From patchwork Thu Nov 17 12:50:16 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 9438703 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id F1C0E60235 for ; Mon, 21 Nov 2016 04:16:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E22A4288CB for ; Mon, 21 Nov 2016 04:16:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D1823288D2; Mon, 21 Nov 2016 04:16:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C72C288CB for ; Mon, 21 Nov 2016 04:16:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752985AbcKUEQI (ORCPT ); Sun, 20 Nov 2016 23:16:08 -0500 Received: from lelnx193.ext.ti.com ([198.47.27.77]:41270 "EHLO lelnx193.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752957AbcKUEQH (ORCPT ); Sun, 20 Nov 2016 23:16:07 -0500 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by lelnx193.ext.ti.com (8.15.1/8.15.1) with ESMTP id uAHCo9lP024150; Thu, 17 Nov 2016 06:50:09 -0600 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id uAHCo9De015559; Thu, 17 Nov 2016 06:50:09 -0600 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.294.0; Thu, 17 Nov 2016 06:50:08 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id uAHCo3Ei027712; Thu, 17 Nov 2016 06:50:06 -0600 From: Peter Ujfalusi To: , , , CC: , , , Subject: [PATCH v2 1/2] dmaengine: dma_slave_config: add support for slave port window Date: Thu, 17 Nov 2016 14:50:16 +0200 Message-ID: <20161117125017.14954-2-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20161117125017.14954-1-peter.ujfalusi@ti.com> References: <20161117125017.14954-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some slave devices uses address window instead of single register for read and/or write of data. With the src/dst_port_window_size the address window can be specified and the DMAengine driver should use this information to correctly set up the transfer to loop within the provided window. Signed-off-by: Peter Ujfalusi --- include/linux/dmaengine.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index cc535a478bae..689d44327ef3 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -336,6 +336,12 @@ enum dma_slave_buswidth { * may or may not be applicable on memory sources. * @dst_maxburst: same as src_maxburst but for destination target * mutatis mutandis. + * @src_port_window_size: The length of the register area the data need to be + * written on the device side. It is only used for devices which is using an + * area instead of a single register to receive the data. Typically the DMA + * loops in this area in order to transfer the data. + * @dst_port_window_size: same as src_port_window_size but for the destination + * port. * @device_fc: Flow Controller Settings. Only valid for slave channels. Fill * with 'true' if peripheral should be flow controller. Direction will be * selected at Runtime. @@ -363,6 +369,8 @@ struct dma_slave_config { enum dma_slave_buswidth dst_addr_width; u32 src_maxburst; u32 dst_maxburst; + u32 src_port_window_size; + u32 dst_port_window_size; bool device_fc; unsigned int slave_id; };