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43113ff734
Add a new ice_gnss.c file for holding the basic GNSS module functions. If the device supports GNSS module, call the new ice_gnss_init and ice_gnss_release functions where appropriate. Implement basic functionality for reading the data from GNSS module using TTY device. Add I2C read AQ command. It is now required for controlling the external physical connectors via external I2C port expander on E810-T adapters. Future changes will introduce write functionality. Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com> Signed-off-by: Sudhansu Sekhar Mishra <sudhansu.mishra@intel.com> Tested-by: Sunitha Mekala <sunithax.d.mekala@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2018-2021, Intel Corporation. */
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#ifndef _ICE_GNSS_H_
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#define _ICE_GNSS_H_
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#define ICE_E810T_GNSS_I2C_BUS 0x2
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#define ICE_GNSS_UBX_I2C_BUS_ADDR 0x42
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/* Data length register is big endian */
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#define ICE_GNSS_UBX_DATA_LEN_H 0xFD
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#define ICE_GNSS_UBX_DATA_LEN_WIDTH 2
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#define ICE_GNSS_UBX_EMPTY_DATA 0xFF
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#define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */
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#define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M)
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#define ICE_MAX_UBX_READ_TRIES 255
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/**
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* struct gnss_serial - data used to initialize GNSS TTY port
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* @back: back pointer to PF
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* @tty: pointer to the tty for this device
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* @open_count: number of times this port has been opened
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* @gnss_mutex: gnss_mutex used to protect GNSS serial operations
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* @kworker: kwork thread for handling periodic work
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* @read_work: read_work function for handling GNSS reads
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*/
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struct gnss_serial {
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struct ice_pf *back;
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struct tty_struct *tty;
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int open_count;
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struct mutex gnss_mutex; /* protects GNSS serial structure */
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struct kthread_worker *kworker;
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struct kthread_delayed_work read_work;
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};
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#if IS_ENABLED(CONFIG_TTY)
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void ice_gnss_init(struct ice_pf *pf);
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void ice_gnss_exit(struct ice_pf *pf);
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bool ice_gnss_is_gps_present(struct ice_hw *hw);
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#else
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static inline void ice_gnss_init(struct ice_pf *pf) { }
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static inline void ice_gnss_exit(struct ice_pf *pf) { }
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static inline bool ice_gnss_is_gps_present(struct ice_hw *hw)
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{
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return false;
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}
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#endif /* IS_ENABLED(CONFIG_TTY) */
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#endif /* _ICE_GNSS_H_ */
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