USB: EHCI: fix build error by making ChipIdea host a normal EHCI driver

This patch (as1627) splits the ehci-hcd core code, which has become a
separate library module, out from the ChipIdea host driver.  Instead
of #include-ing ehci-hcd.c directly, the ChipIdea module will now use
the ehci-hcd library in a normal fashion.

This fixes a build error caused by commit
3e023203 (USB: EHCI: prepare to make
ehci-hcd a library module); I had forgotten about the unorthodox way
the ChipIdea driver uses the ehci-hcd code.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Acked-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/Kconfig

@@ -20,6 +20,7 @@ config USB_CHIPIDEA_UDC
 config USB_CHIPIDEA_HOST
 	bool "ChipIdea host controller"
 	depends on USB=y || USB=USB_CHIPIDEA
+	depends on USB_EHCI_HCD
 	select USB_EHCI_ROOT_HUB_TT
 	help
 	  Say Y here to enable host controller functionality of the

drivers/usb/chipidea/host.c

@@ -25,57 +25,18 @@
 #include <linux/usb/chipidea.h>
 
 #define CHIPIDEA_EHCI
-#include "../host/ehci-hcd.c"
+#include "../host/ehci.h"
 
 #include "ci.h"
 #include "bits.h"
 #include "host.h"
 
-static const struct hc_driver ci_ehci_hc_driver = {
-	.description	= "ehci_hcd",
-	.product_desc	= "ChipIdea HDRC EHCI",
-	.hcd_priv_size	= sizeof(struct ehci_hcd),
-
-	/*
-	 * generic hardware linkage
-	 */
-	.irq	= ehci_irq,
-	.flags	= HCD_MEMORY | HCD_USB2,
-
-	/*
-	 * basic lifecycle operations
-	 */
-	.reset		= ehci_setup,
-	.start		= ehci_run,
-	.stop		= ehci_stop,
-	.shutdown	= ehci_shutdown,
-
-	/*
-	 * managing i/o requests and associated device resources
-	 */
-	.urb_enqueue		= ehci_urb_enqueue,
-	.urb_dequeue		= ehci_urb_dequeue,
-	.endpoint_disable	= ehci_endpoint_disable,
-	.endpoint_reset		= ehci_endpoint_reset,
-
-	/*
-	 * scheduling support
-	 */
-	.get_frame_number = ehci_get_frame,
-
-	/*
-	 * root hub support
-	 */
-	.hub_status_data	= ehci_hub_status_data,
-	.hub_control		= ehci_hub_control,
-	.bus_suspend		= ehci_bus_suspend,
-	.bus_resume		= ehci_bus_resume,
-	.relinquish_port	= ehci_relinquish_port,
-	.port_handed_over	= ehci_port_handed_over,
-
-	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+static const struct ehci_driver_overrides ci_overrides = {
+	.product_desc =		"ChipIdea HDRC EHCI host controller",
 };
 
+static struct hc_driver __read_mostly ci_ehci_hc_driver;
+
 static irqreturn_t host_irq(struct ci13xxx *ci)
 {
 	return usb_hcd_irq(ci->irq, ci->hcd);
@@ -141,5 +102,7 @@ int ci_hdrc_host_init(struct ci13xxx *ci)
 	rdrv->name	= "host";
 	ci->roles[CI_ROLE_HOST] = rdrv;
 
+	ehci_init_driver(&ci_ehci_hc_driver, &ci_overrides);
+
 	return 0;
 }

drivers/usb/host/ehci-hcd.c

@@ -1240,14 +1240,6 @@ EXPORT_SYMBOL_GPL(ehci_init_driver);
 
 /*-------------------------------------------------------------------------*/
 
-/*
- * The EHCI in ChipIdea HDRC cannot be a separate module or device,
- * because its registers (and irq) are shared between host/gadget/otg
- * functions  and in order to facilitate role switching we cannot
- * give the ehci driver exclusive access to those.
- */
-#ifndef CHIPIDEA_EHCI
-
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_AUTHOR (DRIVER_AUTHOR);
 MODULE_LICENSE ("GPL");
@@ -1359,6 +1351,7 @@ MODULE_LICENSE ("GPL");
 
 #if !IS_ENABLED(CONFIG_USB_EHCI_PCI) && \
 	!IS_ENABLED(CONFIG_USB_EHCI_HCD_PLATFORM) && \
+	!defined(CONFIG_USB_CHIPIDEA_HOST) && \
 	!defined(PLATFORM_DRIVER) && \
 	!defined(PS3_SYSTEM_BUS_DRIVER) && \
 	!defined(OF_PLATFORM_DRIVER) && \
@@ -1464,5 +1457,3 @@ static void __exit ehci_hcd_cleanup(void)
 	clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
 }
 module_exit(ehci_hcd_cleanup);
-
-#endif /* CHIPIDEA_EHCI */