From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751822AbaLQJTF (ORCPT ); Wed, 17 Dec 2014 04:19:05 -0500 Received: from nasmtp01.atmel.com ([192.199.1.245]:27427 "EHLO DVREDG01.corp.atmel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750799AbaLQJTD (ORCPT ); Wed, 17 Dec 2014 04:19:03 -0500 From: Bo Shen To: , CC: , , , Bo Shen Subject: [PATCH 1/2] USB: gadget: udc: atmel: change setting for DMA Date: Wed, 17 Dec 2014 17:18:48 +0800 Message-ID: <1418807929-31952-1-git-send-email-voice.shen@atmel.com> X-Mailer: git-send-email 2.1.0.24.g4109c28 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Signed-off-by: Bo Shen --- drivers/usb/gadget/udc/atmel_usba_udc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c index ce88237..63e90f5 100644 --- a/drivers/usb/gadget/udc/atmel_usba_udc.c +++ b/drivers/usb/gadget/udc/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 -- 2.1.0.24.g4109c28