From 8333061e834b732fa2ec6b59a70ac5560f3f2652 Mon Sep 17 00:00:00 2001
From: Surabhi Vishnoi <svishnoi@codeaurora.org>
Date: Wed, 5 Feb 2020 15:53:41 +0530
Subject: [PATCH] qcacld-3.0: Add pld API to get the audio timestamp

Add pld API to get audio timestamp needed in FTM wlan
timesync feature to synchronise the audio clocks of
master and slave devices

Change-Id: I6f08e33904e26728492286f516ce5a8074afd1ea
CRs-Fixed: 2616917
---
 core/pld/inc/pld_common.h | 19 +++++++++++++++++++
 core/pld/src/pld_common.c | 39 +++++++++++++++++++++++++++++++++++++++
 core/pld/src/pld_snoc.h   | 36 +++++++++++++++++++++++++++++++++++-
 3 files changed, 93 insertions(+), 1 deletion(-)

diff --git a/core/pld/inc/pld_common.h b/core/pld/inc/pld_common.h
index 0395a2ec0a41..8a7b96b194ca 100644
--- a/core/pld/inc/pld_common.h
+++ b/core/pld/inc/pld_common.h
@@ -334,6 +334,18 @@ enum pld_recovery_reason {
 	PLD_REASON_LINK_DOWN
 };
 
+#ifdef FEATURE_WLAN_TIME_SYNC_FTM
+/**
+ * enum pld_wlan_time_sync_trigger_type - WLAN time sync trigger type
+ * @PLD_TRIGGER_POSITIVE_EDGE: Positive edge trigger
+ * @PLD_TRIGGER_NEGATIVE_EDGE: Negative edge trigger
+ */
+enum pld_wlan_time_sync_trigger_type {
+	PLD_TRIGGER_POSITIVE_EDGE,
+	PLD_TRIGGER_NEGATIVE_EDGE
+};
+#endif /* FEATURE_WLAN_TIME_SYNC_FTM */
+
 /**
  * struct pld_driver_ops - driver callback functions
  * @probe: required operation, will be called when device is detected
@@ -419,6 +431,13 @@ void pld_is_pci_link_down(struct device *dev);
 int pld_shadow_control(struct device *dev, bool enable);
 void pld_schedule_recovery_work(struct device *dev,
 				enum pld_recovery_reason reason);
+
+#ifdef FEATURE_WLAN_TIME_SYNC_FTM
+int pld_get_audio_wlan_timestamp(struct device *dev,
+				 enum pld_wlan_time_sync_trigger_type type,
+				 uint64_t *ts);
+#endif /* FEATURE_WLAN_TIME_SYNC_FTM */
+
 #ifdef CONFIG_CNSS_UTILS
 /**
  * pld_set_wlan_unsafe_channel() - Set unsafe channel
diff --git a/core/pld/src/pld_common.c b/core/pld/src/pld_common.c
index 6dcf82b4cb9a..432d4f95d59a 100644
--- a/core/pld/src/pld_common.c
+++ b/core/pld/src/pld_common.c
@@ -2641,3 +2641,42 @@ int pld_idle_restart(struct device *dev,
 
 	return errno;
 }
+
+#ifdef FEATURE_WLAN_TIME_SYNC_FTM
+/**
+ * pld_get_audio_wlan_timestamp() - Get audio timestamp
+ * @dev: device pointer
+ * @type: trigger type
+ * @ts: audio timestamp
+ *
+ * This API can be used to get audio timestamp.
+ *
+ * Return: 0 if trigger to get audio timestamp is successful
+ *         Non zero failure code for errors
+ */
+int pld_get_audio_wlan_timestamp(struct device *dev,
+				 enum pld_wlan_time_sync_trigger_type type,
+				 uint64_t *ts)
+{
+	int ret = 0;
+	enum pld_bus_type bus_type;
+
+	bus_type = pld_get_bus_type(dev);
+	switch (bus_type) {
+	case PLD_BUS_TYPE_SNOC:
+		ret = pld_snoc_get_audio_wlan_timestamp(dev, type, ts);
+		break;
+	case PLD_BUS_TYPE_PCIE:
+	case PLD_BUS_TYPE_SNOC_FW_SIM:
+	case PLD_BUS_TYPE_PCIE_FW_SIM:
+	case PLD_BUS_TYPE_SDIO:
+	case PLD_BUS_TYPE_USB:
+	case PLD_BUS_TYPE_IPCI:
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+#endif /* FEATURE_WLAN_TIME_SYNC_FTM */
diff --git a/core/pld/src/pld_snoc.h b/core/pld/src/pld_snoc.h
index f76d791d7ceb..f965c8c0f07f 100644
--- a/core/pld/src/pld_snoc.h
+++ b/core/pld/src/pld_snoc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2019 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2020 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -150,6 +150,17 @@ static inline int pld_snoc_is_fw_rejuvenate(void)
 static inline void pld_snoc_block_shutdown(bool status)
 {
 }
+
+#ifdef FEATURE_WLAN_TIME_SYNC_FTM
+static inline int
+pld_snoc_get_audio_wlan_timestamp(struct device *dev,
+				  enum pld_wlan_time_sync_trigger_type type,
+				  uint64_t *ts)
+{
+	return 0;
+}
+#endif /* FEATURE_WLAN_TIME_SYNC_FTM */
+
 #else
 int pld_snoc_register_driver(void);
 void pld_snoc_unregister_driver(void);
@@ -159,6 +170,29 @@ int pld_snoc_wlan_enable(struct device *dev,
 int pld_snoc_wlan_disable(struct device *dev, enum pld_driver_mode mode);
 int pld_snoc_get_soc_info(struct device *dev, struct pld_soc_info *info);
 
+#ifdef FEATURE_WLAN_TIME_SYNC_FTM
+/**
+ * pld_snoc_get_audio_wlan_timestamp() - Get audio timestamp
+ * @dev: device
+ * @type: trigger type
+ * @ts: timestamp
+ *
+ * Return audio timestamp to the ts.
+ *
+ * Return: 0 for success
+ *         Non zero failure code for errors
+ */
+static inline int
+pld_snoc_get_audio_wlan_timestamp(struct device *dev,
+				  enum pld_wlan_time_sync_trigger_type type,
+				  uint64_t *ts)
+{
+	if (!dev)
+		return -ENODEV;
+
+	return 0;
+}
+#endif /* FEATURE_WLAN_TIME_SYNC_FTM */
 static inline int pld_snoc_ce_request_irq(struct device *dev,
 					  unsigned int ce_id,
 					  irqreturn_t (*handler)(int, void *),