usb: dwc2: gadget: add vbus_session support

Enable phy driver to report vbus session. This allows us to remove
D+ pullup when vbus is not present.

Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index e3bb525ae54da3ee655136f790bd830d7f0d7b50..65ec0f2dfab1010f681335f1da58beb047fe1a6f 100644 (file)
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3009,11 +3009,35 @@ static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on)
        return 0;
 }
 
+static int s3c_hsotg_vbus_session(struct usb_gadget *gadget, int is_active)
+{
+       struct dwc2_hsotg *hsotg = to_hsotg(gadget);
+       unsigned long flags;
+
+       dev_dbg(hsotg->dev, "%s: is_active: %d\n", __func__, is_active);
+       spin_lock_irqsave(&hsotg->lock, flags);
+
+       if (is_active) {
+               /* Kill any ep0 requests as controller will be reinitialized */
+               kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET);
+               s3c_hsotg_core_init_disconnected(hsotg);
+               if (hsotg->enabled)
+                       s3c_hsotg_core_connect(hsotg);
+       } else {
+               s3c_hsotg_core_disconnect(hsotg);
+               s3c_hsotg_disconnect(hsotg);
+       }
+
+       spin_unlock_irqrestore(&hsotg->lock, flags);
+       return 0;
+}
+
 static const struct usb_gadget_ops s3c_hsotg_gadget_ops = {
        .get_frame      = s3c_hsotg_gadget_getframe,
        .udc_start              = s3c_hsotg_udc_start,
        .udc_stop               = s3c_hsotg_udc_stop,
        .pullup                 = s3c_hsotg_pullup,
+       .vbus_session           = s3c_hsotg_vbus_session,
 };
 
 /**