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4b10884e TE |
1 | /* |
2 | * NFC Digital Protocol stack | |
3 | * Copyright (c) 2013, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | */ | |
15 | ||
16 | #ifndef __DIGITAL_H | |
17 | #define __DIGITAL_H | |
18 | ||
19 | #include <net/nfc/nfc.h> | |
20 | #include <net/nfc/digital.h> | |
21 | ||
2c66daec | 22 | #include <linux/crc-ccitt.h> |
8c0695e4 | 23 | #include <linux/crc-itu-t.h> |
2c66daec | 24 | |
4b10884e TE |
25 | #define PR_DBG(fmt, ...) pr_debug("%s: " fmt "\n", __func__, ##__VA_ARGS__) |
26 | #define PR_ERR(fmt, ...) pr_err("%s: " fmt "\n", __func__, ##__VA_ARGS__) | |
27 | #define PROTOCOL_ERR(req) pr_err("%s:%d: NFC Digital Protocol error: %s\n", \ | |
28 | __func__, __LINE__, req) | |
29 | ||
59ee2361 TE |
30 | #define DIGITAL_CMD_IN_SEND 0 |
31 | #define DIGITAL_CMD_TG_SEND 1 | |
32 | #define DIGITAL_CMD_TG_LISTEN 2 | |
33 | #define DIGITAL_CMD_TG_LISTEN_MDAA 3 | |
34 | ||
35 | #define DIGITAL_MAX_HEADER_LEN 7 | |
36 | #define DIGITAL_CRC_LEN 2 | |
37 | ||
2c66daec TE |
38 | #define DIGITAL_DRV_CAPS_IN_CRC(ddev) \ |
39 | ((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_IN_CRC) | |
40 | #define DIGITAL_DRV_CAPS_TG_CRC(ddev) \ | |
41 | ((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_TG_CRC) | |
42 | ||
43 | struct digital_data_exch { | |
44 | data_exchange_cb_t cb; | |
45 | void *cb_context; | |
46 | }; | |
47 | ||
59ee2361 TE |
48 | struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, |
49 | unsigned int len); | |
50 | ||
51 | int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type, | |
52 | struct sk_buff *skb, u16 timeout, | |
53 | nfc_digital_cmd_complete_t cmd_cb, void *cb_context); | |
54 | ||
55 | int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param); | |
56 | static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev, | |
57 | struct sk_buff *skb, u16 timeout, | |
58 | nfc_digital_cmd_complete_t cmd_cb, | |
59 | void *cb_context) | |
60 | { | |
61 | return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, timeout, cmd_cb, | |
62 | cb_context); | |
63 | } | |
64 | ||
65 | void digital_poll_next_tech(struct nfc_digital_dev *ddev); | |
66 | ||
67 | int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech); | |
8c0695e4 | 68 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech); |
59ee2361 | 69 | |
2c66daec TE |
70 | int digital_target_found(struct nfc_digital_dev *ddev, |
71 | struct nfc_target *target, u8 protocol); | |
72 | ||
73 | int digital_in_recv_mifare_res(struct sk_buff *resp); | |
74 | ||
75 | typedef u16 (*crc_func_t)(u16, const u8 *, size_t); | |
76 | ||
77 | #define CRC_A_INIT 0x6363 | |
78 | #define CRC_B_INIT 0xFFFF | |
8c0695e4 | 79 | #define CRC_F_INIT 0x0000 |
2c66daec TE |
80 | |
81 | void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init, | |
82 | u8 bitwise_inv, u8 msb_first); | |
83 | ||
84 | static inline void digital_skb_add_crc_a(struct sk_buff *skb) | |
85 | { | |
86 | digital_skb_add_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0); | |
87 | } | |
88 | ||
89 | static inline void digital_skb_add_crc_b(struct sk_buff *skb) | |
90 | { | |
91 | digital_skb_add_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0); | |
92 | } | |
93 | ||
8c0695e4 TE |
94 | static inline void digital_skb_add_crc_f(struct sk_buff *skb) |
95 | { | |
96 | digital_skb_add_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1); | |
97 | } | |
98 | ||
2c66daec TE |
99 | static inline void digital_skb_add_crc_none(struct sk_buff *skb) |
100 | { | |
101 | return; | |
102 | } | |
103 | ||
104 | int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func, | |
105 | u16 crc_init, u8 bitwise_inv, u8 msb_first); | |
106 | ||
107 | static inline int digital_skb_check_crc_a(struct sk_buff *skb) | |
108 | { | |
109 | return digital_skb_check_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0); | |
110 | } | |
111 | ||
112 | static inline int digital_skb_check_crc_b(struct sk_buff *skb) | |
113 | { | |
114 | return digital_skb_check_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0); | |
115 | } | |
116 | ||
8c0695e4 TE |
117 | static inline int digital_skb_check_crc_f(struct sk_buff *skb) |
118 | { | |
119 | return digital_skb_check_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1); | |
120 | } | |
121 | ||
2c66daec TE |
122 | static inline int digital_skb_check_crc_none(struct sk_buff *skb) |
123 | { | |
124 | return 0; | |
125 | } | |
126 | ||
4b10884e | 127 | #endif /* __DIGITAL_H */ |