qcacld-3.0: Add support for pld_is_fw_down in usb

Add support for pld_is_fw_down in usb case.

Change-Id: I2103964c6413734ec4f156fe3058e67984b8e09b
CRs-fixed: 2432112

core/pld/src/pld_common.c

@@ -1615,8 +1615,8 @@ int pld_is_qmi_disable(struct device *dev)
  *
  * This API will be called to check if WLAN FW is down or not.
  *
- *  Return: 1 FW is down
- *          0 FW is not down
+ *  Return: 0 FW is not down
+ *          Otherwise FW is down
  *          Always return 0 for unsupported bus type
  */
 int pld_is_fw_down(struct device *dev)
@@ -1632,7 +1632,9 @@ int pld_is_fw_down(struct device *dev)
 		ret = pld_pcie_is_fw_down(dev);
 		break;
 	case PLD_BUS_TYPE_SDIO:
+		break;
 	case PLD_BUS_TYPE_USB:
+		ret = pld_usb_is_fw_down(dev);
 		break;
 	default:
 		pr_err("Invalid device type %d\n", type);

core/pld/src/pld_usb.c

@@ -253,6 +253,11 @@ int pld_usb_wlan_enable(struct device *dev, struct pld_wlan_enable_cfg *config,
 	return cnss_wlan_enable(dev, &cfg, cnss_mode, host_version);
 }
 
+int pld_usb_is_fw_down(struct device *dev)
+{
+	return cnss_usb_is_device_down(dev);
+}
+
 #else /* CONFIG_PLD_USB_CNSS */
 
 struct usb_driver pld_usb_ops = {
@@ -317,4 +322,10 @@ int pld_usb_wlan_enable(struct device *dev, struct pld_wlan_enable_cfg *config,
 {
 	return 0;
 }
+
+int pld_usb_is_fw_down(struct device *dev)
+{
+	return 0;
+}
+
 #endif /* CONFIG_PLD_USB_CNSS */

core/pld/src/pld_usb.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2019 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
@@ -26,6 +26,8 @@ void pld_usb_unregister_driver(void);
 int pld_usb_get_ce_id(int irq);
 int pld_usb_wlan_enable(struct device *dev, struct pld_wlan_enable_cfg *config,
 			enum pld_driver_mode mode, const char *host_version);
+int pld_usb_is_fw_down(struct device *dev);
+
 #else
 static inline int pld_usb_register_driver(void)
 {
@@ -42,6 +44,12 @@ static inline int pld_usb_wlan_enable(struct device *dev,
 {
 	return 0;
 }
+
+static inline int pld_usb_is_fw_down(struct device *dev)
+{
+	return  0;
+}
+
 #endif
 
 static inline int