linux-kernel - [PATCH] Fix SH4 DMAC API

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Message-ID: <8b67d60710060652ha54d28bj30bdc9eec514857f@mail.gmail.com>
Date:	Sat, 6 Oct 2007 14:52:43 +0100
From:	"Adrian McMenamin" <lkmladrian@...il.com>
To:	"Paul Mundt" <lethal@...ux-sh.org>
Cc:	linux-kernel@...r.kernel.org, linuxsh-dev@...rceforge.net
Subject: [PATCH] Fix SH4 DMAC API

This patch fixes the DMA cascade by masking the correct bits.

Tested and working with Dreamcast PVR2 DMA. With this patch applied
the existing mainline code in arch/sh/drivers/dma/dma-sh.c works,
whereas before I was patching that to get round this problem.

Signed-off by: Adrian McMenamin <adrian@...en.demon.co.uk>

diff --git a/include/asm-sh/cpu-sh4/dma.h b/include/asm-sh/cpu-sh4/dma.h
index 36e26a9..aaf71b0 100644
--- a/include/asm-sh/cpu-sh4/dma.h
+++ b/include/asm-sh/cpu-sh4/dma.h
@@ -31,7 +31,7 @@
 #define TS_32		0x00000030
 #define TS_64		0x00000000

-#define CHCR_TS_MASK	0x30
+#define CHCR_TS_MASK	0x70
 #define CHCR_TS_SHIFT	4

 #define DMAOR_COD	0x00000008
-
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