digital.h (5294B)
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 DIGITAL_MAX_HEADER_LEN 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 40struct digital_data_exch { 41 data_exchange_cb_t cb; 42 void *cb_context; 43}; 44 45struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, 46 unsigned int len); 47 48int 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 53int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param); 54static 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 63void digital_poll_next_tech(struct nfc_digital_dev *ddev); 64 65int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech); 66int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech); 67int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech); 68int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech); 69 70int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev, 71 struct sk_buff *skb); 72int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev, 73 struct sk_buff *skb); 74 75int digital_target_found(struct nfc_digital_dev *ddev, 76 struct nfc_target *target, u8 protocol); 77 78int digital_in_recv_mifare_res(struct sk_buff *resp); 79 80int 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); 83int 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 87int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param); 88static 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 96void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, 97 struct sk_buff *resp); 98 99void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, 100 struct sk_buff *resp); 101 102static 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 109void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg, 110 struct sk_buff *resp); 111 112int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb); 113 114int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech); 115int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech); 116void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg, 117 struct sk_buff *resp); 118 119typedef 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 125void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init, 126 u8 bitwise_inv, u8 msb_first); 127 128static 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 133static 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 138static 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 143static inline void digital_skb_add_crc_none(struct sk_buff *skb) 144{ 145 return; 146} 147 148int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func, 149 u16 crc_init, u8 bitwise_inv, u8 msb_first); 150 151static 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 156static 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 161static 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 166static inline int digital_skb_check_crc_none(struct sk_buff *skb) 167{ 168 return 0; 169} 170 171#endif /* __DIGITAL_H */