drivers/net/ethernet/renesas/rcar_gen4_ptp.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Renesas R-Car Gen4 gPTP device driver
   3  *
   4  * Copyright (C) 2022 Renesas Electronics Corporation
   5  */
   6
   7 #ifndef __RCAR_GEN4_PTP_H__
   8 #define __RCAR_GEN4_PTP_H__
   9
  10 #include <linux/ptp_clock_kernel.h>
  11
  12 #define RCAR_GEN4_GPTP_OFFSET_S4        0x00018000
  13
  14 enum rcar_gen4_ptp_reg_layout {
  15         RCAR_GEN4_PTP_REG_LAYOUT
  16 };
  17
  18 /* driver's definitions */
  19 #define RCAR_GEN4_RXTSTAMP_ENABLED              BIT(0)
  20 #define RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT     BIT(1)
  21 #define RCAR_GEN4_RXTSTAMP_TYPE_ALL             (RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT | BIT(2))
  22 #define RCAR_GEN4_RXTSTAMP_TYPE                 RCAR_GEN4_RXTSTAMP_TYPE_ALL
  23
  24 #define RCAR_GEN4_TXTSTAMP_ENABLED              BIT(0)
  25
  26 #define PTPRO                           0
  27
  28 enum rcar_gen4_ptp_reg {
  29         PTPTMEC         = PTPRO + 0x0010,
  30         PTPTMDC         = PTPRO + 0x0014,
  31         PTPTIVC0        = PTPRO + 0x0020,
  32         PTPTOVC00       = PTPRO + 0x0030,
  33         PTPTOVC10       = PTPRO + 0x0034,
  34         PTPTOVC20       = PTPRO + 0x0038,
  35         PTPGPTPTM00     = PTPRO + 0x0050,
  36         PTPGPTPTM10     = PTPRO + 0x0054,
  37         PTPGPTPTM20     = PTPRO + 0x0058,
  38 };
  39
  40 struct rcar_gen4_ptp_reg_offset {
  41         u16 enable;
  42         u16 disable;
  43         u16 increment;
  44         u16 config_t0;
  45         u16 config_t1;
  46         u16 config_t2;
  47         u16 monitor_t0;
  48         u16 monitor_t1;
  49         u16 monitor_t2;
  50 };
  51
  52 struct rcar_gen4_ptp_private {
  53         void __iomem *addr;
  54         struct ptp_clock *clock;
  55         struct ptp_clock_info info;
  56         const struct rcar_gen4_ptp_reg_offset *offs;
  57         spinlock_t lock;        /* For multiple registers access */
  58         u32 tstamp_tx_ctrl;
  59         u32 tstamp_rx_ctrl;
  60         s64 default_addend;
  61         bool initialized;
  62 };
  63
  64 int rcar_gen4_ptp_register(struct rcar_gen4_ptp_private *ptp_priv,
  65                            enum rcar_gen4_ptp_reg_layout layout, u32 rate);
  66 int rcar_gen4_ptp_unregister(struct rcar_gen4_ptp_private *ptp_priv);
  67 struct rcar_gen4_ptp_private *rcar_gen4_ptp_alloc(struct platform_device *pdev);
  68
  69 #endif  /* #ifndef __RCAR_GEN4_PTP_H__ */