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[PATCH] Fix SH4 DMAC API

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From: Adrian McMenamin <lkmladrian@...>
To: Paul Mundt <lethal@...>
Cc: <linux-kernel@...>, <linuxsh-dev@...>
Subject: [PATCH] Fix SH4 DMAC API
Date: Saturday, October 6, 2007 - 9:52 am

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@mcmen.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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Messages in current thread:
[PATCH] Fix SH4 DMAC API, Adrian McMenamin, (Sat Oct 6, 9:52 am)
Re: [PATCH] Fix SH4 DMAC API, Paul Mundt, (Sun Oct 7, 4:10 pm)