diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_gnss.h')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_gnss.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_gnss.h b/drivers/net/ethernet/intel/ice/ice_gnss.h new file mode 100644 index 000000000000..f454dd1d9285 --- /dev/null +++ b/drivers/net/ethernet/intel/ice/ice_gnss.h @@ -0,0 +1,74 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2021-2022, Intel Corporation. */ + +#ifndef _ICE_GNSS_H_ +#define _ICE_GNSS_H_ + +#include <linux/tty.h> +#include <linux/tty_flip.h> + +#define ICE_E810T_GNSS_I2C_BUS 0x2 +#define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */ +/* Create 2 minor devices, both using the same GNSS module. First one is RW, + * second one RO. + */ +#define ICE_GNSS_TTY_MINOR_DEVICES 2 +#define ICE_GNSS_TTY_WRITE_BUF 250 +#define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M) +#define ICE_MAX_I2C_WRITE_BYTES 4 + +/* u-blox ZED-F9T specific definitions */ +#define ICE_GNSS_UBX_I2C_BUS_ADDR 0x42 +/* Data length register is big endian */ +#define ICE_GNSS_UBX_DATA_LEN_H 0xFD +#define ICE_GNSS_UBX_DATA_LEN_WIDTH 2 +#define ICE_GNSS_UBX_EMPTY_DATA 0xFF +/* For u-blox writes are performed without address so the first byte to write is + * passed as I2C addr parameter. + */ +#define ICE_GNSS_UBX_WRITE_BYTES (ICE_MAX_I2C_WRITE_BYTES + 1) +#define ICE_MAX_UBX_READ_TRIES 255 +#define ICE_MAX_UBX_ACK_READ_TRIES 4095 + +struct gnss_write_buf { + struct list_head queue; + unsigned int size; + unsigned char *buf; +}; + + +/** + * struct gnss_serial - data used to initialize GNSS TTY port + * @back: back pointer to PF + * @tty: pointer to the tty for this device + * @open_count: number of times this port has been opened + * @gnss_mutex: gnss_mutex used to protect GNSS serial operations + * @kworker: kwork thread for handling periodic work + * @read_work: read_work function for handling GNSS reads + * @write_work: write_work function for handling GNSS writes + * @queue: write buffers queue + */ +struct gnss_serial { + struct ice_pf *back; + struct tty_struct *tty; + int open_count; + struct mutex gnss_mutex; /* protects GNSS serial structure */ + struct kthread_worker *kworker; + struct kthread_delayed_work read_work; + struct kthread_work write_work; + struct list_head queue; +}; + +#if IS_ENABLED(CONFIG_TTY) +void ice_gnss_init(struct ice_pf *pf); +void ice_gnss_exit(struct ice_pf *pf); +bool ice_gnss_is_gps_present(struct ice_hw *hw); +#else +static inline void ice_gnss_init(struct ice_pf *pf) { } +static inline void ice_gnss_exit(struct ice_pf *pf) { } +static inline bool ice_gnss_is_gps_present(struct ice_hw *hw) +{ + return false; +} +#endif /* IS_ENABLED(CONFIG_TTY) */ +#endif /* _ICE_GNSS_H_ */ |