From patchwork Mon Jul 25 01:28:21 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "boojin.kim" X-Patchwork-Id: 1003562 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p6P1ZA6N019240 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 25 Jul 2011 01:35:31 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QlA4N-0006Oc-0c; Mon, 25 Jul 2011 01:34:55 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QlA4M-0007XM-J4; Mon, 25 Jul 2011 01:34:54 +0000 Received: from ganesha.gnumonks.org ([2001:780:45:1d:2e0:81ff:fe28:898a]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QlA3g-0007P4-BB for linux-arm-kernel@lists.infradead.org; Mon, 25 Jul 2011 01:34:15 +0000 Received: from uucp by ganesha.gnumonks.org with local-bsmtp (Exim 4.72) (envelope-from ) id 1QlA3Y-0007w2-Ha; Mon, 25 Jul 2011 03:34:04 +0200 Received: from [12.23.102.153] (helo=sunrise.dsn.sec.samsung.com) by jackpot.kr.gnumonks.org with esmtp (Exim 4.69) (envelope-from ) id 1Ql9C1-0005vO-GP; Mon, 25 Jul 2011 09:38:45 +0900 From: Boojin Kim To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH V4 03/14] DMA: PL330: Support DMA_SLAVE_CONFIG command Date: Mon, 25 Jul 2011 10:28:21 +0900 Message-Id: <1311557312-26107-4-git-send-email-boojin.kim@samsung.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1311557312-26107-1-git-send-email-boojin.kim@samsung.com> References: <1311557312-26107-1-git-send-email-boojin.kim@samsung.com> X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110724_213412_957474_29BB644E X-CRM114-Status: GOOD ( 15.62 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- Cc: Kukjin Kim , Boojin Kim , Vinod Koul , Jassi Brar , Grant Likely , Mark Brown , Dan Williams X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Mon, 25 Jul 2011 01:35:31 +0000 (UTC) This patch adds support DMA_SLAVE_CONFIG command. Signed-off-by: Boojin Kim --- drivers/dma/pl330.c | 53 +++++++++++++++++++++++++++++++++++++------------- 1 files changed, 39 insertions(+), 14 deletions(-) diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 586ab39..880f010 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -256,25 +256,50 @@ static int pl330_alloc_chan_resources(struct dma_chan *chan) static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned long arg) { struct dma_pl330_chan *pch = to_pchan(chan); - struct dma_pl330_desc *desc; + struct dma_pl330_desc *desc, *_dt; unsigned long flags; + struct dma_pl330_dmac *pdmac = pch->dmac; + struct dma_slave_config *slave_config; + struct dma_pl330_peri *peri; + LIST_HEAD(list); - /* Only supports DMA_TERMINATE_ALL */ - if (cmd != DMA_TERMINATE_ALL) - return -ENXIO; - - spin_lock_irqsave(&pch->lock, flags); - - /* FLUSH the PL330 Channel thread */ - pl330_chan_ctrl(pch->pl330_chid, PL330_OP_FLUSH); + switch (cmd) { + case DMA_TERMINATE_ALL: + spin_lock_irqsave(&pch->lock, flags); - /* Mark all desc done */ - list_for_each_entry(desc, &pch->work_list, node) - desc->status = DONE; + /* FLUSH the PL330 Channel thread */ + pl330_chan_ctrl(pch->pl330_chid, PL330_OP_FLUSH); - spin_unlock_irqrestore(&pch->lock, flags); + /* Mark all desc done */ + list_for_each_entry_safe(desc, _dt, &pch->work_list , node) { + desc->status = DONE; + pch->completed = desc->txd.cookie; + list_move_tail(&desc->node, &list); + } - pl330_tasklet((unsigned long) pch); + list_splice_tail_init(&list, &pdmac->desc_pool); + spin_unlock_irqrestore(&pch->lock, flags); + break; + case DMA_SLAVE_CONFIG: + slave_config = (struct dma_slave_config *)arg; + peri = pch->chan.private; + + if (slave_config->direction == DMA_TO_DEVICE) { + if (slave_config->dst_addr) + peri->fifo_addr = slave_config->dst_addr; + if (slave_config->dst_addr_width) + peri->burst_sz = __ffs(slave_config->dst_addr_width); + } else if (slave_config->direction == DMA_FROM_DEVICE) { + if (slave_config->src_addr) + peri->fifo_addr = slave_config->src_addr; + if (slave_config->src_addr_width) + peri->burst_sz = __ffs(slave_config->src_addr_width); + } + break; + default: + dev_err(pch->dmac->pif.dev, "Not supported command.\n"); + return -ENXIO; + } return 0; }