From patchwork Wed Oct 22 15:43:52 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 5134531 Return-Path: X-Original-To: patchwork-dmaengine@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id F037BC11AC for ; Wed, 22 Oct 2014 16:00:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E5D9A200E8 for ; Wed, 22 Oct 2014 16:00:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C5E1C201F4 for ; Wed, 22 Oct 2014 16:00:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754841AbaJVPpv (ORCPT ); Wed, 22 Oct 2014 11:45:51 -0400 Received: from down.free-electrons.com ([37.187.137.238]:54095 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754775AbaJVPpt (ORCPT ); Wed, 22 Oct 2014 11:45:49 -0400 Received: by mail.free-electrons.com (Postfix, from userid 106) id 2F050501B; Wed, 22 Oct 2014 17:45:48 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost (col31-4-88-188-83-94.fbx.proxad.net [88.188.83.94]) by mail.free-electrons.com (Postfix) with ESMTPSA id 799DD500A; Wed, 22 Oct 2014 17:45:47 +0200 (CEST) From: Maxime Ripard To: dmaengine@vger.kernel.org, Vinod Koul Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Laurent Pinchart , =?UTF-8?q?Antoine=20T=C3=A9nart?= , lars@metafoo.de, Russell King , Maxime Ripard , Dan Williams Subject: [PATCH v3 38/59] dmaengine: sa11x0: Split device_control Date: Wed, 22 Oct 2014 17:43:52 +0200 Message-Id: <1413992653-21963-39-git-send-email-maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.1.1 In-Reply-To: <1413992653-21963-1-git-send-email-maxime.ripard@free-electrons.com> References: <1413992653-21963-1-git-send-email-maxime.ripard@free-electrons.com> Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Split the device_control callback of the SA-11x0 DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard --- drivers/dma/sa11x0-dma.c | 158 +++++++++++++++++++++++++---------------------- 1 file changed, 84 insertions(+), 74 deletions(-) diff --git a/drivers/dma/sa11x0-dma.c b/drivers/dma/sa11x0-dma.c index 4b0ef043729a..432342459ab5 100644 --- a/drivers/dma/sa11x0-dma.c +++ b/drivers/dma/sa11x0-dma.c @@ -669,8 +669,10 @@ static struct dma_async_tx_descriptor *sa11x0_dma_prep_dma_cyclic( return vchan_tx_prep(&c->vc, &txd->vd, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); } -static int sa11x0_dma_slave_config(struct sa11x0_dma_chan *c, struct dma_slave_config *cfg) +static int sa11x0_dma_slave_config(struct dma_chan *chan, + struct dma_slave_config *cfg) { + struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan); u32 ddar = c->ddar & ((0xf << 4) | DDAR_RW); dma_addr_t addr; enum dma_slave_buswidth width; @@ -704,8 +706,7 @@ static int sa11x0_dma_slave_config(struct sa11x0_dma_chan *c, struct dma_slave_c return 0; } -static int sa11x0_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, - unsigned long arg) +static int sa11x0_dma_pause(struct dma_chan *chan) { struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan); struct sa11x0_dma_dev *d = to_sa11x0_dma(chan->device); @@ -714,89 +715,95 @@ static int sa11x0_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned long flags; int ret; - switch (cmd) { - case DMA_SLAVE_CONFIG: - return sa11x0_dma_slave_config(c, (struct dma_slave_config *)arg); - - case DMA_TERMINATE_ALL: - dev_dbg(d->slave.dev, "vchan %p: terminate all\n", &c->vc); - /* Clear the tx descriptor lists */ - spin_lock_irqsave(&c->vc.lock, flags); - vchan_get_all_descriptors(&c->vc, &head); + dev_dbg(d->slave.dev, "vchan %p: pause\n", &c->vc); + spin_lock_irqsave(&c->vc.lock, flags); + if (c->status == DMA_IN_PROGRESS) { + c->status = DMA_PAUSED; p = c->phy; if (p) { - dev_dbg(d->slave.dev, "pchan %u: terminating\n", p->num); - /* vchan is assigned to a pchan - stop the channel */ - writel(DCSR_RUN | DCSR_IE | - DCSR_STRTA | DCSR_DONEA | - DCSR_STRTB | DCSR_DONEB, - p->base + DMA_DCSR_C); - - if (p->txd_load) { - if (p->txd_load != p->txd_done) - list_add_tail(&p->txd_load->vd.node, &head); - p->txd_load = NULL; - } - if (p->txd_done) { - list_add_tail(&p->txd_done->vd.node, &head); - p->txd_done = NULL; - } - c->phy = NULL; + writel(DCSR_RUN | DCSR_IE, p->base + DMA_DCSR_C); + } else { spin_lock(&d->lock); - p->vchan = NULL; + list_del_init(&c->node); spin_unlock(&d->lock); - tasklet_schedule(&d->task); } - spin_unlock_irqrestore(&c->vc.lock, flags); - vchan_dma_desc_free_list(&c->vc, &head); - ret = 0; - break; + } + spin_unlock_irqrestore(&c->vc.lock, flags); - case DMA_PAUSE: - dev_dbg(d->slave.dev, "vchan %p: pause\n", &c->vc); - spin_lock_irqsave(&c->vc.lock, flags); - if (c->status == DMA_IN_PROGRESS) { - c->status = DMA_PAUSED; + return 0; +} - p = c->phy; - if (p) { - writel(DCSR_RUN | DCSR_IE, p->base + DMA_DCSR_C); - } else { - spin_lock(&d->lock); - list_del_init(&c->node); - spin_unlock(&d->lock); - } - } - spin_unlock_irqrestore(&c->vc.lock, flags); - ret = 0; - break; +static int sa11x0_dma_resume(struct dma_chan *chan) +{ + struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan); + struct sa11x0_dma_dev *d = to_sa11x0_dma(chan->device); + struct sa11x0_dma_phy *p; + LIST_HEAD(head); + unsigned long flags; + int ret; - case DMA_RESUME: - dev_dbg(d->slave.dev, "vchan %p: resume\n", &c->vc); - spin_lock_irqsave(&c->vc.lock, flags); - if (c->status == DMA_PAUSED) { - c->status = DMA_IN_PROGRESS; - - p = c->phy; - if (p) { - writel(DCSR_RUN | DCSR_IE, p->base + DMA_DCSR_S); - } else if (!list_empty(&c->vc.desc_issued)) { - spin_lock(&d->lock); - list_add_tail(&c->node, &d->chan_pending); - spin_unlock(&d->lock); - } + dev_dbg(d->slave.dev, "vchan %p: resume\n", &c->vc); + spin_lock_irqsave(&c->vc.lock, flags); + if (c->status == DMA_PAUSED) { + c->status = DMA_IN_PROGRESS; + + p = c->phy; + if (p) { + writel(DCSR_RUN | DCSR_IE, p->base + DMA_DCSR_S); + } else if (!list_empty(&c->vc.desc_issued)) { + spin_lock(&d->lock); + list_add_tail(&c->node, &d->chan_pending); + spin_unlock(&d->lock); } - spin_unlock_irqrestore(&c->vc.lock, flags); - ret = 0; - break; + } + spin_unlock_irqrestore(&c->vc.lock, flags); - default: - ret = -ENXIO; - break; + return 0; +} + +static int sa11x0_dma_terminate_all(struct dma_chan *chan) +{ + struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan); + struct sa11x0_dma_dev *d = to_sa11x0_dma(chan->device); + struct sa11x0_dma_phy *p; + LIST_HEAD(head); + unsigned long flags; + int ret; + + dev_dbg(d->slave.dev, "vchan %p: terminate all\n", &c->vc); + /* Clear the tx descriptor lists */ + spin_lock_irqsave(&c->vc.lock, flags); + vchan_get_all_descriptors(&c->vc, &head); + + p = c->phy; + if (p) { + dev_dbg(d->slave.dev, "pchan %u: terminating\n", p->num); + /* vchan is assigned to a pchan - stop the channel */ + writel(DCSR_RUN | DCSR_IE | + DCSR_STRTA | DCSR_DONEA | + DCSR_STRTB | DCSR_DONEB, + p->base + DMA_DCSR_C); + + if (p->txd_load) { + if (p->txd_load != p->txd_done) + list_add_tail(&p->txd_load->vd.node, &head); + p->txd_load = NULL; + } + if (p->txd_done) { + list_add_tail(&p->txd_done->vd.node, &head); + p->txd_done = NULL; + } + c->phy = NULL; + spin_lock(&d->lock); + p->vchan = NULL; + spin_unlock(&d->lock); + tasklet_schedule(&d->task); } + spin_unlock_irqrestore(&c->vc.lock, flags); + vchan_dma_desc_free_list(&c->vc, &head); - return ret; + return 0; } struct sa11x0_dma_channel_desc { @@ -834,7 +841,10 @@ static int sa11x0_dma_init_dmadev(struct dma_device *dmadev, dmadev->dev = dev; dmadev->device_alloc_chan_resources = sa11x0_dma_alloc_chan_resources; dmadev->device_free_chan_resources = sa11x0_dma_free_chan_resources; - dmadev->device_control = sa11x0_dma_control; + dmadev->device_config = sa11x0_dma_slave_config; + dmadev->device_pause = sa11x0_dma_pause; + dmadev->device_resume = sa11x0_dma_resume; + dmadev->device_terminate_all = sa11x0_dma_terminate_all; dmadev->device_tx_status = sa11x0_dma_tx_status; dmadev->device_issue_pending = sa11x0_dma_issue_pending;