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...
Suggested-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
---
Changes since the original posting:
- changed init() method to pre_setup() with different parameters abd call site.
drivers/usb/host/ehci-platform.c | 6 ++++++
include/linux/usb/ehci_pdriver.h | 3 +++
2 files changed, 9 insertions(+)
Index: renesas/drivers/usb/host/ehci-platform.c
===================================================================
--- renesas.orig/drivers/usb/host/ehci-platform.c
+++ renesas/drivers/usb/host/ehci-platform.c
@@ -46,6 +46,12 @@ static int ehci_platform_reset(struct us
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)
Index: renesas/include/linux/usb/ehci_pdriver.h
===================================================================
--- renesas.orig/include/linux/usb/ehci_pdriver.h
+++ renesas/include/linux/usb/ehci_pdriver.h
@@ -19,6 +19,8 @@
#ifndef __USB_CORE_EHCI_PDRIVER_H
#define __USB_CORE_EHCI_PDRIVER_H
+#include <linux/usb/hcd.h>
+
/**
* struct usb_ehci_pdata - platform_data for generic ehci driver
*
@@ -50,6 +52,7 @@ 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 */
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