dmaengine: add driver for Freescale MPC85xx DMA controller

The driver implements DMA engine API for Freescale MPC85xx DMA controller,
which could be used by devices in the silicon.  The driver supports the
Basic mode of Freescale MPC85xx DMA controller.  The MPC85xx processors
supported include MPC8540/60, MPC8555, MPC8548, MPC8641 and so on.

The MPC83xx(MPC8349, MPC8360) are also supported.

[kamalesh@linux.vnet.ibm.com: build fix]
[dan.j.williams@intel.com: merge mm fixes, rebase on async_tx-2.6.25]
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Ebony Zhu <ebony.zhu@freescale.com>
Acked-by: Kumar Gala <galak@gate.crashing.org>
Cc: Shannon Nelson <shannon.nelson@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

MAINTAINERS

@@ -1589,6 +1589,13 @@ L:	linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
 W:	http://linux-fbdev.sourceforge.net/
 S:	Maintained
 
+FREESCALE DMA DRIVER
+P;	Zhang Wei
+M:	wei.zhang@freescale.com
+L:	linuxppc-embedded@ozlabs.org
+L:	linux-kernel@vger.kernel.org
+S:	Maintained
+
 FREESCALE SOC FS_ENET DRIVER
 P:	Pantelis Antoniou
 M:	pantelis.antoniou@gmail.com

drivers/dma/Kconfig

@@ -4,7 +4,7 @@
 
 menuconfig DMADEVICES
 	bool "DMA Engine support"
-	depends on (PCI && X86) || ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX
+	depends on (PCI && X86) || ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX || PPC
 	depends on !HIGHMEM64G
 	help
 	  DMA engines can do asynchronous data transfers without
@@ -37,6 +37,23 @@ config INTEL_IOP_ADMA
 	help
 	  Enable support for the Intel(R) IOP Series RAID engines.
 
+config FSL_DMA
+	bool "Freescale MPC85xx/MPC83xx DMA support"
+	depends on PPC
+	select DMA_ENGINE
+	---help---
+	  Enable support for the Freescale DMA engine. Now, it support
+	  MPC8560/40, MPC8555, MPC8548 and MPC8641 processors.
+	  The MPC8349, MPC8360 is also supported.
+
+config FSL_DMA_SELFTEST
+	bool "Enable the self test for each DMA channel"
+	depends on FSL_DMA
+	default y
+	---help---
+	  Enable the self test for each DMA channel. A self test will be
+	  performed after the channel probed to ensure the DMA works well.
+
 config DMA_ENGINE
 	bool
 

drivers/dma/Makefile

@@ -3,3 +3,4 @@ obj-$(CONFIG_NET_DMA) += iovlock.o
 obj-$(CONFIG_INTEL_IOATDMA) += ioatdma.o
 ioatdma-objs := ioat.o ioat_dma.o ioat_dca.o
 obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
+obj-$(CONFIG_FSL_DMA) += fsldma.o