1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2018-2021, Intel Corporation. */ 3 4 #ifndef _ICE_GNSS_H_ 5 #define _ICE_GNSS_H_ 6 7 #include <linux/tty.h> 8 #include <linux/tty_flip.h> 9 10 #define ICE_E810T_GNSS_I2C_BUS 0x2 11 #define ICE_GNSS_UBX_I2C_BUS_ADDR 0x42 12 /* Data length register is big endian */ 13 #define ICE_GNSS_UBX_DATA_LEN_H 0xFD 14 #define ICE_GNSS_UBX_DATA_LEN_WIDTH 2 15 #define ICE_GNSS_UBX_EMPTY_DATA 0xFF 16 #define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */ 17 #define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M) 18 #define ICE_MAX_UBX_READ_TRIES 255 19 20 /** 21 * struct gnss_serial - data used to initialize GNSS TTY port 22 * @back: back pointer to PF 23 * @tty: pointer to the tty for this device 24 * @open_count: number of times this port has been opened 25 * @gnss_mutex: gnss_mutex used to protect GNSS serial operations 26 * @kworker: kwork thread for handling periodic work 27 * @read_work: read_work function for handling GNSS reads 28 */ 29 struct gnss_serial { 30 struct ice_pf *back; 31 struct tty_struct *tty; 32 int open_count; 33 struct mutex gnss_mutex; /* protects GNSS serial structure */ 34 struct kthread_worker *kworker; 35 struct kthread_delayed_work read_work; 36 }; 37 38 #if IS_ENABLED(CONFIG_TTY) 39 void ice_gnss_init(struct ice_pf *pf); 40 void ice_gnss_exit(struct ice_pf *pf); 41 bool ice_gnss_is_gps_present(struct ice_hw *hw); 42 #else 43 static inline void ice_gnss_init(struct ice_pf *pf) { } 44 static inline void ice_gnss_exit(struct ice_pf *pf) { } 45 static inline bool ice_gnss_is_gps_present(struct ice_hw *hw) 46 { 47 return false; 48 } 49 #endif /* IS_ENABLED(CONFIG_TTY) */ 50 #endif /* _ICE_GNSS_H_ */ 51