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_ */

 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#include <linux/tty.h>
 8#include <linux/tty_flip.h>
 9
10#define ICE_E810T_GNSS_I2C_BUS		0x2
 
11#define ICE_GNSS_TIMER_DELAY_TIME	(HZ / 10) /* 0.1 second per message */
12/* Create 2 minor devices, both using the same GNSS module. First one is RW,
13 * second one RO.
14 */
15#define ICE_GNSS_TTY_MINOR_DEVICES	2
16#define ICE_GNSS_TTY_WRITE_BUF		250
17#define ICE_MAX_I2C_DATA_SIZE		FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M)
18#define ICE_MAX_I2C_WRITE_BYTES		4
19
20/* u-blox ZED-F9T specific definitions */
21#define ICE_GNSS_UBX_I2C_BUS_ADDR	0x42
22/* Data length register is big endian */
23#define ICE_GNSS_UBX_DATA_LEN_H		0xFD
24#define ICE_GNSS_UBX_DATA_LEN_WIDTH	2
25#define ICE_GNSS_UBX_EMPTY_DATA		0xFF
26/* For u-blox writes are performed without address so the first byte to write is
27 * passed as I2C addr parameter.
28 */
29#define ICE_GNSS_UBX_WRITE_BYTES	(ICE_MAX_I2C_WRITE_BYTES + 1)
30#define ICE_MAX_UBX_READ_TRIES		255
31#define ICE_MAX_UBX_ACK_READ_TRIES	4095
32
33struct gnss_write_buf {
34	struct list_head queue;
35	unsigned int size;
36	unsigned char *buf;
37};
38
39
40/**
41 * struct gnss_serial - data used to initialize GNSS TTY port
42 * @back: back pointer to PF
43 * @tty: pointer to the tty for this device
44 * @open_count: number of times this port has been opened
45 * @gnss_mutex: gnss_mutex used to protect GNSS serial operations
46 * @kworker: kwork thread for handling periodic work
47 * @read_work: read_work function for handling GNSS reads
48 * @write_work: write_work function for handling GNSS writes
49 * @queue: write buffers queue
50 */
51struct gnss_serial {
52	struct ice_pf *back;
53	struct tty_struct *tty;
54	int open_count;
55	struct mutex gnss_mutex; /* protects GNSS serial structure */
56	struct kthread_worker *kworker;
57	struct kthread_delayed_work read_work;
58	struct kthread_work write_work;
59	struct list_head queue;
60};
61
62#if IS_ENABLED(CONFIG_TTY)
63void ice_gnss_init(struct ice_pf *pf);
64void ice_gnss_exit(struct ice_pf *pf);
65bool ice_gnss_is_gps_present(struct ice_hw *hw);
66#else
67static inline void ice_gnss_init(struct ice_pf *pf) { }
68static inline void ice_gnss_exit(struct ice_pf *pf) { }
69static inline bool ice_gnss_is_gps_present(struct ice_hw *hw)
70{
71	return false;
72}
73#endif /* IS_ENABLED(CONFIG_TTY) */
74#endif /* _ICE_GNSS_H_ */