[PATCH 3/4] usb: chipidea: udc: add pullup/pulldown dp at hw_device_state

[Peter Chen]

- During the connect/disconnect host, we need to pullup
and pulldown dp
- Make sure the dp is not pullup until the vbus is on when
flag CI13XXX_PULLUP_ON_VBUS is set

Signed-off-by: Peter Chen <peter.c...@freescale.com>
---
 drivers/usb/chipidea/udc.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index b52cb10..0ed2e1a 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -90,8 +90,10 @@ static int hw_device_state(struct ci13xxx *ci, u32 dma)
                /* interrupt, error, port change, reset, sleep/suspend */
                hw_write(ci, OP_USBINTR, ~0,
                             USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
+               hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
        } else {
                hw_write(ci, OP_USBINTR, ~0, 0);
+               hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
        }
        return 0;
 }
@@ -1423,6 +1425,10 @@ static int ci13xxx_pullup(struct usb_gadget *_gadget, 
int is_on)
 {
        struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget);
 
+       if ((ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) &&
+                       !ci->vbus_active)
+               return 0;
+
        if (is_on)
                hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
        else
-- 
1.7.0.4


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