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
3e0232039967d7a1a06c013d097458b4d5892af1 (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: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 9 insertions, 54 deletions

diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig
index 1ea932a13685..608a2aeb400c 100644
--- a/drivers/usb/chipidea/Kconfig
+++ b/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
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index ebc041ff9cd5..30b17ae5aa22 100644
--- a/drivers/usb/chipidea/host.c
+++ b/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;
 }
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 4a466d7730c5..28f694eb624b 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/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 */