[PATCH 14/14] usb: udc-core: add judgement logic for usb_gadget_connect

Peter Chen
2013-03-14T05:50:42Z

- If there is no vbus control to indicate connection.
and disconnect, we can pullup dp when we load gadget module.
- If we have vbus control logic, the dp is better pull up
when there is a vbus session.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
---
drivers/usb/gadget/udc-core.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index 4d90bdf..4b56f7c 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -278,7 +278,10 @@ static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *dri
driver->unbind(gadget);
goto err1;
}
- usb_gadget_connect(gadget);
+ if (!gadget->ops->vbus_session ||
+ (gadget->ops->vbus_session
+ && gadget->vbus_active))
+ usb_gadget_connect(gadget);

kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
return 0;
@@ -384,7 +387,10 @@ static ssize_t usb_udc_softconn_store(struct device *dev,

if (sysfs_streq(buf, "connect")) {
usb_gadget_udc_start(gadget, udc->driver);
- usb_gadget_connect(gadget);
+ if (!gadget->ops->vbus_session ||
+ (gadget->ops->vbus_session
+ && gadget->vbus_active))
+ usb_gadget_connect(gadget);
} else if (sysfs_streq(buf, "disconnect")) {
usb_gadget_disconnect(gadget);
usb_gadget_udc_stop(gadget, udc->driver);
--
1.7.0.4