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authorPaul Mundt <lethal@linux-sh.org>2006-01-16 22:14:09 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-16 23:15:27 -0800
commit0d831770b154a057562236e8cf50905c8f1ae1b0 (patch)
treedc25902b29b09838f2fe32e47be53c951a2fa67e /include/asm-sh/cpu-sh3
parent0025835cf20e07056b8521b8c1d7d0bfe07e81f1 (diff)
downloadop-kernel-dev-0d831770b154a057562236e8cf50905c8f1ae1b0.zip
op-kernel-dev-0d831770b154a057562236e8cf50905c8f1ae1b0.tar.gz
[PATCH] sh: DMA updates
This extends the current SH DMA API somewhat to support a proper virtual channel abstraction, and also works to represent this through the driver model by giving each DMAC its own platform device. There's also a few other minor changes to support a few new CPU subtypes, and make TEI generation for the SH DMAC configurable. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-sh/cpu-sh3')
-rw-r--r--include/asm-sh/cpu-sh3/dma.h31
1 files changed, 30 insertions, 1 deletions
diff --git a/include/asm-sh/cpu-sh3/dma.h b/include/asm-sh/cpu-sh3/dma.h
index b972e71..954801b 100644
--- a/include/asm-sh/cpu-sh3/dma.h
+++ b/include/asm-sh/cpu-sh3/dma.h
@@ -3,5 +3,34 @@
#define SH_DMAC_BASE 0xa4000020
-#endif /* __ASM_CPU_SH3_DMA_H */
+/* Definitions for the SuperH DMAC */
+#define TM_BURST 0x00000020
+#define TS_8 0x00000000
+#define TS_16 0x00000008
+#define TS_32 0x00000010
+#define TS_128 0x00000018
+
+#define CHCR_TS_MASK 0x18
+#define CHCR_TS_SHIFT 3
+
+#define DMAOR_INIT DMAOR_DME
+/*
+ * The SuperH DMAC supports a number of transmit sizes, we list them here,
+ * with their respective values as they appear in the CHCR registers.
+ */
+enum {
+ XMIT_SZ_8BIT,
+ XMIT_SZ_16BIT,
+ XMIT_SZ_32BIT,
+ XMIT_SZ_128BIT,
+};
+
+static unsigned int ts_shift[] __attribute__ ((used)) = {
+ [XMIT_SZ_8BIT] = 0,
+ [XMIT_SZ_16BIT] = 1,
+ [XMIT_SZ_32BIT] = 2,
+ [XMIT_SZ_128BIT] = 4,
+};
+
+#endif /* __ASM_CPU_SH3_DMA_H */
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