/* SPDX-License-Identifier: GPL-2.0-only */ /* * NFC Digital Protocol stack * Copyright (c) 2013, Intel Corporation. */ #ifndef __DIGITAL_H #define __DIGITAL_H #include <net/nfc/nfc.h> #include <net/nfc/digital.h> #include <linux/crc-ccitt.h> #include <linux/crc-itu-t.h> #define PROTOCOL_ERR(req) pr_err("%d: NFC Digital Protocol error: %s\n", \ __LINE__, req) #define DIGITAL_CMD_IN_SEND 0 #define DIGITAL_CMD_TG_SEND 1 #define DIGITAL_CMD_TG_LISTEN 2 #define DIGITAL_CMD_TG_LISTEN_MDAA 3 #define DIGITAL_CMD_TG_LISTEN_MD 4 #define DIGITAL_MAX_HEADER_LEN 7 #define DIGITAL_CRC_LEN 2 #define DIGITAL_SENSF_NFCID2_NFC_DEP_B1 0x01 #define DIGITAL_SENSF_NFCID2_NFC_DEP_B2 0xFE #define DIGITAL_SENS_RES_NFC_DEP 0x0100 #define DIGITAL_SEL_RES_NFC_DEP 0x40 #define DIGITAL_SENSF_FELICA_SC 0xFFFF #define DIGITAL_DRV_CAPS_IN_CRC(ddev) \ ((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_IN_CRC) #define DIGITAL_DRV_CAPS_TG_CRC(ddev) \ ((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_TG_CRC) struct digital_data_exch { data_exchange_cb_t cb; void *cb_context; }; struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, unsigned int len); int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type, struct sk_buff *skb, struct digital_tg_mdaa_params *params, u16 timeout, nfc_digital_cmd_complete_t cmd_cb, void *cb_context); int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param); static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev, struct sk_buff *skb, u16 timeout, nfc_digital_cmd_complete_t cmd_cb, void *cb_context) { return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, NULL, timeout, cmd_cb, cb_context); } void digital_poll_next_tech(struct nfc_digital_dev *ddev); int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech); int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech); int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech); int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech); int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev, struct sk_buff *skb); int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev, struct sk_buff *skb); int digital_target_found(struct nfc_digital_dev *ddev, struct nfc_target *target, u8 protocol); int digital_in_recv_mifare_res(struct sk_buff *resp); int digital_in_send_atr_req(struct nfc_digital_dev *ddev, struct nfc_target *target, __u8 comm_mode, __u8 *gb, size_t gb_len); int digital_in_send_dep_req(struct nfc_digital_dev *ddev, struct nfc_target *target, struct sk_buff *skb, struct digital_data_exch *data_exch); int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param); static inline int digital_tg_send_cmd(struct nfc_digital_dev *ddev, struct sk_buff *skb, u16 timeout, nfc_digital_cmd_complete_t cmd_cb, void *cb_context) { return digital_send_cmd(ddev, DIGITAL_CMD_TG_SEND, skb, NULL, timeout, cmd_cb, cb_context); } void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp); void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp); static inline int digital_tg_listen(struct nfc_digital_dev *ddev, u16 timeout, nfc_digital_cmd_complete_t cb, void *arg) { return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN, NULL, NULL, timeout, cb, arg); } void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp); int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb); int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech); int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech); void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp); typedef u16 (*crc_func_t)(u16, const u8 *, size_t); #define CRC_A_INIT 0x6363 #define CRC_B_INIT 0xFFFF #define CRC_F_INIT 0x0000 void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init, u8 bitwise_inv, u8 msb_first); static inline void digital_skb_add_crc_a(struct sk_buff *skb) { digital_skb_add_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0); } static inline void digital_skb_add_crc_b(struct sk_buff *skb) { digital_skb_add_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0); } static inline void digital_skb_add_crc_f(struct sk_buff *skb) { digital_skb_add_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1); } static inline void digital_skb_add_crc_none(struct sk_buff *skb) { return; } int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func, u16 crc_init, u8 bitwise_inv, u8 msb_first); static inline int digital_skb_check_crc_a(struct sk_buff *skb) { return digital_skb_check_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0); } static inline int digital_skb_check_crc_b(struct sk_buff *skb) { return digital_skb_check_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0); } static inline int digital_skb_check_crc_f(struct sk_buff *skb) { return digital_skb_check_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1); } static inline int digital_skb_check_crc_none(struct sk_buff *skb) { return 0; } #endif /* __DIGITAL_H */