qcacmn: add new api to get the bus reg dump

Add new wrapper to get the bus specific register information via
the bus driver.

Change-Id: I544b23c8f6654e9215fb4f03203d6754c766dada
CRs-Fixed: 2833251

qdf/inc/qdf_platform.h

@@ -303,4 +303,33 @@ void qdf_register_recovery_reason_update(qdf_recovery_reason_update_callback
  */
 void qdf_recovery_reason_update(enum qdf_hang_reason reason);
 
+/**
+ * qdf_bus_reg_dump() - callback for getting bus specific register dump
+ * @dev: Bus specific device
+ * @buf: Hang event buffer in which the data will be populated
+ * @len: length of data to be populated in the hang event buffer
+ *
+ * Return: none
+ */
+typedef void (*qdf_bus_reg_dump)(struct device *dev, uint8_t *buf,
+				 uint32_t len);
+
+/**
+ * qdf_register_get_bus_reg_dump() - Register callback to update bus register
+ *                                   dump
+ * @qdf_bus_reg_dump: callback to update bus register dump
+ *
+ * Return: none
+ */
+void qdf_register_get_bus_reg_dump(qdf_bus_reg_dump callback);
+
+/**
+ * qdf_get_bus_reg_dump() - Get the register dump for the bus
+ * @dev: device
+ * @buffer: buffer for hang data
+ * @len: len of hang data
+ *
+ * Return: none
+ */
+void qdf_get_bus_reg_dump(struct device *dev, uint8_t *buf, uint32_t len);
 #endif /*_QDF_PLATFORM_H*/

qdf/inc/qdf_types.h

@@ -1346,6 +1346,7 @@ enum qdf_suspend_type {
  * @QDF_WMI_BUF_SEQUENCE_MISMATCH: WMI Tx completion buffer sequence mismatch
  * @QDF_HAL_REG_WRITE_FAILURE: HAL register writing failures
  * @QDF_SUSPEND_NO_CREDIT: host lack of credit after suspend
+ * @QCA_HANG_BUS_FAILURE: Bus failure
  */
 enum qdf_hang_reason {
 	QDF_REASON_UNSPECIFIED,
@@ -1371,6 +1372,7 @@ enum qdf_hang_reason {
 	QDF_WMI_BUF_SEQUENCE_MISMATCH,
 	QDF_HAL_REG_WRITE_FAILURE,
 	QDF_SUSPEND_NO_CREDIT,
+	QCA_HANG_BUS_FAILURE,
 };
 
 /**

qdf/src/qdf_platform.c

@@ -32,6 +32,8 @@ static qdf_is_drv_connected_callback    is_drv_connected_cb;
 static qdf_wmi_send_over_qmi_callback _wmi_send_recv_qmi_cb;
 static qdf_is_drv_supported_callback    is_drv_supported_cb;
 static qdf_recovery_reason_update_callback   update_recovery_reason_cb;
+static qdf_bus_reg_dump   get_bus_reg_dump;
+
 
 
 void qdf_register_fw_down_callback(qdf_is_fw_down_callback is_fw_down)
@@ -215,3 +217,20 @@ void qdf_recovery_reason_update(enum qdf_hang_reason reason)
 }
 
 qdf_export_symbol(qdf_recovery_reason_update);
+
+void qdf_register_get_bus_reg_dump(qdf_bus_reg_dump callback)
+{
+	get_bus_reg_dump = callback;
+}
+
+qdf_export_symbol(qdf_register_get_bus_reg_dump);
+
+void qdf_get_bus_reg_dump(struct device *dev, uint8_t *buf, uint32_t len)
+{
+	if (!get_bus_reg_dump)
+		return;
+
+	get_bus_reg_dump(dev, buf, len);
+}
+
+qdf_export_symbol(qdf_get_bus_reg_dump);