EHCI : introduce a common ehci_setup

BugLink: http://bugs.launchpad.net/bugs/890952

commit 2093c6b49c8f1dc581d8953aca71297d4cace55e upstream.

This allow to clean duplicated code in most of SOC driver.

Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 9ff9abc7e3a..c45a116f50f 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -761,6 +761,35 @@ static int ehci_run (struct usb_hcd *hcd)
         return 0;
 }
 
+static int __maybe_unused ehci_setup (struct usb_hcd *hcd)
+{
+        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+        int retval;
+
+        ehci->regs = (void __iomem *)ehci->caps +
+            HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
+        dbg_hcs_params(ehci, "reset");
+        dbg_hcc_params(ehci, "reset");
+
+        /* cache this readonly data; minimize chip reads */
+        ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+        ehci->sbrn = HCD_USB2;
+
+        retval = ehci_halt(ehci);
+        if (retval)
+                return retval;
+
+        /* data structure init */
+        retval = ehci_init(hcd);
+        if (retval)
+                return retval;
+
+        ehci_reset(ehci);
+
+        return 0;
+}
+
 /*-------------------------------------------------------------------------*/
 
 static irqreturn_t ehci_irq (struct usb_hcd *hcd)