
366 int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
367 int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id);
368 void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
369 __u8 conn_id, int err);
370 void nci_hci_data_received_cb(void *context, struct sk_buff *skb, int err);
372 void nci_clear_target_list(struct nci_dev *ndev);
374 /* ----- NCI requests ----- */
375 #define NCI_REQ_DONE 0
376 #define NCI_REQ_PEND 1
377 #define NCI_REQ_CANCELED 2
379 void nci_req_complete(struct nci_dev *ndev, int result);
380 struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
382 int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
383 const struct dest_spec_params *params);
385 /* ----- NCI status code ----- */
386 int nci_to_errno(__u8 code);
388 /* ----- NCI over SPI acknowledge modes ----- */
389 #define NCI_SPI_CRC_DISABLED 0x00
390 #define NCI_SPI_CRC_ENABLED 0x01
392 /* ----- NCI SPI structures ----- */
394 struct nci_dev *ndev;
395 struct spi_device *spi;
397 unsigned int xfer_udelay; /* microseconds delay between
400 unsigned int xfer_speed_hz; /*
401 * SPI clock frequency
407 struct completion req_completion;
411 /* ----- NCI SPI ----- */
412 struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi,
413 u8 acknowledge_mode, unsigned int delay,
414 struct nci_dev *ndev);
415 int nci_spi_send(struct nci_spi *nspi,
416 struct completion *write_handshake_completion,
417 struct sk_buff *skb);
418 struct sk_buff *nci_spi_read(struct nci_spi *nspi);
420 /* ----- NCI UART ---- */
423 #define NCIUARTSETDRIVER _IOW('U', 0, char *)
425 enum nci_uart_driver {
426 NCI_UART_DRIVER_MARVELL = 0,
432 struct nci_uart_ops {
433 int (*open)(struct nci_uart *nci_uart);
434 void (*close)(struct nci_uart *nci_uart);
435 int (*recv)(struct nci_uart *nci_uart, struct sk_buff *skb);
436 int (*send)(struct nci_uart *nci_uart, struct sk_buff *skb);
437 void (*tx_start)(struct nci_uart *nci_uart);
438 void (*tx_done)(struct nci_uart *nci_uart);
442 struct module *owner;
443 struct nci_uart_ops ops;
445 enum nci_uart_driver driver;
448 struct nci_dev *ndev;
450 struct work_struct write_work;
451 struct tty_struct *tty;
452 unsigned long tx_state;
453 struct sk_buff_head tx_q;
454 struct sk_buff *tx_skb;
455 struct sk_buff *rx_skb;
460 int nci_uart_register(struct nci_uart *nu);
461 void nci_uart_unregister(struct nci_uart *nu);
462 void nci_uart_set_config(struct nci_uart *nu, int baudrate, int flow_ctrl);
464 #endif /* __NCI_CORE_H */