From patchwork Sun Sep 3 22:40:55 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Stefan_Br=C3=BCns?= X-Patchwork-Id: 9936605 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 5C64E601EB for ; Sun, 3 Sep 2017 22:41:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4D9CB285E8 for ; Sun, 3 Sep 2017 22:41:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 42528286B4; Sun, 3 Sep 2017 22:41:52 +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=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2E1E8285E8 for ; Sun, 3 Sep 2017 22:41:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=obohxn4znceIB+YIzfhfEPyxJ/IUaqP+0FLlzzbKaaM=; b=d+tyNcRi8HvjWk HLEd+huD9xGdUzRj/bk/8ENc8xGd+e5uVlU0lXkUKZuRkZux399lnsBDcjFZOon/XtX5HPOaCavxZ bxBffUyLwwrecyyz0i2G2H6hQgSAWYdHyTNYu/wa3NesoXCACFXwjZuqkAfzwkudaT/q0hKc2M8o2 fd67qwgj965Mmr1+m8bQqUDs8d9TsTEBHjEE0BzhOeJY2BdjnCSPCwwMTmZ1zTnDxh4Fq2EGyptwc 1U71fYFRBysGesYgDWdAgmEOlQXEzCBCqug1vhc65VtgO8zguKB4LF3XvY05xeGnRurku0HY+PcnX SuUurecz/Rvhafuv87CQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dodaK-00075V-3e; Sun, 03 Sep 2017 22:41:44 +0000 Received: from mail-out-2.itc.rwth-aachen.de ([134.130.5.47]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dodaF-0006x3-Ep for linux-arm-kernel@lists.infradead.org; Sun, 03 Sep 2017 22:41:42 +0000 X-IronPort-AV: E=Sophos;i="5.41,472,1498514400"; d="scan'208";a="11607788" Received: from rwthex-w2-b.rwth-ad.de ([134.130.26.159]) by mail-in-2.itc.rwth-aachen.de with ESMTP; 04 Sep 2017 00:41:10 +0200 Received: from pebbles.fritz.box (92.225.242.208) by rwthex-w2-b.rwth-ad.de (2002:8682:1a9f::8682:1a9f) with Microsoft SMTP Server (TLS) id 15.0.1320.4; Mon, 4 Sep 2017 00:41:09 +0200 From: =?UTF-8?q?Stefan=20Br=C3=BCns?= To: Subject: [PATCH 04/10] dmaengine: sun6i: Enable additional burst lengths/widths on H3 Date: Mon, 4 Sep 2017 00:40:55 +0200 Message-ID: <20170903224100.17893-5-stefan.bruens@rwth-aachen.de> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170903224100.17893-1-stefan.bruens@rwth-aachen.de> References: <20170903224100.17893-1-stefan.bruens@rwth-aachen.de> MIME-Version: 1.0 X-Originating-IP: [92.225.242.208] X-ClientProxiedBy: rwthex-w1-b.rwth-ad.de (2002:8682:1a9d::8682:1a9d) To rwthex-w2-b.rwth-ad.de (2002:8682:1a9f::8682:1a9f) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170903_154139_897574_D201F23B X-CRM114-Status: UNSURE ( 9.46 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Vinod Koul , Andre Przywara , linux-kernel@vger.kernel.org, Code Kipper , Chen-Yu Tsai , Rob Herring , dmaengine@vger.kernel.org, Maxime Ripard , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The H3 supports bursts lengths of 1, 4, 8 and 16 transfers, each with a width of 1, 2, 4 or 8 bytes. The register value for the the width is log2-encoded, change the conversion function to provide the correct value for width == 8. Signed-off-by: Stefan Brüns --- drivers/dma/sun6i-dma.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c index c5644bd0f91a..335a8ec88b0b 100644 --- a/drivers/dma/sun6i-dma.c +++ b/drivers/dma/sun6i-dma.c @@ -263,8 +263,12 @@ static inline s8 convert_burst(u32 maxburst) switch (maxburst) { case 1: return 0; + case 4: + return 1; case 8: return 2; + case 16: + return 3; default: return -EINVAL; } @@ -272,7 +276,7 @@ static inline s8 convert_burst(u32 maxburst) static inline s8 convert_buswidth(enum dma_slave_buswidth addr_width) { - return addr_width >> 1; + return ilog2(addr_width); } static size_t sun6i_get_chan_size(struct sun6i_pchan *pchan) @@ -1152,6 +1156,12 @@ static int sun6i_dma_probe(struct platform_device *pdev) BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); sdc->src_burst_lengths = BIT(1) | BIT(8); sdc->dst_burst_lengths = BIT(1) | BIT(8); + if (sdc->cfg->dmac_variant == DMAC_VARIANT_H3) { + sdc->slave.src_addr_widths |= BIT(DMA_SLAVE_BUSWIDTH_8_BYTES); + sdc->slave.dst_addr_widths |= BIT(DMA_SLAVE_BUSWIDTH_8_BYTES); + sdc->src_burst_lengths |= BIT(4) | BIT(16); + sdc->dst_burst_lengths |= BIT(4) | BIT(16); + } sdc->slave.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); sdc->slave.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;