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Diffstat (limited to 'drivers/net/dsa/hirschmann/hellcreek_ptp.h')
-rw-r--r--drivers/net/dsa/hirschmann/hellcreek_ptp.h76
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_ */