2 * NFC Digital Protocol stack
3 * Copyright (c) 2013, Intel Corporation.
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.
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
19 #include <net/nfc/nfc.h>
20 #include <net/nfc/digital.h>
22 #include <linux/crc-ccitt.h>
23 #include <linux/crc-itu-t.h>
25 #define PROTOCOL_ERR(req) pr_err("%d: NFC Digital Protocol error: %s\n", \
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
33 #define DIGITAL_MAX_HEADER_LEN 7
34 #define DIGITAL_CRC_LEN 2
36 #define DIGITAL_SENSF_NFCID2_NFC_DEP_B1 0x01
37 #define DIGITAL_SENSF_NFCID2_NFC_DEP_B2 0xFE
39 #define DIGITAL_SENS_RES_NFC_DEP 0x0100
40 #define DIGITAL_SEL_RES_NFC_DEP 0x40
41 #define DIGITAL_SENSF_FELICA_SC 0xFFFF
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)
48 struct digital_data_exch
{
49 data_exchange_cb_t cb
;
53 struct sk_buff
*digital_skb_alloc(struct nfc_digital_dev
*ddev
,
56 int digital_send_cmd(struct nfc_digital_dev
*ddev
, u8 cmd_type
,
57 struct sk_buff
*skb
, struct digital_tg_mdaa_params
*params
,
58 u16 timeout
, nfc_digital_cmd_complete_t cmd_cb
,
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
,
67 return digital_send_cmd(ddev
, DIGITAL_CMD_IN_SEND
, skb
, NULL
, timeout
,
71 void digital_poll_next_tech(struct nfc_digital_dev
*ddev
);
73 int digital_in_send_sens_req(struct nfc_digital_dev
*ddev
, u8 rf_tech
);
74 int digital_in_send_sensf_req(struct nfc_digital_dev
*ddev
, u8 rf_tech
);
75 int digital_in_send_iso15693_inv_req(struct nfc_digital_dev
*ddev
, u8 rf_tech
);
77 int digital_in_iso_dep_pull_sod(struct nfc_digital_dev
*ddev
,
79 int digital_in_iso_dep_push_sod(struct nfc_digital_dev
*ddev
,
82 int digital_target_found(struct nfc_digital_dev
*ddev
,
83 struct nfc_target
*target
, u8 protocol
);
85 int digital_in_recv_mifare_res(struct sk_buff
*resp
);
87 int digital_in_send_atr_req(struct nfc_digital_dev
*ddev
,
88 struct nfc_target
*target
, __u8 comm_mode
, __u8
*gb
,
90 int digital_in_send_dep_req(struct nfc_digital_dev
*ddev
,
91 struct nfc_target
*target
, struct sk_buff
*skb
,
92 struct digital_data_exch
*data_exch
);
94 int digital_tg_configure_hw(struct nfc_digital_dev
*ddev
, int type
, int param
);
95 static inline int digital_tg_send_cmd(struct nfc_digital_dev
*ddev
,
96 struct sk_buff
*skb
, u16 timeout
,
97 nfc_digital_cmd_complete_t cmd_cb
, void *cb_context
)
99 return digital_send_cmd(ddev
, DIGITAL_CMD_TG_SEND
, skb
, NULL
, timeout
,
103 void digital_tg_recv_sens_req(struct nfc_digital_dev
*ddev
, void *arg
,
104 struct sk_buff
*resp
);
106 void digital_tg_recv_sensf_req(struct nfc_digital_dev
*ddev
, void *arg
,
107 struct sk_buff
*resp
);
109 static inline int digital_tg_listen(struct nfc_digital_dev
*ddev
, u16 timeout
,
110 nfc_digital_cmd_complete_t cb
, void *arg
)
112 return digital_send_cmd(ddev
, DIGITAL_CMD_TG_LISTEN
, NULL
, NULL
,
116 void digital_tg_recv_atr_req(struct nfc_digital_dev
*ddev
, void *arg
,
117 struct sk_buff
*resp
);
119 int digital_tg_send_dep_res(struct nfc_digital_dev
*ddev
, struct sk_buff
*skb
);
121 int digital_tg_listen_nfca(struct nfc_digital_dev
*ddev
, u8 rf_tech
);
122 int digital_tg_listen_nfcf(struct nfc_digital_dev
*ddev
, u8 rf_tech
);
124 typedef u16 (*crc_func_t
)(u16
, const u8
*, size_t);
126 #define CRC_A_INIT 0x6363
127 #define CRC_B_INIT 0xFFFF
128 #define CRC_F_INIT 0x0000
130 void digital_skb_add_crc(struct sk_buff
*skb
, crc_func_t crc_func
, u16 init
,
131 u8 bitwise_inv
, u8 msb_first
);
133 static inline void digital_skb_add_crc_a(struct sk_buff
*skb
)
135 digital_skb_add_crc(skb
, crc_ccitt
, CRC_A_INIT
, 0, 0);
138 static inline void digital_skb_add_crc_b(struct sk_buff
*skb
)
140 digital_skb_add_crc(skb
, crc_ccitt
, CRC_B_INIT
, 1, 0);
143 static inline void digital_skb_add_crc_f(struct sk_buff
*skb
)
145 digital_skb_add_crc(skb
, crc_itu_t
, CRC_F_INIT
, 0, 1);
148 static inline void digital_skb_add_crc_none(struct sk_buff
*skb
)
153 int digital_skb_check_crc(struct sk_buff
*skb
, crc_func_t crc_func
,
154 u16 crc_init
, u8 bitwise_inv
, u8 msb_first
);
156 static inline int digital_skb_check_crc_a(struct sk_buff
*skb
)
158 return digital_skb_check_crc(skb
, crc_ccitt
, CRC_A_INIT
, 0, 0);
161 static inline int digital_skb_check_crc_b(struct sk_buff
*skb
)
163 return digital_skb_check_crc(skb
, crc_ccitt
, CRC_B_INIT
, 1, 0);
166 static inline int digital_skb_check_crc_f(struct sk_buff
*skb
)
168 return digital_skb_check_crc(skb
, crc_itu_t
, CRC_F_INIT
, 0, 1);
171 static inline int digital_skb_check_crc_none(struct sk_buff
*skb
)
176 #endif /* __DIGITAL_H */