cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hellcreek_ptp.h (2285B)

      1/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
      2/*
      3 * DSA driver for:
      4 * Hirschmann Hellcreek TSN switch.
      5 *
      6 * Copyright (C) 2019,2020 Hochschule Offenburg
      7 * Copyright (C) 2019,2020 Linutronix GmbH
      8 * Authors: Kurt Kanzenbach <kurt@linutronix.de>
      9 *	    Kamil Alkhouri <kamil.alkhouri@hs-offenburg.de>
     10 */
     11
     12#ifndef _HELLCREEK_PTP_H_
     13#define _HELLCREEK_PTP_H_
     14
     15#include <linux/bitops.h>
     16#include <linux/ptp_clock_kernel.h>
     17
     18#include "hellcreek.h"
     19
     20/* Every jump in time is 7 ns */
     21#define MAX_NS_PER_STEP			7L
     22
     23/* Correct offset at every clock cycle */
     24#define MIN_CLK_CYCLES_BETWEEN_STEPS	0
     25
     26/* Maximum available slow offset resources */
     27#define MAX_SLOW_OFFSET_ADJ					\
     28	((unsigned long long)((1 << 30) - 1) * MAX_NS_PER_STEP)
     29
     30/* four times a second overflow check */
     31#define HELLCREEK_OVERFLOW_PERIOD	(HZ / 4)
     32
     33/* PTP Register */
     34#define PR_SETTINGS_C			(0x09 * 2)
     35#define PR_SETTINGS_C_RES3TS		BIT(4)
     36#define PR_SETTINGS_C_TS_SRC_TK_SHIFT	8
     37#define PR_SETTINGS_C_TS_SRC_TK_MASK	GENMASK(9, 8)
     38#define PR_COMMAND_C			(0x0a * 2)
     39#define PR_COMMAND_C_SS			BIT(0)
     40
     41#define PR_CLOCK_STATUS_C		(0x0c * 2)
     42#define PR_CLOCK_STATUS_C_ENA_DRIFT	BIT(12)
     43#define PR_CLOCK_STATUS_C_OFS_ACT	BIT(13)
     44#define PR_CLOCK_STATUS_C_ENA_OFS	BIT(14)
     45
     46#define PR_CLOCK_READ_C			(0x0d * 2)
     47#define PR_CLOCK_WRITE_C		(0x0e * 2)
     48#define PR_CLOCK_OFFSET_C		(0x0f * 2)
     49#define PR_CLOCK_DRIFT_C		(0x10 * 2)
     50
     51#define PR_SS_FREE_DATA_C		(0x12 * 2)
     52#define PR_SS_SYNT_DATA_C		(0x14 * 2)
     53#define PR_SS_SYNC_DATA_C		(0x16 * 2)
     54#define PR_SS_DRAC_DATA_C		(0x18 * 2)
     55
     56#define STATUS_OUT			(0x60 * 2)
     57#define STATUS_OUT_SYNC_GOOD		BIT(0)
     58#define STATUS_OUT_IS_GM		BIT(1)
     59
     60int hellcreek_ptp_setup(struct hellcreek *hellcreek);
     61void hellcreek_ptp_free(struct hellcreek *hellcreek);
     62u16 hellcreek_ptp_read(struct hellcreek *hellcreek, unsigned int offset);
     63void hellcreek_ptp_write(struct hellcreek *hellcreek, u16 data,
     64			 unsigned int offset);
     65u64 hellcreek_ptp_gettime_seconds(struct hellcreek *hellcreek, u64 ns);
     66
     67#define ptp_to_hellcreek(ptp)					\
     68	container_of(ptp, struct hellcreek, ptp_clock_info)
     69
     70#define dw_overflow_to_hellcreek(dw)				\
     71	container_of(dw, struct hellcreek, overflow_work)
     72
     73#define led_to_hellcreek(ldev, led)				\
     74	container_of(ldev, struct hellcreek, led)
     75
     76#endif /* _HELLCREEK_PTP_H_ */