dmaengine: sh: Add Support SuperH DMA Engine driver

This supported all DMA channels, and it was tested in SH7722,
SH7780, SH7785 and SH7763.
This can not use with SH DMA API.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Reviewed-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

arch/sh/drivers/dma/Kconfig

@@ -1,12 +1,9 @@
 menu "DMA support"
 
-config SH_DMA_API
-	bool
 
 config SH_DMA
 	bool "SuperH on-chip DMA controller (DMAC) support"
 	depends on CPU_SH3 || CPU_SH4
-	select SH_DMA_API
 	default n
 
 config SH_DMA_IRQ_MULTI
@@ -19,6 +16,15 @@ config SH_DMA_IRQ_MULTI
 		     CPU_SUBTYPE_SH7780  || CPU_SUBTYPE_SH7785  || \
 		     CPU_SUBTYPE_SH7760
 
+config SH_DMA_API
+	depends on SH_DMA
+	bool "SuperH DMA API support"
+	default n
+	help
+	  SH_DMA_API always enabled DMA API of used SuperH.
+	  If you want to use DMA ENGINE, you must not enable this.
+	  Please enable DMA_ENGINE and SH_DMAE.
+
 config NR_ONCHIP_DMA_CHANNELS
 	int
 	depends on SH_DMA

arch/sh/drivers/dma/Makefile

@@ -2,8 +2,7 @@
 # Makefile for the SuperH DMA specific kernel interface routines under Linux.
 #
 
-obj-$(CONFIG_SH_DMA_API)	+= dma-api.o dma-sysfs.o
-obj-$(CONFIG_SH_DMA)		+= dma-sh.o
+obj-$(CONFIG_SH_DMA_API)	+= dma-sh.o dma-api.o dma-sysfs.o
 obj-$(CONFIG_PVR2_DMA)		+= dma-pvr2.o
 obj-$(CONFIG_G2_DMA)		+= dma-g2.o
 obj-$(CONFIG_SH_DMABRG)		+= dmabrg.o

arch/sh/include/asm/dma-sh.h

@@ -115,4 +115,17 @@ static u32 dma_base_addr[] __maybe_unused = {
 #define CHCR    0x0C
 #define DMAOR	0x40
 
+/*
+ * for dma engine
+ *
+ * SuperH DMA mode
+ */
+#define SHDMA_MIX_IRQ	(1 << 1)
+#define SHDMA_DMAOR1	(1 << 2)
+#define SHDMA_DMAE1		(1 << 3)
+
+struct sh_dmae_pdata {
+	unsigned int mode;
+};
+
 #endif /* __DMA_SH_H */