| /* 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_ */ |
