nvidia-oot: add nvpps and ptp driver

Using this patch we are adding support for
ptp and nvpps driver in oot kernel.

JIRA ESLC-6885

Signed-off-by: Manish Bhardwaj <mbhardwaj@nvidia.com>
Change-Id: Id47ac5602d11ce417f9d421b4f672578922ca94f
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2785318
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Reviewed-by: David Tao <tehyut@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

include/linux/nvpps.h

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ */
+
+#ifndef __NVPPS_H__
+#define __NVPPS_H__
+
+/*
+ * Get PTP time
+ * Clients may call the API every and anytime PTP time is needed.
+ * If PTP time source is not registered, returns -EINVAL
+ *
+ * This API is available irrespective of nvpps dt availablity
+ * When nvpps dt node is not present, interface name will
+ * default to "eth0".
+ */
+int nvpps_get_ptp_ts(void *ts);
+
+#endif /* __NVPPS_H__ */

include/linux/platform/tegra/ptp-notifier.h

@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ */
+
+#ifndef __PTP_NOTIFIER_H
+#define __PTP_NOTIFIER_H
+
+#include <linux/types.h>
+#include <linux/notifier.h>
+#include <linux/etherdevice.h>
+
+#define PTP_HWTIME		1
+#define PTP_TSC_HWTIME		2
+#define TSC_HIGH_SHIFT		32U
+
+/** Max of 5 interfaces created per IP multiply by number of IP */
+#define MAX_MAC_INSTANCES	25
+
+/**
+ * @brief ptp_tsc_data - Struture used to store TSC and PTP time
+ * information.
+ */
+struct ptp_tsc_data {
+	/** PTP TimeStamp in nSec*/
+	u64 ptp_ts;
+	/** TSC TimeStamp in nSec*/
+	u64 tsc_ts;
+};
+
+/* register / unregister HW time source */
+void tegra_register_hwtime_source(int (*func)(struct net_device *, void *, int),
+				  struct net_device *dev);
+void tegra_unregister_hwtime_source(struct net_device *dev);
+
+/* clients registering / unregistering for time update events */
+int tegra_register_hwtime_notifier(struct notifier_block *nb);
+int tegra_unregister_hwtime_notifier(struct notifier_block *nb);
+
+/* Notify time updates to registered clients */
+int tegra_hwtime_notifier_call_chain(unsigned int val, void *v);
+
+/*
+ * Get HW time counter.
+ * Clients may call the API every anytime PTP/TSC time is needed.
+ * If HW time source is not registered, returns -EINVAL
+ */
+int tegra_get_hwtime(const char *intf_name, void *ts, int ts_type);
+
+#endif /* __PTP_NOTIFIER_H */

include/linux/tegra-gte.h

@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ */
+
+#ifndef _LINUX_TEGRA_GTE_ENGINE_H
+#define _LINUX_TEGRA_GTE_ENGINE_H
+
+#include <linux/device.h>
+
+struct tegra_gte_ev_desc {
+	int id;
+	u32 ev_bit;
+	u32 slice;
+};
+
+/* GTE hardware timestamping event details */
+struct tegra_gte_ev_detail {
+	u64 ts_raw; /* raw counter value */
+	u64 ts_ns; /* counter value converted into nano seconds */
+	int dir; /* direction of the event */
+};
+
+#ifdef CONFIG_TEGRA_HTS_GTE
+/*
+ * GTE event registration function
+ *
+ * Parameters:
+ *
+ * Input:
+ * @np:		device node of the interested GTE device
+ * @ev_id:	event id
+ *
+ * Returns:
+ *		Returns ERR_PTR in case of failure or valid
+ *		struct tegra_gte_ev_desc for success.
+ *
+ * Note:	API is not stable and subject to change.
+ */
+struct tegra_gte_ev_desc *tegra_gte_register_event(struct device_node *np,
+						   u32 ev_id);
+
+/*
+ * GTE event un-registration function
+ *
+ * Parameters:
+ *
+ * Input:
+ * @desc:	This parameter should be the same as returned from register
+ *
+ * Returns:
+ *		Returns 0 for success and any other value for the failure
+ *
+  * Note:	API is not stable and subject to change.
+ */
+int tegra_gte_unregister_event(struct tegra_gte_ev_desc *desc);
+
+/*
+ * GTE event retrieval function
+ *
+ * Parameters:
+ *
+ * Input:
+ * @desc:	This parameter should be the same as returned from register
+ *
+ * Output:
+ * @hts:	hts event details
+ *
+ * Returns:
+ *		Returns 0 for success and any other value for the failure
+ *
+ * Note:	API is not stable and subject to change.
+ */
+int tegra_gte_retrieve_event(const struct tegra_gte_ev_desc *desc,
+			     struct tegra_gte_ev_detail *hts);
+
+#else /* ! CONFIG_TEGRA_HTS_GTE */
+static inline struct tegra_gte_ev_desc *tegra_gte_register_event(
+					struct device_node *np, u32 ev_id)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline int tegra_gte_unregister_event(struct tegra_gte_ev_desc *desc)
+{
+	return -ENOSYS;
+}
+
+static inline int tegra_gte_retrieve_event(const struct tegra_gte_ev_desc *desc,
+					   struct tegra_gte_ev_detail *hts)
+{
+	return -ENOSYS;
+}
+
+#endif /* ! CONFIG_TEGRA_HTS_GTE */
+#endif