1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * NFC Digital Protocol stack |
4 | * Copyright (c) 2013, Intel Corporation. |
5 | */ |
6 | |
7 | #ifndef __DIGITAL_H |
8 | #define __DIGITAL_H |
9 | |
10 | #include <net/nfc/nfc.h> |
11 | #include <net/nfc/digital.h> |
12 | |
13 | #include <linux/crc-ccitt.h> |
14 | #include <linux/crc-itu-t.h> |
15 | |
16 | #define PROTOCOL_ERR(req) pr_err("%d: NFC Digital Protocol error: %s\n", \ |
17 | __LINE__, req) |
18 | |
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 |
23 | #define DIGITAL_CMD_TG_LISTEN_MD 4 |
24 | |
25 | #define 7 |
26 | #define DIGITAL_CRC_LEN 2 |
27 | |
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 | |
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 | |
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, |
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); |
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 | { |
59 | return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, NULL, timeout, |
60 | cmd_cb, cb_context); |
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); |
66 | int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech); |
67 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech); |
68 | int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech); |
69 | |
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 | |
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 | |
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 | |
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, cmd_cb: cb, cb_context: 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); |
116 | void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg, |
117 | struct sk_buff *resp); |
118 | |
119 | typedef u16 (*crc_func_t)(u16, const u8 *, size_t); |
120 | |
121 | #define CRC_A_INIT 0x6363 |
122 | #define CRC_B_INIT 0xFFFF |
123 | #define CRC_F_INIT 0x0000 |
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_func: crc_ccitt, CRC_A_INIT, bitwise_inv: 0, msb_first: 0); |
131 | } |
132 | |
133 | static inline void digital_skb_add_crc_b(struct sk_buff *skb) |
134 | { |
135 | digital_skb_add_crc(skb, crc_func: crc_ccitt, CRC_B_INIT, bitwise_inv: 1, msb_first: 0); |
136 | } |
137 | |
138 | static inline void digital_skb_add_crc_f(struct sk_buff *skb) |
139 | { |
140 | digital_skb_add_crc(skb, crc_func: crc_itu_t, CRC_F_INIT, bitwise_inv: 0, msb_first: 1); |
141 | } |
142 | |
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_func: crc_ccitt, CRC_A_INIT, bitwise_inv: 0, msb_first: 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_func: crc_ccitt, CRC_B_INIT, bitwise_inv: 1, msb_first: 0); |
159 | } |
160 | |
161 | static inline int digital_skb_check_crc_f(struct sk_buff *skb) |
162 | { |
163 | return digital_skb_check_crc(skb, crc_func: crc_itu_t, CRC_F_INIT, bitwise_inv: 0, msb_first: 1); |
164 | } |
165 | |
166 | static inline int digital_skb_check_crc_none(struct sk_buff *skb) |
167 | { |
168 | return 0; |
169 | } |
170 | |
171 | #endif /* __DIGITAL_H */ |
172 | |