1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2021-2022, Intel Corporation. */ 3 4 #ifndef _ICE_GNSS_H_ 5 #define _ICE_GNSS_H_ 6 7 #define ICE_E810T_GNSS_I2C_BUS 0x2 8 #define ICE_GNSS_POLL_DATA_DELAY_TIME (HZ / 50) /* poll every 20 ms */ 9 #define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */ 10 #define ICE_GNSS_TTY_WRITE_BUF 250 11 #define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M) 12 #define ICE_MAX_I2C_WRITE_BYTES 4 13 14 /* u-blox ZED-F9T specific definitions */ 15 #define ICE_GNSS_UBX_I2C_BUS_ADDR 0x42 16 /* Data length register is big endian */ 17 #define ICE_GNSS_UBX_DATA_LEN_H 0xFD 18 #define ICE_GNSS_UBX_DATA_LEN_WIDTH 2 19 #define ICE_GNSS_UBX_EMPTY_DATA 0xFF 20 /* For u-blox writes are performed without address so the first byte to write is 21 * passed as I2C addr parameter. 22 */ 23 #define ICE_GNSS_UBX_WRITE_BYTES (ICE_MAX_I2C_WRITE_BYTES + 1) 24 25 /** 26 * struct gnss_serial - data used to initialize GNSS TTY port 27 * @back: back pointer to PF 28 * @kworker: kwork thread for handling periodic work 29 * @read_work: read_work function for handling GNSS reads 30 */ 31 struct gnss_serial { 32 struct ice_pf *back; 33 struct kthread_worker *kworker; 34 struct kthread_delayed_work read_work; 35 }; 36 37 #if IS_ENABLED(CONFIG_GNSS) 38 void ice_gnss_init(struct ice_pf *pf); 39 void ice_gnss_exit(struct ice_pf *pf); 40 bool ice_gnss_is_gps_present(struct ice_hw *hw); 41 #else 42 static inline void ice_gnss_init(struct ice_pf *pf) { } 43 static inline void ice_gnss_exit(struct ice_pf *pf) { } 44 static inline bool ice_gnss_is_gps_present(struct ice_hw *hw) 45 { 46 return false; 47 } 48 #endif /* IS_ENABLED(CONFIG_GNSS) */ 49 #endif /* _ICE_GNSS_H_ */ 50