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