xhci: Introduce xhci_init_driver()

Since the struct hc_driver is mostly the same across the xhci-pci,
xhci-plat, and the upcoming xhci-tegra driver, introduce the function
xhci_init_driver() which will populate the hc_driver with the default
xHCI operations.  The caller must supply a setup function which will
be used as the hc_driver's reset callback.

Note that xhci-plat also overrides the default ->start() callback so
that it can do rcar-specific initialization.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 54 deletions

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 1a0cf9f31e43..f35236805a62 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -23,6 +23,8 @@
 #include "xhci-mvebu.h"
 #include "xhci-rcar.h"
 
+static struct hc_driver __read_mostly xhci_plat_hc_driver;
+
 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
 	/*
@@ -60,59 +62,6 @@ static int xhci_plat_start(struct usb_hcd *hcd)
 	return xhci_run(hcd);
 }
 
-static const struct hc_driver xhci_plat_xhci_driver = {
-	.description =		"xhci-hcd",
-	.product_desc =		"xHCI Host Controller",
-	.hcd_priv_size =	sizeof(struct xhci_hcd *),
-
-	/*
-	 * generic hardware linkage
-	 */
-	.irq =			xhci_irq,
-	.flags =		HCD_MEMORY | HCD_USB3 | HCD_SHARED,
-
-	/*
-	 * basic lifecycle operations
-	 */
-	.reset =		xhci_plat_setup,
-	.start =		xhci_plat_start,
-	.stop =			xhci_stop,
-	.shutdown =		xhci_shutdown,
-
-	/*
-	 * managing i/o requests and associated device resources
-	 */
-	.urb_enqueue =		xhci_urb_enqueue,
-	.urb_dequeue =		xhci_urb_dequeue,
-	.alloc_dev =		xhci_alloc_dev,
-	.free_dev =		xhci_free_dev,
-	.alloc_streams =	xhci_alloc_streams,
-	.free_streams =		xhci_free_streams,
-	.add_endpoint =		xhci_add_endpoint,
-	.drop_endpoint =	xhci_drop_endpoint,
-	.endpoint_reset =	xhci_endpoint_reset,
-	.check_bandwidth =	xhci_check_bandwidth,
-	.reset_bandwidth =	xhci_reset_bandwidth,
-	.address_device =	xhci_address_device,
-	.enable_device =	xhci_enable_device,
-	.update_hub_device =	xhci_update_hub_device,
-	.reset_device =		xhci_discover_or_reset_device,
-
-	/*
-	 * scheduling support
-	 */
-	.get_frame_number =	xhci_get_frame,
-
-	/* Root hub support */
-	.hub_control =		xhci_hub_control,
-	.hub_status_data =	xhci_hub_status_data,
-	.bus_suspend =		xhci_bus_suspend,
-	.bus_resume =		xhci_bus_resume,
-
-	.enable_usb3_lpm_timeout =	xhci_enable_usb3_lpm_timeout,
-	.disable_usb3_lpm_timeout =	xhci_disable_usb3_lpm_timeout,
-};
-
 static int xhci_plat_probe(struct platform_device *pdev)
 {
 	struct device_node	*node = pdev->dev.of_node;
@@ -128,7 +77,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (usb_disabled())
 		return -ENODEV;
 
-	driver = &xhci_plat_xhci_driver;
+	driver = &xhci_plat_hc_driver;
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
@@ -300,6 +249,8 @@ MODULE_ALIAS("platform:xhci-hcd");
 
 int xhci_register_plat(void)
 {
+	xhci_init_driver(&xhci_plat_hc_driver, xhci_plat_setup);
+	xhci_plat_hc_driver.start = xhci_plat_start;
 	return platform_driver_register(&usb_xhci_driver);
 }