From 5ca0fcdea508f0d55153baed58d1fb88d7bf0678 Mon Sep 17 00:00:00 2001
From: Zhanyong Wang <zhanyong.wang@mediatek.com>
Date: Thu, 17 Jun 2021 16:09:04 +0800
Subject: [PATCH] [PATCH][PATCH 1/1] usb: add embedded Host feature support

add EH(Embedded Host) feature for PET authentication
1. need CONFIG_USB_OTG_WHITELIST enable
   CONFIG_USB_OTG_WHITELIST=y

2. host device tree node need include "tpl-support" keyword
   &xhci {
	   tpl-support;
   }

Signed-off-by: Zhanyong Wang <zhanyong.wang@mediatek.com>
---
 drivers/usb/core/hub.c           |  9 +++++---
 drivers/usb/core/otg_whitelist.h | 39 ++++++++++++++++++++++++++++++++
 drivers/usb/host/xhci-mtk.c      |  3 +++
 3 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index cd61860cada5..aa0131aae89c 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2413,6 +2413,8 @@ static int usb_enumerate_device(struct usb_device *udev)
 			if (err < 0)
 				dev_dbg(&udev->dev, "HNP fail, %d\n", err);
 		}
+
+		dev_info(&udev->dev, "Unsupported Device!\n");
 		return -ENOTSUPP;
 	}
 
@@ -4728,9 +4730,10 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
 				goto fail;
 			}
 			if (r) {
-				if (r != -ENODEV)
-					dev_err(&udev->dev, "device descriptor read/64, error %d\n",
-							r);
+				if (r != -ENODEV) {
+					dev_err(&udev->dev, "device descriptor read/64, error %d\n", r);
+					dev_info(&udev->dev, "Device No Respond\n");
+				}
 				retval = -EMSGSIZE;
 				continue;
 			}
diff --git a/drivers/usb/core/otg_whitelist.h b/drivers/usb/core/otg_whitelist.h
index 2ae90158ded7..a8dd221334c1 100644
--- a/drivers/usb/core/otg_whitelist.h
+++ b/drivers/usb/core/otg_whitelist.h
@@ -39,9 +39,44 @@ static struct usb_device_id whitelist_table[] = {
 { USB_DEVICE(0x0525, 0xa4a0), },
 #endif
 
+/* xhci-mtk usb3 root-hub */
+{ USB_DEVICE(0x1d6b, 0x0003), },
+
+/* xhci-mtk usb2 root-hub */
+{ USB_DEVICE(0x1d6b, 0x0002), },
+
+/*  */
+{ USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, 0, 0) },
+
 { }	/* Terminating entry */
 };
 
+static bool usb_match_any_interface(struct usb_device *udev,
+				    const struct usb_device_id *id)
+{
+	unsigned int i;
+
+	for (i = 0; i < udev->descriptor.bNumConfigurations; ++i) {
+		struct usb_host_config *cfg = &udev->config[i];
+		unsigned int j;
+
+		for (j = 0; j < cfg->desc.bNumInterfaces; ++j) {
+			struct usb_interface_cache *cache;
+			struct usb_host_interface *intf;
+
+			cache = cfg->intf_cache[j];
+			if (cache->num_altsetting == 0)
+				continue;
+
+			intf = &cache->altsetting[0];
+			if (id->bInterfaceClass == intf->desc.bInterfaceClass)
+				return true;
+		}
+	}
+
+	return false;
+}
+
 static int is_targeted(struct usb_device *dev)
 {
 	struct usb_device_id	*id = whitelist_table;
@@ -90,6 +125,10 @@ static int is_targeted(struct usb_device *dev)
 		    (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
 			continue;
 
+		if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_INFO) &&
+		    !usb_match_any_interface(dev, id))
+			continue;
+
 		return 1;
 	}
 
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 5c0eb35cd007..5714103fd3b9 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -18,6 +18,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
+#include <linux/usb/of.h>
 
 #include "xhci.h"
 #include "xhci-mtk.h"
@@ -559,6 +560,8 @@ static int xhci_mtk_probe(struct platform_device *pdev)
 		goto disable_device_wakeup;
 	}
 
+	hcd->tpl_support = of_usb_host_tpl_support(node);
+	xhci->shared_hcd->tpl_support = hcd->tpl_support;
 	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (ret)
 		goto put_usb3_hcd;
-- 
2.18.0