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2025cf9e | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
4b10884e TE |
2 | /* |
3 | * NFC Digital Protocol stack | |
4 | * Copyright (c) 2013, Intel Corporation. | |
4b10884e TE |
5 | */ |
6 | ||
7 | #ifndef __DIGITAL_H | |
8 | #define __DIGITAL_H | |
9 | ||
10 | #include <net/nfc/nfc.h> | |
11 | #include <net/nfc/digital.h> | |
12 | ||
2c66daec | 13 | #include <linux/crc-ccitt.h> |
8c0695e4 | 14 | #include <linux/crc-itu-t.h> |
2c66daec | 15 | |
c5da0e4a SO |
16 | #define PROTOCOL_ERR(req) pr_err("%d: NFC Digital Protocol error: %s\n", \ |
17 | __LINE__, req) | |
4b10884e | 18 | |
59ee2361 TE |
19 | #define DIGITAL_CMD_IN_SEND 0 |
20 | #define DIGITAL_CMD_TG_SEND 1 | |
21 | #define DIGITAL_CMD_TG_LISTEN 2 | |
22 | #define DIGITAL_CMD_TG_LISTEN_MDAA 3 | |
bf30a67c | 23 | #define DIGITAL_CMD_TG_LISTEN_MD 4 |
59ee2361 TE |
24 | |
25 | #define DIGITAL_MAX_HEADER_LEN 7 | |
26 | #define DIGITAL_CRC_LEN 2 | |
27 | ||
7d0911c0 TE |
28 | #define DIGITAL_SENSF_NFCID2_NFC_DEP_B1 0x01 |
29 | #define DIGITAL_SENSF_NFCID2_NFC_DEP_B2 0xFE | |
30 | ||
31 | #define DIGITAL_SENS_RES_NFC_DEP 0x0100 | |
32 | #define DIGITAL_SEL_RES_NFC_DEP 0x40 | |
33 | #define DIGITAL_SENSF_FELICA_SC 0xFFFF | |
34 | ||
2c66daec TE |
35 | #define DIGITAL_DRV_CAPS_IN_CRC(ddev) \ |
36 | ((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_IN_CRC) | |
37 | #define DIGITAL_DRV_CAPS_TG_CRC(ddev) \ | |
38 | ((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_TG_CRC) | |
39 | ||
40 | struct digital_data_exch { | |
41 | data_exchange_cb_t cb; | |
42 | void *cb_context; | |
43 | }; | |
44 | ||
59ee2361 TE |
45 | struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, |
46 | unsigned int len); | |
47 | ||
48 | int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type, | |
1c7a4c24 TE |
49 | struct sk_buff *skb, struct digital_tg_mdaa_params *params, |
50 | u16 timeout, nfc_digital_cmd_complete_t cmd_cb, | |
51 | void *cb_context); | |
59ee2361 TE |
52 | |
53 | int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param); | |
54 | static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev, | |
55 | struct sk_buff *skb, u16 timeout, | |
56 | nfc_digital_cmd_complete_t cmd_cb, | |
57 | void *cb_context) | |
58 | { | |
1c7a4c24 TE |
59 | return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, NULL, timeout, |
60 | cmd_cb, cb_context); | |
59ee2361 TE |
61 | } |
62 | ||
63 | void digital_poll_next_tech(struct nfc_digital_dev *ddev); | |
64 | ||
65 | int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech); | |
24734607 | 66 | int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech); |
8c0695e4 | 67 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech); |
a381d482 | 68 | int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech); |
59ee2361 | 69 | |
c813007f TE |
70 | int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev, |
71 | struct sk_buff *skb); | |
72 | int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev, | |
73 | struct sk_buff *skb); | |
74 | ||
2c66daec TE |
75 | int digital_target_found(struct nfc_digital_dev *ddev, |
76 | struct nfc_target *target, u8 protocol); | |
77 | ||
78 | int digital_in_recv_mifare_res(struct sk_buff *resp); | |
79 | ||
7d0911c0 TE |
80 | int digital_in_send_atr_req(struct nfc_digital_dev *ddev, |
81 | struct nfc_target *target, __u8 comm_mode, __u8 *gb, | |
82 | size_t gb_len); | |
83 | int digital_in_send_dep_req(struct nfc_digital_dev *ddev, | |
