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authorGregory Herrero <gregory.herrero@intel.com>2015-01-09 13:39:02 +0100
committerFelipe Balbi <balbi@ti.com>2015-01-12 15:34:23 -0600
commit83d982234ee65900521e763161f409b29f89b8f6 (patch)
tree70637ef3ebcb0d035c4fa45339010efe69ef6426 /drivers/usb/dwc2
parent48b20bcb3b2e9b15be1ebb9b574b003cffb033d5 (diff)
downloadlinux-83d982234ee65900521e763161f409b29f89b8f6.tar.bz2
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>
Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r--drivers/usb/dwc2/gadget.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index e3bb525ae54d..65ec0f2dfab1 100644
--- 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,
};
/**