ehci-platform: add pre_setup() method to platform data

Sometimes there is a need  to initialize some non-standard registers mapped to
the EHCI region before accessing the standard EHCI registers.  Add pre_setup()
method with 'struct usb_hcd *' parameter to be called just before ehci_setup()
to the 'ehci-platform'  driver's platform data for this purpose...

While at it, add the missing incomplete declaration of 'struct platform_device'
to <linux/usb/ehci_pdriver.h>...

The patch has been tested on the Marzen and BOCK-W boards.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index f47f259..d1f5cea 100644 (file)
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -48,6 +48,12 @@ static int ehci_platform_reset(struct usb_hcd *hcd)
        ehci->big_endian_desc = pdata->big_endian_desc;
        ehci->big_endian_mmio = pdata->big_endian_mmio;
 
+       if (pdata->pre_setup) {
+               retval = pdata->pre_setup(hcd);
+               if (retval < 0)
+                       return retval;
+       }
+
        ehci->caps = hcd->regs + pdata->caps_offset;
        retval = ehci_setup(hcd);
        if (retval)

diff --git a/include/linux/usb/ehci_pdriver.h b/include/linux/usb/ehci_pdriver.h
index 99238b0..7eb4dcd 100644 (file)
--- a/include/linux/usb/ehci_pdriver.h
+++ b/include/linux/usb/ehci_pdriver.h
@@ -19,6 +19,9 @@
 #ifndef __USB_CORE_EHCI_PDRIVER_H
 #define __USB_CORE_EHCI_PDRIVER_H
 
+struct platform_device;
+struct usb_hcd;
+
 /**
  * struct usb_ehci_pdata - platform_data for generic ehci driver
  *
@@ -50,6 +53,7 @@ struct usb_ehci_pdata {
        /* Turn on only VBUS suspend power and hotplug detection,
         * turn off everything else */
        void (*power_suspend)(struct platform_device *pdev);
+       int (*pre_setup)(struct usb_hcd *hcd);
 };
 
 #endif /* __USB_CORE_EHCI_PDRIVER_H */