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 ptp_clock_info caps;
  34         struct ptp_clock *clock;
  35         struct sja1105_ptp_cmd cmd;
  36         /* Serializes all operations on the PTP hardware clock */
  37         struct mutex lock;
  38 };
  39
  40 int sja1105_ptp_clock_register(struct dsa_switch *ds);
  41
  42 void sja1105_ptp_clock_unregister(struct dsa_switch *ds);
  43
  44 void sja1105et_ptp_cmd_packing(u8 *buf, struct sja1105_ptp_cmd *cmd,
  45                                enum packing_op op);
  46
  47 void sja1105pqrs_ptp_cmd_packing(u8 *buf, struct sja1105_ptp_cmd *cmd,
  48                                  enum packing_op op);
  49
  50 int sja1105_get_ts_info(struct dsa_switch *ds, int port,
  51                         struct ethtool_ts_info *ts);
  52
  53 void sja1105_ptp_txtstamp_skb(struct dsa_switch *ds, int slot,
  54                               struct sk_buff *clone);
  55
  56 bool sja1105_port_rxtstamp(struct dsa_switch *ds, int port,
  57                            struct sk_buff *skb, unsigned int type);
  58
  59 bool sja1105_port_txtstamp(struct dsa_switch *ds, int port,
  60                            struct sk_buff *skb, unsigned int type);
  61
  62 int sja1105_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr);
  63
  64 int sja1105_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr);
  65
  66 int __sja1105_ptp_gettimex(struct dsa_switch *ds, u64 *ns,
  67                            struct ptp_system_timestamp *sts);
  68
  69 int __sja1105_ptp_settime(struct dsa_switch *ds, u64 ns,
  70                           struct ptp_system_timestamp *ptp_sts);
  71
  72 int __sja1105_ptp_adjtime(struct dsa_switch *ds, s64 delta);
  73
  74 int sja1105_ptp_commit(struct dsa_switch *ds, struct sja1105_ptp_cmd *cmd,
  75                        sja1105_spi_rw_mode_t rw);
  76
  77 #else
  78
  79 struct sja1105_ptp_cmd;
  80
  81 /* Structures cannot be empty in C. Bah!
  82  * Keep the mutex as the only element, which is a bit more difficult to
  83  * refactor out of sja1105_main.c anyway.
  84  */
  85 struct sja1105_ptp_data {
  86         struct mutex lock;
  87 };
  88
  89 static inline int sja1105_ptp_clock_register(struct dsa_switch *ds)
  90 {
  91         return 0;
  92 }
  93
  94 static inline void sja1105_ptp_clock_unregister(struct dsa_switch *ds) { }
  95
  96 static inline void sja1105_ptp_txtstamp_skb(struct dsa_switch *ds, int slot,
  97                                             struct sk_buff *clone)
  98 {
  99 }
 100
 101 static inline int __sja1105_ptp_gettimex(struct dsa_switch *ds, u64 *ns,
 102                                          struct ptp_system_timestamp *sts)
 103 {
 104         return 0;
 105 }
 106
 107 static inline int __sja1105_ptp_settime(struct dsa_switch *ds, u64 ns,
 108                                         struct ptp_system_timestamp *ptp_sts)
 109 {
 110         return 0;
 111 }
 112
 113 static inline int __sja1105_ptp_adjtime(struct dsa_switch *ds, s64 delta)
 114 {
 115         return 0;
 116 }
 117
 118 static inline int sja1105_ptp_commit(struct dsa_switch *ds,
 119                                      struct sja1105_ptp_cmd *cmd,
 120                                      sja1105_spi_rw_mode_t rw)
 121 {
 122         return 0;
 123 }
 124
 125 #define sja1105et_ptp_cmd_packing NULL
 126
 127 #define sja1105pqrs_ptp_cmd_packing NULL
 128
 129 #define sja1105_get_ts_info NULL
 130
 131 #define sja1105_port_rxtstamp NULL
 132
 133 #define sja1105_port_txtstamp NULL
 134
 135 #define sja1105_hwtstamp_get NULL
 136
 137 #define sja1105_hwtstamp_set NULL
 138
 139 #endif /* IS_ENABLED(CONFIG_NET_DSA_SJA1105_PTP) */
 140
 141 #endif /* _SJA1105_PTP_H */