drivers/net/ethernet/microchip/lan743x_ptp.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /* Copyright (C) 2018 Microchip Technology Inc. */
   3
   4 #ifndef _LAN743X_PTP_H
   5 #define _LAN743X_PTP_H
   6
   7 #include "linux/ptp_clock_kernel.h"
   8 #include "linux/netdevice.h"
   9
  10 struct lan743x_adapter;
  11
  12 /* GPIO */
  13 struct lan743x_gpio {
  14         /* gpio_lock: used to prevent concurrent access to gpio settings */
  15         spinlock_t gpio_lock;
  16
  17         int used_bits;
  18         int output_bits;
  19         int ptp_bits;
  20         u32 gpio_cfg0;
  21         u32 gpio_cfg1;
  22         u32 gpio_cfg2;
  23         u32 gpio_cfg3;
  24 };
  25
  26 int lan743x_gpio_init(struct lan743x_adapter *adapter);
  27
  28 void lan743x_ptp_isr(void *context);
  29 bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter);
  30 void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter);
  31 void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
  32                                   struct sk_buff *skb, bool ignore_sync);
  33 int lan743x_ptp_init(struct lan743x_adapter *adapter);
  34 int lan743x_ptp_open(struct lan743x_adapter *adapter);
  35 void lan743x_ptp_close(struct lan743x_adapter *adapter);
  36 void lan743x_ptp_update_latency(struct lan743x_adapter *adapter,
  37                                 u32 link_speed);
  38
  39 int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
  40
  41 #define LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS (4)
  42
  43 #define PTP_FLAG_PTP_CLOCK_REGISTERED   BIT(1)
  44 #define PTP_FLAG_ISR_ENABLED                    BIT(2)
  45
  46 struct lan743x_ptp {
  47         int flags;
  48
  49         /* command_lock: used to prevent concurrent ptp commands */
  50         struct mutex    command_lock;
  51
  52         struct ptp_clock *ptp_clock;
  53         struct ptp_clock_info ptp_clock_info;
  54         struct ptp_pin_desc pin_config[1];
  55
  56 #define LAN743X_PTP_NUMBER_OF_EVENT_CHANNELS (2)
  57         unsigned long used_event_ch;
  58
  59         int perout_event_ch;
  60         int perout_gpio_bit;
  61
  62         /* tx_ts_lock: used to prevent concurrent access to timestamp arrays */
  63         spinlock_t      tx_ts_lock;
  64         int pending_tx_timestamps;
  65         struct sk_buff *tx_ts_skb_queue[LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
  66         unsigned int    tx_ts_ignore_sync_queue;
  67         int tx_ts_skb_queue_size;
  68         u32 tx_ts_seconds_queue[LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
  69         u32 tx_ts_nseconds_queue[LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
  70         u32 tx_ts_header_queue[LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS];
  71         int tx_ts_queue_size;
  72 };
  73
  74 #endif /* _LAN743X_PTP_H */