From patchwork Tue Nov 29 14:23:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 9452203 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 AAB7A60761 for ; Tue, 29 Nov 2016 14:24:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B8ED28325 for ; Tue, 29 Nov 2016 14:24:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 906B12835B; Tue, 29 Nov 2016 14:24:36 +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 9EAA52833B for ; Tue, 29 Nov 2016 14:24:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755011AbcK2OYa (ORCPT ); Tue, 29 Nov 2016 09:24:30 -0500 Received: from fllnx210.ext.ti.com ([198.47.19.17]:55354 "EHLO fllnx210.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757155AbcK2OYU (ORCPT ); Tue, 29 Nov 2016 09:24:20 -0500 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by fllnx210.ext.ti.com (8.15.1/8.15.1) with ESMTP id uATENPsL021470; Tue, 29 Nov 2016 08:23:25 -0600 Received: from DLEE70.ent.ti.com (dlee70.ent.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id uATENPkC013503; Tue, 29 Nov 2016 08:23:25 -0600 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.294.0; Tue, 29 Nov 2016 08:23:24 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id uATENJhI006591; Tue, 29 Nov 2016 08:23:22 -0600 From: Peter Ujfalusi To: , , , CC: , , , Subject: [PATCH v3 1/2] dmaengine: dma_slave_config: add support for slave port window Date: Tue, 29 Nov 2016 16:23:41 +0200 Message-ID: <20161129142342.30949-2-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.11.0.rc2 In-Reply-To: <20161129142342.30949-1-peter.ujfalusi@ti.com> References: <20161129142342.30949-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@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..feee6ec6a13b 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 in words the data need + * to be accessed 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; };