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 PTPTIVC_INIT 0x19000000 /* 320MHz */ 13 #define RCAR_GEN4_PTP_CLOCK_S4 PTPTIVC_INIT 14 #define RCAR_GEN4_GPTP_OFFSET_S4 0x00018000 15 16 /* for rcar_gen4_ptp_init */ 17 enum rcar_gen4_ptp_reg_layout { 18 RCAR_GEN4_PTP_REG_LAYOUT_S4 19 }; 20 21 /* driver's definitions */ 22 #define RCAR_GEN4_RXTSTAMP_ENABLED BIT(0) 23 #define RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT BIT(1) 24 #define RCAR_GEN4_RXTSTAMP_TYPE_ALL (RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT | BIT(2)) 25 #define RCAR_GEN4_RXTSTAMP_TYPE RCAR_GEN4_RXTSTAMP_TYPE_ALL 26 27 #define RCAR_GEN4_TXTSTAMP_ENABLED BIT(0) 28 29 #define PTPRO 0 30 31 enum rcar_gen4_ptp_reg_s4 { 32 PTPTMEC = PTPRO + 0x0010, 33 PTPTMDC = PTPRO + 0x0014, 34 PTPTIVC0 = PTPRO + 0x0020, 35 PTPTOVC00 = PTPRO + 0x0030, 36 PTPTOVC10 = PTPRO + 0x0034, 37 PTPTOVC20 = PTPRO + 0x0038, 38 PTPGPTPTM00 = PTPRO + 0x0050, 39 PTPGPTPTM10 = PTPRO + 0x0054, 40 PTPGPTPTM20 = PTPRO + 0x0058, 41 }; 42 43 struct rcar_gen4_ptp_reg_offset { 44 u16 enable; 45 u16 disable; 46 u16 increment; 47 u16 config_t0; 48 u16 config_t1; 49 u16 config_t2; 50 u16 monitor_t0; 51 u16 monitor_t1; 52 u16 monitor_t2; 53 }; 54 55 struct rcar_gen4_ptp_private { 56 void __iomem *addr; 57 struct ptp_clock *clock; 58 struct ptp_clock_info info; 59 const struct rcar_gen4_ptp_reg_offset *offs; 60 spinlock_t lock; /* For multiple registers access */ 61 u32 tstamp_tx_ctrl; 62 u32 tstamp_rx_ctrl; 63 s64 default_addend; 64 bool initialized; 65 }; 66 67 int rcar_gen4_ptp_register(struct rcar_gen4_ptp_private *ptp_priv, 68 enum rcar_gen4_ptp_reg_layout layout, u32 clock); 69 int rcar_gen4_ptp_unregister(struct rcar_gen4_ptp_private *ptp_priv); 70 struct rcar_gen4_ptp_private *rcar_gen4_ptp_alloc(struct platform_device *pdev); 71 72 #endif /* #ifndef __RCAR_GEN4_PTP_H__ */ 73