USB: EHCI: make ehci-pci a separate driver
This patch (as1625) splits the PCI portion of ehci-hcd out into its
own separate driver module, called ehci-pci. Consistently with the
current practice, the decision whether to build this module is not
user-configurable. If EHCI and PCI are enabled then the module will
be built, always.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index c92dcae..46018e9 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -18,9 +18,18 @@
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#ifndef CONFIG_PCI
-#error "This file is PCI bus glue. CONFIG_PCI must be defined."
-#endif
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ehci.h"
+#include "pci-quirks.h"
+
+#define DRIVER_DESC "EHCI PCI platform driver"
+
+static const char hcd_name[] = "ehci-pci";
/* defined here to avoid adding to pci_ids.h for single instance use */
#define PCI_DEVICE_ID_INTEL_CE4100_USB 0x2e70
@@ -315,11 +324,6 @@
* Also they depend on separate root hub suspend/resume.
*/
-static int ehci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
-{
- return ehci_suspend(hcd, do_wakeup);
-}
-
static bool usb_is_intel_switchable_ehci(struct pci_dev *pdev)
{
return pdev->class == PCI_CLASS_SERIAL_USB_EHCI &&
@@ -370,55 +374,18 @@
(void) ehci_pci_reinit(ehci, pdev);
return 0;
}
-#endif
-static const struct hc_driver ehci_pci_hc_driver = {
- .description = hcd_name,
- .product_desc = "EHCI Host Controller",
- .hcd_priv_size = sizeof(struct ehci_hcd),
+#else
- /*
- * generic hardware linkage
- */
- .irq = ehci_irq,
- .flags = HCD_MEMORY | HCD_USB2,
+#define ehci_suspend NULL
+#define ehci_pci_resume NULL
+#endif /* CONFIG_PM */
- /*
- * basic lifecycle operations
- */
+static struct hc_driver __read_mostly ehci_pci_hc_driver;
+
+static const struct ehci_driver_overrides overrides = {
+ .product_desc = "EHCI PCI host controller",
.reset = ehci_pci_setup,
- .start = ehci_run,
-#ifdef CONFIG_PM
- .pci_suspend = ehci_pci_suspend,
- .pci_resume = ehci_pci_resume,
-#endif
- .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,
};
/*-------------------------------------------------------------------------*/
@@ -451,3 +418,31 @@
},
#endif
};
+
+static int __init ehci_pci_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ehci_init_driver(&ehci_pci_hc_driver, &overrides);
+
+ /* Entries for the PCI suspend/resume callbacks are special */
+ ehci_pci_hc_driver.pci_suspend = ehci_suspend;
+ ehci_pci_hc_driver.pci_resume = ehci_pci_resume;
+
+ return pci_register_driver(&ehci_pci_driver);
+}
+module_init(ehci_pci_init);
+
+static void __exit ehci_pci_cleanup(void)
+{
+ pci_unregister_driver(&ehci_pci_driver);
+}
+module_exit(ehci_pci_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("David Brownell");
+MODULE_AUTHOR("Alan Stern");
+MODULE_LICENSE("GPL");