[PATCH RESEND 3/3] usb: gadget: udc: atmel: implement .pullup callback

[Michał Mirosław]

Implement udc->pullup callback, so that udc_connect/disconnect work.
This is needed for composite gadget, as it assumes udc_disconnect()
actually works and calls its ->disconnect callback.

Signed-off-by: Michał Mirosław <mirq-li...@rere.qmqm.pl>
---
 drivers/usb/gadget/udc/atmel_usba_udc.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c 
b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 9342a3d24963..c5128c229c52 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -1028,6 +1028,7 @@ usba_udc_set_selfpowered(struct usb_gadget *gadget, int 
is_selfpowered)
        return 0;
 }
 
+static int atmel_usba_pullup(struct usb_gadget *gadget, int is_on);
 static int atmel_usba_start(struct usb_gadget *gadget,
                struct usb_gadget_driver *driver);
 static int atmel_usba_stop(struct usb_gadget *gadget);
@@ -1101,6 +1102,7 @@ static const struct usb_gadget_ops usba_udc_ops = {
        .get_frame              = usba_udc_get_frame,
        .wakeup                 = usba_udc_wakeup,
        .set_selfpowered        = usba_udc_set_selfpowered,
+       .pullup                 = atmel_usba_pullup,
        .udc_start              = atmel_usba_start,
        .udc_stop               = atmel_usba_stop,
        .match_ep               = atmel_usba_match_ep,
@@ -1957,6 +1959,24 @@ static irqreturn_t usba_vbus_irq_thread(int irq, void 
*devid)
        return IRQ_HANDLED;
 }
 
+static int atmel_usba_pullup(struct usb_gadget *gadget, int is_on)
+{
+       struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
+       unsigned long flags;
+       u32 ctrl;
+
+       spin_lock_irqsave(&udc->lock, flags);
+       ctrl = usba_readl(udc, CTRL);
+       if (is_on)
+               ctrl &= ~USBA_DETACH;
+       else
+               ctrl |= USBA_DETACH;
+       usba_writel(udc, CTRL, ctrl);
+       spin_unlock_irqrestore(&udc->lock, flags);
+
+       return 0;
+}
+
 static int atmel_usba_start(struct usb_gadget *gadget,
                struct usb_gadget_driver *driver)
 {
-- 
2.20.1