USB: OHCI: prepare to make ohci-hcd a library module

This patch prepares ohci-hcd for being split up into a core
library and separate platform driver modules.  A generic
ohci_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
ohci_restart(),ohci_suspend() and ohci_resume() routines need
to be EXPORTed for use by the drivers.

Added ohci_setip(() and ohci_start() routine for to start the generic
controller rather than each having its own idiosyncratic approach.
This allow to clean duplicated code in most of SOC driver

In V2:
 -ohci_hcd_init() ohci_run() and ohci_stop() are not made non-static.
 -Adds the ohci_setup() and ohci_start() routine.

In V3:
 -purpose of ohci_setup() and ohci_start() function description written in the patch
  description.
 -ohci_init() are not made non-static but now called beginning of the ohci_restart().
 -ohci_run() signature change reverted back.
 -unrelated changes removed.
 -duplicate comment line removed.
 -inline ohci_suspend() and ohci_resume() is not needed so removed from ohci.h file.

In V4:
 -ohci-init() EXPORTed because it is called by all bus glue modules.
 -ohci-setup() removed from 1/2 added into 2/2 patch.

In V5:
 -Again ohci_setup() is added and EXPORTed because to replace the ohci_init() from
  all bus glues.
 -ohci_init() is not made non-static function.

In V6:
  -ohci_init() call is removed from ohci_quirk_nec_worker(), because it is already called in ohci_restart().

In V8:
  -ohci_hcd_init() is called by ohci_setup() to make generic ohci initialization in all ohci drivers.

Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index d3299143d9e..3b584822246 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -718,3 +718,20 @@ static inline u32 roothub_status (struct ohci_hcd *hc)
 	{ return ohci_readl (hc, &hc->regs->roothub.status); }
 static inline u32 roothub_portstatus (struct ohci_hcd *hc, int i)
 	{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }
+
+/* Declarations of things exported for use by ohci platform drivers */
+
+struct ohci_driver_overrides {
+	const char	*product_desc;
+	size_t		extra_priv_size;
+	int		(*reset)(struct usb_hcd *hcd);
+};
+
+extern void	ohci_init_driver(struct hc_driver *drv,
+				const struct ohci_driver_overrides *over);
+extern int	ohci_restart(struct ohci_hcd *ohci);
+extern int	ohci_setup(struct usb_hcd *hcd);
+#ifdef CONFIG_PM
+extern int	ohci_suspend(struct usb_hcd *hcd, bool do_wakeup);
+extern int	ohci_resume(struct usb_hcd *hcd, bool hibernated);
+#endif