diff options
Diffstat (limited to 'net/nfc/digital.h')
| -rw-r--r-- | net/nfc/digital.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/net/nfc/digital.h b/net/nfc/digital.h index 0a2767098daa..fb5324b792de 100644 --- a/net/nfc/digital.h +++ b/net/nfc/digital.h @@ -19,6 +19,8 @@ #include <net/nfc/nfc.h> #include <net/nfc/digital.h> +#include <linux/crc-ccitt.h> + #define PR_DBG(fmt, ...) pr_debug("%s: " fmt "\n", __func__, ##__VA_ARGS__) #define PR_ERR(fmt, ...) pr_err("%s: " fmt "\n", __func__, ##__VA_ARGS__) #define PROTOCOL_ERR(req) pr_err("%s:%d: NFC Digital Protocol error: %s\n", \ @@ -32,6 +34,16 @@ #define DIGITAL_MAX_HEADER_LEN 7 #define DIGITAL_CRC_LEN 2 +#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); @@ -53,4 +65,50 @@ 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_target_found(struct nfc_digital_dev *ddev, + struct nfc_target *target, u8 protocol); + +int digital_in_recv_mifare_res(struct sk_buff *resp); + +typedef u16 (*crc_func_t)(u16, const u8 *, size_t); + +#define CRC_A_INIT 0x6363 +#define CRC_B_INIT 0xFFFF + +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_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_none(struct sk_buff *skb) +{ + return 0; +} + #endif /* __DIGITAL_H */ |