/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */ /* * DSA driver for: * Hirschmann Hellcreek TSN switch. * * Copyright (C) 2019,2020 Hochschule Offenburg * Copyright (C) 2019,2020 Linutronix GmbH * Authors: Kurt Kanzenbach <kurt@linutronix.de> * Kamil Alkhouri <kamil.alkhouri@hs-offenburg.de> */ #ifndef _HELLCREEK_PTP_H_ #define _HELLCREEK_PTP_H_ #include <linux/bitops.h> #include <linux/ptp_clock_kernel.h> #include "hellcreek.h" /* Every jump in time is 7 ns */ #define MAX_NS_PER_STEP 7L /* Correct offset at every clock cycle */ #define MIN_CLK_CYCLES_BETWEEN_STEPS 0 /* Maximum available slow offset resources */ #define MAX_SLOW_OFFSET_ADJ \ ((unsigned long long)((1 << 30) - 1) * MAX_NS_PER_STEP) /* four times a second overflow check */ #define HELLCREEK_OVERFLOW_PERIOD (HZ / 4) /* PTP Register */ #define PR_SETTINGS_C (0x09 * 2) #define PR_SETTINGS_C_RES3TS BIT(4) #define PR_SETTINGS_C_TS_SRC_TK_SHIFT 8 #define PR_SETTINGS_C_TS_SRC_TK_MASK GENMASK(9, 8) #define PR_COMMAND_C (0x0a * 2) #define PR_COMMAND_C_SS BIT(0) #define PR_CLOCK_STATUS_C (0x0c * 2) #define PR_CLOCK_STATUS_C_ENA_DRIFT BIT(12) #define PR_CLOCK_STATUS_C_OFS_ACT BIT(13) #define PR_CLOCK_STATUS_C_ENA_OFS BIT(14) #define PR_CLOCK_READ_C (0x0d * 2) #define PR_CLOCK_WRITE_C (0x0e * 2) #define PR_CLOCK_OFFSET_C (0x0f * 2) #define PR_CLOCK_DRIFT_C (0x10 * 2) #define PR_SS_FREE_DATA_C (0x12 * 2) #define PR_SS_SYNT_DATA_C (0x14 * 2) #define PR_SS_SYNC_DATA_C (0x16 * 2) #define PR_SS_DRAC_DATA_C (0x18 * 2) #define STATUS_OUT (0x60 * 2) #define STATUS_OUT_SYNC_GOOD BIT(0) #define STATUS_OUT_IS_GM BIT(1) int hellcreek_ptp_setup(struct hellcreek *hellcreek); void hellcreek_ptp_free(struct hellcreek *hellcreek); u16 hellcreek_ptp_read(struct hellcreek *hellcreek, unsigned int offset); void hellcreek_ptp_write(struct hellcreek *hellcreek, u16 data, unsigned int offset); u64 hellcreek_ptp_gettime_seconds(struct hellcreek *hellcreek, u64 ns); #define ptp_to_hellcreek(ptp) \ container_of(ptp, struct hellcreek, ptp_clock_info) #define dw_overflow_to_hellcreek(dw) \ container_of(dw, struct hellcreek, overflow_work) #define led_to_hellcreek(ldev, led) \ container_of(ldev, struct hellcreek, led) #endif /* _HELLCREEK_PTP_H_ */