From patchwork Wed Nov 17 10:44:12 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sekhar Nori X-Patchwork-Id: 331921 Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oAHAurVb013232 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 17 Nov 2010 10:57:14 GMT Received: from localhost ([127.0.0.1] helo=sfs-ml-2.v29.ch3.sourceforge.com) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1PIfh7-0002yg-5J; Wed, 17 Nov 2010 10:56:53 +0000 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1PIfh6-0002yV-8e for spi-devel-general@lists.sourceforge.net; Wed, 17 Nov 2010 10:56:52 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of india.ti.com designates 198.47.26.153 as permitted sender) client-ip=198.47.26.153; envelope-from=a0875516@india.ti.com; helo=devils.ext.ti.com; Received: from devils.ext.ti.com ([198.47.26.153]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69) id 1PIfh5-0002q0-AZ; Wed, 17 Nov 2010 10:56:52 +0000 Received: from dbdp31.itg.ti.com ([172.24.170.98]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id oAHAiZL2003612 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 17 Nov 2010 04:44:37 -0600 Received: from psplinux051.india.ti.com (localhost [127.0.0.1]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id oAHAiVPc021927; Wed, 17 Nov 2010 16:14:31 +0530 (IST) Received: from psplinux051.india.ti.com (localhost [127.0.0.1]) by psplinux051.india.ti.com (8.13.1/8.13.1) with ESMTP id oAHAiQOb030538; Wed, 17 Nov 2010 16:14:26 +0530 Received: (from a0875516@localhost) by psplinux051.india.ti.com (8.13.1/8.13.1/Submit) id oAHAiQRO030535; Wed, 17 Nov 2010 16:14:26 +0530 From: Sekhar Nori To: spi-devel-general@lists.sourceforge.net Subject: [PATCH 40/49] spi: davinci: remove usage of additional completion variables for DMA Date: Wed, 17 Nov 2010 16:14:12 +0530 Message-Id: <1289990661-30126-41-git-send-email-nsekhar@ti.com> X-Mailer: git-send-email 1.6.2.4 In-Reply-To: <1289990661-30126-40-git-send-email-nsekhar@ti.com> References: <1289990661-30126-1-git-send-email-nsekhar@ti.com> <1289990661-30126-2-git-send-email-nsekhar@ti.com> <1289990661-30126-3-git-send-email-nsekhar@ti.com> <1289990661-30126-4-git-send-email-nsekhar@ti.com> <1289990661-30126-5-git-send-email-nsekhar@ti.com> <1289990661-30126-6-git-send-email-nsekhar@ti.com> <1289990661-30126-7-git-send-email-nsekhar@ti.com> <1289990661-30126-8-git-send-email-nsekhar@ti.com> <1289990661-30126-9-git-send-email-nsekhar@ti.com> <1289990661-30126-10-git-send-email-nsekhar@ti.com> <1289990661-30126-11-git-send-email-nsekhar@ti.com> <1289990661-30126-12-git-send-email-nsekhar@ti.com> <1289990661-30126-13-git-send-email-nsekhar@ti.com> <1289990661-30126-14-git-send-email-nsekhar@ti.com> <1289990661-30126-15-git-send-email-nsekhar@ti.com> <1289990661-30126-16-git-send-email-nsekhar@ti.com> <1289990661-30126-17-git-send-email-nsekhar@ti.com> <1289990661-30126-18-git-send-email-nsekhar@ti.com> <1289990661-30126-19-git-send-email-nsekhar@ti.com> <1289990661-30126-20-git-send-email-nsekhar@ti.com> <1289990661-30126-21-git-send-email-nsekhar@ti.com> <1289990661-30126-22-git-send-email-nsekhar@ti.com> <1289990661-30126-23-git-send-email-nsekhar@ti.com> <1289990661-30126-24-git-send-email-nsekhar@ti.com> <1289990661-30126-25-git-send-email-nsekhar@ti.com> <1289990661-30126-26-git-send-email-nsekhar@ti.com> <1289990661-30126-27-git-send-email-nsekhar@ti.com> <1289990661-30126-28-git-send-email-nsekhar@ti.com> <1289990661-30126-29-git-send-email-nsekhar@ti.com> <1289990661-30126-30-git-send-email-nsekhar@ti.com> <1289990661-30126-31-git-send-email-nsekhar@ti.com> <1289990661-30126-32-git-send-email-nsekhar@ti.com> <1289990661-30126-33-git-send-email-nsekhar@ti.com> <1289990661-30126-34-git-send-email-nsekhar@ti.com> <1289990661-30126-35-git-send-email-nsekhar@ti.com> <1289990661-30126-36-git-send-email-nsekhar@ti.com> <1289990661-30126-37-git-send-email-nsekhar@ti.com> <1289990661-30126-38-git-send-email-nsekhar@ti.com> <1289990661-30126-39-git-send-email-nsekhar@ti.com> <1289990661-30126-40-git-send-email-nsekhar@ti.com> X-Spam-Score: -1.4 (-) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 0.0 SINGLE_HEADER_2K A single header contains 2K-3K characters -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record 0.1 AWL AWL: From: address is in the auto white-list X-Headers-End: 1PIfh5-0002q0-AZ Cc: