Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6

* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (172 commits)
  USB: Add support for SuperSpeed isoc endpoints
  xhci: Clean up cycle bit math used during stalls.
  xhci: Fix cycle bit calculation during stall handling.
  xhci: Update internal dequeue pointers after stalls.
  USB: Disable auto-suspend for USB 3.0 hubs.
  USB: Remove bogus USB_PORT_STAT_SUPER_SPEED symbol.
  xhci: Return canceled URBs immediately when host is halted.
  xhci: Fixes for suspend/resume of shared HCDs.
  xhci: Fix re-init on power loss after resume.
  xhci: Make roothub functions deal with device removal.
  xhci: Limit roothub ports to 15 USB3 & 31 USB2 ports.
  xhci: Return a USB 3.0 hub descriptor for USB3 roothub.
  xhci: Register second xHCI roothub.
  xhci: Change xhci_find_slot_id_by_port() API.
  xhci: Refactor bus suspend state into a struct.
  xhci: Index with a port array instead of PORTSC addresses.
  USB: Set usb_hcd->state and flags for shared roothubs.
  usb: Make core allocate resources per PCI-device.
  usb: Store bus type in usb_hcd, not in driver flags.
  usb: Change usb_hcd->bandwidth_mutex to a pointer.
  ...

1 files changed, 114 insertions, 10 deletions

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index bb668a894ab9..ceea9f33491c 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -50,13 +50,45 @@ static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
 /* called during probe() after chip reset completes */
 static int xhci_pci_setup(struct usb_hcd *hcd)
 {
-	struct xhci_hcd		*xhci = hcd_to_xhci(hcd);
+	struct xhci_hcd		*xhci;
 	struct pci_dev		*pdev = to_pci_dev(hcd->self.controller);
 	int			retval;
 	u32			temp;
 
 	hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 2;
 
+	if (usb_hcd_is_primary_hcd(hcd)) {
+		xhci = kzalloc(sizeof(struct xhci_hcd), GFP_KERNEL);
+		if (!xhci)
+			return -ENOMEM;
+		*((struct xhci_hcd **) hcd->hcd_priv) = xhci;
+		xhci->main_hcd = hcd;
+		/* Mark the first roothub as being USB 2.0.
+		 * The xHCI driver will register the USB 3.0 roothub.
+		 */
+		hcd->speed = HCD_USB2;
+		hcd->self.root_hub->speed = USB_SPEED_HIGH;
+		/*
+		 * USB 2.0 roothub under xHCI has an integrated TT,
+		 * (rate matching hub) as opposed to having an OHCI/UHCI
+		 * companion controller.
+		 */
+		hcd->has_tt = 1;
+	} else {
+		/* xHCI private pointer was set in xhci_pci_probe for the second
+		 * registered roothub.
+		 */
+		xhci = hcd_to_xhci(hcd);
+		temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+		if (HCC_64BIT_ADDR(temp)) {
+			xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n");
+			dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64));
+		} else {
+			dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32));
+		}
+		return 0;
+	}
+
 	xhci->cap_regs = hcd->regs;
 	xhci->op_regs = hcd->regs +
 		HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
@@ -85,13 +117,13 @@ static int xhci_pci_setup(struct usb_hcd *hcd)
 	/* Make sure the HC is halted. */
 	retval = xhci_halt(xhci);
 	if (retval)
-		return retval;
+		goto error;
 
 	xhci_dbg(xhci, "Resetting HCD\n");
 	/* Reset the internal HC memory state and registers. */
 	retval = xhci_reset(xhci);
 	if (retval)
-		return retval;
+		goto error;
 	xhci_dbg(xhci, "Reset complete\n");
 
 	temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
@@ -106,14 +138,85 @@ static int xhci_pci_setup(struct usb_hcd *hcd)
 	/* Initialize HCD and host controller data structures. */
 	retval = xhci_init(hcd);
 	if (retval)
-		return retval;
+		goto error;
 	xhci_dbg(xhci, "Called HCD init\n");
 
 	pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
 	xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
 
