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