[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, 33 insertions, 11 deletions

diff --git a/arch/sh/drivers/dma/dma-sh.h b/arch/sh/drivers/dma/dma-sh.h
index dd9d547539a2..0f591fbc922d 100644
--- a/arch/sh/drivers/dma/dma-sh.h
+++ b/arch/sh/drivers/dma/dma-sh.h
@@ -11,6 +11,8 @@
 #ifndef __DMA_SH_H
 #define __DMA_SH_H
 
+#include <asm/cpu/dma.h>
+
 /* Definitions for the SuperH DMAC */
 #define REQ_L	0x00000000
 #define REQ_E	0x00080000
@@ -26,27 +28,47 @@
 #define SM_DEC	0x00002000
 #define RS_IN	0x00000200
 #define RS_OUT	0x00000300
-#define TM_BURST 0x0000080
-#define TS_8	0x00000010
-#define TS_16	0x00000020
-#define TS_32	0x00000030
-#define TS_64	0x00000000
 #define TS_BLK	0x00000040
 #define CHCR_DE 0x00000001
 #define CHCR_TE 0x00000002
 #define CHCR_IE 0x00000004
 
-/* Define the default configuration for dual address memory-memory transfer.
- * The 0x400 value represents auto-request, external->external.
- */
-#define RS_DUAL	(DM_INC | SM_INC | 0x400 | TS_32)
-
-#define DMAOR_COD	0x00000008
+/* DMAOR definitions */
 #define DMAOR_AE	0x00000004
 #define DMAOR_NMIF	0x00000002
 #define DMAOR_DME	0x00000001
 
+/*
+ * Define the default configuration for dual address memory-memory transfer.
+ * The 0x400 value represents auto-request, external->external.
+ */
+#define RS_DUAL	(DM_INC | SM_INC | 0x400 | TS_32)
+
 #define MAX_DMAC_CHANNELS	(CONFIG_NR_ONCHIP_DMA_CHANNELS)
 
+/*
+ * Subtypes that have fewer channels than this simply need to change
+ * CONFIG_NR_ONCHIP_DMA_CHANNELS. Likewise, subtypes with a larger number
+ * of channels should expand on this.
+ *
+ * For most subtypes we can easily figure these values out with some
+ * basic calculation, unfortunately on other subtypes these are more
+ * scattered, so we just leave it unrolled for simplicity.
+ */
+#define SAR	((unsigned long[]){SH_DMAC_BASE + 0x00, SH_DMAC_BASE + 0x10, \
+				   SH_DMAC_BASE + 0x20, SH_DMAC_BASE + 0x30, \
+				   SH_DMAC_BASE + 0x50, SH_DMAC_BASE + 0x60})
+#define DAR	((unsigned long[]){SH_DMAC_BASE + 0x04, SH_DMAC_BASE + 0x14, \
+				   SH_DMAC_BASE + 0x24, SH_DMAC_BASE + 0x34, \
+				   SH_DMAC_BASE + 0x54, SH_DMAC_BASE + 0x64})
+#define DMATCR	((unsigned long[]){SH_DMAC_BASE + 0x08, SH_DMAC_BASE + 0x18, \
+				   SH_DMAC_BASE + 0x28, SH_DMAC_BASE + 0x38, \
+				   SH_DMAC_BASE + 0x58, SH_DMAC_BASE + 0x68})
+#define CHCR	((unsigned long[]){SH_DMAC_BASE + 0x0c, SH_DMAC_BASE + 0x1c, \
+				   SH_DMAC_BASE + 0x2c, SH_DMAC_BASE + 0x3c, \
+				   SH_DMAC_BASE + 0x5c, SH_DMAC_BASE + 0x6c})
+
+#define DMAOR	(SH_DMAC_BASE + 0x40)
+
 #endif /* __DMA_SH_H */