84 | struct nfc_target *target, struct sk_buff *skb, | |
85 | struct digital_data_exch *data_exch); | |
86 | ||
1c7a4c24 TE |
87 | int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param); |
88 | static inline int digital_tg_send_cmd(struct nfc_digital_dev *ddev, | |
89 | struct sk_buff *skb, u16 timeout, | |
90 | nfc_digital_cmd_complete_t cmd_cb, void *cb_context) | |
91 | { | |
92 | return digital_send_cmd(ddev, DIGITAL_CMD_TG_SEND, skb, NULL, timeout, | |
93 | cmd_cb, cb_context); | |
94 | } | |
95 | ||
96 | void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, | |
97 | struct sk_buff *resp); | |
98 | ||
99 | void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, | |
100 | struct sk_buff *resp); | |
101 | ||
102 | static inline int digital_tg_listen(struct nfc_digital_dev *ddev, u16 timeout, | |
103 | nfc_digital_cmd_complete_t cb, void *arg) | |
104 | { | |
105 | return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN, NULL, NULL, | |
106 | timeout, cb, arg); | |
107 | } | |
108 | ||
109 | void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg, | |
110 | struct sk_buff *resp); | |
111 | ||
112 | int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb); | |
113 | ||
114 | int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech); | |
115 | int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech); | |
bf30a67c MG |
116 | void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg, |
117 | struct sk_buff *resp); | |
1c7a4c24 | 118 | |
2c66daec TE |
119 | typedef u16 (*crc_func_t)(u16, const u8 *, size_t); |
120 | ||
121 | #define CRC_A_INIT 0x6363 | |
122 | #define CRC_B_INIT 0xFFFF | |
8c0695e4 | 123 | #define CRC_F_INIT 0x0000 |
2c66daec TE |
124 | |
125 | void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init, | |
126 | u8 bitwise_inv, u8 msb_first); | |
127 | ||
128 | static inline void digital_skb_add_crc_a(struct sk_buff *skb) | |
129 | { | |
130 | digital_skb_add_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0); | |
131 | } | |
132 | ||
133 | static inline void digital_skb_add_crc_b(struct sk_buff *skb) | |
134 | { | |
135 | digital_skb_add_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0); | |
136 | } | |
137 | ||
8c0695e4 TE |
138 | static inline void digital_skb_add_crc_f(struct sk_buff *skb) |
139 | { | |
140 | digital_skb_add_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1); | |
141 | } | |
142 | ||
2c66daec TE |
143 | static inline void digital_skb_add_crc_none(struct sk_buff *skb) |
144 | { | |
145 | return; | |
146 | } | |
147 | ||
148 | int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func, | |
149 | u16 crc_init, u8 bitwise_inv, u8 msb_first); | |
150 | ||
151 | static inline int digital_skb_check_crc_a(struct sk_buff *skb) | |
152 | { | |
153 | return digital_skb_check_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0); | |
154 | } | |
155 | ||
156 | static inline int digital_skb_check_crc_b(struct sk_buff *skb) | |
157 | { | |
158 | return digital_skb_check_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0); | |
159 | } | |
160 | ||
8c0695e4 TE |
161 | static inline int digital_skb_check_crc_f(struct sk_buff *skb) |
162 | { | |
163 | return digital_skb_check_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1); | |
164 | } | |
165 | ||
2c66daec TE |
166 | static inline int digital_skb_check_crc_none(struct sk_buff *skb) |
167 | { | |
168 | return 0; | |
169 | } | |
170 | ||
4b10884e | 171 | #endif /* __DIGITAL_H */ |