wusb: hub code recognizes wusb ports

This patch enables the USB stack to recognize WUSB devices (from a
WUSB HCD) and assigns them the proper speed setting
(USB_SPEED_VARIABLE).

1. Introduce usb_hcd->wireless to mark a host controller instance as
   being wireless, and thus having wireless 'fake' ports. 

   [discarded previous model of using a reserved bit in the port_stat
   struct to do this; thanks to Alan Stern for indicating the
   proper way to do it].

2. Introduce hub.c:hub_is_wusb() that tests if a hub is a WUSB root
   hub (WUSB doesn't have non-root hubs).

New code being pushed to linuxuwb.org requires this patch to connect WUSB
devices.

Signed-off-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 16 insertions, 1 deletions

diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index 58c7767bc90..fc71a08a1af 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -85,6 +85,7 @@ struct usb_hcd {	/* usb_bus.hcpriv points to this */
         unsigned                uses_new_polling:1;
         unsigned                poll_rh:1;      /* poll for rh status? */
         unsigned                poll_pending:1; /* status has changed? */
+        unsigned                wireless:1;     /* Wireless USB HCD */
 
         int                     irq;            /* irq allocated */
         void __iomem            *regs;          /* device memory/io */
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index bdf5be09965..db4a9be1cb8 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1331,6 +1331,18 @@ static int hub_port_status(struct usb_hub *hub, int port1,
         return ret;
 }
 
+
+/* Returns 1 if @hub is a WUSB root hub, 0 otherwise */
+static unsigned hub_is_wusb(struct usb_hub *hub)
+{
+        struct usb_hcd *hcd;
+        if (hub->hdev->parent != NULL)  /* not a root hub? */
+                return 0;
+        hcd = container_of(hub->hdev->bus, struct usb_hcd, self);
+        return hcd->wireless;
+}
+
+
 #define PORT_RESET_TRIES        5
 #define SET_ADDRESS_TRIES       2
 #define GET_DESCRIPTOR_TRIES    2
@@ -1371,7 +1383,9 @@ static int hub_port_wait_reset(struct usb_hub *hub, int port1,
                 /* if we`ve finished resetting, then break out of the loop */
                 if (!(portstatus & USB_PORT_STAT_RESET) &&
                     (portstatus & USB_PORT_STAT_ENABLE)) {
-                        if (portstatus & USB_PORT_STAT_HIGH_SPEED)
+                        if (hub_is_wusb(hub))
+                                udev->speed = USB_SPEED_VARIABLE;
+                        else if (portstatus & USB_PORT_STAT_HIGH_SPEED)
                                 udev->speed = USB_SPEED_HIGH;
                         else if (portstatus & USB_PORT_STAT_LOW_SPEED)
                                 udev->speed = USB_SPEED_LOW;