net: davinci_emac: separate out cpdma code

In addition to being embedded into the EMAC controller, the CPDMA hardware
block is used in TI's CPSW switch controller.  Fortunately, the programming
interface to this hardware block remains pretty nicely consistent across these
devices.

This patch adds a new CPDMA services layer, which can then be reused across
EMAC and CPSW drivers.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Tested-by: Michael Williamson <michael.williamson@criticallink.com>
Tested-by: Caglar Akyuz <caglarakyuz@gmail.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

drivers/net/Kconfig

@@ -952,6 +952,7 @@ config TI_DAVINCI_EMAC
 	tristate "TI DaVinci EMAC Support"
 	depends on ARM && ( ARCH_DAVINCI || ARCH_OMAP3 )
 	select TI_DAVINCI_MDIO
+	select TI_DAVINCI_CPDMA
 	select PHYLIB
 	help
 	  This driver supports TI's DaVinci Ethernet .
@@ -969,6 +970,15 @@ config TI_DAVINCI_MDIO
 	  To compile this driver as a module, choose M here: the module
 	  will be called davinci_mdio.  This is recommended.
 
+config TI_DAVINCI_CPDMA
+	tristate "TI DaVinci CPDMA Support"
+	depends on ARM && ( ARCH_DAVINCI || ARCH_OMAP3 )
+	help
+	  This driver supports TI's DaVinci CPDMA dma engine.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called davinci_cpdma.  This is recommended.
+
 config DM9000
 	tristate "DM9000 support"
 	depends on ARM || BLACKFIN || MIPS

drivers/net/Makefile

@@ -8,6 +8,7 @@ obj-$(CONFIG_PHYLIB) += phy/
 
 obj-$(CONFIG_TI_DAVINCI_EMAC) += davinci_emac.o
 obj-$(CONFIG_TI_DAVINCI_MDIO) += davinci_mdio.o
+obj-$(CONFIG_TI_DAVINCI_CPDMA) += davinci_cpdma.o
 
 obj-$(CONFIG_E1000) += e1000/
 obj-$(CONFIG_E1000E) += e1000e/