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