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_TIMER_DELAY_TIME       (HZ / 10) /* 0.1 second per message */
   9 #define ICE_GNSS_TTY_WRITE_BUF          250
  10 #define ICE_MAX_I2C_DATA_SIZE           FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M)
  11 #define ICE_MAX_I2C_WRITE_BYTES         4
  12
  13 /* u-blox ZED-F9T specific definitions */
  14 #define ICE_GNSS_UBX_I2C_BUS_ADDR       0x42
  15 /* Data length register is big endian */
  16 #define ICE_GNSS_UBX_DATA_LEN_H         0xFD
  17 #define ICE_GNSS_UBX_DATA_LEN_WIDTH     2
  18 #define ICE_GNSS_UBX_EMPTY_DATA         0xFF
  19 /* For u-blox writes are performed without address so the first byte to write is
  20  * passed as I2C addr parameter.
  21  */
  22 #define ICE_GNSS_UBX_WRITE_BYTES        (ICE_MAX_I2C_WRITE_BYTES + 1)
  23 #define ICE_MAX_UBX_READ_TRIES          255
  24 #define ICE_MAX_UBX_ACK_READ_TRIES      4095
  25
  26 struct gnss_write_buf {
  27         struct list_head queue;
  28         unsigned int size;
  29         unsigned char *buf;
  30 };
  31
  32 /**
  33  * struct gnss_serial - data used to initialize GNSS TTY port
  34  * @back: back pointer to PF
  35  * @kworker: kwork thread for handling periodic work
  36  * @read_work: read_work function for handling GNSS reads
  37  * @write_work: write_work function for handling GNSS writes
  38  * @queue: write buffers queue
  39  */
  40 struct gnss_serial {
  41         struct ice_pf *back;
  42         struct kthread_worker *kworker;
  43         struct kthread_delayed_work read_work;
  44         struct kthread_work write_work;
  45         struct list_head queue;
  46 };
  47
  48 #if IS_ENABLED(CONFIG_GNSS)
  49 void ice_gnss_init(struct ice_pf *pf);
  50 void ice_gnss_exit(struct ice_pf *pf);
  51 bool ice_gnss_is_gps_present(struct ice_hw *hw);
  52 #else
  53 static inline void ice_gnss_init(struct ice_pf *pf) { }
  54 static inline void ice_gnss_exit(struct ice_pf *pf) { }
  55 static inline bool ice_gnss_is_gps_present(struct ice_hw *hw)
  56 {
  57         return false;
  58 }
  59 #endif /* IS_ENABLED(CONFIG_GNSS) */
  60 #endif /* _ICE_GNSS_H_ */