diff options
Diffstat (limited to 'drivers/net/dsa/hirschmann/hellcreek_ptp.h')
| -rw-r--r-- | drivers/net/dsa/hirschmann/hellcreek_ptp.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/net/dsa/hirschmann/hellcreek_ptp.h b/drivers/net/dsa/hirschmann/hellcreek_ptp.h new file mode 100644 index 000000000..0b51392c7 --- /dev/null +++ b/drivers/net/dsa/hirschmann/hellcreek_ptp.h @@ -0,0 +1,76 @@ +/* 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_ */ |