[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>

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 b972e715f9ee..954801b46022 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 */