usb: core: TPL should apply for both OTG and EH

According to On-The-Go and Embedded Host Supplement to the USB Revision
2.0 Specification, the targeted hosts (non-PC hosts) include both
embedded hosts and otg, and each targeted host product defines the
set of supported peripherals on a TPL (Targeted Peripheral List). So,
TPL should apply for both OTG and embedded host, and the otg support is
not a must for embedded host.

The TPL support feature will only be effect when CONFIG_USB_OTG_WHITELIST
has been chosen and hcd->tpl_support flag is set, it can avoid the enumeration
fails problem for the user who chooses CONFIG_USB_OTG_WHITELIST wrongly.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 18 insertions, 28 deletions

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index c01b72467524..db1d587cbb95 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -32,6 +32,7 @@
 #include <asm/byteorder.h>
 
 #include "hub.h"
+#include "otg_whitelist.h"
 
 #define USB_VENDOR_GENESYS_LOGIC		0x05e3
 #define HUB_QUIRK_CHECK_PORT_AUTOSUSPEND	0x01
@@ -2205,9 +2206,6 @@ static void announce_device(struct usb_device *udev)
 static inline void announce_device(struct usb_device *udev) { }
 #endif
 
-#ifdef	CONFIG_USB_OTG
-#include "otg_whitelist.h"
-#endif
 
 /**
  * usb_enumerate_device_otg - FIXME (usbcore-internal)
@@ -2267,21 +2265,6 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
 			}
 		}
 	}
-
-	if (!is_targeted(udev)) {
-
-		/* Maybe it can talk to us, though we can't talk to it.
-		 * (Includes HNP test device.)
-		 */
-		if (udev->bus->b_hnp_enable || udev->bus->is_b_host) {
-			err = usb_port_suspend(udev, PMSG_SUSPEND);
-			if (err < 0)
-				dev_dbg(&udev->dev, "HNP fail, %d\n", err);
-		}
-		err = -ENOTSUPP;
-		goto fail;
-	}
-fail:
 #endif
 	return err;
 }
@@ -2304,6 +2287,7 @@ fail:
 static int usb_enumerate_device(struct usb_device *udev)
 {
 	int err;
+	struct usb_hcd *hcd = bus_to_hcd(udev->bus);
 
 	if (udev->config == NULL) {
 		err = usb_get_configuration(udev);
@@ -2325,6 +2309,19 @@ static int usb_enumerate_device(struct usb_device *udev)
 	if (err < 0)
 		return err;
 
+	if (IS_ENABLED(CONFIG_USB_OTG_WHITELIST) && hcd->tpl_support &&
+		!is_targeted(udev) && IS_ENABLED(CONFIG_USB_OTG)) {
+		/* Maybe it can talk to us, though we can't talk to it.
+		 * (Includes HNP test device.)
+		 */
+		if (udev->bus->b_hnp_enable || udev->bus->is_b_host) {
+			err = usb_port_suspend(udev, PMSG_AUTO_SUSPEND);
+			if (err < 0)
+				dev_dbg(&udev->dev, "HNP fail, %d\n", err);
+		}
+		return -ENOTSUPP;
+	}
+
 	usb_detect_interface_quirks(udev);
 
 	return 0;
diff --git a/drivers/usb/core/otg_whitelist.h b/drivers/usb/core/otg_whitelist.h
index e8cdce571bb1..de0c9c9d7091 100644
--- a/drivers/usb/core/otg_whitelist.h
+++ b/drivers/usb/core/otg_whitelist.h
@@ -10,8 +10,8 @@
  */
 
 /*
- * This OTG Whitelist is the OTG "Targeted Peripheral List".  It should
- * mostly use of USB_DEVICE() or USB_DEVICE_VER() entries..
+ * This OTG and Embedded Host Whitelist is "Targeted Peripheral List".
+ * It should mostly use of USB_DEVICE() or USB_DEVICE_VER() entries..
  *
  * YOU _SHOULD_ CHANGE THIS LIST TO MATCH YOUR PRODUCT AND ITS TESTING!
  */
@@ -50,10 +50,6 @@ static int is_targeted(struct usb_device *dev)
 {
 	struct usb_device_id	*id = whitelist_table;
 
-	/* possible in developer configs only! */
-	if (!dev->bus->otg_port)
-		return 1;
-
 	/* HNP test device is _never_ targeted (see OTG spec 6.6.6) */
 	if ((le16_to_cpu(dev->descriptor.idVendor) == 0x1a0a &&
 	     le16_to_cpu(dev->descriptor.idProduct) == 0xbadd))
@@ -103,10 +99,7 @@ static int is_targeted(struct usb_device *dev)
 	dev_err(&dev->dev, "device v%04x p%04x is not supported\n",
 		le16_to_cpu(dev->descriptor.idVendor),
 		le16_to_cpu(dev->descriptor.idProduct));
-#ifdef	CONFIG_USB_OTG_WHITELIST
+
 	return 0;
-#else
-	return 1;
-#endif
 }