davinci-linux-open-source@linux.davincidsp.com, David Brownell , Sekhar Nori X-BeenThere: spi-devel-general@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Linux SPI core/device drivers discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: spi-devel-general-bounces@lists.sourceforge.net X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Wed, 17 Nov 2010 10:57:14 +0000 (UTC) different DMA completion callback functions for tx and rx and use a single callback function instead] Signed-off-by: Brian Niebuhr Tested-By: Michael Williamson Signed-off-by: Sekhar Nori --- drivers/spi/davinci_spi.c | 58 +++++++++++++++++--------------------------- 1 files changed, 23 insertions(+), 35 deletions(-) diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c index a47947d..6094e3a 100644 --- a/drivers/spi/davinci_spi.c +++ b/drivers/spi/davinci_spi.c @@ -118,9 +118,6 @@ struct davinci_spi_dma { int dma_rx_channel; int dummy_param_slot; enum dma_event_q eventq; - - struct completion dma_tx_completion; - struct completion dma_rx_completion; }; /* SPI Controller driver's private data. */ @@ -386,32 +383,6 @@ static int davinci_spi_setup_transfer(struct spi_device *spi, return 0; } -static void davinci_spi_dma_rx_callback(unsigned lch, u16 ch_status, void *data) -{ - struct davinci_spi *davinci_spi = data; - struct davinci_spi_dma *davinci_spi_dma = &davinci_spi->dma_channels; - - edma_stop(davinci_spi_dma->dma_rx_channel); - - if (ch_status == DMA_COMPLETE) - davinci_spi->rcount = 0; - - complete(&davinci_spi_dma->dma_rx_completion); -} - -static void davinci_spi_dma_tx_callback(unsigned lch, u16 ch_status, void *data) -{ - struct davinci_spi *davinci_spi = data; - struct davinci_spi_dma *davinci_spi_dma = &davinci_spi->dma_channels; - - edma_stop(davinci_spi_dma->dma_tx_channel); - - if (ch_status == DMA_COMPLETE) - davinci_spi->wcount = 0; - - complete(&davinci_spi_dma->dma_tx_completion); -} - /** * davinci_spi_setup - This functions will set default transfer method * @spi: spi device on which data transfer to be done @@ -630,6 +601,25 @@ static irqreturn_t davinci_spi_irq(s32 irq, void *context_data) return IRQ_HANDLED; } +static void davinci_spi_dma_callback(unsigned lch, u16 status, void *data) +{ + struct davinci_spi *davinci_spi = data; + struct davinci_spi_dma *davinci_spi_dma = &davinci_spi->dma_channels; + + edma_stop(lch); + + if (status == DMA_COMPLETE) { + if (lch == davinci_spi_dma->dma_rx_channel) + davinci_spi->rcount = 0; + if (lch == davinci_spi_dma->dma_tx_channel) + davinci_spi->wcount = 0; + } + + if ((!davinci_spi->wcount && !davinci_spi->rcount) || + (status != DMA_COMPLETE)) + complete(&davinci_spi->done); +} + static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t) { struct davinci_spi *davinci_spi; @@ -660,8 +650,7 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t) davinci_spi->wcount = t->len / data_type; davinci_spi->rcount = davinci_spi->wcount; - init_completion(&davinci_spi_dma->dma_rx_completion); - init_completion(&davinci_spi_dma->dma_tx_completion); + INIT_COMPLETION(davinci_spi->done); /* disable all interrupts for dma transfers */ clear_io_bits(davinci_spi->base + SPIINT, SPIINT_MASKALL); @@ -752,8 +741,7 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t) edma_start(davinci_spi_dma->dma_tx_channel); set_io_bits(davinci_spi->base + SPIINT, SPIINT_DMA_REQ_EN); - wait_for_completion_interruptible(&davinci_spi_dma->dma_tx_completion); - wait_for_completion_interruptible(&davinci_spi_dma->dma_rx_completion); + wait_for_completion_interruptible(&davinci_spi->done); if (t->tx_buf) dma_unmap_single(NULL, t->tx_dma, davinci_spi->wcount, @@ -787,7 +775,7 @@ static int davinci_spi_request_dma(struct davinci_spi *davinci_spi) struct davinci_spi_dma *davinci_spi_dma = &davinci_spi->dma_channels; r = edma_alloc_channel(davinci_spi_dma->dma_rx_channel, - davinci_spi_dma_rx_callback, davinci_spi, + davinci_spi_dma_callback, davinci_spi, davinci_spi_dma->eventq); if (r < 0) { pr_err("Unable to request DMA channel for SPI RX\n"); @@ -796,7 +784,7 @@ static int davinci_spi_request_dma(struct davinci_spi *davinci_spi) } r = edma_alloc_channel(davinci_spi_dma->dma_tx_channel, - davinci_spi_dma_tx_callback, davinci_spi, + davinci_spi_dma_callback, davinci_spi, davinci_spi_dma->eventq); if (r < 0) { pr_err("Unable to request DMA channel for SPI TX\n");