drivers/net/dsa/sja1105/sja1105_ptp.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (c) 2019, Vladimir Oltean <olteanv@gmail.com>
   3  */
   4 #ifndef _SJA1105_PTP_H
   5 #define _SJA1105_PTP_H
   6
   7 #if IS_ENABLED(CONFIG_NET_DSA_SJA1105_PTP)
   8
   9 /* Timestamps are in units of 8 ns clock ticks (equivalent to
  10  * a fixed 125 MHz clock).
  11  */
  12 #define SJA1105_TICK_NS                 8
  13
  14 static inline s64 ns_to_sja1105_ticks(s64 ns)
  15 {
  16         return ns / SJA1105_TICK_NS;
  17 }
  18
  19 static inline s64 sja1105_ticks_to_ns(s64 ticks)
  20 {
  21         return ticks * SJA1105_TICK_NS;
  22 }
  23
  24 struct sja1105_ptp_cmd {
  25         u64 ptpstrtsch;         /* start schedule */
  26         u64 ptpstopsch;         /* stop schedule */
  27         u64 resptp;             /* reset */
  28         u64 corrclk4ts;         /* use the corrected clock for timestamps */
  29         u64 ptpclkadd;          /* enum sja1105_ptp_clk_mode */
  30 };
  31
  32 struct sja1105_ptp_data {
  33         struct sk_buff_head skb_rxtstamp_queue;
  34         struct ptp_clock_info caps;
  35         struct ptp_clock *clock;
  36         struct sja1105_ptp_cmd cmd;
  37         /* Serializes all operations on the PTP hardware clock */
  38         struct mutex lock;
  39 };
  40
  41 int sja1105_ptp_clock_register(struct dsa_switch *ds);
  42
  43 void sja1105_ptp_clock_unregister(struct dsa_switch *ds);
  44
  45 void sja1105et_ptp_cmd_packing(u8 *buf, struct sja1105_ptp_cmd *cmd,
  46                                enum packing_op op);
  47
  48 void sja1105pqrs_ptp_cmd_packing(u8 *buf, struct sja1105_ptp_cmd *cmd,
  49                                  enum packing_op op);
  50
  51 int sja1105_get_ts_info(struct dsa_switch *ds, int port,
  52                         struct ethtool_ts_info *ts);
  53
  54 void sja1105_ptp_txtstamp_skb(struct dsa_switch *ds, int slot,
  55                               struct sk_buff *clone);
  56
  57 bool sja1105_port_rxtstamp(struct dsa_switch *ds, int port,
  58                            struct sk_buff *skb, unsigned int type);
  59
  60 bool sja1105_port_txtstamp(struct dsa_switch *ds, int port,
  61                            struct sk_buff *skb, unsigned int type);
  62
  63 int sja1105_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr);
  64
  65 int sja1105_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr);
  66
  67 int __sja1105_ptp_gettimex(struct dsa_switch *ds, u64 *ns,
  68                            struct ptp_system_timestamp *sts);
  69
  70 int __sja1105_ptp_settime(struct dsa_switch *ds, u64 ns,
  71                           struct ptp_system_timestamp *ptp_sts);
  72
  73 int __sja1105_ptp_adjtime(struct dsa_switch *ds, s64 delta);
  74
  75 int sja1105_ptp_commit(struct dsa_switch *ds, struct sja1105_ptp_cmd *cmd,
  76                        sja1105_spi_rw_mode_t rw);
  77
  78 #else
  79
  80 struct sja1105_ptp_cmd;
  81
  82 /* Structures cannot be empty in C. Bah!
  83  * Keep the mutex as the only element, which is a bit more difficult to
  84  * refactor out of sja1105_main.c anyway.
  85  */
  86 struct sja1105_ptp_data {
  87         struct mutex lock;
  88 };
  89
  90 static inline int sja1105_ptp_clock_register(struct dsa_switch *ds)
  91 {
  92         return 0;
  93 }
  94
  95 static inline void sja1105_ptp_clock_unregister(struct dsa_switch *ds) { }
  96
  97 static inline void sja1105_ptp_txtstamp_skb(struct dsa_switch *ds, int slot,
  98                                             struct sk_buff *clone)
  99 {
 100 }
 101
 102 static inline int __sja1105_ptp_gettimex(struct dsa_switch *ds, u64 *ns,
 103                                          struct ptp_system_timestamp *sts)
 104 {
 105         return 0;
 106 }
 107
 108 static inline int __sja1105_ptp_settime(struct dsa_switch *ds, u64 ns,
 109                                         struct ptp_system_timestamp *ptp_sts)
 110 {
 111         return 0;
 112 }
 113
 114 static inline int __sja1105_ptp_adjtime(struct dsa_switch *ds, s64 delta)
 115 {
 116         return 0;
 117 }
 118
 119 static inline int sja1105_ptp_commit(struct dsa_switch *ds,
 120                                      struct sja1105_ptp_cmd *cmd,
 121                                      sja1105_spi_rw_mode_t rw)
 122 {
 123         return 0;
 124 }
 125
 126 #define sja1105et_ptp_cmd_packing NULL
 127
 128 #define sja1105pqrs_ptp_cmd_packing NULL
 129
 130 #define sja1105_get_ts_info NULL
 131
 132 #define sja1105_port_rxtstamp NULL
 133
 134 #define sja1105_port_txtstamp NULL
 135
 136 #define sja1105_hwtstamp_get NULL
 137
 138 #define sja1105_hwtstamp_set NULL
 139
 140 #endif /* IS_ENABLED(CONFIG_NET_DSA_SJA1105_PTP) */
 141
 142 #endif /* _SJA1105_PTP_H */