linux-kernel - [PATCH] dma: mmp_tdma: add multiple burst size support for 910-squ

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Message-ID: <1381297228-2443-2-git-send-email-zhouqiao@marvell.com>
Date:	Wed, 9 Oct 2013 13:40:28 +0800
From:	Qiao Zhou <zhouqiao@...vell.com>
To:	<vinod.koul@...el.com>, <dan.j.williams@...el.com>,
	<zhangfei.gao@...il.com>, <linux-kernel@...r.kernel.org>,
	<chao.xie@...vell.com>
CC:	Qiao Zhou <zhouqiao@...vell.com>
Subject: [PATCH] dma: mmp_tdma: add multiple burst size support for 910-squ

add multiple burst size support for 910-squ.

Signed-off-by: Qiao Zhou <zhouqiao@...vell.com>
---
 drivers/dma/mmp_tdma.c |   25 ++++++++++++++++++++++++-
 1 files changed, 24 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 38cb517..d84354b 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -228,8 +228,31 @@ static int mmp_tdma_config_chan(struct mmp_tdma_chan *tdmac)
 			return -EINVAL;
 		}
 	} else if (tdmac->type == PXA910_SQU) {
-		tdcr |= TDCR_BURSTSZ_SQU_32B;
 		tdcr |= TDCR_SSPMOD;
+
+		switch (tdmac->burst_sz) {
+		case 1:
+			tdcr |= TDCR_BURSTSZ_SQU_1B;
+			break;
+		case 2:
+			tdcr |= TDCR_BURSTSZ_SQU_2B;
+			break;
+		case 4:
+			tdcr |= TDCR_BURSTSZ_SQU_4B;
+			break;
+		case 8:
+			tdcr |= TDCR_BURSTSZ_SQU_8B;
+			break;
+		case 16:
+			tdcr |= TDCR_BURSTSZ_SQU_16B;
+			break;
+		case 32:
+			tdcr |= TDCR_BURSTSZ_SQU_32B;
+			break;
+		default:
+			dev_err(tdmac->dev, "mmp_tdma: unknown burst size.\n");
+			return -EINVAL;
+		}
 	}
 
 	writel(tdcr, tdmac->reg_base + TDCR);
-- 
1.7.0.4

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