cnss2: Add sysfs support for configuring timer sync interval

It can be used to tune the host and fw time synchronization interval
for better accuracy.

Change-Id: I0a3d8895520cec526341f278c91f153dd0bd1966
CRs-Fixed: 3257702

cnss2/bus.c

@@ -581,3 +581,20 @@ int cnss_bus_get_iova_ipa(struct cnss_plat_data *plat_priv, u64 *addr,
 		return -EINVAL;
 	}
 }
+
+int cnss_bus_update_time_sync_period(struct cnss_plat_data *plat_priv,
+				     unsigned int time_sync_period)
+{
+	if (!plat_priv)
+		return -ENODEV;
+
+	switch (plat_priv->bus_type) {
+	case CNSS_BUS_PCI:
+		return cnss_pci_update_time_sync_period(plat_priv->bus_priv,
+							time_sync_period);
+	default:
+		cnss_pr_err("Unsupported bus type: %d\n",
+			    plat_priv->bus_type);
+		return -EINVAL;
+	}
+}

cnss2/bus.h

@@ -70,4 +70,7 @@ int cnss_bus_debug_reg_write(struct cnss_plat_data *plat_priv, u32 offset,
 int cnss_bus_get_iova(struct cnss_plat_data *plat_priv, u64 *addr, u64 *size);
 int cnss_bus_get_iova_ipa(struct cnss_plat_data *plat_priv, u64 *addr,
 			  u64 *size);
+int cnss_bus_update_time_sync_period(struct cnss_plat_data *plat_priv,
+				     unsigned int time_sync_period);
+
 #endif /* _CNSS_BUS_H */

cnss2/main.c

@@ -69,6 +69,7 @@
 #endif
 #define CNSS_BDF_TYPE_DEFAULT		CNSS_BDF_ELF
 #define CNSS_TIME_SYNC_PERIOD_DEFAULT	900000
+#define CNSS_MIN_TIME_SYNC_PERIOD	2000
 #define CNSS_DMS_QMI_CONNECTION_WAIT_MS 50
 #define CNSS_DMS_QMI_CONNECTION_WAIT_RETRY 200
 #define CNSS_DAEMON_CONNECT_TIMEOUT_MS  30000
@@ -3374,6 +3375,37 @@ static ssize_t recovery_show(struct device *dev,
 	return curr_len;
 }
 
+static ssize_t time_sync_period_show(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf)
+{
+	struct cnss_plat_data *plat_priv = dev_get_drvdata(dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%u ms\n",
+			plat_priv->ctrl_params.time_sync_period);
+}
+
+static ssize_t time_sync_period_store(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count)
+{
+	struct cnss_plat_data *plat_priv = dev_get_drvdata(dev);
+	unsigned int time_sync_period = 0;
+
+	if (!plat_priv)
+		return -ENODEV;
+
+	if (sscanf(buf, "%du", &time_sync_period) != 1) {
+		cnss_pr_err("Invalid time sync sysfs command\n");
+		return -EINVAL;
+	}
+
+	if (time_sync_period >= CNSS_MIN_TIME_SYNC_PERIOD)
+		cnss_bus_update_time_sync_period(plat_priv, time_sync_period);
+
+	return count;
+}
+
 static ssize_t recovery_store(struct device *dev,
 			      struct device_attribute *attr,
 			      const char *buf, size_t count)
@@ -3548,6 +3580,7 @@ static DEVICE_ATTR_WO(qdss_trace_stop);
 static DEVICE_ATTR_WO(qdss_conf_download);
 static DEVICE_ATTR_WO(hw_trace_override);
 static DEVICE_ATTR_WO(charger_mode);
+static DEVICE_ATTR_RW(time_sync_period);
 
 static struct attribute *cnss_attrs[] = {
 	&dev_attr_fs_ready.attr,
@@ -3559,6 +3592,7 @@ static struct attribute *cnss_attrs[] = {
 	&dev_attr_qdss_conf_download.attr,
 	&dev_attr_hw_trace_override.attr,
 	&dev_attr_charger_mode.attr,
+	&dev_attr_time_sync_period.attr,
 	NULL,
 };
 

cnss2/pci.c

@@ -2201,6 +2201,25 @@ static void cnss_pci_stop_time_sync_update(struct cnss_pci_data *pci_priv)
 	cancel_delayed_work_sync(&pci_priv->time_sync_work);
 }
 
+int cnss_pci_update_time_sync_period(struct cnss_pci_data *pci_priv,
+				     unsigned int time_sync_period)
+{
+	struct cnss_plat_data *plat_priv;
+
+	if (!pci_priv)
+		return -ENODEV;
+
+	plat_priv = pci_priv->plat_priv;
+
+	cnss_pci_stop_time_sync_update(pci_priv);
+	plat_priv->ctrl_params.time_sync_period = time_sync_period;
+	cnss_pci_start_time_sync_update(pci_priv);
+	cnss_pr_dbg("WLAN time sync period %u ms\n",
+		    plat_priv->ctrl_params.time_sync_period);
+
+	return 0;
+}
+
 int cnss_pci_call_driver_probe(struct cnss_pci_data *pci_priv)
 {
 	int ret = 0;

cnss2/pci.h

@@ -279,4 +279,6 @@ int cnss_pci_get_iova_ipa(struct cnss_pci_data *pci_priv, u64 *addr,
 			  u64 *size);
 void cnss_pci_handle_linkdown(struct cnss_pci_data *pci_priv);
 
+int cnss_pci_update_time_sync_period(struct cnss_pci_data *pci_priv,
+				     unsigned int time_sync_period);
 #endif /* _CNSS_PCI_H */