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authorAlan Stern <stern@rowland.harvard.edu>2012-11-01 11:12:58 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-01 08:51:12 -0700
commit3e0232039967d7a1a06c013d097458b4d5892af1 (patch)
treea7c05f48029f141bb26a7910080be3d8430b928a /drivers/usb/host
parent7c83b4483606f5fe14127249336ac53ef177a63a (diff)
USB: EHCI: prepare to make ehci-hcd a library module
This patch (as1624) prepares ehci-hcd for being split up into a core library and separate platform driver modules. A generic ehci_hc_driver structure is created, containing all the "standard" values, and a new mechanism is added whereby a driver module can specify a set of overrides to those values. In addition the ehci_setup(), ehci_suspend(), and ehci_resume() routines need to be EXPORTed for use by the drivers. As a side effect of this change, a few routines no longer need to be marked __maybe_unused. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/ehci-hcd.c73
-rw-r--r--drivers/usb/host/ehci-hub.c6
-rw-r--r--drivers/usb/host/ehci.h17
3 files changed, 89 insertions, 7 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index ab4a769a410..dee3541bfae 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -649,7 +649,7 @@ static int ehci_run (struct usb_hcd *hcd)
return 0;
}
-static int ehci_setup(struct usb_hcd *hcd)
+int ehci_setup(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int retval;
@@ -680,6 +680,7 @@ static int ehci_setup(struct usb_hcd *hcd)
return 0;
}
+EXPORT_SYMBOL_GPL(ehci_setup);
/*-------------------------------------------------------------------------*/
@@ -1085,7 +1086,7 @@ static int ehci_get_frame (struct usb_hcd *hcd)
/* These routines handle the generic parts of controller suspend/resume */
-static int __maybe_unused ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
+int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
@@ -1108,9 +1109,10 @@ static int __maybe_unused ehci_suspend(struct usb_hcd *hcd, bool do_wakeup)
return 0;
}
+EXPORT_SYMBOL_GPL(ehci_suspend);
/* Returns 0 if power was preserved, 1 if power was lost */
-static int __maybe_unused ehci_resume(struct usb_hcd *hcd, bool hibernated)
+int ehci_resume(struct usb_hcd *hcd, bool hibernated)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
@@ -1168,12 +1170,77 @@ static int __maybe_unused ehci_resume(struct usb_hcd *hcd, bool hibernated)
return 1;
}
+EXPORT_SYMBOL_GPL(ehci_resume);
#endif
/*-------------------------------------------------------------------------*/
/*
+ * Generic structure: This gets copied for platform drivers so that
+ * individual entries can be overridden as needed.
+ */
+
+static const struct hc_driver ehci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "EHCI Host Controller",
+ .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,
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+
+ /*
+ * 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,
+};
+
+void ehci_init_driver(struct hc_driver *drv,
+ const struct ehci_driver_overrides *over)
+{
+ /* Copy the generic table to drv and then apply the overrides */
+ *drv = ehci_hc_driver;
+
+ drv->product_desc = over->product_desc;
+ drv->hcd_priv_size += over->extra_priv_size;
+ if (over->reset)
+ drv->reset = over->reset;
+}
+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
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index a59c61fea09..4ccb97c0678 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -1109,8 +1109,7 @@ error_exit:
return retval;
}
-static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
- int portnum)
+static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
@@ -1119,8 +1118,7 @@ static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
set_owner(ehci, --portnum, PORT_OWNER);
}
-static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
- int portnum)
+static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
u32 __iomem *reg;
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 2262dcdaa3c..24a8ada4701 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -781,4 +781,21 @@ static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
/*-------------------------------------------------------------------------*/
+/* Declarations of things exported for use by ehci platform drivers */
+
+struct ehci_driver_overrides {
+ const char *product_desc;
+ size_t extra_priv_size;
+ int (*reset)(struct usb_hcd *hcd);
+};
+
+extern void ehci_init_driver(struct hc_driver *drv,
+ const struct ehci_driver_overrides *over);
+extern int ehci_setup(struct usb_hcd *hcd);
+
+#ifdef CONFIG_PM
+extern int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);
+extern int ehci_resume(struct usb_hcd *hcd, bool hibernated);
+#endif /* CONFIG_PM */
+
#endif /* __LINUX_EHCI_HCD_H */