| 1 | /* SPDX-License-Identifier: (GPL-2.0 OR MIT) */ |
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| 2 | /* |
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| 3 | * DSA driver for: |
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| 4 | * Hirschmann Hellcreek TSN switch. |
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| 5 | * |
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| 6 | * Copyright (C) 2019,2020 Hochschule Offenburg |
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| 7 | * Copyright (C) 2019,2020 Linutronix GmbH |
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| 8 | * Authors: Kurt Kanzenbach <kurt@linutronix.de> |
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| 9 | * Kamil Alkhouri <kamil.alkhouri@hs-offenburg.de> |
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| 10 | */ |
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| 11 | |
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| 12 | #ifndef _HELLCREEK_PTP_H_ |
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| 13 | #define _HELLCREEK_PTP_H_ |
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| 14 | |
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| 15 | #include <linux/bitops.h> |
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| 16 | #include <linux/ptp_clock_kernel.h> |
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| 17 | |
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| 18 | #include "hellcreek.h" |
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| 19 | |
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| 20 | /* Every jump in time is 7 ns */ |
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| 21 | #define MAX_NS_PER_STEP 7L |
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| 22 | |
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| 23 | /* Correct offset at every clock cycle */ |
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| 24 | #define MIN_CLK_CYCLES_BETWEEN_STEPS 0 |
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| 25 | |
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| 26 | /* Maximum available slow offset resources */ |
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| 27 | #define MAX_SLOW_OFFSET_ADJ \ |
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| 28 | ((unsigned long long)((1 << 30) - 1) * MAX_NS_PER_STEP) |
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| 29 | |
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| 30 | /* four times a second overflow check */ |
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| 31 | #define HELLCREEK_OVERFLOW_PERIOD (HZ / 4) |
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| 32 | |
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| 33 | /* PTP Register */ |
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| 34 | #define PR_SETTINGS_C (0x09 * 2) |
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| 35 | #define PR_SETTINGS_C_RES3TS BIT(4) |
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| 36 | #define PR_SETTINGS_C_TS_SRC_TK_SHIFT 8 |
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| 37 | #define PR_SETTINGS_C_TS_SRC_TK_MASK GENMASK(9, 8) |
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| 38 | #define PR_COMMAND_C (0x0a * 2) |
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| 39 | #define PR_COMMAND_C_SS BIT(0) |
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| 40 | |
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| 41 | #define PR_CLOCK_STATUS_C (0x0c * 2) |
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| 42 | #define PR_CLOCK_STATUS_C_ENA_DRIFT BIT(12) |
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| 43 | #define PR_CLOCK_STATUS_C_OFS_ACT BIT(13) |
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| 44 | #define PR_CLOCK_STATUS_C_ENA_OFS BIT(14) |
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| 45 | |
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| 46 | #define PR_CLOCK_READ_C (0x0d * 2) |
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| 47 | #define PR_CLOCK_WRITE_C (0x0e * 2) |
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| 48 | #define PR_CLOCK_OFFSET_C (0x0f * 2) |
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| 49 | #define PR_CLOCK_DRIFT_C (0x10 * 2) |
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| 50 | |
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| 51 | #define PR_SS_FREE_DATA_C (0x12 * 2) |
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| 52 | #define PR_SS_SYNT_DATA_C (0x14 * 2) |
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| 53 | #define PR_SS_SYNC_DATA_C (0x16 * 2) |
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| 54 | #define PR_SS_DRAC_DATA_C (0x18 * 2) |
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| 55 | |
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| 56 | #define STATUS_OUT (0x60 * 2) |
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| 57 | #define STATUS_OUT_SYNC_GOOD BIT(0) |
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| 58 | #define STATUS_OUT_IS_GM BIT(1) |
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| 59 | |
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| 60 | int hellcreek_ptp_setup(struct hellcreek *hellcreek); |
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| 61 | void hellcreek_ptp_free(struct hellcreek *hellcreek); |
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| 62 | u16 hellcreek_ptp_read(struct hellcreek *hellcreek, unsigned int offset); |
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| 63 | void hellcreek_ptp_write(struct hellcreek *hellcreek, u16 data, |
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| 64 | unsigned int offset); |
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| 65 | u64 hellcreek_ptp_gettime_seconds(struct hellcreek *hellcreek, u64 ns); |
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| 66 | |
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| 67 | #define ptp_to_hellcreek(ptp) \ |
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| 68 | container_of(ptp, struct hellcreek, ptp_clock_info) |
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| 69 | |
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| 70 | #define dw_overflow_to_hellcreek(dw) \ |
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| 71 | container_of(dw, struct hellcreek, overflow_work) |
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| 72 | |
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| 73 | #define led_to_hellcreek(ldev, led) \ |
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| 74 | container_of(ldev, struct hellcreek, led) |
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| 75 | |
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| 76 | #endif /* _HELLCREEK_PTP_H_ */ |
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| 77 | |
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