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 60 int hellcreek_ptp_setup(struct hellcreek *hellcreek); 61 void hellcreek_ptp_free(struct hellcreek *hellcreek); 62 u16 hellcreek_ptp_read(struct hellcreek *hellcreek, unsigned int offset); 63 void hellcreek_ptp_write(struct hellcreek *hellcreek, u16 data, 64 unsigned int offset); 65 u64 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_ */ 77