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 */
31struct 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)
38void ice_gnss_init(struct ice_pf *pf);
39void ice_gnss_exit(struct ice_pf *pf);
40bool ice_gnss_is_gps_present(struct ice_hw *hw);
41#else
42static inline void ice_gnss_init(struct ice_pf *pf) { }
43static inline void ice_gnss_exit(struct ice_pf *pf) { }
44static 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

source code of linux/drivers/net/ethernet/intel/ice/ice_gnss.h