usb: gadget: udc: atmel: change setting for DMA

commit f40afdddeb6c54ffd1e2920a5e93e363d6748db6 upstream.

According to the datasheet, when transfer using DMA, the control
setting for IN packet only need END_BUF_EN, END_BUF_IE, CH_EN,
while for OUT packet, need more two bits END_TR_EN and END_TR_IE
to be configured.

Fixes: 914a3f3b3754 (USB: add atmel_usba_udc driver)
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
[ luis: backported to 3.16:
  - file rename: drivers/usb/gadget/udc/atmel_usba_udc.c ->
    drivers/usb/gadget/atmel_usba_udc.c ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 76023ce449a39cd82db862719f7392d36b4deb57..9fff23fa151939662c1e7c0975be7afa461fb6e9 100644 (file)
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -716,10 +716,10 @@ static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
        req->using_dma = 1;
        req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length)
                        | USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE
-                       | USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
+                       | USBA_DMA_END_BUF_EN;
 
-       if (ep->is_in)
-               req->ctrl |= USBA_DMA_END_BUF_EN;
+       if (!ep->is_in)
+               req->ctrl |= USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
 
        /*
         * Add this request to the queue and submit for DMA if