 	/* Find any debug ports */
-	return xhci_pci_reinit(xhci, pdev);
+	retval = xhci_pci_reinit(xhci, pdev);
+	if (!retval)
+		return retval;
+
+error:
+	kfree(xhci);
+	return retval;
+}
+
+/*
+ * We need to register our own PCI probe function (instead of the USB core's
+ * function) in order to create a second roothub under xHCI.
+ */
+static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	int retval;
+	struct xhci_hcd *xhci;
+	struct hc_driver *driver;
+	struct usb_hcd *hcd;
+
+	driver = (struct hc_driver *)id->driver_data;
+	/* Register the USB 2.0 roothub.
+	 * FIXME: USB core must know to register the USB 2.0 roothub first.
+	 * This is sort of silly, because we could just set the HCD driver flags
+	 * to say USB 2.0, but I'm not sure what the implications would be in
+	 * the other parts of the HCD code.
+	 */
+	retval = usb_hcd_pci_probe(dev, id);
+
+	if (retval)
+		return retval;
+
+	/* USB 2.0 roothub is stored in the PCI device now. */
+	hcd = dev_get_drvdata(&dev->dev);
+	xhci = hcd_to_xhci(hcd);
+	xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev,
+				pci_name(dev), hcd);
+	if (!xhci->shared_hcd) {
+		retval = -ENOMEM;
+		goto dealloc_usb2_hcd;
+	}
+
+	/* Set the xHCI pointer before xhci_pci_setup() (aka hcd_driver.reset)
+	 * is called by usb_add_hcd().
+	 */
+	*((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
+
+	retval = usb_add_hcd(xhci->shared_hcd, dev->irq,
+			IRQF_DISABLED | IRQF_SHARED);
+	if (retval)
+		goto put_usb3_hcd;
+	/* Roothub already marked as USB 3.0 speed */
+	return 0;
+
+put_usb3_hcd:
+	usb_put_hcd(xhci->shared_hcd);
+dealloc_usb2_hcd:
+	usb_hcd_pci_remove(dev);
+	return retval;
+}
+
+static void xhci_pci_remove(struct pci_dev *dev)
+{
+	struct xhci_hcd *xhci;
+
+	xhci = hcd_to_xhci(pci_get_drvdata(dev));
+	if (xhci->shared_hcd) {
+		usb_remove_hcd(xhci->shared_hcd);
+		usb_put_hcd(xhci->shared_hcd);
+	}
+	usb_hcd_pci_remove(dev);
+	kfree(xhci);
 }
 
 #ifdef CONFIG_PM
@@ -122,7 +225,8 @@ static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	int	retval = 0;
 
-	if (hcd->state != HC_STATE_SUSPENDED)
+	if (hcd->state != HC_STATE_SUSPENDED ||
+			xhci->shared_hcd->state != HC_STATE_SUSPENDED)
 		return -EINVAL;
 
 	retval = xhci_suspend(xhci);
@@ -143,13 +247,13 @@ static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 static const struct hc_driver xhci_pci_hc_driver = {
 	.description =		hcd_name,
 	.product_desc =		"xHCI Host Controller",
-	.hcd_priv_size =	sizeof(struct xhci_hcd),
+	.hcd_priv_size =	sizeof(struct xhci_hcd *),
 
 	/*
 	 * generic hardware linkage
 	 */
 	.irq =			xhci_irq,
-	.flags =		HCD_MEMORY | HCD_USB3,
+	.flags =		HCD_MEMORY | HCD_USB3 | HCD_SHARED,
 
 	/*
 	 * basic lifecycle operations
@@ -210,8 +314,8 @@ static struct pci_driver xhci_pci_driver = {
 	.name =		(char *) hcd_name,
 	.id_table =	pci_ids,
 
-	.probe =	usb_hcd_pci_probe,
-	.remove =	usb_hcd_pci_remove,
+	.probe =	xhci_pci_probe,
+	.remove =	xhci_pci_remove,
 	/* suspend and resume implemented later */
 
 	.shutdown = 	usb_hcd_pci_shutdown,